Ganglioside GM3 is involved in neuronal cell death

Cited 62 time in scopus
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Title
Ganglioside GM3 is involved in neuronal cell death
Author(s)
Hosung Sohn; Yong Sam Kim; H T Kim; C H Kim; Eun Wie Cho; H Y Kang; Nam-Soon Kim; C H Kim; Seong Eon Ryu; J H Lee; Jeong Heon Ko
Bibliographic Citation
FASEB Journal, vol. 20, no. 8, pp. 1248-1250
Publication Year
2006
Abstract
Gangliosides abundant in the nervous system have been implicated in a broad range of biological functions, including the regulation of cell proliferation and death. Glutamate-induced cell death, which is accompanied by an accumulation of reactive oxygen species (ROS), is a major contributor to pathological cell death within the nervous system. However, the mechanism underlying this neuronal cell death has not been fully elucidated. In this study, we report that ganglioside GM3 is involved in neuronal cell death. GM3 was up-regulated in the mouse hippocampal cell line HT22 death caused by glutamate. Increment in GM3 levels by both the exogenous addition of GM3 and the overexpression of the GM3 synthase gene induced neuronal cell death. Overexpression of GM3 synthase by microinjecting mRNA into zebrafish embryos resulted in neuronal cell death in the central nervous system (CNS). Conversely, RNA interference-mediated silencing of GM3 synthase rescued glutamate-induced neuronal death, as evidenced by the inhibition of massive ROS production and intracellular calcium ion influx. 12-lipoxygenase (12-lipoxygenase) (12-LOX) was recruited to glycosphingolipid-enriched microdomains (GEM) in a GM3-dependent manner during oxidative glutamate toxicity. Our findings suggest that GM3 acts as not only a mediator of oxidative HT22 death by glutamate but also a modulator of in vivo neuronal cell death.
Keyword
12-lipoxygenaseGlycosphingolipid-enriched microdomainsGM3Neuronal cell deathROS
ISSN
0892-6638
Publisher
Wiley
DOI
http://dx.doi.org/10.1096/fj.05-4911fje
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Genome Editing Research Center > 1. Journal Articles
Division of Biomedical Research > Rare Disease Research Center > 1. Journal Articles
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