PMID- 20184922 OWN - NLM STAT- MEDLINE DCOM- 20100810 LR - 20191210 IS - 1872-7549 (Electronic) IS - 0166-4328 (Linking) VI - 210 IP - 2 DP - 2010 Jul 11 TI - The role of the estrogen receptor alpha in the medial amygdala and ventromedial nucleus of the hypothalamus in social recognition, anxiety and aggression. PG - 211-20 LID - 10.1016/j.bbr.2010.02.033 [doi] AB - Social recognition manifests itself in decreased investigation of a previously encountered individual. Estrogen receptor alpha (ERalpha) knock out mice show deficient social recognition and anxiety. These data show that the ERalpha is involved in these effects, but they do not say anything about the brain sites important for these effects. In this study, an shRNA encoded within an AAV viral vector directed against the ERalpha receptor gene (or containing luciferase control), was injected bilaterally into the posterodorsal amygdala (MePDA) or the ventromedial nucleus of the hypothalamus (VMN) of female rats. An 81% reduction of ERalpha expression in the MePDA eliminated social recognition. Moreover, this diminution of ERalpha in the MePDA reduced anxiety in the light/dark choice test. In contrast, social recognition was unaffected after ERalpha knockdown in the VMN while aggressiveness against the juvenile was enhanced. In conclusion, social recognition and anxiety in female rats are modulated by the ERalpha in the amygdala. Moreover, aggression against juveniles but not against adults could, at least partly, depend on the ERalpha in the VMN. CI - Copyright 2010 Elsevier B.V. All rights reserved. FAU - Spiteri, Thierry AU - Spiteri T AD - Department of Psychology, University of Tromso, Tromso, Norway. FAU - Musatov, Sergei AU - Musatov S FAU - Ogawa, Sonoko AU - Ogawa S FAU - Ribeiro, Ana AU - Ribeiro A FAU - Pfaff, Donald W AU - Pfaff DW FAU - Agmo, Anders AU - Agmo A LA - eng GR - HD 05751/HD/NICHD NIH HHS/United States GR - MH 38273/MH/NIMH NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20100223 PL - Netherlands TA - Behav Brain Res JT - Behavioural brain research JID - 8004872 RN - 0 (Estrogen Receptor alpha) SB - IM MH - Age Factors MH - Aggression/*physiology MH - Amygdala/*metabolism MH - Animals MH - *Anxiety/genetics/pathology/physiopathology MH - Choice Behavior/physiology MH - Estrogen Receptor alpha/genetics/*metabolism MH - Female MH - Genetic Vectors/physiology MH - Male MH - Neuropsychological Tests MH - Ovariectomy MH - RNA Interference/physiology MH - Rats MH - Recognition, Psychology/*physiology MH - *Social Behavior MH - Transduction, Genetic/methods MH - Ventromedial Hypothalamic Nucleus/*metabolism EDAT- 2010/02/27 06:00 MHDA- 2010/08/11 06:00 CRDT- 2010/02/27 06:00 PHST- 2010/01/11 00:00 [received] PHST- 2010/02/16 00:00 [revised] PHST- 2010/02/17 00:00 [accepted] PHST- 2010/02/27 06:00 [entrez] PHST- 2010/02/27 06:00 [pubmed] PHST- 2010/08/11 06:00 [medline] AID - S0166-4328(10)00146-4 [pii] AID - 10.1016/j.bbr.2010.02.033 [doi] PST - ppublish SO - Behav Brain Res. 2010 Jul 11;210(2):211-20. doi: 10.1016/j.bbr.2010.02.033. Epub 2010 Feb 23.