PMID- 19236729 OWN - NLM STAT- MEDLINE DCOM- 20110906 LR - 20221207 IS - 1469-5111 (Electronic) IS - 1461-1457 (Linking) VI - 12 IP - 7 DP - 2009 Aug TI - Synergistic neurochemical and behavioural effects of acute intrahippocampal injection of brain-derived neurotrophic factor and antidepressants in adult mice. PG - 905-15 LID - 10.1017/S1461145709000017 [doi] AB - Preclinical data support the view that brain-derived neurotrophic factor (BDNF) and serotonergic systems regulate circuits involved in affective disorders. The present study examined neurochemical and behavioural consequences of an acute intrahippocampal injection of BDNF combined with an antidepressant by using in-vivo intracerebral microdialysis in the ventral hippocampus (vHi) in conscious mice and behavioural paradigms predictive of antidepressant and anxiolytic-like effects [the mouse forced swim test (FST), the open-field (OF) paradigm and the elevated plus maze (EPM)]. Neurochemical data revealed that BDNF (100 ng) potentiated the effects of the systemic administration of a serotonin selective reuptake inhibitor (SSRI; paroxetine 4 mg/kg i.p.) and that of a locally applied citalopram perfusion on dialysate 5-HT levels in the vHi. These neurochemical changes correlated with behavioural data since, in the FST, antidepressant-like activity of paroxetine as measured on swimming behaviour was potentiated by BDNF. These data suggest an interesting synergy between BDNF and SSRI on antidepressant-like activity. Furthermore, in both the OF and EPM paradigms BDNF induced an anxiogenic-like activity, whereas paroxetine prevented this effect. Finally, the neurochemical and behavioural effects of BDNF on the serotonergic system might occur at both pre- and post-synaptic levels since by using in-situ hybridization, we showed that TrkB-R mRNA was expressed in the hippocampus and the dorsal raphe nucleus in adult mice. Taken together the neurochemical and behavioural effects of BDNF suggest that these behavioural changes were mediated by increases in 5-HT neurotransmission in vHi. Thus a BDNF+SSRI combination may offer new alternatives to treat mood disorders. FAU - Deltheil, Thierry AU - Deltheil T AD - Universite Paris-Sud, EA 3544, Faculte de Pharmacie, Chatenay-Malabry, France. FAU - Tanaka, Kenji AU - Tanaka K FAU - Reperant, Christelle AU - Reperant C FAU - Hen, Rene AU - Hen R FAU - David, Denis J AU - David DJ FAU - Gardier, Alain M AU - Gardier AM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090223 PL - England TA - Int J Neuropsychopharmacol JT - The international journal of neuropsychopharmacology JID - 9815893 RN - 0 (Antidepressive Agents) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (RNA, Messenger) RN - 0 (Serotonin Uptake Inhibitors) RN - 0DHU5B8D6V (Citalopram) RN - 333DO1RDJY (Serotonin) RN - 41VRH5220H (Paroxetine) RN - EC 2.7.10.1 (Receptor, trkB) SB - IM MH - Analysis of Variance MH - Animals MH - Antidepressive Agents/*administration & dosage MH - Anxiety/chemically induced/metabolism/prevention & control/psychology MH - Behavior, Animal/*drug effects MH - Brain-Derived Neurotrophic Factor/*administration & dosage/toxicity MH - Citalopram/*administration & dosage MH - Depression/*drug therapy/metabolism/physiopathology/psychology MH - Disease Models, Animal MH - Drug Synergism MH - Hippocampus/*drug effects/metabolism/physiopathology MH - In Situ Hybridization MH - Male MH - Mice MH - Microdialysis MH - Microinjections MH - Motor Activity/drug effects MH - Paroxetine/*administration & dosage MH - RNA, Messenger/metabolism MH - Receptor, trkB/drug effects/genetics MH - Serotonin/metabolism MH - Selective Serotonin Reuptake Inhibitors/*administration & dosage MH - Time Factors EDAT- 2009/02/25 09:00 MHDA- 2011/09/07 06:00 CRDT- 2009/02/25 09:00 PHST- 2009/02/25 09:00 [entrez] PHST- 2009/02/25 09:00 [pubmed] PHST- 2011/09/07 06:00 [medline] AID - S1461145709000017 [pii] AID - 10.1017/S1461145709000017 [doi] PST - ppublish SO - Int J Neuropsychopharmacol. 2009 Aug;12(7):905-15. doi: 10.1017/S1461145709000017. Epub 2009 Feb 23.