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Pkc delta DMQD

Kun Jiang, André H Apostolatos, Tomar Ghansah, James E Watson, Timothy Vickers, Denise R Cooper, P K Epling-Burnette, Niketa A Patel
Protein kinase C (PKC) delta plays an important role in cellular proliferation and apoptosis where it is involved in the caspase-3 mediated apoptotic pathway. Cleavage of PKCdeltaI by caspase-3 releases a catalytically active C-terminal fragment that is sufficient to induce apoptosis. In this paper, we identified a novel human PKCdelta isozyme, PKCdeltaVIII (Genbank accession number DQ516383) in human teratocarcinoma (NT2) cells that differentiate into hNT neurons upon retinoic acid (RA) treatment. Expression of PKCdeltaVIII was confirmed by real-time RT-PCR analysis, and we observed that after an initial peak at 24 h following RA treatment, its expression gradually declined with prolonged RA treatment...
January 15, 2008: Biochemistry
Shalini D Persaud, Van Hoang, Jie Huang, Alakananda Basu
Proteolytic activation of protein kinase C delta (PKCdelta) has been associated with apoptosis induced by the DNA damaging agent cisplatin. In cells undergoing apoptosis, caspase-3 cleaves PKCdelta at the site DMQD downward arrowN to generate a 40-kDa catalytic fragment. We have previously shown that the PKC signal transduction pathway regulates sensitivity of human small cell lung cancer H69 cells to cisplatin. In the present study, we have investigated if proteolytic activation of PKCdelta is essential for cisplatin-induced apoptosis in H69 cells...
July 2005: International Journal of Oncology
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