实用肝脏病杂志 ›› 2014, Vol. 17 ›› Issue (2): 176-179.doi: 10.3969/j.issn.1672-5069.2014.02.016

• 实验性肝炎 • 上一篇    下一篇

肝肺综合征大鼠血细胞因子和肺血管巨噬细胞观察

郭月宁,王立国,王夏珍,张薇   

  1. 150001哈尔滨市 哈尔滨医科大学附属第一医院呼吸内科(郭月宁,王夏珍,张薇) ;哈尔滨医科大学附属第四医院消化内科(王立国)
  • 收稿日期:2013-11-20 出版日期:2014-08-20 发布日期:2016-04-15
  • 通讯作者: 张薇 E-mail:weipoza@163.com
  • 作者简介:郭月宁,女,25岁,硕士研究生,住院医师。主要从事肝肺综合征发病机制的研究。E-mail:tian868tian3@163.com

Changes of serum cytokines and pulmonary intravascular macrophages in rats with hepatopulmonary syndrome

Guo Yuening,Wang Liguo,Wang Xiazhen,et al.   

  1. Department of Respiratory Disease,First Affiliated Hospital,Harbin Medical University, Harbin 150001, Heilongjiang Province,China.
  • Received:2013-11-20 Online:2014-08-20 Published:2016-04-15

摘要: 目的 观察肝肺综合征大鼠肺组织中肺血管巨噬细胞浸润情况和血浆内毒素水平。 方法 取Wistar大鼠30只,随机分为假手术组和胆总管结扎肝纤维化模型组(CBDL组),于造模5 w末处死动物,收集血清及肝肺组织;分别检测血气、内毒素(鲎试验)、一氧化氮(硝酸还原酶法)、肿瘤坏死因子-α(ELISA法),观察肝、肺组织病理学变化及肺组织肺血管内巨噬细胞的浸润情况。结果 在CBDL组动物,5 w时血气分析示PaO2为(64.2±7.3)mmHg,显著低于假手术组【(97.7±4.5)mmHg,P<0.05)】;CBDL组5 w时血浆内毒素、一氧化氮和肿瘤坏死因子-α分别为(0.2297±0.0362)Eu/ml、(56.2±9.5)μmol/L和(1.5±0.2)ng/ml,均明显高于假手术组【(0.0938±0.0309)Eu/ml、(32.9±4.3)μmol/L和(1.5±0.2)ng/ml,P<0.05)】;病理学检查示5 w时模型组大鼠肝组织可见纤维化表现,肺组织中肺毛细血管扩张、充血,有肺血管巨噬细胞存在。结论 在胆总管结扎法诱导的大鼠肝硬化模型中,血清内毒素水平升高、肺血管巨噬细胞浸润和炎性细胞因子分泌增加,可能是肺血管扩张、低氧血症及肝肺综合征发生的重要机制。

关键词: 肝肺综合征, 巨噬细胞, 内毒素, 胆总管结扎, 大鼠

Abstract: Objective To evaluate pulmonary intravascular macrophage accumulation and changes of plasma level of endotoxin in rats with hepatopulmonary syndrome (HPS). Methods Thirty Wistar rats receiving sham surgery or common bile duct ligation (CBDL) were sacrificed 5 weeks after surgery;Arterial blood were obtained for arterial blood gas analysis,and plasma were obtained for measurement of endotoxin(by Limulus test),nitric oxide (by Nitrale reduetase) and tumor necrosis factor alpha (by ELISA);The lung and liver tissues were collected for histological evaluation. Results As compared to sham group,rats in CBDL group at fifth week had lower PaO2 [(64.2±7.3) mmHg vs. (97.7±4.5) mmHg,P<0.05], higher plasma levels of endotoxin,nitric oxide and tumor necrosis factor-ɑ [(0.2297±0.0362) Eu/ml vs. (0.0938±0.0309) Eu/ml,(56.2±9.5) μmol/L vs.(32.9±4.3) μmol/L,and(1.5±0.2) ng/ml vs.(0.4±0.1) ng/ml,respectively,P<0.05];The histological examination revealed that fibrosis in the liver and the expansion and congestion of the pulmonary capillaries together with pulmonary intravascular macrophage accumulation in the lung,were observed in CBDL-treated rats. Conclusions In rats with experimental model of hepatic cirrhosis,the elevated level of plasma endotoxin,accumulation of pulmonary intravascular macrophages and increased secretion of inflammatory cytokines may contribute to intrapulmonary vasodilation and hyoxemia as a result of hepatopulmonary syndrome.

Key words: Hepatopulmanory syndrome, Macrophages, Endotoxin, Bile duct ligation, Rats