title: The Roles of Dopamine D2 Receptor in the Social Hierarchy of Rodents and Primates.
abstract: Dopamine (DA) plays significant roles in regulation of social behavior. In social groups of humans and other animals, social hierarchy exists, which is determined by several behavioral characteristics such as aggression and impulsivity as well as social affiliations. In this study, we investigated the effects of pharmacological blockade of DA D2 receptor on social hierarchy of Japanese macaque and mouse social groups. We found acute administration of the D2 antagonist, sulpiride, in socially housed Japanese macaques attenuated social dominance when the drug was given to high social class macaques. A similar attenuation of social dominance was observed in high social class mice with D2 antagonist administration. In contrast, D2 antagonist administration in low social class macaque resulted in more stable social hierarchy of the group, whereas such effect was not observed in mouse social group. These results suggest that D2 receptor signaling may play important roles in establishment and maintenance of social hierarchy in social groups of several species of animals.
authors.affiliation: Kyoto University, Primate Research Institute, Inuyama, Aichi, 484-8506, Japan.
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Yamaguchi
authors.affiliation: Catholic University of Daegu, Department of Food Science &Nutrition, Gyeongsan, Gyeonbuk, 34830, South Korea.
authors.forename: Young-A
authors.initials: YA
authors.lastname: Lee
authors.affiliation: Kyoto University, Primate Research Institute, Inuyama, Aichi, 484-8506, Japan.
authors.forename: Akemi
authors.initials: A
authors.lastname: Kato
authors.affiliation: Utrecht University, Graduate School of Natural Sciences, Princetonplein 5, 3584 CC, Utrecht, Netherland.
authors.forename: Emanuel
authors.initials: E
authors.lastname: Jas
authors.affiliation: Kyoto University, Primate Research Institute, Inuyama, Aichi, 484-8506, Japan.
authors.forename: Yukiori
authors.initials: Y
authors.lastname: Goto
mesh_terms: D000818:Animals; D018492:Dopamine Antagonists / Q000008:administration & dosage; D006608:Hierarchy, Social; D008251:Macaca; D051379:Mice; D017448:Receptors, Dopamine D2 / Q000378:metabolism*; D015398:Signal Transduction; D012919:Social Behavior; D013469:Sulpiride / Q000008:administration & dosage
chemical_list: D018492:Dopamine Antagonists; D017448:Receptors, Dopamine D2; D013469:Sulpiride