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乌司他丁对脓毒症大鼠急性肺损伤的保护作用及其机制研究 被引量:15

Protective effect of ulinastatin on acute lung injury in sepsis rats and its mechanism
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摘要 目的研究乌司他丁对脂多糖诱导的脓毒症大鼠急性肺损伤的保护作用及其机制。方法将52只大鼠分为乌司他丁组和对照组,每组26只。两组大鼠腹腔注射脂多糖溶液(10 mg/kg)以制备脓毒症模型,分别于建模前18 h和3 h,乌司他丁组大鼠给予乌司他丁(100 000 U/kg),对照组注射等量生理盐水。于造模成功后0.5、2、4、12、24、72 h各时间点采血检测肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)、IL-10及肺泡灌洗液蛋白浓度,并通过光学显微镜观察肺组织病理学改变。结果两组大鼠血浆TNF-α、IL-6、IL-10及肺泡灌洗液总蛋白浓度各时间点比较,差异均有统计学意义(F=5.899,P=0.040;F=7.932,P=0.029;F=18.450,P=0.005;F=6.467,P=0.038),且与对照组相比较,乌司他丁组在0.5、2、4、12、24、72 h各时间点的血浆TNF-α[(21.6±3.8)ng/L vs.(14.8±2.5)ng/L,(69.2±3.2)ng/L vs.(48.8±3.9)ng/L,(74.8±6.9)ng/L vs.(56.3±4.2)ng/L,(120.2±43.8)ng/L vs.(106.4±65.8)ng/L,(190.2±30.4)ng/L vs.(119.8±28.9)ng/L,(159.7±10.5)ng/L vs.(112.3±10.2)ng/L]、IL-6[(145±6)ng/L vs.(119±5)ng/L,(344±19)ng/L vs.(225±22)ng/L,(458±36)ng/L vs.(273±28)ng/L,(949±64)ng/L vs.(328±27)ng/L,(841±61)ng/L vs.(306±6)ng/L,(899±35)ng/L vs.(278±16)ng/L]及肺泡灌洗液总蛋白浓度[(320±8)mg/L vs.(290±17)mg/L,(400±7)mg/L vs.(336±9)mg/L,(536±10)mg/L vs.(492±14)mg/L,(806±10)mg/L vs.(608±17)mg/L,(781±17)mg/L vs.(579±16)mg/L,(662±24)mg/L vs.(505±9)mg/L]均明显降低(P均<0.05),而血浆IL-10浓度[(5.7±0.8)ng/L vs.(11.7±0.9)ng/L,(17.2±1.6)ng/L vs.(31.9±2.6)ng/L,(22.3±2.1)ng/L vs.(54.7±4.8)ng/L,(42.3±4.9)ng/L vs.(80.7±1.9)ng/L,(29.7±1.4)ng/L vs.(69.4±3.4)ng/L,(21.4±2.9)ng/L vs.(74.3±5.5)ng/L]均明显升高(P均<0.05)。对照组大鼠肺泡间隔增厚,间质充血水肿,炎性细胞浸润,肺泡塌陷,而乌司他丁组大鼠上述病理学改变明显减轻。结论乌司他丁是通过下调TNF-α、IL-6,上调IL-10水平,从而抑制炎症细胞在肺部的浸润以及肺组织中蛋白酶的表达来保护脂多糖诱导的脓毒症大鼠急性肺损伤。 Objective To observe the effect and mechanism of ulinastatin on protecting acute lung injury (ALI) in sepsis rats induced by lipopolysaccharide (LPS). Methods Fifty-two rats were randomly assigned to the ulinastatin group (n=26) and control group (n=26). All the rats were given LPS (10 mg/kg) intraperitoneally, and rats in the ulinastatin group were injected ulinastatin (100000 U / kg) on 18, 3 h before modeling, and rats in the control group were received equivalence saline. The levels of tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), IL-10 and total protein levels in bronchoalveolar lavage fluid (BALF) were detected at 0.5, 2, 4, 12, 24 and 72 h after modeling. The pathological changes in the lung tissues were observed by optical microscope. Results The levels of TNF-α, IL-6, IL-10 and total protein in BALF all showed significant differences between the two groups (F = 5.899, P = 0.040;F=7.932, P=0.029; F=18.450, P=0.005; F=6.467, P=0.038). And compared with the control group, TNF-α [(21.6 ± 3.8) ng/L vs. (14.8 ± 2.5) ng/L, (69.2 ± 3.2) ng/L vs. (48.8 ± 3.9) ng/L, (74.8 ± 6.9) ng/L vs. (56.3 ± 4.2) ng/L, (120.2 ± 43.8) ng/L vs. (106.4 ± 65.8) ng/L, (190.2 ± 30.4) ng/L vs. (119.8 ± 28.9) ng/L, (159.7 ± 10.5) ng/L vs. (112.3 ± 10.2) ng/L], IL-6 [(145 ± 6) ng/L vs. (119 ± 5) ng/L, (344 ± 19) ng/L vs. (225 ± 22) ng/L, (458 ± 36) ng/L vs. (273 ± 28) ng/L, (949 ± 64) ng/L vs. (328 ± 27) ng/L, (841 ± 61) ng/L vs. (306 ± 6) ng/L, (899 ± 35) ng/L vs. (278 ± 16) ng/L] and total protein in BALF [(320 ± 8) mg/L vs. (290 ± 17) mg/L, (400 ± 7) mg/L vs. (336 ± 9) mg/L, (536 ± 10) mg/L vs. (492 ± 14) mg/L, (806 ± 10) mg/L vs. (608 ± 17) mg/L, (781 ± 17) mg/L vs. (579 ±16) mg/L, (662 ± 24) mg/L vs. (505 ± 9) mg/L] were much lower, and the IL-10 levels [(5.7 ± 0.8) ng/L vs. (11.7 ± 0.9) ng/L, (17.2 ± 1.6) ng/L vs. (31.9 ± 2.6) ng/L, (22.3 ± 2.1) ng/L vs. (54.7 ± 4.8) ng/L, (42.3 ± 4.9) ng/L vs. (80.7 ±1.9) ng/L, (29.7 ± 1.4) ng/L vs. (69.4 ± 3.4) ng/L, (21.4 ± 2.9) ng/L vs. (74.3 ± 5.5) ng/L] were much higher in the ulinastatin group at 0.5, 2, 4, 12, 24, and 72 h (all P〈0.05). The optical microscope showed alveolar wall tissue thickening, mesenchyma hyperemia and edema, inflammatory cellular infiltration and alveolar collapse in the control group, and above pathology changes were significantly alleviated in the ulinastatin group. Conclusion Ulinastatin can protect sepsis rats with ALI through reducing the levels of TNF-α and IL-6, promoting IL-10 levels and thereby inhibiting the neutrophil infiltration and protease expression in the lungs.
出处 《中华危重症医学杂志(电子版)》 CAS CSCD 2017年第3期153-158,共6页 Chinese Journal of Critical Care Medicine:Electronic Edition
基金 浙江省自然基金项目(LY14H150007) 浙江省医药卫生科技计划平台重点项目(2013ZDA001) 浙江省医药卫生重大科技计划项目(WKJ2012-2-020) 2012年浙江省卫生高层次创新人才培养工程 2016年浙江省医学创新学科建设计划项目
关键词 急性肺损伤 脓毒症 乌司他丁 脂多糖类 大鼠 Acute lung injury Sepsis Ulinastatin Lipopolysaccharides Rats
作者简介 通信作者:蔡国龙,Email:caiguolong@126.com
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