Abstract
Insulin resistance (IR) is a significant complication in menopausal women, which predisposes them to cardiovascular disorder, obesity, and diabetes. Cissus quadrangularis is a polyphenolic plant rich in nutrients and is used as an edible vegetable in Nigeria. Previously, we investigated that C. quadrangularis extract (EECQ) treatment ameliorates IR, hyperlipidemia, and overweight in diabetic rats. Accordingly, in the current study, we further evaluated the adiponectin mimetic activity of EECQ in peri-/post-menopausal rats. Perimenopause was induced by High-fat diet/4-vinylcyclohexenediepoxide/(HFD-VCD), while postmenopause was by HFD/bilateral ovariectomy (HFD-OVX). Both the menopausal rats demonstrated an abnormal level of sex hormones, IR, hyperlipidemia, increased fat mass, and abnormal weight gain. Nevertheless, EECQ treated group revealed protection from these untoward complications. Furthermore, the docking score of major constituents of EECQ on adiponectin receptor 1 (AdipoR1) depicted a strong binding affinity, which was comparable to the ligand adipoRon. Besides, AdipoR1 expression determined by RT-PCR, Western blotting, and immunohistochemistry was downregulated in peri-/post-menopausal rats. Similarly, the expression of AdipoR1 downstream marker APPL1 and insulin sensitivity markers, including IRS1, Akt1, and GLUT4, were also dysregulated in menopausal rats. However, EECQ treated rats manifested restoration of normal expression of APPL1, IRS1, Akt1, and GLUT4 by upregulating AdipoR1. Altogether, the current study promulgated the adiponectin mimetic activity of EECQ, which is substantial to mitigate IR in menopausal conditions.
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