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Is Type 1 Diabetes Genetic?
- Heritability
- ~80%
- Inheritance
- polygenic
- Key genes
- HLA-DQ HLA-DR INS
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An autoimmune disease destroying insulin-producing cells. HLA region explains ~50% of genetic risk; siblings have ~6% lifetime risk.
How Genetic Is Type 1 Diabetes?
Type 1 Diabetes involves complex interactions between multiple genes and environmental factors. Heritability estimates range up to 80%, though no single gene determines outcome on its own.
Key genes associated with Type 1 Diabetes: HLA-DQ HLA-DR INS. 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 Type 1 Diabetes?
Family history can be informative for Type 1 Diabetes, 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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