Dopamine-based reward circuitry responsivity, genetics, and overeating

Curr Top Behav Neurosci. 2011;6:81-93. doi: 10.1007/7854_2010_89.

Abstract

Data suggest that low levels of dopamine D2 receptors and attenuated responsivity of dopamine-target regions to food intake is associated with increased eating and elevated weight. There is also growing (although mixed) evidence that genotypes that appear to lead to reduced dopamine signaling (e.g., DRD2, DRD4, and DAT) and certain appetite-related hormones and peptides (e.g., ghrelin, orexin A, leptin) moderate the relation between dopamine signaling, overeating, and obesity. This chapter reviews findings from studies that have investigated the relation between dopamine functioning and food intake and how certain genotypes and appetite-related hormones and peptides affect this relation.

Publication types

  • Review

MeSH terms

  • Animals
  • Brain / metabolism*
  • Brain / pathology
  • Catechol O-Methyltransferase / genetics
  • Catechol O-Methyltransferase / metabolism
  • Dopamine / genetics*
  • Dopamine / metabolism*
  • Dopamine Plasma Membrane Transport Proteins / genetics
  • Dopamine Plasma Membrane Transport Proteins / metabolism
  • Ghrelin / genetics
  • Ghrelin / metabolism
  • Humans
  • Hyperphagia* / genetics
  • Hyperphagia* / pathology
  • Hyperphagia* / psychology
  • Obesity / metabolism
  • Obesity / pathology
  • Proto-Oncogene Proteins c-akt / genetics
  • Proto-Oncogene Proteins c-akt / metabolism
  • Receptors, Dopamine D2 / genetics
  • Receptors, Dopamine D2 / metabolism
  • Receptors, Dopamine D4 / genetics
  • Receptors, Dopamine D4 / metabolism
  • Reward*

Substances

  • DRD4 protein, human
  • Dopamine Plasma Membrane Transport Proteins
  • Ghrelin
  • Receptors, Dopamine D2
  • Receptors, Dopamine D4
  • Catechol O-Methyltransferase
  • Proto-Oncogene Proteins c-akt
  • Dopamine