| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2013-08-27 |
| タイトル |
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タイトル |
Protective Effects of Hydrogen Peroxide Against Ischemia/Reperfusion Injury in Perfused Rat Hearts |
|
言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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|
主題 |
Energy metabolism |
| キーワード |
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|
主題 |
Ischemic preconditioning |
| キーワード |
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|
主題 |
Oxygen species |
| キーワード |
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|
主題 |
Perfused hearts |
| キーワード |
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|
主題 |
NMR spectroscopy |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| その他のタイトル |
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その他のタイトル |
灌流ラット心の虚血-再灌流障害に対する過酸化水素の保護作用 |
| 著者 |
Yaguchi, Yasuhiro
Satoh, Hiroshi
Wakahara, Nobuyuki
Katoh, Hideki
Uehara, Akihiko
Terada, Hajime
Fujise, Yutaka
Hayashi, Hideharu
|
| 書誌情報 |
en : Circulation Journal
巻 67,
号 3,
p. 253-258,
発行日 2003-02-20
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| 出版者 |
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出版者 |
THE JAPANESE CIRCULATION SOCIETY |
|
言語 |
en |
| 権利 |
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|
権利情報 |
Copyright 2003 THE JAPANESE CIRCULATION SOCIETY |
| 権利 |
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|
権利情報 |
本文データは学協会の許諾に基づきCiNiiから複製したものである |
| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Among the several mechanisms proposed for ischemic preconditioning (IPC), generation of reactive oxygen species (ROS) is reported to be involved in the cardioprotective effects of IPC. The present study was designed to investigate whether repetitive exposure to hydrogen peroxide (H2O2) can protect the myocardium against subsequent ischemia/reperfusion injury, and whether the H2O2-induced cardioprotection is related to the preservation of energy metabolism. Langendorff-perfused rat hearts were exposed to two, 5 min episodes of IPC or to various concentrations of H2O2 twice and then to 35 min global ischemia and 40 min reperfusion. Using 31P nuclear magnetic resonance (31P-NMR) spectroscopy, cardiac phosphocreatine (PCr) and ATP and intracellular pH (pHi) were monitored. IPC and the treatment with 2μmol/L H2O2 significantly improved the post-ischemic recovery of left ventricular developed pressure (LVDP) and the PCr and ATP compared with those of the control ischemia/reperfusion (LVDP: 36.9±7.4% of baseline in control hearts, 84.0±3.5% in IPC, 65.4±3.8% in H2O2; PCr: 51.1±5.3% in control hearts, 81.4±5.5% in IPC, 81.7±5.2% in H2O2; ATP: 12.3±1.6% in control hearts; 30.0±2.8% in IPC, 28.6±2.3% in H2O2, mean±SE, p<0.05). However, lower (0.5μmol/L) or higher (10μmol/L) concentration of H2O2 had no effect. There were significant linear correlations between mean LVDP and highenergy metabolites after 40 min reperfusion in H2O2-treated hearts. In IPC-treated hearts, the mean LVDP was greater than that in the 2μmol/L H2O2-treated hearts under similar levels of high-energy metabolites. IPC also ameliorated intracellular acidification (6.38±0.03 in control hearts, 6.65±0.04 in IPC, p<0.05), but treatment with H2O2 did not affect pHi during ischemia (6.40±0.05 in H2O2). In conclusion, H2O2 had protective effects against ischemia/reperfusion injury and the effects were related to the preservation of energy metabolism. IPC could have additional protective mechanisms that are associated with the amelioration of intracelluar acidosis during ischemia. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
13469843 |
| EISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
13474820 |
| NII論文ID |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
NAID |
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関連識別子 |
110002666290 |
| 出版社DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
10.1253/circj.67.253 |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
CircJ-67-253.pdf (260.0 kB)
