title: Overexpression of extracellular matrix metalloproteinase inducer in multidrug resistant cancer cells.
abstract: Multidrug resistant (MDR) cancer cells overexpressing P-glycoprotein (P-gp) display variations in invasive and metastatic behavior. We previously reported that these properties of MDR cancer cell lines overexpressing P-gp could be altered by chemotherapeutic drugs or MDR modulators (R. S. Kerbel et al., Cancer Surv., 7: 597-629, 1988). To attempt to clarify the mechanism(s) underlying these observations, we studied the expression of extracellular matrix metalloproteinase inducer (EMMPRIN), a glycoprotein enriched on the surface of tumor cells that can stimulate the production of matrix metalloproteinases (MMPs), in sensitive and MDR cancer cells. Using immunofluorescence staining and fluorescence-activated cell sorting analysis, we found that EMMPRIN expression was increased in MDR carcinoma cell lines, MCF-7/AdrR, KBV-1, and A2780Dx5, as compared to their parental counterparts. The MDR cell lines produced more matrix metalloproteinase-1 (MMP-1), matrix metalloproteinase-2 (MMP-2), and matrix metalloproteinase-9 (MMP-9), as determined by zymography, Western blot, and reverse transcription-PCR. Treatment of MDR cells with an anti-EMMPRIN antibody inhibited the activity of MMP-1, MMP-2, and MMP-9. In MDR cell line MCF-7/AdrR, an increased in vitro invasive ability was observed as compared with the sensitive line MCF-7, and EMMPRIN antibody could inhibit the in vitro invasion in drug-resistant cells. In addition, the expression and activity of MMP-1, MMP-2, and MMP-9 in MDR cells were decreased by treatment with U-0126, an inhibitor of mitogen-activated protein kinase/extracellular signal regulated kinase (MAPK/Erk). Our results suggest that during the development of MDR, the expression of EMMPRIN is responsible for the increased activity of MMP in MDR cell lines.
authors.affiliation: Department of Pharmacology, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey/Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.
authors.forename: Jin-Ming
authors.initials: JM
authors.lastname: Yang
authors.forename: Zude
authors.initials: Z
authors.lastname: Xu
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.forename: Hongguang
authors.initials: H
authors.lastname: Zhu
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Wu
authors.forename: William N
authors.initials: WN
authors.lastname: Hait
mesh_terms: D015703:Antigens, CD; D000951:Antigens, Neoplasm; D051926:Basigin; D002455:Cell Division; D045744:Cell Line, Tumor; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D006801:Humans; D020782:Matrix Metalloproteinases / Q000235:genetics / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000037:antagonists & inhibitors / Q000378:metabolism*; D009361:Neoplasm Invasiveness
chemical_list: D015703:Antigens, CD; D000951:Antigens, Neoplasm; C497886:BSG protein, human; D008562:Membrane Glycoproteins; D051926:Basigin; D020782:Matrix Metalloproteinases