title: Cardioprotective effects of sour cherry seed extract (SCSE) on the hypercholesterolemic rabbit heart.
abstract: OBJECTIVE
  The present study evaluates the hypothesis that sour cherry seed extract (SCSE) protects against cardiovascular disease and inflammation in hypercholesterolemic rabbits, and that this protection correlates with SCSE-induced activity of heme oxygenase- 1 (HO-1), a cytoprotective enzyme contributing to oxidative stress responses.
  
  
  METHODS
  18 New Zealand white rabbits were divided into three groups receiving: I. cholesterol-free rabbit chow; II. chow containing 2% cholesterol; or III. 2% cholesterol plus SCSE for 16 weeks. Heart functions were monitored by echocardiography 0, 4, and 16 weeks after the initiation of cholesterol-supplemented feeding. At the 16-week time-point, isolated hearts were subjected to ischemia-reperfusion (I/R), followed by measurement of heart rate (HR), aortic flow (AF), coronary flow (CF), aortic pressure (AoP), and left ventricular developed pressure (LVDP). Myocardial infarct size was determined using triphenyl tetrazolium chloride (TTC). Quantification of fatty streaks was assessed using Sudan-III staining. Western blot analysis was used to determine the content of cytochrome c oxidase III (COX III), vascular endothelial growth factor (VEGF), and HO-1 in the myocardium.
  
  
  RESULTS
  Relative to cholesterol-treated animals not receiving SCSE, SCSE-treated animals exhibited significantly improved cardiac function and improved peak early diastolic velocity to peak atrial velocity ratio (E'/A'), along with decreased atherosclerotic plaque formation and infarct size. Increased HO-1 and COX III protein expression and COX activity were also noted in hearts from SCSE-treated rabbits.
  
  
  CONCLUSIONS
  This study demonstrates SCSE cardioprotective effects on hypercholesterolemic hearts. Correlation of these outcomes with HO-1 expression suggests that the effect may be mediated by activity of this enzyme. However, definitive proof of HO-1 dependence requires further investigation.
authors.affiliation: Department of Pharmacology, Faculty of Pharmacy, Health and Science Center, University of Debrecen Nagyerdei krt. 98., 4032 Debrecen Hungary. juhasz.bela@pharm.unideb.hu.
authors.forename: Bela
authors.initials: B
authors.lastname: Juhasz
authors.forename: Attila
authors.initials: A
authors.lastname: Kertész
authors.forename: Jozsef
authors.initials: J
authors.lastname: Balla
authors.forename: Gyorgy
authors.initials: G
authors.lastname: Balla
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Szabo
authors.forename: Mariann
authors.initials: M
authors.lastname: Bombicz
authors.forename: Daniel
authors.initials: D
authors.lastname: Priksz
authors.forename: Rudolf
authors.initials: R
authors.lastname: Gesztelyi
authors.forename: Balazs
authors.initials: B
authors.lastname: Varga
authors.forename: David D
authors.initials: DD
authors.lastname: Haines
authors.forename: Arpad
authors.initials: A
authors.lastname: Tosaki
mesh_terms: D000818:Animals; D002316:Cardiotonic Agents / Q000494:pharmacology*; D002784:Cholesterol / Q000097:blood; D006937:Hypercholesterolemia / Q000517:prevention & control*; D008297:Male; D010936:Plant Extracts / Q000494:pharmacology*; D027861:Prunus / Q000737:chemistry* / Q000196:embryology; D011817:Rabbits; D012639:Seeds / Q000737:chemistry
chemical_list: D002316:Cardiotonic Agents; D010936:Plant Extracts; D002784:Cholesterol