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- W1270090537 abstract "Purine efflux from transplanted human cardiac allografts was investigated as a potential biochemical correlate to graft preservation and eventual function. Coronary sinus effluent from 14 allografts was sampled at 1, 5, 10, 15, 20, and 25 minutes after reperfusion. The plasma fraction from each sample was analyzed for hypoxanthine, xanthine, urate, inosine, and adenosine by high-performance liquid chromatography. Total organ preservation time, aortic crossclamp and bypass times, and initial cardiac index off bypass were recorded. An inotropic score was calculated from the dosages of inotropic agents each recipient required immediately after transplantation. Inosine and adenosine were not detectable in the coronary sinus effluent at any time during reperfusion. Hypoxanthine concentration rose sevenfold (p < 0.001) 1 minute after reperfusion. Xanthine concentration peaked later at 5 minutes after reperfusion, a twofold increase (p < 0.02). As reperfusion continued, hypoxanthine and xanthine concentrations returned toward baseline levels. The rise in coronary sinus xanthine concentration provides evidence for hypoxanthine degradation by xanthine oxidase during the immediate reperfusion period. The extent of hypoxanthine efflux correlated with total graft ischemic time (p < 0.05), inotropic score (p < 0.005), and the time from crossclamp release to cessation of bypass (p < 0.01). Hypoxanthine efflux can be used as a sensitive and objective biochemical indicator of graft preservation and immediate function." @default.
- W1270090537 created "2016-06-24" @default.
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- W1270090537 date "1994-02-01" @default.
- W1270090537 modified "2023-09-29" @default.
- W1270090537 title "Purine efflux from transplanted human cardiac allografts" @default.
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- W1270090537 doi "https://doi.org/10.1016/s0022-5223(94)70093-1" @default.
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