Abstract

Podocyte apoptosis in glomerular lesions has been found to have a dominant role in the progression of diabetic nephropathy. The present research aimed to explore the beneficial effect of icariin on diabetic podocytes by interfering in the process of apoptosis. Podocyte apoptosis was significantly exacerbated after high glucose treatment, with the level of reactive oxygen species (ROS) increasing simultaneously. Here, we demonstrated that icariin, which is a G protein-coupled estrogen receptor 1 (GPER) agonist, inhibited podocyte apoptosis by reducing ROS, maintaining the integrity of mitochondrial membranes. Moreover, the stabilization of mitochondria by icariin was reversed when GPER was knocked down in podocytes. Meanwhile, icariin inhibited the caspase cascade in podocyte apoptosis by promoting Bcl-2 expression and mitochondrial translocation. The above findings at least partly elucidated the mechanism by which icariin stabilized podocytes by inducing the mitochondrial Bcl-2 translocation and therefore preventing downstream apoptosis.

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