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Background: Previous studies showed that Heme Oxygenase-1 (HO-1) level was markedly reduced in Polycystic Ovary Syndrome (PCOS) which might highlight the role of HO-1system in the pathogenesis and treatment of PCOS. Aim of Study: The present study was done to study the effects of the induction of HO-1 system by hemin on Letrozole (LTZ)-induced PCOS in rats. Material and Methods: 40 female rats were divided into 4 equal groups; normal control (I), hemin (II), LTZ (III), hemin + LTZ treated (IV). Results: After three weeks, LTZ administration induced PCOS in female rats as evidenced by histological examination and biochemical analysis. It significantly increased testosterone level, LH and LH/FSH ratio compared with normal control group. LTZ significantly decreased plasma adiponectin level, ovarian Silent Information Regulator 1 level (SIRT1), Glutathione-S-Transeferase activity (GST), HO-1 mRNA expression and ovarian B-Cell Lymphoma 2 (BCL2) expression compared with normal control group. While, it increased ovarian hydrogen peroxide (H 2O 2) level, ovarian BCL2 associated X (Bax) expression and Bax/Bcl2 ratio compared with normal control group. Hemin administration antagonized all these effects. Conclusion: We could conclude that, hemin is a promising drug for treatment of PCOS through its antioxidant, antiinflammatory and anti-apoptotic effects which can rise up the possibility of involvement of HO system in pathogenesis of PCOS.

Hemin Ameliorated Letrozole-Induced Polycystic Ovary Syndrome: A Forward Step for Better Management