title: [Effects of electromagnetic radiation on RAF/MEK/ERK signaling pathway in rats hippocampus].
abstract: OBJECTIVE
  To study the development of changes for signaling molecules related to Raf/MEK/ERK pathway in hippocampus of rats after electromagnetic radiation, and investigate the mechanisms of radiation injury.
  
  
  METHODS
  Rats were exposed to X-HPM, S-HPM and EMP radiation source respectively, and animal model of electromagnetic radiation was established. Western blot was used to detect the expression of Raf-1, phosphorylated Raf-1 and phospholylated ERK.
  
  
  RESULTS
  The expression of Raf-1 down-regulated during 6 h-14 d after radiation, most significantly at 7 d, and recovered at 28 d. There was no significant difference between the radiation groups. The expression of phosphorylated Raf-1 and phosphorylated ERK both up-regulated at 6 h and 7 d after radiation, more significantly at 6 h, and the two microwave groups were more serious for phosphorylated ERK. During 6 h-14 d after S-HPM radiation, the expression of phosphorylated Raf-1 increased continuously, but phosphorylated ERK changed wavily, 6 h and 7 d were expression peak.
  
  
  CONCLUSIONS
  Raf/MEK/ERK signaling pathway participates in the hippocampus injury induced by electromagnetic radiation. The excessive activation of ERK pathway may result in the apoptosis and death of neurons, which is the important mechanism of recognition disfunction caused by electromagnetic radiation.
authors.affiliation: Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China.
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Zuo
authors.forename: De-wen
authors.initials: DW
authors.lastname: Wang
authors.forename: Rui-yun
authors.initials: RY
authors.lastname: Peng
authors.forename: Shui-ming
authors.initials: SM
authors.lastname: Wang
authors.forename: Ya-bing
authors.initials: YB
authors.lastname: Gao
authors.forename: Xin-ping
authors.initials: XP
authors.lastname: Xu
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Ma
mesh_terms: D000818:Animals; D017209:Apoptosis; D060733:Electromagnetic Radiation; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D006624:Hippocampus / Q000378:metabolism / Q000503:physiopathology / Q000528:radiation effects*; D020930:MAP Kinase Kinase Kinases / Q000378:metabolism*; D020935:MAP Kinase Signaling System / Q000528:radiation effects*; D008297:Male; D010766:Phosphorylation; D019908:Proto-Oncogene Proteins c-raf / Q000378:metabolism*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar
chemical_list: D019908:Proto-Oncogene Proteins c-raf; D048049:Extracellular Signal-Regulated MAP Kinases; D020930:MAP Kinase Kinase Kinases