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Novel type of monogenic diabetes in patients with Welander distal myopathy

Hitherto unknown clinical findings show that patients with Welander distal myopathy (WDM), a dominantly inherited muscular disease, may be at increased risk of getting diabetes of an atypical form. WDM is caused by a mutation in TIA1, a key link to failure of insulin-producing cells in diabetes. AIM We will determine whether WDM patients have increased risk of diabetes and explore the causes and possibilities for treatment and prevention. METHODOLOGY Patients will drink a concentrated sugar solution on a single occasion. Blood samples are then collected on different time points over 2 hours for analyses of blood sugar and hormones. The results will be compared to relatives without WDM. Our PRELIMINARY RESULTS show that >30% of WDM patients have diagnosed diabetes, which is far more than expected and previously unknown. This overrepresentation of diabetes suggests that WDM and diabetes may have similar causes. The WDM TIA1 mutation causes loss of insulin production, promoting diabetes, an event prevented by the diabetes drug liraglutide. SIGNIFICANCE The diabetes in WDM patients may be a novel form of diabetes caused by their TIA1 mutation. The events causing diabetes in WDM patients may be possible to treat or prevent by already approved antidiabetic drugs (liraglutide). Beneficial effects of such drugs against muscular disease in humans have been recently reported. Additionally, the FDA has approved use of such a drug against muscular dystrophy.
Digital Object Identifier (DOI)
Grantee: Ake Sjoholm MD, PhD
Grant type: Research Grant
Award total: $94,414.00
Institution: Region Gavleborg
Country: Sweden