IL-6 promotes cell adhesion in human endothelial cells via microRNA-126-3p suppression.
Exp Cell Res
; 393(2): 112094, 2020 08 15.
Article
em En
| MEDLINE
| ID: mdl-32439495
ABSTRACT
Atherosclerosis is an important underlying cause of cardiovascular diseases; vascular endothelial cells play a vital role in inflammatory responses in the initial steps of atherosclerosis. High levels of the pro-inflammatory cytokine interleukin-6 (IL-6) long have been considered a risk factor in the development and complications of atherosclerotic disease. However, it is still controversial whether IL-6 is atherogenic or atheroprotective. Recently, miR-126-3p, an endothelial cell-specific microRNA, has been proposed as an atheroprotective molecule. Therefore, we investigated whether IL-6 accelerates endothelial cell responses through the suppression of miR-126-3p expression in human endothelial cell line EA.hy926. IL-6 yielded concentration-dependent decreases in miRNA-126-3p accumulation in EA.hy926 cells, leading in turn to increased expression of genes targeted by miRNA-126-3p. In addition, adhesion of the human monocyte cell line THP-1 was enhanced by the exposure of EA.hy926 cells to IL-6, with associated increases in the levels of the adhesion molecule intercellular adhesion molecule-1 (ICAM-1). Suppression of miR-126-3p expression resulted in upregulation of miRNA-126-3p-regulated genes, enhanced adhesion of THP-1 cells, and increased ICAM-1 accumulation in EA.hy926 cells. In contrast, miR-126-3p overproduction had the opposite effects. The regulation of miRNA-126-3p by IL-6 may have important implications for the development of novel protective therapies targeting atherosclerosis.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Interleucina-6
/
MicroRNAs
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Exp Cell Res
Ano de publicação:
2020
Tipo de documento:
Article