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Cross-provider research synthesis

Ataxia Telangiectasia

MONDO:0008840 Curated 2026-07-04T00:00:00Z 9 harmonized findings

falcon · 24 citations openscientist · 46 citations

Concordant asserts the finding Partial supports a weaker/qualified form Contradictory conflicts with it Silent does not address it

Harmonized findings

Ataxia-telangiectasia is an autosomal recessive multisystem disorder caused by biallelic loss-of-function variants in ATM, which encodes a serine/threonine protein kinase.

UNANIMOUS INTEGRATED

genetic_factorgene_function

Provider	Stance	Score	Evidence
falcon	CONCORDANT	90%	ATM is a serine/threonine kinase central to DNA double-strand break response/repair and cell-cycle checkpoint signaling Falcon names ATM as the causal gene and identifies its product as a serine/threonine kinase central to the DNA damage response. DOI:10.1016/j.celrep.2023.113622
openscientist	CONCORDANT	95%	Ataxia-telangiectasia (A-T) is an autosomal recessive primary immunodeficiency (PID) disease that is caused by mutations in ataxia-telangiectasia mutated (ATM) gene encoding a serine/threonine protein kinase. OpenScientist states the autosomal recessive inheritance, ATM causation, and the serine/threonine kinase identity of the gene product. PMID:30685876

ATM is the master kinase of the DNA double-strand break response; it is activated by DSBs (and oxidative stress) and phosphorylates a large network of downstream substrates, so its loss produces defective DSB repair and impaired checkpoint signaling.

UNANIMOUS INTEGRATED

pathophysiologygene_function

Provider	Stance	Score	Evidence
falcon	CONCORDANT	80%	leading to defective ATM kinase function and impaired DSB response, plus broader redox/mitochondrial/lysosomal effects Falcon frames the disease mechanism as defective ATM kinase function and impaired DSB response, adding broader redox/organelle roles.
openscientist	CONCORDANT	95%	ATM is a central kinase that activates an extensive network of responses to cellular stress via a signaling role. ATM is activated by DNA double strand breaks (DSBs) and by oxidative stress, subsequently phosphorylating a plethora of target proteins OpenScientist details ATM activation by DSBs and oxidative stress and its phosphorylation of a large substrate network. PMID:34573351

Residual ATM kinase activity drives a genotype-phenotype continuum: null variants with no kinase activity produce classical A-T, whereas hypomorphic variants with residual activity produce a milder variant phenotype with later onset and longer survival.

SINGLE INTEGRATED

genetic_factorprognosis

Provider	Stance	Score	Evidence
openscientist	CONCORDANT	95%	patients without ATM kinase activity showed the classical phenotype. The presence of ATM protein, correlated with slightly better immunological function. Residual kinase activity correlated with a milder and essentially different neurological phenotype, absence of telangiectasia, normal endocrine and pulmonary function, normal immunoglobulins, significantly lower X-ray hypersensitivity in lymphocytes, and extended lifespan OpenScientist reports the definitive genotype-phenotype study establishing residual kinase activity as the determinant of the classical-vs-variant continuum. PMID:22213089
falcon	SILENT	—	Falcon does not address the residual-kinase-activity genotype-phenotype correlation or a classical-vs-variant severity continuum.

ATM deficiency drives microglial activation and cGAS-STING/innate-immune neuroinflammation that promotes progressive cerebellar neurodegeneration.

UNANIMOUS INTEGRATED

pathophysiology

Provider	Stance	Score	Evidence
falcon	CONCORDANT	85%	show microglia-driven inflammatory activation and neuronal cytotoxicity, enabling mechanistic dissection and candidate therapeutic testing of neuroinflammatory pathways Falcon highlights the 2024 iPSC microglia/neuron work showing microglia-driven inflammatory activation and neuronal cytotoxicity, with cGAS-STING/NF-kB as the cell-intrinsic upstream program. DOI:10.1016/j.celrep.2023.113622
openscientist	CONCORDANT	90%	Loss of Atm in neurons and glia leads to accumulation of cytosolic DNA, increased cytokine production and constitutive activation of microglia consistent with a neuroinflammatory phenotype. Rats lacking ATM had significant loss of motor neurons and microgliosis in the spinal cord, consistent with onset of paralysis OpenScientist ties cytosolic-DNA-driven microglial activation and cGAS-STING neuroinflammation to neuronal loss, citing the ATM-deficient rat model. PMID:28007901

A-T causes a combined humoral and cellular immunodeficiency (IgA/IgG deficiency, lymphopenia, defective class-switch recombination) driving recurrent sinopulmonary infections.

UNANIMOUS INTEGRATED

phenotypepathophysiology

Provider	Stance	Score	Evidence
falcon	CONCORDANT	80%	IgA deficiency, IgG deficiency, and frequent T- and B-lymphopenia Falcon reports the characteristic immunoglobulin deficiencies and lymphopenia from the Latin American cohort and links recurrent infections to immunodeficiency. DOI:10.1007/s12026-024-09494-5
openscientist	CONCORDANT	90%	immunoglobulin deficiency in AT is caused by disturbed development of class-switched memory B cells. ATM deficiency affects both germinal center reaction and choice of DNA-repair pathway in class switching OpenScientist adds the mechanistic basis, attributing the immunoglobulin deficiency to defective class-switch recombination and memory B-cell development. PMID:38280573

A-T confers a markedly increased malignancy risk, with hematologic neoplasms (lymphoma/leukemia) predominating in childhood.

MAJORITY INTEGRATED

phenotypeprognosis

Provider	Stance	Score	Evidence
openscientist	CONCORDANT	90%	Among the 160 patients with AT, we observed 19 cases of childhood cancer (15 cases of lymphoma, three cases of leukemia, and one case of medulloblastoma) versus 0.32 expected OpenScientist quantifies the risk with a population-based German cohort (56-fold overall SIR), dominated by lymphoma and leukemia. PMID:34597127
falcon	PARTIAL	50%	with hematologic neoplasms predominating in younger individuals Falcon agrees hematologic neoplasms predominate in children but gives only a qualitative range (~10% minimum, 25-38% ceiling) rather than a quantified SIR relative risk, so it is concordant on concept but weaker on magnitude. DOI:10.1016/j.spen.2024.101169

Patients are extremely radiosensitive because of defective DSB repair, so ionizing radiation exposure (diagnostic and therapeutic) should be avoided in favor of radiation-free imaging.

UNANIMOUS INTEGRATED

treatmentdiagnosis

Provider	Stance	Score	Evidence
falcon	CONCORDANT	80%	clinical reviews explicitly recommend avoiding ionizing radiation when possible Falcon identifies ionizing radiation as the dominant environmental sensitivity (from impaired DSB repair) and states the avoidance recommendation. DOI:10.1016/j.spen.2024.101169
openscientist	CONCORDANT	90%	Diagnostic imaging with ionizing radiation should be avoided when possible; radiation-free techniques (US, MRI) are recommended OpenScientist concurs on radiosensitivity and specifies substitution of ultrasound/MRI for ionizing imaging. PMID:36186632

A-T is life-limiting: roughly half of patients survive to ~20 years, and cancer and respiratory tract infections are the leading, independently associated causes of death.

UNANIMOUS INTEGRATED

prognosis

Provider	Stance	Score	Evidence
openscientist	CONCORDANT	95%	Cancer (hazard ratio, 2.7; 95% CI, 1.6-4.5) and respiratory tract infections (hazard ratio, 2.3; 95% CI, 1.4-3.8) were independently associated with mortality OpenScientist cites the French cohort (Kaplan-Meier 20-year survival 53.4%) identifying cancer and respiratory infections as independent mortality drivers. PMID:21665257
falcon	CONCORDANT	80%	Cancer was reported as the leading cause of death, with infections also contributing substantially. Falcon's Latin American cohort independently reports a ~52.6% 20-year survival and names cancer (with infections) as the leading cause of death, concordant with OpenScientist's French-cohort figures. DOI:10.1007/s12026-024-09494-5

A-T has no curative therapy, so management is supportive and multidisciplinary, with encapsulated/intra-erythrocyte corticosteroid (dexamethasone) delivery among the leading disease-modifying candidates advancing through phase 3 trials.

UNANIMOUS LEAD

treatment

Provider	Stance	Score	Evidence
falcon	CONCORDANT	75%	Phase 3, randomized placebo-controlled; monthly infusions (every 28 days) Falcon details the EryDex (erythrocyte-encapsulated dexamethasone) NEAT phase 3 trial among the investigational therapies for otherwise supportive-only care. NCT06193200
openscientist	CONCORDANT	85%	Corticosteroids can improve neurological functioning in patients with the disorder but adrenal suppression and symptom recurrence on treatment discontinuation has limited their use, prompting the development of novel steroid delivery systems. OpenScientist covers the same encapsulated-corticosteroid rationale via the ATTeST phase 3 intra-erythrocyte dexamethasone trial, alongside supportive care. PMID:39152028

Narrative

Overview

Both providers frame ataxia-telangiectasia as an autosomal recessive, multisystem genomic-instability disorder caused by biallelic loss-of-function ATM variants, with the ATM serine/threonine kinase at the center of the DNA double-strand break response. From that shared molecular anchor they build the recognizable clinical picture: progressive cerebellar ataxia, oculocutaneous telangiectasia, combined immunodeficiency with recurrent sinopulmonary infection, marked radiosensitivity, and a high malignancy risk.

Agreement

The reports converge strongly on the core biology and clinical course: ATM as the causal DSB-response kinase; microglial/cGAS-STING neuroinflammation as a driver of cerebellar neurodegeneration; combined humoral/cellular immunodeficiency with class-switch defects; hematologic-predominant cancer predisposition; the imperative to avoid ionizing radiation; and a life-limiting prognosis in which cancer and respiratory infections are the leading causes of death. Notably, the survival figures agree despite coming from different cohorts (French ~53.4% vs Latin American ~52.6% 20-year survival), and both independently surface encapsulated/intra-erythrocyte dexamethasone as a leading emerging therapy.

Divergence

OpenScientist is the more comprehensive and quantitative report, contributing the residual-kinase-activity genotype-phenotype continuum (classical null vs variant hypomorphic disease), a 56-fold quantified cancer SIR, detailed mechanistic substrate and pathway lists, and cross-species/model-organism coverage. Falcon is leaner and cohort/trial-anchored, drawing on a 2024 Latin American registry and ClinicalTrials.gov records; it does not address the genotype-phenotype severity continuum (silent) and gives cancer risk only as a qualitative range rather than a relative risk. No genuine contradictions were found — divergence is coverage and quantification, not conflict.

Integration

The harmonized ATM-kinase/DSB mechanism, microglial cGAS-STING neuroinflammation, class-switch immunodeficiency, radiosensitivity-avoidance, hematologic cancer predisposition, and cancer/respiratory-infection mortality findings are strong, doubly-supported claims suitable for promotion into the disorder YAML's pathophysiology, phenotype, genetic, and prognosis sections. The residual-kinase genotype-phenotype continuum (OpenScientist-only but from the definitive study) is also promotable as a genetic/prognostic anchor.

Not integrated (leads)

The emerging encapsulated-corticosteroid therapies and other investigational agents (triheptanoin, NAD+ boosting, N-acetyl-L-leucine, mutation-specific ASO) are retained as research leads pending abstract-verified evidence rather than promoted as curated treatment mechanisms.

Cross-provider synthesis comparing the falcon (cohort/trial-anchored) and openscientist (comprehensive, 15-domain) deep-research reports for ataxia-telangiectasia. No CONTRADICTORY stances: the two reports diverge on coverage and quantification (genotype-phenotype continuum, cancer-risk magnitude), not on substance. best_matching_text values are verbatim excerpts from the cited report files; provider citations are recorded for provenance but literature evidence snippets are left for the main curation pipeline to verify.