alexa Case-Controlled, Cross-Sectional Evidence that Spinal Cord Injury Associated with Sympathetic Decentralisation may Alter Osteocalcin Signalling
ISSN: 2329-9096

International Journal of Physical Medicine & Rehabilitation
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Research Article

Case-Controlled, Cross-Sectional Evidence that Spinal Cord Injury Associated with Sympathetic Decentralisation may Alter Osteocalcin Signalling

Lynnette M Jones1*, Michael Legge2 and Lee Stoner3

1School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand

2Michael Legge, Department of Biochemistry, University of Otago, Dunedin, New Zealand

3Lee Stoner, School of Sport and Exercise, Massey University, Wellington, New Zealand

*Corresponding Author:
Lynnette M Jones
School of Physical Education, Sport and Exercise Sciences
University of Otago, PO Box 56, Dunedin, New Zealand
Tel: 64 3 479 8962
Fax: 64 3 479 8309
E-mail: [email protected]

Received Date: July 25, 2014; Accepted Date: August 21, 2014; Published Date: August 25, 2014

Citation: Jones LM, Legge M, Stoner L (2014) Case-Controlled, Cross-Sectional Evidence that Spinal Cord Injury Associated with Sympathetic Decentralisation may Alter Osteocalcin Signalling. Int J Phys Med Rehabil 2:224. doi: 10.4172/2329-9096.1000224

Copyright: © 2014 Jones LM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Objective: Osteocalcin has been shown to exert an endocrine influence on bone and energy metabolism in both animals and humans; recent evidence indicating a regulatory role for osteocalcin in glucose homeostasis and energy metabolism and as a marker for bone metabolism. The aim of this study was to investigate the interaction between osteocalcin, body composition, and blood biomarkers in men with spinal cord injury (SCI) compared with able-bodied male controls. Materials and Methods: Twenty men with SCI were matched for age, height, and weight with 20 able-bodied controls. Body composition, bone density and blood levels of adiponectin, leptin, insulin, glucose, insulin-like growth factor-1 (IGF-1) were undertaken. Total body and regional fat mass (FM), fat free mass (FFM), total body bone mineral density (BMD) and circulating levels of blood biomarkers were compared between the two groups and correlation analyses performed between osteocalcin and all measures. Results: Compared with controls, SCI had lower total and leg FFM (P<0.05), but higher total and regional FM (P<0.05). Osteocalcin negatively correlated with age (P<0.05), and positively with total, trunk and arm FFM, and IGF-1 (P<0.05) in SCI men. Negative correlations between osteocalcin and age (P<0.05) and positive correlations with total and all regional FM depots, leptin, fasting glucose, and IGF-1 (P<0.05) were found for the controls. Conclusions: Crosstalk between fat mass, osteocalcin, glucose metabolism and adipokines is lost with decentralisation in the sympathetic nervous system (SNS). The clinical impact of this decentralisation deserves further investigation. These findings do not imply causality, but should be considered hypothesis generating.

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