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CNS & Neurological Disorders - Drug Targets

Editor-in-Chief

ISSN (Print): 1871-5273
ISSN (Online): 1996-3181

Preconditioning by Oxygen-Glucose Deprivation Preserves Cell Proliferation and Reduces Cytotoxicity in Primary Astrocyte Cultures

Author(s): Maria Nikiforou, Evi Vlassaks, Eveline Strackx, Boris W. Kramer, Johan S.H. Vles and Antonio W.D. Gavilanes

Volume 14, Issue 1, 2015

Page: [61 - 67] Pages: 7

DOI: 10.2174/1871527314666150116120518

Price: $65

Abstract

Hypoxic-ischemic preconditioning (HIPC) has a neuroprotective effect against a subsequent, more severe perinatal hypoxic-ischemic episode. The protective processes of preconditioning (PC) in the immature brain remain undefined but are most likely related to the immune cells of the central nervous system. To determine the role of astrocytes in HIPC, we initially exposed primary rat astrocytes to oxygen-glucose deprivation (OGD) for 30 minutes as a PC stimulus. A subsequent more severe insult was induced 24 hours later by exposing the astrocytes to OGD for 3 hours. These experiments revealed that OGD for 3 hours induced increased cytotoxicity as measured by lactate dehydrogenase in primary astrocytes, which was diminished in astrocytes earlier subjected to PC. Moreover, decreased cell proliferation, as measured by Ki67, and lower cytokine expression (IL-1β, TNF-α, IL-6, IL-10) were observed in astrocytes subjected to OGD for 3 hours, while these levels remained unchanged in PC+OGD cells. Therefore, we speculate that PC by OGD may affect the survival, proliferation and function of primary cultured astrocytes which may partly explain the neuroprotective properties of HIPC seen in HI rat models.

Keywords: Astrocytes, cytokines, hypoxia-ischemia, hypoxic-ischemic preconditioning, oxygen-glucose deprivation, proliferation.


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