Human umbilical cord mesenchymal stem cells alleviate fatty liver ischemia-reperfusion injury by activating autophagy through upregulation of IFNγ.
Chenhao XuXixi FangBei LuYisu SongWenzhi ShuZhengyang LuRenyi SuZe XiangXiao XuXuyong WeiPublished in: Cell biochemistry and function (2024)
Liver ischemia-reperfusion injury (IRI) is an important factor affecting the prognosis of liver transplantation, and extended criteria donors (e.g., steatosis donor livers) are considered to be more sensitive to ischemia-reperfusion injury in liver transplantation. Currently, the application of human umbilical cord mesenchymal stem cells (hMSCs) has great promise in the treatment of various injuries in the liver. This study aimed to investigate the therapeutic role and mechanism of hMSCs in fatty liver IRI. After more than 8 weeks of high-fat chow feeding, we constructed a fatty liver mouse model and established ischemic injury of about 70% of the liver. Six hours after IRI, liver injury was significantly alleviated in hMSCs-treated mice, and the expression levels of liver enzyme, inflammatory factor TNF-α, and apoptotic proteins were significantly lower than those of the control group, which were also significant in pathological sections. Transcriptomics analysis showed that IFNγ was significantly upregulated in the hMSCs group. Mechanistically, IFNγ, which activates the MAPK pathway, is a potent agonist that promotes the occurrence of autophagy in hepatocytes to exert a protective function, which was confirmed by in vitro experiments. In summary, hMSCs treatment could slow down IRI in fatty liver by activating autophagy through upregulation of IFNγ, and this effect was partly direct.
Keyphrases
- high fat diet induced
- mesenchymal stem cells
- umbilical cord
- signaling pathway
- ischemia reperfusion injury
- oxidative stress
- liver injury
- cell death
- mouse model
- immune response
- endothelial cells
- poor prognosis
- drug induced
- dendritic cells
- cell proliferation
- endoplasmic reticulum stress
- type diabetes
- fatty acid
- stem cells
- bone marrow
- risk assessment
- wastewater treatment
- adipose tissue
- single cell
- rheumatoid arthritis
- skeletal muscle
- brain injury
- induced pluripotent stem cells
- pi k akt
- blood brain barrier
- pluripotent stem cells
- artificial intelligence
- high fat diet
- deep learning
- combination therapy
- gestational age