PMID- 24993299 OWN - NLM STAT- MEDLINE DCOM- 20150413 LR - 20191210 IS - 1872-7972 (Electronic) IS - 0304-3940 (Linking) VI - 578 DP - 2014 Aug 22 TI - Further evidence for the role of interferon-gamma on anxiety- and depressive-like behaviors: involvement of hippocampal neurogenesis and NGF production. PG - 100-5 LID - S0304-3940(14)00520-5 [pii] LID - 10.1016/j.neulet.2014.06.039 [doi] AB - A series of evidence suggests that interferon-gamma (IFN-gamma) plays an important role in central nervous system (CNS) functions. However, previous studies have obtained inconsistent results regarding the role of IFN-gamma in modulating emotion-related behaviors. The present study aimed to evaluate the behavioral profile of IFN-gamma knockout (K.O.) mice in models of anxiety and depression. Male C57Bl6 wild type (WT) or IFN-gamma K.O. mice were submitted to the following tests: contextual fear conditioning (CFC), elevated plus maze (EPM), open field (OF) and forced swimming test (FST). To explore the possible neurobiological mechanisms involved, we also assessed hippocampal neurogenesis by means of hippocampal doublecortin expression, and the levels of brain-derived neurothophic factor (BDNF) and nerve growth factor (NGF) in the hippocampus and prefrontal cortex. Our results suggested that IFN-gamma K.O. mice exhibited an anxiogenic profile in CFC, EPM and OF tests. In FST, the K.O. group spent more time immobile than the WT group. The number of doublecortin positive cells was reduced in the dentate gyrus, and the expression of NGF was down regulated in the prefrontal cortex of IFN-gamma K.O. mice. Our results suggest that IFN-gamma is involved in CNS plasticity, contributing to the modulation of anxiety and depressive states. CI - Copyright (c) 2014 Elsevier Ireland Ltd. All rights reserved. FAU - Campos, Alline C AU - Campos AC AD - Group of Neuroimmunology, Laboratory of Immunopharmacology, Institute of Biological Sciences and School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil; Infectious Diseases and Tropical Medicine Graduate Program, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. Electronic address: allinecampos@usp.br. FAU - Vaz, Gabriela N AU - Vaz GN AD - Group of Neuroimmunology, Laboratory of Immunopharmacology, Institute of Biological Sciences and School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil; Infectious Diseases and Tropical Medicine Graduate Program, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. FAU - Saito, Viviane M AU - Saito VM AD - Group of Neuroimmunology, Laboratory of Immunopharmacology, Institute of Biological Sciences and School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil. FAU - Teixeira, Antonio L AU - Teixeira AL AD - Group of Neuroimmunology, Laboratory of Immunopharmacology, Institute of Biological Sciences and School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil; Infectious Diseases and Tropical Medicine Graduate Program, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140701 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 82115-62-6 (Interferon-gamma) RN - 9061-61-4 (Nerve Growth Factor) SB - IM MH - Animals MH - Anxiety/*metabolism MH - Brain-Derived Neurotrophic Factor/metabolism MH - Conditioning, Psychological MH - Depression/*metabolism MH - Fear/physiology MH - Hippocampus/*metabolism MH - Interferon-gamma/genetics/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Nerve Growth Factor/*metabolism MH - *Neurogenesis MH - Prefrontal Cortex/metabolism OTO - NOTNLM OT - Anxiety OT - Depression OT - Hippocampal neurogenesis OT - Interferon-gamma OT - Nerve growth factor OT - Prefrontal cortex EDAT- 2014/07/06 06:00 MHDA- 2015/04/14 06:00 CRDT- 2014/07/05 06:00 PHST- 2014/02/04 00:00 [received] PHST- 2014/06/06 00:00 [revised] PHST- 2014/06/23 00:00 [accepted] PHST- 2014/07/05 06:00 [entrez] PHST- 2014/07/06 06:00 [pubmed] PHST- 2015/04/14 06:00 [medline] AID - S0304-3940(14)00520-5 [pii] AID - 10.1016/j.neulet.2014.06.039 [doi] PST - ppublish SO - Neurosci Lett. 2014 Aug 22;578:100-5. doi: 10.1016/j.neulet.2014.06.039. Epub 2014 Jul 1.