title: Effect of different periods of hyperbaric oxygen on ischemia-reperfusion injury of rat skeletal muscle.
abstract: The effect of hyperbaric oxygen (HBO) on ischemia-reperfusion injury of skeletal muscle, applied during different periods, was studied in 56 male rats. Animals were subjected to 6-h ischemia by a tourniquet over the major femoral trocanter and 4 (A) or 24 (B) h of reperfusion. HBO was carried out during 1 h in an acrylic chamber at a pressure of 2.0 ATA (100% oxygen): in the last 60 min of ischemia (II), after ischemia, during 1-h reperfusion time (III), and during the last hour of ischemia plus 1-h reperfusion (IV). Group I was the control group. After 4- or 24-h reperfusion, samples of the soleus muscle were stained by H&E and analyzed immunohistochemically. No interstitial hemorrhage, neutrophil infiltrate, or cellular necrosis were induced by HBO. The apoptosis index did not differ among the groups. HBO reduced morphologic alterations and promoted better results when administered in the ischemia plus reperfusion period (GIV).
authors.affiliation: Orthopedic Division, Medical School of Federal University of Grande Dourados, Mato Grosso do Sul, Brazil.
authors.forename: João
authors.initials: J
authors.lastname: Vidigal
authors.forename: Djalma
authors.initials: D
authors.lastname: José Fagundes
authors.forename: Manuel
authors.initials: M
authors.lastname: De Jesus Simões
authors.forename: Celina T F
authors.initials: CT
authors.lastname: Oshima
authors.forename: Alexandre Nakao
authors.initials: AN
authors.lastname: Odashiro
authors.forename: Ricardo
authors.initials: R
authors.lastname: Santos Simões
authors.forename: Anna Tereza
authors.initials: AT
authors.lastname: Negrini Fagundes
authors.forename: Murched Omar
authors.initials: MO
authors.lastname: Taha
authors.forename: Edna Frasson de Souza
authors.initials: EF
authors.lastname: Montero
mesh_terms: D000818:Animals; D017209:Apoptosis; D053148:Caspase 3 / Q000378:metabolism; D004487:Edema / Q000209:etiology / Q000517:prevention & control; D006470:Hemorrhage / Q000517:prevention & control; D006931:Hyperbaric Oxygenation; D008297:Male; D018482:Muscle, Skeletal / Q000098:blood supply* / Q000378:metabolism / Q000473:pathology; D009135:Muscular Diseases / Q000209:etiology / Q000517:prevention & control; D009336:Necrosis; D051381:Rats; D017208:Rats, Wistar; D015427:Reperfusion Injury / Q000378:metabolism / Q000517:prevention & control*; D013482:Superoxide Dismutase / Q000378:metabolism; D013997:Time Factors
chemical_list: D013482:Superoxide Dismutase; D053148:Caspase 3