Inhibition of Proliferation of Prostate Cancer Cell Line DU-145 in vitro and in vivo Using Salvia miltiorrhiza Bunge

Objective:To investigate the antiproliferative activity of Salvia miltiorrhiza Bunge.(SM)on the castration-resistant prostate cancer(CRPC)cell line DU-145 in vitro and in vivo.Methods:Prostate cancer cell line(DU-145)and normal prostate cell line(RWPE-1)were treated with SM at different concentrations(3.125,12.5,25 and 50μg/mL)to investigate the antiproliferative effects.DNA laddering analysis was performed to investigate the apoptosis of DU-145 cells.Molecular mechanism was investigated by Western blot analysis of p53,Bcl-2,prostate specific antigen(PSA),and androgen receptor(AR).Six-week-old male BALB/c nude mice were randomly divided into normal control group(n=101)and treated group(n=101)which administered 500 mg/kg SM for 2 weeks.Tumor volumes were measured.Results:Treatment with SM resulted in a dose-dependent decrease in cell number of DU-145 cells in comparison with RWPE-1.DNA laddering analysis indicated the apoptosis of DU-145 cells.Treatment with SM increased the expression of p53 and reduced the expression of Bcl-2 proteins.The levels of PSA were considerably reduced in SM-treated group compared to the controls,and a decrease in AR expression was observed when cells were treated with SM in the same pattern as a reduction in PSA.In the tumour xenograft study,SM given once a day for 2 weeks significantly inhibited tumour growth.Conclusion:SM might contribute to the anticancer actions such as induction of apoptosis and inhibition of proliferation of prostate cancer cells.

Suppression of Oxidative Stress of Modified Gongjin-Dan (WSY^1075) in Detrusor Underactivity Rat Model Bladder Outlet Induced by Obstruction

Objective： To investigate the anti-oxidative stress and preventive effect of modified Gongjin-dan （WSY-1075） in a detrusor underactivity rat model. Methods： Rats were randomly allocated to three groups： sham- operated （control）, bladder outlet obstruction-induced detrusor underactivity （BOO-DU）, and BOO-DU with WSY-1075 （WSY） groups. WSY-1075 was orally administrated to rats 200 mg daily for 2 weeks pdor to the operation and 4 weeks after the operation. Bladder outlet obstruction was surgically induced in rats by ligation around the urethra avoiding total obstruction. Cystometrography was conducted on rats in each group for examination of bladders. Results： Compared with the control group, bladder outlet obstruction led to a significant increase in oxidative stress with consequent changes to molecular composition, and decrease in maximal detrusor pressure （P〈0.05）. WSY-1075 treatment significantly suppressed oxidative stress and prevented degenerative and dysfunctional changes in bladder, as compared with BOO-DU group （P〈0.05）. Conclusion： WSY-1075 had beneficial effect on prevention of BOO-DU.