Researchers find vital clue in progression of Type 1 diabetes

Small insulin-producing cells die first

The study found that the smallest clusters of insulin-producing beta cells, along with isolated single cells dispersed throughout the pancreas, are the first to be destroyed when the immune system begins attacking the organ. This process appears to occur even before individuals show any clinical symptoms of the disease.

Warning sign of further immune damage

The early loss of these small cell clusters seems to precede the next stage of the disease, during which the immune system targets the larger and more critical groups of insulin-producing cells known as the islets of Langerhans.

“We did not expect that,” said senior author Dr. Clive H. Wasserfall of the UF Diabetes Institute. He noted that preserving the remaining larger islets could one day help delay or even prevent the onset of the disease.

Insights that could improve early detection

Understanding how Type 1 diabetes progresses provides a framework for developing strategies to slow the disorder, even as a cure remains elusive. The findings may also help doctors detect the disease earlier and intervene sooner.

Advanced imaging reveals key differences

Using advanced imaging techniques and computer analysis, researchers examined pancreatic tissue from the Network for Pancreatic Organ donors with Diabetes (nPOD), the world’s largest biorepository for Type 1 diabetes research. The analysis showed that smaller insulin-producing clusters disappear earlier, while larger islets remain largely intact in early-stage cases.

Explaining differences between children and adults

The findings may help explain why Type 1 diabetes progresses more rapidly in children than in adults. Younger patients naturally have more small islets, which may lead to faster loss of insulin production, while older individuals can retain some insulin function for years.