Pharmacopsychiatry 2008; 41(6): 226-231
DOI: 10.1055/s-2008-1078749
Original Paper

© Georg Thieme Verlag KG Stuttgart · New York

Platelet Monoamine Oxidase Activity in Underweight and Weight-Recovered Females with Anorexia Nervosa

S. Ehrlich 1 , 2 , L. Franke 2 , R. Schott 1 , H. Salbach-Andrae 1 , E. Pfeiffer 1 , U. Lehmkuhl 1 , R. Uebelhack 2
  • 1Charité – Universitätsmedizin Berlin, CVK, Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Berlin, Germany
  • 2Charité – Universitätsmedizin Berlin, CCM, Department of Psychiatry and Psychotherapy, Berlin, Germany
Further Information

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