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International Journal of Endocrinology
Volume 2014 (2014), Article ID 323407, 6 pages
http://dx.doi.org/10.1155/2014/323407
Research Article

Increased Circulating Betatrophin Concentrations in Patients with Type 2 Diabetes

1Department of Medical Cell Biology, Uppsala University, Husargatan 3, P.O. Box 571, 75123 Uppsala, Sweden
2Department of Medical Sciences, Uppsala University Hospital, Uppsala University, 75185 Uppsala, Sweden
3Department of Public Health Care, Uppsala University, Husargatan 3, P.O. Box 564, 75122 Uppsala, Sweden

Received 2 April 2014; Accepted 7 May 2014; Published 22 May 2014

Academic Editor: Matthew Watt

Copyright © 2014 Daniel Espes et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Betatrophin has recently been described as a key hormone to stimulate beta-cell mass expansion in response to insulin resistance and obesity in mice. The finding has generated an interest in the development of antidiabetic drugs with betatrophin as the active component. However, the circulating levels of betatrophin in patients with type 2 diabetes are not well known. Betatrophin concentrations in plasma of 27 type 2 diabetes patients and 18 gender-, age-, and BMI-matched controls were measured. Study participants were characterized with regard to BMI, waist and hip circumference, blood pressure, and fasting plasma blood lipids, creatinine, glucose, HbA1c, and C-peptide. HOMA2 indices were calculated. Betatrophin was 40% higher in patients with type 2 diabetes ( versus  pg/mL). Betatrophin positively correlated with age in the controls and with HbA1c in the type 2 diabetes patients. All study participants were insulin resistant with mean HOMA2B IR in both groups exceeding 2 and %. Control individuals had impaired fasting glucose concentrations. In this report on betatrophin concentrations in type 2 diabetes and insulin resistance, elevated betatrophin levels were measured in the patients with type 2 diabetes. Future studies are clearly needed to delineate the exact role, if any, of betatrophin in regulating human beta-cell mass.