Effects of inosine on reperfusion injury after cardiopulmonary bypass
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- 作者：Gábor Veres (1) (2)
Tamás Radovits (1) (3)
Leila Seres (4)
Ferenc Horkay (2)
Matthias Karck (1)
Gábor Szabó (1) - 刊名：Journal of Cardiothoracic Surgery
- 出版年：2010
- 出版时间：December 2010
- 年：2010
- 卷：5
- 期：1
- 全文大小：619KB
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Tamás Radovits (1) (3)
Leila Seres (4)
Ferenc Horkay (2)
Matthias Karck (1)
Gábor Szabó (1)
1. Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
2. Department of Cardiac Surgery, Semmelweis University, Budapest, Hungary
3. Heart Center, Semmelweis University, Budapest, Hungary
4. Gottsegen National Institute of Cardiology, Budapest, Hungary
文摘
Objective Inosine, a break-down product of adenosine has been recently shown to exert inodilatory and anti-inflammatory properties. Furthermore inosine might be a key substrate of pharmacological post-conditioning. In the present pre-clinical study, we investigated the effects of inosine on cardiac function during reperfusion in an experimental model of cardioplegic arrest and extracorporal circulation. Methods Twelve anesthetized dogs underwent hypothermic cardiopulmonary bypass. After 60 minutes of hypothermic cardiac arrest, reperfusion was started after application of either saline vehicle (control, n = 6), or inosine (100 mg/kg, n = 6). Left ventricular end-systolic pressure volume relationship (ESPVR) was measured by a combined pressure-volume-conductance catheter at baseline and after 60 minutes of reperfusion. Left anterior descendent coronary blood flow (CBF), endothelium-dependent vasodilatation to acetylcholine (ACh) and endothelium-independent vasodilatation to sodium nitroprusside (SNP) were also determined. Results The administration of inosine led to a significantly better recovery (given as percent of baseline) of ESPVR 90 ± 9% vs. 46 ± 6%, p < 0.05. CBF and was also significantly higher in the inosine group (56 ± 8 vs. 23 ± 4, ml/min, p < 0.05). While the vasodilatatory response to SNP was similar in both groups, ACh resulted in a significantly higher increase in CBF (58 ± 6% vs. 25 ± 5%, p < 0.05) in the inosine group. Conclusions Application of inosine improves myocardial and endothelial function after cardiopulmonary bypass with hypothermic cardiac arrest.