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Is Irritable Bowel Syndrome Genetic?
- Heritability
- ~57%
- Inheritance
- polygenic
- Key genes
- TNFSF15 SLC6A4
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IBS has heritability of ~57% from twin studies. Serotonin transporter and immune-signalling gene variants are implicated.
How Genetic Is Irritable Bowel Syndrome?
Irritable Bowel Syndrome involves complex interactions between multiple genes and environmental factors. Heritability estimates range up to 57%, though no single gene determines outcome on its own.
Key genes associated with Irritable Bowel Syndrome: TNFSF15 SLC6A4. 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 Irritable Bowel Syndrome?
Family history can be informative for Irritable Bowel Syndrome, but its predictive power is limited because many genes — each with small effects — combine with environmental influences. A family history of the condition may prompt earlier or more frequent screening.
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