Role of Nonsteroidal Anti-inflammatory Drug-activated Gene-1 in Docetaxel-induced Cell Death of Human Colorectal Cancer Cells with Different p53 Status

Title
Role of Nonsteroidal Anti-inflammatory Drug-activated Gene-1 in Docetaxel-induced Cell Death of Human Colorectal Cancer Cells with Different p53 Status
Author(s)
김정애김일엽박수영강유라따파디네쉬최한곤[최한곤]
Keywords
BETA SUPERFAMILY MEMBER; CYCLOOXYGENASE-2 INHIBITORS; SULINDAC SULFIDE; PROSTATE-CANCER; EXPRESSION; NAG-1; APOPTOSIS; TUMORIGENESIS; COLON; PROLIFERATION
Issue Date
201102
Publisher
PHARMACEUTICAL SOC KOREA
Citation
ARCHIVES OF PHARMACAL RESEARCH, v.34, no.2, pp.323 - 330
Abstract
Nonsteroidal anti-inflammatory drug-activated gene-1 (NAG-1) expression is upregulated not only by NSAIDs such as sulindac sulfide, but also by several antitumorigenic dietary compounds, suggesting that NAG-1 is a specific target for the development of effective anticancer agents. Despite being a downstream target of p53, NAG-1 induction is both p53-dependent and p53-independent. It is not clear whether NAG-1 induction is the responsible factor in cancer cell apoptosis with mutated p53. In this study, we report that NAG-1 induction alone cannot determine apoptotic cell fate in colon cancer cells. Although docetaxel induced an increase in NAG-1 and apoptosis in both HCT-116 (wild-type p53) and HT-29 (mutant p53) colon cancer cells, NAG-1 knockdown with siRNA prevented docetaxel-induced cell death in only HCT-116 cells. Docetaxel decreased Bcl-2 in HCT-116 cells, which have functionally active p53, according to luciferase reporter gene analyses, and docetaxel-induced cell death and changes in Bcl-2 and NAG-1 expression were blocked by PFT-alpha, a p53 inhibitor. In HT-29 cells with functionally inactive p53, the docetaxel-induced Bcl-xL decrease, NAG-1 increase, and cell death were not blocked by PFT-alpha. On the other hand, sulindac sulfide at concentrations that significantly induced NAG-1 did not decrease cell viability comparable to docetaxel, and it did not affect the level of p53, Bax, Bcl-2, and Bcl-xL in either cell line. The present study demonstrates that p53-dependent NAG-1 induction is linked to cell death and that NAG-1 induction without accompanying alteration of antiapoptosis protein Bcl-2 family members may not lead to cancer cell death.
URI
http://hdl.handle.net/YU.REPOSITORY/25702http://dx.doi.org/10.1007/s12272-011-0219-8
ISSN
0253-6269
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약학대학 > 약학부 > Articles
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