title: Expression of glutamate transporters in the medial and lateral vestibular nuclei during rat postnatal development.
abstract: The postnatal developmental expression and the distribution of the glutamate transporters (GLAST, GLT-1 and EAAC1) were analyzed in rat vestibular nuclei (VN), at birth and during the following 4 weeks. Analyses were performed using reverse transcriptase-polymerase chain reaction and immunoblotting of GLAST, GLT-1 and EAAC1 mRNA and protein during the postnatal development of the VN neurons and their afferent connections. We also studied the distribution of each glutamate transporter in the medial and lateral VN by use of immunocytochemistry and confocal microscopy. GLAST, GLT-1 and EAAC1 mRNA and protein were present in the VN at each developmental stage. GLAST was highly expressed mainly in glia from birth to the adult stage, its distribution pattern was heterogeneous depending on the region of the medial and lateral VN. GLT-1 expression increased dramatically during the second and third postnatal weeks. At least during the first postnatal week, GLT-1 was expressed in the soma of neurons. EAAC1 was detected in neurons and decreased from the third week. These temporal and regional patterns of GLAST, GLT-1 and EAAC1 suggest that they play different roles in the maturation of glutamatergic synaptic transmission in the medial and lateral VN during postnatal development.
authors: INSERM U432, Université Montpellier-II, CC 089, Place Eugène Bataillon, FR-34095 Montpellier Cedex 5, France. gdevau@univ-montp2.fr
authors: Gina
authors: G
authors: Devau
authors: Céline
authors: C
authors: Plachez
authors: Julien
authors: J
authors: Puyal
authors: Nathalie
authors: N
authors: Pierrot
authors: Stéphanie
authors: S
authors: Ventéo
authors: Jacqueline
authors: J
authors: Raymond
mesh_terms: D027322:Amino Acid Transport System X-AG / Q000096:biosynthesis*; D000818:Animals; D001692:Biological Transport / Q000502:physiology; D015153:Blotting, Western; D027341:Excitatory Amino Acid Transporter 1; D027342:Excitatory Amino Acid Transporter 2 / Q000096:biosynthesis; D050580:Excitatory Amino Acid Transporter 3; D050491:Glutamate Plasma Membrane Transport Proteins; D007150:Immunohistochemistry; D018613:Microscopy, Confocal; D009457:Neuroglia / Q000378:metabolism; D009474:Neurons / Q000378:metabolism*; D012333:RNA, Messenger; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction; D027981:Symporters / Q000096:biosynthesis; D014726:Vestibular Nuclei / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D027322:Amino Acid Transport System X-AG; D027341:Excitatory Amino Acid Transporter 1; D027342:Excitatory Amino Acid Transporter 2; D050580:Excitatory Amino Acid Transporter 3; D050491:Glutamate Plasma Membrane Transport Proteins; D012333:RNA, Messenger; C493398:Slc1a1 protein, rat; C493392:Slc1a3 protein, rat; D027981:Symporters