title: Regulation of the mesocorticolimbic and mesostriatal dopamine systems by α-melanocyte stimulating hormone and agouti-related protein.
abstract: The melanocortin system of the hypothalamus, including the neuropeptides α-melanocyte stimulating hormone (αMSH) and agouti-related protein (AgRP), and their receptors, the melanocortin-3 receptor (MC3R) and melanocortin-4 receptor (MC4R), have been well-studied for their roles in the central control of feeding and body weight. In this review, we discuss the evidence demonstrating that αMSH and AgRP also act on the mesocorticolimbic and mesostriatal dopamine systems to regulate a wide variety of behaviors. In addition to the well described ability of αMSH to increase dopamine transmission and to increase grooming and rearing when injected directly into the ventral tegmental area, a growing body of evidence indicates that αMSH and AgRP can also act on dopamine pathways to regulate feeding and drug abuse, including reward-related behaviors toward food and drugs. Increasing our understanding of how αMSH and AgRP act on dopamine pathways to affect behavior may allow for identification of new strategies to combat disorders involving dysfunction of dopamine pathways, such as obesity and drug abuse.
authors.affiliation: Department of Biology, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States; Neuroscience Institute, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States; Center for Obesity Reversal, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States. Electronic address: aroseberry@gsu.edu.
authors.forename: Aaron G
authors.initials: AG
authors.lastname: Roseberry
authors.affiliation: Department of Biology, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States; Neuroscience Institute, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States.
authors.forename: Katherine
authors.initials: K
authors.lastname: Stuhrman
authors.affiliation: Department of Biology, Georgia State University, 24 Peachtree Center Avenue NE, Atlanta, GA 30303, United States.
authors.forename: Anna I
authors.initials: AI
authors.lastname: Dunigan
mesh_terms: D054369:Agouti-Related Protein / Q000378:metabolism / Q000494:pharmacology*; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004435:Eating / Q000187:drug effects / Q000235:genetics; D006801:Humans; D044101:Receptors, Melanocortin / Q000235:genetics / Q000378:metabolism*; D012201:Reward; D015398:Signal Transduction / Q000187:drug effects*; D000521:alpha-MSH / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D054369:Agouti-Related Protein; D044101:Receptors, Melanocortin; D000521:alpha-MSH; D004298:Dopamine
keywords: AgRP; Dopamine; Drug abuse; Feeding; MC3R; MC4R; Melanocortin; VTA; αMSH