[The influence of neuroendocrine differentiation on the growth and androgen receptor expression of prostate carcinoma cells].
OBJECTIVE
To study the paracrine effect of the neuroendocrine differentiation cells and its influence on androgen receptor expression of prostate carcinoma cells.


METHODS
Established an in vitro induced model of neuroendocrine differentiation of prostate carcinoma (LNCaP(NE), PC-3M(NE)), and investigate the proliferation effect of neuroendocrine phenotype cells (LNCaP(NE), PC-3M(NE)) on other non-neuroendocrine phenotype cells (LNCaP, PC-3M) by feeding non-neuroendocrine phenotype cells with the medium pre-incubated with induced neuroendocrine phenotype cells. It was also tested the regulation of androgen receptor mRNA and androgen receptor protein expression of LNCaP(NE) cells on LNCaP cells by reverse transcriptase polymerase chain reaction and Western Blot in the presence or absence of androgens.


RESULTS
The medium pre-incubated with PC-3M(NE) cells could promote the proliferation of PC-3M cells. The medium pre-incubated with LNCaP(NE) cells could promote the proliferation of LNCaP cells, and reduce the expression of androgen receptor in the latter in the absence of androgens, but the negative results were observed in the presence of androgens.


CONCLUSIONS
The neuroendocrine phenotype cells of prostate cancer can reduce the expression of androgen receptor in prostate cancer cells and promote them to proliferate by means of paracrine in the blockade of androgens.
Song
Yi
Y
Institute of Urology, the Department of Urology, First Hospital of Peking University, Beijing 100034, China. ddsongyi@263.net
Wu
Guan
G
Xin
Dian-qi
DQ
Na
Yan-qun
YQ
D000728:Androgens / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D006801:Humans; D008297:Male; D009376:Neoplasms, Hormone-Dependent / Q000378:metabolism / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000378:metabolism / Q000473:pathology*; D011944:Receptors, Androgen / Q000378:metabolism*
D000728:Androgens; D011944:Receptors, Androgen