Comparison of VOCC's inhibitors effects on MAA-induced apoptosis of testicular cell population prepared from seminiferous tubules cultured for 12 h. Histograms represent apoptosis levels determined by TUNEL (p < 0.001). Data are expressed as mean +/- SEM of three independent experiments. 1. control; 2. MAA; 3 MAA plus ω-conotoxin; 4. MAA plus nifedipine; 5. MAA plus ω-agatoxin.