Nesfatin-1 decreases the motivational and rewarding value of food

Riccardo Dore*, Regina Krotenko, Jan Philipp Reising, Luca Murru, Sivaraj Mohana Sundaram, Alessandro Di Spiezio, Helge Müller-Fielitz, Markus Schwaninger, Olaf Jöhren, Jens Mittag, Maria Passafaro, Marya Shanabrough, Tamas L. Horvath, Carla Schulz, Hendrik Lehnert

*Korrespondierende/r Autor/-in für diese Arbeit
2 Zitate (Scopus)

Abstract

Homeostatic and hedonic pathways distinctly interact to control food intake. Dysregulations of circuitries controlling hedonic feeding may disrupt homeostatic mechanisms and lead to eating disorders. The anorexigenic peptides nucleobindin-2 (NUCB2)/nesfatin-1 may be involved in the interaction of these pathways. The endogenous levels of this peptide are regulated by the feeding state, with reduced levels following fasting and normalized by refeeding. The fasting state is associated with biochemical and behavioral adaptations ultimately leading to enhanced sensitization of reward circuitries towards food reward. Although NUCB2/nesfatin-1 is expressed in reward-related brain areas, its role in regulating motivation and preference for nutrients has not yet been investigated. We here report that both dopamine and GABA neurons express NUCB2/nesfatin-1 in the VTA. Ex vivo electrophysiological recordings show that nesfatin-1 hyperpolarizes dopamine, but not GABA, neurons of the VTA by inducing an outward potassium current. In vivo, central administration of nesfatin-1 reduces motivation for food reward in a high-effort condition, sucrose intake and preference. We next adopted a 2-bottle choice procedure, whereby the reward value of sucrose was compared with that of a reference stimulus (sucralose + optogenetic stimulation of VTA dopamine neurons) and found that nesfatin-1 fully abolishes the fasting-induced increase in the reward value of sucrose. These findings indicate that nesfatin-1 reduces energy intake by negatively modulating dopaminergic neuron activity and, in turn, hedonic aspects of food intake. Since nesfatin-1´s actions are preserved in conditions of leptin resistance, the present findings render the NUCB2/nesfatin-1 system an appealing target for the development of novel therapeutical treatments towards obesity.

OriginalspracheEnglisch
ZeitschriftNeuropsychopharmacology
Jahrgang45
Ausgabenummer10
Seiten (von - bis)1645-1655
Seitenumfang11
ISSN0893-133X
DOIs
PublikationsstatusVeröffentlicht - 01.09.2020

Strategische Forschungsbereiche und Zentren

  • Forschungsschwerpunkt: Gehirn, Hormone, Verhalten - Center for Brain, Behavior and Metabolism (CBBM)

DFG-Fachsystematik

  • 205-17 Endokrinologie, Diabetologie, Metabolismus

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