ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of androgen receptor (AR) on IgG protein expression and the proliferation and migration of prostate cancer cells.</p><p><b>METHODS</b>Western blotting was used to detect the expression of AR protein and IgG in androgen-dependent prostate cancer LNCap cells and castration-resistant prostate cancer PC-3 cells. In AR-overexpressing cells (PC-3-AR cells) established by transfecting PC-3 with AR gene (pCDNA3.1) and LNCap cells with small interfering RNA-mediated AR silencing (LNCap-siAR cells) were analyzed for expressions of AR protein and IgG with Western blotting; the expression of IgG mRNA was detected by Q-PCR, and the cell proliferation and migration were assessed with MTT assay and wound healing assay, respectively.</p><p><b>RESULTS</b>Compared with PC-3 cells, LNCap cells expressed a higher level of AR protein and a lower level of IgG (P<0.05). PC-3-AR cells showed attenuated proliferation and migration with a lowered expression of IgG (P<0.01), while LNCap-siAR cells showed enhanced proliferation and migration with increased expression of IgG (P<0.01).</p><p><b>CONCLUSION</b>The expression of AR is inversely correlated with IgG and is associated with the proliferation and migration of prostate cancer cells in vitro.</p>