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Current Topics in Pharmacology   Volumes    Volume 5 
Endothelin ETB receptors in glial cells: a new target for neurotrophic drugs
Yutaka Koyama, Akemichi Baba
Pages: 119 - 127
Number of pages: 9
Current Topics in Pharmacology
Volume 5 

Copyright © 2000 Research Trends. All rights reserved

A phenotypic alteration of astrocytes, “astrocytic activation”, is a common phenomenon observed on brain pathologies. Activated astrocytes reveal important roles in tissue repair processes of damaged nervous system. Modulation of the astrocytic functions by synthetic drugs is expected to affect improvement of brain functions and thus, astrocytic receptors have caught much attention as a new target of neurotrophic drugs. Astrocytes express both endothelin (ET) and its receptors. Recent studies on experimental brain injury models showed that astrocytic ET receptors, especially ETB receptors, are involved in the activation of astrocytes on brain pathologies. In cultured astrocytes, ETs reproduce the functional alterations characterizing activated astrocytes on brain pathologies; increases in proliferation, morphological changes and stimulation of several gene transcription. These studies suggest that astrocytic ETB receptors can be one of targets for the drugs ameliorating neuronal damages on brain insults through modulating astrocytic function.
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