New pathway connected to type 2 diabetes
A cellular pathway that is responsible for keeping blood sugar levels low has been found, and may prevent the onset of type 2 diabetes. Following a meal, beta cells found in islets of the pancreas secrete insulin that helps to store food energy for future use. The inability of islet beta cells to produce enough insulin leads to diabetes. Unlike other research that has focused on how to replicate beta cells, this study focused on how to make pre-existing beta cells more functional, or better at secreting insulin.The research team, led by Canada Research Chair Dr. Robert Screaton, senior scientist at the CHEO Research Institute and associate professor at the University of Ottawa, started with a gene "knockout" strategy to remove a protein called SIK2 from all beta cells. They found that mice without SIK2 secrete less insulin during feeding because they fail to turn off a switch protein called p35, which prevents insulin secretion when blood sugar levels are low. The team also found that SIK2 works together with the protein PJA2 to turn off p35.
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