RepurpOS

MCAS (Mast Cell Activation Syndrome)

Disease intelligence for Mast Cell Activation Syndrome: 49 alterations and 0 ranked therapeutics from curated public databases.

Disease overview

Alterations
49
Molecular (A)
0
Clinical (B–E)
49
Direct drugs
0
Via biomarker
0
Natural agents
0
Natural products
0
Merged ranked
24

Sources: Open Targets, HPO, ClinicalTrials.gov, PubMed Literature · Pipeline phase 6 · Updated 2026-07-10

Identifiers: MONDO: MONDO:0800103 · ORPHA: ORPHA:280795 · UMLS_CUI: C5680519

Right to Try Relevance

Eligibility: This disease meets the federal and state right-to-try legal standard (21 U.S.C. § 360bbb-0a and Montana SB 535): it lacks disease-modifying therapy with indication-specific FDA approval. Patients with Mast Cell Activation Syndrome may be eligible to access investigational therapies outside of clinical trials under right-to-try frameworks.
Investigational Agents
0
No investigational agents
Most Advanced Phase
Phase 0
Highest dev. stage
Gene Targets
49
Actionable
Pipeline Compounds (Top 6)
None identified
Legal Standard: Right-to-try requires the disease lacks "adequate approved therapy for that specific disease" (not symptom-management drugs). This distinction means a disease with antidepressants available still qualifies if no FDA approval exists for THAT disease indication.
View Right-to-Try Compendium

Alterations

49 total · Types A (molecular) through E (functional)

NameTypeSubtypeDirection FrequencyEvidenceSourcesLinks
Abnormal abdomen morphology Pathology Pathological finding Moderate HPO, Monarch
Anteverted nares Pathology Pathological finding Moderate HPO, Monarch
Aplasia/Hypoplasia of the cerebellar vermis Pathology Pathological finding Moderate HPO, Monarch
Ataxia Pathology Pathological finding Moderate HPO, Monarch
Cerebellar vermis hypoplasia Pathology Pathological finding Moderate HPO, Monarch
Cirrhosis Pathology Pathological finding Moderate HPO, Monarch
Coloboma Pathology Pathological finding Moderate HPO, Monarch
Dystonia Pathology Pathological finding Moderate HPO, Monarch
Elevated circulating hepatic transaminase concentration Lab / Clinical Lab value Moderate HPO, Monarch
Encephalocele Pathology Pathological finding Moderate HPO, Monarch
Esophageal varix Pathology Pathological finding Moderate HPO, Monarch
Generalized hypotonia Pathology Pathological finding Moderate HPO, Monarch
Global developmental delay Pathology Pathological finding Moderate HPO, Monarch
Growth delay Pathology Pathological finding Moderate HPO, Monarch
Hepatic fibrosis Pathology Pathological finding Moderate HPO, Monarch
Hepatomegaly Pathology Pathological finding Moderate HPO, Monarch
Hyperreflexia Pathology Pathological finding Moderate HPO, Monarch
Hypertelorism Pathology Pathological finding Moderate HPO, Monarch
Hypertension Pathology Pathological finding Moderate HPO, Monarch
Hypotonia Pathology Pathological finding Moderate HPO, Monarch
Intrahepatic bile duct dilatation Pathology Pathological finding Moderate HPO, Monarch
Moderate intellectual disability Functional Functional test Moderate HPO, Monarch
Molar tooth sign on MRI Pathology Pathological finding Moderate HPO, Monarch
Multiple small medullary renal cysts Pathology Pathological finding Moderate HPO, Monarch
Nephronophthisis Pathology Pathological finding Moderate HPO, Monarch
Nystagmus Pathology Pathological finding Moderate HPO, Monarch
Occipital encephalocele Pathology Pathological finding Moderate HPO, Monarch
Oculomotor apraxia Pathology Pathological finding Moderate HPO, Monarch
Optic disc pallor Pathology Pathological finding Moderate HPO, Monarch
Portal hypertension Pathology Pathological finding Moderate HPO, Monarch
Postaxial hand polydactyly Pathology Pathological finding Moderate HPO, Monarch
Ptosis Pathology Pathological finding Moderate HPO, Monarch
Renal cyst Pathology Pathological finding Moderate HPO, Monarch
Round face Pathology Pathological finding Moderate HPO, Monarch
Seizure Pathology Pathological finding Moderate HPO, Monarch
Spasticity Pathology Pathological finding Moderate HPO, Monarch
Splenomegaly Pathology Pathological finding Moderate HPO, Monarch
Stage 5 chronic kidney disease Pathology Pathological finding Moderate HPO, Monarch
Unilateral renal agenesis Pathology Pathological finding Moderate HPO, Monarch
Vascular dilatation Pathology Pathological finding Moderate HPO, Monarch
Wide mouth Pathology Pathological finding Moderate HPO, Monarch
Duration of Response Lab / Clinical Lab value Emerging ClinicalTrials.gov
Effectiveness of caregiver massage to reduce child and caregiver distress and promote child health-related quality of life Scales & PROs Clinical scale Emerging ClinicalTrials.gov
Incidence of Graft Rejection Lab / Clinical Lab value Emerging ClinicalTrials.gov
Incidence of Non-relapse Mortality Lab / Clinical Lab value Emerging ClinicalTrials.gov
Overall survival Lab / Clinical Lab value Emerging ClinicalTrials.gov
Probability of severe (grade III/IV) GVHD in each arm Lab / Clinical Lab value Emerging ClinicalTrials.gov
Quality of life Scales & PROs Clinical scale Emerging ClinicalTrials.gov
The Proportion of Participants Who Experienced a Systemic Allergic Reaction (CoFAR Grade 2+ Regardless of Tryptase or CoFAR Grade 1 With Elevated Tryptase) Within 90 Minutes Post-vaccination to the First Dose, Adjusting for Placebo. Lab / Clinical Lab value Emerging ClinicalTrials.gov

FDA-Approved Therapies

Phase 4 agents with regulatory approval for this indication

Drug NameMechanismType
Cetirizine Histamine H1 antagonist Gene-targeted
Cromolyn sodium Mast cell stabilizer Gene-targeted
Famotidine Histamine H2 antagonist Gene-targeted
Fexofenadine Histamine H1 antagonist Gene-targeted
Imatinib KIT inhibitor - PRIMARY THERAPY Gene-targeted
Ketotifen Mast cell stabilizer Gene-targeted
Loratadine Histamine H1 antagonist Gene-targeted
Ranitidine Histamine H2 antagonist Gene-targeted

Therapeutics

Direct disease associations, biomarker-linked drugs, OSMF narrative-review natural agents, and merged ranking. Only agents with registry trials or published clinical literature are shown by default.

No therapeutics in this section.

No therapeutics in this section.

DrugTypePhaseEvidence ScoreSourcesLinks
Imatinib Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Midostaurin Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Avapritinib Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Sorafenib Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Cromolyn sodium Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Ketotifen Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Cetirizine Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Fexofenadine Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Loratadine Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Famotidine Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Ranitidine Repurposing via MCAS Clinical Trial Small molecule Approved Strong 90
Astemizole Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Leukotriene modifiers Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
IVIG Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Interferon-alpha Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Infliximab Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Adalimumab Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Etanercept Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Tocilizumab Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Ruxolitinib Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Eculizumab Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Quercetin Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Luteolin Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90
Resveratrol Repurposing via MCAS Clinical Trial Small molecule Clinical trials Strong 90

Alterations and therapeutics are aggregated from public databases (Open Targets, HPO, ChEMBL, DGIdb, and others). Natural agents are candidates from OSMF narrative reviews on opensourcemed.info/chronic-disease.html — not approved treatments. This page is for research orientation only — not medical advice.