title: Immediately transcripted genes in various hepatic ischemia models.
abstract: OBJECTIVE
  To elucidate the characteristic gene transcription profiles among various hepatic ischemia conditions, immediately transcribed genes and the degree of ischemic injury were compared among total ischemia (TI), intermittent clamping (IC), and ischemic preconditioning (IPC).
  
  
  METHODS
  Sprague-Dawley rats were equally divided into control (C, sham-operated), TI (ischemia for 90 minutes), IC (ischemia for 15 minutes and reperfusion for 5 minutes, repeated six times), and IPC (ischemia for 15 minutes, reperfusion for 5 minutes, and ischemia again for 90 minutes) groups. A cDNA microarray analysis was performed using hepatic tissues obtained by partial hepatectomy after occluding hepatic inflow.
  
  
  RESULTS
  THE CDNA MICROARRAY REVEALED THE FOLLOWING: interleukin (IL)-1β expression was 2-fold greater in the TI group than in the C group. In the IC group, IL-1α/β expression increased by 2.5-fold, and Na+/K+ ATPase β1 expression decreased by 2.4-fold. In the IPC group, interferon regulatory factor-1, osteoprotegerin, and retinoblastoma-1 expression increased by approximately 2-fold compared to that in the C group, but the expression of Na+/K+ ATPase β1 decreased 3-fold.
  
  
  CONCLUSIONS
  The current findings revealed characteristic gene expression profiles under various ischemic conditions. However, additional studies are needed to clarify the mechanism of protection against IPC.
authors.affiliation: Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Kang Kook
authors.initials: KK
authors.lastname: Choi
authors.forename: Jin A
authors.initials: JA
authors.lastname: Cho
authors.forename: Se Hoon
authors.initials: SH
authors.lastname: Kim
authors.forename: Sang Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Seon Ok
authors.initials: SO
authors.lastname: Min
authors.forename: Kyung Sik
authors.initials: KS
authors.lastname: Kim