Abstract:
:Death-associated protein kinase (DAPk) family has emerged as a novel subfamily of pro-apoptotic serine/threonine kinase in the last 10 years. Although the functions of DAPk have been well documented, those of other family members remain uncertain. In this work, we characterized the expression pattern of human DAPk like kinase/Zipper interacting protein kinase (Dlk/ZIP kinase) in cancer specimens and cell lines. Dlk expression level was significantly down-regulated in cervical carcinoma cells compared to the surrounding non-tumorous tissues. Overexpression of Dlk led to cell morphological changes, suppressed colony formation and elevated cell apoptosis in cancer cell lines. Both the kinase activity and the cytoplasmic localization were required for its pro-apoptotic tendency. Mechanism exploration revealed that upon serum deprivation, Dlk overexpression could sensitize cells to apoptosis while overexpression of the kinase inactive mutant (Dlk-K42A) was able to rescue apoptotic cell death. Our data thus implicates that Dlk plays a positive role in modulating death-related signaling pathways. Reconstitution of Dlk expression might bring a potential therapeutic approach to cervical carcinoma treatments.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Wu Y,Yan Q,Zuo J,Saiyin H,Jiang W,Qiao S,Yu Ldoi
10.1016/j.bbrc.2010.01.054subject
Has Abstractpub_date
2010-02-19 00:00:00pages
510-5issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(10)00092-6journal_volume
392pub_type
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journal_title:Biochemical and biophysical research communications
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