PMID- 16579976 OWN - NLM STAT- MEDLINE DCOM- 20060810 LR - 20200319 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 1085 IP - 1 DP - 2006 Apr 26 TI - Somato-dendritic distribution of 5-HT(1A) and 5-HT(1B) autoreceptors in the BDNF- and cAMP-differentiated RN46A serotoninergic raphe cell line. PG - 121-6 AB - The rapid differentiating effects of brain-derived neurotrophic factor (BDNF) or dibutyryl-cAMP (dBcAMP) were characterized on RN46A, a rat raphe-derived neuronal cell line. After BDNF treatment, RN46A cells were serotonin-immunopositive and bipolar, and expressed the microtubule-associated-protein 2 (Map2). After dBcAMP treatment, the cells often became multipolar, bearing very long processes strongly immunopositive for serotonin and Map2. Under both conditions, the expression and distribution of 5-HT(1A) and 5-HT(1B) autoreceptors remained identical. 5-HT(1A) and Map2 immunolabelings were superimposable, as expected of their somato-dendritic targeting. Surprisingly, the distribution of 5-HT(1B) immunoreactivity was similar, in contrast with its usual localization in axons and nerve terminals in the brain. In conclusion, both BDNF and cAMP-differentiated RN46A cells towards a neuronal serotoninergic-like phenotype without the typical differential targeting of the 5-HT(1) autoreceptors, an interesting model to study the molecular mechanisms ensuing the targeting of 5-HT(1) autoreceptors to somas and dendrites. FAU - Rumajogee, Prakasham AU - Rumajogee P AD - Laboratoire de Neurobiologie des Signaux Intercellulaires, CNRS UMR 7101, Universite Pierre et Marie Curie, 75005 Paris, France. FAU - Verge, Daniel AU - Verge D FAU - Hamon, Michel AU - Hamon M FAU - Miquel, Marie-Christine AU - Miquel MC LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060331 PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (MAP2 protein, rat) RN - 0 (Microtubule-Associated Proteins) RN - 0 (Receptor, Serotonin, 5-HT1B) RN - 112692-38-3 (Receptor, Serotonin, 5-HT1A) RN - 333DO1RDJY (Serotonin) RN - E0399OZS9N (Cyclic AMP) SB - IM MH - Animals MH - Brain-Derived Neurotrophic Factor/*pharmacology MH - Cell Differentiation/*drug effects MH - Cell Line MH - Cyclic AMP/*pharmacology MH - Dendrites/metabolism MH - Immunohistochemistry/methods MH - Microtubule-Associated Proteins/metabolism MH - Neurons/*cytology/drug effects MH - Raphe Nuclei/*cytology MH - Rats MH - Receptor, Serotonin, 5-HT1A/*metabolism MH - Receptor, Serotonin, 5-HT1B/*metabolism MH - Serotonin/*metabolism/pharmacology EDAT- 2006/04/04 09:00 MHDA- 2006/08/11 09:00 CRDT- 2006/04/04 09:00 PHST- 2005/09/06 00:00 [received] PHST- 2006/02/21 00:00 [revised] PHST- 2006/02/22 00:00 [accepted] PHST- 2006/04/04 09:00 [pubmed] PHST- 2006/08/11 09:00 [medline] PHST- 2006/04/04 09:00 [entrez] AID - S0006-8993(06)00521-X [pii] AID - 10.1016/j.brainres.2006.02.086 [doi] PST - ppublish SO - Brain Res. 2006 Apr 26;1085(1):121-6. doi: 10.1016/j.brainres.2006.02.086. Epub 2006 Mar 31.