Glial Fibrillary Acidic ProteinNeurogliaGlial Cell Line-Derived Neurotrophic Factor ReceptorsNeuronsAstrocytesNerve Growth FactorsNerve Tissue ProteinsRetinaBrainGlial Cell Line-Derived Neurotrophic FactorCentral Nervous SystemOligodendrogliaGliosisProto-Oncogene Proteins c-retImmunohistochemistryCells, CulturedGlial Cell Line-Derived Neurotrophic FactorsAxonsSchwann CellsCell DifferentiationNeurturinRats, Sprague-DawleyStem CellsEpendymoglial CellsAnimals, NewbornDrosophila ProteinsSpinal CordEnteric Nervous SystemOptic NerveCerebral CortexNestinMyelin SheathGliomaS100 ProteinsJC VirusS100 Calcium Binding Protein beta SubunitAmino Acid Transport System X-AGCell CountLeechesAquaporin 4CerebellumGene Expression Regulation, DevelopmentalGlutamic AcidIntermediate Filament ProteinsNerve RegenerationNervous SystemRNA, MessengerNeural Stem CellsCell LineageMice, TransgenicExcitatory Amino Acid Transporter 1EpendymaPeripheral Nervous SystemVimentinOptic Lobe, NonmammalianCell CommunicationDrosophilaDisease Models, AnimalIn Situ HybridizationNeuropeptidesGanglia, SpinalMice, Inbred C57BL