International Journal of Medical Sciences

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19 February 2019

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Int J Med Sci 2019; 16(1):106-114. doi:10.7150/ijms.28093

Research Paper

MicroRNA-320 targeting neuropilin 1 inhibits proliferation and migration of vascular smooth muscle cells and neointimal formation

Hongqiang Li, Jinlong Zhao, Baoxin Liu, Jiachen Luo, Zhiqiang Li, Xiaoming Qin, Yidong Wei

Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Jingan District, Shanghai, People's Republic of China


This study shows that microRNA-320 (miR-320) is associated with many important cell functions, including cell differentiation, proliferation, migration, and apoptosis. However, the role of miR-320 in vascular smooth muscle cells (VSMCs) and proliferative vascular diseases is still completely unclear. In our study, we found that the expression of miR-320 in human VSMCs after PDGF stimulation was significantly down-regulated in time- and dose-dependent manner. Function analyses identified that miR-320 could inhibit the proliferation and migration of VSMCs in both basal and PDGF-stimulated conditions. Furthermore, Neuropilin 1 (NRP1) was demonstrated as a direct target of miR-320 in Luciferase reporter assays and miR-320 overexpression inhibited the expression of NRP1 with or without PDGF treatment. Finally, miR-320 was markedly decreased in mice carotid arteries after ligated injury, while the restoration of miR-320 via Ad-miR-320 attenuated neointimal hyperplasia by declining the NRP1 expression. The results confirmed that miR-320 regulated proliferation and migration of VSMCs and neointimal formation by targeting NRP1. These novel findings implied that the regulation of NRP1 expression by miR-320 has important significance in the early diagnosis and treatment of proliferation vascular diseases.

Keywords: miR-320, proliferation, migration, vascular smooth muscle cell, neointimal formation

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license ( See for full terms and conditions.
How to cite this article:
Li H, Zhao J, Liu B, Luo J, Li Z, Qin X, Wei Y. MicroRNA-320 targeting neuropilin 1 inhibits proliferation and migration of vascular smooth muscle cells and neointimal formation. Int J Med Sci 2019; 16(1):106-114. doi:10.7150/ijms.28093. Available from