Circulating MOTS-c levels are decreased in obese male children and adolescents and associated with insulin resistance

Caiqi Du; Cai Zhang; Wei Wu; Yan Liang; Anru Wang; Shimin Wu; Yue Zhao; Ling Hou; Qin Ning; Xiaoping Luo

doi:10.1111/pedi.12685

Circulating MOTS-c levels are decreased in obese male children and adolescents and associated with insulin resistance

Pediatr Diabetes. 2018 Apr 25. doi: 10.1111/pedi.12685. Online ahead of print.

Authors

Caiqi Du¹, Cai Zhang¹, Wei Wu¹, Yan Liang¹, Anru Wang^{1

2}, Shimin Wu¹, Yue Zhao¹, Ling Hou¹, Qin Ning³, Xiaoping Luo¹

Affiliations

¹ Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
² Department of Pediatrics, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
³ Department of Infectious Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

PMID: 29691953
DOI: 10.1111/pedi.12685

Abstract

Background and aims: A novel bioactive peptide, mitochondrial-derived peptide (MOTS-c), has recently attracted attention as a potential prevention or therapeutic option for obesity and type 2 diabetes mellitus (T2DM). MOTS-c profiles have not yet been reported in human obesity and T2DM. We aimed to determine circulating MOTS-c levels in obesity and explore the association between MOTS-c levels and various metabolic parameters.

Methods: In this case-control study, 40 obese children and adolescents (27 males) and 57 controls (40 males) were recruited in the Hubei Province of China in 2017. Circulating MOTS-c levels were measured, clinical data (eg, glucose, insulin, and lipid profile) were recorded, and anthropometric measurements were performed. Finally, we investigated correlations between MOTS-c levels and related variables.

Results: MOTS-c levels were significantly decreased in the obese group compared with the control group (472.61 ±22.83 vs 561.64 ±19.19 ng/mL, P <.01). After classification by sex, MOTS-c levels were significantly decreased in obese male children and adolescents compared to their counterparts (465.26 ±24.53 vs 584.07 ±21.18 ng/mL, P <.001), while they were comparable between the obese and healthy female subjects (487.89 ±49.77 vs 508.85 ±38.76 ng/mL, P >.05). Further, MOTS-c levels were negatively correlated with body mass index (BMI), BMI SD score, waist circumference, waist-to-hip ratio, fasting insulin level, homeostasis model assessment of insulin resistance (HOMA-IR), and glycated hemoglobin (HbA1c) in the male cohort.

Conclusions: Circulating MOTS-c levels were decreased in obese male children and adolescents and correlated with markers of insulin resistance and obesity.

Keywords: MOTS-c; childhood obesity; insulin resistance; mitochondrial-derived peptide.