Brain insulin resistance contributes to cognitive decline in Alzheimer's disease

Brain insulin resistance contributes to cognitive decline in Alzheimer's disease: Insulin resistance in the brain precedes and contributes to cognitive decline above and beyond other known causes of Alzheimer's disease, according to a new study by researchers from the Perelman School of Medicine at the University of Pennsylvania. Insulin is an important hormone in many bodily functions, including the health of brain cells. The team identified extensive abnormalities in the activity of two major signaling pathways for insulin and insulin-like growth factor in non-diabetic people with Alzheimer's disease. These pathways could be targeted with new or existing medicines to potentially help resensitize the brain to insulin and possibly slow down or even improve cognitive decline.