title: Changes of blood flow perfusion by MR and NF-kappabeta expression in the region of perihematoma after experimental intracerebral hemorrhage: a correlation study.
abstract: OBJECTIVE
  Tostudy the correlation between dynamic changes of regional cerebral blood flow (rCBF) and nuclear factor-kappa beta (NF-kappabeta) expression in the region of perihematoma after intracerebral hemorrhage (ICH).
  
  
  METHODS
  Twenty-seven healthy domestic cats were divided into control group (n = 3) and ICH group (n = 24) at random. They were observed at 3 hr, 6 hr, 12 hr, 24 hr, 48 hr, 72 hr, 7 days, and 15 days, respectively, for the dynamic changes of rCBF in the perihematomal region using perfusion-weighted imaging (PWI), and NF-kappabeta expressions using immunohistochemistry method.
  
  
  RESULTS
  In the perihematomal region, a noticeable decrease in rCBF had been observed within 12 hr, i.e. in a hypoperfusion state. However, cats then presented reperfusion or hyperperfusion during 12-24-hr period, and marginally hypoperfusion after 48 hr. NF-kappabeta positive cells were first found at 3-6 hr and peaked at 12-48 hr. At 72 hr to 7 days they showed a decreasing trend and nearly disappeared at 15 days.
  
  
  CONCLUSIONS
  NF-kappabeta expression was significantly increased due to ischemia reperfusion in the perihematomal region after cerebral ischemia, and the resulting inflammatory and immune reaction were the major causes for ischemia reperfusion injury in the perihematomal region.
authors.affiliation: Image Management, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China.
authors.forename: Dan
authors.initials: D
authors.lastname: He
authors.forename: Lin
authors.initials: L
authors.lastname: Zhao
authors.forename: Linfang
authors.initials: L
authors.lastname: Li
authors.forename: Huaijun
authors.initials: H
authors.lastname: Liu
authors.forename: Lihong
authors.initials: L
authors.lastname: Zhang
authors.forename: David T
authors.initials: DT
authors.lastname: Yew