Central Amygdala Prepronociceptin-Expressing Neurons Mediate Palatable Food Consumption and Reward

Neuron. 2019 Jun 5;102(5):1037-1052.e7. doi: 10.1016/j.neuron.2019.03.037. Epub 2019 Apr 24.


Food palatability is one of many factors that drives food consumption, and the hedonic drive to feed is a key contributor to obesity and binge eating. In this study, we identified a population of prepronociceptin-expressing cells in the central amygdala (PnocCeA) that are activated by palatable food consumption. Ablation or chemogenetic inhibition of these cells reduces palatable food consumption. Additionally, ablation of PnocCeA cells reduces high-fat-diet-driven increases in bodyweight and adiposity. PnocCeA neurons project to the ventral bed nucleus of the stria terminalis (vBNST), parabrachial nucleus (PBN), and nucleus of the solitary tract (NTS), and activation of cell bodies in the central amygdala (CeA) or axons in the vBNST, PBN, and NTS produces reward behavior but did not promote feeding of palatable food. These data suggest that the PnocCeA network is necessary for promoting the reinforcing and rewarding properties of palatable food, but activation of this network itself is not sufficient to promote feeding.

Keywords: binge eating; central amygdala; nociceptin; nucleus of the solitary tract; obesity; parabrachial nucleus; reward.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adiposity
  • Animals
  • Body Weight
  • Central Amygdaloid Nucleus / metabolism*
  • Central Amygdaloid Nucleus / physiology
  • Diet, High-Fat
  • Feeding Behavior / physiology*
  • Mice
  • Neural Pathways
  • Neurons / metabolism*
  • Neurons / physiology
  • Parabrachial Nucleus / metabolism
  • Parabrachial Nucleus / physiology
  • Patch-Clamp Techniques
  • Protein Precursors / genetics
  • Protein Precursors / metabolism*
  • Receptors, Opioid / genetics
  • Receptors, Opioid / metabolism*
  • Reward*
  • Septal Nuclei / metabolism
  • Septal Nuclei / physiology
  • Solitary Nucleus / metabolism
  • Solitary Nucleus / physiology


  • Protein Precursors
  • Receptors, Opioid
  • prepronociceptin