PMID- 15146951 OWN - NLM STAT- MEDLINE DCOM- 20040719 LR - 20131121 IS - 1295-0661 (Print) IS - 1295-0661 (Linking) VI - 198 IP - 1 DP - 2004 TI - [Genetic models to understand how serotonin acts during development]. PG - 18-21 AB - Molecular genetics in mice have allowed significant progresses to be made in our understanding of the development of serotoninergic neurones and of their developmental role. The serotoninergic phenotype is determined by a sequence of transcription factors. Pet-1 is selectively expressed in the raphe and controls directly the transcription of the genes, encoding the biosynthetic enzyme of 5-HT, tryptophan hydroxylase (TPH), and the serotonin plasma membrane transporter (SERT). Expression of SERT can however occur independently of TPH during development and allows subpopulations of glutamatergic neurons to take up and to store 5-HT into synaptic vesicles via the vesicular monoamine transporter (VMAT). This could allow a tight homeostasis of 5-HT receptor activation on thalamic and retinal afferents. Mice with an excess or a severe reduction of 5-HT during development, such as the MAOA and the VMAT2 KO mice, show abnormalities that concern late stages of development: alterations in axon branching, dendritic remodeling and developmental cell death. Each of these effects could be mediated by a different 5-HT receptor. Abnormalities have been best characterized in the somatosensory and visual system but are likely to occur throughout the central nervous system. FAU - Gaspar, Patricia AU - Gaspar P AD - INSERM Unite 106, Batiment Pediatrie, Hopital de la Salpetriere, 47, boulevard de l'Hopital, 75651 Paris 13. gaspar@infobiogen.fr LA - fre PT - English Abstract PT - Journal Article PT - Review TT - Des modeles genetiques pour comprendre le role de la serotonine au cours du developpement. PL - France TA - J Soc Biol JT - Journal de la Societe de biologie JID - 100890617 RN - 0 (Carrier Proteins) RN - 0 (Fev protein, mouse) RN - 0 (Membrane Glycoproteins) RN - 0 (Membrane Transport Proteins) RN - 0 (Nerve Tissue Proteins) RN - 0 (Receptors, Serotonin) RN - 0 (Serotonin Plasma Membrane Transport Proteins) RN - 0 (Slc6a4 protein, mouse) RN - 0 (Transcription Factors) RN - 333DO1RDJY (Serotonin) RN - EC 1.14.16.4 (Tryptophan Hydroxylase) SB - IM MH - Animals MH - Carrier Proteins/biosynthesis/genetics MH - Enzyme Induction MH - *Gene Expression Regulation, Developmental MH - Homeostasis MH - Membrane Glycoproteins/biosynthesis/genetics MH - *Membrane Transport Proteins MH - Mice MH - Mice, Knockout MH - *Models, Genetic MH - Nerve Tissue Proteins/biosynthesis/genetics MH - Nervous System/embryology MH - Nervous System Malformations/embryology/genetics MH - Neurons/classification/*metabolism MH - Phenotype MH - Receptors, Serotonin/genetics/physiology MH - Serotonin/deficiency/*physiology MH - Serotonin Plasma Membrane Transport Proteins MH - Transcription Factors/physiology MH - Tryptophan Hydroxylase/biosynthesis/genetics RF - 22 EDAT- 2004/05/19 05:00 MHDA- 2004/07/20 05:00 CRDT- 2004/05/19 05:00 PHST- 2004/05/19 05:00 [pubmed] PHST- 2004/07/20 05:00 [medline] PHST- 2004/05/19 05:00 [entrez] PST - ppublish SO - J Soc Biol. 2004;198(1):18-21.