PMID- 19885629 OWN - NLM STAT- MEDLINE DCOM- 20100204 LR - 20151119 IS - 1791-244X (Electronic) IS - 1107-3756 (Linking) VI - 24 IP - 6 DP - 2009 Dec TI - Effects of protein kinase Cdelta and phospholipase C-gamma1 on monocyte chemoattractant protein-1 expression in taxol-induced breast cancer cell death. PG - 853-8 AB - Monocyte chemoattractant protein-1 (MCP-1) is a CC chemokine that plays an important role in immune cell migration. It has been reported that chemokines, including MCP-1, are involved in angiogenesis and metastasis. However, the exact role of chemokines in cancer development is still obscure. We investigated the involvement of MCP-1 in taxol-induced breast cancer cell death. The anti-cancer drug taxol induced MCF-7 breast cancer cell death. Treatment with taxol increased the mRNA expression level of MCP-1 in a dose- and time-dependent manner. Up-regulation of MCP-1 by taxol was augmented in cells treated with rottlerin, a specific inhibitor of protein kinase Cdelta (PKCdelta). In addition, taxol-induced MCP-1 expression was reduced by the ectopic expression of PKCdelta in a dose-dependent manner, indicating that PKCdelta plays a negative role in taxol-induced MCP-1 expression in MCF-7 cells. On the other hand, taxol-induced up-regulation of MCP-1 was reduced in cells treated with U73122, an inhibitor of phospholipase C (PLC), and ectopic expression of PLC-gamma1 increased the expression of MCP-1 in taxol-treated MCF-7 cells, indicating that PLC-gamma1 functions as a positive regulator in taxol-induced MCP-1 expression. These results indicate that MCP-1 is involved in taxol-induced breast cancer cell death and we propose that taxol induces up-regulation of MCP-1 by affecting both positive and negative regulatory signaling pathways. FAU - Kim, Yoon Suk AU - Kim YS AD - Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University, Wonju 220-710, Korea. FAU - An, Hyoung Tae AU - An HT FAU - Kim, Jeonghan AU - Kim J FAU - Ko, Jesang AU - Ko J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Greece TA - Int J Mol Med JT - International journal of molecular medicine JID - 9810955 RN - 0 (Chemokine CCL2) RN - 0 (Chemokines) RN - 0 (RNA, Messenger) RN - EC 2.7.11.13 (Protein Kinase C-delta) RN - EC 3.1.4.3 (Phospholipase C gamma) RN - P88XT4IS4D (Paclitaxel) SB - IM MH - Breast Neoplasms/drug therapy/enzymology/*metabolism/pathology MH - Cell Death/drug effects MH - Cell Line, Tumor MH - Chemokine CCL2/*biosynthesis/genetics MH - Chemokines/genetics/metabolism MH - Dose-Response Relationship, Drug MH - Female MH - Humans MH - Paclitaxel/*pharmacology MH - Phospholipase C gamma/*metabolism MH - Protein Kinase C-delta/*metabolism MH - RNA, Messenger/biosynthesis/genetics MH - Up-Regulation/drug effects EDAT- 2009/11/04 06:00 MHDA- 2010/02/05 06:00 CRDT- 2009/11/04 06:00 PHST- 2009/11/04 06:00 [entrez] PHST- 2009/11/04 06:00 [pubmed] PHST- 2010/02/05 06:00 [medline] PST - ppublish SO - Int J Mol Med. 2009 Dec;24(6):853-8.