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• W2001796313 abstract "Free radicals produced during myocardial post-ischemic reperfusion are aggravating factors for functional disturbances and cellular injury. The aim of our work was to investigate the significance of the secondary free radical release during non ischemic perfusion and post-ischemic reperfusion and to evaluate the cardiovascular effects of the spin trap used. For that purpose, isolated perfused rat hearts underwent 0, 20, 30 or 60 min of a total ischemia, followed by 30 min of reperfusion. The spin trap: alpha-phenyl N-tert-butylnitrone (PBN) was used (3 mM). Functional parameters were recorded and samples of coronary effluents were collected and analyzed using Electron Paramagnetic Resonance (EPR) to identify and quantify the amount of spin adducts produced. During non ischemic perfusion, almost undetectable levels of free radical release were observed. Conversely, a large and long-lasting (30 min) release of spin adducts was detected from the onset of reperfusion. The free radical species were identified as alkyl and alkoxyl radicals with amounts reaching 40 times the pre-ischemic values. On the other hand, PBN showed a cardioprotective effect, allowing a significant reduction of rhythm disturbances and a better post-ischemic recovery for the hearts which were submitted to 20 min of ischemia. When the duration of ischemia increased, the protective effects of PBN disappeared and toxic effects became more important. Our results have therefore confirmed the antioxidant and protective properties of a spin trap agent such as PBN. Moreover, we demonstrated that the persistent post-ischemic dysfunction was associated with a sustained production and release of free radical species." @default.
• W2001796313 created "2016-06-24" @default.
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• W2001796313 date "2001-01-01" @default.
• W2001796313 modified "2023-09-23" @default.
• W2001796313 title "Isolated perfused rat hearts release secondary free radicals during ischemia reperfusion injury: Cardiovascular effects of the spin trap α-phenyl<i>N-tert</i>-butylnitrone" @default.
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• W2001796313 doi "https://doi.org/10.1080/10715760100301491" @default.
• W2001796313 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11767406" @default.
• W2001796313 hasPublicationYear "2001" @default.
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