The effects of the protein kinase C inhibitors Gö 6976 and bisindolylmaleimide, and the L-type calcium channel blocker nifedipine upon phenylephrine-stimulated contractility in human cultrued prostatic stromal cells. Cells were incubated with either Gö 6976 (1 μM), bisindolymaleimide (1 μM), nifedipine (NIF, 10 μM) or vehicle control prior to the addition of phenylephrine (10 μM). In all cases n=6. †Significant when compared to vehicle control P<0.05; Dunnett's test. *Significant when compared to PE (10 μM), P<0.05; Bonferroni's test.