In vitro effects of compound Chinese herbal medicine Zilongjin on prostate cancer cell lines / 中华泌尿外科杂志

ABSTRACT

Objective To investigate the in vitro effects of compound Chinese herbal medicine Zilongjin on prostate cancer cell lines. Methods MTT assay,flow cytometry, colony on soft agar,and fluorescence microscopy were used to observe the effects of Zilongjin on anti proliferation,inhibition of clonal growth,cell cycle arrest and apoptosis induction.RT PCR method was used to study the regulative effect of Zilongjin on prostate marker genes PSA,AR,apoptosis related genes Bcl 2,Bax and tumor suppressing gene p16. Results Zilongjin caused notable anti proliferative effect,and induced G 0/G 1 phase arrest dose dependently on LNCaP,DU 145 and PC 3 cell lines.Inhibition of cell growth by 50% (IC 50 ) was observed with Zilongjin at concentrations of 0.79,0.42 and 0.52 mg/ml,respectively.Apoptosis induction was seen in LNCaP and DU 145 cell lines.Zilongjin also caused inhibition of clonal growth of DU 145 cell line.In addition,Zilongjin down regulated the expression of PSA,AR and Bcl 2 genes in LNCaP cell line;and down regulated Bcl 2,up regulated Bax and p16 genes expression in DU 145 cell line. Conclusions It is demonstrated that Zilongjin has antitumor action through anti proliferation,inhibition of clonal growth,G 0/G 1 phase arrest,apoptosis induction and regulating the expression of PSA,AR,Bcl 2,Bax and p16 genes.