title: Influence of experimental periodontitis on cardiac oxidative stress in rats: a biochemical and histomorphometric study.
abstract: OBJECTIVE
  The role of oxidative stress in the process of cardiac remodeling, hypertrophy and heart failure is a current topic. The purpose of this experimental study was to investigate the influences of periodontitis on levels of cardiac oxidative stress.
  
  
  METHODS
  Twenty rats were separated into two groups: control and experimental periodontitis (EP). Periodontitis was induced by placing a 3.0 silk suture in the cervix of the left and right mandibular first molar teeth for 5 wk. At the end of the experiment, the animals were killed and blood samples and mandibular and ventricular cardiac tissue samples were collected. Levels of alveolar bone loss were determined using measurements performed on histological slices and radiographies. Left ventricular tissue 8-hydroxy-2'-deoxyguanosine, malonylaldehyde, glutathione peroxidase, total oxidant status, total antioxidant status (TAS) levels and serum paraoxonase-1 activity were evaluated biochemically.
  
  
  RESULTS
  Measurements performed on the histological slices and radiographies demonstrated that applying the ligature caused obvious alveolar bone loss. Oxidative damage markers (malonylaldehyde, 8-hydroxy-2'-deoxyguanosine, oxidative stress index: total oxidant status/TAS) were significantly higher, and antioxidant markers (glutathione peroxidase, TAS) were statistically insignificantly higher, in the hearts of rats with EP when compared to the controls. In addition, reduced serum paraoxonase-1 activity was also detected in the EP group.
  
  
  CONCLUSIONS
  The pronounced increase in cardiac oxidative stress caused by periodontitis was due to an excessive increase in the production of reactive oxygen species, rather than due to decreased antioxidant capacity. The results indicate that periodontitis-related cardiac oxidative stress might be one of the mechanisms that contribute to the pathological process that leads to heart failure.
authors.affiliation: Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey.
authors.forename: O
authors.initials: O
authors.lastname: Köse
authors.affiliation: Department of Periodontology, School of Dentistry, Ataturk University, Erzurum, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Arabacı
authors.affiliation: Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Yemenoglu
authors.affiliation: Department of Biochemistry, School of Veterinary Medicine, Ataturk University, Erzurum, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Ozkanlar
authors.affiliation: Department of Biochemistry, School of Medicine, Ataturk University, Erzurum, Turkey.
authors.forename: N
authors.initials: N
authors.lastname: Kurt
authors.affiliation: Department of Dentomaxillofacial Radiology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey.
authors.forename: I
authors.initials: I
authors.lastname: Gumussoy
authors.affiliation: Department of Histology and Embryology, School of Veterinary Medicine, Ataturk University, Erzurum, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Gedikli
authors.affiliation: Department of Histology and Embryology, School of Veterinary Medicine, Ataturk University, Erzurum, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Kara
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000818:Animals; D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000032:analysis; D005979:Glutathione Peroxidase / Q000378:metabolism; D006352:Heart Ventricles / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D008297:Male; D008315:Malondialdehyde / Q000032:analysis; D009206:Myocardium / Q000737:chemistry / Q000378:metabolism* / Q000473:pathology; D018384:Oxidative Stress; D010518:Periodontitis / Q000378:metabolism* / Q000473:pathology; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D008315:Malondialdehyde; D000080242:8-Hydroxy-2'-Deoxyguanosine; D005979:Glutathione Peroxidase; D003849:Deoxyguanosine
keywords: animal model; antioxidant; heart failure; oxidative stress; periodontal disease