Understanding pancreatic beta cell connectivity

A tiny minority of insulin-producing beta cells—roughly 5%—act as pacemakers that orchestrate the activity of the rest of the islet, and this coordination breaks down in diabetes. Type 2 diabetes affects about 8% of adults worldwide, driven by failures in both insulin secretion and action. While pancreatic islets are known to be the sole source of insulin, why their size and composition are so consistent across species has remained unclear. The researchers have discovered that a small subset of beta cells, called hubs, control the timing and spread of insulin release across the islet. In diabetic models, these hubs are fewer and less effective. This project aims to identify the molecular signature of hub cells, track their behaviour in living animals after transplantation into the eye, and test how diabetes risk genes and remission treatments—such as bariatric surgery—alter hub-follower communication. If successful, this work would reveal whether disrupted beta cell connectivity is a fundamental cause of type 2 diabetes, not just a consequence. That could open the door to entirely new therapeutic strategies—drugs or interventions that restore or replace hub cell function—rather than simply managing blood sugar. For now, this is fundamental science: understanding how a micro-organ coordinates its cells. But similar discoveries about pacemaker cells in the heart led directly to pacemakers and anti-arrhythmic drugs. A deeper grasp of beta cell connectivity could eventually reshape how diabetes is treated.