急性肺损伤大鼠白细胞变形性变化及山莨菪碱影响

目的 探讨多形核白细胞（ＰＭＮ）变形性变化在大鼠内毒素性急性肺损伤（ＡＬＩ）中的作用机制及山莨菪碱对ＰＭＮ变形性变化的影响。方法 ４４只大鼠通过静脉注射内毒素（５ｍｇ／ｋｇ）复制大鼠ＡＬＩ模型，每组分为：（１）内毒素１小时组（８只）；（２）内毒素４小时组（８只）；（３）内毒素６小时组（８只）；（４）山莨菪碱治疗组（８只），注射内毒素后，立即静脉注射山莨菪碱５ｍｇ／ｋｇ；（５）正常对照组（１２只），

Changes of the deformability of neutrophil and the influence of anisodamine on neutrophil deformability during endotoxin induced acute lung injury in rats

OBJECTIVE: To explore the mechanisms of change of deformability of polymorphonuclear leukocytes (PMN) and influence of anisodamine on deformability of PMN during endotoxin-induced acute lung injury (ALI) in rat. To explore the role of PMN in ALI. METHOD: The model of ALI in rat was reproduced by intravenous injection of E Coli endotoxin. The deformability of PMN was measured by micropipette aspiration technique. RESULT: The elastic modulus K1 of PMN at the 1st hour (33 +/- 12 Pa), 4th hours (37 +/- 12 Pa, 1 Pa = 0.0075 mmHg) and 6th hours (38 +/- 13 Pa) after injection of E Coli endotoxin are all significantly higher than that in the control group (26 +/- 9 Pa P < 0.01). The viscosity modulus (mu) of PMN at the 4th hours (5 +/- 3 Pa.s) and 6th hours (6 +/- 3 Pa.s) after injection of E Coli endotoxin are all significantly higher than the control group (3.1 +/- 2.6 Pa.s, P < 0.01). The elastic shear modulus (G) of PMN at the 4th hours (54 +/- 20 Pa) and the 6th hours (56 +/- 21 Pa) after injection of E Coli endotoxin are all significantly higher than the control group (47 +/- 17 Pa, P < 0.05). The K1(33 +/- 12 Pa) and mu(4 +/- 3 Pa.s) in anisodamine group are all significantly lower than endotoxin group in the same time phases (P < 0.05). CONCLUSION: The deformability of PMN decrease remarkably during ALI, which will enhance PMN sequestration in lungs, lead to ALI. It may be one of important pathogenic mechanism of ALI. The anisodamine can inhibit the decrease of deformability of PMN effectively and may have some therapeutic effect on ALI.