Journal
CURRENT DIABETES REVIEWS
Volume 17, Issue 5, Pages -Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1573399816666201103142102
Keywords
Insulin; mitochondrial dynamics; type 2 diabetes; metabolism; obesity; hyperglycemia; and hyperlipidemia
Categories
Funding
- Medicine School of Tecnologico de Monterrey
- Consejo Nacional de Ciencia y Tecnologia (CONACyT) [181460]
Ask authors/readers for more resources
The mechanisms of low insulin secretion and mitochondrial dysfunction in pancreatic beta-cells are related to the development of diabetes. Chronic exposure to high levels of glucose and lipids leads to glucolipotoxicity, which causes overstimulation of beta-cells and ultimately cell death. This review explores the impact of oxidative stress and mitochondrial dysfunction on beta-cells in type 2 diabetes development.
Glucolipotoxicity-induced oxidative stress and mitochondrial dysfunction of pancreatic beta-cells are some of the mechanisms that have been related to the low insulin secretion and cell death during diabetes development. In early or non-chronic stages, the pancreatic beta-cells respond to hyperglycemia or hyperlipidemia, stimulating insulin secretion. However, the chronic effect of both leads to glucolipotoxicity, which induces constant overstimulation of pancreatic beta-cells, a condition that leads to cell death by apoptosis. The mechanism described, at this moment, is the accelerated mitochondrial dysfunction triggered by the high production of reactive oxygen species (ROS) due to excess nutrients. At first, mitochondria respond to over-nutrition accelerating oxygen consumption and consequently increasing the ATP synthesis. A permanent increase of ATP/ADP ratio leads to a constant inhibition of K+ATP-channel and, therefore, a continuous insulin secretion accompanied by an increase in ROS. Finally, ROS accumulation compromises mitochondrial function due to the uncontrolled oxidation of proteins, lipids, and DNA generating functional alterations such as a drop of membrane potential, deregulation of mitochondrial dynamics, low rate of ATP synthesis and consequently the cell death. This review aims to describe the effect of glucolipotoxicity- induced oxidative stress and its relationship with mitochondrial dysfunction in beta-cell during type 2 diabetes development.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available