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International Journal of Endocrinology
Volume 2017 (2017), Article ID 3106041, 6 pages
Research Article

GH Responsiveness to Combined GH-Releasing Hormone and Arginine Administration in Obese Patients with Fibromyalgia Syndrome

1Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
2Experimental Laboratory for Auxo-Endocrinological Research, Istituto Auxologico Italiano, IRCCS, Milan and Verbania, Italy
3Division of Auxology, Istituto Auxologico Italiano, IRCCS, Verbania, Italy
4Orthopedic Rehabilitation Unit, IRCCS, Istituto Auxologico Italiano, IRCCS, Verbania, Italy

Correspondence should be addressed to Antonello E. Rigamonti

Received 7 April 2017; Revised 25 May 2017; Accepted 30 May 2017; Published 28 June 2017

Academic Editor: Andreas Höflich

Copyright © 2017 Antonello E. Rigamonti 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.


Reportedly, fibromyalgia (FM) is frequently associated with reduced IGF-1 levels and GH hyporesponsiveness to different GH stimulation tests. Since there is a high prevalence of obesity in FM, and obesity itself is characterized by hyposomatotropism, the aim of this study was to assess IGF-1 levels and GH responsiveness in sixteen severely obese women suffering from FM, who, subdivided into two subgroups on the basis of their age-dependent IGF-1 values (> or <−2 SDS), underwent the combined GHRH plus arginine test. Four out of 16 obese women with FM (25%) had low IGF-1 SDS values, 2 cases of this subgroup (12.5%) failing also to normally respond to the test. Among patients with normal GH responses, 4 showed a delayed GH peak. The subgroup with low IGF-1 SDS values had higher BMI than that with normal IGF-1 SDS. GH peak and area under the curve were not correlated with CRP, ESR, or tender point score, while significant correlations were found with fat-free mass and fat mass. In conclusion, this study shows the existence of a high prevalence of GH-IGF-1 dysfunction in patients with both FM and obesity, presumably as a consequence of the obese rather than fibromyalgic condition.