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Nordihydroguaiaretic acid induces astroglial death via glutathione depletion

Title
Nordihydroguaiaretic acid induces astroglial death via glutathione depletion
Authors
Im J.-Y.Han P.-L.
Ewha Authors
한평림
SCOPUS Author ID
한평림scopus
Issue Date
2007
Journal Title
Journal of Neuroscience Research
ISSN
0360-4012JCR Link
Citation
vol. 85, no. 14, pp. 3127 - 3134
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Nordihydroguaiaretic acid (NDGA) is known to cause cell death in certain cell types that is independent of its activity as a lipoxygenase inhibitor; however, the underlying mechanisms are not fully understood. In the present study, we examined the cellular responses of cultured primary astroglia to NDGA treatment. Continuous treatment of primary astroglia with 30 μM NDGA caused >85% cell death within 24 hr. Cotreatment with the lipoxygenase products 5-HETE, 12-HETE, and 15-HETE did not override the cytotoxic effects of NDGA. In assays employing the mitochondrial membrane potential-sensitive dye JC-1, NDGA was found to induce a rapid and almost complete loss of mitochondrial membrane potential. However, the mitochondrial permeability transition pore inhibitors cyclosporin A and bongkrekic acid did not block NDGA-induced astroglial death. We found that treatment with N-acetyl cysteine (NAC), glutathione (GSH), and GSH ethyl ester (GSH-EE) did inhibit NDGA-induced astroglial death. Consistently, NDGA-induced astroglial death proceeded in parallel with intracellular GSH depletion. Pretreatment with GSH-EE and NAC did not block NDGA-induced mitochondrial membrane potential loss, and there was no evidence that reactive oxygen species (ROS) production was involved in NDGA-induced astroglial death. Together, these results suggest that NDGA-induced astroglial death occurs via a mechanism that involves GSH depletion independent of lipoxygenase activity inhibition and ROS stress. © 2007 Wiley-Liss, Inc.
DOI
10.1002/jnr.21431
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일반대학원 > 뇌·인지과학과 > Journal papers
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