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Psychopharmacology

, Volume 221, Issue 4, pp 693–700 | Cite as

Sibutramine promotes amygdala activity under fasting conditions in obese women

  • Kerstin M. OltmannsEmail author
  • Marcus Heldmann
  • Susanne Daul
  • Silke Klose
  • Michael Rotte
  • Michael Schäfer
  • Hans-Jochen Heinze
  • Thomas F. Münte
  • Hendrik Lehnert
Original Investigation

Abstract

Rationale

Sibutramine, a centrally-acting selective monoamine reuptake inhibitor, has been used as an appetite suppressant drug in obesity.

Objectives

To gain insight into the central nervous actions of sibutramine, brain responses to pictures of food items after sibutramine vs placebo application were assessed by functional magnetic resonance imaging (fMRI) in obese women.

Methods

In a randomized double-blind crossover design, 10 healthy obese women (BMI 31.8–39.9 kg/m2) received 15 mg/d of sibutramine vs placebo for 14 d. Obese participants, and a group of 10 age-matched normal weight controls, viewed pictures of food items and control objects in hungry and satiated states while lying in the MR scanner. The paradigm followed a block design. In obese participants, fMRI measurements were conducted prior and after two weeks of daily sibutramine or placebo administration, whereas control participants were scanned only at one point in time.

Results

Upon food item presentation, obese participants showed increased brain activity in areas related to emotional and reward processing, perceptual processing, and cognitive control as compared to normal weight controls. Sibutramine exerted a divergent satiety-dependent effect on amygdala activity in obese participants, increasing activity in the hungry state while decreasing it under conditions of satiation.

Conclusions

Our results demonstrate a modulatory influence of sibutramine on amygdala activity in obese women which may underlie the appetite suppressant effects of the drug.

Keywords

Obesity Appetite Body weight fMRI Reward Satiety Hunger Weight loss 

Notes

Acknowledgments

The study was supported by an unrestricted educational grant by Abbott GmbH & Co. KG, Germany. KMO, TFM, and HL were supported by grants of the German Research Foundation (DFG) and the Federal Ministry of Education and Research (BMBF). The funding source had no role in design, analyses, interpretation, or publication of this article.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Kerstin M. Oltmanns
    • 1
    Email author
  • Marcus Heldmann
    • 3
  • Susanne Daul
    • 4
  • Silke Klose
    • 4
  • Michael Rotte
    • 5
  • Michael Schäfer
    • 5
  • Hans-Jochen Heinze
    • 5
  • Thomas F. Münte
    • 3
  • Hendrik Lehnert
    • 2
  1. 1.Department of Psychiatry and PsychotherapyUniversity of LuebeckLuebeckGermany
  2. 2.Department of Internal Medicine IUniversity of LuebeckLuebeckGermany
  3. 3.Department of NeurologyUniversity of LuebeckLuebeckGermany
  4. 4.Division of Endocrinology and MetabolismMagdeburg University Medical School, Otto von Guericke University MagdeburgMagdeburgGermany
  5. 5.Department of NeurologyMagdeburg University Medical School, Otto von Guericke University MagdeburgMagdeburgGermany

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