Provocation testing of human sperm motility using energy substrates and activators of the cyclic nucleotide system: II. Studies on sperm from asthenozoospermic subjects.

To find differences in effect on sperm motility of agents that increase intracellular cAMP: manganese ion, methyl-isobutyl-xanthine (MIX), 2-deoxyadenosine, glucose, and Mn-MIX and Mn-glucose. Nine men with asthenozoospermia vs. fertile donors. Sperm was washed in Hepes-buffered saline, motility tested by laser-Doppler technique. Best activation was obtained with Mn and 2-deoxyadenosine; generally poor response to MIX or glucose. Usually, poor endogenous stimulation of adenylyl cyclase, and probably not limited energy supply, is the cause of impaired motility.