Follicle-Stimulating Hormone Accelerates Atherosclerosis by Activating PI3K/Akt/NF-κB Pathway in Mice with Androgen Deprivation

Abstract

<b><i>Objective:</i></b> Follicle-stimulating hormone (FSH) level changes may be another reason for increasing the risk of cardiovascular disease. In this study, we aimed to investigate the role of FSH in atherosclerosis and its underlying mechanism. <b><i>Methods:</i></b> ApoE^−/− mice were divided into 4 groups, namely, the sham group, bilaterally orchidectomized group, FSH group, and testosterone-only group. Blood lipid and hormone levels were tested, aorta Oil Red O staining; the levels of NF-κB, Akt, eNOS, and FSH receptors in the aorta were measured by Western blotting. Expression of VCAM-1 was detected via Western blotting and immunohistochemical staining. Human umbilical vein endothelial cells (HUVECs) were used to induce endothelial injury model by adding FSH, and the levels of NF-κB, Akt, eNOS, and FSHR were tested in HUVECs. <b><i>Results:</i></b> FSH treatment exacerbated atherosclerotic lesions in ApoE^−/− mice. Moreover, FSH could promote the expression of VCAM-1 protein in HUVECs, and this effect was possibly mediated by the activation of NF-κB, while NF-κB activation was further enhanced by the activation of the PI3K/Akt/eNOS pathway. FSH failed to activate Akt and NF-κB in the presence of the PI3K inhibitor LY294002 in HUVECs. <b><i>Conclusion:</i></b> FSH promoted the development of atherosclerosis by increasing VCAM-1 protein expression via activating PI3K/Akt/NF-κB pathway.