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Association of circulating exosomal miR-122 levels with BAT activity in healthy humans

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Title: Association of circulating exosomal miR-122 levels with BAT activity in healthy humans
Authors: Okamatsu-Ogura, Yuko Browse this author →KAKEN DB
Matsushita, Mami Browse this author
Bariuan, Jussiaea Valente Browse this author
Nagaya, Kazuki Browse this author
Tsubota, Ayumi Browse this author
Saito, Masayuki Browse this author
Issue Date: 13-Sep-2019
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 9
Start Page: 13243
Publisher DOI: 10.1038/s41598-019-49754-1
Abstract: Brown adipose tissue (BAT) plays an important role in body fat accumulation and the regulation of energy expenditure. Since the role of miRNAs in the pathogenesis of obesity and related metabolic diseases is contentious, we analyzed exosomal miRNAs in serum of healthy subjects with special references to BAT activity and body fat level. Forty male volunteers aged 20-30 years were recruited. Their BAT activity was assessed by fluorodeoxyglucose positron emission tomography and computed tomography after 2 h of cold exposure and expressed as a maximal standardized uptake value (SUVmax). Exosomal miRNA levels was analyzed using microarray and real-time PCR analyses. The miR-122-5p level in the high BAT activity group (SUV >= 3) was 53% lower than in the low BAT activity group (SUVmax <3). Pearson's correlation analysis revealed that the serum miR-122-5p level correlated negatively with BAT activity and the serum HDL-cholesterol, and it correlated positively with age, BMI, body fat mass, and total cholesterol and trig lyceride serum levels. Multivariate regression analysis revealed that BAT activity was associated with the serum miR-122-5p level independently of the other parameters. These results reveal the serum exosomal miR-122-5p level is negatively associated with BAT activity independently of obesity.
Type: article
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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