法舒地尔对脂多糖诱导的小鼠急性肺损伤的保护作用

目的:探讨Rho激酶抑制剂法舒地尔(fasudil)对脂多糖(lipopolysaccharide,LPS)所致小鼠败血症继发急性肺损伤(acute lung injury,ALI)的保护作用及机制?方法:C57BL/6小鼠随机分为对照(Control)组?LPS模型组?LPS+fasudil(10 mg/kg)组?LPS + 地塞米松(dexamethasone,Dex,5 mg/kg)组?造模后观察不同时间点各组生存率,6 h处死小鼠收集血清?支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)?肺组织,ELISA测定血清中肿瘤坏死因子α(TNF-α)?白细胞介素(IL)-1β?IL-10水平,检测BALF中细胞计数和蛋白浓度,HE染色观察各组肺组织病理改变,湿干重比评估肺含水量,ELISA测定肺组织中性粒细胞髓过氧化物酶(myeloperoxidase,MPO)含量?结果:fasudil可显著改善动物生存率?延长生存时间;缓解肺组织炎性损伤及肺水肿程度,降低MPO含量,下调血清中促炎细胞因子IL-1β?TNF-α水平,上调抗炎细胞因子IL-10表达?结论:fasudil可有效缓解LPS所致的小鼠ALI,其作用可能与减轻受累肺组织炎症反应相关?     

法舒地尔对脂多糖诱导的大鼠急性肺损伤的影响

目的：探讨法舒地尔通过RhoA/ROCK（ Rho激酶）通路是否能减轻脂多糖（ LPS）诱导的大鼠急性肺损伤（ ALI）。方法：18只Wistar健康大鼠随机分为对照组（ NS组）、脂多糖组（ LPS组）及法舒地尔干预组（ FAS组）各6只;LPS组和FAS组采用小剂量LPS 1 mg/kg腹腔注射16 h后,气管内滴注LPS 3 mg/kg建立ALI模型。 FAS组在腹腔注射LPS前30 min和气管滴注LPS后1 h给予腹腔注射法舒地尔10 mg/kg。于气管滴注LPS造模后,观察3 h后处死大鼠,通过HE染色观察各组肺组织形态学改变,测肺组织湿/干重比、丙二醛含量、髓过氧化物酶活性,反转录-聚合酶链反应及Western blot法检测肺组织匀浆中ROCK2（Rho激酶2）mRNA及蛋白的表达情况。结果：与NS组比较,LPS组肺组织病理形态学改变明显,FAS组较LPS组相比明显减轻;LPS组肺湿/干重比、丙二醛含量和髓过氧化物酶活性均较NS组明显增高（P〈0.01）,而FAS组较LPS组均有不同程度降低（P〈0.05-P〈0.01）;LPS组ROCK2 mRNA 表达较NS组明显增高（P〈0.01）,而FAS组与LPS组差异无统计学意义（P〉0.05）;LPS组ROCK2蛋白表达较NS组明显增高（P〈0.01）,而FAS组较LPS组表达水平降低（P〈0.05）。结论：法舒地尔通过RhoA/Rho激酶信号通路能够减轻LPS诱导的大鼠ALI。     

地塞米松对急性肺损伤脂质过氧化物的影响

目的探讨急性肺损伤(ALI)脂质过氧化物(LPO)的变化及地塞米松对ALI的保护作用.方法将30只Wistar大鼠随机分成3组正常对照组,油酸模型组,地塞米松组.地塞米松组在注入油酸前30min腹腔内注入地塞米松2mg/kg.以上各组均在注油酸后4小时采血测LPO,观察肺组织病理形态学变化.结果地塞米松组血浆LPO含量(8.86±2.39μmol/L)与油酸模型组血浆LPO含量(12.18±1.67μmol/L)比较明显降低(P＜0.01).病理组织学观察示地塞米松组肺组织病理改变较油酸模型组减轻.结论地塞米松对油酸至ALI有保护作用,这种保护作用可能与其抑制脂质过氧化反应有关.     

地塞米松对脂多糖致大鼠急性肺损伤的治疗作用

目的:探讨急性肺损伤(Acate lung injury,ALI)发生早期给予地塞米松的治疗作用.方法:大鼠尾静脉注射5mg/kg脂多糖(Lipopolysacharide,LPS),造成ALI模型.于注射LPS 1 h后,腹腔注射地塞米松(10 mg/kg),1 h后采集标本,分别测定血清蛋白含量、肺泡灌洗液(Broncho alveolar lavage fluid,BALF)中蛋白、TNF-α、IL-8、ICAM-1的含量,计算肺通透指数(Lung alveolar permeability index,LPI)、肺湿/干重比,检查肺组织病理学变化情况.实验平行设置生理盐水对照组和LPS损伤组.结果:肺组织病理切片检查表明,LPS组肺间质水肿、出血,大量炎性细胞浸润,而地塞米松组肺组织损伤显著轻于LPS组.地塞米松组肺湿/干重比、BALF中PMN比、LPI均显著低于LPS组(P<0.05),与正常对照组相比没有显著差异.LPS组BALF中TNF-α、IL-8、ICAM-1浓度高于正常对照组(P<0.05),而地塞米松组与对照组相比,差异无统计学意义(P>0.05 ).结论:在ALI发生早期给予大剂量地塞米松,可以减轻肺组织损伤,减少肺组织液渗出和中性粒细胞聚集.     

地塞米松对重症急性胰腺炎肺损伤的防治作用

目的 探讨地塞米松对重症急性胰腺炎(SAP)并发急性肺损伤(ALI)的防治作用.方法 将134例SAP早期出现低氧血症病人随机分为实验组及对照组,实验组一旦发生低氧血症即予地塞米松针剂10 mg每天1次静脉注射,持续3～5 d.2组其他治疗相同.观察2组病人低氧血症持续时间、ALI及急性呼吸窘迫综合征(ARDS)发生率、机械通气使用率与持续时间以及死亡例数、住院时间.结果 实验组及对照组机械通气使用率分别为3.7%(2/54)、16.3%(13/80),机械通气时间分别为(4.5±1.5)d、(6.4±4.4)d,低氧血症持续时间分别为(7.4±3.2)d、(12.1±6.7)d,差异均有统计学意义(P均＜0.05);2组住院天数分别为(14.3±11.2)d、(18.7±15.1)d,差异有统计学意义(P＜0.05);ALI及ARDS发生率、死亡发生率2组差异无统计学意义(P＞0.05).结论 SAP并发低氧血症患者早期使用地塞米松,可降低其机械通气使用几率及减少机械通气时间,并能缩短患者住院时间,对SAP并发ALI具有一定防治作用.     

气管滴注地塞米松对大鼠急性肺损伤的影响

目的 研究气管滴入地塞米松对大鼠急性肺损伤（ALI）的影响.方法 48只SD大鼠随机分为6组：①正常对照组;②ALI组;③ALI气管滴生理盐水组;④ALI气管给药组;⑤ALI腹腔注生理盐水组;⑥ALI腹腔给药组.第②组至第⑥组尾静脉注射LPS15min后,③组、④组分别气管滴生理盐水和地塞米松,⑤组、⑥组分别腹腔注射生理盐水和地塞米松.4h后处死大鼠,用ELISA法测血TNF-α和IL-10;取肺组织作病理学观察并测定湿/干重比.结果 各试验组TNF-α和IL-10均高于正常组（P＜0.05）.给予地塞米松后,TNF-α下降,而IL-10升高（P＜0.01）,这两种变化趋势在气管给药组比腹腔给药组明显（P＜0.05）.结论 ALI早期应用地塞米松可降低TNF-α并增加IL-10表达,缓解炎症.气道局部应用地塞米松能改善ALI大鼠的呼吸功能.     

地塞米松对急性肺损伤早期血管内皮生长因子的影响

目的研究地塞米松对急性肺损伤(ALI)早期血管内皮生长因子(VEGF)变化的影响,为临床治疗提供理论依据。方法雄性新西兰家兔24只,随机分为对照组(N)9只,急性肺损伤组(L)8只,早期干预组(E)7只。建立内毒素ALI模型,E组于建模后一次性给予地塞米松2 mg。结果L组在内毒素注射后血压、心率、pH明显下降;血清及肺泡灌洗液(BALF)中VEGF升高。E组血压、心率降幅减小,VEGF的表达明显被抑制,肺病理改变减轻。结论地塞米松可通过抑制VEGF的表达来改善ALI早期血管通透性。     

地塞米松、生脉注射液对内毒素致急性肺损伤保护作用研究

目的：探讨生脉注射液对内毒素致急性肺损伤(ALI)的保护作用,比较地塞米松、生脉注射液及两者合用对ALI的疗效。方法：用内毒素复制ALI模型,分别给予生脉、地塞米松、生脉 地塞米松注射,2h后检测支气管肺泡灌洗液(BAIF)中白细胞数目、总蛋白,肺湿干重,并计算肺系数、肺湿干重比。结果：内毒素静脉注射造成肺系数、肺湿干重比明显增加,伴有BAIF中白细胞数目,蛋白质含量显著的提高。单独用生脉、地塞米松及合用两者均无明显保护作用,两者合用对蛋白渗出有抑制作用。结论：小剂量生脉、地基米松及两者合用在短期内均无明显抗内毒素致急性肺损伤(ALI)作用,仅对蛋白渗出有抑制作用。     

法舒地尔对小鼠造影剂急性肾损伤的影响

目的 探讨法舒地尔是否可以通过抑制Rho/ROCK信号通路,减轻氧化应激损伤及炎性反应,从而减轻造影剂急性肾损伤的发生。方法 30只小鼠行单侧肾蒂结扎术,术后1周,随机分为模型组、法舒地尔干预组或对照组（n=10/组）。小鼠经尾静脉注射碘克沙醇注射液（4.0g I/kg）或等剂量的生理盐水（对照组）。法舒地尔干预组在注射碘克沙醇前12h、2h以及注射后4h 3个时间点给予法舒地尔（10mg/kg,腹腔注射）。造模后24h检测小鼠血清肾功能标志物、炎症、氧化应激相关蛋白的表达水平。结果 与模型组相比,法舒地尔可以显著的降低血清Cr水平,减少肾组织活性氧簇（ROS）的产生及其诱导的DNA损伤。Wester blot法检测结果显示,法舒地尔可以显著减少炎性细胞因子TNF-α、IL-6蛋白水平（P<0.05）。结论 法舒地尔可以改善造影剂诱导的血清肌酐升高,其肾脏保护作用机制主要是通过抑制Rho/ROCK信号通路,从而发挥抗炎、抗氧化应激作用。     

前列腺素E1脂微球制剂对油酸引起的大鼠急性肺损伤的实验研究

目的 :了解前列腺素E1脂微球制剂 (lipo PGE1)和粉针剂 (PGE1)在油酸引起的大鼠急性肺损伤中的应用价值。方法 :随机将 40只Wistar大鼠分成 4组 :正常组 (A组 )、油酸模型组 (B组 )、PGE1组 (C组 )和lipo PGE1组 (D组 )。于实验 3h时分别测量每只大鼠的肺系数、肺湿重 /肺干重、肺含水率、血浆中的丙二醛(MDA)、红细胞中的过氧化物歧化酶 (SOD)、动脉血气和、肺泡动脉氧分压差 (A aDO2 ) ,并进行统计学分析。结果 :(1 )D组与B组比较 ,肺系数、肺湿重 /肺干重、肺含水率显著减小 (P <0 .0 5 ) ,血浆SOD含量、动脉血PaO2 显著增高 (P <0 .0 5 ) ,血浆MDA含量、A aDO2 显著降低 (P <0 .0 5 )。 (2 )C组与B组比较 ,肺系数、肺湿重 /肺干重、肺含水率显著减小 (P <0 .0 5 ) ,动脉血PaO2 显著提高 (P <0 .0 5 ) ,A aDO2 显著降低 (P <0 .0 5 )。(3 )C组与D组比较 ,前者血浆SOD含量显著增高 (P <0 .0 5 ) ,血浆MDA含量显著降低 (P <0 .0 5 ) ,更接近正常。结论 :前列腺素E1脂微球制对油酸引起的大鼠急性肺损伤有明显的治疗作用 ,在某些方面其效果优于粉针剂型PGE1。     

乌司它丁对油酸致急性肺损伤大鼠肺组织血红素氧化酶-1的影响

目的:探讨乌司他丁对油酸致急性肺损伤大鼠肺组织血红素氧化酶-1表达的影响.方法 30只成年SD大鼠,随机分为3组(n＝10).正常组(A组)经大鼠尾静脉注射0.2mL/kg生理盐水;急性肺损伤组(B组)、乌司他丁组(C组)经大鼠尾静脉注射油酸0.2mL/kg制成急性肺损伤模型,随后立即给予A组、B组腹腔注射生理盐水10mL/kg,C组100ku/kg的乌司他丁腹腔注射.测取动物4h时间点呼吸频率和左心室动脉血氧分压,并于4h后取右下肺组织行HE染色和HO-1免疫组织化学检查,观察光镜下病理改变以及血红素氧化酶-1的表达.结果: 乌司他丁能显著改善油酸所致急性肺损伤所致的呼吸窘迫;肺组织血红素氧化酶-1在对照组仅有少量表达,急性肺损伤组表达增多,乌司他丁干预组表达明显增强.结论:乌司他丁可通过增加肺组织中血红素氧化酶-1的表达而发挥保护作用.     

The Changes of Plasma Endothelin in Oleic Acid-induced Acute Lung Injury and Their Implication

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油酸诱导的急性肺损伤模型肺泡液体清除能力的实验研究

目的 探讨油酸诱导的急性肺损伤模型肺泡内液体的清除能力.方法 清洁级雄性大鼠51只随机分为正常组、急性肺损伤组和特布他林治疗组.油酸静脉注射复制急性肺损伤模型.动脉血气、肺组织病理学检测评估肺损伤程度,电镜下观察急性分离的肺泡Ⅱ型上皮细胞的变化,重力法测定血管外肺水量(EVLWI).结果 急性肺损伤组大鼠肺损伤评分为(6.37±1.26)分、血管外肺水量为(4.02±0.69)mL/g,显著高于正常组[(1.39±0.5)分和(2.73±0.50)mL/g],均P<0.05;特布他林治疗后大鼠肺损伤评分为(5.23±1.14)分,血管外肺水量为(3.50±0.45)mL/g,较急性肺损伤组显著下降(均P<0.05).电镜下观察急性肺损伤组肺泡Ⅱ型上皮细胞形状不规则,染色质边集,线粒体肿胀,板层小体排空及空泡化等;经特布他林治疗后,电镜观察大鼠肺泡Ⅱ型上皮细胞线粒体肿胀程度及板层小体排空程度较急性肺损伤组轻.结论 油酸致急性肺损伤大鼠肺泡液体清除能力下降,特布他林可以减轻肺组织及肺泡Ⅱ型上皮细胞的损伤,提高肺水清除能力.     

丙酮酸乙酯对油酸诱导肺损伤大鼠的早期保护作用

目的:由于缺乏有效、特异性的治疗,急性肺损伤(ALI)/急性呼吸窘迫综合征(ARDS)的病死率居高不下,丙酮酸乙酯作为新的抗炎药物,能拮抗致死性脓毒症和系统性炎性反应.实验观察丙酮酸乙酯对油酸诱导ALI大鼠肺的早期保护作用及其可能的机制,为脂肪栓塞综合征诱导肺损伤提供新的治疗方案. 方法:清洁级雄性SD大鼠18只,随机分为对照组、ALI组和治疗组,每组6只.ALI组大鼠经颈静脉注射油酸0.15 ml/kg,造成肺损伤模型.治疗组大鼠在造模后,腹腔注射丙酮酸乙酯40 mg/kg,4 h后放血处死动物,留取血液标本,用ELISA法测血清肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)、血管假性血友病因(vWF)表达,取肺组织测定肺通透性指数(PPI)、肺血管外肺水量(EVLW)和肺湿质量与干质量比值(W/D).Western blotting检测肺组织丝裂原活化蛋白激酶(ERK1/2、P38和JNK MAPK)磷酸化蛋白表达. 结果:①病理生理表现提示,试验动物造模成功.②与ALI组比较,治疗组大鼠肺组织病理损伤明显减轻.③ALI组PPI、EVWL、W/D显著高于对照组(P<0.01)和治疗组(P<0.01).④ALI组TNF-α、IL-6和vWF血清含量显著高于治疗组(P<0.01)和对照组(P<0.01).⑤与对照组相比,ALI组ERK1/2、P38 MAPK的磷酸化表达显著增加.与ALI组相比,治疗组ERK1/2、P38 MAPK的磷酸化表达明显降低,但仍高于对照组.各组间JNK MAPK磷酸化表达差异无显著性统计学意义. 结论:丙酮酸乙酯明显抑制细胞内信号转导蛋白ERK1/2、P38 MAPK的磷酸化表达,下调TNF-α、IL-6等炎性介质的水平,减少肺微血管清蛋白的通透性,减轻血管内皮细胞的损伤,对油酸诱导的ALI有显著的肺保护作用.     

Total liquid ventilation reduces oleic acid-induced lung injury in piglets

Background Pediatric patients are susceptible to lung injury that does not respond to traditional therapies. Total liquid ventilation has been developed as an alternative ventilatory strategy for severe lung injury. The aim of this study is to investigate the effect of total liquid ventilation on oleic acid （OA）-induced lung injury in piglets. Methods Twelve Chinese immature piglets were induced acute lung injury by OA. Twelve piglets were randomly treated with conventional gas ventilation （control group） or total liquid ventilation （study group） for 240 minutes. Samples for blood gas analysis were collected before, and at 60-minute intervals after OA-induced lung injury. The degree of lung injury was quantified by histologic examination. The inflammatory cells and the levels of IL-1β, IL-6, IL-10 and TNF-α in plasma, tissue and bronchoalveolar lavage were analyzed. Results Neutrophil and macrophage counts in bronchoalveolar lavage were significantly decreased in the study group （P〈0.05）. The total lung injury score was also reduced in the study group （P〈0.05）. The concentrations of IL-1β, IL-6, IL-10 and TNF-α in plasma, tissue and bronchoalveolar lavage were significantly reduced in the study group （P〈0.05）. Conclusions Total liquid ventilation reduces biochemical and histoloaic OA-induced luna iniurv in nialets.     

Atrial natriuretic peptide attenuates inflammatory responses on oleic acid-induced acute lung injury model in rats

Background  An inflammatory response leading to organ dysfunction and failure continues to be a major problem after injury in many clinical conditions such as sepsis, severe burns, and trauma. It is increasingly recognized that atrial natriuretic peptide (ANP) possesses a broad range of biological activities, including effects on endothelial function and inflammation. A recent study has revealed that ANP exerts anti-inflammatory effects. In this study we tested the effects of human ANP (hANP) on lung injury in a model of oleic acid (OA)-induced acute lung injury (ALI) in rats.

Methods  Rats were randomly assigned to three groups (n=6 in each group). Rats in the control group received a 0.9% solution of NaCl (1 ml∙kg^-1∙h^-1) by continuous intravenous infusion, after 30 minutes a 0.9% solution of NaCl (1 ml/kg) was injected intravenously, and then the 0.9% NaCl infusion was restarted. Rats in the ALI group received a 0.9% NaCl solution (1 ml∙kg^-1∙h^-1) intravenous infusion, after 30 minutes OA was injected intravenously (0.1 ml/kg), and then the 0.9% NaCl infusion was restarted. Rats in the hANP-treated ALI group received a hANP (0.1 µg∙kg^-1∙min^-1) infusion, after 30 minutes OA was injected intravenously (0.1 ml/kg), and then the hANP infusion was restarted. The anti-inflammation effects of hANP were evaluated by histological examination and determination of serum cytokine levels.

Results  Serum interleukin (IL)-1β, IL-6, IL-10 and tumor necrosis factor (TNF) α were increased in the ALI group at six hours. The levels of all factors were significantly lower in the hANP treated rats (P <0.005). Similarly, levels of IL-1β, IL-6, IL-10 and TNF-α were higher in the lung tissue in the ALI group at six hours. hANP treatment significantly reduced the levels of these factors in the lungs (P <0.005). Histological examination revealed marked reduction in interstitial congestion, edema, and inflammation.

Conclusion  hANP can attenuate inflammation in an OA-induced lung injury in rat model.

     

Effect of oleic acid-induced acute lung injury and conventional mechanical ventilation on renal function in piglets

Background Animal models that demonstrate changes of renal function in response to acute lung injury (ALI) and mechanical ventilation (MV) are few. The present study was performed to examine the effect of ALI induced by oleic acid (OA) in combination with conventional MV strategy on renal function in piglets.

Methods Twelve Chinese mini-piglets were randomly divided into two groups: the OA group (n=6), animals were ventilated with a conventional MV strategy of 12 ml/kg and suffered an ALI induced by administration of OA, and the control group (n=6), animals were ventilated with a protective MV strategy of 6 ml/kg and received the same amount of sterile saline.

Results Six hours after OA injection a severe lung injury and a mild-moderate degree of renal histopathological injury were seen, while no apparent histological abnormalities were observed in the control group. Although we observed an increase in the plasma concentrations of creatinine and urea after ALI, there was no significant difference compared with the control group. Plasma concentrations of neutrophil gelatinase-associated lipocalin (NGAL) and cystatin C increased (5.6±1.3) and (7.4±1.5) times in the OA group compared to baseline values, and were significantly higher than the values in the control group. OA injection in combination with conventional MV strategy resulted in a dramatic aggravation of hemodynamic and blood gas exchange parameters, while these parameters remained stable during the experiment in the control group. The plasma expression of TNF-α and IL-6 in the OA group were significantly higher than that in the control group. Compared with high expression in the lung and renal tissue in the OA group, TNF-α and IL-6 were too low to be detected in the lung and renal tissue in the control group.

Conclusions OA injection in combination with conventional MV strategy not only resulted in a severe lung injury but also an apparent renal injury. The potential mechanisms involved a cytokine response of TNF-α and IL-6 in plasma, lung and renal tissues.

     

Effect of endogenous hydrogen sulfide on oxidative stress in oleic acid-induced acute lung injury in rats

Background  Acute lung injury (ALI) is a common critical disease in emergency care. Oxidative stress plays an important role in the pathogenesis of ALI. Endogenous hydrogen sulfide (H₂S) can inhibit oxidative stress in rat gastric mucosal epithelium. In this study, we examined the possible role of H₂S in regulation of the oxidative stress in oleic acid-induced acute lung injury in rats.

Methods  The rat model of ALI was induced by intra-tail vein injection of oleic acid (OA). NaHS solution was injected intraperitoneally before OA injection as an OA+NaHS group. A semi-quantitative histological index of quantitative assessment of lung injury was calculated. The levels of superoxide dismutase (SOD), glutathione (GSH) and malondialdehyde (MDA) in plasma and lung tissue were detected with ELISA. The levels of H₂S content in lung tissue were detected with an ion meter.

Results  Compared with the control group, the level of H₂S in lung tissue was significantly decreased, and the level of SOD and GSH were decreased but the level of MDA was increased in plasma and lung tissue in rats with ALI. NaHS lessened the ALI in association with an increase in the level of H₂S in lung tissue, a decrease in the level of MDA but an increase in SOD and GSH levels in plasma and lung tissues.

Conclusion  Endogenous H₂S could inhibit the oxidative stress in lung tissue in oleic acid-induced acute lung injury in rats.

     

Effects of low potassium dextran glucose solution on oleic acid-induced acute lung injury in juvenile piglets

Background  Epithelial dysfunction in lungs plays a key role in the pathogenesis of acute lung injury. The beneficial effects of low potassium dextran glucose solution (LPD) have been reported in lung preservation, and LPD enables injured alveolar pneumocytes to recover. So we hypothesized that systemic administration of LPD may have benefits in treating acute lung injury. We investigated the effects of LPD on arterial blood gas and levels of some cytokines in oleic acid-induced acute lung injury in juvenile piglets.

Methods  Oleic acid (0.1 ml/kg) was intrapulmonarily administered to healthy anesthetized juvenile piglets. Ten animals were randomly assigned to two groups (n=5 each): oleic acid-induced group (control group) with intravenous infusion of 12.5 ml/kg of lactated Ringer’s solution 30 minutes before administration of oleic acid and LPD group with systemic administration of LPD (12.5 ml/kg) 30 minutes before injecting oleic acid. Blood gas variables and concentrations of tumor necrosis factor alpha, endothelin 1 and interleukin 10 were measured before and every 1 hour for 6 hours after initial lung injury.

Results  Compared with control group, blood pH, partial pressure of arterial oxygen to fraction of inspired oxygen ratio, partial pressure of arterial carbon dioxide, and mean pulmonary arterial pressure in LPD group were improved (P <0.05 or 0.01). Six hours after lung injury, concentration of tumor necrosis factor alpha in lung tissue was lower in LPD group than control group (P <0.05). Plasmic concentration of endothelin 1 showed lower in LPD group while plasmic concentration of interleukin 10 showed higher in LPD group (P <0.05).

Conclusions  Before lung injury, systemic administration of LPD can improve gas exchange, attenuate pulmonary hypertension, decrease plasmic levels of endothelin 1, increase interleukin 10 and decrease concentration of tumor necrosis factor alpha in lung tissue in oleic acid-induced acute lung injury in juvenile piglets.