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Molecular Mechanisms of GD3-Induced Apoptosis in U-1242 MG Glioma Cells

Content Provider	Springer Nature Link
Author	Omran, O. M. Saqr, H. E. Yates, Allan J.
Copyright Year	2006
Abstract	An increasing amount of evidence indicates that the disialoganglioside GD3 is involved in apoptosis in many cell lines. Our previous studies demonstrated that endogenous GD3 expression induced apoptosis in U-1242 MG glioma cells transfected with the GD3 synthase gene (U1242MG-GD3 cells). In this paper, we present further investigations on the molecular mechanisms of GD3-induced apoptosis in this cell line. We found that endogenously synthesized GD3 localizes to the caveolae of this cell line, where it promotes the localization of death receptor 5 (DR5), tumor necrosis factor receptor-1 (TNF-R1), and Fas (Apo-1) to the caveolae. In addition, caspase-8 was translocated to the caveolar fraction and cleaved; the cleaved proteins were then re-located into the high density fractions. However, GD3 had no effect on the distribution of the adapter protein Fas-associated death domain (FADD). We conclude that GD3 functions as a regulatory molecule early in the extrinsic apoptosis pathway.
Starting Page	1171
Ending Page	1180
Page Count	10
File Format	PDF
ISSN	03643190
Journal	Neurochemical Research
Volume Number	31
Issue Number	10
e-ISSN	15736903
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-10-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ganglioside GD3 Glioma Apoptosis DR5 Caspase-8 TNF-R1 Neurology Biochemistry Neurosciences
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Cellular and Molecular Neuroscience

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