title: Early decrease of redox factor-1 in spinal motor neurons of presymptomatic transgenic mice with a mutant SOD1 gene.
abstract: Oxidative stress has been proposed to play a pivotal role in pathogenesis of both sporadic and familial amyotrophic lateral sclerosis (ALS). Expression of DNA repair enzyme redox factor-1 (Ref-1) protein was examined in the spinal cord of transgenic mice with an ALS-linked mutant Cu/Zn superoxide dismutase (SOD1) gene. Immunoblotting and immunocytochemical analyses showed that the most spinal motor neurons lost the immunoreactivity for Ref-1 in the early presymptomatic stage that preceded significant loss of the neurons. The present result suggests that an early impairment of DNA repair in the spinal motor neurons may account for the mutant SOD1-mediated motor neuronal death in this model.
authors.affiliation: Department of Neurology, Graduate School of Medicine and Dentistry, Okayama University, 2-5-1 Shikata-cho, Okayama 700-8558, Japan. manabe@cc.okayama-u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Manabe
authors.forename: H
authors.initials: H
authors.lastname: Warita
authors.forename: T
authors.initials: T
authors.lastname: Murakami
authors.forename: M
authors.initials: M
authors.lastname: Shiote
authors.forename: T
authors.initials: T
authors.lastname: Hayashi
authors.forename: I
authors.initials: I
authors.lastname: Nagano
authors.forename: M
authors.initials: M
authors.lastname: Shoji
authors.forename: K
authors.initials: K
authors.lastname: Abe
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000201:enzymology* / Q000235:genetics* / Q000473:pathology; D000818:Animals; D019757:Carbon-Oxygen Lyases / Q000235:genetics* / Q000378:metabolism; D016923:Cell Death / Q000235:genetics; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase; D004195:Disease Models, Animal; D015536:Down-Regulation / Q000235:genetics*; D007150:Immunohistochemistry; D051379:Mice; D008822:Mice, Transgenic / Q000235:genetics / Q000378:metabolism; D009046:Motor Neurons / Q000201:enzymology* / Q000473:pathology; D009154:Mutation / Q000502:physiology; D018384:Oxidative Stress / Q000235:genetics; D013116:Spinal Cord / Q000201:enzymology* / Q000473:pathology; D013482:Superoxide Dismutase / Q000235:genetics* / Q000378:metabolism; D000072105:Superoxide Dismutase-1
chemical_list: C000606291:Sod1 protein, mouse; D013482:Superoxide Dismutase; D000072105:Superoxide Dismutase-1; D019757:Carbon-Oxygen Lyases; C486216:Apex1 protein, mouse; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase