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miR-155 Promotes ox-LDL-Induced Autophagy in Human Umbilical Vein Endothelial Cells

Zhaozhi Zhang1, Xudong Pan1, Shaonan Yang1

  • 1Department of Neurology, The Affiliated Hospital of the Qingdao University, Qingdao, Shandong 266100, China.

Mediators of Inflammation
|June 30, 2017
PubMed

Insights

MicroRNA-155 (miR-155) regulates autophagy in human umbilical vein endothelial cells (HUVECs) during atherosclerosis. Increased miR-155 enhances autophagy, while decreased levels inhibit it, revealing its role in vascular endothelial cells.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cardiovascular Research

Background:

  • Autophagy is a conserved metabolic process implicated in atherosclerosis (AS).
  • MicroRNA-155 (miR-155) is a key regulator in various physiological and pathological conditions, including AS and autophagy.
  • The specific role of miR-155 in endothelial cell autophagy remains largely uncharacterized.

Purpose of the Study:

  • To investigate the function of miR-155 in oxidized low-density lipoprotein (ox-LDL)-induced autophagy.
  • To determine the effect of miR-155 on autophagy in human umbilical vein endothelial cells (HUVECs).

Main Methods:

  • Induction of autophagy using ox-LDL in HUVECs.
  • Quantification of miR-155 expression levels.
  • Manipulation of miR-155 expression (overexpression and knockdown) to assess its impact on autophagic activity.

Main Results:

  • Ox-LDL significantly induced autophagy in HUVECs.
  • Ox-LDL treatment led to a significant increase in miR-155 expression.
  • Overexpression of miR-155 enhanced autophagic activity.
  • Reduced miR-155 expression inhibited autophagy.

Conclusions:

  • miR-155 plays a crucial role in modulating autophagy within vascular endothelial cells.
  • The findings highlight miR-155 as a potential therapeutic target for atherosclerosis-related endothelial dysfunction.

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