RWPE-1, LNCaP, and PC3 cells were grown in reduced serum conditions (2% FBS) in presence or absence of CXCL13 (100 ng/ml), isotype control antibody or anti-CXCR5 antibody (1 μg/ml), DOCK2siRNA or control siRNA (2 μM), and/or JNK inhibitor (10 μM). MTT assay was performed every 24 h for 3 days to assess cell proliferation. Error bars represent ± standard error of means of three independent experiments. *Significant (P < 0.05) changes relative to CXCL13-treated cells.