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Is Alagille Syndrome Genetic?
- Heritability
- ~100%
- Inheritance
- autosomal-dominant
- Key genes
- JAG1 NOTCH2
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A multisystem disorder affecting the liver heart spine face and eyes caused by mutations in JAG1 or NOTCH2.
How Genetic Is Alagille Syndrome?
Alagille Syndrome has a strong genetic basis. Research estimates heritability at approximately 100%, meaning genetic factors account for the majority of variation in whether individuals develop this condition.
Key genes associated with Alagille Syndrome: JAG1 NOTCH2. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: MedlinePlus Genetics
Does Family History Matter for Alagille Syndrome?
Yes — family history is one of the strongest predictors of Alagille Syndrome. If a first-degree relative (parent, sibling, or child) has been diagnosed, your own risk may be significantly elevated. Discussing your family history with a healthcare provider or genetic counsellor is strongly recommended.
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