NDLI: A unique glucose-dependent apoptotic pathway induced by c-Myc

Content Provider	PubMed Central
Author	Shim, Hyunsuk Chun, Yoon S. Lewis, Brian C. Dang, Chi V.
Copyright Year	1998
Abstract	The lactate dehydrogenase A (LDH-A) gene, whose product participates in normal anaerobic glycolysis and is frequently increased in human cancers, has been identified as a c-Myc-responsive gene. It was of interest, therefore, to compare the effect of glucose deprivation in c-Myc-transformed and nontransformed cells. We observed that glucose deprivation or treatment with the glucose antimetabolite 2-deoxyglucose caused nontransformed cells to arrest in the G0/G1 phase of the cell cycle. In contrast, c-Myc-transformed fibroblasts, lymphoblastoid, or lung carcinoma cells underwent extensive apoptosis. Ectopic expression of LDH-A alone in Rat1a fibroblasts was sufficient to induce apoptosis with glucose deprivation but not with serum withdrawal, suggesting that LDH-A mediates the unique apoptotic effect of c-Myc when glycolysis is blocked. The apoptosis caused by glucose deprivation was blocked by Bcl-2 expression but appeared to be independent of wild-type p53 activity. These studies provide insights on the coupling of glucose metabolism and the cell cycle in c-Myc-transformed cells and may in the future be exploited for cancer therapeutics.
Starting Page	1511
File Format	PDF
ISSN	10916490
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	4
Volume Number	95
Language	English
Publisher	The National Academy of Sciences
Publisher Date	1998-02-17
Access Restriction	Open
Rights Holder	The National Academy of Sciences
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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