title: Regional and temporal changes in proteomic profile after middle cerebral artery occlusion with or without reperfusion in rats.
abstract: Although DNA microarray studies showed up-regulation of various genes, failures of translation of many genes are expected to occur under ischemic conditions even in the penumbra with mild reduction in cerebral blood flow. We applied surface enhanced laser desorption/ionization-time of flight mass spectrometry (SELDI-TOF-MS) technology to study proteomic profile at 6, 12, and 24 h after photothrombotic middle cerebral artery (MCA) occlusion with or without YAG laser-induced reperfusion in adult male spontaneously hypertensive rats. Of the 43 protein peaks that differed from the sham-operation group with a criterion (no overlap of peak intensities between the two groups), 36 peaks (84%) were down-regulated, and seven were up-regulated. All increased peaks showed greater than twofold increases (up to 8.1 fold) compared with those in the sham-operation group. Effects of reperfusion were observed mainly at 24 h after 1 h of MCA occlusion only in the penumbra, where 23 of 32 peaks returned toward the control values, whereas none of 33 peaks showed such attenuation in the ischemic core. Major ischemia-induced changes in protein peaks detected with SELDI-TOF-MS were down-regulations. The present study showed that dynamic changes of protein profile were associated with progression and recovery of the ischemic core and penumbra.
authors.affiliation: Center for Emotional and Behavioral Disorders, Hizen Psychiatric Center, Yoshinogari, Kanzaki, Saga, Japan. hyao@hizen2.hosp.go.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yao
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Nakahara
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Nakagawa
authors.forename: Kijiro
authors.initials: K
authors.lastname: Hashimoto
authors.forename: Toshihide
authors.initials: T
authors.lastname: Kuroki
mesh_terms: D000818:Animals; D001921:Brain / Q000098:blood supply*; D020244:Infarction, Middle Cerebral Artery / Q000378:metabolism* / Q000503:physiopathology; D002546:Ischemic Attack, Transient / Q000378:metabolism* / Q000503:physiopathology; D008297:Male; D040081:Protein Array Analysis; D020543:Proteome / Q000378:metabolism*; D051381:Rats; D011918:Rats, Inbred SHR; D015424:Reperfusion; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D020543:Proteome