Regulation of growth, PSA/PAP and androgen receptor expression by 1 alpha,25-dihydroxyvitamin D3 in the androgen-dependent LNCaP cells.

Abstract:

:The involvement of vitamin D in prostate carcinogenesis was investigated using the human prostatic LNCaP cells. Incubation of the LNCaP with 100 nM 1 alpha,25-dihydroxyvitamin D3 for 2 days resulted in a 30-40% suppression of cell growth, which was accompanied by a greater than 70% down-regulated expression of the proliferating cell nuclear antigen (PCNA). The intracellular and secreted forms of PSA showed a 2-fold increase following a 48 h culture in the presence of vitamin D3. The vitamin D3-elicited PSA increases were preceded by an induction of androgen receptor (AR) expression, as measured by Western blot analysis and by binding assays using [3H]R1881 as the ligand. These results are consistent with the hypothesis that the growth inhibitory effects of vitamin D3 is partially mediated through its ability to modulate PCNA expression. Moreover, vitamin D3 may effect increases in PSA expression indirectly by up-regulating androgen receptors.

authors

Hsieh TY,Ng CY,Mallouh C,Tazaki H,Wu JM

doi

10.1006/bbrc.1996.0859

subject

Has Abstract

pub_date

1996-06-05 00:00:00

pages

141-6

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X96908591

journal_volume

223

pub_type

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