• Department of Cardiac Surgery,Beijing An Zhen Hospital,Capital Medical University,Beijing 100029,P. R. China;
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Objective To investigate the protective effects of antitumor necrosis factor-α antibody (TNF-αAb) on lung injury after cardiopulmonary bypass (CPB) and their mechanisms. Methods Forty healthy New Zealand white rabbits,weighting 2.0-2.5 kg,male or female,were randomly divided into 4 groups with 10 rabbits in each group. In groupⅠ,the rabbits received CPB and pulmonary arterial perfusion. In group Ⅱ,the rabbits received CPB and pulmonary arterial perfusion with TNF-αAb. In group Ⅲ,the rabbits received CPB only. In group Ⅳ,the rabbits only received sham surgery. Neutrophils count,TNF-α and malondialdehyde (MDA) concentrations of the blood samples from the left and right atrium as well as oxygenation index were examined before and after CPB in the 4 groups. Pathological and ultrastructural changes of the lung tissues were observed under light and electron microscopes. Lung water content,TNF-α mRNA and apoptoticindex of the lung tissues were measured at different time points. Results Compared with group Ⅳ,after CPB,the rabbitsin group Ⅰ to group Ⅲ showed significantly higher blood levels of neutrophils count,TNF-α and MDA(P<0.05),higherTNF-α mRNA expression,apoptosis index and water content of the lung tissues (P<0.05),and significantly lower oxyg-enation index (P<0.05) as well as considerable pathomorphological changes in the lung tissues. Compared with group Ⅱ,after CPB,the rabbits in groups Ⅰ and Ⅲ had significantly higher blood concentrations of TNF-α (5 minutes after aortic declamping,220.43±16.44 pg/ml vs.185.27±11.78 pg/ml,P<0.05;249.99±14.09 pg/ml vs.185.27±11.78 pg/ml,P<0.05),significantly higher apoptosis index (at the time of CPB termination,60.7‰±13.09‰ vs. 37.9‰±7.78‰,P<0.05;59.6‰±7.74‰ vs. 37.9‰±7.78‰,P<0.05),significantly higher blood levels of neutrophils count and MDA (P<0.05),significantly higher TNF-α mRNA expression and water content of the lung tissues (P<0.05),and significantly loweroxygenation index (P<0.05) as well as considerable pathomorphological changes in the lung tissues. Compared with groupⅠ,rabbits in group Ⅲ had significantly higher above parameters (P<0.05) but lower oxygenation index (P<0.05) only at 30 minutes after the start of CPB. Conclusion Pulmonary artery perfusion with TNF-αAb can significantly attenuate inflammatory lung injury and apoptosis of the lung tissues during CPB.

Citation: YU Yang,GAO Mingxin,LI Haitao,ZHANG Fan,BAI Chen,GU Chengxiong.. Intra-pulmonary Artery Infusion of Antitumor Necrosis Factor-α Antibody Attenuates Lung Injury after Cardiopu-lmonary Bypass. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2013, 20(6): 698-704. doi: 10.7507/1007-4848.20130214 Copy

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