Tag: Insulin resistance

Hyperinsulinemia is a condition characterized by elevated circulating insulin levels. It commonly develops as a compensatory response to insulin resistance, allowing the pancreas to produce more insulin to maintain glucose homeostasis. Understanding hyperinsulinemia provides insight into insulin signaling, glucose and lipid metabolism, obesity, metabolic syndrome, prediabetes, and type 2 diabetes.

The insulin receptor is a cell-surface receptor tyrosine kinase that plays a central role in insulin signaling and metabolic regulation. When insulin binds to the receptor, it activates receptor autophosphorylation and downstream signaling through IRS proteins, PI3K-Akt, MAP kinase, GLUT4, and other pathways. These signals regulate glucose uptake, glycogen synthesis, lipid metabolism, protein metabolism, cell growth, and energy balance. Understanding the insulin receptor provides a foundation for understanding insulin sensitivity, insulin resistance, hyperinsulinemia, and metabolic disease.