Abstract
Atherosclerotic cardiovascular disease is the major cause of death worldwide. Low shear stress plays key roles on the initiation and progression of atherosclerosis (As). However, its underlying mechanism remains unclear. In this study, the effect of low shear stress on endothelial mesenchymal transformation (EndMT) and its underlying mechanism were explored. Results showed that in cultured human umbilical vein endothelial cells, low shear stress down-regulated the expression of TET2 and promoted EndMT. Loss of TET2 promoted EndMT with the Wnt/β-catenin signaling pathway. The enhancement in EndMT induced by low shear stress was attenuated by TET2 overexpression. In apoE−/− mice subjected to carotid artery local ligation, the EndMT and atherosclerotic lesions induced by low shear stress was attenuated by TET2 overexpression. Taken together, low shear stress promoted EndMT through the down-regulation of TET2, indicating that intervention with EndMT or the up-regulation of TET2 might be an alternative strategy for preventing As.
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