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The present study aims to assess the toxic effect of latex and ethanolic leaf extract of  Calotropis procera  ( C. procera ), in comparison to abamectin, on serum biomarkers of function and histological integrity of heart and testis in male albino rats. To achieve this aim, the albino rats were separately administered 1/20 and 1/10 of LD 50  of  C. procera  latex, ethanolic  C. procera  leaf extract and abamectin respectively by oral gavage for 4 and 8 weeks.  C. procera  latex and leaf extract as well as abamectin markedly elevated the activities of serum CK-MB, AST and LDH at the two tested periods in a dose dependent manner. Lipid peroxidation was significantly increased while GSH level and GPx, GST and SOD activities were significantly depleted in heart and testis of all treated rats. All treatments also induced a marked increase in serum TNF-α and decrease in serum IL-4, testosterone, FSH and LH levels in a dose dependent manner. The latex seemed to be more effective in deteriorating the testicular function and sex hormones’ levels while the ethanolic leaf extract produced more deleterious effects on oxidative stress and antioxidant defense system in both heart and testis. The normal histological architecture and integrity of the heart and testis were perturbed after treatments and the severity of lesions, which include odema, inflammatory cell infiltration, necrosis and degeneration, is dose and time dependent. In conclusion, the findings of this study indicated that  C. procera  latex and ethanolic extract of leaves could induce marked toxicity in heart and testis and these toxic effects may be more or less similar to those of abamectin. The cardiotoxicity and testicular toxicity may be mediated via stimulation of inflammation, increased oxidative stress and suppression of antioxidant defense system.

Cardiac and testicular toxicity effects of the latex and ethanolic leaf extract of Calotropis procera on male albino rats in comparison to abamectin