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EIF2alpha and caspase-12 activation are involved in oxygen-glucose-serum deprivation/restoration-induced apoptosis of spinal cord astrocytes.

Authors: Zhang, Ailiang  Zhang, Jie  Sun, Peng  Yao, Changjiang  Su, Changhui  Sui, Tao  Huang, Hua  Cao, Xiaojian  Ge, Yingbin 
Citation: Zhang A, etal., Neurosci Lett. 2010 Jun 30;478(1):32-6. doi: 10.1016/j.neulet.2010.04.062. Epub 2010 May 2.
Pubmed: (View Article at PubMed) PMID:20444431
DOI: Full-text: DOI:10.1016/j.neulet.2010.04.062

Astrocytes play an important role in protecting neurons during ischemia and reperfusion in the central nervous system. Although many studies have shown that oxygen-glucose deprivation (OGD) can induce astrocyte apoptosis, the role of PERK/eIF2 alpha/ATF4 integrated stress response (ISR) in astrocyte apoptosis mediated by oxygen-glucose-serum deprivation (OGSD)/restoration remains uncertain. Astrocytes were subjected to a combination of oxygen, glucose, and serum deprivation for 8h followed by restoration. Hoechst 33342 staining was performed to quantify apoptotic astrocytes and cell viability was assessed with Cell Counting Kit-8 (CCK8). Immunocytochemical analysis and Western blotting for some related molecules, including pancreatic ER stress kinase (PERK), p-PERK, eukaryotic initiation factor 2 alpha (eIF2 alpha), p-eIF2 alpha, activating transcription factor 4 (ATF4), caspase-12, were examined. Caspase activation and apoptosis were detected in neonatal rat astrocytes from spinal cord subjected to OGSD/restoration. We also observed an increase in cytoplasmic staining of p-eIF2 alpha in astrocytes (8h OGSD/15 min restoration) compared with that of non-treated cells. In addition, we found the sequential activation of PERK, eIF2 alpha, and ATF4 during OGSD/restoration by Western blotting. These results indicate that both the PERK/eIF2 alpha/ATF4 ISR and activation of caspase-12 may be involved in apoptosis of spinal cord astrocytes induced by OGSD/restoration.

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CRRD Object Information
CRRD ID: 13464322
Created: 2018-01-03
Species: All species
Last Modified: 2018-01-03
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.