title: Protective Effect of Peroxiredoxin 6 in Ischemia/Reperfusion-Induced Damage of Small Intestine.
abstract: BACKGROUND
  Strong oxidative stress starting in the epithelium upon restoration of blood cell circulation is a major cause of necrosis of the intestinal epithelium in ischemia/reperfusion-induced damage.
  
  
  OBJECTIVE
  The purpose of this study was to investigate the tissue-protective effect of exogenous peroxiredoxin 6 (Prx6) in ischemia/reperfusion-induced damage of small intestine.
  
  
  METHODS
  The research was carried out using a model of acute superior mesenteric artery occlusion in Wistar male rats. Exogenous Prx6 was administrated intravenously 15 min prior to small intestine ischemia. The distribution of endogenous Prx6 in the small intestine was determined by immunohistochemical analysis. The expression level of antioxidant enzymes was evaluated by RT-PCR in real time.
  
  
  RESULTS
  Exogenous Prx6 injected to animals intravenously was detected in blood vessel lumens, and its diffuse distribution was subsequently confirmed in the intestinal epithelium. Expression analysis of genes coding for major antioxidant enzymes demonstrated a significant activation of SOD 1, SOD 3, Prx6, GPx2, GPx7 expression during I/R-induced damage of the small intestine. Injection of exogenous Prx6 prior to induced ischemia resulted in minimization of oxidative injury by reducing necrosis and apoptosis, by normalization of gene activity of antioxidant enzyme. It eventually led to a reduction of epithelium destruction in the small intestine. By contrast, administration of a purified mutant form of Prx6 (Prx6C47S) without peroxidase activity had no protective effect.
  
  
  CONCLUSIONS
  The application of exogenous Prx6 enables normalization of the antioxidant status of the small intestine and reduction of cell destruction upon I/R-induced organ damage.
authors.affiliation: Institute of Cell Biophysics, Russian Academy of Sciences, 3, Institutskaya, Pushchino, Moscow Region, Russia, 142290. gordeeva1310@yandex.ru.
authors.forename: A E
authors.initials: AE
authors.lastname: Gordeeva
authors.affiliation: N.V. Sklifosovsky Research Institute for Emergency Medicine of Moscow Healthcare Department, Moscow, Russia. aa-temnov@yandex.ru.
authors.forename: A A
authors.initials: AA
authors.lastname: Temnov
authors.affiliation: Department of Structural and Computational Biology, Max. F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, 1030, Vienna, Austria. alexej.charnagalov@univie.ac.at.
authors.forename: A A
authors.initials: AA
authors.lastname: Charnagalov
authors.affiliation: Institute of Cell Biophysics, Russian Academy of Sciences, 3, Institutskaya, Pushchino, Moscow Region, Russia, 142290. sharapov.mars@gmail.com.
authors.forename: M G
authors.initials: MG
authors.lastname: Sharapov
authors.affiliation: Institute of Cell Biophysics, Russian Academy of Sciences, 3, Institutskaya, Pushchino, Moscow Region, Russia, 142290. fessenko-ee@rambler.ru.
authors.forename: E E
authors.initials: EE
authors.lastname: Fesenko
authors.affiliation: Institute of Cell Biophysics, Russian Academy of Sciences, 3, Institutskaya, Pushchino, Moscow Region, Russia, 142290. novoselov-vi@rambler.ru.
authors.forename: V I
authors.initials: VI
authors.lastname: Novoselov
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D053148:Caspase 3 / Q000235:genetics / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D004798:Enzymes / Q000235:genetics / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D007150:Immunohistochemistry; D007421:Intestine, Small / Q000378:metabolism / Q000473:pathology*; D008297:Male; D009154:Mutation; D018384:Oxidative Stress; D054465:Peroxiredoxin VI / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species; D015427:Reperfusion Injury / Q000378:metabolism / Q000517:prevention & control*
chemical_list: D000975:Antioxidants; D004798:Enzymes; D017382:Reactive Oxygen Species; D054465:Peroxiredoxin VI; D053148:Caspase 3
keywords: Ischemia/reperfusion-induced damage; Oxidative stress; Peroxiredoxin 6