PMID- 30890202 OWN - NLM STAT- MEDLINE DCOM- 20200114 LR - 20211204 IS - 1601-5215 (Electronic) IS - 0924-2708 (Linking) VI - 31 IP - 3 DP - 2019 Jun TI - Prelimbic neuronal nitric oxide synthase inhibition exerts antidepressant-like effects independently of BDNF signalling cascades. PG - 143-150 LID - 10.1017/neu.2018.39 [doi] AB - OBJECTIVES: NMDA antagonists and nitric oxide synthase (NOS) inhibitors induce antidepressant-like effects and may represent treatment options for depression. The behavioural effects of NMDA antagonists seem to depend on Tyrosine kinase B receptor (TrkB) activation by BDNF and on mechanistic target of rapamycin (mTOR), in the medial prefrontal cortex (mPFC). However, it is unknown whether similar mechanisms are involved in the behavioural effects of NOS inhibitors. Therefore, this work aimed at determining the role of TrkB and mTOR signalling in the prelimbic area of the ventral mPFC (vmPFC-PL) in the antidepressant-like effect of NOS inhibitors. METHODS: Pharmacological treatment with LY235959 or ketamine (NMDA antagonists), NPA or 7-NI (NOS inhibitors), BDNF, K252a (Trk antagonist) and rapamycin (mTOR inhibitor) injected systemically or into vmPFC-PL followed by behavioural assessment. RESULTS: We found that bilateral injection of BDNF into the vmPFC-PL induced an antidepressant-like effect, which was blocked by pretreatment with K252a and rapamycin. Microinjection of LY 235959 into the vmPFC-PL induced antidepressant-like effect that was suppressed by local rapamycin but not by K252a pretreatment. Microinjection of NPA induced an antidepressant-like effect insensitive to both K252a and rapamycin. Similarly, the antidepressant-like effects of a systemic injection of ketamine or 7-NI were not affected by blockade of mTOR or Trk receptors in the vmPFC-PL. CONCLUSION: Our data support the hypothesis that NMDA blockade induces an antidepressant-like effect that requires mTOR but not Trk signalling into the vmPFC-PL. The antidepressant-like effect induced by local NOS inhibition is independent on both Trk and mTOR signalling in the vmPFC-PL. FAU - Pereira, Vitor Silva AU - Pereira VS AUID- ORCID: 0000-0002-9051-3154 AD - 1Translational Neuropsychiatry Unit,Department of Clinical Medicine,Aarhus University,8240 Risskov,Denmark. FAU - Suavinha, Angelica C D Romano AU - Suavinha ACDR AD - 3Department of Physics and Chemistry,School of Pharmaceutical Sciences of Ribeirao Preto,Campus USP-Ribeirao Preto,Ribeirao Preto,SP 14040-904,Brazil. FAU - Wegener, Gregers AU - Wegener G AD - 1Translational Neuropsychiatry Unit,Department of Clinical Medicine,Aarhus University,8240 Risskov,Denmark. FAU - Joca, Samia R L AU - Joca SRL AD - 1Translational Neuropsychiatry Unit,Department of Clinical Medicine,Aarhus University,8240 Risskov,Denmark. LA - eng PT - Journal Article DEP - 20190320 PL - England TA - Acta Neuropsychiatr JT - Acta neuropsychiatrica JID - 9612501 RN - 0 (10,11-dihydroxy-N-n-propylnorapomorphine) RN - 0 (Antidepressive Agents) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Carbazoles) RN - 0 (Indazoles) RN - 0 (Indole Alkaloids) RN - 0 (Isoquinolines) RN - 690G0D6V8H (Ketamine) RN - 97161-97-2 (staurosporine aglycone) RN - AR2BHC0C6P (LY 235959) RN - E524N2IXA3 (Ornithine) RN - EC 1.14.13.39 (NOS1 protein, human) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type I) RN - EC 2.7.1.1 (mTOR protein, rat) RN - EC 2.7.10.1 (Ntrk2 protein, rat) RN - EC 2.7.10.1 (Receptor, trkB) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - N21FAR7B4S (Apomorphine) RN - UX0N37CMVH (7-nitroindazole) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Animals MH - Antidepressive Agents/administration & dosage/*pharmacology MH - Apomorphine/administration & dosage/analogs & derivatives/pharmacology MH - Brain-Derived Neurotrophic Factor/administration & dosage/*pharmacology MH - Carbazoles/administration & dosage/pharmacology MH - Immobility Response, Tonic/drug effects MH - Indazoles/administration & dosage/pharmacology MH - Indole Alkaloids/administration & dosage/pharmacology MH - Isoquinolines/administration & dosage/pharmacology MH - Ketamine/administration & dosage/pharmacology MH - Locomotion/drug effects MH - Male MH - Microinjections MH - Nitric Oxide Synthase Type I/*antagonists & inhibitors MH - Ornithine/administration & dosage/pharmacology MH - Prefrontal Cortex/drug effects/metabolism MH - Rats MH - Receptor, trkB/antagonists & inhibitors/biosynthesis MH - Signal Transduction/*drug effects MH - Sirolimus/administration & dosage/pharmacology MH - TOR Serine-Threonine Kinases/antagonists & inhibitors/biosynthesis OTO - NOTNLM OT - N-methyl-D-aspartate receptors OT - nitric oxide synthase EDAT- 2019/03/21 06:00 MHDA- 2020/01/15 06:00 CRDT- 2019/03/21 06:00 PHST- 2019/03/21 06:00 [pubmed] PHST- 2020/01/15 06:00 [medline] PHST- 2019/03/21 06:00 [entrez] AID - S092427081800039X [pii] AID - 10.1017/neu.2018.39 [doi] PST - ppublish SO - Acta Neuropsychiatr. 2019 Jun;31(3):143-150. doi: 10.1017/neu.2018.39. Epub 2019 Mar 20.