Pancreatic beta-cell metabolic and mitochondrial enzymes

Pancreatic beta-cell metabolic and mitochondrial enzymes encompass a diverse group of proteins that couple nutrient availability to insulin secretion, a process known as glucose-stimulated insulin secretion (GSIS) (PMID: 28867554). Key members include glucokinase, which acts as the primary glucose sensor by catalyzing the rate-limiting step of glycolysis, and mitochondrial enzymes such as pyruvate carboxylase and components of the respiratory chain (PMID: 17456334). These enzymes work in concert to elevate the intracellular ATP/ADP ratio, leading to the closure of ATP-sensitive potassium (K-ATP) channels and subsequent calcium influx that triggers insulin release. In type 2 diabetes, the activity and expression of these enzymes are often compromised, contributing to beta-cell dysfunction and chronic hyperglycemia (PMID: 30639515). Pharmacological agents like glucokinase activators (e.g., dorzagliatin) and mitochondrial modulators (e.g., imeglimin) target these pathways to enhance insulin secretion and restore metabolic homeostasis (PMID: 35752180).

Other names

Beta-cell metabolic enzymesMitochondrial enzymes of the pancreatic isletGlucose-sensing enzymesIslet metabolic machinery

Modulation of glucose sensing and mitochondrial oxidative metabolism to increase the intracellular ATP/ADP ratio, which triggers insulin secretion via the closure of ATP-sensitive potassium channels.