MicroRNA-9 inhibits retinal neovascularization in rats with diabetic retinopathy by targeting vascular endothelial growth factor A.

Abstract:

:Diabetic retinopathy (DR) is a leading cause of adult visual impairment and loss. This study aims to explore the effects of microRNA-9 (miR-9) on retinal neovascularization during DR by targeting the vascular endothelial growth factor A (VEGFA). DR rat models were successfully established. Retinal microvascular endothelial cells (RMECs) of DR rats were isolated and treated with miR-9 mimic, miR-9 inhibitor or small interfering RNA (siRNA)-VEGFA. The expressions of miR-9, VEGFA, and cluster of differentiation 31 (CD31) of the rats' tissues and cells were examined. The targeting relationship between miR-9 and VEGFA was testified. The tubule formation, the cell proliferation and the periodic distribution and apoptosis were evaluated after transfection. In the retinal tissues of DR rats, miR-9 expression decreased while the expression of VEGFA and CD31 increased. Notably, miR-9 targeted and inhibited VEGFA expression. In response to the treatment of miR-9 mimic and siRNA-VEGFA, a reduction was identified in CD31 expression, tubule formation, and proliferation of RMECs and cell ratio in the S phase, but an increase was observed in apoptosis rate of RMECs. The treatment of miR-9 inhibitor reversed the manifestations. Our study demonstrated that miR-9 could inhibit retinal neovascularization of DR and tubule formation, and promote apoptosis in RMECs by targeting VEGFA.

journal_name

J Cell Biochem

authors

Liu WL

doi

10.1002/jcb.28081

subject

Has Abstract

pub_date

2018-11-28 00:00:00

eissn

0730-2312

issn

1097-4644

pub_type

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