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7
Pathophys.
6
Phenotypes
13
Pathograph
1
Genes
3
Treatments
2
Differentials
2
Trials
30
References
1
Deep Research

Pathophysiology

7
AQP4-Reactive B Cell Autoantibody Production
Peripheral B-lineage cells generate pathogenic AQP4-IgG, creating the circulating autoantibody substrate for astrocyte-targeted NMOSD attacks.
B cell link plasma cell link plasmablast link
AQP4 link
Show evidence (2 references)
PMID:31495497 SUPPORT Human Clinical
"of inebilizumab, an anti-CD19, B cell-depleting antibody, in reducing the risk of attacks and disability in NMOSD."
This supports B-lineage cells as a therapeutically relevant upstream driver of NMOSD attacks.
PMID:36933107 SUPPORT Human Clinical
"which is designed to suppress autoantibody production by blocking the interleukin-6 (IL-6) receptor"
This directly supports autoantibody production as an upstream therapeutic target in AQP4-positive NMOSD.
Blood-Brain Barrier Disruption
Early blood-brain barrier dysfunction permits circulating AQP4 autoantibodies to enter the central nervous system and reach vulnerable perivascular astrocyte endfeet.
regulation of blood-brain barrier permeability link ⚠ ABNORMAL
blood brain barrier link
Show evidence (1 reference)
"At the onset of NMOSD, increased permeability of the BBB causes the entry of circulating AQP4 autoantibodies into the central nervous system (CNS)."
Directly supports barrier disruption as the enabling step for pathogenic anti-AQP4 antibody access to the CNS.
Anti-AQP4 Binding to Perivascular Astrocytes
Pathogenic NMO-IgG binds extracellular AQP4 on perivascular astrocytic endfeet, with higher-order orthogonal arrays of particles increasing antibody avidity and pathogenicity.
astrocyte link
AQP4 link
blood brain barrier link
Show evidence (1 reference)
PMID:35454180 SUPPORT
"In NMOSD, the autoantibody (NMO-IgG) binds to the extracellular loops of AQP4 as expressed in perivascular astrocytic end-feet and disrupts astrocytes in a complement-dependent manner."
Directly supports antibody binding to perivascular astrocytic AQP4 as the initiating lesion in AQP4-positive NMOSD.
Classical Complement Activation on Astrocytes
Anti-AQP4 immune complexes activate the classical complement pathway, generating terminal complement-mediated astrocyte injury and driving the complement-sensitive relapse biology of AQP4-positive disease.
C3 link C5 link
complement activation, classical pathway link
Show evidence (1 reference)
PMID:31050279 SUPPORT
"At least two thirds of cases are associated with aquaporin-4 antibodies (AQP4-IgG) and complement-mediated damage to the central nervous system."
This trial abstract directly frames AQP4-positive NMOSD as a complement-mediated CNS disease.
Complement-Dependent Th17 Cytokine Amplification
AQP4 immune complexes stimulate complement-dependent IL-6 and IL-17A release, reinforcing a Th17-skewed inflammatory program and sustaining relapse-prone neuroinflammation.
T helper 17 cell link
IL6 link
interleukin-6-mediated signaling pathway link T-helper 17 cell differentiation link
Show evidence (1 reference)
"Co-stimulation of PBMCs with AQP4-IgG/AQP4 immunocomplex and complement prompts a Th17-biased response consistent with the inflammatory paradigm observed in NMOSD."
Directly supports complement-dependent IL-6/IL-17 immune amplification downstream of AQP4 immune-complex formation.
Granulocyte-Rich Neuroinflammation
AQP4-IgG-based models reproduce granulocyte and macrophage infiltration, capturing the neutrophil- and eosinophil-rich inflammatory pattern that distinguishes AQP4-positive NMOSD lesions from multiple sclerosis.
neutrophil link eosinophil link macrophage link
Show evidence (1 reference)
DOI:10.4103/nrr.nrr-d-23-01325 SUPPORT Model Organism
"These experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders, such as aquaporin-4 loss, astrocytopathy, granulocyte and macrophage infiltration, complement activation, demyelination, and neuronal loss;"
This directly supports the granulocyte- and macrophage-rich lesion ecology characteristic of AQP4-IgG-positive NMOSD.
Secondary Demyelination and Neuronal Injury
Astrocyte-targeted injury leads secondarily to demyelination and neuronal loss rather than primary oligodendrocyte autoimmunity, explaining the destructive opticospinal phenotype of anti-AQP4 disease.
oligodendrocyte link
myelination link ↕ DYSREGULATED
myelin sheath link
Show evidence (1 reference)
DOI:10.4103/nrr.nrr-d-23-01325 SUPPORT Model Organism
"These experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders, such as aquaporin-4 loss, astrocytopathy, granulocyte and macrophage infiltration, complement activation, demyelination, and neuronal loss;"
Supports the downstream sequence from astrocytopathy to demyelination and neuronal loss in AQP4-positive NMOSD.

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.
Pathograph: causal mechanism network for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies Interactive directed graph showing how pathophysiology mechanisms, phenotypes, genetic factors and variants, experimental models, environmental triggers, and treatments relate through causal and linked edges.

Phenotypes

6
Digestive 1
Area Postrema Syndrome FREQUENT Nausea and vomiting (HP:0002017)
Show evidence (1 reference)
PMID:26092914 SUPPORT
"The core clinical characteristics required for patients with NMOSD with AQP4-IgG include clinical syndromes or MRI findings related to optic nerve, spinal cord, area postrema"
Area postrema syndrome is a core clinical feature in the AQP4-positive diagnostic framework.
Eye 1
Optic Neuritis VERY_FREQUENT Optic neuritis (HP:0100653)
Show evidence (1 reference)
PMID:26092914 SUPPORT
"The core clinical characteristics required for patients with NMOSD with AQP4-IgG include clinical syndromes or MRI findings related to optic nerve, spinal cord, area postrema, other brainstem, diencephalic, or cerebral presentations."
Optic nerve involvement is a core diagnostic manifestation of AQP4-positive NMOSD.
Immune 1
Longitudinally Extensive Transverse Myelitis VERY_FREQUENT Myelitis (HP:0012486)
Extent: EXTENSIVE
HPO lacks a dedicated LETM term, so HP:0012486 is used together with an EXTENSIVE spatial qualifier.
Show evidence (1 reference)
PMID:26092914 SUPPORT
"The core clinical characteristics required for patients with NMOSD with AQP4-IgG include clinical syndromes or MRI findings related to optic nerve, spinal cord, area postrema"
This directly supports spinal cord involvement as a core AQP4-positive NMOSD manifestation.
Constitutional 1
Intractable Hiccups FREQUENT Recurrent singultus (HP:0100247)
Show evidence (1 reference)
PMID:30258024 SUPPORT Human Clinical
"and hiccups (102, 65%) lasted a median of 14 days (2-365)."
This directly supports hiccups as a frequent APS symptom in AQP4-IgG-positive NMOSD.
Other 2
Acute Brainstem Syndrome OCCASIONAL
Show evidence (1 reference)
PMID:26092914 SUPPORT
"The core clinical characteristics required for patients with NMOSD with AQP4-IgG include clinical syndromes or MRI findings related to optic nerve, spinal cord, area postrema, other brainstem, diencephalic, or cerebral presentations."
Other brainstem presentations are explicitly included among the core AQP4-IgG-positive NMOSD clinical characteristics.
Diencephalic Syndrome OCCASIONAL
Show evidence (1 reference)
PMID:26092914 SUPPORT
"The core clinical characteristics required for patients with NMOSD with AQP4-IgG include clinical syndromes or MRI findings related to optic nerve, spinal cord, area postrema, other brainstem, diencephalic, or cerebral presentations."
Diencephalic presentations are explicitly recognized within the AQP4-IgG-positive NMOSD diagnostic criteria.
🧬

Genetic Associations

1
HLA-DRB1*03:01 (Associated)
Show evidence (1 reference)
PMID:33420337 SUPPORT
"The main HLA association with Neuromyelitis Optica was the DRB1*03:01 allele in Western populations and with the DPB1*05:01 allele in Asia."
Supports a reproducible HLA association in NMOSD while keeping the primary disease model centered on anti-AQP4 autoimmunity.
💊

Treatments

3
Eculizumab
Action: Pharmacotherapy NCIT:C15986
Agent: eculizumab
Anti-C5 complement blockade directly targets the complement-dependent astrocytopathic mechanism of anti-AQP4 NMOSD and reduces relapse risk.
Mechanism Target:
INHIBITS Classical Complement Activation on Astrocytes — C5 blockade prevents terminal complement-mediated astrocyte injury in AQP4-IgG-positive disease.
Show evidence (1 reference)
PMID:31050279 SUPPORT
"At least two thirds of cases are associated with aquaporin-4 antibodies (AQP4-IgG) and complement-mediated damage to the central nervous system."
This directly supports complement blockade as a mechanism-matched therapy in AQP4-positive NMOSD.
Show evidence (1 reference)
PMID:31050279 SUPPORT
"Adjudicated relapses occurred in 3 of 96 patients (3%) in the eculizumab group and 20 of 47 (43%) in the placebo group"
The PREVENT trial demonstrates major relapse reduction in AQP4-IgG-positive NMOSD.
Inebilizumab
Action: Pharmacotherapy NCIT:C15986
Agent: inebilizumab
Anti-CD19 B-lineage depletion reduces the cellular source of pathogenic AQP4 autoantibody production and lowers attack risk.
Mechanism Target:
INHIBITS AQP4-Reactive B Cell Autoantibody Production — B-lineage depletion lowers the upstream anti-AQP4 autoantibody burden that drives astrocyte-targeted attacks.
Show evidence (1 reference)
PMID:31495497 SUPPORT
"21 (12%) of 174 participants receiving inebilizumab had an attack versus 22 (39%) of 56 participants receiving placebo"
The N-MOmentum trial supports inebilizumab as effective relapse prevention in anti-AQP4 NMOSD.
Satralizumab
Action: Pharmacotherapy NCIT:C15986
Agent: satralizumab
IL-6 receptor blockade interferes with the cytokine-amplification loop that supports plasmablast survival and Th17-skewed inflammation in anti-AQP4 disease.
Mechanism Target:
INHIBITS Complement-Dependent Th17 Cytokine Amplification — IL-6 receptor blockade counters the inflammatory cytokine program downstream of AQP4 immune-complex signaling.
INHIBITS AQP4-Reactive B Cell Autoantibody Production — IL-6 receptor blockade can also reduce plasmablast survival and upstream AQP4-IgG production.
Show evidence (1 reference)
PMID:36933107 SUPPORT
"Satralizumab (Enspryng®) is a monoclonal antibody that blocks the interleukin-6 (IL-6) receptor and is approved for the treatment of neuromyelitis optica spectrum disorder (NMOSD) in patients who are aquaporin-4 immunoglobulin G (AQP4-IgG) seropositive."
Directly supports IL-6R blockade as a mechanism-matched approved therapy for the anti-AQP4 subtype.
🔀

Differential Diagnoses

2

Conditions with similar clinical presentations that must be differentiated from Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies:

MOG antibody-associated disease
Overlapping Features MOGAD can satisfy NMO/NMOSD criteria but differs from anti-AQP4 disease in sex distribution, imaging patterns, and overall clinical outcome.
Distinguishing Features
  • MOG-antibody-positive disease shows more conus and deep gray matter involvement on MRI.
  • Anti-AQP4-positive patients relapse more often and tend to have less favorable outcomes.
Show evidence (1 reference)
PMID:24425068 SUPPORT
"Despite the fact that patients with MOG-Abs can fulfill the diagnostic criteria for NMO, there are differences when compared with those with AQP4-Abs."
Directly supports MOGAD as a key differential diagnosis that can mimic anti-AQP4 NMOSD while remaining clinically distinct.
Overlapping Features Multiple sclerosis is the classic inflammatory demyelinating differential, but anti-AQP4-seropositive NMOSD is a distinct astrocytopathic syndrome with different serology and lesion biology.
Distinguishing Features
  • Anti-AQP4 seropositivity and area postrema/LETM patterns favor NMOSD over multiple sclerosis.
  • NMOSD is driven by astrocyte-directed autoimmunity rather than primary MS-type demyelinating pathology.
Show evidence (1 reference)
PMID:26092914 SUPPORT
"Neuromyelitis optica (NMO) is an inflammatory CNS syndrome distinct from multiple sclerosis (MS) that is associated with serum aquaporin-4 immunoglobulin G antibodies (AQP4-IgG)."
This directly supports multiple sclerosis as the major diagnostic alternative from which AQP4-positive NMOSD must be separated.
🔬

Clinical Trials

2
NCT01892345
PREVENT randomized trial of eculizumab in AQP4-IgG-positive NMOSD.
Target Phenotypes: optic neuritis myelitis
Show evidence (1 reference)
PMID:31050279 SUPPORT
"Among patients with AQP4-IgG-positive NMOSD, those who received eculizumab had a significantly lower risk of relapse than those who received placebo."
This directly supports PREVENT as a pivotal interventional trial in anti-AQP4 NMOSD.
NCT02200770
Randomized placebo-controlled inebilizumab trial in anti-AQP4-positive NMOSD.
Target Phenotypes: optic neuritis myelitis
Show evidence (1 reference)
PMID:31495497 SUPPORT
"Compared with placebo, inebilizumab reduced the risk of an NMOSD attack."
Supports N-MOmentum as a pivotal disease-modifying trial for anti-AQP4-positive NMOSD.
{ }

Source YAML

click to show
name: Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies
creation_date: "2026-04-23T00:00:00Z"
updated_date: "2026-05-10T14:23:45Z"
category: Neurological Disorder
parents:
- Autoimmune Disorder
- Demyelinating Disease
disease_term:
  preferred_term: neuromyelitis optica spectrum disorder with anti-AQP4 antibodies
  term:
    id: MONDO:0035663
    label: neuromyelitis optica spectrum disorder with anti-AQP4 antibodies
pathophysiology:
- name: AQP4-Reactive B Cell Autoantibody Production
  description: >-
    Peripheral B-lineage cells generate pathogenic AQP4-IgG, creating the
    circulating autoantibody substrate for astrocyte-targeted NMOSD attacks.
  genes:
  - preferred_term: AQP4
    term:
      id: hgnc:637
      label: AQP4
  cell_types:
  - preferred_term: B cell
    term:
      id: CL:0000236
      label: B cell
  - preferred_term: plasma cell
    term:
      id: CL:0000786
      label: plasma cell
  - preferred_term: plasmablast
    term:
      id: CL:0000980
      label: plasmablast
  evidence:
  - reference: PMID:31495497
    reference_title: "Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised placebo-controlled phase 2/3 trial."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      of inebilizumab, an anti-CD19, B cell-depleting antibody, in reducing
      the risk of attacks and disability in NMOSD.
    explanation: >-
      This supports B-lineage cells as a therapeutically relevant upstream
      driver of NMOSD attacks.
  - reference: PMID:36933107
    reference_title: "Satralizumab: A Review in Neuromyelitis Optica Spectrum Disorder."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      which is designed to suppress autoantibody production by blocking the
      interleukin-6 (IL-6) receptor
    explanation: >-
      This directly supports autoantibody production as an upstream
      therapeutic target in AQP4-positive NMOSD.
  downstream:
  - target: Blood-Brain Barrier Disruption
    description: Circulating AQP4-IgG requires CNS access through barrier-vulnerable sites or BBB disruption.
  - target: Anti-AQP4 Binding to Perivascular Astrocytes
    description: AQP4-IgG production provides the antibody substrate for astrocyte binding.
- name: Blood-Brain Barrier Disruption
  description: >-
    Early blood-brain barrier dysfunction permits circulating AQP4
    autoantibodies to enter the central nervous system and reach vulnerable
    perivascular astrocyte endfeet.
  locations:
  - preferred_term: blood brain barrier
    term:
      id: UBERON:0000120
      label: blood brain barrier
  biological_processes:
  - preferred_term: regulation of blood-brain barrier permeability
    term:
      id: GO:1905603
      label: regulation of blood-brain barrier permeability
    modifier: ABNORMAL
  evidence:
  - reference: DOI:10.3390/ijms251910625
    reference_title: Blood–Brain Barrier Disruption in Neuroimmunological Disease
    supports: SUPPORT
    snippet: >-
      At the onset of NMOSD, increased permeability of the BBB causes the
      entry of circulating AQP4 autoantibodies into the central nervous
      system (CNS).
    explanation: >-
      Directly supports barrier disruption as the enabling step for
      pathogenic anti-AQP4 antibody access to the CNS.
  downstream:
  - target: Anti-AQP4 Binding to Perivascular Astrocytes
    description: Barrier leak enables circulating anti-AQP4 antibodies to engage astrocytic targets.
- name: Anti-AQP4 Binding to Perivascular Astrocytes
  description: >-
    Pathogenic NMO-IgG binds extracellular AQP4 on perivascular astrocytic
    endfeet, with higher-order orthogonal arrays of particles increasing
    antibody avidity and pathogenicity.
  genes:
  - preferred_term: AQP4
    term:
      id: hgnc:637
      label: AQP4
  cell_types:
  - preferred_term: astrocyte
    term:
      id: CL:0000127
      label: astrocyte
  locations:
  - preferred_term: blood brain barrier
    term:
      id: UBERON:0000120
      label: blood brain barrier
  evidence:
  - reference: PMID:35454180
    reference_title: "Aquaporin-4 in Neuromyelitis Optica Spectrum Disorders: A Target of Autoimmunity in the Central Nervous System."
    supports: SUPPORT
    snippet: >-
      In NMOSD, the autoantibody (NMO-IgG) binds to the extracellular loops
      of AQP4 as expressed in perivascular astrocytic end-feet and disrupts
      astrocytes in a complement-dependent manner.
    explanation: >-
      Directly supports antibody binding to perivascular astrocytic AQP4 as
      the initiating lesion in AQP4-positive NMOSD.
  downstream:
  - target: Classical Complement Activation on Astrocytes
    description: Antibody-coated astrocytes become substrates for complement-mediated injury.
  - target: Secondary Demyelination and Neuronal Injury
    description: Astrocyte dysfunction disrupts homeostatic support for oligodendrocytes and neurons.
- name: Classical Complement Activation on Astrocytes
  description: >-
    Anti-AQP4 immune complexes activate the classical complement pathway,
    generating terminal complement-mediated astrocyte injury and driving the
    complement-sensitive relapse biology of AQP4-positive disease.
  genes:
  - preferred_term: C3
    term:
      id: hgnc:1318
      label: C3
  - preferred_term: C5
    term:
      id: hgnc:1331
      label: C5
  biological_processes:
  - preferred_term: complement activation, classical pathway
    term:
      id: GO:0006958
      label: complement activation, classical pathway
  evidence:
  - reference: PMID:31050279
    reference_title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
    supports: SUPPORT
    snippet: >-
      At least two thirds of cases are associated with aquaporin-4
      antibodies (AQP4-IgG) and complement-mediated damage to the central
      nervous system.
    explanation: >-
      This trial abstract directly frames AQP4-positive NMOSD as a
      complement-mediated CNS disease.
  downstream:
  - target: Complement-Dependent Th17 Cytokine Amplification
    description: Complement effector activity amplifies downstream cytokine and immune-cell responses.
  - target: Secondary Demyelination and Neuronal Injury
    description: Complement-mediated astrocyte loss propagates tissue-destructive downstream injury.
- name: Complement-Dependent Th17 Cytokine Amplification
  description: >-
    AQP4 immune complexes stimulate complement-dependent IL-6 and IL-17A
    release, reinforcing a Th17-skewed inflammatory program and sustaining
    relapse-prone neuroinflammation.
  genes:
  - preferred_term: IL6
    term:
      id: hgnc:6018
      label: IL6
  cell_types:
  - preferred_term: T helper 17 cell
    term:
      id: CL:0000899
      label: T-helper 17 cell
  biological_processes:
  - preferred_term: interleukin-6-mediated signaling pathway
    term:
      id: GO:0070102
      label: interleukin-6-mediated signaling pathway
  - preferred_term: T-helper 17 cell differentiation
    term:
      id: GO:0072539
      label: T-helper 17 cell differentiation
  evidence:
  - reference: DOI:10.1038/s41598-024-53661-5
    reference_title: Anti-aquaporin-4 immune complex stimulates complement-dependent Th17 cytokine release in neuromyelitis optica spectrum disorders
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: >-
      Co-stimulation of PBMCs with AQP4-IgG/AQP4 immunocomplex and
      complement prompts a Th17-biased response consistent with the
      inflammatory paradigm observed in NMOSD.
    explanation: >-
      Directly supports complement-dependent IL-6/IL-17 immune amplification
      downstream of AQP4 immune-complex formation.
  downstream:
  - target: Granulocyte-Rich Neuroinflammation
    description: Th17-skewed cytokine signaling promotes further innate immune recruitment and lesion propagation.
- name: Granulocyte-Rich Neuroinflammation
  description: >-
    AQP4-IgG-based models reproduce granulocyte and macrophage infiltration,
    capturing the neutrophil- and eosinophil-rich inflammatory pattern that
    distinguishes AQP4-positive NMOSD lesions from multiple sclerosis.
  cell_types:
  - preferred_term: neutrophil
    term:
      id: CL:0000775
      label: neutrophil
  - preferred_term: eosinophil
    term:
      id: CL:0000771
      label: eosinophil
  - preferred_term: macrophage
    term:
      id: CL:0000235
      label: macrophage
  evidence:
  - reference: DOI:10.4103/nrr.nrr-d-23-01325
    reference_title: "Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders: progress of experimental models based on disease pathogenesis"
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: >-
      These experimental models have successfully simulated many
      pathological features of neuromyelitis optica spectrum disorders,
      such as aquaporin-4 loss, astrocytopathy, granulocyte and macrophage
      infiltration, complement activation, demyelination, and neuronal loss;
    explanation: >-
      This directly supports the granulocyte- and macrophage-rich lesion
      ecology characteristic of AQP4-IgG-positive NMOSD.
  downstream:
  - target: Optic Neuritis
    description: Inflammatory astrocytopathy and demyelination frequently affect the optic nerves.
  - target: Longitudinally Extensive Transverse Myelitis
    description: Granulocyte-rich inflammatory lesions in the spinal cord produce LETM.
  - target: Area Postrema Syndrome
    description: Barrier-vulnerable brainstem regions such as the area postrema are frequent symptomatic targets.
- name: Secondary Demyelination and Neuronal Injury
  description: >-
    Astrocyte-targeted injury leads secondarily to demyelination and neuronal
    loss rather than primary oligodendrocyte autoimmunity, explaining the
    destructive opticospinal phenotype of anti-AQP4 disease.
  cell_types:
  - preferred_term: oligodendrocyte
    term:
      id: CL:0000128
      label: oligodendrocyte
  biological_processes:
  - preferred_term: myelination
    term:
      id: GO:0042552
      label: myelination
    modifier: DYSREGULATED
  cellular_components:
  - preferred_term: myelin sheath
    term:
      id: GO:0043209
      label: myelin sheath
  evidence:
  - reference: DOI:10.4103/nrr.nrr-d-23-01325
    reference_title: "Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders: progress of experimental models based on disease pathogenesis"
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: >-
      These experimental models have successfully simulated many
      pathological features of neuromyelitis optica spectrum disorders,
      such as aquaporin-4 loss, astrocytopathy, granulocyte and macrophage
      infiltration, complement activation, demyelination, and neuronal loss;
    explanation: >-
      Supports the downstream sequence from astrocytopathy to demyelination
      and neuronal loss in AQP4-positive NMOSD.
  downstream:
  - target: Optic Neuritis
    description: Secondary demyelinating injury in the optic pathways drives visual attacks.
  - target: Longitudinally Extensive Transverse Myelitis
    description: Destructive demyelination in the spinal cord produces LETM and severe myelopathic disability.
phenotypes:
- name: Optic Neuritis
  description: >-
    Acute, often severe optic nerve inflammation causing visual loss and pain,
    frequently with bilateral or highly disabling attacks in AQP4-positive disease.
  frequency: VERY_FREQUENT
  phenotype_term:
    preferred_term: optic neuritis
    term:
      id: HP:0100653
      label: Optic neuritis
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema, other brainstem,
      diencephalic, or cerebral presentations.
    explanation: >-
      Optic nerve involvement is a core diagnostic manifestation of
      AQP4-positive NMOSD.
- name: Longitudinally Extensive Transverse Myelitis
  description: >-
    Long spinal cord lesions spanning three or more vertebral segments are a
    hallmark attack pattern in anti-AQP4 NMOSD and often drive severe motor,
    sensory, and sphincter deficits.
  frequency: VERY_FREQUENT
  phenotype_term:
    preferred_term: longitudinally extensive transverse myelitis
    term:
      id: HP:0012486
      label: Myelitis
    spatial_extent: EXTENSIVE
  notes: >-
    HPO lacks a dedicated LETM term, so HP:0012486 is used together with an
    EXTENSIVE spatial qualifier.
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema
    explanation: >-
      This directly supports spinal cord involvement as a core AQP4-positive
      NMOSD manifestation.
- name: Area Postrema Syndrome
  description: >-
    Intractable nausea, vomiting, and hiccups caused by lesions in the area
    postrema, a barrier-vulnerable circumventricular region that is highly
    characteristic of AQP4-positive NMOSD.
  frequency: FREQUENT
  phenotype_term:
    preferred_term: nausea and vomiting
    term:
      id: HP:0002017
      label: Nausea and vomiting
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema
    explanation: >-
      Area postrema syndrome is a core clinical feature in the AQP4-positive
      diagnostic framework.
- name: Intractable Hiccups
  description: >-
    Intractable hiccups are a frequent component of area postrema syndrome in
    AQP4-IgG-positive NMOSD.
  frequency: FREQUENT
  phenotype_term:
    preferred_term: intractable hiccups
    term:
      id: HP:0100247
      label: Recurrent singultus
  evidence:
  - reference: PMID:30258024
    reference_title: "Area postrema syndrome: Frequency, criteria, and severity in AQP4-IgG-positive NMOSD."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      and hiccups (102, 65%) lasted a median of 14 days (2-365).
    explanation: >-
      This directly supports hiccups as a frequent APS symptom in
      AQP4-IgG-positive NMOSD.
- name: Acute Brainstem Syndrome
  description: >-
    Brainstem attacks can produce diplopia, dysphagia, and other focal
    cranial-nerve or long-tract symptoms in anti-AQP4 NMOSD.
  frequency: OCCASIONAL
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema, other brainstem,
      diencephalic, or cerebral presentations.
    explanation: >-
      Other brainstem presentations are explicitly included among the core
      AQP4-IgG-positive NMOSD clinical characteristics.
- name: Diencephalic Syndrome
  description: >-
    Diencephalic involvement can produce hypothalamic or endocrine symptoms
    in a subset of patients with anti-AQP4 disease.
  frequency: OCCASIONAL
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema, other brainstem,
      diencephalic, or cerebral presentations.
    explanation: >-
      Diencephalic presentations are explicitly recognized within the
      AQP4-IgG-positive NMOSD diagnostic criteria.
diagnosis:
- name: Serum AQP4-IgG testing
  description: >-
    Detection of serum AQP4-IgG defines the seropositive subtype and is the
    central laboratory procedure distinguishing this disorder from other
    inflammatory demyelinating diseases.
  results: >-
    A positive serum AQP4-IgG assay supports the diagnosis of anti-AQP4
    NMOSD and anchors serostatus-specific interpretation of core syndromes.
  diagnosis_term:
    preferred_term: diagnostic procedure
    term:
      id: MAXO:0000003
      label: diagnostic procedure
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The new nomenclature defines the unifying term NMO spectrum disorders
      (NMOSD), which is stratified further by serologic testing (NMOSD with
      or without AQP4-IgG).
    explanation: >-
      This directly supports serologic AQP4-IgG testing as the basis for
      subtype-defining diagnostic stratification.
  - reference: PMID:35454180
    reference_title: "Aquaporin-4 in Neuromyelitis Optica Spectrum Disorders: A Target of Autoimmunity in the Central Nervous System."
    supports: SUPPORT
    snippet: >-
      NMO-IgG is an excellent marker for distinguishing the disease from
      other inflammatory demyelinating diseases, such as multiple sclerosis.
    explanation: >-
      This directly supports AQP4 autoantibody testing as a differentiating
      diagnostic assay.
- name: MRI of optic pathways, spinal cord, and brainstem
  description: >-
    MRI is used to document lesion localization in the optic nerves, spinal
    cord, area postrema, brainstem, and diencephalon within the AQP4-IgG
    diagnostic framework.
  results: >-
    MRI patterns involving the optic nerve, spinal cord, area postrema,
    brainstem, diencephalon, or cerebrum support diagnosis in the correct
    serologic context.
  diagnosis_term:
    preferred_term: magnetic resonance imaging procedure
    term:
      id: MAXO:0000424
      label: magnetic resonance imaging procedure
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      The core clinical characteristics required for patients with NMOSD
      with AQP4-IgG include clinical syndromes or MRI findings related to
      optic nerve, spinal cord, area postrema, other brainstem,
      diencephalic, or cerebral presentations.
    explanation: >-
      This directly supports MRI as a central diagnostic modality for
      lesion-pattern confirmation in AQP4-positive NMOSD.
differential_diagnoses:
- name: MOG antibody-associated disease
  description: >-
    MOGAD can satisfy NMO/NMOSD criteria but differs from anti-AQP4 disease in
    sex distribution, imaging patterns, and overall clinical outcome.
  distinguishing_features:
  - MOG-antibody-positive disease shows more conus and deep gray matter involvement on MRI.
  - Anti-AQP4-positive patients relapse more often and tend to have less favorable outcomes.
  evidence:
  - reference: PMID:24425068
    reference_title: "Neuromyelitis optica spectrum disorders with aquaporin-4 and myelin-oligodendrocyte glycoprotein antibodies: a comparative study."
    supports: SUPPORT
    snippet: >-
      Despite the fact that patients with MOG-Abs can fulfill the
      diagnostic criteria for NMO, there are differences when compared with
      those with AQP4-Abs.
    explanation: >-
      Directly supports MOGAD as a key differential diagnosis that can mimic
      anti-AQP4 NMOSD while remaining clinically distinct.
- name: Multiple sclerosis
  description: >-
    Multiple sclerosis is the classic inflammatory demyelinating differential,
    but anti-AQP4-seropositive NMOSD is a distinct astrocytopathic syndrome
    with different serology and lesion biology.
  distinguishing_features:
  - Anti-AQP4 seropositivity and area postrema/LETM patterns favor NMOSD over multiple sclerosis.
  - NMOSD is driven by astrocyte-directed autoimmunity rather than primary MS-type demyelinating pathology.
  evidence:
  - reference: PMID:26092914
    reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
    supports: SUPPORT
    snippet: >-
      Neuromyelitis optica (NMO) is an inflammatory CNS syndrome distinct
      from multiple sclerosis (MS) that is associated with serum
      aquaporin-4 immunoglobulin G antibodies (AQP4-IgG).
    explanation: >-
      This directly supports multiple sclerosis as the major diagnostic
      alternative from which AQP4-positive NMOSD must be separated.
genetic:
- name: HLA-DRB1*03:01
  association: Associated
  notes: >-
    HLA class II association supports an adaptive immune predisposition but is
    not itself the disease-defining lesion in anti-AQP4 NMOSD.
  evidence:
  - reference: PMID:33420337
    reference_title: "Neuromyelitis optica is an HLA associated disease different from Multiple Sclerosis: a systematic review with meta-analysis."
    supports: SUPPORT
    snippet: >-
      The main HLA association with Neuromyelitis Optica was the DRB1*03:01
      allele in Western populations and with the DPB1*05:01 allele in Asia.
    explanation: >-
      Supports a reproducible HLA association in NMOSD while keeping the
      primary disease model centered on anti-AQP4 autoimmunity.
treatments:
- name: Eculizumab
  description: >-
    Anti-C5 complement blockade directly targets the complement-dependent
    astrocytopathic mechanism of anti-AQP4 NMOSD and reduces relapse risk.
  treatment_term:
    preferred_term: Pharmacotherapy
    term:
      id: NCIT:C15986
      label: Pharmacotherapy
    therapeutic_agent:
    - preferred_term: eculizumab
      term:
        id: NCIT:C48386
        label: Eculizumab
  target_mechanisms:
  - target: Classical Complement Activation on Astrocytes
    treatment_effect: INHIBITS
    description: >-
      C5 blockade prevents terminal complement-mediated astrocyte injury in
      AQP4-IgG-positive disease.
    evidence:
    - reference: PMID:31050279
      reference_title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
      supports: SUPPORT
      snippet: >-
        At least two thirds of cases are associated with aquaporin-4
        antibodies (AQP4-IgG) and complement-mediated damage to the
        central nervous system.
      explanation: >-
        This directly supports complement blockade as a mechanism-matched
        therapy in AQP4-positive NMOSD.
  evidence:
  - reference: PMID:31050279
    reference_title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
    supports: SUPPORT
    snippet: >-
      Adjudicated relapses occurred in 3 of 96 patients (3%) in the
      eculizumab group and 20 of 47 (43%) in the placebo group
    explanation: >-
      The PREVENT trial demonstrates major relapse reduction in
      AQP4-IgG-positive NMOSD.
- name: Inebilizumab
  description: >-
    Anti-CD19 B-lineage depletion reduces the cellular source of pathogenic
    AQP4 autoantibody production and lowers attack risk.
  treatment_term:
    preferred_term: Pharmacotherapy
    term:
      id: NCIT:C15986
      label: Pharmacotherapy
    therapeutic_agent:
    - preferred_term: inebilizumab
      term:
        id: NCIT:C88283
        label: Inebilizumab
  target_mechanisms:
  - target: AQP4-Reactive B Cell Autoantibody Production
    treatment_effect: INHIBITS
    description: >-
      B-lineage depletion lowers the upstream anti-AQP4 autoantibody burden
      that drives astrocyte-targeted attacks.
  evidence:
  - reference: PMID:31495497
    reference_title: "Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised placebo-controlled phase 2/3 trial."
    supports: SUPPORT
    snippet: >-
      21 (12%) of 174 participants receiving inebilizumab had an attack
      versus 22 (39%) of 56 participants receiving placebo
    explanation: >-
      The N-MOmentum trial supports inebilizumab as effective relapse
      prevention in anti-AQP4 NMOSD.
- name: Satralizumab
  description: >-
    IL-6 receptor blockade interferes with the cytokine-amplification loop
    that supports plasmablast survival and Th17-skewed inflammation in
    anti-AQP4 disease.
  treatment_term:
    preferred_term: Pharmacotherapy
    term:
      id: NCIT:C15986
      label: Pharmacotherapy
    therapeutic_agent:
    - preferred_term: satralizumab
      term:
        id: NCIT:C152307
        label: Satralizumab
  target_mechanisms:
  - target: Complement-Dependent Th17 Cytokine Amplification
    treatment_effect: INHIBITS
    description: >-
      IL-6 receptor blockade counters the inflammatory cytokine program
      downstream of AQP4 immune-complex signaling.
  - target: AQP4-Reactive B Cell Autoantibody Production
    treatment_effect: INHIBITS
    description: >-
      IL-6 receptor blockade can also reduce plasmablast survival and
      upstream AQP4-IgG production.
  evidence:
  - reference: PMID:36933107
    reference_title: "Satralizumab: A Review in Neuromyelitis Optica Spectrum Disorder."
    supports: SUPPORT
    snippet: >-
      Satralizumab (Enspryng®) is a monoclonal antibody that blocks the
      interleukin-6 (IL-6) receptor and is approved for the treatment of
      neuromyelitis optica spectrum disorder (NMOSD) in patients who are
      aquaporin-4 immunoglobulin G (AQP4-IgG) seropositive.
    explanation: >-
      Directly supports IL-6R blockade as a mechanism-matched approved
      therapy for the anti-AQP4 subtype.
clinical_trials:
- name: NCT01892345
  description: >-
    PREVENT randomized trial of eculizumab in AQP4-IgG-positive NMOSD.
  target_phenotypes:
  - preferred_term: optic neuritis
    term:
      id: HP:0100653
      label: Optic neuritis
  - preferred_term: myelitis
    term:
      id: HP:0012486
      label: Myelitis
  evidence:
  - reference: PMID:31050279
    reference_title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
    supports: SUPPORT
    snippet: >-
      Among patients with AQP4-IgG-positive NMOSD, those who received
      eculizumab had a significantly lower risk of relapse than those who
      received placebo.
    explanation: >-
      This directly supports PREVENT as a pivotal interventional trial in
      anti-AQP4 NMOSD.
- name: NCT02200770
  description: >-
    Randomized placebo-controlled inebilizumab trial in anti-AQP4-positive
    NMOSD.
  target_phenotypes:
  - preferred_term: optic neuritis
    term:
      id: HP:0100653
      label: Optic neuritis
  - preferred_term: myelitis
    term:
      id: HP:0012486
      label: Myelitis
  evidence:
  - reference: PMID:31495497
    reference_title: "Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised placebo-controlled phase 2/3 trial."
    supports: SUPPORT
    snippet: >-
      Compared with placebo, inebilizumab reduced the risk of an NMOSD
      attack.
    explanation: >-
      Supports N-MOmentum as a pivotal disease-modifying trial for
      anti-AQP4-positive NMOSD.
datasets: []
references:
- reference: PMID:26092914
  title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
  findings:
  - statement: '2015 Jul 14;85(2):177-89. doi: 10.1212/WNL.0000000000001729.'
    supporting_text: '2015 Jul 14;85(2):177-89. doi: 10.1212/WNL.0000000000001729.'
    evidence:
    - reference: PMID:26092914
      reference_title: International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
      supports: SUPPORT
      evidence_source: OTHER
      snippet: '2015 Jul 14;85(2):177-89. doi: 10.1212/WNL.0000000000001729.'
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
- reference: PMID:30258024
  title: "Area postrema syndrome: Frequency, criteria, and severity in AQP4-IgG-positive NMOSD."
  findings: []
- reference: PMID:24425068
  title: "Neuromyelitis optica spectrum disorders with aquaporin-4 and myelin-oligodendrocyte glycoprotein antibodies: a comparative study."
  findings: []
- reference: PMID:31050279
  title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
  findings:
  - statement: Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord.
    supporting_text: Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord.
    evidence:
    - reference: PMID:31050279
      reference_title: Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
- reference: PMID:31495497
  title: "Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised placebo-controlled phase 2/3 trial."
  findings: []
- reference: PMID:33420337
  title: "Neuromyelitis optica is an HLA associated disease different from Multiple Sclerosis: a systematic review with meta-analysis."
  findings: []
- reference: PMID:35454180
  title: "Aquaporin-4 in Neuromyelitis Optica Spectrum Disorders: A Target of Autoimmunity in the Central Nervous System."
  findings: []
- reference: PMID:36933107
  title: "Satralizumab: A Review in Neuromyelitis Optica Spectrum Disorder."
  findings: []
- reference: DOI:10.1038/s41598-024-53661-5
  title: Anti-aquaporin-4 immune complex stimulates complement-dependent Th17 cytokine release in neuromyelitis optica spectrum disorders
  findings:
  - statement: 'Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD).'
    supporting_text: 'Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD).'
    evidence:
    - reference: DOI:10.1038/s41598-024-53661-5
      reference_title: Anti-aquaporin-4 immune complex stimulates complement-dependent Th17 cytokine release in neuromyelitis optica spectrum disorders
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: 'Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD).'
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
- reference: DOI:10.3390/ijms251910625
  title: Blood–Brain Barrier Disruption in Neuroimmunological Disease
  findings: []
- reference: DOI:10.4103/nrr.nrr-d-23-01325
  title: "Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders: progress of experimental models based on disease pathogenesis"
  findings:
  - statement: Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction.
    supporting_text: Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction.
    evidence:
    - reference: DOI:10.4103/nrr.nrr-d-23-01325
      reference_title: 'Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders: progress of experimental models based on disease pathogenesis'
      supports: SUPPORT
      evidence_source: MODEL_ORGANISM
      snippet: Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
- reference: DOI:10.1007/s00415-024-12452-8
  title: 'Sex ratio and age of onset in AQP4 antibody-associated NMOSD: a review and meta-analysis'
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system.
    supporting_text: Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system.
    evidence:
    - reference: DOI:10.1007/s00415-024-12452-8
      reference_title: 'Sex ratio and age of onset in AQP4 antibody-associated NMOSD: a review and meta-analysis'
      supports: SUPPORT
      evidence_source: OTHER
      snippet: Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.1007/s11940-021-00667-3
  title: New Therapeutic Landscape in Neuromyelitis Optica
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: New Therapeutic Landscape in Neuromyelitis Optica
    supporting_text: New Therapeutic Landscape in Neuromyelitis Optica
- reference: DOI:10.1007/s40120-024-00597-7
  title: Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder
    supporting_text: Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder
- reference: DOI:10.1007/s40265-018-1039-7
  title: 'Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options'
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: 'Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options'
    supporting_text: 'Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options'
- reference: DOI:10.1016/j.msard.2024.105522
  title: Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia
    supporting_text: Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia
- reference: DOI:10.1016/j.neurol.2016.03.003
  title: 'Neuromyelitis optica spectrum disorder (NMOSD): A new concept'
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: 'Neuromyelitis optica spectrum disorder (NMOSD): A new concept'
    supporting_text: 'Neuromyelitis optica spectrum disorder (NMOSD): A new concept'
- reference: DOI:10.1056/nejmoa1901747
  title: Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder
    supporting_text: Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder
- reference: DOI:10.1080/14712598.2020.1749259
  title: Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders
    supporting_text: Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders
- reference: DOI:10.1093/brain/awad373
  title: Interferon-γ controls aquaporin 4-specific Th17 and B cells in neuromyelitis optica spectrum disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Interferon-γ controls aquaporin 4-specific Th17 and B cells in neuromyelitis optica spectrum disorder
    supporting_text: Neuromyelitis optica spectrum disorder (NMOSD) is a CNS autoimmune inflammatory disease mediated by T helper 17 (Th17) and antibody responses to the water channel protein, aquaporin 4 (AQP4), and associated with astrocytopathy, demyelination and axonal loss.
    evidence:
    - reference: DOI:10.1093/brain/awad373
      reference_title: Interferon-γ controls aquaporin 4-specific Th17 and B cells in neuromyelitis optica spectrum disorder
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: Neuromyelitis optica spectrum disorder (NMOSD) is a CNS autoimmune inflammatory disease mediated by T helper 17 (Th17) and antibody responses to the water channel protein, aquaporin 4 (AQP4), and associated with astrocytopathy, demyelination and axonal loss.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.1097/wno.0000000000000396
  title: 'Finding NMO: The Evolving Diagnostic Criteria of Neuromyelitis Optica'
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord.
    supporting_text: Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord.
    evidence:
    - reference: DOI:10.1097/wno.0000000000000396
      reference_title: 'Finding NMO: The Evolving Diagnostic Criteria of Neuromyelitis Optica'
      supports: SUPPORT
      evidence_source: OTHER
      snippet: Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.1186/s12974-021-02249-1
  title: 'Neuromyelitis optica spectrum disorders: from pathophysiology to therapeutic strategies'
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM).
    supporting_text: Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM).
    evidence:
    - reference: DOI:10.1186/s12974-021-02249-1
      reference_title: 'Neuromyelitis optica spectrum disorders: from pathophysiology to therapeutic strategies'
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM).
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.1212/nxi.0000000000000134
  title: Update on biomarkers in neuromyelitis optica
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Update on biomarkers in neuromyelitis optica
    supporting_text: Update on biomarkers in neuromyelitis optica
- reference: DOI:10.1212/nxi.0000000000000837
  title: Treatment and outcome of aquaporin-4 antibody–positive NMOSD
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Treatment and outcome of aquaporin-4 antibody–positive NMOSD
    supporting_text: Treatment and outcome of aquaporin-4 antibody–positive NMOSD
- reference: DOI:10.1212/wnl.0000000000002655
  title: Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder
    supporting_text: Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder
- reference: DOI:10.1212/wnl.0000000000209888
  title: Eculizumab Use in Neuromyelitis Optica Spectrum Disorders
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Eculizumab Use in Neuromyelitis Optica Spectrum Disorders
    supporting_text: Eculizumab Use in Neuromyelitis Optica Spectrum Disorders
- reference: DOI:10.3389/fneur.2024.1332890
  title: Immediate and sustained terminal complement inhibition with ravulizumab in patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Immediate and sustained terminal complement inhibition with ravulizumab in patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorder
    supporting_text: To assess the pharmacokinetics and pharmacodynamics of the long-acting terminal complement 5 (C5) inhibitor ravulizumab in adults with anti-aquaporin-4 antibody-positive (AQP4+) neuromyelitis optica spectrum disorder (NMOSD) in the phase 3, open-label CHAMPION-NMOSD trial (NCT04201262).MethodsPatients aged 18 years or older received a weight-based intravenous loading dose of ravulizumab (2,400–3,000 mg) on day 1, followed by weight-based maintenance doses (3,000–3,600 mg) on day 15 and once every 8 weeks thereafter.
    evidence:
    - reference: DOI:10.3389/fneur.2024.1332890
      reference_title: Immediate and sustained terminal complement inhibition with ravulizumab in patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorder
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: To assess the pharmacokinetics and pharmacodynamics of the long-acting terminal complement 5 (C5) inhibitor ravulizumab in adults with anti-aquaporin-4 antibody-positive (AQP4+) neuromyelitis optica spectrum disorder (NMOSD) in the phase 3, open-label CHAMPION-NMOSD trial (NCT04201262).MethodsPatients aged 18 years or older received a weight-based intravenous loading dose of ravulizumab (2,400–3,000 mg) on day 1, followed by weight-based maintenance doses (3,000–3,600 mg) on day 15 and once every 8 weeks thereafter.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.3390/ijms17030273
  title: The Immunology of Neuromyelitis Optica—Current Knowledge, Clinical Implications, Controversies and Future Perspectives
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks.
    supporting_text: Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks.
    evidence:
    - reference: DOI:10.3390/ijms17030273
      reference_title: The Immunology of Neuromyelitis Optica—Current Knowledge, Clinical Implications, Controversies and Future Perspectives
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.3390/ijms22168638
  title: Treatment of Neuromyelitis Optica Spectrum Disorders
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality.
    supporting_text: Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality.
    evidence:
    - reference: DOI:10.3390/ijms22168638
      reference_title: Treatment of Neuromyelitis Optica Spectrum Disorders
      supports: SUPPORT
      evidence_source: OTHER
      snippet: Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality.
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
- reference: DOI:10.3390/ijms25158169
  title: Humanized-Aquaporin-4-Expressing Rat Created by Gene-Editing Technology and Its Use to Clarify the Pathology of Neuromyelitis Optica Spectrum Disorder
  found_in:
  - Neuromyelitis_Optica_Spectrum_Disorder_with_Anti-AQP4_Antibodies-deep-research-falcon.md
  findings:
  - statement: Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs).
    supporting_text: Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs).
    evidence:
    - reference: DOI:10.3390/ijms25158169
      reference_title: Humanized-Aquaporin-4-Expressing Rat Created by Gene-Editing Technology and Its Use to Clarify the Pathology of Neuromyelitis Optica Spectrum Disorder
      supports: SUPPORT
      evidence_source: MODEL_ORGANISM
      snippet: Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs).
      explanation: Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
📚

References & Deep Research

References

30
International consensus diagnostic criteria for neuromyelitis optica spectrum disorders.
1 finding
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"2015 Jul 14;85(2):177-89. doi: 10.1212/WNL.0000000000001729."
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PMID:26092914 SUPPORT Other
"2015 Jul 14;85(2):177-89. doi: 10.1212/WNL.0000000000001729."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Area postrema syndrome: Frequency, criteria, and severity in AQP4-IgG-positive NMOSD.
No top-level findings curated for this source.
Neuromyelitis optica spectrum disorders with aquaporin-4 and myelin-oligodendrocyte glycoprotein antibodies: a comparative study.
No top-level findings curated for this source.
Eculizumab in Aquaporin-4-Positive Neuromyelitis Optica Spectrum Disorder.
1 finding
Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord.
"Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord."
Show evidence (1 reference)
PMID:31050279 SUPPORT Human Clinical
"Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing, autoimmune, inflammatory disorder that typically affects the optic nerves and spinal cord."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised placebo-controlled phase 2/3 trial.
No top-level findings curated for this source.
Neuromyelitis optica is an HLA associated disease different from Multiple Sclerosis: a systematic review with meta-analysis.
No top-level findings curated for this source.
Aquaporin-4 in Neuromyelitis Optica Spectrum Disorders: A Target of Autoimmunity in the Central Nervous System.
No top-level findings curated for this source.
Satralizumab: A Review in Neuromyelitis Optica Spectrum Disorder.
No top-level findings curated for this source.
Anti-aquaporin-4 immune complex stimulates complement-dependent Th17 cytokine release in neuromyelitis optica spectrum disorders
1 finding
Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD).
"Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD)."
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DOI:10.1038/s41598-024-53661-5 SUPPORT Human Clinical
"Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD)."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Blood–Brain Barrier Disruption in Neuroimmunological Disease
No top-level findings curated for this source.
Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders: progress of experimental models based on disease pathogenesis
1 finding
Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction.
"Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction."
Show evidence (1 reference)
DOI:10.4103/nrr.nrr-d-23-01325 SUPPORT Model Organism
"Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor dysfunction."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Sex ratio and age of onset in AQP4 antibody-associated NMOSD: a review and meta-analysis
1 finding
Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system.
"Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system."
Show evidence (1 reference)
"Aquaporin-4 (AQP4) antibody-associated neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated inflammatory disease of the central nervous system."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
New Therapeutic Landscape in Neuromyelitis Optica
1 finding
New Therapeutic Landscape in Neuromyelitis Optica
"New Therapeutic Landscape in Neuromyelitis Optica"
Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder
1 finding
Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder
"Network Meta-analysis of Ravulizumab and Alternative Interventions for the Treatment of Neuromyelitis Optica Spectrum Disorder"
Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options
1 finding
Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options
"Pharmacotherapy for Neuromyelitis Optica Spectrum Disorders: Current Management and Future Options"
Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia
1 finding
Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia
"Epidemiology of aquaporin-4-IgG-positive NMOSD in Sardinia"
Neuromyelitis optica spectrum disorder (NMOSD): A new concept
1 finding
Neuromyelitis optica spectrum disorder (NMOSD): A new concept
"Neuromyelitis optica spectrum disorder (NMOSD): A new concept"
Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder
1 finding
Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder
"Trial of Satralizumab in Neuromyelitis Optica Spectrum Disorder"
Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders
1 finding
Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders
"Current and emerging biologics for the treatment of neuromyelitis optica spectrum disorders"
Interferon-γ controls aquaporin 4-specific Th17 and B cells in neuromyelitis optica spectrum disorder
1 finding
Interferon-γ controls aquaporin 4-specific Th17 and B cells in neuromyelitis optica spectrum disorder
"Neuromyelitis optica spectrum disorder (NMOSD) is a CNS autoimmune inflammatory disease mediated by T helper 17 (Th17) and antibody responses to the water channel protein, aquaporin 4 (AQP4), and associated with astrocytopathy, demyelination and axonal loss."
Show evidence (1 reference)
DOI:10.1093/brain/awad373 SUPPORT Human Clinical
"Neuromyelitis optica spectrum disorder (NMOSD) is a CNS autoimmune inflammatory disease mediated by T helper 17 (Th17) and antibody responses to the water channel protein, aquaporin 4 (AQP4), and associated with astrocytopathy, demyelination and axonal loss."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Finding NMO: The Evolving Diagnostic Criteria of Neuromyelitis Optica
1 finding
Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord.
"Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord."
Show evidence (1 reference)
"Neuromyelitis optica (NMO) is an autoimmune demyelinating disorder of the central nervous system (CNS) with predilection for the optic nerves and spinal cord."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Neuromyelitis optica spectrum disorders: from pathophysiology to therapeutic strategies
1 finding
Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM).
"Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM)."
Show evidence (1 reference)
DOI:10.1186/s12974-021-02249-1 SUPPORT Human Clinical
"Neuromyelitis optica (NMO) is a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by acute optic neuritis (ON) and transverse myelitis (TM)."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Update on biomarkers in neuromyelitis optica
1 finding
Update on biomarkers in neuromyelitis optica
"Update on biomarkers in neuromyelitis optica"
Treatment and outcome of aquaporin-4 antibody–positive NMOSD
1 finding
Treatment and outcome of aquaporin-4 antibody–positive NMOSD
"Treatment and outcome of aquaporin-4 antibody–positive NMOSD"
Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder
1 finding
Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder
"Evaluation of the 2015 diagnostic criteria for neuromyelitis optica spectrum disorder"
Eculizumab Use in Neuromyelitis Optica Spectrum Disorders
1 finding
Eculizumab Use in Neuromyelitis Optica Spectrum Disorders
"Eculizumab Use in Neuromyelitis Optica Spectrum Disorders"
Immediate and sustained terminal complement inhibition with ravulizumab in patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorder
1 finding
Immediate and sustained terminal complement inhibition with ravulizumab in patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorder
"To assess the pharmacokinetics and pharmacodynamics of the long-acting terminal complement 5 (C5) inhibitor ravulizumab in adults with anti-aquaporin-4 antibody-positive (AQP4+) neuromyelitis optica spectrum disorder (NMOSD) in the phase 3, open-label CHAMPION-NMOSD trial..."
Show evidence (1 reference)
DOI:10.3389/fneur.2024.1332890 SUPPORT Human Clinical
"To assess the pharmacokinetics and pharmacodynamics of the long-acting terminal complement 5 (C5) inhibitor ravulizumab in adults with anti-aquaporin-4 antibody-positive (AQP4+) neuromyelitis optica spectrum disorder (NMOSD) in the phase 3, open-label CHAMPION-NMOSD trial..."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
The Immunology of Neuromyelitis Optica—Current Knowledge, Clinical Implications, Controversies and Future Perspectives
1 finding
Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks.
"Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks."
Show evidence (1 reference)
DOI:10.3390/ijms17030273 SUPPORT Human Clinical
"Neuromyelitis optica (NMO) is an autoimmune, demyelinating disorder of the central nervous system (CNS) with typical clinical manifestations of optic neuritis and acute transverse myelitis attacks."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Treatment of Neuromyelitis Optica Spectrum Disorders
1 finding
Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality.
"Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality."
Show evidence (1 reference)
DOI:10.3390/ijms22168638 SUPPORT Other
"Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.
Humanized-Aquaporin-4-Expressing Rat Created by Gene-Editing Technology and Its Use to Clarify the Pathology of Neuromyelitis Optica Spectrum Disorder
1 finding
Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs).
"Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs)."
Show evidence (1 reference)
DOI:10.3390/ijms25158169 SUPPORT Model Organism
"Conventional rodent neuromyelitis optica spectrum disorder (NMOSD) models using patient-derived immunoglobulin G (IgG) are potentially affected by the differences between the human and rodent aquaporin-4 (AQP4) extracellular domains (ECDs)."
Deep research cited this publication as relevant literature for Neuromyelitis Optica Spectrum Disorder with Anti-AQP4 Antibodies.

Deep Research

1
Falcon
1. Disease Information
Edison Scientific Literature 63 citations 2026-05-10T07:23:43.742548

1. Disease Information

1.1 Definition and overview

NMOSD with anti‑AQP4 antibodies is an autoimmune inflammatory CNS disorder distinct from multiple sclerosis, unified under the term neuromyelitis optica spectrum disorders (NMOSD) and stratified by AQP4‑IgG serostatus (AQP4‑IgG positive vs negative/unknown). (wingerchuk2015internationalconsensusdiagnostic pages 1-2, wingerchuk2015internationalconsensusdiagnostic pages 3-3)

Core concept: In AQP4‑IgG+ disease, pathogenic antibodies target the astrocyte water channel aquaporin‑4 (AQP4), producing an astrocytopathy with secondary demyelination and neuroaxonal injury. (contentti2021neuromyelitisopticaspectrum pages 1-2, collongues2019pharmacotherapyforneuromyelitis pages 1-2)

1.2 Key identifiers and controlled vocabularies

  • MONDO / Orphanet / ICD-10/ICD-11 / MeSH: Not retrieved in the current evidence set; recommended to populate from MONDO/Orphanet/WHO ICD browsers and MeSH “Neuromyelitis Optica” entries. (Gap)

1.3 Synonyms and alternative names

  • Neuromyelitis optica (NMO)
  • Devic disease (historical)
  • AQP4‑IgG‑positive NMOSD / AQP4‑Ab+ NMOSD (wingerchuk2015internationalconsensusdiagnostic pages 3-3, wingerchuk2015internationalconsensusdiagnostic pages 5-6)

1.4 Diagnostic category per 2015 IPND

The 2015 International Panel for NMO Diagnosis (IPND) created two categories: 1) NMOSD with AQP4‑IgG 2) NMOSD without AQP4‑IgG (or unknown) (wingerchuk2015internationalconsensusdiagnostic pages 3-3, bennett2016findingnmothe pages 11-12)

Visual evidence: the IPND criteria table is available as a cropped image from the original consensus paper. (wingerchuk2015internationalconsensusdiagnostic media 83817c93)


2. Etiology

2.1 Primary causal factors

Autoantibody-mediated astrocytopathy: AQP4‑IgG binds AQP4 at astrocyte endfeet, triggers classical complement activation and inflammatory injury; astrocyte loss precedes secondary demyelination/neuronal injury. (contentti2021neuromyelitisopticaspectrum pages 1-2, collongues2019pharmacotherapyforneuromyelitis pages 1-2)

2.2 Risk factors

Sex: Strong female predominance is consistent across cohorts and meta-analysis (female:male ~8.9 overall). (arnett2024sexratioand pages 1-2, sechi2024epidemiologyofaquaporin4iggpositive pages 8-12)

Coexisting autoimmunity: Coexisting systemic autoimmune diseases are common; in Sardinia 52% had concomitant autoimmune disorders (autoimmune thyroiditis most frequent). (sechi2024epidemiologyofaquaporin4iggpositive pages 8-12, sechi2024epidemiologyofaquaporin4iggpositive pages 34-37)

Environmental factors (suggested): Proposed factors include infections, smoking, and vitamin D deficiency, based on epidemiologic discussion; high-quality causal estimates were not identified in the current evidence set. (sechi2024epidemiologyofaquaporin4iggpositive pages 34-37)

2.3 Genetic susceptibility (non-Mendelian)

No single causal gene defines AQP4‑IgG+ NMOSD. Reported susceptibility loci/haplotypes include HLA‑DPB1, HLA‑DRB1*03:01, immune regulatory variants (e.g., PTPN22 PD‑1.3A allele, CD226 Gly307Ser) and possible protective signal at CYP7A1 G/G; HLA‑DRB1*1501 (MS risk) is not associated with NMO. (melamed2015updateonbiomarkers pages 4-5, contentti2021neuromyelitisopticaspectrum pages 2-4)

2.4 Protective factors and gene–environment interactions

No robust protective factors or formal gene–environment interaction studies were retrieved in the current evidence set. (Gap)


3. Phenotypes

3.1 Core clinical characteristics (2015 IPND)

For AQP4‑IgG+ NMOSD, ≥1 of the following core clinical characteristics is sufficient (with AQP4‑IgG positivity and exclusion of alternative diagnoses): 1) Optic neuritis 2) Acute myelitis 3) Area postrema syndrome (hiccups or nausea/vomiting) 4) Acute brainstem syndrome 5) Diencephalic syndrome (e.g., symptomatic narcolepsy) with typical features 6) Symptomatic cerebral syndrome with NMOSD-typical lesions (wingerchuk2015internationalconsensusdiagnostic pages 3-3, bennett2016findingnmothe pages 11-12)

3.2 Frequency and presentation statistics

AQP4‑IgG+ cohort phenotype frequencies (Korea cohort evaluating 2015 criteria): * Acute myelitis occurred in 190/226 (84%) (disease course) (hyun2016evaluationofthe pages 4-6) * Symptomatic brain syndromes occurred in 100/252 (40%) overall, with lesion-category counts area postrema 16%, brainstem 16%, cerebral 15% (hyun2016evaluationofthe pages 4-6)

Sardinia incident AQP4‑IgG+ cases (2013–2022): * LETM 68% * Optic neuritis 16% * Brainstem syndromes 6% * Encephalitis 3% * Combinations 6% (including area postrema syndromes) (sechi2024epidemiologyofaquaporin4iggpositive pages 8-12)

3.3 Temporal patterns (onset and course)

NMOSD is generally relapsing: 80–90% relapsing course; after first attack 60% relapse within 1 year and 90% within 3 years (older but widely cited synthesis). (jasiakzatonska2016theimmunologyof pages 3-6)

3.4 Quality of life (QoL)

QoL and fatigue are recognized as burdensome symptoms in NMOSD, but disease‑specific quantitative QoL metrics and 2023–2024 trial‑embedded QoL data were not retrieved in the current evidence set. (duchow2020currentandemerging pages 1-5)

3.5 Suggested HPO terms (examples)

  • Optic neuritis – HP:0000540
  • Transverse myelitis – HP:0002240
  • Nausea – HP:0002018; Vomiting – HP:0002013; Hiccups – HP:0002030 (area postrema syndrome features)
  • Paraplegia – HP:0003401
  • Blindness – HP:0000618 (These ontology mappings are suggested; not validated in retrieved texts.)

4. Genetic / Molecular Information

4.1 Causal genes

NMOSD with AQP4‑IgG is not a monogenic disorder; AQP4 is the antigenic target, not typically mutated. (contentti2021neuromyelitisopticaspectrum pages 1-2)

4.2 AQP4 protein biology relevant to pathogenesis

AQP4 is enriched at astrocyte endfeet and forms supramolecular orthogonal arrays of particles (OAPs), with M23 favoring OAPs; OAP clustering facilitates complement activation after antibody binding. (chan2021treatmentofneuromyelitis pages 2-3, contentti2021neuromyelitisopticaspectrum pages 2-4)

4.3 Biomarkers and targets

  • AQP4‑IgG (serum) is the key diagnostic biomarker; CSF-only positivity is rare. (wingerchuk2015internationalconsensusdiagnostic pages 5-6, contentti2021neuromyelitisopticaspectrum pages 2-4)
  • GFAP is discussed as an emerging biomarker concept in the biomarker literature; prospective validation was not available in the retrieved primary dataset. (bennett2016findingnmothe pages 3-4)
  • Therapeutic targets with approval-stage evidence include IL6R, CD19, C5 (OpenTargets). (OpenTargets Search: Neuromyelitis optica spectrum disorder)

4.4 Epigenetics and omics

No robust epigenetic or multi‑omics (transcriptomic/proteomic/metabolomic) signatures were retrieved in the current evidence set. (Gap)


5. Mechanism / Pathophysiology

5.1 Causal chain (current understanding)

1) Peripheral immune dysregulation with plasmablast expansion; IL‑6 supports plasmablast survival and AQP4‑Ab secretion. (contentti2021neuromyelitisopticaspectrum pages 2-4) 2) AQP4‑IgG enters CNS via disrupted BBB or permissive regions and binds AQP4 on astrocyte endfeet/ependymal surfaces. (contentti2021neuromyelitisopticaspectrum pages 2-4) 3) Binding triggers classical complement activation and inflammatory infiltration (neutrophils/eosinophils/macrophages), causing astrocyte injury with loss of AQP4 and GFAP, then secondary demyelination and neuronal injury. (collongues2019pharmacotherapyforneuromyelitis pages 1-2, contentti2021neuromyelitisopticaspectrum pages 1-2)

5.2 2024 mechanistic developments

Complement-dependent Th17 cytokine release: PBMCs from treatment‑naïve AQP4‑IgG+ NMOSD patients stimulated with AQP4 immune complexes + complement produced elevated IL‑17A and IL‑6, supporting a complement‑dependent Th17‑biased peripheral inflammatory loop. (Feb 2024; https://doi.org/10.1038/s41598-024-53661-5) (nishiyama2024antiaquaporin4immunecomplex pages 1-2)

IFN‑γ axis and modeling: Decreased IFN‑γ receptor signaling and IFN‑γ depletion in AQP4 peptide‑immunized mice produced severe NMOSD‑like disease; IL‑6/Th17 activation increased, and targeting IL‑17A, IL‑6R, or B cells improved disease; a tolerance strategy (AQP4‑peptide PLGA nanoparticles) prevented/treated disease in the model. (Nov 2024; https://doi.org/10.1093/brain/awad373) (arellano2024interferonγcontrolsaquaporin4specific pages 1-2)

5.3 Suggested GO biological processes / cell types (examples)

  • GO:0006956 complement activation
  • GO:0006955 immune response
  • GO:0006954 inflammatory response
  • GO:0006957 complement activation, classical pathway
  • CL:0000127 astrocyte; CL:0000540 microglial cell; CL:0000775 neutrophil; CL:0000236 B cell; CL:0000624 CD4-positive T cell (These are suggested mappings; not explicitly enumerated in the retrieved texts.)

6. Anatomical Structures Affected

6.1 Organ/system level

Primarily affects the central nervous system with lesions in: * Optic nerve/chiasm (optic neuritis) (wingerchuk2015internationalconsensusdiagnostic pages 5-6) * Spinal cord (LETM; central cord predilection) (wingerchuk2015internationalconsensusdiagnostic pages 5-6) * Dorsal medulla/area postrema (area postrema syndrome) (wingerchuk2015internationalconsensusdiagnostic pages 5-6) * Periependymal regions around the third/fourth ventricles, hypothalamus/thalamus (wingerchuk2015internationalconsensusdiagnostic pages 5-6)

6.2 Tissue/cell level

Targeted cell compartment: astrocyte endfeet at the BBB and ependymal surfaces, reflecting AQP4 localization. (collongues2019pharmacotherapyforneuromyelitis pages 1-2, contentti2021neuromyelitisopticaspectrum pages 2-4)

6.3 Subcellular level

AQP4 supramolecular organization into OAPs influences complement activation, linking membrane organization to cytotoxicity. (chan2021treatmentofneuromyelitis pages 2-3, jasiakzatonska2016theimmunologyof pages 8-10)


7. Temporal Development

  • Onset: Typically adult onset; in Sardinia median onset 54 years with rare pediatric onset. (sechi2024epidemiologyofaquaporin4iggpositive pages 8-12)
  • Course: Relapses drive disability; gradual progression is rare (red flag). (wingerchuk2015internationalconsensusdiagnostic pages 3-4)

8. Inheritance and Population

8.1 Epidemiology (recent quantitative estimates)

  • Population-based Sardinia study (May 2024): incidence 1.9 per million person‑years and prevalence 2.6 per 100,000 (AQP4‑IgG+ NMOSD). (sechi2024epidemiologyofaquaporin4iggpositive pages 8-12)
  • Reviews summarize broad prevalence ranges and highlight ancestry differences (higher in East‑Asian and African‑Caribbean populations). (duchow2020currentandemerging pages 1-5, sechi2024epidemiologyofaquaporin4iggpositive pages 12-14)

8.2 Sex ratio and age of onset

Meta-analysis estimate for AQP4‑IgG+ NMOSD: female:male 8.89 (95% CI 7.78–10.15); pediatric estimate 5.68; late-onset 5.48. (Jul 2024; https://doi.org/10.1007/s00415-024-12452-8) (arnett2024sexratioand pages 1-2)

8.3 Inheritance

No Mendelian inheritance pattern is established; susceptibility appears polygenic/immune‑regulatory. (melamed2015updateonbiomarkers pages 4-5)


9. Diagnostics

9.1 Clinical criteria (2015 IPND)

For AQP4‑IgG+ NMOSD diagnosis requires: 1) At least one core clinical characteristic, 2) Positive AQP4‑IgG (best available method; CBA strongly recommended), 3) Exclusion of alternative diagnoses. (wingerchuk2015internationalconsensusdiagnostic pages 3-3, bennett2016findingnmothe pages 11-12)

9.2 AQP4‑IgG testing and performance

2015 IPND emphasizes cell‑based serum assays (microscopy/flow) as preferred, citing pooled mean sensitivity ~76.7% and very low false-positive rate (~0.1% in an MS clinic cohort), while ELISA and IIF have lower sensitivity and more false positives. (wingerchuk2015internationalconsensusdiagnostic pages 5-6)

A separate review summarizes assay performance across platforms (example: CBA ~91% sensitivity/100% specificity reported in that review). (jasiakzatonska2016theimmunologyof pages 11-14)

9.3 MRI and CSF patterns

  • Spinal MRI: LETM (≥3 vertebral segments), central gray matter predilection. (wingerchuk2015internationalconsensusdiagnostic pages 4-5)
  • Optic nerve MRI: long lesions, posterior/chiasm involvement. (wingerchuk2015internationalconsensusdiagnostic pages 4-5)
  • Brain MRI: dorsal medulla/area postrema; periependymal third/fourth ventricle lesions; hypothalamus/thalamus; long corticospinal/corpus callosum lesions. (wingerchuk2015internationalconsensusdiagnostic pages 5-6)
  • CSF (typical): pleocytosis often >50 cells/mm³, neutrophils; elevated protein (100–500 mg/dL); oligoclonal bands uncommon (~15–30%). (jasiakzatonska2016theimmunologyof pages 3-6)

9.4 Differential diagnosis

Red flags favoring MS include Dawson fingers/cortical lesions, typical MS brain lesion distribution, and high frequency of oligoclonal bands; MOG‑IgG should be tested in seronegative NMOSD phenotypes. (wingerchuk2015internationalconsensusdiagnostic pages 5-6, seze2016neuromyelitisopticaspectrum pages 1-2)

9.5 Suggested LOINC-like test concepts (examples)

  • Serum aquaporin‑4 IgG by cell-based immunoassay (preferred)
  • CSF oligoclonal bands
  • CSF cell count and differential (Actual LOINC codes not retrieved.)

10. Outcome / Prognosis

10.1 Relapse-driven disability

Relapses are the main driver of irreversible disability; severe relapses can cause blindness and paralysis. (contentti2021neuromyelitisopticaspectrum pages 2-4)

10.2 Relapse probability and prognostic factors

Older synthesis: after first attack 60% relapse within 1 year and 90% within 3 years; worse prognosis linked to high early relapse frequency, severe first attack, and coexisting systemic autoimmunity. (jasiakzatonska2016theimmunologyof pages 3-6)

Pediatric AQP4‑IgG+ NMOSD: non‑White ethnicity associated with shorter time to first relapse and worse EDSS at last follow‑up. (paolilo2020treatmentandoutcome pages 3-4)

10.3 Modern outcomes with targeted therapy

Real-world eculizumab cohort (Germany/Austria, 2014–2022): 88% attack-free; median annualized attack rate decreased from 1.0 to 0; EDSS stable (median 6.0). (ringelstein2024eculizumabusein pages 1-2)


11. Treatment

11.1 Acute relapse treatment

  • High-dose IV methylprednisolone is standard initial therapy; plasma exchange (PLEX) is used for refractory attacks. (contentti2021neuromyelitisopticaspectrum pages 2-4, tugizova2021newtherapeuticlandscape pages 1-4)

11.2 Relapse prevention: pivotal trials (key statistics)

  • Eculizumab (C5 inhibitor; PREVENT RCT, NEJM 2019): relapses 3/96 (3%) vs 20/47 (43%); HR 0.06 (95% CI 0.02–0.20; p<0.001); trial ARR 0.02 vs 0.35. (Aug 2019; https://doi.org/10.1056/NEJMoa1900866) (pittock2019eculizumabinaquaporin4–positive pages 1-2)
  • Satralizumab (IL‑6R inhibitor):
  • Add-on SAkuraSky (NEJM 2019): relapse 20% vs 43% overall; AQP4‑IgG+ subgroup relapse 11% vs 43%; HRs provided in secondary synthesis. (contentti2021neuromyelitisopticaspectrum pages 11-13)
  • Monotherapy SAkuraStar (Lancet Neurol 2020): relapse 30% vs 50%; HR 0.45 (95% CI 0.23–0.89; p=0.018). (May 2020; https://doi.org/10.1016/S1474-4422(20)30078-8) (traboulsee2020safetyandefficacy pages 1-2)
  • Inebilizumab (anti‑CD19; N‑MOmentum): relapse 12% (21/174) vs 39% (22/56); AQP4+ relapse 11% (18/161) vs 42% (22/52); disability benefit reported (3‑month CDP HR 0.375). (tugizova2021newtherapeuticlandscape pages 9-11)

11.3 Real-world implementation and safety considerations (2024)

Eculizumab real-world cohort: vaccination prior to therapy was common; 19% had attacks shortly after pre‑treatment meningococcal vaccination when not on prednisone; serious infections in 13% and deaths in 10% (including meningococcal sepsis). (ringelstein2024eculizumabusein pages 1-2)

11.4 Ravulizumab (2024 update)

Ravulizumab achieved immediate and sustained terminal complement inhibition in CHAMPION‑NMOSD pharmacology analyses; indirect comparisons suggest strong relapse prevention versus other mechanisms. (clardy2024networkmetaanalysisof pages 1-3)

11.5 Suggested MAXO terms (examples)

  • Plasma exchange therapy – MAXO:0000503 (suggested)
  • High‑dose corticosteroid therapy – MAXO term needed (suggested)
  • Monoclonal antibody therapy – MAXO:0000142 (suggested) (Exact MAXO IDs not retrieved.)

12. Prevention

12.1 Primary prevention

No established strategy prevents initial development of AQP4‑IgG autoimmunity. (Gap)

12.2 Secondary prevention

Early recognition using IPND criteria and high‑specificity AQP4‑IgG testing enables earlier disease-modifying therapy and avoidance of MS therapies that may worsen NMOSD. (wingerchuk2015internationalconsensusdiagnostic pages 3-3, bennett2016findingnmothe pages 3-4)

12.3 Tertiary prevention

Maintenance immunotherapy to prevent relapses is the central prevention strategy; complement inhibitor use requires meningococcal vaccination and careful infection vigilance. (chan2021treatmentofneuromyelitis pages 17-19, ringelstein2024eculizumabusein pages 1-2)


13. Other Species / Natural Disease

Naturally occurring AQP4‑IgG NMOSD in non‑human species was not identified in the current evidence set. (Gap)


14. Model Organisms

14.1 Passive-transfer and experimental lesion models

AQP4‑IgG + complement applied to in vitro/ex vivo CNS tissues or injected into CNS regions produces NMO‑like lesions (AQP4 loss, astrocytopathy, demyelination, neuron loss) but often requires BBB disruption or local delivery, limiting modeling of chronic relapsing disease. (xu2025aquaporin4iggseropositiveneuromyelitisoptica pages 4-5, xu2025aquaporin4iggseropositiveneuromyelitisoptica pages 8-8)

14.2 2024 AQP4 peptide immunization model (IFN‑γ depletion)

IFN‑γ depletion in AQP4_201–220‑immunized mice induces severe NMOSD‑like disease and provides a platform to test IL‑17A/IL‑6R/B‑cell targeting and tolerization nanoparticles. (arellano2024interferonγcontrolsaquaporin4specific pages 1-2)

14.3 2024 humanized-AQP4 rat model

Gene‑edited rats expressing humanized AQP4 extracellular domains enable astrocyte‑loss lesions to be induced by human AQP4‑specific antibodies, addressing species-binding limitations. (Jul 2024; https://doi.org/10.3390/ijms25158169) (namatame2024humanizedaquaporin4expressingratcreated pages 1-2)


Current applications and real-world implementations

  • Clinical application of IPND criteria with cell‑based AQP4‑IgG assays enables diagnosis after a single core clinical event in seropositive patients, influencing earlier initiation of relapse-prevention therapy. (wingerchuk2015internationalconsensusdiagnostic pages 3-3, wingerchuk2015internationalconsensusdiagnostic pages 5-6)
  • Relapse prevention now uses mechanism‑targeted biologics (C5 inhibition, IL‑6R blockade, CD19 B‑cell depletion) with demonstrated RCT efficacy and expanding real‑world safety datasets. (pittock2019eculizumabinaquaporin4–positive pages 1-2, traboulsee2020safetyandefficacy pages 1-2, ringelstein2024eculizumabusein pages 1-2)

Expert opinions and authoritative analyses

  • The IPND emphasizes that seropositive NMOSD can present with diverse neuroanatomic syndromes, and that cell‑based assays should be used due to sensitivity/specificity advantages. (wingerchuk2015internationalconsensusdiagnostic pages 5-6, wingerchuk2015internationalconsensusdiagnostic pages 3-3)
  • Reviews in high-impact neurology journals frame relapse prevention as the key therapeutic goal because disability accrues from attacks rather than progressive degeneration. (contentti2021neuromyelitisopticaspectrum pages 2-4, levy2021newtherapiesfor pages 3-4)

Embedded evidence summary table

Item Key quantitative result Population/notes Primary source (journal, year) URL
2015 IPND definition of AQP4-IgG+ NMOSD Diagnosis requires ≥1 core clinical characteristic + positive AQP4-IgG (best available assay; cell-based assay preferred) + exclusion of alternative diagnoses. Core characteristics: optic neuritis, acute myelitis, area postrema syndrome, acute brainstem syndrome, diencephalic syndrome, symptomatic cerebral syndrome with NMOSD-typical brain lesions (wingerchuk2015internationalconsensusdiagnostic pages 3-3, wingerchuk2015internationalconsensusdiagnostic pages 1-2, wingerchuk2015internationalconsensusdiagnostic pages 5-6) AQP4-IgG status stratifies NMOSD into seropositive vs seronegative/unknown categories; seronegative cases require more stringent clinico-radiologic evidence (wingerchuk2015internationalconsensusdiagnostic pages 3-3, wingerchuk2015internationalconsensusdiagnostic pages 1-2) Wingerchuk et al., Neurology, 2015 https://doi.org/10.1212/WNL.0000000000001729
Eculizumab (PREVENT) Adjudicated relapse in 3/96 (3%) vs 20/47 (43%) with placebo; HR 0.06 (95% CI 0.02-0.20; P<0.001). Trial ARR 0.02 vs 0.35; rate ratio 0.04 (95% CI 0.01-0.15; P<0.001) (pittock2019eculizumabinaquaporin4–positive pages 1-2) Adults with AQP4-IgG+ NMOSD; 76% remained on background immunosuppression. Headache and URTI more common; one death from pulmonary empyema in eculizumab arm (pittock2019eculizumabinaquaporin4–positive pages 1-2) Pittock et al., New England Journal of Medicine, 2019 https://doi.org/10.1056/NEJMoa1900866
Satralizumab add-on (SAkuraSky) Relapse in 8/41 (20%) vs 18/42 (43%) with placebo; HR 0.38 (95% CI 0.16-0.88). In AQP4-IgG+ subgroup: 11% vs 43%; HR 0.21 (95% CI 0.06-0.75) (contentti2021neuromyelitisopticaspectrum pages 11-13) Satralizumab added to stable immunosuppressive therapy; serious adverse events and infections did not differ between groups; pain/fatigue endpoints not significantly different (contentti2021neuromyelitisopticaspectrum pages 11-13) Yamamura et al., New England Journal of Medicine, 2019 https://doi.org/10.1056/NEJMoa1901747
Satralizumab monotherapy (SAkuraStar) Protocol-defined relapse in 19/63 (30%) vs 16/32 (50%) with placebo; HR 0.45 (95% CI 0.23-0.89; P=0.018) (traboulsee2020safetyandefficacy pages 1-2) Monotherapy phase 3 trial in NMOSD; adverse-event rates 473.9 vs 495.2 per 100 patient-years (satralizumab vs placebo), with similar serious adverse events and withdrawals (traboulsee2020safetyandefficacy pages 1-2) Traboulsee et al., The Lancet Neurology, 2020 https://doi.org/10.1016/S1474-4422(20)30078-8
Inebilizumab (N-MOmentum) Relapse in 21/174 (12%) vs 22/56 (39%) with placebo; HR 0.27. In AQP4-IgG+ subgroup: 18/161 (11%) vs 22/52 (42%); HR 0.23. Three-month confirmed disability progression: HR 0.375 (95% CI 0.148-0.952; P=0.0390) (tugizova2021newtherapeuticlandscape pages 9-11) Anti-CD19 B-cell depletion; serious adverse events 5% (8/174) vs 9% (5/56), transient grade 3 neutropenia 2%, infusion reactions similar; two deaths occurred in open-label period (tugizova2021newtherapeuticlandscape pages 9-11) Cree et al., The Lancet, 2019; Marignier et al., Neurology: Neuroimmunology & Neuroinflammation, 2021 https://doi.org/10.1016/S0140-6736(19)31817-3
2024 update: Ravulizumab (CHAMPION-NMOSD PK/PD) In 58 treated patients, serum ravulizumab stayed above therapeutic threshold in all patients through 50 weeks; immediate and complete terminal complement inhibition (free C5 <0.5 μg/mL) achieved by end of first infusion and sustained. Trial summary notes no adjudicated on-trial relapses among ravulizumab recipients (clardy2024networkmetaanalysisof pages 1-3) Long-acting C5 inhibitor in adults with AQP4+ NMOSD; weight-based loading then maintenance every 8 weeks (clardy2024networkmetaanalysisof pages 1-3) Ortiz et al., Frontiers in Neurology, 2024 https://doi.org/10.3389/fneur.2024.1332890
2024 update: Ravulizumab network meta-analysis Compared with monotherapy alternatives, ravulizumab showed lower relapse risk vs inebilizumab HR 0.09 (95% CrI 0.02-0.57) and satralizumab HR 0.08 (95% CrI 0.01-0.55), and was comparable to eculizumab HR 0.86 (95% CrI 0.16-4.52). ARR about 98% lower vs inebilizumab/satralizumab monotherapy (clardy2024networkmetaanalysisof pages 1-3) Bayesian network meta-analysis using PREVENT, N-MOmentum, SAkuraSky, SAkuraStar, and CHAMPION-NMOSD; indirect comparisons only, no head-to-head RCTs (clardy2024networkmetaanalysisof pages 1-3) Clardy et al., Neurology and Therapy, 2024 https://doi.org/10.1007/s40120-024-00597-7
2024 update: Real-world eculizumab effectiveness/safety In 52 AQP4-IgG+ patients, 88% attack-free on eculizumab; median annualized attack rate fell from 1.0 pre-treatment to 0 (P<0.001). Serious infections in 13%, deaths in 10%; among 36 vaccinated pre-eculizumab without prednisone, 7 (19%) had attacks shortly after vaccination (ringelstein2024eculizumabusein pages 1-2) Multicenter German/Austrian real-world cohort; disability median EDSS remained stable at 6.0 and MRI lesion activity decreased (ringelstein2024eculizumabusein pages 1-2) Ringelstein et al., Neurology, 2024 https://doi.org/10.1212/WNL.0000000000209888

Table: This table summarizes the defining 2015 diagnostic criteria for AQP4-IgG-positive NMOSD and the major relapse-prevention therapies with pivotal trial outcomes, plus key 2024 clinical updates. It is useful as a compact reference for diagnosis and current treatment evidence.


Notable evidence gaps (for knowledge-base completion)

  • Ontology identifiers (MONDO, ICD-10/11, Orphanet, MeSH) were not retrievable from the current tool context and should be filled via dedicated ontology lookups.
  • Robust 2023–2024 QoL metrics, OCT retinal thickness meta-analytic values, and multi‑omics/epigenetic datasets were not captured in the evidence retrieved here.

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