Effects of miR-24 on Endothelial Nitric Oxide Synthase Gene Expression and Tube Formation in Human Umbilical Vein Endothelial Cells
10.3969/j.issn.1000-3614.2016.08.017
- VernacularTitle:微小核糖核酸-24对内皮型一氧化氮合酶基因表达的调节及其对血管内皮细胞管腔形成的影响
- Author:
Wei CHEN
;
Guojun MO
;
Xuelan LUO
;
Hui WANG
;
Peng YANG
;
Hesheng OU
- Publication Type:Journal Article
- Keywords:
RNA;
Tube formation;
Endothelial nitric oxide synthase;
Sp1
- From:
Chinese Circulation Journal
2016;31(8):797-801
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the effects of miR-24 on endothelial nitric oxide synthase (eNOS) gene expression with regulation and endothelial cell proliferation, migration, tube formation in human umbilical vein endothelial cells (HUVECs). Methods: Constructed high expression plasmid of miR-24 and miR-24 antisense sequence were introduced into HUVECs and the cells included in 3 groups: Control group, miR-24 group and miR-24 inhibitor group. HUVEC proliferation was detected by MTT test, migration was measured by Scratching and Transwell methods, tube formation was examined by Matrigel assay; mRNA and protein expressions of eNOS and Sp1were determined by RT-PCR and Western blot analysis respectively. Results:①Compared with Control group, miR-24 group had decreased cell proliferation by 45.45% as (0.36 ± 0.04) vs (0.66 ± 0.08),P<0.05; miR-24 group had lower speed of cell migration, decreased number of cell migration by 74.75% as (30.25±3.78) vs (119.80±10.94),P<0.01 and there was no obvious tube formation.②Compared with Control group, miR-24 group showed reduced eNOS mRNA expression by 46.2% as (0.49±0.02) vs (0.91±0.01),P<0.05, reduced protein expression by 49.07% as (0.55±0.05) vs (1.08±0.05),P<0.05; meanwhile, decreased Sp1 mRNA expression by 44.9% as (0.49±0. 01) vs (0. 89±0.02)P<0.05, decreased protein expression by 54.90% as (0.46±0.02) vs (1.02±0.04),P<0.05. In miR-24 inhibitor group, the above indexes were lower than Control group but higher than miR-24 group, the amount of tube formation and the length of tubes were similar between Control group and miR-24 inhibitor group. Conclusion: MiR-24 may inhibit HUVECs proliferation, migration, tube formation and suppress eNOS expression; Sp1 might be one of the important regulators.
