Cadmium-Induced Adverse Alteration of Reproductive Parameters and Testicular Histoarchitecture of Wistar Rats: Protective Role of Palmitic Acid

Abstract

Cadmium (Cd) generates reactive oxygen species (ROS), leading to oxidative stress and adversely affecting reproductive organs and functions. Conversely, palmitic acid (PA) is a free radical scavenger naturally found in palm oil and consumed in diets. This study investigated the protective role of PA against cadmium-induced adverse alteration of male Wistar rats’ reproductive parameters. Twenty mature male Wistar rats were grouped into four (n=5/group): 0.2 mL of 10% Tween 80 (Control); 2 mg/kg bw-Cd; 2 mg/kg bw - Cd+200 mg/kg bw PA; and 200 mg/kg bw PA. PA was given via oral route daily for thirty days, while a single dose of Cd was intraperitoneally given. Serum testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH); testicular concentrations of magnesium, calcium, zinc, and cadmium; epididymal sperm parameters (morphology, motility, viability, and counts) were evaluated, and the testicular histoarchitecture was assessed using standard techniques. Data obtained were statistically analysed and compared using ANOVA at p < 0.05. In comparison to the control group, Cd exposure significantly decreased serum testosterone, FSH, and LH levels; testicular magnesium, calcium and zinc; sperm motility, viability and counts. In addition, cadmium exposure resulted in abnormal sperm morphology and distorted testicular histoarchitecture. The co-administration of Cd and PA in group 3 showed significant reversal of the adverse effect of Cd on reproductive hormones, electrolytes, sperm parameters and testicular histomorphology. Hence, palmitic acid exhibits a protective effect against cadmium-induced adverse alterations of reproductive parameters and testicular histoarchitecture in Wistar rats.