alexa Insulin and#8211;like Growth Factor 1 in Adolescent Girls with Anorexia Nervosa: Relation to Bone Formation Parameters | OMICS International | Abstract
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Journal of Psychological Abnormalities
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Research Article

Insulin –like Growth Factor 1 in Adolescent Girls with Anorexia Nervosa: Relation to Bone Formation Parameters

Rasha T Hamza1 and Doaa H Hewedi 2*

1Department of Pediatrics, Ain Shams University, 21 Mahmoud El Badry Street, Nasr City, Cairo, Egypt

2Department of Psychiatry, Faculty of Medicine, Ain Shams University, 21 Mahmoud El Badry Street, Nasr City, Cairo, Egypt

Corresponding Author:
Dr. Doaa H Hewedi
MD, Department of Psychiatry, Faculty of Medicine
Ain Shams University, 21 Mahmoud El Badry Street, Nasr City, Cairo,Egypt
Tel: + 20 2 26710897
Fax: + 20 226710897
E-mail: [email protected]

Received date: Aprial 01, 2014; Accepted date: August 04, 2014; Published date: August 20, 2014

Citation: Hamza RT and Hewedi DH (2014) Insulin –like Growth Factor 1 in Adolescent Girls with Anorexia Nervosa: Relation to Bone Formation Parameters. J Psychol Abnorm Child 3:128. doi:10.4172/2329-9525.1000128

Copyright: © 2014 Hamza RT, 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: Puberty is associated with marked changes in body weight and hormonal profile related to pubertal stage such as insulin-like growth factor 1 (IGF-1). These changes are also associated with Anorexia Nervosa (AN) and may impact bone. Thus our study aimed to study bone metabolism and possible etiology of osteopenia in Egyptian adolescent AN girls.

Method: Twenty five adolescent girls were studied compared to 30 healthy age - and pubertal stage- matched controls. All participants were subjected to clinical evaluation, neuropsychiatric assessment, auxological measurements, bone age assessment, bone density and body composition assessment; and measurement of serum growth hormone (GH), IGF-1, ionized calcium, phosphorus, 25 hydroxy vitamin D [25-(OH)D] and serum osteocalcin (OC).

Results: Lean body mass and Bone Mineral Density (BMD) were significantly reduced in AN patients compared with controls even when controlled for height. Serum GH was elevated significantly in patients (P=0.02). Serum IGF-1 level was reduced significantly in AN (P=0.0001). Serum ionized calcium, vitamin D and OC levels were significantly lower in patients (P=0.03, 0.04 and 0.02 respectively). IGF-1 was strongly positively correlated with OC in patients (r=0.865; P=0.001). In stepwise regression analysis, IGF-1 caused 73% (r2=0.75; P=0.001) of variation in OC levels in AN.

Discussion: This study describes low bone formation in AN compared with age - and pubertal stage-matched adolescents. Serum levels of IGF-1 are highly correlated with bone formation and thus, IGF-1 measurement can be used as a marker for bone osteoblastic activity in AN.

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