title: Leptin therapy in a congenital leptin-deficient patient leads to acute and long-term changes in homeostatic, reward, and food-related brain areas.
abstract: BACKGROUND
  Mutations that lead to congenital leptin deficiency cause severe obesity, hyperphagia, and impaired satiety due to malfunctions of peripheral and brain-related mechanisms.
  
  
  METHODS
  In a leptin-deficient adolescent girl, we investigated brain-related changes before and at two time points after leptin therapy (3 d and 6 months). Functional magnetic resonance imaging was performed during visual stimulation with food (high and low caloric) and nonfood pictures.
  
  
  RESULTS
  Results show acute and long-term effects in the amygdala, the orbitofrontal cortex, and the substantia nigra/ventral tegmental area for the comparison of food and nonfood pictures. For the comparison of high and low caloric pictures, pure acute effects in the ventral striatum and the orbitofrontal cortex could be observed as well as acute and long-term effects in the hypothalamus.
  
  
  CONCLUSIONS
  This study gives additional insight in the influence of leptin therapy on brain functions in leptin deficiency.
authors: MEG Center, University of Tübingen, Tübingen, Germany. sabine.frank@med.uni-tuebingen.de
authors: Sabine
authors: S
authors: Frank
authors: Martin
authors: M
authors: Heni
authors: Anja
authors: A
authors: Moss
authors: Julia
authors: J
authors: von Schnurbein
authors: Andreas
authors: A
authors: Fritsche
authors: Hans-Ulrich
authors: HU
authors: Häring
authors: Sadaf
authors: S
authors: Farooqi
authors: Hubert
authors: H
authors: Preissl
authors: Martin
authors: M
authors: Wabitsch