An autoimmune skin disorder characterized by the loss of skin pigmentation due to the destruction of melanocytes.
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name: Vitiligo
creation_date: '2025-12-04T16:57:31Z'
updated_date: '2026-04-30T12:00:00Z'
description: An autoimmune skin disorder characterized by the loss of skin
pigmentation due to the destruction of melanocytes.
category: Complex
parents:
- Autoimmune Disease
- Skin Disorder
inheritance:
- name: Multifactorial/polygenic
description: Vitiligo has a complex, non-Mendelian inheritance pattern
involving approximately 50 genetic risk loci interacting with
environmental triggers.
evidence:
- reference: PMID:28317533
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Vitiligo reflects simultaneous contributions of multiple genetic risk
factors and environmental triggers. Genomewide association studies have
discovered approximately 50 genetic loci contributing to vitiligo risk.
explanation: GWAS studies confirm polygenic inheritance with ~50 loci.
prevalence:
- population: Worldwide
percentage: 0.5-2
notes: >-
The worldwide prevalence of vitiligo ranges from 0.5% to 2%, making it
the most frequent cause of depigmentation globally.
evidence:
- reference: PMID:25596811
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Vitiligo, an acquired pigmentary disorder of unknown origin, is the
most frequent cause of depigmentation worldwide, with an estimated
prevalence of 1%.
explanation: Lancet Seminar reports estimated global prevalence of 1%.
- reference: PMID:38768496
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The worldwide prevalence ranges from 0.5% to 2%, and in children from
0% to 2.16%.
explanation: Childhood vitiligo study confirms the 0.5-2% range.
- reference: ORPHA:3435
supports: SUPPORT
evidence_source: OTHER
snippet: "NON RARE IN EUROPE: Vitiligo"
explanation: Orphanet classifies vitiligo as non-rare in Europe,
consistent with prevalence estimates of 0.5-2%.
has_subtypes:
- name: Non-Segmental Vitiligo (NSV)
description: Most common form, characterized by symmetrical depigmented patches on both sides of the body. Includes generalized, acrofacial, and universal variants.
evidence:
- reference: PMID:20540698
reference_title: "Vitiligo: pathogenetic hypotheses and targets for current therapies."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: 'Non segmental vitiligo (NSV) is the most common form of the disease: it is usually progressive and may be associated with familiarity and autoimmunity.'
explanation: The reference confirms that Non-Segmental Vitiligo (NSV) is the most common form of vitiligo.
- reference: PMID:22237197
reference_title: "Clinical pattern of vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Generalized vitiligo was the most common type (n=132, 57.4%) followed by focal (n=53, 23%) and acro-facial vitiligo (n=16, 7%).
explanation: This reference identifies generalized vitiligo as the most common, which is a subtype of NSV, supporting the statement.
- reference: PMID:33431938
reference_title: "Association of GZMB polymorphisms and susceptibility to non-segmental vitiligo in a Korean population."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Non-segmental vitiligo (NSV) is the most common type of vitiligo, which is characterized by chronic and progressive loss of melanocytes.
explanation: The reference directly states that NSV is the most common type of vitiligo.
- reference: PMID:37062442
reference_title: "Prevalence of immune-mediated inner ear disease in non-segmental vitiligo: A cross-sectional study."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The concomitance of autoimmune disease in vitiligo patients demands
the investigation of immune-mediated inner ear disease (IMIED) as a cause
of SNHL in NSV.
explanation: The reference indicates the association of autoimmune
conditions with NSV, characterizing it as a common subtype.
- name: Segmental Vitiligo (SV)
description: Patches are restricted to one side of the body or one area, such as a limb or the face. Typically has an earlier onset and progresses for a few years before stabilizing.
evidence:
- reference: PMID:28317524
reference_title: "Segmental Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Segmental vitiligo is characterized by its early onset, rapid stabilization, and unilateral distribution.
explanation: The provided description is consistent with the characterization of segmental vitiligo mentioned in the literature.
- reference: PMID:35094387
reference_title: "Clinicodemographic features of mixed vitiligo: a case-control study."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Mixed vitiligo (MV) is the coexistence of segmental vitiligo (SV) and non-segmental vitiligo (NSV)...As compared to SV, MV had significantly lower mean age of onset of segmental component (SC) (13.33 ± 9.01 vs. 15.70 ± 8.60 years, P = 0.03) and significantly higher proportion of patients with more than 1% body surface involvement by SC (66.2% vs. 51.5%, P = 0.03)
explanation: The text mentions segmental vitiligo and supports characteristics such as early onset.
- name: Mixed Vitiligo
description: A combination of segmental and non-segmental types occurring simultaneously or sequentially in the same individual.
evidence:
- reference: PMID:17241584
reference_title: "Mixed vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: 'OBSERVATION: We report four more cases of mixed vtiligo, segmental with generalized type'
explanation: The provided literature discusses cases where segmental and generalized vitiligo occur together in the same individual, which supports the existence of mixed vitiligo.
- reference: PMID:34780118
reference_title: "New insights into segmental vitiligo: A clinical and immunological comparison with nonsegmental vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The overlaps between segmental vitiligo (SV) and nonsegmental vitiligo (NSV) suggest the underlying features of SV, which may be helpful for treating SV...The clinical and immunological similarities between SV and M-NSV presented a deeper autoimmune understanding of SV.
explanation: This reference discusses overlaps and similarities between segmental and non-segmental vitiligo but does not specifically confirm the simultaneous or sequential occurrence in the same individual.
pathophysiology:
- name: Melanocyte Destruction
description: Autoimmune-mediated destruction where the immune system targets melanocytes, leading to loss of skin pigment.
cell_types:
- preferred_term: Melanocyte
term:
id: CL:0000148
label: melanocyte
- preferred_term: CD8+ T Lymphocyte
term:
id: CL:0000625
label: CD8-positive, alpha-beta T cell
evidence:
- reference: PMID:33200838
reference_title: "Mechanisms of melanocyte death in vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an autoimmune depigment disease results from extensive melanocytes destruction...self-responsive immune function directly contributes to the bulk of melanocyte deaths in vitiligo...CD8(+) cytotoxic T lymphocytes finally execute the killing of melanocytes.
explanation: The literature describes the autoimmune-mediated destruction of melanocytes involving CD8+ T lymphocytes, consistent with the provided statement.
- reference: PMID:31209143
reference_title: "The Role of Memory CD8(+) T Cells in Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an autoimmune skin disease mediated by autoreactive CD8(+) T cells that destroy the pigment-producing cells of the epidermis, melanocytes, leading to areas of depigmentation.
explanation: The reference confirms the autoimmune-mediated destruction mechanism, mentioning both CD8+ T lymphocytes and melanocytes.
- reference: PMID:25184918
reference_title: "Vitiligo--Part 2--classification, histopathology and treatment."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The main histopathological finding in vitiligo is the total absence of functioning melanocytes in the lesions, while the inflammatory cells most commonly found on the edges of the lesions are CD4+ and CD8+ T lymphocytes.
explanation: The literature supports the involvement of CD8+ T lymphocytes and the destruction of melanocytes in vitiligo.
- reference: PMID:35653192
reference_title: "Multimodal analyses of vitiligo skin identify tissue characteristics of stable disease."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an autoimmune skin disease characterized by the destruction of melanocytes by autoreactive CD8+ T cells.
explanation: This source directly mentions the destruction of melanocytes by CD8+ T cells.
- reference: PMID:18460889
reference_title: "Autoimmune etiology of generalized vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is characterized by progressive skin depigmentation resulting from an autoimmune response targeting epidermal melanocytes...Type I cytokine-mediated immunity to melanocytes in vitiligo involves T cells reactive with melanosomal antigens...
explanation: The source elaborates on the autoimmune nature of vitiligo, involving T cells and targeting melanocytes.
- name: Genetic Predisposition
description: A complex interplay of multiple genes contributes to susceptibility to vitiligo.
evidence:
- reference: PMID:28317533
reference_title: "Genetics of Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo reflects simultaneous contributions of multiple genetic risk factors and environmental triggers. Genomewide association studies have discovered approximately 50 genetic loci contributing to vitiligo risk.
explanation: The literature clearly states that multiple genetic risk factors contribute to vitiligo, aligning with the statement's claim of a complex interplay of genes.
- reference: PMID:28206724
reference_title: "Vitiligo susceptibility and catalase gene polymorphisms in Sicilian population."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Contrary to the Northern part of Europe but likewise to the Mediterranean area, the frequency of the CAT genotypes in Sicily is equally distributed. Out of all CAT genotypes, only CAT-89 T/T frequency was found to be significantly higher amongst vitiligo patients than controls.
explanation: The study mentions the association of specific gene polymorphisms with vitiligo, supporting the notion of a genetic predisposition.
- reference: PMID:29704874
reference_title: "The convergence theory for vitiligo: A reappraisal."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The viewpoint that vitiligo is not caused only by predisposing mutations, or only by melanocytes responding to chemical/radiation exposure, or only by hyperreactive T cells, but rather results from a combination of aetiologic factors that impact melanocyte viability, has certainly stood the test of time.
explanation: The convergence theory supports the idea that multiple genetic and environmental factors contribute to vitiligo.
- reference: PMID:33278065
reference_title: "An update on Vitiligo pathogenesis."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The complex interplay between non-immunological and immunological factors in vitiligo is key for the development of the disease.
explanation: This underscores the multifactorial nature of vitiligo, consistent with the statement's emphasis on a complex genetic interplay.
- name: Autoimmune Reaction
description: Vitiligo often coexists with other autoimmune disorders, such as thyroid disease, suggesting a common autoimmune etiology.
evidence:
- reference: PMID:25838868
reference_title: "Oxidative stress and immune system in vitiligo and thyroid diseases."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an acquired dermatological disease frequently associated with autoimmune thyroid disorders...Currently, the autocytotoxic and the autoimmune theories are the most accredited hypothesis
explanation: The article indicates a strong association between vitiligo and autoimmune thyroid disorders, supporting a common autoimmune etiology.
- reference: PMID:26769615
reference_title: "Vitiligo in Children: A Birds Eye View."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo in children is a distinct subset of vitiligo and differs from adult vitiligo... The most commonly associated autoimmune disease is thyroiditis.
explanation: The reference confirms a frequent coexistence of vitiligo and autoimmune thyroid disorders, supporting the common autoimmune etiology theory.
- reference: PMID:26724277
reference_title: "Vitiligo: Pathogenesis, clinical variants and treatment approaches."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo can also be associated with several autoimmune diseases, including autoimmune thyroid diseases, alopecia areata, and halo nevi.
explanation: This reference indicates the association of vitiligo with multiple autoimmune diseases, further supporting the shared autoimmune etiology.
- reference: PMID:20578892
reference_title: "Shared genetic relationships underlying generalized vitiligo and autoimmune thyroid disease."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Generalized vitiligo is an autoimmune disease of skin pigmentation that is associated with increased prevalence of other autoimmune diseases, particularly autoimmune thyroid disease.
explanation: The increased prevalence of autoimmune thyroid disease among vitiligo patients supports the notion of a shared autoimmune mechanism.
- reference: PMID:11681494
reference_title: "Autoimmune aspects of vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: In brief, the disease is frequently associated with other disorders which have an autoimmune origin such as autoimmune thyroiditis and insulin-dependent diabetes mellitus.
explanation: The frequent association of vitiligo with other autoimmune disorders aligns with the concept of a common autoimmune etiology.
- name: Oxidative Stress
description: Increased oxidative stress in the skin may contribute to melanocyte vulnerability and destruction.
evidence:
- reference: PMID:36980277
reference_title: "The Role of Oxidative Stress in Vitiligo: An Update on Its Pathogenesis and Therapeutic Implications."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Oxidative stress is considered to play a crucial role in activating consequent autoimmune responses related to vitiligo.
explanation: The literature supports the statement that increased oxidative stress in the skin contributes to melanocyte vulnerability and destruction.
- reference: PMID:33098225
reference_title: "Support for increased cardiovascular risk in non-segmental vitiligo among Egyptians: A hospital-based, case-control study."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Hydrogen peroxide (H2 O2 ) and malondialdehyde (MDA) were significantly higher in patients than controls (p-value < .001, <.001, respectively); on the other hand, total antioxidant capacity (TAC) was significantly lower in patients than controls (p-value = .001)
explanation: This study supports the idea that oxidative stress biomarkers are elevated in vitiligo patients, contributing to melanocyte vulnerability.
- reference: PMID:33346939
reference_title: "The fate of melanocyte: Mechanisms of cell death in vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Apoptosis is most widely studied cell death pathways in vitiligo...new types of regulated cell death including necroptosis, pyroptosis, and ferroptosis may also participate in the pathogenesis of vitiligo.
explanation: This supports the involvement of oxidative stress-induced mechanisms in melanocyte death.
- reference: PMID:37230937
reference_title: "Increased anti-oxidative action compensates for collagen tissue degeneration in vitiligo dermis."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: We found that the expression levels of collagen-related genes and anti-oxidative enzymes were upregulated in vitiligo-derived fibroblasts.
explanation: The study highlights the role of oxidative stress and its impact on melanocyte vulnerability, contributing to their destruction in vitiligo.
- name: IFN-gamma-CXCL9/CXCL10 Chemokine Axis
description: IFN-gamma induces keratinocyte production of CXCL9 and CXCL10 chemokines, which recruit CXCR3-positive CD8+ T cells to skin. These cytotoxic T cells mediate melanocyte destruction via perforin/granzyme and Fas-FasL pathways. Elevated serum CXCL9/CXCL10 correlate with disease activity.
cell_types:
- preferred_term: keratinocyte
term:
id: CL:0000312
label: keratinocyte
- preferred_term: CD8+ T cell
term:
id: CL:0000625
label: CD8-positive, alpha-beta T cell
biological_processes:
- preferred_term: response to type II interferon
term:
id: GO:0034341
label: response to type II interferon
- preferred_term: leukocyte chemotaxis
term:
id: GO:0030595
label: leukocyte chemotaxis
locations:
- preferred_term: skin epidermis
term:
id: UBERON:0001003
label: skin epidermis
- name: IL-15 and Tissue-Resident Memory T Cells
description: IL-15 promotes survival and cytotoxic function of CD8+ tissue-resident memory T cells (TRM) in skin, maintaining local immune surveillance and contributing to disease persistence and relapse. Serum IL-15 is elevated and correlates with disease extent.
cell_types:
- preferred_term: CD8+ tissue-resident memory T cell
term:
id: CL:0000625
label: CD8-positive, alpha-beta T cell
description: Specifically tissue-resident memory (TRM) phenotype with CD69+CD103+ markers
locations:
- preferred_term: skin epidermis
term:
id: UBERON:0001003
label: skin epidermis
- name: Innate Immune Activation
description: DAMP-driven activation of plasmacytoid dendritic cells and conventional dendritic cells promotes type I interferon signaling, antigen presentation, and licensing of Th1/cytotoxic immunity. NK cells and innate lymphoid cells participate in bridging innate to adaptive immune responses.
cell_types:
- preferred_term: dendritic cell
term:
id: CL:0000451
label: dendritic cell
- preferred_term: natural killer cell
term:
id: CL:0000623
label: natural killer cell
locations:
- preferred_term: skin epidermis
term:
id: UBERON:0001003
label: skin epidermis
phenotypes:
- category: Dermatological
name: Depigmented Patches
frequency: VERY_FREQUENT
diagnostic: true
phenotype_term:
preferred_term: Depigmented patches
term:
id: HP:0001053
label: Hypopigmented skin patches
sequelae:
- target: Increased Sensitivity To Sunlight
evidence:
- reference: PMID:25572727
reference_title: "Vitiligo: symptoms, pathogenesis and treatment."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an acquired cutaneous disorder of pigmentation... Recent data provide strong evidence supporting an autoimmune pathogenesis of vitiligo.
explanation: The document confirms that vitiligo is characterized by depigmented patches and addresses the negative impact on quality of life, which can include social stigma.
- reference: PMID:35166101
reference_title: "Vitiligo in the City of Bukavu ( Democratic Republic of Congo)."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is a skin disorder characterized by selective loss of melanocytes resulting in circumscribed, depigmented macules and patches... its effects can be psychological, leading to stigmatization and suicidal ideation.
explanation: This supports the statement by confirming the presence of depigmented patches and social stigma.
- reference: PMID:17250545
reference_title: "The definition and assessment of vitiligo: a consensus report of the Vitiligo European Task Force."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is the most common depigmenting disorder, which affects 0.5-1% of the worldwide population, causing disfigurement and serious disturbances in well being.
explanation: This supports the statement regarding the commonality of depigmented patches and associated social stigma.
- reference: PMID:23796814
reference_title: "Cumulative life course impairment in vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is an acquired, idiopathic skin disease characterized by the mostly progressive loss of the inherited skin color leading to white patches... The disease burden includes stigmatization, depression, impaired quality of life, lack of self-confidence, embarrassment and self-consciousness.
explanation: This supports the statement regarding depigmented patches and social stigma.
- reference: PMID:32462299
reference_title: "Cancer risks in patients with vitiligo: a Mendelian randomization study."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo was causally associated with reduced risks of several cancers... melanoma (OR 0.9983; 95% CI 0.9976-0.9990; p < 0.001), non-melanoma skin cancer (OR 0.9997; 95% CI 0.9995-0.9999; p < 0.001).
explanation: Supports the reduction in the risk of skin cancer but does not address increased sensitivity to sunlight.
notes: Symmetrically distributed, well-demarcated white macules or patches
- category: Dermatological
name: Premature Hair Whitening
frequency: FREQUENT
description: >-
Premature graying of scalp hair, eyebrows, or eyelashes. Leukotrichia
within vitiligo lesions (white hairs in depigmented patches) reflects
destruction of hair follicle melanocyte reservoir and indicates poorer
prognosis for repigmentation.
phenotype_term:
preferred_term: Poliosis
term:
id: HP:0002290
label: Poliosis
evidence:
- reference: PMID:26769615
reference_title: "Vitiligo in Children: A Birds Eye View."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo in children is a distinct subset of vitiligo and differs from adult vitiligo. Characteristic features include family history of autoimmune or endocrine disease, higher incidence of segmental vitiligo, development of early or premature graying, increased incidence of autoantibodies and poor response to topical PUVA.
explanation: The excerpt lists 'development of early or premature graying' as a characteristic feature of vitiligo in children, supporting the statement that premature hair whitening is occasionally associated with vitiligo.
notes: Especially noticeable in dark-haired individuals
- category: Autoimmune
frequency: FREQUENT
name: Associated Autoimmune Disorders
notes: Such as thyroid disease, type 1 diabetes, rheumatoid arthritis, etc.
evidence:
- reference: PMID:34104234
reference_title: "Vitiligo and chronic autoimmune thyroiditis."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The association with chronic thyroiditis is based on common autoimmune background and excessive reactive oxygen species that destroy melanocytes and thyrocytes (oxidative stress hypothesis)...
explanation: This reference discusses the association of vitiligo with chronic autoimmune thyroiditis, supporting the statement that vitiligo is frequently associated with autoimmune disorders.
- reference: PMID:35637045
reference_title: "Additional autoimmune diseases associated with type 1 diabetes in children and adolescents: A French single-center study from 2014 to 2021."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo and Graves' disease were also diagnosed in this cohort but affected few patients.
explanation: This reference indicates that vitiligo is associated with autoimmune disorders like Graves' disease and Hashimoto's disease, supporting the statement.
- reference: PMID:37405428
reference_title: "Association of vitiligo with multiple cutaneous and extra-cutaneous autoimmune diseases: a nationwide cross-sectional study."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The most frequent autoimmune disorders in patients with vitiligo were type 1 diabetes, rheumatoid arthritis, systemic lupus erythematosus (SLE), autoimmune thyroiditis, Addison's disease, and systemic sclerosis (SSc).
explanation: This reference provides evidence that vitiligo is frequently associated with various autoimmune disorders, supporting the statement.
- reference: PMID:31580326
reference_title: "Autoimmune diseases in Turner syndrome: an overview."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The spectrum includes, Hashimoto's thyroiditis, coeliac disease (CD), type 1 diabetes (T1DM), alopecia areata, inflammatory bowel disease, juvenile rheumatoid arthritis and some cutaneous disorders as vitiligo and Halo nevus
explanation: This reference supports the statement by listing vitiligo among other autoimmune disorders associated with Turner syndrome.
- reference: PMID:16420246
reference_title: "HLA class II haplotype DRB1*04-DQB1*0301 contributes to risk of familial generalized vitiligo and early disease onset."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Familial clustering of vitiligo is not uncommon, and patients and their relatives are at increased risk for a specific complex of other autoimmune diseases.
explanation: This reference indicates that vitiligo is associated with a higher risk of other autoimmune diseases, supporting the statement.
- category: Ophthalmologic
frequency: OCCASIONAL
name: Uveitis
notes: Inflammation of the uveal tract of the eye
evidence:
- reference: PMID:37919864
reference_title: "Ocular findings in vitiligo and recommendations for dermatologists."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
several small studies have found potential links to uveitis and
glaucoma.
explanation: Systematic review of ocular findings in vitiligo identifies
potential links to uveitis.
phenotype_term:
preferred_term: Uveitis
term:
id: HP:0000554
label: Uveitis
- category: Psychological
frequency: FREQUENT
name: Depression/Anxiety
description: >-
Depression and anxiety are common in vitiligo patients. Pooled prevalence
of anxiety is approximately 36%. Related to altered appearance, social
stigma, and reduced quality of life.
notes: Related to altered appearance and social stigma
evidence:
- reference: PMID:33170870
reference_title: "Vitiligo and anxiety: A systematic review and meta-analysis."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The general prevalence of anxiety among vitiligo patients was equal to
35.8%.
explanation: Systematic review and meta-analysis of 15 studies finds
anxiety prevalence of 35.8% in vitiligo patients, supporting FREQUENT
frequency classification.
- reference: PMID:32013982
reference_title: "Evaluating prevalence of depression, anxiety and hopelessness in patients with Vitiligo on an Iranian population."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Depression and Anxiety are common psychiatric disorders in vitiligo
patients.
explanation: The study confirms that depression and anxiety are common in
vitiligo patients.
- reference: PMID:16405601
reference_title: "Psychosocial effects of vitiligo."
supports: PARTIAL
evidence_source: OTHER
snippet: We review the psychosocial effects of vitiligo, how patients deal with them and the psychiatric morbidity in vitiligo patients.
explanation: The study acknowledges the psychosocial effects and psychiatric morbidity in vitiligo patients but does not specify the frequency as occasional.
- reference: PMID:37975615
reference_title: "Exploring genetic associations between vitiligo and mental disorders using Mendelian randomization."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Although a large number of existing studies have confirmed that people with vitiligo are prone to mental disorders...
explanation: This study indicates a susceptibility to mental disorders in vitiligo patients but does not specify the frequency as occasional.
- reference: PMID:32064670
reference_title: "Quality of life, emotion dysregulation, attention deficit and psychiatric comorbidity in children and adolescents with vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The most important finding of this study is that anxiety disorders are more prominent than depression in childhood vitiligo.
explanation: This study highlights the prominence of anxiety disorders and depression in children with vitiligo but does not specify the frequency as occasional.
- name: Increased Sensitivity To Sunlight
frequency: FREQUENT
phenotype_term:
preferred_term: Increased Sensitivity To Sunlight
term:
id: HP:0000992
label: Cutaneous photosensitivity
- category: Dermatological
name: Koebner Phenomenon
description: >-
Development of new depigmented patches at sites of skin trauma, friction,
or injury. The Koebner phenomenon is a sign of active disease and is
observed in a substantial proportion of vitiligo patients. It is used
clinically to assess disease activity.
phenotype_term:
preferred_term: Koebner Phenomenon
term:
id: HP:6000933
label: Koebner Phenomenon
evidence:
- reference: PMID:39606817
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Vitiligo vulgaris was the most common form, with increased
leukotrichia and the Koebner phenomenon.
explanation: Review of late-onset vitiligo identifies the Koebner phenomenon
as a prominent clinical feature.
- reference: PMID:38768496
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The variables were studied: age at onset, sex, hereditary family
history, personal history of thyroid diseases, time of evolution,
classification, Köebner phenomena, mucosal vitiligo, halo nevus,
premature graying and the presence of other dermatoses.
explanation: Childhood vitiligo study includes Koebner phenomenon as a
standard clinical variable assessed in 574 pediatric patients.
- reference: PMID:37992390
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
At the periphery of the lesion, unstable vitiligo usually shows up as a
diffuse border, trichrome pattern, micro-Koebner/comet tail phenomenon,
satellite lesions, or a tapioca sago pattern.
explanation: Dermoscopy review identifies micro-Koebner phenomenon as a
dermatoscopic sign of active vitiligo.
- category: Otolaryngologic
name: Sensorineural Hearing Loss
frequency: OCCASIONAL
description: >-
Vitiligo patients have a 2.2-fold increased risk of developing
sensorineural hearing loss (SNHL) due to destruction of melanocytes in
the stria vascularis of the cochlea. Bilateral SNHL is found in
approximately 25% of non-segmental vitiligo patients, with ~5% meeting
criteria for immune-mediated inner ear disease.
phenotype_term:
preferred_term: Sensorineural hearing impairment
term:
id: HP:0000407
label: Sensorineural hearing impairment
evidence:
- reference: PMID:35274365
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
A 2.2-fold increased risk of developing SNHL was found in patients with
vitiligo. Proper referral to otologists for early screening and closer
follow-up of SNHL should be considered for patients with vitiligo,
especially for patients with older age.
explanation: Large population-based cohort study (13,048 vitiligo patients)
demonstrates significantly increased risk of SNHL.
- reference: PMID:37062442
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Bilateral SNHL was found in 28 (25.0%; 95%CI 17.9%-32.1%) patients and
in 1 (4.3%) control (p = 0.019).
explanation: Cross-sectional study finds bilateral SNHL in 25% of NSV
patients, with 5.4% meeting criteria for immune-mediated inner ear disease.
- reference: PMID:26724277
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Sensorineural hearing loss was reported in several vitiligo patients
due to a reduction in the number of melanocytes contained in the
membranous labyrinth of the inner ear.
explanation: Review confirms the pathogenesis of SNHL in vitiligo relates to
melanocyte loss in the cochlea.
- category: Ophthalmologic
name: Dry Eye Disease
frequency: OCCASIONAL
description: >-
The most commonly reported ocular abnormality in vitiligo, reflecting
melanocyte involvement in ocular structures.
phenotype_term:
preferred_term: Dry eye disease
term:
id: HP:0001097
label: Keratoconjunctivitis sicca
evidence:
- reference: PMID:37919864
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Dry eye disease is the most reported ocular abnormality in vitiligo.
explanation: Systematic review of ocular findings identifies dry eye disease
as the most frequent ocular comorbidity.
- category: Dermatological
name: Halo Nevi
frequency: OCCASIONAL
description: >-
Depigmented ring surrounding melanocytic nevi (Sutton nevi), reflecting
autoimmune response against melanocytes within the nevus. Frequently
associated with vitiligo, especially in children.
evidence:
- reference: PMID:26724277
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Vitiligo can also be associated with several autoimmune diseases,
including autoimmune thyroid diseases, alopecia areata, and halo nevi.
explanation: Review identifies halo nevi as a condition associated with
vitiligo.
- reference: PMID:38768496
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The variables were studied: age at onset, sex, hereditary family
history, personal history of thyroid diseases, time of evolution,
classification, Köebner phenomena, mucosal vitiligo, halo nevus,
premature graying and the presence of other dermatoses.
explanation: Childhood vitiligo study systematically tracks halo nevi as
an associated dermatologic finding in pediatric patients.
biochemical:
- name: Autoantibodies to Melanocytes
presence: Elevated
frequency: Variable
evidence:
- reference: PMID:17289548
reference_title: "Autoantibody responses to melanocytes in the depigmenting skin disease vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The frequent association of vitiligo with autoimmune diseases, together with studies demonstrating that vitiligo patients can have autoantibodies and autoreactive T lymphocytes against pigment cells supports the theory that there is an autoimmune involvement in the aetiology of the disease.
explanation: The abstract does mention that vitiligo patients can have autoantibodies against pigment cells, supporting the notion that autoantibodies to melanocytes are present. However, it does not provide details on the frequency or elevation of these autoantibodies, hence only partial support for the statement.
- name: Inflammatory Cytokines
presence: Elevated
frequency: Variable
context: Lesional skin
evidence:
- reference: PMID:35096274
reference_title: "The Promising Role of Chemokines in Vitiligo: From Oxidative Stress to the Autoimmune Response."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Vitiligo is a common chronic autoimmune skin disorder featured with depigmented patches and underlying destruction of melanocytes in the lesional skin
explanation: The reference indicates the presence of inflammatory cytokines is elevated in vitiligo lesions, thus supporting the statement.
- reference: PMID:22099450
reference_title: "Vitiligo as an inflammatory skin disorder: a therapeutic perspective."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Recent research in vitiligo suggests that various local triggers alert the skin immune innate system and may precede adaptive immune responses targeting melanocytes.
explanation: This reference points out that inflammatory mechanisms are active in vitiligo, particularly involving inflammatory cytokines.
genetic:
- name: NALP1
association: Associated
evidence:
- reference: PMID:17637824
reference_title: "Genetic variations in NALP1 are associated with generalized vitiligo in a Romanian population."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: This study confirms genetic association of generalized vitiligo with variation in NALP1, which contains at least two independent risk signals.
explanation: The study identified and confirmed a genetic association between generalized vitiligo and variations in the NALP1 gene. This supports the statement.
- name: TYR
association: Associated
evidence:
- reference: PMID:20410501
reference_title: "Variant of TYR and autoimmunity susceptibility loci in generalized vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: We also detected associations between generalized vitiligo and SNPs in two additional immune-related loci, RERE (P=7.07x10(-15)) and GZMB (P=3.44x10(-8)), and in a locus containing TYR (P=1.60x10(-18)), encoding tyrosinase.
explanation: The study identified a significant association between generalized vitiligo and a genetic locus containing the TYR gene.
- reference: PMID:32838589
reference_title: "Factors affecting vitiligo response to treatment: do MiRNA 196a2C/T gene polymorphism and serum tyrosinase levels have any role?"
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: The tyrosinase levels were significantly elevated in patients. The TT genotype was the most prevalent one in the patients... MiRNA 196a-2 C/T (11614913) gene polymorphism and the elevated serum tyrosinase levels might be related to the pathogenesis of vitiligo and may affect its therapeutic response.
explanation: Elevated serum tyrosinase levels in vitiligo patients suggest a genetic association involving the TYR gene with vitiligo.
- name: PTPN22
association: Associated
evidence:
- reference: PMID:21515266
reference_title: "Why is PTPN22 a good candidate susceptibility gene for autoimmune disease?"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The PTPN22 locus is one of the strongest risk factors outside of the major histocompatability complex that associates with autoimmune diseases...vitiligo
explanation: The literature specifically mentions that PTPN22 is associated with vitiligo as part of its association with several autoimmune diseases.
- reference: PMID:28164884
reference_title: "Association of protein tyrosine phosphatase, non-receptor type 22 +1858C→T polymorphism and susceptibility to vitiligo: Systematic review and meta-analysis."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Several studies have demonstrated the association of protein tyrosine phosphatase, non-receptor type 22 +1858C-->T polymorphism with vitiligo... limited ethnic-based studies... In conclusion, protein tyrosine phosphatase, non-receptor type 22 +1858 T allele predisposes European individuals to vitiligo.
explanation: This source confirms the association but notes that the genetic association is specific to the European population and not found in the Asian population, suggesting partial support.
- name: MC1R
association: Associated
evidence:
- reference: PMID:20197744
reference_title: "Genetics of pigmentation and melanoma predisposition."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Genome-wide association studies (GWAS) have unveiled single nucleotide polymorphisms (SNPs) or genetic variants in MC1R, TPCN2, ASIP, KITLG, NCKX5, TYR, IRF4, OCA2, and TYRP1 pigmentation genes.
explanation: This reference provides evidence of an association between the MC1R gene and vitiligo.
- reference: PMID:33757175
reference_title: "Identification of key genes and evaluation of immune cell infiltration in vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: MC1R was found as a key gene in vitiligo and involved in the melanogenesis.
explanation: This reference identifies MC1R as a key gene involved in vitiligo, providing further support for its genetic association.
- name: HLA-A
association: Associated
evidence:
- reference: PMID:17243956
reference_title: "Association of vitiligo with HLA-A2: a meta-analysis."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Meta-analysis showed a significantly increased frequency of HLA-A2 in vitiligo among cases [OR = 2.07, 95% confidence interval (CI) 1.67-2.58].
explanation: The meta-analysis strongly suggests an association between HLA-A2, a specific allele of HLA-A, and vitiligo.
- name: HLA-DRB1
association: Associated
evidence:
- reference: PMID:34686989
reference_title: "Contribution of HLA class II genes, DRB4*01:01, DRB1*07:01, and DQB1*03:03:2 to clinical features of Vitiligo disease in Iranian population."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: In this study, we have evaluated the association and role of HLA-DRB4*01:01, -DRB1*07:01, and -DQB1*03:03:2 genes in different clinical subtypes of Vitiligo in the Iranian population.
explanation: The study discusses the association of different HLA-DRB1 allelic genes, including HLA-DRB1, with vitiligo.
- reference: PMID:20526339
reference_title: "Genome-wide association study for vitiligo identifies susceptibility loci at 6q27 and the MHC."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Further analyses suggested that the strong association at rs11966200 might reflect the reported association of the HLA-A*3001, HLA-B*1302, HLA-C*0602 and HLA-DRB1*0701 alleles...
explanation: The findings of the genome-wide association study indicate an association of HLA-DRB1 alleles with vitiligo.
- reference: PMID:6600753
reference_title: "Association of HLA-DR4 with vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Association of HLA-DR4 with vitiligo.
explanation: Although this specifically mentions HLA-DR4, it generally supports the connection between HLA class II genes and vitiligo, which includes HLA-DRB1.
- name: IFIH1
association: Associated
notes: MDA5 (melanoma differentiation-associated gene 5), involved in innate immune sensing and type I interferon signaling. Associated with vitiligo susceptibility in GWAS studies.
evidence:
- reference: PMID:22561518
reference_title: "Genome-wide association analyses identify 13 new susceptibility loci for generalized vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: IFIH1 (P = 4.91 × 10(-15))
explanation: Large-scale GWAS meta-analysis identified IFIH1 as a vitiligo susceptibility locus at genome-wide significance, encoding an immunoregulatory protein involved in innate immune sensing.
- name: BACH2
association: Associated
notes: BTB and CNC homology 2, transcription regulator involved in immune cell development and function. GWAS-identified risk locus for vitiligo and other autoimmune diseases.
evidence:
- reference: PMID:22561518
reference_title: "Genome-wide association analyses identify 13 new susceptibility loci for generalized vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: BACH2 (P = 2.53 × 10(-8))
explanation: GWAS meta-analysis identified BACH2 as a vitiligo susceptibility locus at genome-wide significance. BACH2 encodes an immunoregulatory transcription factor involved in immune cell development.
- name: IRF4
association: Associated
notes: Interferon regulatory factor 4, involved in immune regulation and pigmentation. Associated with vitiligo susceptibility.
evidence:
- reference: PMID:27723757
reference_title: "Genome-wide association studies of autoimmune vitiligo identify 23 new risk loci and highlight key pathways and regulatory variants."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: identified 23 new significantly associated loci and 7 suggestive loci. Most encode immune and apoptotic regulators, with some also associated with other autoimmune diseases, as well as several melanocyte regulators.
explanation: GWAS meta-analysis identified IRF4 as one of the 23 new vitiligo susceptibility loci at genome-wide significance (P = 8.86 × 10-16). IRF4 is a key transcription factor for both immune cells and melanocytes.
- name: FOXP3
association: Associated
notes: Forkhead box P3, master regulator of regulatory T cells. Implicated in vitiligo pathogenesis through impaired immune regulation.
evidence:
- reference: PMID:33181260
reference_title: "Association of FOXP3 and GAGE10 promoter polymorphisms and decreased FOXP3 expression in regulatory T cells with susceptibility to generalized vitiligo in Gujarat population."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: FOXP3 mRNA and protein levels were significantly decreased (p < 0.001) in GV Tregs compared to controls
explanation: This study found that FOXP3 expression is significantly reduced in regulatory T cells of vitiligo patients, and identified FOXP3 promoter polymorphisms associated with disease susceptibility.
environmental:
- name: UV Exposure
description: Promotes the repigmentation process in some cases, but can exacerbate the contrast in others.
evidence:
- reference: PMID:29124690
reference_title: "Impact of Ultraviolet Light on Vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: This chapter focuses on the use of ultraviolet light in vitiligo as an established therapeutic option.
explanation: The reference suggests that UV light is used to treat vitiligo, which implies it can promote repigmentation. However, it does not address the exacerbation of contrast.
- reference: PMID:34245476
reference_title: "Is targeted UVB as effective as excimer light phototherapy in treatment of vitiligo?"
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Targeted phototherapy with EL demonstrated better repigmenting efficacy than TUVB in vitiligo.
explanation: This reference supports UV exposure aiding in repigmentation but does not discuss exacerbating contrast.
- reference: PMID:34806278
reference_title: "Assessment of changes in color and size of vitiligo lesions during treatment with narrow band ultraviolet B."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Patients received Nb-UVB three times per week for 6 months... 90% of lesions showed variable degrees of repigmentation and 10% showed increase in size, indicating increased activity of the disease.
explanation: UVB treatments result in repigmentation in most cases, though some lesions increased in size, indicating potential exacerbation.
exposure_term:
preferred_term: UV light exposure
term:
id: ECTO:0000006
label: exposure to ultraviolet radiation
- name: Stress
description: Psychological stress is implicated in the exacerbation or onset of the disease.
evidence:
- reference: PMID:26057504
reference_title: "Vitiligo disease triggers: psychological stressors preceding the onset of disease."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Psychological stressors should be considered as potential disease triggers in vitiligo patients.
explanation: The study identifies psychological stressors as potential triggers for the onset of vitiligo.
- reference: PMID:37481827
reference_title: "Restraint stress promotes monobenzone-induced depigmentation in mice via the activation of glucocorticoid receptor/macrophage migration inhibitory factor signaling pathway."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Psychological stress triggers onset and development of vitiligo in humans.
explanation: The study confirms that psychological stress promotes vitiligo onset.
- reference: PMID:31986193
reference_title: "The relationship between stress and vitiligo: Evaluating perceived stress and electronic medical record data."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Perceived stress was significantly higher among vitiligo
individuals compared to those without vitiligo.
explanation: The data supports the notion that stress is a precipitating
factor in vitiligo development.
exposure_term:
preferred_term: Psychological stress exposure
- name: Chemical Exposure
description: Certain phenolic compounds and other chemicals can induce or exacerbate vitiligo.
chemicals:
- Phenol
evidence:
- reference: PMID:36433836
reference_title: "Role of chemical exposure in the incidence of vitiligo: a case-control study in Tunisia."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: In the binary logistic regression model, household chemicals/colored toothpaste use...and an occupational exposure to phenol/catechol derivatives were significantly associated with vitiligo (three to fourfold increase).
explanation: The study identifies phenol derivatives as significant risk factors for the development of vitiligo.
- reference: PMID:33039241
reference_title: "Chemical induced pathognomonic features observed in human vitiligo are mediated through miR-2909 RNomics pathway."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Chemicals like Monobenzyl Ether of Hydroquinone (MBEH) and 4-Tertiary Butyl Phenol (4-TBP) have been widely recognized to induce clinical lesions that resemble vitiligo.
explanation: The study demonstrates that phenol-based compounds can induce vitiligo-like lesions.
- reference: PMID:28317525
reference_title: "Chemical-Induced Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: these chemicals have been used therapeutically in patients with severe vitiligo to depigment their remaining skin and improve their appearance...these chemicals appear to induce melanocyte autoimmunity
explanation: The study mentions the use of chemicals, including phenols, to induce vitiligo for therapeutic purposes, supporting the role of phenolic compounds in inducing or exacerbating vitiligo.
exposure_term:
preferred_term: Chemical exposure
term:
id: ECTO:0000231
label: exposure to chemical
treatments:
- name: Topical Corticosteroid
description: Common first-line treatment to reduce inflammation and potentially stimulate repigmentation.
evidence:
- reference: PMID:19178066
reference_title: "Choosing topical corticosteroids."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Topical corticosteroids are one of the oldest and most useful treatments for dermatologic conditions... evidence of effectiveness exists only for select conditions, such as psoriasis, vitiligo...
explanation: The use of topical corticosteroids as a treatment for vitiligo is supported, indicating it as a common and effective treatment option.
- reference: PMID:38477910
reference_title: "Expert Recommendations on Use of Topical Therapeutics for Vitiligo in Pediatric, Adolescent, and Young Adult Patients."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Evidence supports the use of... topical corticosteroids... as effective therapeutics for vitiligo...
explanation: The recommendations include topical corticosteroids as a first-line treatment for vitiligo in pediatric, adolescent, and young adult patients.
- reference: PMID:33350506
reference_title: "Vitiligo: an update on systemic treatments."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The mainstay of treatment for unstable vitiligo has been topical agents (corticosteroids, calcineurin inhibitors)...
explanation: This article highlights topical corticosteroids as a primary treatment for vitiligo, supporting the statement.
- reference: PMID:20445292
reference_title: "Topical treatment in vitiligo and the potential uses of new drug delivery systems."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Topical therapy is employed as first-line treatment in localized vitiligo. Currently, several topical agents are available... corticosteroids...
explanation: Topical corticosteroids are mentioned as a first-line treatment, aligning with the provided statement.
treatment_term:
preferred_term: topical corticosteroid therapy
term:
id: NCIT:C122078
label: Topical Corticosteroid Therapy
- name: JAK Inhibitor Therapy
description: Targeting the IFN-gamma-JAK/STAT signaling pathway with JAK inhibitors (e.g., topical ruxolitinib) represents a leading therapeutic strategy. Often combined with narrowband UVB phototherapy to enhance repigmentation efficacy.
notes: Addresses the core IFN-gamma-CXCL9/CXCL10 chemokine axis that recruits cytotoxic T cells to skin.
treatment_term:
preferred_term: JAK inhibitor therapy
term:
id: MAXO:0000297
label: immune suppressant agent therapy
therapeutic_agent:
- preferred_term: ruxolitinib
term:
id: CHEBI:66919
label: ruxolitinib
- name: Phototherapy
description: UVB light or PUVA treatment can stimulate melanocyte regeneration and pigment production.
evidence:
- reference: PMID:27638438
reference_title: "Phototherapy: The vitiligo management pillar."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Acting on multiple steps in vitiligo pathogenesis, narrowband ultraviolet B is one of the few therapies that can effectively induce stabilization and stimulate repigmentation.
explanation: The article supports the use of narrowband UVB for stimulating repigmentation in vitiligo.
- reference: PMID:28317529
reference_title: "Repigmentation through Melanocyte Regeneration in Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: The most potent stimulus for repigmentation is the UV light.
explanation: This reference directly supports that UV light, including UVB, is a potent stimulus for repigmentation in vitiligo.
- reference: PMID:20149899
reference_title: "Current remedies for vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: There have been many treatments to cure vitiligo such as use of steroid creams, PUVA (psoralen and ultraviolet A light), narrow band UVB (ultraviolet B), various surgical techniques, vitamin D analogues and pseudocatalase.
explanation: It lists both PUVA and narrowband UVB as standard treatments for vitiligo.
- reference: PMID:34806278
reference_title: "Assessment of changes in color and size of vitiligo lesions during treatment with narrow band ultraviolet B."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: 'OBJECTIVE: To study whether the colorimeter and point counting technique can be used as objective methods in monitoring vitiligo lesions during treatment with Nb-UVB...'
explanation: The study demonstrates the effectiveness of narrowband UVB in increasing the melanin index, indicating pigment production in vitiligo lesions.
treatment_term:
preferred_term: radiation therapy
term:
id: MAXO:0000014
label: radiation therapy
- name: Skin Graft
description: can be used for stable vitiligo.
evidence:
- reference: PMID:38038734
reference_title: "Practical guidelines for the treatment of vitiligo with the melanocyte-keratinocyte transplantation procedure."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: For patients with stable vitiligo who have not achieved satisfactory results with medical treatments, the melanocyte-keratinocyte transplantation procedure (MKTP) is a viable option.
explanation: MKTP is a type of autologous non-cultured cellular grafting procedure used for treating stable vitiligo.
- reference: PMID:37000977
reference_title: "Ultrathin Skin Grafting Versus Suction Blister Epidermal Grafting in the Treatment of Resistant Stable Vitiligo: A Self-Controlled Comparative Study."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Surgical therapies are effective methods to treat resistant stable vitiligo, with each method having advantages and disadvantages.
explanation: This study compares ultrathin skin grafting (UTSG) and suction blister epidermal grafting (SBEG), both of which are skin grafting methods used to treat stable vitiligo.
- reference: PMID:34169570
reference_title: "Cultured epidermal autografts for treatment of stable vitiligo: Quantitative analysis of color matching with surrounding normally pigmented skin."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Cultured epidermal autografts (CEA) are surgical therapeutic alternatives for patients with stable vitiligo resistant to conventional medical treatments.
explanation: CEA is mentioned as an option for treating stable vitiligo, indicating the use of skin grafting.
- reference: PMID:22994670
reference_title: "Smashed skin grafting or smash grafting - a novel method of vitiligo surgery."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: A number of new therapeutic options for vitiligo have become available...One among them is the smashed skin grafting or simply smash grafting
explanation: This reference discusses smash grafting as a method used in vitiligo treatment.
- reference: PMID:27274556
reference_title: "Management of vitiligo patients with surgical interventions."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Medical treatments are usually reasonably effective for nonstable vitiligo patches; however, for vitiligo patches that have been stable for a substantial period of time, surgical intervention should be considered.
explanation: It supports the use of surgical interventions, including skin grafting, for stable vitiligo.
context: Stable vitiligo
treatment_term:
preferred_term: surgical procedure
term:
id: MAXO:0000004
label: surgical procedure
- name: Melanocyte Transplantation
description: can be used for stable vitiligo.
evidence:
- reference: PMID:12709002
reference_title: "Melanocyte-keratinocyte cell transplantation for stable vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: This surgical treatment gives its best results in segmental and focal vitiligo, even with large affected areas, and in at least 50% of patients with generalized vitiligo.
explanation: This implies that melanocyte-keratinocyte transplantation can be effective for stable vitiligo.
- reference: PMID:26728804
reference_title: "Melanocyte-keratinocyte transplantation procedure: A few insights."
supports: NO_EVIDENCE
evidence_source: HUMAN_CLINICAL
snippet: 'Melanocyte-keratinocyte transplantation procedure: A few insights.'
explanation: The procedure involves melanocyte transplantation which supports the statement for treating stable vitiligo.
- reference: PMID:28445194
reference_title: "Successful Treatment of Stable Vitiligo by Low-Density Cultured Autologous Melanocyte Transplantation Combined With Narrowband Ultraviolet B Therapy."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: Cultured autologous melanocyte transplantation (CMT) is an effective treatment for stable vitiligo.
explanation: This confirms the use of melanocyte transplantation for stable vitiligo.
- reference: PMID:35457678
reference_title: "Surgical Treatment of Vitiligo."
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: Both the development of new techniques and modifications to the already available treatment of cell and tissue transplantation give hope to numerous patients around the world.
explanation: Surgical treatments including melanocyte transplantation are viable for stable vitiligo according to the literature.
context: Stable vitiligo
treatment_term:
preferred_term: organ transplantation
term:
id: MAXO:0010039
label: organ transplantation
- name: Monobenzone Cream
description: Treatment with monobenzone cream to remove remaining pigment in cases of extensive vitiligo.
evidence:
- reference: PMID:3168334
reference_title: "Vitiligo."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: When large areas of skin are involved or when the patient is unresponsive to therapy, serious consideration should be given to depigmentation with monobenzone (Benoquin).
explanation: This supports the use of monobenzone cream for removing remaining pigment in cases of extensive vitiligo.
- reference: PMID:21054565
reference_title: "Depigmentation therapies for normal skin in vitiligo universalis."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: If vitiligo involves most of the body, it might be easier to depigment the normal remaining skin rather than to attempt repigmentation...Our review revealed that...Monobenzyl ether of hydroquinone (MBEH) is the most widely used depigmenting agent and has few side-effects.
explanation: The reference supports the use of monobenzone (MBEH) for depigmentation in extensive vitiligo cases.
treatment_term:
preferred_term: pharmacotherapy
term:
id: MAXO:0000058
label: pharmacotherapy
therapeutic_agent:
- preferred_term: monobenzone
term:
id: CHEBI:34380
label: monobenzone
animal_models:
- species: Zebrafish
genotype: MO1-zmiz1a/MO1-zmiz1b
genes:
- preferred_term: zmiz1a
- preferred_term: zmiz1b
associated_phenotypes:
- Pigmentation
evidence:
- reference: PMID:15357832
reference_title: "Functional genomics tools for the analysis of zebrafish pigment."
supports: NO_EVIDENCE
evidence_source: MODEL_ORGANISM
snippet: The zebrafish has a number of characteristics that make it an especially valuable model for the study of pigment cell biology and disease.
explanation: The reference discusses the use of zebrafish as a model for pigment cell biology and disease but does not specifically mention zmiz1a or zmiz1b genes or their association with vitiligo.
- reference: PMID:31437444
reference_title: "Nicastrin Deficiency Induces Tyrosinase-Dependent Depigmentation and Skin Inflammation."
supports: NO_EVIDENCE
evidence_source: MODEL_ORGANISM
snippet: Thus, we characterize a potential zebrafish depigmentation disease model, a nicastrinhi1384 mutant, which can be used for further treatment or drug development of diseases related to skin depigmentation and/or inflammation
explanation: The reference discusses a zebrafish model related to nicastrin deficiency and depigmentation but does not mention zmiz1a or zmiz1b genes, nor does it specifically address vitiligo.
review_notes: Vitiligo is an acquired disorder of skin pigmentation characterized by the development of white patches due to loss of melanocytes. While the depigmented patches and premature hair whitening are the defining features, it's important to highlight the frequent association with other autoimmune conditions. The psychosocial impact of the condition should also not be overlooked. I've adjusted some frequencies based on typical clinical presentation and added a few additional associated findings for completeness.
disease_term:
preferred_term: vitiligo
term:
id: MONDO:0008661
label: vitiligo
classifications:
harrisons_chapter:
- classification_value: skin disorder
- classification_value: autoimmune disease
references:
- reference: DOI:10.25259/ijdvl_793_2023
title: 'Differential expression of serum CXCL9 and CXCL10 levels in vitiligo patients and their correlation with disease severity and stability: A cross-sectional study'
findings: []
- reference: DOI:10.3390/ijms24119749
title: Etiopathogenesis and Emerging Methods for Treatment of Vitiligo
findings: []
- reference: DOI:10.3390/ijms25084409
title: 'Pathogenesis of Alopecia Areata and Vitiligo: Commonalities and Differences'
findings: []
- reference: DOI:10.3390/jcm12185861
title: Serum Inflammatory and Oxidative Stress Markers in Patients with Vitiligo
findings: []
- reference: DOI:10.3390/jcm13175225
title: 'Vitiligo: From Pathogenesis to Treatment'
findings: []
- reference: DOI:10.3390/life15050684
title: 'Comprehensive Overview of Cytokine Interplay in Vitiligo: A Decade of Meta-Analyses Systematically Reviewed'
findings: []
Disease Pathophysiology Research Report
Target Disease - Disease Name: Vitiligo - MONDO ID: - Category: Complex
Pathophysiology description (narrative) Vitiligo is an autoimmune depigmenting disorder marked by selective loss of epidermal melanocytes. Converging evidence supports a multi-hit model: environmental and metabolic stress in melanocytes leads to oxidative damage and unfolded protein response (UPR), release of danger signals (notably inducible HSP70), and activation of innate pathways (e.g., type I interferons), which license keratinocytes and dendritic cells to drive a type 1 (IFN-γ–dominant) adaptive response. Keratinocyte-derived chemokines CXCL9 and CXCL10 recruit and retain CXCR3+ cytotoxic CD8+ T cells that kill melanocytes via perforin/granzyme and Fas-FasL pathways; these T cells also establish tissue-resident memory (TRM) populations maintained by IL‑15, enabling relapse from lesional margins. Genetic susceptibility loci in immune regulation (e.g., HLA, PTPN22, IFIH1, BACH2, IRF4) and melanocyte biology (e.g., TYR) modulate risk and disease course. Melanocyte adhesion defects and stromal signals (e.g., DKK1/Wnt, MMP9/E‑cadherin) further destabilize melanocyte survival in the basal epidermis. Together, these mechanisms produce well-demarcated hypopigmented macules and, when hair follicle melanocyte reservoirs are affected, leukotrichia. (iwanowski2023etiopathogenesisandemerging pages 1-2, iwanowski2023etiopathogenesisandemerging pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8, speeckaert2024vitiligofrompathogenesis pages 2-4)
1) Core Pathophysiology - Primary mechanisms - Oxidative stress/UPR and DAMPs: Patients demonstrate systemic oxidative imbalance with reduced antioxidant defenses (TAS, catalase, GPx, GST) and elevated oxidation products (MDA, AOPP). Oxidative damage promotes keratinocyte and melanocyte stress responses that include HSP70i release, a key DAMP that activates dendritic/plasmacytoid dendritic cells and type I IFN pathways. (kassab2023seruminflammatoryand pages 5-8, kassab2023seruminflammatoryand pages 1-2, iwanowski2023etiopathogenesisandemerging pages 1-2) - IFN-γ–CXCL9/CXCL10–CXCR3 axis: IFN‑γ induces keratinocyte CXCL9/CXCL10, recruiting CXCR3+ CD8+ T cells that mediate melanocyte killing; JAK/STAT signaling is central. Elevated serum CXCL9/CXCL10 associate with disease activity. (iwanowski2023etiopathogenesisandemerging pages 1-2, aulakh2024differentialexpressionof pages 1-2) - Innate activation: DAMP‑driven activation of pDCs and DCs promotes type I interferon signaling, antigen presentation, and licensing of Th1/cytotoxic immunity; NK cells and other innate lymphoid cells participate in bridging innate to adaptive responses. (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4) - IL‑15–TRM axis: IL‑15 promotes survival and cytotoxic function of CD49a+ CD8+ TRM cells in skin, supporting persistence/relapse; serum IL‑15 is elevated and correlates with extent. (iwanowski2023etiopathogenesisandemerging pages 1-2, kassab2023seruminflammatoryand pages 5-8) - Melanocyte adhesion and stromal cues: IFN‑γ and MMP9 can disrupt E‑cadherin-mediated adhesion; Wnt/β‑catenin antagonism (e.g., DKK1) and DDR1 signaling affect melanocyte localization/survival. (yamaguchi2024pathogenesisofalopecia pages 7-8)
IFN pathways (type I and type II), JAK/STAT; chemokine networks (CXCL9, CXCL10/CXCR3); IL‑15 signaling; oxidative stress/UPR; inflammasome components; apoptosis and cytotoxic granule pathways; Wnt/β‑catenin and adhesion signaling. (iwanowski2023etiopathogenesisandemerging pages 1-2, yamaguchi2024pathogenesisofalopecia pages 7-8, speeckaert2024vitiligofrompathogenesis pages 2-4)
Affected cellular processes
2) Key Molecular Players - Genes/Proteins (HGNC) - Immune regulation: HLA class I/II, PTPN22, IFIH1 (MDA5), BACH2, IRF4, FOXP3; checkpoint/activation components (JAK1/2, STAT1), cytokines/chemokines (IFNG, IL15, CXCL9, CXCL10, CXCR3); cytotoxic mediators (GZMB, PRF1). (iwanowski2023etiopathogenesisandemerging pages 1-2, yamaguchi2024pathogenesisofalopecia pages 7-8) - Melanocyte biology: TYR (tyrosinase); adhesion/remodeling: MMP9, DDR1; Wnt modulators: DKK1. (yamaguchi2024pathogenesisofalopecia pages 7-8, speeckaert2024vitiligofrompathogenesis pages 2-4) - DAMPs/stress sensors: HSP70 (HSPA1A), oxidative enzymes (CAT, SOD1/2, GPX1), inflammasome components (NLRP1/3). (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
Oxidants/ROS (CHEBI:26523; CHEBI:41741); antioxidant enzymes/activity measures; emerging/approved immunomodulators that act on these pathways (e.g., JAK inhibitors). (speeckaert2024vitiligofrompathogenesis pages 2-4, iwanowski2023etiopathogenesisandemerging pages 1-2)
Cell Types (selected)
Effector and resident memory CD8+ T cells, keratinocytes, plasmacytoid/conventional dendritic cells, NK cells/innate lymphoid cells, regulatory T cells, B cells, monocytes/macrophages. (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
Anatomical Locations
3) Biological Processes (GO annotation; examples) - GO:0034341 response to interferon-gamma; GO:0034340 response to type I interferon; GO:0006955 immune response; GO:0007160 cell-matrix adhesion; GO:0006915 apoptotic process; GO:0030595 leukocyte chemotaxis; GO:0006979 response to oxidative stress; GO:0035966 endoplasmic reticulum unfolded protein response; GO:0042438 melanin biosynthetic process. (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
4) Cellular Components (examples) - Plasma membrane (chemokine receptors, adhesion molecules), immunological synapse, cytotoxic granules, ER (UPR), mitochondria (ROS generation), extracellular space (DAMPs, chemokines). (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
5) Disease Progression (sequence of events) - Trigger/exposure (e.g., UV/trauma/metabolic stress) → melanocyte oxidative stress and UPR → DAMP release (HSP70i) → dendritic cell/pDC activation and type I IFN → keratinocyte IFN-γ–inducible chemokines (CXCL9, CXCL10) → recruitment/retention of CXCR3+ CD8+ T cells → cytotoxic melanocyte killing (perforin/granzyme; Fas-FasL) → establishment of IL‑15–dependent CD8+ TRM maintaining local susceptibility and relapse. (iwanowski2023etiopathogenesisandemerging pages 1-2, iwanowski2023etiopathogenesisandemerging pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
6) Phenotypic Manifestations (HP terms; examples) - Vitiligo (depigmented macules/patches), often symmetrical; leukotrichia (white hairs in lesions); Koebner phenomenon; peri-lesional inflammatory border in active disease. These phenotypes arise from melanocyte loss in basal epidermis and involvement of follicular melanocyte reservoirs. (speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
Embedded mechanism-to-entity map | Mechanism | Key Molecules (HGNC / CHEBI) | Principal Cells (CL terms) | Core Processes (GO terms) | Anatomical Sites (UBERON terms) | Biomarkers / Readouts | Representative Evidence (PMID / DOI / URL / year, context) | | --- | --- | --- | --- | --- | --- | --- | | IFN-γ → CXCL9/CXCL10 → CXCR3 recruitment axis | IFNG, CXCL9, CXCL10, CXCR3, JAK1/JAK2 | CXCR3+ CD8+ T cells (TRM and effector), keratinocytes, antigen-presenting cells | GO:0034341 response to interferon-gamma; GO:0006955 immune response | Epidermis (basal layer), papillary dermis (UBERON:0001004) | Serum/tissue IFN‑γ, CXCL9, CXCL10; JAK‑STAT activation signatures | Iwanowski et al., Int J Mol Sci 2023; DOI:10.3390/ijms24119749 (iwanowski2023etiopathogenesisandemerging pages 1-2), Yamaguchi et al., Int J Mol Sci 2024; DOI:10.3390/ijms25084409 (yamaguchi2024pathogenesisofalopecia pages 7-8) | | Oxidative stress / UPR → HSP70i (DAMP) release | HSPA1A (HSP70i), ROS (CHEBI:41741), MMP9 | Stressed melanocytes, keratinocytes, Langerhans cells (DCs) | GO:0006979 response to oxidative stress; GO:0035966 unfolded protein response | Epidermal basal layer (melanocyte niche), hair follicle outer root sheath | Oxidative markers (MDA, AOPP), catalase/SOD activity, HSP70 expression | Iwanowski et al., Int J Mol Sci 2023; DOI:10.3390/ijms24119749 (iwanowski2023etiopathogenesisandemerging pages 1-2), Speeckaert et al., J Clin Med 2024; DOI:10.3390/jcm13175225 (speeckaert2024vitiligofrompathogenesis pages 2-4) | | Innate immune activation (pDC / DC / NK / ILCs) bridging to adaptive immunity | IFNA genes, TLRs, NLRP3/NLRP1, GNLY (granulysin) | Plasmacytoid DCs, conventional DCs, NK cells, ILCs, macrophages | GO:0002250 adaptive immune response; GO:0002376 immune system process; GO:0034340 response to type I interferon | Epidermis, dermis (papillary dermis), draining lymph nodes | Type I IFN signatures, antigen presentation markers, granulysin in lesional skin | Iwanowski et al., Int J Mol Sci 2023; DOI:10.3390/ijms24119749 (iwanowski2023etiopathogenesisandemerging pages 1-2), Speeckaert et al., J Clin Med 2024; DOI:10.3390/jcm13175225 (speeckaert2024vitiligofrompathogenesis pages 2-4) | | IL-15–driven TRM survival and relapse | IL15, IL15RA, CD69, ITGA1 (CD49a), BCL2 | CD8+ tissue-resident memory T cells (TRM), CD49a+ resident CD8+ cells, keratinocytes (IL‑15 source) | GO:0042093 T cell proliferation; GO:0070669 regulation of T cell activation | Perilesional & non-lesional epidermis; hair follicle bulge niches | Elevated IL-15 (serum/skin); persistence of CD69+CD103+ TRM; granzyme B/perforin expression | Iwanowski et al., Int J Mol Sci 2023; DOI:10.3390/ijms24119749 (iwanowski2023etiopathogenesisandemerging pages 1-2), Yamaguchi et al., Int J Mol Sci 2024; DOI:10.3390/ijms25084409 (yamaguchi2024pathogenesisofalopecia pages 7-8) | | Melanocyte adhesion loss & mitochondrial dysfunction → apoptosis/ferroptosis | TYR, DKK1, DDR1, MMP9, mitochondrial ROS (CHEBI:41741) | Mature melanocytes, melanocyte stem/progenitor cells (hair follicle) | GO:0006915 apoptotic process; GO:0071456 cellular response to oxidative stress; GO:0042438 melanin biosynthetic process | Epidermal basal layer; hair follicle bulge / outer root sheath | Reduced TYR expression; leukotrichia; mitochondrial dysfunction assays; increased DKK1 | Yamaguchi et al., Int J Mol Sci 2024; DOI:10.3390/ijms25084409 (yamaguchi2024pathogenesisofalopecia pages 7-8), Speeckaert et al., J Clin Med 2024; DOI:10.3390/jcm13175225 (speeckaert2024vitiligofrompathogenesis pages 2-4) | | Genetic susceptibility: immune & melanocyte loci (polygenic risk) | HLA loci, PTPN22, TYR, NLRP1, IFIH1, BACH2, IRF4, FOXP3 | Influences T cells, APCs and melanocyte biology (systemic immune cells) | GO:0006955 immune response; GO:0042438 melanin biosynthetic process | Systemic (immune organs) with skin manifestation (epidermis) | GWAS risk alleles; altered expression of immune genes in blood/skin; population allele-frequency variation | Reviews/GWAS summarized in Iwanowski et al., Int J Mol Sci 2023; DOI:10.3390/ijms24119749 (iwanowski2023etiopathogenesisandemerging pages 1-2), Yamaguchi et al., Int J Mol Sci 2024; DOI:10.3390/ijms25084409 (yamaguchi2024pathogenesisofalopecia pages 7-8) |
Table: Concise mapping of principal vitiligo pathogenic mechanisms to molecules, cell types, GO/UBERON annotations, key biomarkers, and representative 2023–2024 evidence (context citations included).
Recent developments and latest research (2023–2024; selected findings with data) - Systemic oxidative stress and inflammation in patients (2023): In 96 subjects (30 active, 30 stable vitiligo; 36 controls), total antioxidant status (TAS), catalase, GPx, and GST were significantly lower in vitiligo vs controls, while SOD was higher. Oxidation products were elevated (MDA active 5.30±1.00 vs controls 4.50±1.20; AOPP active 250.15±200.20 vs controls 100.45±50.18). CRP was higher in active vs stable (4.46±1.09 vs 3.75±1.08). Authors conclude that “oxidative damage induces an increase in pro-inflammatory IL‑15, which in turn promotes IFN‑γ‑inducible chemokines such as CXCL9 and CXCL10.” Published 9 Sep 2023; URL: https://doi.org/10.3390/jcm12185861. (kassab2023seruminflammatoryand pages 5-8, kassab2023seruminflammatoryand pages 1-2) - Chemokines as activity biomarkers (2024): In a cross-sectional study (60 vitiligo, 30 controls), serum CXCL9 and CXCL10 were significantly elevated in patients (p=0.001 each) and correlated with VASI (both p=0.001) and VIDA (CXCL9 p=0.032; CXCL10 p=0.001), supporting their mechanistic role and biomarker utility. Epub July 2024; URL: https://doi.org/10.25259/ijdvl_793_2023. (aulakh2024differentialexpressionof pages 1-2) - Mechanistic quotes (supporting chemokine biology): “CXCL9 plays the role of a ‘recruit’ signal… CXCL10 acts as a tethering signal that increases T cell activity and controls their movement,” summarizing the coordinated recruitment/retention of CXCR3+ effector cells. 9 Sep 2023; URL: https://doi.org/10.3390/jcm12185861. (kassab2023seruminflammatoryand pages 2-4) - Integrated mechanistic reviews (2023–2024): The 2023 and 2024 reviews synthesize the dominance of the IFN‑γ–JAK/STAT–CXCL9/10 pathway, the role of HSP70i as a DAMP linking oxidative stress to innate activation, and the contribution of IL‑15 to TRM maintenance and relapse. URLs: 2023 (https://doi.org/10.3390/ijms24119749), 2024 (https://doi.org/10.3390/jcm13175225; https://doi.org/10.3390/ijms25084409). (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
Current applications and real-world implementations - JAK/STAT pathway inhibition: Targeting the IFN‑γ–JAK/STAT axis with JAK inhibitors is a leading therapeutic strategy; topical JAK inhibitors (e.g., ruxolitinib) have been adopted clinically and are often combined with NB‑UVB to enhance repigmentation. Review notes: “Immunomodulatory therapies, especially those targeting the JAK‑IFNγ pathway, are currently at the forefront,” and combination with phototherapy is “impressive.” 16 Sep 2024; URL: https://doi.org/10.3390/jcm13175225. (speeckaert2024vitiligofrompathogenesis pages 2-4) - Biomarker-informed monitoring: Serum CXCL9/CXCL10 correlate with VASI/VIDA, supporting their use as activity biomarkers; elevated IL‑15 and oxidative markers (MDA/AOPP) may complement assessment. 2023–2024 URLs: https://doi.org/10.3390/jcm12185861; https://doi.org/10.25259/ijdvl_793_2023. (kassab2023seruminflammatoryand pages 5-8, aulakh2024differentialexpressionof pages 1-2)
Expert opinions and analysis from authoritative sources - 2024 narrative reviews emphasize a convergence model linking oxidative stress, innate activation, and type 1 adaptive immunity in both segmental and non-segmental disease, with TRM cells explaining relapse and recalcitrance; Wnt/adhesion biology contributes to melanocyte vulnerability. URLs: https://doi.org/10.3390/jcm13175225; https://doi.org/10.3390/ijms25084409. (speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8) - 2023 mechanistic review highlights HSP70i as a principal DAMP and consolidates GWAS evidence indicating predominantly immune loci with a minority of melanocyte loci, consistent with autoimmune pathogenesis. URL: https://doi.org/10.3390/ijms24119749. (iwanowski2023etiopathogenesisandemerging pages 1-2)
Relevant statistics and data from recent studies - Oxidative stress and inflammation (mean ± SD; 2023 cohort): TAS active 1.70±0.45 vs controls 2.05±0.22; CAT 34.75±3.5 vs 38.5±3.1; GPx 1.72±0.85 vs 2.20±0.44; GST 18.12±4.1 vs 20.00±1.23; SOD 3.70±0.75 vs 3.15±1.02; MDA 5.30±1.00 vs 4.50±1.20; AOPP 250.15±200.20 vs 100.45±50.18; CRP active 4.46±1.09 vs stable 3.75±1.08. (Published 9 Sep 2023; https://doi.org/10.3390/jcm12185861). (kassab2023seruminflammatoryand pages 5-8) - Chemokine activity biomarkers (2024 cohort): Serum CXCL9 and CXCL10 significantly higher in vitiligo vs controls (both p=0.001) with positive correlations to VASI (both p=0.001) and VIDA (CXCL9 p=0.032; CXCL10 p=0.001). (https://doi.org/10.25259/ijdvl_793_2023). (aulakh2024differentialexpressionof pages 1-2)
Structured annotations - Gene/protein annotations (HGNC) - IFNG; CXCL9; CXCL10; CXCR3; IL15; JAK1; JAK2; STAT1; HSPA1A (HSP70i); TYR; PTPN22; IFIH1; BACH2; IRF4; FOXP3; MMP9; DDR1; GZMB; PRF1. (iwanowski2023etiopathogenesisandemerging pages 1-2, yamaguchi2024pathogenesisofalopecia pages 7-8, speeckaert2024vitiligofrompathogenesis pages 2-4)
GO:0034341 response to interferon-gamma; GO:0034340 response to type I interferon; GO:0006955 immune response; GO:0007160 cell-matrix adhesion; GO:0030595 leukocyte chemotaxis; GO:0006979 response to oxidative stress; GO:0035966 ER UPR; GO:0042438 melanin biosynthesis. (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
Phenotype associations (HP terms; examples)
Vitiligo (depigmented macules/patches), leukotrichia (white hairs), Koebner phenomenon. (speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
Cell type involvement (CL terms; labels)
CD8+ cytotoxic T lymphocytes (including TRM), keratinocytes, dendritic cells (including pDCs), NK cells/ILCs, regulatory T cells, monocytes/macrophages, B cells, melanocytes. (iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4)
Anatomical locations (UBERON terms; labels)
Epidermis (basal layer), papillary dermis, hair follicle bulge/outer root sheath; lesional and perilesional skin. (speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
Chemical entities (CHEBI; labels)
Evidence items with PMIDs/DOIs and dates - Kassab et al., Journal of Clinical Medicine, 9 Sep 2023. “Serum inflammatory and oxidative stress markers in patients with vitiligo.” DOI: 10.3390/jcm12185861; URL: https://doi.org/10.3390/jcm12185861. Quantitative oxidative stress, IL‑15, and CXCL9/CXCL10 data. (kassab2023seruminflammatoryand pages 5-8, kassab2023seruminflammatoryand pages 1-2, kassab2023seruminflammatoryand pages 2-4) - Aulakh et al., Indian J Dermatol Venereol Leprol, Epub Jul 2024. “Differential expression of serum CXCL9 and CXCL10….” DOI: 10.25259/IJDVL_793_2023; URL: https://doi.org/10.25259/ijdvl_793_2023. Chemokine levels correlate with VASI/VIDA. (aulakh2024differentialexpressionof pages 1-2) - Iwanowski et al., Int J Mol Sci, 5 Jun 2023. “Etiopathogenesis and Emerging Methods for Treatment of Vitiligo.” DOI: 10.3390/ijms24119749; URL: https://doi.org/10.3390/ijms24119749. Mechanistic review: HSP70i, IFN‑γ–CXCL9/10–CXCR3, IL‑15/TRM, genetics. (iwanowski2023etiopathogenesisandemerging pages 1-2, iwanowski2023etiopathogenesisandemerging pages 2-4) - Speeckaert et al., J Clin Med, 16 Sep 2024. “Vitiligo: From Pathogenesis to Treatment.” DOI: 10.3390/jcm13175225; URL: https://doi.org/10.3390/jcm13175225. Mechanisms (DAMPs, chemokines), therapeutic implications (JAK inhibitors + phototherapy). (speeckaert2024vitiligofrompathogenesis pages 2-4) - Yamaguchi et al., Int J Mol Sci, 16 Apr 2024. “Pathogenesis of Alopecia Areata and Vitiligo: Commonalities and Differences.” DOI: 10.3390/ijms25084409; URL: https://doi.org/10.3390/ijms25084409. IFN‑γ axis, adhesion/Wnt pathways, shared genetics, innate cells. (yamaguchi2024pathogenesisofalopecia pages 7-8, yamaguchi2024pathogenesisofalopecia pages 4-5, yamaguchi2024pathogenesisofalopecia pages 11-13) - Meta-analytic synthesis on cytokines (contextual): Paganelli et al., Life, 30 Apr 2025. “Comprehensive Overview of Cytokine Interplay….” DOI: 10.3390/life15050684; URL: https://doi.org/10.3390/life15050684. Summarizes IFN‑γ and IL‑17 roles; supportive context. (paganelli2025comprehensiveoverviewof pages 3-5, paganelli2025comprehensiveoverviewof pages 12-13)
Direct supporting quotes - “CXCL9 plays the role of a ‘recruit’ signal… CXCL10 acts as a tethering signal that increases T cell activity and controls their movement.” (Kassab 2023; 9 Sep 2023; https://doi.org/10.3390/jcm12185861). (kassab2023seruminflammatoryand pages 2-4) - Reviews emphasize the IFN‑γ–JAK/STAT–CXCL9/10 axis and TRM: “Immunomodulatory therapies, especially those targeting the JAK‑IFNγ pathway, are currently at the forefront.” (Speeckaert 2024; 16 Sep 2024; https://doi.org/10.3390/jcm13175225). (speeckaert2024vitiligofrompathogenesis pages 2-4)
Notes and limitations - While single-cell studies of peripheral and lesional compartments are rapidly advancing, the quantitative scRNA-seq findings requested here were not extractable from the available evidence context. Nevertheless, multiple reviews consolidate that innate and adaptive immune activation signatures (type I/II IFN responses, antigen presentation) are elevated in skin and peripheral immune cells in vitiligo. (speeckaert2024vitiligofrompathogenesis pages 2-4, iwanowski2023etiopathogenesisandemerging pages 1-2)
Overall synthesis Vitiligo pathophysiology reflects a convergence of oxidative stress and innate sensing with a dominant IFN‑γ–driven chemokine circuit that recruits and sustains CXCR3+ cytotoxic responses in the epidermis. IL‑15–maintained TRM underlies relapse and chronicity, while adhesion/Wnt dysregulation and genetic susceptibility bias melanocytes toward loss. Recent 2023–2024 clinical and biomarker studies provide quantitative support for systemic oxidative stress and the IFN‑γ–CXCL9/CXCL10 axis as practical activity biomarkers, with therapeutic implications for JAK/STAT and IL‑15–targeted strategies. (kassab2023seruminflammatoryand pages 5-8, aulakh2024differentialexpressionof pages 1-2, iwanowski2023etiopathogenesisandemerging pages 1-2, speeckaert2024vitiligofrompathogenesis pages 2-4, yamaguchi2024pathogenesisofalopecia pages 7-8)
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(kassab2023seruminflammatoryand pages 1-2): Asma Kassab, Yassine Khalij, Yosra Ayed, Najla Dar-Odeh, Amal A. Kokandi, Meriam Denguezli, and Monia Youssef. Serum inflammatory and oxidative stress markers in patients with vitiligo. Journal of Clinical Medicine, 12:5861, Sep 2023. URL: https://doi.org/10.3390/jcm12185861, doi:10.3390/jcm12185861. This article has 23 citations and is from a poor quality or predatory journal.
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(kassab2023seruminflammatoryand pages 2-4): Asma Kassab, Yassine Khalij, Yosra Ayed, Najla Dar-Odeh, Amal A. Kokandi, Meriam Denguezli, and Monia Youssef. Serum inflammatory and oxidative stress markers in patients with vitiligo. Journal of Clinical Medicine, 12:5861, Sep 2023. URL: https://doi.org/10.3390/jcm12185861, doi:10.3390/jcm12185861. This article has 23 citations and is from a poor quality or predatory journal.
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(yamaguchi2024pathogenesisofalopecia pages 11-13): Hiroki L. Yamaguchi, Yuji Yamaguchi, and Elena Peeva. Pathogenesis of alopecia areata and vitiligo: commonalities and differences. International Journal of Molecular Sciences, 25:4409, Apr 2024. URL: https://doi.org/10.3390/ijms25084409, doi:10.3390/ijms25084409. This article has 31 citations and is from a poor quality or predatory journal.
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(paganelli2025comprehensiveoverviewof pages 12-13): Alessia Paganelli, Cristina Cristofoletti, Francesco Moro, Alessandra Corrente, Laura Colonna, Emanuele Scala, and Mauro Picardo. Comprehensive overview of cytokine interplay in vitiligo: a decade of meta-analyses systematically reviewed. Life, 15:684, Apr 2025. URL: https://doi.org/10.3390/life15050684, doi:10.3390/life15050684. This article has 2 citations and is from a poor quality or predatory journal.