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World J Diabetes. 2015 Mar 15;6(2):217-24. doi: 10.4239/wjd.v6.i2.217.

mTOR: Driving apoptosis and autophagy for neurocardiac complications of diabetes mellitus.

World journal of diabetes

Kenneth Maiese

Affiliations

  1. Kenneth Maiese, Cellular and Molecular Signaling, Newark, NJ 07101, United States.

PMID: 25789103 PMCID: PMC4360415 DOI: 10.4239/wjd.v6.i2.217

Abstract

The World Health Organization estimates that diabetes mellitus (DM) will become the seventh leading cause of death during the next two decades. DM affects approximately 350 million individuals worldwide and additional millions that remain undiagnosed are estimated to suffer from the complications of DM. Although the complications of DM can be seen throughout the body, the nervous, cardiac, and vascular systems can be significantly affected and lead to disorders that include cognitive loss, stroke, atherosclerosis, cardiac failure, and endothelial stem cell impairment. At the cellular level, oxidative stress is a significant determinant of cell fate during DM and leads to endoplasmic reticulum stress, mitochondrial dysfunction, apoptosis, and autophagy. Multiple strategies are being developed to combat the complications of DM, but it is the mechanistic target of rapamycin (mTOR) that is gaining interest in drug development circles especially for protective therapies that involve cytokines and growth factors such as erythropoietin. The pathways of mTOR linked to mTOR complex 1, mTOR complex 2, AMP activated protein kinase, and the hamartin (tuberous sclerosis 1)/tuberin (tuberous sclerosis 2) complex can ultimately influence neuronal, cardiac, and vascular cell survival during oxidant stress in DM through a fine interplay between apoptosis and autophagy. Further understanding of these mTOR regulated pathways should foster novel strategies for the complications of DM that impact millions of individuals with death and disability.

Keywords: Apoptosis; Autophagy; Cardiac disease; Diabetes mellitus; Erythropoietin; Mechanistic target of rapamycin; Metformin; Neurodegeneration; Oxidative stress; Vascular disease

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