Abstract
ABSTRACT Previous studies show that Long non-coding RNAs (LncRNAs) are involved in the regulation of various human diseases. This study aimed to reveal how LncRNA CRNDE regulated vascular smooth muscle cells (VSMCs) proliferation and apoptosis in abdominal aortic aneurysms (AAA). Here, we found CRNDE was down-regulated in AAA tissues and AngII-stimulated VSMCs. The overexpression of CRNDE promoted VSMCs proliferation and inhibited cell apoptosis. The interaction between CRNDE and Bcl-3 or Bcl-3 and Smad3 was verified. The interference with Bcl-3 or CRNDE reduced Smad3 stability or promoted Smad3 ubiquitination. After pcDNA-CRNDE or pcDNA-CRNDE+si-Bcl-3 was transfected into VSMCs and stimulated with AngII, CRNDE affected VSMCs proliferation and apoptosis via regulating Smad3 via Bcl-3. Vivo experiments showed the overexpression of CRNDE repressed AAA growth. Therefore, we concluded that CRNDE was down-regulated in AAA tissues and AngII-stimulated VSMCs. Furthermore, the overexpression of CRNDE promoted VSMCs proliferation and repressed cell apoptosis in AAA by up-regulating Smad3 via Bcl-3.
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