Exp Clin Endocrinol Diabetes 2010; 118(5): 310-314
DOI: 10.1055/s-0029-1224124
Article

© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York

Effect of Glucocorticoid-, Parathyroid- and Thyroid Hormones Excess on Human Iliac Crest Bone Matrix Insulin-like Growth Factor (IGF)-I in Patients with Osteoporosis

C. E. Pepene1 , T. Seck2 , I. Diel3 , H. W. Minne4 , R. Ziegler5 , J. Pfeilschifter6
  • 1University of Medicine and Pharmacy Cluj-Napoca, Endocrinology, Cluj-Napoca, Romania
  • 2University of Heidelberg, Department of Internal Medicine I, Heidelberg, Germany
  • 3University of Heidelberg, Department of Gynecology, Heidelberg, Germany
  • 4Klinik “Der Furstenhof”, Bad Pyrmont, Germany
  • 5University of Heidelberg, Department of Internal Medicine I, Heidelberg, Germany
  • 6University of Bochum, Department of Medicine, Bochum, Germany
Further Information

Publication History

received 01.12.2008 first decision 03.04.2009

accepted 06.05.2009

Publication Date:
08 December 2009 (online)

Abstract

Insulin-like growth factor-I (IGF-I) is a well documented bone-active growth factor. Clinical studies reported that circulating hormones may affect serum IGF-I levels, with potential consequences on bone remodeling. However, no data on bone matrix concentrations of IGF-I in subjects with endocrine dysfunction is available in humans. Bone mineral density and cancellous bone matrix IGF-I levels were assessed in iliac crest biopsies from 38 patients with low bone mass related to glucocorticoid- (n=10), parathyroid- (n=14) or thyroid (n=14) hormones excess. Results were compared to those of sex- and age-matched patients with primary osteoporosis. Bone matrix extraction was performed based on a guanidine-chlorhidric acid/ethylendiamine-tetraacetic acid method. Long-term glucocorticoid therapy (≥24 months) led to significantly lower cancellous bone matrix IGF-I levels in comparison to age-matched controls (p=0.03). Although higher trabecular bone IGF-I levels were seen in hyperparathyroid subjects, the difference was not significant in comparison to controls (p=0.24). Likewise, no difference was noticed in cancellous bone matrix IGF-I concentrations between subjects with low bone mass and sub-clinical or overt thyrotoxicosis and euthyroid controls. Neither parathyroid hormone (PTH) nor thyroxin (T4) concentrations were associated with bone matrix IGF-I levels. To conclude, our study documented that in vivo long-term corticotherapy is associated with low trabecular human bone matrix IGF-I. In contrast, no influence of increased circulating parathyroid- or thyroid hormones levels on human iliac crest skeletal IGF-I concentrations was observed.

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Correspondence

Prof. C. E. Peppene

University of Medicine and Pharmacy Cluj-Napoca Endocrinology

Louis Pasteur Street 3

Cluj-Napoca

3400 Romania

Phone: +40/744/91 50 42

Email: c_e_georgescu@yahoo.com