# MiR-150-5p attenuates heart failure by targeting MMP14 to regulate vascular smooth muscle cell function

## TL;DR

MiR-150-5p helps prevent heart failure by reducing MMP14 levels, which improves heart function and reduces damage in mice.

## Contribution

This study identifies miR-150-5p as a novel protective microRNA in heart failure by targeting MMP14.

## Key findings

- MiR-150-5p is downregulated in heart failure patients while MMP14 is upregulated.
- Overexpression of miR-150-5p improves cardiac function and reduces fibrosis in a mouse model.
- MiR-150-5p inhibits MMP14, promoting smooth muscle cell functions linked to heart failure progression.

## Abstract

MiR-150-5p is a microRNA that plays an important role in the heart diseases. However, its specific role and molecular mechanism in heart failure (HF) remain unclear. In this study, we found that miR-150-5p was downregulated in patients with HF, while the expression of MMP14 was elevated. In vitro experiments have shown that miR-150-5p directly targets MMP14 and inhibits its expression in human aortic smooth muscle cells (HASMCs). Functionally, miR-150-5p promotes the proliferation, migration and apoptosis of HASMC, which is a key process in the progression of HF. In the HF mouse model induced by transverse aortic contraction (TAC), overexpression of miR-150-5p can improve cardiac function, reduce hypertrophy and fibrosis, while its inhibition aggravates these effects. These findings determined that miR-150-5p is a protective regulator in HF, functioning by inhibiting MMP14, and indicated its potential as a therapeutic target for HF treatment.