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Izvestia Journal of the Union of Scientists - Varna. Medicine and Ecology Series

Non-alcoholic fatty liver disease and microRNA expression in children

Mihail Siromahov, Niya Rasheva, Krasimira Koleva, Antonia Atanassova, Miglena Georgieva


With the rise of the obesity epidemic in recent decades, non-alcoholic fatty liver disease (NAFLD) has become the leading cause of chronic liver disease, not only in adults but in children as well. At present, the gold standard in diagnosing pediatric NAFLD is liver biopsy – an invasive procedure associated with potentially severe complications. Therefore, the current efforts are directed towards the development of new non-invasive and accessible methods for the early diagnosis of NAFLD. Among the potential biomarkers are the micro-ribonucleic acids (miRNAs) – small molecules made up of 20-25 nucleotides, which exert their biological effect as regulators of protein synthesis. The aim of the present article is to provide a short description of miRNA function in hepatic metabolism and their possible use in diagnosing pediatric NAFLD.


children, obesity, NAFLD, miRNA, diagnostics

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Brandt S, Roos J, Inzaghi E, Kotnik P, Kovac J, Battelino T, et al. Circulating levels of miR-122 and nonalcoholic fatty liver disease in pre-pubertal obese children. Pediatr Obes [Internet]. 2018 Mar;13(3):175–82. Available from:

Condrat CE, Thompson DC, Barbu MG, Bugnar OL, Boboc A, Cretoiu D, et al. miRNAs as Biomarkers in Disease: Latest Findings Regarding Their Role in Diagnosis and Prognosis. Cells [Internet]. 2020 Jan 23 [cited 2020 Nov 12];9(2):276. Available from: /pmc/articles/PMC7072450/?report=abstract

Ding J, Li M, Wan X, Jin X, Chen S, Yu C, et al. Effect of miR-34a in regulating steatosis by targeting PPARα expression in nonalcoholic fatty liver disease. Sci Rep [Internet]. 2015 Sep 2 [cited 2020 Nov 13];5(1):13729. Available from:

Elmén J, Lindow M, Silahtaroglu A, Bak M, Christensen M, Lind-Thomsen A, et al. Antagonism of microRNA-122 in mice by systemically administered LNA-antimiR leads to up-regulation of a large set of predicted target mRNAs in the liver. Nucleic Acids Res [Internet]. 2008 Mar 1 [cited 2020 Sep 6];36(4):1153–62. Available from:

Geneva. Consideration of the evidence on childhood obesity for the Commission on Ending Childhood Obesity Report of the Ad hoc Working Group on Science and Evidence for Ending Childhood Obesity [Internet]. 2016 [cited 2020 Nov 5]. Available from:

Gjorgjieva M, Sobolewski C, Dolicka D, Correia de Sousa M, Foti M. miRNAs and NAFLD: from pathophysiology to therapy. Gut [Internet]. 2019;68(11):2065–79. Available from:

Jampoka K, Muangpaisarn P, Khongnomnan K, Treeprasertsuk S, Tangkijvanich P, Payungporn S. Serum miR-29a and miR-122 as Potential Biomarkers for Non-Alcoholic Fatty Liver Disease (NAFLD). MicroRNA [Internet]. 2018 Sep 6;7(3):215–22. Available from:

Kelsey MM, Zaepfel A, Bjornstad P, Nadeau KJ. Age-related consequences of childhood obesity. Gerontology. 2014;60(3):222–8.

Lin HY, Yang YL, Wang PW, Wang FS, Huang YH. The Emerging Role of MicroRNAs in NAFLD: Highlight of MicroRNA-29a in Modulating Oxidative Stress, Inflammation, and Beyond. Cells. 2020;9(4).

Liu C-H, Ampuero J, Gil-Gómez A, Montero-Vallejo R, Rojas Á, Muñoz-Hernández R, et al. miRNAs in patients with non-alcoholic fatty liver disease: A systematic review and meta-analysis. J Hepatol [Internet]. 2018 Dec;69(6):1335–48. Available from:

Manios Y, Androutsos O, Katsarou C, Vampouli EA, Kulaga Z, Gurzkowska B, et al. Prevalence and sociodemographic correlates of overweight and obesity in a large Pan-European cohort of preschool children and their families: The ToyBox-study. Nutrition [Internet]. 2018;55–56:192–8. Available from:

Miyaaki H, Ichikawa T, Kamo Y, Taura N, Honda T, Shibata H, et al. Significance of serum and hepatic microRNA-122 levels in patients with non-alcoholic fatty liver disease. Liver Int [Internet]. 2014 Aug;34(7):e302-7. Available from:

Oses M, Margareto Sanchez J, Portillo MP, Aguilera CM, Labayen I. Circulating miRNAs as Biomarkers of Obesity and Obesity-Associated Comorbidities in Children and Adolescents: A Systematic Review. Nutrients [Internet]. 2019 Nov 27;11(12):2890. Available from:

Roderburg C, Urban GW, Bettermann K, Vucur M, Zimmermann H, Schmidt S, et al. Micro-RNA profiling reveals a role for miR-29 in human and murine liver fibrosis. Hepatology [Internet]. 2011 Jan [cited 2020 Nov 14];53(1):209–18. Available from:

Thompson MD, Cismowski MJ, Serpico M, Pusateri A, Brigstock DR. Elevation of circulating microRNA levels in obese children compared to healthy controls. Clin Obes [Internet]. 2017 Aug;7(4):216–21. Available from:

Vajro P, Lenta S, Socha P, Dhawan A, McKiernan P, Baumann U, et al. Diagnosis of nonalcoholic fatty liver disease in children and adolescents: Position paper of the ESPGHAN hepatology committee. J Pediatr Gastroenterol Nutr. 2012;54(5):700–13.

Vos MB, Abrams SH, Barlow SE, Caprio S, Daniels SR, Kohli R, et al. NASPGHAN Clinical Practice Guideline for the Diagnosis and Treatment of Nonalcoholic Fatty Liver Disease in Children: Recommendations from the Expert Committee on NAFLD (ECON) and the North American Society of Pediatric Gastroenterology, Hepatology and Nu. J Pediatr Gastroenterol Nutr. 2017;64(2):319–34.

Willeit P, Skroblin P, Moschen AR, Yin X, Kaudewitz D, Zampetaki A, et al. Circulating MicroRNA-122 Is Associated With the Risk of New-Onset Metabolic Syndrome and Type 2 Diabetes. Diabetes [Internet]. 2017 Feb;66(2):347–57. Available from:

Wong RJ, Aguilar M, Cheung R, Perumpail RB, Harrison SA, Younossi ZM, et al. Nonalcoholic Steatohepatitis Is the Second Leading Etiology of Liver Disease Among Adults Awaiting Liver Transplantation in the United States. Gastroenterology [Internet]. 2015 Mar [cited 2019 May 27];148(3):547–55. Available from:

Xiao M, Li J, Li W, Wang Y, Wu F, Xi Y, et al. MicroRNAs activate gene transcription epigenetically as an enhancer trigger. RNA Biol [Internet]. 2017 Oct 3 [cited 2020 Nov 11];14(10):1326–34. Available from:



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