Abstract
Chronic liver injuries and their complications are leading causes of death, especially in developing countries (Sharma and Nagalli in Sex/Gender-Specific Medicine in the Gastrointestinal Diseases, StatPearls Publishing, 2023). The available and effective treatment plans are limited, implicating the need for innovative treatment approaches (Tsuchiya et al. in Inflamm Regener, 2019;Sharma and Nagalli in Sex/Gender-Specific Medicine in the Gastrointestinal Diseases, StatPearls Publishing, 2023;Younossi et al. in Clin Gastroenterol Hepatol 21:1978-1991, 2023;). This paper aims to summarize the effects and mechanisms of hUC-MSC-exo on liver injuries and its complications; it also suggests future directions for future research. The outcomes of interest are the morphology and histology of the liver, pathology score, liver function enzyme, glucose and lipid metabolism, and the effect hUC-MSC-exo had on gene regulation regarding liver diseases. A comprehensive review of nineteen studies was conducted to assess the effectiveness of the implementation of the hUC-MSC-Exo, instilling confidence in the validity of the findings. Regarding the morphology and histology of the liver and pathology score, hUC-MSC-exo treatment resulted in improved liver morphology post-treatment, as indicated by the reduction in pathology scores. However, these observed improvements in the liver surface are not directly attributed to the hUC-MSC-Exo itself but to the overall healing processes stimulated by the treatment. In physiological outcomes, hUC-MSC-exo also improves glucose and lipid metabolism, especially in diet-induced liver injury and its complications. In gene regulation, one interesting gene in this intervention is the fat mass and obesity-associated (FTO), in which hUC-MSC-exo combined with miRNAs can suppress FTO. HUC-MSC-Exo can improve by utilizing several possible pathways, targeting pinpoints in the pathogenesis of liver disease or glucose and lipid metabolism. This study presents hUC-MSC-exo better in all outcomes of interest compared to the control or sham group. Further specification of indications of the hUC-MSC-exo method may be beneficial and essential to be analyzed in future reviews to better understand the effectiveness of each hUC-MSC-exo dose, duration, and medium.
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