title: Attenuated transcriptional responses to oxidative stress in the aged rat brain.
abstract: The aged nervous system displays impaired cognitive functions, and these impairments are exacerbated in several neurodegenerative diseases. A role for oxidative stress has been suggested for several of these age-associated dysfunctions. In addition, recovery from more acute traumatic insults that also generate oxidative stress is impaired in the aged. Here we examine the response of aged rat hippocampi to normobaric hyperoxia treatments and demonstrate an attenuation in the DNA binding activity of the AP-1 and nuclear factor-kappa B transcription factors, which are important components of stress response signal transduction pathways and can determine shifts in cellular commitments to necrosis, apoptosis, or functional recovery in the central nervous system.
authors.affiliation: Department of Human Biological Chemistry and Genetics, The University of Texas Medical Branch at Galveston, Galveston, Texas 77555-0652, USA.
authors.forename: LiQi
authors.initials: L
authors.lastname: Tong
authors.forename: Tracy
authors.initials: T
authors.lastname: Toliver-Kinsky
authors.forename: Michael
authors.initials: M
authors.lastname: Edwards
authors.forename: David K
authors.initials: DK
authors.lastname: Rassin
authors.forename: Karin
authors.initials: K
authors.lastname: Werrbach-Perez
authors.forename: J Regino
authors.initials: JR
authors.lastname: Perez-Polo
mesh_terms: D000375:Aging / Q000378:metabolism* / Q000473:pathology; D000818:Animals; D001921:Brain / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D001927:Brain Diseases / Q000235:genetics / Q000378:metabolism* / Q000503:physiopathology; D019757:Carbon-Oxygen Lyases / Q000235:genetics / Q000378:metabolism; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D015536:Down-Regulation / Q000235:genetics*; D006624:Hippocampus / Q000378:metabolism / Q000503:physiopathology; D018496:Hyperoxia / Q000235:genetics; D016328:NF-kappa B / Q000235:genetics / Q000378:metabolism; D018384:Oxidative Stress / Q000502:physiology*; D010100:Oxygen / Q000633:toxicity; D016760:Proto-Oncogene Proteins c-fos / Q000235:genetics / Q000378:metabolism; D016755:Proto-Oncogene Proteins c-jun / Q000235:genetics / Q000378:metabolism; D051381:Rats; D011916:Rats, Inbred F344; D015398:Signal Transduction / Q000235:genetics; D018808:Transcription Factor AP-1 / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; D016328:NF-kappa B; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D019757:Carbon-Oxygen Lyases; C470319:Apex1 protein, rat; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase; D010100:Oxygen