Abstract:
:Recent studies have shown DAPk as a molecular modulator induced by the second messenger, responsible for controlling cell destiny decisions, but the detailed mechanism mediating the role of DAPk1 during cell death is still not fully understood. In this present report, we attempted to characterize the effects of TNF-α and INF-γ on DAPk1 in human ovarian carcinoma cell lines, OVCAR-3. Both TNF-α and INF-γ significantly induce DAPk1 levels in a time-dependent manner. At the same time, they both arrested cell cycle progression in the G(0)-G(1) and G2/M phase, down-regulated cyclin D1, CDK4 and NF-κB expression, while also up-regulating p27 and p16 expression. Subsequently, the efficacy of the combined treatment with DAPk1 was investigated. In the presence of DAPk1, TNF-α or INF-γ-induced apoptosis was additively increased, while TNF-α or INF-γ-induced NF-κB activity was inhibited. Conversely, TNF-α or INF-γ-dependent NF-κB activity was further enhanced by the inhibition of DAPk1 with its specific siRNA. The activity of NF-κB was dependent on the level of DAPk1, indicating the requirement of DAPk1 for the activation of NF-κB. Low levels of DAPk1 expression were frequently observed in different human patient's tissue and cancer cell lines compared to normal samples. In addition, over-expression of DAPk1 from either TNF-α or INF-γ-treatment cells suppressed the anti-apoptosis protein XIAP as well as COX-2 and ICAM-1, more than control. Taken together, our data findings suggest that DAPk1 can mediate the pro-apoptotic activity of TNF-α and INF-γ via the NF-κB signaling pathways.
journal_name
Cell Signaljournal_title
Cellular signallingauthors
Yoo HJ,Byun HJ,Kim BR,Lee KH,Park SY,Rho SBdoi
10.1016/j.cellsig.2012.03.010subject
Has Abstractpub_date
2012-07-01 00:00:00pages
1471-7issue
7eissn
0898-6568issn
1873-3913pii
S0898-6568(12)00087-3journal_volume
24pub_type
杂志文章abstract::HOX family transcription factors belong to a highly conserved subgroup of the homeobox superfamily that determines cellular fates in embryonic morphogenesis and the maintenance of adult tissue architecture. HOX family transcription factors play key roles in numerous cellular processes including cell growth, differenti...
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pub_type: 杂志文章
doi:10.1016/j.cellsig.2005.07.006
更新日期:2006-06-01 00:00:00
abstract::Activation of the caspase proteases by c-Jun N-terminal kinase 1 (JNK1) has been proposed as a mechanism of apoptotic cell death. Here we report that insulin activates caspase-3 by a pathway requiring phosphatidylinositol 3'-kinase (PI3-kinase). JNK1 assays demonstrated that insulin treatment of myeloma cells induced ...
journal_title:Cellular signalling
pub_type: 杂志文章
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journal_title:Cellular signalling
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pub_type: 杂志文章,评审
doi:10.1016/s0898-6568(97)00194-0
更新日期:1998-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.cellsig.2009.12.003
更新日期:2010-04-01 00:00:00
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journal_title:Cellular signalling
pub_type: 杂志文章
doi:10.1016/j.cellsig.2011.12.023
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journal_title:Cellular signalling
pub_type: 杂志文章
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更新日期:2007-09-01 00:00:00
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更新日期:2003-11-01 00:00:00
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