[In vitro effect of zilongjin on prostate cancer cell line LNCaP].
OBJECTIVE
To investigate the effect of Zilongjin (ZLJ) on human androgen-dependent type of prostate cancer cell line LNCaP.


METHODS
MTT assay, flow cytometry and fluorescence microscopy were used to observe the effect of ZLJ in anti-proliferation, cell cycle arresting and apoptosis induction. RT-PCR was used to examine the effect of ZLJ on expressions of prostate marker gene (PSA), androgen receptor (AR), apoptosis related genes (bcl-2 and bax), and Western blot assay was used to detect the effect on protein expression of bcl-2 and bax.


RESULTS
ZLJ could cause apparent inhibition on proliferation, induce G0/G1 phase arresting and apoptosis in time- and dose-dependent manner on LNCaP cells. The concentration for inhibiting cell growth by 50% (IC50) in 72 hrs was 0.79 mg/ml. ZLJ could down-regulate the expression of PSA, AR, bcl-2 genes and lower bcl-2 protein expression, but showed ineffective on bax protein expression.


CONCLUSIONS
ZLJ displays its anti-tumor effects by way of inhibiting the cell proliferation, arresting the G0/G1 phase, inducing apoptosis, down-regulating PSA, AR, bcl-2 gene expression and lowering bcl-2 protein expressions.
Li
Xue-song
XS
[Institute of Urology, First Hospital, Peking University, Beijing 100034] pineneedle@sina.com
Liang
Yun-yan
YY
Wang
Dai-shu
DS
Xie
Xianhe
X
Shi
Changjin
C
Chen
Jie
J
Sun
Guofeng
G
Zhou
Liqun
L
Xue
Zhaoying
Z
Na
Yangun
Y
Guo
Yinglu
Y
D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D006801:Humans; D008297:Male; D009376:Neoplasms, Hormone-Dependent / Q000378:metabolism / Q000473:pathology*; D017430:Prostate-Specific Antigen / Q000096:biosynthesis / Q000235:genetics; D011471:Prostatic Neoplasms / Q000378:metabolism / Q000473:pathology*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis / Q000235:genetics; D011944:Receptors, Androgen / Q000096:biosynthesis / Q000235:genetics
D000972:Antineoplastic Agents, Phytogenic; D004365:Drugs, Chinese Herbal; D019253:Proto-Oncogene Proteins c-bcl-2; D011944:Receptors, Androgen; D017430:Prostate-Specific Antigen