Long noncoding RNA H19 promotes vascular remodeling by sponging let-7a to upregulate the expression of cyclin D1.
Biochem Biophys Res Commun
; 508(4): 1038-1042, 2019 01 22.
Article
in En
| MEDLINE
| ID: mdl-30551879
ABSTRACT
Vascular remodeling is mainly caused by excessive proliferation of vascular smooth muscle cells (VSMCs). Noncoding RNAs (ncRNAs) have emerged as important regulators in diverse pathological processes. Previous work has shown the functions and mechanisms of long noncoding RNA H19 (LncRNA H19) on VSMCs. As long noncoding RNAs (lncRNAs) are complex in their mechanisms of action, the aim of the study is to identify if there are any other molecular mechanisms of LncRNA H19 on VSMCs. In vivo studies demonstrated that cyclin D1 was overexpressed in neointima of balloon-injured artery. In vitro studies identified that the overexpression of LncRNA H19 promoted VSMCs proliferation and cyclin D1 upregulation. On the contrary, cellular proliferation and expression of cyclin D1 were inhibited in VSMCs after infection with let-7a. Furthermore, luciferase reporter assays and RNA pull-down assays were used to explore the regulatory mechanism, we found that LncRNA H19 functioned as a competing endogenous RNA (ceRNA) by sponging let-7a to promote the expression of the target gene cyclin D1. In conclusion, LncRNA H19 positively regulated cyclin D1 expression through directly binding to let-7a in VSMCs. Our findings provide new insight into the mechanism of LncRNA H19 in VSMCs proliferation and vascular remodeling, and further indicate the implications of LncRNA H19 in the diagnosis and treatment of vascular proliferative diseases.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Up-Regulation
/
Cyclin D1
/
MicroRNAs
/
RNA, Long Noncoding
/
Vascular Remodeling
Type of study:
Prognostic_studies
Limits:
Animals
/
Humans
/
Male
Language:
En
Journal:
Biochem Biophys Res Commun
Year:
2019
Document type:
Article
Affiliation country:
China