Table I.

Effect of 30-day treatment with nifedipine, verapamil and diltiazem on lipid peroxidation and antioxidant activities in sperm cells

	Control	Nifedipine	Verapamil	Diltiazem
MDA [nmol/ml]	7.8 ±0.39	10.3 ±0.20*	9.9 ±0.32*	10.7 ±0.28*
SOD [µmol/min]	3.8 ±0.18	2.7 ±0.29*	2.7 ±0.14*	3.1 ±0.22*
CAT [nmol/min]	11.8 ±1.02	7.8 ±0.58*	8.2 ±0.58*	7.2 ±0.37*
GSH [nmol/ml]	41.3 ±1.5	36.9 ±1.4	37.2 ±2.8	35.5 ±2.3

Values are expressed as mean ± SEM (n = 6);

^* p < 0.05, significantly different compared with control group; MDA – malondialdehyde, SOD – superoxide dismutase, CAT – catalase, GSH – reduced glutathione