Teng Wei, Qiu Chunguang, He Zhaohui, Wang Guoliang, Xue Yongliang, Hui Xuezhi
Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
Department of Cardiology, The First Affiliated Hospital of Henan University, Kaifeng 475000, China.
Oncotarget. 2017 Jun 28;8(49):85014-85023. doi: 10.18632/oncotarget.18777. eCollection 2017 Oct 17.
Dysfunction of vascular endothelial cells (VECs), such as increased apoptosis and diminished migration, is closely connected with most cardiovascular diseases and angiogenesis-related events. LncRNAs have been involved in regulation of many pathological processes, but their roles in vascular endothelial function are hardly underreported. Here, we explore the role of a intergenic lncRNA named linc00152 in the apoptosis and migration of VECs. We found that linc00152 was downregulated in human umbilical vein VECs (HUVECs) in a dose- and time-dependent manner following treatment with oxLDL, which is a typical proinflammatory factor in the initiation and progression of vascular endothelial dysfunction. Gain- and loss-function experiments indicated that linc00152 distinctly inhibited apoptosis and improved migration in oxLDL-treated HUVECs. By sponging miR-4767, linc00152 positively regulated the expression of Bcl2L12 and EGFR proteins. Moreover, blocking miR-4767 rescued the decrease of Bcl2L12 and EGFR caused by linc00152 knockdown, as well as the changes in cell apoptosis and migration. Our findings propose a novel role of linc00152 in the improvement of vascular endothelial function and a potential target for the therapy of some cardiovascular diseases.
血管内皮细胞(VECs)功能障碍,如凋亡增加和迁移能力减弱,与大多数心血管疾病和血管生成相关事件密切相关。长链非编码RNA(lncRNAs)参与了许多病理过程的调控,但其在血管内皮功能中的作用鲜有报道。在此,我们探究一种名为linc00152的基因间lncRNA在VECs凋亡和迁移中的作用。我们发现,在用氧化型低密度脂蛋白(oxLDL)处理后,人脐静脉血管内皮细胞(HUVECs)中linc00152呈剂量和时间依赖性下调,oxLDL是血管内皮功能障碍发生和发展过程中的一种典型促炎因子。功能获得和功能缺失实验表明,linc00152能显著抑制oxLDL处理的HUVECs的凋亡并改善其迁移能力。通过海绵吸附miR-4767,linc00152正向调节Bcl2L12和表皮生长因子受体(EGFR)蛋白的表达。此外,阻断miR-4767可挽救因linc00152敲低导致的Bcl2L12和EGFR的减少,以及细胞凋亡和迁移的变化。我们的研究结果揭示了linc00152在改善血管内皮功能方面的新作用,以及其作为某些心血管疾病治疗潜在靶点的可能性。