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DOI: 10.1055/s-2008-1078749
© Georg Thieme Verlag KG Stuttgart · New York
Platelet Monoamine Oxidase Activity in Underweight and Weight-Recovered Females with Anorexia Nervosa
Publication History
received 12.12.2007
revised 18.03.2007
accepted 04.04.2008
Publication Date:
09 December 2008 (online)
Abstract
Introduction: Central serotonergic pathways may play an important role in the etiology of anorexia nervosa (AN). Although platelet monoamine oxidase activity (MAO-B) has been proposed as an index of cerebral serotonin activity, studies in patients with AN are scarce.
Methods: Platelet MAO-B activity was determined in 59 acutely underweight AN patients (acAN, aged 14–29 years, BMI=15.2±1.4), 35 weight-recovered AN patients (recAN, aged 15–29, BMI=20.8±2.2) and 59 healthy control women (HCW, aged 14–26, BMI=21.6±2.1). Plasma leptin served as an indicator of malnutrition. Results were compared by ANCOVA controlling for confounding variables.
Results: Platelet MAO-B activity in acAN patients (5.2±1.4 nmol/109plt×15 min) was similar to HCW (5.5±1.9) but significantly lower in recAN patients (4.4±1.5). BMI and leptin showed a significant negative correlation with MAO-B activity in AN patients, but not in HCW.
Discussion: Our results highlight the importance of malnutrition for the interpretation of abnormalities in neurotransmitter systems in AN. Whether low MAO-B activity in weight-recovered AN patients indicates a premorbid trait or a secondary change due to recovery remains to be elucidated.
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Correspondence
S. EhrlichMD
Universitätsmedizin Berlin
Department of Child and Adolescent Psychiatry
Psychosomatics and Psychotherapy, CVK
Augustenburger Platz 1
13353 Berlin
Germany
Phone: +49/30/450 56 62 57
Fax: +49/30/450 56 69 23
Email: stefan.ehrlich@charite.de