Abstract
In recent years, exosomes, as an important medium of intercellular information transmission, have received extensive attention for their potential in the treatment of liver fibrosis. The purpose of this study was to investigate the role of exosome natural lipid membrane proteins in the treatment of liver fibrosis, with emphasis on the regulatory mechanism through the TGF-β/SMAD signaling pathway. Exosomes were extracted from healthy human hepatocytes and their membrane protein components were identified by mass spectrometry. Subsequently, the effects of these exosomes and their membrane proteins on the TGF-β/SMAD signaling pathway were examined using in vitro cell models and mouse liver fibrosis models. Western blot, qPCR and immunofluorescence were used to analyze the expression of fibrosis markers and the activity of signaling pathways. In vitro cell experiments, fibrotic cells showed an obvious reversal trend after treating exosome membrane proteins. In a mouse model of liver fibrosis, the injection of exosome membrane proteins significantly improved the degree of fibrosis in liver tissue.
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