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Current Topics in Neurochemistry   Volumes    Volume 3 
Abstract
Metabotropic glutamate receptors modulate novel signal transduction pathways to foster cytoprotection
Kenneth Maiese, Shi-Hua Lin, Zhao Zhong Chong
Pages: 97 - 105
Number of pages: 9
Current Topics in Neurochemistry
Volume 3 

Copyright © 2002 Research Trends. All rights reserved

ABSTRACT

During both cell differentiation and development, the metabotropic glutamate receptor (mGluR) system plays an important role in securing successful maturation of an organism. Yet, the mGluR system may hold a more crucial role that involves the prevention and reversal of cellular injury during acute and chronic neurodegenerative disorders. As G-protein related receptors, the mGluR system employs a host of signal transduction systems to regulate cell survival and injury. In most circumstances, it is activation of specific mGluR subtypes that prevent the induction of programmed cell death (PCD) along two distinct pathways that involve the degradation of genomic DNA and the exposure of membrane phosphatidylserine (PS) residues. The mGluR system modulates a selective range of cellular pathways that include protein kinases, intracellular calcium, endonucleases, and cysteine proteases, but excludes more “up-stream” cellular mechanisms such as mitogen-activated protein kinases. Cytoprotection through the mGluR system is directly clinically relevant, since immediate and delayed injury paradigms demonstrate the ability of this system to reverse the progression of PCD in both neuronal and vascular cell populations.

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