title: Correlation between Amitriptyline-Induced Cardiotoxic Effects and Cardiac S100b Protein in Isolated Rat Hearts.
abstract: BACKGROUND
  Amitriptyline is an important cause of mortality due to its cardiovascular toxicity.
  
  
  OBJECTIVE
  To investigate the changes in levels of cardiac S100b protein on amitriptyline-induced cardiotoxicity and also to examine the correlation between amitriptyline-induced cardiotoxic effects and cardiac S100b protein in an isolated rat heart model.
  
  
  METHODS
  Animal experimentation, isolated heart model.
  
  
  METHODS
  After a stabilization period, isolated hearts were randomized to two groups (n=5 and n=7). In the control group, isolated hearts were subjected to an infusion of 5% dextrose for 60 minutes. In the amitriptyline group, 5.5×10-5M amitriptyline was infused for 60 minutes to achieve amitriptyline toxicity. After the infusion period, heart tissues were removed for histological examination.
  
  
  RESULTS
  In comparison to control treatment, amitriptyline infusion decreased left ventricular developed pressure (LVDP), dp/dtmax and heart rate (HR) and significantly prolonged QRS duration (p<0.05). The semiquantitative scores for S100b protein levels in amitriptyline-infused hearts were higher than in the control group (p<0.01). At the end of the experiment, in the amitriptyline-infused group, significant correlations were found between LVDP and S100b protein scores (r=-0.807, p=0.003) and between QRS duration and S100b protein scores (r=0.859, p=0.001).
  
  
  CONCLUSIONS
  Our results indicate that the S100b protein may be a helpful indicator or biomarker in studying the cardiotoxic effects of amitriptyline.
authors.affiliation: Division of Clinical Toxicology, Department of Pharmacology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Nil
authors.initials: N
authors.lastname: Hocaoğlu
authors.affiliation: Department of Pharmacology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Nergis
authors.initials: N
authors.lastname: Murat
authors.affiliation: Deparment of Histology and Embryology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Serap Cilaker
authors.initials: SC
authors.lastname: Mıcılı
authors.affiliation: Department of Pharmacology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Burç
authors.initials: B
authors.lastname: Aydın
authors.affiliation: Deparment of Histology and Embryology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Bekir Uğur
authors.initials: BU
authors.lastname: Ergür
authors.affiliation: Division of Clinical Toxicology, Department of Pharmacology, Dokuz Eylül University School of Medicine, İzmir, Turkey.
authors.forename: Şule
authors.initials: Ş
authors.lastname: Kalkan
keywords: S100b protein; amitriptyline; isolated heart; rat; toxicity