Increased fructolysis of kallikrein-stimulated human spermatozoa.

Significant stimulation of human sperm motility by kallikrein, a kinin-releasing proteinase, was observed to occur in semen specimens with reduced sperm motility during an incubation period of 24 hours at 22 degrees C. Parallel to an increase of the total sperm motility an increase of the fructose utilization was measured after addition of a single dose of kallikrein (1 KU/ml) within the same incubation period.