Dynamic roles of FGF-2 and Anosmin-1 in the migration of neuronal precursors from the subventricular zone during pre- and postnatal development.
FGF-2 and Anosmin-1 are diffusible proteins which act in cell proliferation and/or migration during CNS development. We describe their developmental expression patterns in the subventricular zone (SVZ) of the forebrain and the neuronal precursors (NPs) that migrate from this neurogenic site towards the olfactory bulb, forming the rostral migratory stream (RMS). The analysis is carried out before (E14), during (E17, P5) and after (P15) the peaks of migration along the RMS and before this acquires its mature conformation. At all these stages, FGF-2 exerts a FGFR1-mediated motogenic effect on NPs and induces the proliferation of SVZ astrocytes (putatively type B cells from triads), and Anosmin-1 works as a typical chemotropic agent for the NPs (mediated by FGFR1 at P5-P15). Altogether, our results are consistent with the notion that FGF-2 increases cell proliferation in the SVZ and would be the motogenic cue which feeds the migration of the newly produced NPs once generated, from early development (E14) and at least until P15, while Anosmin-1 cooperates in this migration attracting the NPs. In this sense, both cues should be considered as two of the first to be chronologically identified as actors in the formation of the RMS.
García-González
Diego
D
Grupo de Neurobiología del Desarrollo-GNDe, Unidad de Neurología Experimental, Hospital Nacional de Parapléjicos, Finca La Peraleda s/n, E-45071-Toledo, Spain.
Clemente
Diego
D
Coelho
Maria
M
Esteban
Pedro F
PF
Soussi-Yanicostas
Nadia
N
de Castro
Fernando
F
D000818:Animals; D000831:Animals, Newborn; D002465:Cell Movement / Q000187:drug effects / Q000502:physiology*; D049109:Cell Proliferation; D002478:Cells, Cultured; D002552:Cerebral Ventricles / Q000166:cytology / Q000201:enzymology / Q000254:growth & development; D002633:Chemotaxis / Q000187:drug effects / Q000502:physiology; D018920:Coculture Techniques / Q000379:methods; D004622:Embryo, Mammalian; D004791:Enzyme Inhibitors / Q000494:pharmacology; D016222:Fibroblast Growth Factor 2 / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects / Q000502:physiology*; D009363:Neoplasm Proteins; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D039842:Neural Cell Adhesion Molecule L1 / Q000378:metabolism; D009474:Neurons / Q000502:physiology*; D009924:Organ Culture Techniques; D051381:Rats; D017208:Rats, Wistar; D051496:Receptor, Fibroblast Growth Factor, Type 1 / Q000378:metabolism; D012794:Sialic Acids / Q000378:metabolism; D013234:Stem Cells / Q000187:drug effects / Q000502:physiology*; D014162:Transfection / Q000379:methods; D014404:Tubulin / Q000378:metabolism
D004791:Enzyme Inhibitors; D009363:Neoplasm Proteins; D009419:Nerve Tissue Proteins; D039842:Neural Cell Adhesion Molecule L1; D012794:Sialic Acids; D014404:Tubulin; C103469:polysialyl neural cell adhesion molecule; D016222:Fibroblast Growth Factor 2; C068304:Wfdc18 protein, rat; C496350:Fgfr1 protein, rat; D051496:Receptor, Fibroblast Growth Factor, Type 1