Inactivation of uPA and Its Receptor uPAR by 3,3′-Diindolylmethane (DIM) Leads to the Inhibition of Prostate Cancer Cell Growth and Migration

被引:38
作者
Ahmad, Aamir [1 ]
Kong, Dejuan [1 ]
Sarkar, Sanila H. [1 ]
Wang, Zhiwei [1 ]
Banerjee, Sanjeev [1 ]
Sarkar, Fazlul H. [1 ]
机构
[1] Wayne State Univ, Sch Med, Barbara Ann Karmanos Canc Ctr, Dept Pathol, Detroit, MI 48201 USA
关键词
3,3 '-DIINDOLYLMETHANE; PROSTATE CANCER; PC3; MIGRATION; VEGF; MMP-9; uPA; PLASMINOGEN-ACTIVATOR RECEPTOR; CDNA MICROARRAY ANALYSIS; NF-KAPPA-B; UROKINASE RECEPTOR; GENE-EXPRESSION; DOWN-REGULATION; TUMOR-GROWTH; CYCLE ARREST; IN-VIVO; APOPTOSIS;
D O I
10.1002/jcb.22152
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
3, 3'-Diindolylmethane (DIM) has been studied for its putative anti-cancer properties, especially against prostate cancer; however, its exact mechanism of action remains unclear. We recently provided preliminary data suggesting down-regulation of uPA during B-DIM (a clinically active DIM)-induced inhibition of invasion and angiogenesis in prostate cancer cells. Since the expression and activation of uPA plays important role in tumorigenicity, and high endogenous levels of uPA and uPAR are found in advanced metastatic cancers, we investigated their role in B-DIM-mediated inhibition of prostate cancer cell growth and motility. Using PC3 cells, we found that B-DIM treatment as well as the silencing of uPA and uPAR by siRNAs led to the inhibition of cell growth and motility. Conversely, over-expression of uPA/uPAR in LNCaP and C4-2B cells resulted in increased cell growth and motility, which was effectively inhibited by B-DIM. Moreover, we found that uPA as well as uPAR induced the production of VEGF and MMP-9, and that the down-regulation of uPA/uPAR by siRNAs or B-DIM treatment resulted in the inhibition of VEGF and MMP-9 secretion which could be responsible for the observed inhibition of cell migration. Interestingly, silencing of uPA/uPAR led to decreased sensitivity to B-DIM indicating important role of uPA/uPAR in B-DIM-mediated regulation of prostate cancer cell growth and migration. Our data suggest that chemopreventive and/or therapeutic activity of B-DIM is in part due to down-regulation of uPA-uPAR leading to reduced production of VEGF/MMP-9 which ultimately leads to the inhibition of cell growth and migration of aggressive prostate cancer cells. J. Cell. Biochem. 107: 516-527, 2009. (C) 2009 Wiley-Liss, Inc.
引用
收藏
页码:516 / 527
页数:12
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