首页> 外文期刊>American Journal of Physiology >Phosphodiesterase type 4 inhibitor reduces the retention of polymorphonuclear leukocytes in the lung.
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Phosphodiesterase type 4 inhibitor reduces the retention of polymorphonuclear leukocytes in the lung.

机译:磷酸二酯酶4型抑制剂可减少肺中多形核白细胞的保留。

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摘要

Phosphodiesterase (PDE) type 4 is the predominant PDE isozyme in polymorphonuclear leukocytes (PMN) and plays a key role in the regulation of PMN activation. The aim of this study was to examine the effect of a PDE type 4 inhibitor, rolipram, on the functional changes and the retention of PMN in the lung. In vitro, F-actin content and L-selectin and CD11b expression of PMN stimulated by N-formyl-Met-Leu-Phe were measured by flow cytometry. PMN deformability was evaluated using silicon microchannels. Rolipram reduced the increase of F-actin and CD11b but did not change the decrease of L-selectin. Rolipram inhibited the increase of the transit time of PMN through the microchannel. We evaluated the retention of PMN in the lung in vivo by infusing labeled blood into the vena cava and examining the recovery into aortic root samples in rabbits. Rolipram inhibited the retention of stimulated PMN in the lung. In conclusion, a PDE type 4 inhibitor, rolipram, reduces the retention of PMN in the lung by reducing deformability change and CD11b upregulation of PMN.
机译:磷酸二酯酶(PDE)4型是多形核白细胞(PMN)中主要的PDE同工酶,在调节PMN激活中起关键作用。这项研究的目的是检查PDE 4型抑制剂咯利普兰对肺功能改变和PMN保留的影响。在体外,通过流式细胞术测量N-甲酰基-Met-Leu-Phe刺激的PMN的F-肌动蛋白含量以及L-选择蛋白和CD11b表达。使用硅微通道评估了PMN的可变形性。咯利普兰减少了F-肌动蛋白和CD11b的增加,但没有改变L-选择素的减少。咯利普兰抑制了PMN通过微通道的传播时间的增加。我们通过将标记的血液注入腔静脉并检查兔的主动脉根样品的恢复情况,评估了PMN在体内在肺中的保留。咯利普兰抑制受刺激的PMN在肺中的保留。总之,PDE 4型抑制剂rolipram可通过减少PMN的可变形性变化和CD11b上调来减少PMN在肺中的保留。

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