It has been understood that people with diabetes face an ominous prospect - a far greater risk of developing Alzheimer’s disease. Now researchers at The City College of New York (CCNY) have shed light on one reason why. Biology Professor Chris Li and her colleagues have discovered that a single gene forms a common link between the two diseases.They found that the gene, known to be present in many Alzheimer’s disease cases, affects the insulin pathway. Disruption of this pathway is a hallmark of diabetes.