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Newly developed risk score more effective at identifying type 1 diabetes

Newly developed risk score more effective at identifying type 1 diabetes

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A new way of screening babies and adults for future risk of type 1 diabetes will be much more effective at identifying the condition than current methods, new research has concluded.

Researchers at the University of Exeter and the Pacific Northwest Research Institute in Seattle have developed a new risk score which takes into account detailed genetic information known to increase the chances of type 1 diabetes. This could be used to help identity babies at highest risk of developing the condition in the future. The score may also be used at the time of diabetes diagnosis to help decide if someone has type 1 or type 2 diabetes, which need very different treatments.

In a study published today (Thursday January 17) in Diabetes Care , the team found that their new risk score, the T1DGRS2, which uses detailed analysis of key regions of the genome, was nearly twice as efficient at identifying babies at high risk of type 1 diabetes as existing methods, which use more simplistic measures.

The research, funded by Diabetes UK, found the new test was also better at predicting type 1 diabetes in adults in the general population.

Senior author Dr Richard Oram said: “Prediction of what diseases we might get in the future is an important area, and type 1 diabetes has a strong genetic element that we are now able to measure very well. Measurement of the tye 1 diabetes genetic risk score could help predict who will develop the condition from early life could help with research into potential early life interventions, and with classifying diabetes correctly at diagnosis.”

To develop the test, the team analyzed genetic variation and gene interactions across the entire genome in 6,581 people with type 1 diabetes in the Type 1 Diabetes Genetics Consortium. They compared this to 9,247 control participants. This helped them incorporate all known and recently-discovered genetic elements that can indicate type 1 diabetes. They then conducted simulations to see how their test compared to current genetic methods of diagnosis and screening.

Type 1 diabetes develops when the body’s own immune system attacks insulin-producing beta cells in the pancreas. The immune attack usually begins several years before the symptoms of Type 1 diabetes appear. Being able to identify who’s will develop Type 1 diabetes before its onset could help parents and doctors identify the condition before it becomes severe, and help the development of effective treatments to prevent type 1 diabetes.

Current methods of early diagnosis involve measuring of islet autoantibodies–proteins in the blood indicating beta cell destruction. However, monitoring autoantibodies is expensive and dif?cult in young children.

The Exeter team recently discovered that half of all cases of Type 1 diabetes develop in adulthood and can often be misdiagnosed. But the new risk score can help distinguish between Type 1 and Type 2 diabetes, helping healthcare professionals to make the right diagnosis.

Co-author Dr William Hagopian, from the Pacific Northwest Research Institute in Seattle, said: “Gathering all this genetic information together allows the test to perform better. This makes prediction of type 1 diabetes among all children much more affordable in public health settings. Parents can be warned to watch for early symptoms to avoid hospitalization for life-threatening complications. Kids with the greatest future risk can get access to research trials to develop ways to delay or prevent progression to clinical diabetes.”

Anna Morris, Assistant Director of Research Strategy and Partnership at Diabetes UK, said: “It’s exciting to see the power of genetics being harnessed to help predict who might develop Type 1 diabetes in the future, particularly from a young age. If successful, this approach could help to reduce someone’s risk of being misdiagnosed or developing complications during diagnosis.

“In the future, this research could also open up new insights into what could be done to stop Type 1 diabetes from progressing.”

Source:

https://www.exeter.ac.uk/news/featurednews/title_700324_en.html

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