| Literature DB >> 20206383 |
Arunasree M Kalle1, Sachchidanand Sachchidanand, Reddanna Pallu.
Abstract
Our previous studies have shown that overexpression of MDR1 and cyclooygenase-2 (COX-2) resulted in resistance development to imatinib in chronic myelogenous leukemia (CML) K562 (IR-K562) cells. In the present study, the regulatory mechanism of MDR1 induction by COX-2 was investigated. A gradual overexpression of MDR1 and COX-2 during the process of development was observed. Furthermore, down regulation of MDR1 upon COX-2 knockdown by siRNA showed a decrease in the PKC levels and activation of PKC by addition of PGE(2) to K562 cells, suggesting a role for PKC in the COX-2 mediated induction of MDR1. The present study demonstrates COX-2 induction by HDACs and MDR1 induction by COX-2 via PGE(2)-cAMP-PKC-mediated pathway. Copyright 2010 Elsevier Ltd. All rights reserved.Entities:
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Year: 2010 PMID: 20206383 DOI: 10.1016/j.leukres.2010.01.030
Source DB: PubMed Journal: Leuk Res ISSN: 0145-2126 Impact factor: 3.156