Abstract
Background
Nonalcoholic fatty liver disease (NAFLD) is a chronic disease caused by excessive fat accumulation in the liver in addition to alcohol consumption and other pathological factors. The incidence of NAFLD is rapidly growing, currently affecting 25% of the world population. Exosomes are extracellular vesicles containing a variety of biological molecules, including microRNAs (miRNAs).
Objective
To monitor the expression of exosomal microRNAs in the NAFLD.
Methods
In this study, five nonalcoholic fatty liver patients were included in the disease group, and five simple obesity patients were included in the control group. Exosomes from NAFLD patient serum were collected, and exosomal miRNAs were extracted. Exosomes were isolated and then confirmed by electron microscopy, nanoparticle tracking analysis (NTA) and western blotting. High-throughput sequencing methods were used to determine the expression profile of exosome-derived miRNAs.
Results
The sequencing results revealed that a total of 2588 miRNAs were identified. The expression of 80 miRNAs significantly differed between the NAFLD and control groups, including 30 upregulated and 50 downregulated miRNAs. miR-122-5p, miR‐27a, and miR‐335-5p may play an important role in NAFLD. Finally, GO and KEGG analyses were applied to explore the function of miRNA targets.
Conclusions
Collectively, this study identified some key exosomal miRNAs and pathways in NAFLD that might be used as molecular targets or diagnostic biomarkers for NAFLD.
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Data availability
The original sequencing data are available at the NCBI SRA database: PRJNA706528.
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Funding
This work was supported by the National Natural Science Foundation of China (82071729), Health Commission of Zhejiang Province, China (2021KY1155, 2018KY843, 2018KY847).
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Jian-Wei Zhang and Hai-Tao Pan declare that they have no conflict of interest.
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This study had been approved by the Ethics Committee of Shaoxing Maternal and Child Health Care Hospital. Informed consent was obtained from all individual participants included in the study.
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Zhang, JW., Pan, HT. microRNA profiles of serum exosomes derived from children with nonalcoholic fatty liver. Genes Genom 44, 879–888 (2022). https://doi.org/10.1007/s13258-021-01150-8
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DOI: https://doi.org/10.1007/s13258-021-01150-8