Effect of Abelmoschus esculentus powder on ovarian histology, expression of apoptotic genes and oxidative stress in diabetic rats fed with high fat diet

Abstract

Okra (A.esculentus) is an antidiabetic plant that it's beneficial effects on ovarian dysfunction in diabetes condition has not been clarified. The present study was designed to examine the effect of Okra powder on serum oxidant/antioxidant status, ovarian structure and expression of apoptotic/antiapoptotic related genes in ovary of experimentally induced high fat diet diabetic rats. Diabetes was induced by 5 weeks feeding of Wistar rats with high fat diet (HFD) and subsequent i.p injection of STZ (35mg/kg). Diabetic animals (serum glucose above 250mg/dl) were treated with Okra powder (200mg/kg)supplemented in diet or metformin (200mg/kg) for 30days. Animals were euthanized and insulin resistance markers (insulin and glucose levels and HOMA-IR), ovarian expression of apoptotic/antiapoptotic genes (Bax,caspase3 and Bcl2) and serum oxidant/antioxidant levels (SOD,GPX and CAT activities and MDA level) were determined. The ovaries were also processed for histological study. Hyperglycemia and reduced body weight of diabetic rats were improved after administration of Okra for 30days. This effect was relatively similar to metformin. Okra resulted in reduction of follicular atresia in concomitant with down regulation of apoptotic related genes (Bax and caspase3) in ovary of diabetic rats. Okra could also diminished oxidative stress in diabetic rats by increasing of serum GPX and CAT activities and reducing the lipid peroxidation level. The results of the present study revealed that Okra powder could be useful intervention for improvement of ovaian dysfunction in diabetic rat by three probable mechanisms; attenuation of glucotoxicity, down regulation of ovarian apoptosis related genes and reduction of oxidative stress.