title: [Effect of lidocaine precondition on hepatocytes calcium overload and apoptosis induced by cell hypoxia-reoxygenation].
abstract: OBJECTIVE
  To investigate the effect and possible mechanism of lidocaine precondition on calcium overload and apoptosis of the hepatocytes induced by cell hypoxia-reoxygenation.
  
  
  METHODS
  The cultured L02 hepatocytes were randomly divided into 3 groups: a hypoxia-reoxygenation group (Group I), a lidocaine precondition group (Group II), and a normal control group (Group III). After 4 hours of cell hypoxia and 10 hours of reoxygenation, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) concentrations in the nutritive medium were detected. The cytoplasm ionic calcium concentration was measured by fluoro spectrophotometer. The apoptosis was measured by flow cytometry and fluorescent microscope. The appearance and ultra-microstructure changes of hepatocytes were observed by inverted microscope and electronic microscope.
  
  
  RESULTS
  Cytoplasm ionic calcium concentration and apoptosis was positively correlated (r=0.7652, R(2)=0.5855, P< 0.05). The ALT concentration in the nutritive medium, AST concentration in the nutritive medium, cytoplasm ionic calcium concentration and the ratio of apoptosis of Group I and II were significantly higher than those of Group III(P< 0.05).The appearance and ultra-microstructure changes of Group I and II were worse than those of Group III. The ALT concentration in the nutritive medium, AST concentration in the nutritive medium, cytoplasm ionic calcium concentration and the ratio of apoptosis of Group II were significantly lower than those of Group I (P< 0.05). The ultra-microstructure injury of hepatocytes of Group II were less serious than those of Group I.
  
  
  CONCLUSIONS
  Precondition with lidocaine can attenuate calcium overload of hepatocytes induced by hypoxia-reoxygenation in vitro,and decrease the ratio of apoptosis.
authors.affiliation: Department of Anesthesiology, Third Xiangya Hospital, Central South University, Changsha 410013, China. ouyangwen133@vip.sina.com
authors.forename: Wen
authors.initials: W
authors.lastname: Ouyang
authors.forename: Kai-Ming
authors.initials: KM
authors.lastname: Duan
authors.forename: Xin-Hua
authors.initials: XH
authors.lastname: Zuo
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D002118:Calcium / Q000378:metabolism*; D015687:Cell Hypoxia / Q000187:drug effects; D002478:Cells, Cultured; D022781:Hepatocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D008012:Lidocaine / Q000494:pharmacology*; D010100:Oxygen / Q000378:metabolism
chemical_list: D008012:Lidocaine; D010100:Oxygen; D002118:Calcium