glucose toxicity
The harmful effects of chronic hyperglycemia on pancreatic beta cells and peripheral tissues.
Full Definition
Glucose toxicity describes the detrimental effects of sustained hyperglycemia on both pancreatic beta-cell function and insulin sensitivity in peripheral tissues, creating a vicious cycle that accelerates the progression of type 2 diabetes. Chronic exposure to elevated glucose levels impairs insulin secretion through mechanisms including oxidative stress, endoplasmic reticulum stress, and glucolipotoxicity, while simultaneously worsening insulin resistance in muscle, liver, and adipose tissue. This concept underlies the rationale for early aggressive glucose control to preserve beta-cell function and prevent irreversible metabolic deterioration.
Usage
Usage note: Often discussed in conjunction with lipotoxicity as glucolipotoxicity.
In Context
- "Glucose toxicity contributed to the rapid decline in beta-cell function observed in poorly controlled patients." — pathophysiology review
- "Early intervention aimed to prevent glucose toxicity and preserve endogenous insulin production." — treatment protocol