Epigallocatechin-3-Gallate Enhances Antioxidant Activity and Improves Testicular and Epididymal Histology in Cadmium-Exposed Prepubertal Rats

The prepubertal period represents a critical stage of development, where the reproductive system is susceptible to toxicants such as cadmium (Cd). Cd induces oxidative stress, causes alterations in the antioxidant enzymes and testosterone concentration, and affects reproductive organs. (-)-Epigallocatechin-3-gallate (EGCG), a polyphenol with antioxidant properties, has been studied for its protective effects. We evaluated the effects of EGCG on antioxidant activity and improvement of testicular and epididymal histology in Cd-exposed prepubertal rats. Twenty-eight male Wistar rats, on postnatal day (PND) 21, were distributed into four groups: Ctrl (saline), Cd (1 mg/kg CdCl₂), EGCG (10 mg/kg), and Cd+EGCG (1 mg/kg CdCl₂ + 10 mg/kg EGCG). Treatments were administered intraperitoneally from PND 21 to 49. After euthanasia, blood, testes, and epididymides were collected for Cd content, testosterone concentration, antioxidant activity, and histological evaluation. Cd exposure increased blood Cd, reduced testosterone, impaired antioxidant activity, and caused epithelial disorganization in both organs. In contrast, co-administration of EGCG significantly lowered Cd accumulation, restored testosterone concentration and antioxidant enzymes, and preserved histological integrity of testes and epididymides. These findings demonstrate that EGCG exerts protective effects against Cd-induced reproductive damage during the prepubertal period, suggesting its potential therapeutic use to counteract Cd toxicity in reproductive development.