title: Immuno-characterization of the switch of peptide elongation factors eEF1A-1/EF-1alpha and eEF1A-2/S1 in the central nervous system during mouse development.
abstract: During early postnatal development, a switch occurs between eEF1A-1/EF-1alpha and eEF1A-2/S1, homologous peptide elongation factors, in brain, heart, and skeletal muscle; eEF1A-2/S1 becomes the major form expressed in maturity. By immunofluorescent labeling, we detected both homologues in the developing brains of wild-type and wasted mutant mice, carrying a deletion in the eEF1A-2/S1 gene; we found that brain expression of eEF1A-2/S1 protein is restricted to mature, terminally differentiated neurons, and coincides with the disappearance of eEF1A-1/EF-1alpha 20 days after birth. Furthermore, no elongation factor 1A is present in wasted mutant mice neurons following the developmental switch, indicating that the genetic regulation silencing eEF1A-1/EF-1alpha is still functional.
authors.affiliation: Bloomfield Center for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis Jewish General Hospital and Department of Medicine, McGill University, Montréal, Canada.
authors.forename: Jie
authors.initials: J
authors.lastname: Pan
authors.forename: Louis-Bruno
authors.initials: LB
authors.lastname: Ruest
authors.forename: Suying
authors.initials: S
authors.lastname: Xu
authors.forename: Eugenia
authors.initials: E
authors.lastname: Wang
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002490:Central Nervous System / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism*; D004622:Embryo, Mammalian; D005455:Fluorescent Antibody Technique / Q000379:methods; D018507:Gene Expression Regulation, Developmental; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D006579:Heterozygote; D051379:Mice; D008810:Mice, Inbred C57BL; D008817:Mice, Mutant Strains; D018613:Microscopy, Confocal / Q000379:methods; D009154:Mutation; D016900:Neurofilament Proteins / Q000378:metabolism; D009474:Neurons / Q000378:metabolism; D020648:Peptide Elongation Factor 1 / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000096:biosynthesis; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods
chemical_list: C503235:Eef1a2 protein, mouse; D005904:Glial Fibrillary Acidic Protein; D016900:Neurofilament Proteins; D020648:Peptide Elongation Factor 1; D012333:RNA, Messenger; C066858:neurofilament protein NF 68