MiR-4465-modified mesenchymal stem cell-derived small extracellular vesicles inhibit liver fibrosis development via targeting LOXL2 expression

作者：Yanjin Wang, Yifei Chen, Fuji Yang, Xiaolong Yu, Ying Chu, Jing Zhou, Yongmin Yan, Jianbo Xi · 发表于：Journal of Zhejiang University SCIENCE B · 年份：2024 · DOI：10.1631/jzus.b2300305 · 被引用次数：10 · 研究领域：Liver Disease and Transplantation、Microbial metabolism and enzyme function、Organ Transplantation Techniques and Outcomes

Liver fibrosis is a significant health burden, marked by the consistent deposition of collagen. Unfortunately, the currently available treatment approaches for this condition are far from optimal. Lysyl oxidase-like protein 2 (LOXL2) secreted by hepatic stellate cells (HSCs) is a crucial player in the cross-linking of matrix collagen and is a significant target for treating liver fibrosis. Mesenchymal stem cell-derived small extracellular vesicles (MSC-sEVs) have been proposed as a potential treatment option for chronic liver disorders. Previous studies have found that MSC-sEV can be used for microRNA delivery into target cells or tissues. It is currently unclear whether microRNA-4465 (miR-4465) can target LOXL2 and inhibit HSC activation. Additionally, it is uncertain whether MSC-sEV can be utilized as a gene therapy vector to carry miR-4465 and effectively inhibit the progression of liver fibrosis. This study explored the effect of miR-4465-modified MSC-sEV (MSC-sEV miR-4465 ) on LOXL2 expression and liver fibrosis development. The results showed that miR-4465 can bind specifically to the promoter of the LOXL2 gene in HSC. Moreover, MSC-sEV miR-4465 inhibited HSC activation and collagen expression by downregulating LOXL2 expression in vitro. MSC-sEV miR-4465 injection could reduce HSC activation and collagen deposition in the CCl 4 -induced mouse model. MSC-sEV miR-4465 mediating via LOXL2 also hindered the migration and invasion of HepG2 cells. In conclusion, we found that...