Type 1 Diabetes May Actually Be Two Different Diseases, Massive International Study Finds
A new disease route is discovered.
Researchers conducting an extensive international genome-wide association study have discovered evidence suggesting that type 1 diabetes may actually constitute two distinct disease variants rather than a single condition. The investigation, led by scientists from the United States and United Kingdom, analyzed genetic data from over 9,000 type 1 diabetes patients and 14,000 control subjects to examine differences linked to two genetic patterns known as HLA-DR3 and HLA-DR4.
While both genetic signatures result in type 1 diabetes, the study revealed that the underlying biological mechanisms differ significantly between them. Patients with the HLA-DR3 pattern showed stronger involvement of mast cells, immune components associated with allergies and inflammation, whereas those with HLA-DR4 displayed greater activity in T cells, which directly attack the pancreatic beta cells responsible for insulin production. The genetic distinctions between these two subtypes are as pronounced as those separating schizophrenia from bipolar disorder.
This breakthrough finding carries substantial implications for medical treatment approaches. Understanding that type 1 diabetes may develop through different biological pathways could enable clinicians to tailor therapies more precisely to individual patients based on their genetic profile. Researchers suggest that future clinical trials should separately analyze results for HLA-DR3 and HLA-DR4 patients, and recommend incorporating genetic background considerations into ongoing diabetes research and risk prediction models.
The findings, published in Diabetologia, establish a foundation for more targeted prevention strategies and personalized treatment development in coming years.
Originally reported by Sciencealert →
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