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题名氯胺酮复合乌司他丁对大鼠内毒素性急性肺损伤的影响
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作者
曹殿青
蔡伟华
刘欣
郭翠容
余艳丽
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机构
广东医学院附属医院麻醉科
南海妇幼保健医院麻醉科
宜昌市第一人民医院麻醉科
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出处
《国际麻醉学与复苏杂志》
CAS
2012年第10期674-677,682,共5页
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文摘
目的 探讨氯胺酮复合乌司他丁对大鼠内毒素性急性肺损伤(acute lung injury, ALI)的影响。方法 成年雄性SD大鼠100只,体重280 g ~ 320 g,采用计算机简单随机分组法随机分为5组(每组20只):对照组(C组)、内毒素组(L组)、氯胺酮组(K组)、乌斯他丁组(U组)、氯胺酮复合乌斯他丁组(K+U组)。除C组外,其余大鼠腹腔注射0.03 %脂多糖(lipopolysaccharide, LPS)1 mg/kg,注射后16 h时,由尾静脉再次注射0.l % LPS 1.5 mg/kg,建立大鼠ALI 模型。U组、K+U组分别在第2次注射LPS后经尾静脉注射乌司他丁 50 000 U/kg,注射乌司他丁后即刻,K 组、K+U 组经尾静脉以微量泵持续输注氯胺酮 10 ㎎?㎏-1?h-1,其余组注射等容量生理盐水。于第2次注射 LPS 后1、2、3、4 h (T1~4)时,各组取5只大鼠,抽取腹主动脉血样0.5 ml,测定氧分压(PaO2),抽取下腔静脉血样2 ml,测定血清肿瘤坏死因子(tumor necrosis factor,TNF)-α和白介素(interleukin,IL)-6浓度;放血处死大鼠,取右肺上叶组织,光镜下观察肺组织病理学结果,进行肺组织病理半定量评分及测定核因子(nuclear factor-κB, NF-κB)抑制蛋白α (inhibitor of nuclear factor-κBα, IκBα)表达;取右肺中叶组织100 mg测定肺组织NF-κB活性;取右肺下叶组织,计算肺湿干重比(W/D)。结果 与C组比较,L组、K组、U组和K+U组PaO2降低,血清TNF-α、IL-6浓度和肺组织NF-κB活性升高,IκBα表达降低, W/D升高(P〈0.01);与L组比较,K组、U组和K+U组PaO2升高,血清TNF-α、IL-6浓度和肺组织NF-κB活性降低,IκBα表达升高,W/D降低,肺组织病理评分降低 (P〈0.05或0.01);与K组和U组比较,K+U组各时点PaO2升高,血清TNF-α、IL-6浓度和肺组织NF-κB活性(2.49±0.23)降低,IκBα表达(35.1±3.4)升高,W/D(4.91±0.16)降低,肺组织病理评分(7.8±0.8)降低(P〈0.05或0.01) 。结论 氯胺酮复合乌司他丁可减轻大鼠ALI,较两者单独应用效果显著。
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关键词
氯胺酮
乌司他丁
内毒素血症
呼吸窘迫综合征
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Keywords
Objective To investigate the effects of ketamine combined with ulinastatin against endotoxin-induced acute lung injury (ALI) in rats. Methods One hundred healthy male SD rats, weight 208 g-320 g, were randomly divided into 5 groups equally: groupⅠnormal control (C)
groupⅡ endotoxin (L)
group Ⅲ ketamine (K)
group Ⅳ ulinastatin (U) and groupⅤ(K+U). The animals received 2 doses of LPS (intraperitoneal LPS 1 mg/kg and iv LPS 1.5 mg/kg) at 16 h interval in groupⅡtogroupⅤ. The animals received ulinastatin 50 000 U/kg iv after second dose of LPS in group U and K+U. Ketamine was infused iv at 10 mg/kg/h in group K and K+U. Five animals in each group were killed by exsanguination at 1, 2, 3 and 4 h after second LPS administration. W/D lung weight ratio, blood gases, serum TNF-αand IL-6 concentrations and NF-КB activity and IκBα protein expression in the lung tissue were determined. Results LPS administration significantly increased serum TNF-αand IL-6 concentration and NF-κB activity in the lung tissue and decreased IκBα protein expression in groupⅡas compared with control group. The LPS-induced changes were attenuated by K/U/K+U in group Ⅲ, Ⅳ andⅤ. Compared with group K or group U, serum TNF-αand IL-6 concentration and NF-κB activity (2.49±0.23)in the lung tissue decreased and IκBα protein expression (35.1±3.4)increased significantly in group K+U. The protective effects of ketamine and ulinastatin against LPS-induced injury were synergistic. Conclusions Ketamine and ulinastatin have protective effects against LPS induced acute lung injury by inhibiting NF-КB activity, neutrophil activation and inflammatory responses, and are synergistic.
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分类号
R614
[医药卫生—麻醉学]
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