Effects of an endogenous nitric oxide synthase inhibitor on phorbol myristate acetate-induced acute lung injury in rats

1. In the present study, we determined whether the endogenous nitric oxide (NO) synthase (NOS) inhibitor Nomega-nitro-l-arginine methyl ester (l-NAME) could ameliorate the acute lung injury (ALI) induced by phorbol myristate acetate (PMA) in rat isolated lung. 2. Typical ALI was induced successfully by PMA during 60 min of observation. At 2 micro g/kg, PMA elicited a significant increase in microvascular permeability (measured using the capillary filtration coefficient Kfc), lung weight gain, lung weight/bodyweight ratio, pulmonary arterial pressure (PAP) and protein concentration of bronchoalveolar lavage fluid. 3. Pretreatment with the NOS inhibitor l-NAME (5 mmol/L) significantly attenuated ALI. None of the parameters reflective of lung injury showed significant increase, except for PAP (P < 0.001). The addition of l-arginine (4 mmol/L) blocked the protective effective of l-NAME. Pretreatment with l-arginine exacerbated PMA-induced lung injury. 4. These data suggest that l-NAME significantly ameliorates ALI induced by PMA in rats, indicating that endogenous NO plays a key role in the development of lung oedema in PMA-induced lung injury.     

Kaempferol regulates MAPKs and NF-κB signaling pathways to attenuate LPS-induced acute lung injury in mice

Recent studies show that mitogen-activated protein kinases (MAPKs) and nuclear factor-kappa B (NF-κB) signaling pathways are two pivotal roles contributing to the development of lipopolysaccharide (LPS)-induced acute lung injury (ALI). The present study aimed to investigate the protective effect of kaempferol (Kae), a naturally occurring flavonoid compound, on ALI and explore its possible mechanisms. Male BALB/c mice with ALI, induced by intranasal instillation of LPS, were treated or not with Kae (100mg/kg, intragastrically) 1h prior to LPS exposure. Kae treatment attenuated pulmonary edema of mice with ALI after LPS challenge, as it markedly decreased the lung W/D ratio of lung samples, protein concentration and the amounts of inflammatory cells in BALF. Similarly, LPS mediated overproduction of proinflammatory cytokines in BALF, including TNF-α, IL-1β and IL-6, was strongly reduced by Kae. Histological studies demonstrated that Kae substantially inhibited LPS-induced alveolar wall thickness, alveolar hemorrhage and leukocytes infiltration in lung tissue with evidence of reduced myeloperoxidase (MPO) activity. Kae also efficiently increased superoxide dismutase (SOD) activity of lung sample when compared with LPS group, which was obviously reduced by LPS administration. In addition, Western blot analysis indicated that the activation of MAPKs and NF-κB signaling pathways stimulated by LPS was significantly blocked by Kae. Taken together, our results suggest that Kae exhibits a protective effect on LPS-induced ALI via suppression of MAPKs and NF-κB signaling pathways, which may involve the inhibition of tissue oxidative injury and pulmonary inflammatory process.     

Acute lung inflammation in rats induced by phorbol myristate acetate (PMA)

Intratracheal administration of PMA produces acute lung injury in part due to the generation of O2-derived free radicals. This study evaluated the role of the antioxidant enzyme superoxide dismutase (SOD) in PMA-induced lung injury in the rat. PMA was instilled into rats intratracheally (20-60 micrograms/kg), and the lungs were lavaged 4 hr later. Total number of cells recovered from lavage after PMA treatment was not different from the total number recovered from controls; lavagable PMNs increased in a dose-dependent manner. Albumin in lavage fluid (an index of lung vascular permeability) was significantly increased at 60 micrograms/kg PMA. SOD (10,000 U) + PMA (60 micrograms/kg) reduced the albumin level but significantly increased both total number of cells and number of PMNs recovered from lavage fluid. To investigate the possibility that SOD decreases the ability of PMNs to adhere, PMN aggregation was measured in vitro. The results indicated that 10,000 U SOD can inhibit PMA-induced aggregation by 50%. In contrast, aggregation to other stimuli (e.g., fMet-Leu-Phe, A23187) was unaffected by SOD. We conclude SOD prevents PMA-induced lung permeability and diminishes PMN adherence.     

Protective effect of hydroxysafflor yellow A against acute lung injury induced by oleic acid and lipopolysaccharide in rats

This study is to investigate the pharmacological effect and mechanism of action of hydroxysafflor yellow A (HSYA) on acute lung injury (ALI). The rat ALI was induced by oleic acid and lipopolysaccharide (LPS) injection. The incidence of acidosis, PaO2 (arterial blood oxygen pressure), W/D (wet weight/dry weight) and lung index (LI) were measured. Electron microscope and optical microscope were applied to observe lung morphological changes in rat. RT-PCR was used to determine TNF-alpha and ICAM-1 mRNA level. Inhibition effect of HSYA on plasma inflammatory cytokine expression was measured by ELISA. HSYA could alleviate pulmonary edema, reduce acidosis, keep PaO2 from descending, inhibit inflammatory cell infiltration, inhibit rat lung TNF-alpha and ICAM-1 mRNA expression and plasma IL-6 and IL-1beta level elevation. HSYA is an effective ingredient to remit ALI induced by oleic acid and LPS in rat.     

Protective effects of intranasal curcumin on paraquot induced acute lung injury (ALI) in mice

Paraquot (PQ) is widely and commonly used as herbicide and has been reported to be hazardous as it causes lung injury. However, molecular mechanism underlying lung toxicity caused by PQ has not been elucidated. Curcumin, a known anti-inflammatory molecule derived from rhizomes of Curcuma longa has variety of pharmacological activities including free-radical scavenging properties but the protective effects of curcumin on PQ-induced acute lung injury (ALI) have not been studied. In this study, we aimed to study the effects of curcumin on ALI caused by PQ in male parke's strain mice which were challenged acutely by PQ (50 mg/kg, i.p.) with or without curcumin an hour before (5 mg/kg, i.n.) PQ intoxication. Lung specimens and the bronchoalveolar lavage fluid (BALF) were isolated for pathological and biochemical analysis after 48 h of PQ exposure. Curcumin administration has significantly enhanced superoxide dismutase (SOD) and catalase activities. Lung wet/dry weight ratio, malondialdehyde (MDA) and lactate dehydrogenase (LDH) content, total cell number and myeloperoxidase (MPO) levels in BALF as well as neutrophil infiltration were attenuated by curcumin. Pathological studies also revealed that intranasal curcumin alleviate PQ-induced pulmonary damage and pro-inflammatory cytokine levels like tumor necrosis factor-α (TNF-α) and nitric oxide (NO). These results suggest that intranasal curcumin may directly target lungs and curcumin inhalers may prove to be effective in PQ-induced ALI treatment in near future.     

Phorbol myristate acetate produces injury to isolated rat lungs in the presence and absence of perfused neutrophils

Because lung injury induced by phorbol myristate acetate (PMA) has been reported by some to be mediated by blood neutrophils (PMN) and by others to occur independently of PMN, we examined the PMN dependency of PMA-induced injury in isolated, perfused lungs of rats. Depending on dose, PMA added to medium perfusing isolated rat lungs produced injury in the presence or in the absence of added PMN. When a high concentration of PMA (57 ng/ml) was added to medium devoid of added PMN, perfusion pressure and lung weight increased. Superoxide dismutase (500 U/ml) and catalase (400 U/ml) added to the medium prior to PMA had no effect on the increases in lung weight or perfusion pressure. When a concentration of PMA (21 ng/ml or less) that did not by itself cause lungs to accumulate fluid was added to perfusion medium containing PMN (1 X 10(8)), superoxide was produced, perfusion pressure increased, and lungs accumulated fluid. Addition of superoxide dismutase and catalase to this preparation prevented the increase in lung weight, but not the increase in perfusion pressure. We conclude that high concentrations of PMA produce lung injury which is independent of neutrophils and oxygen radicals and that lower concentrations produce injury which is neutrophil-dependent and mediated by oxygen radicals. These results may explain why PMA-induced lung injury has variously been reported to be PMN-dependent in some systems and PMN-independent in others.     

甘草酸单铵对脂多糖致小鼠急性肺损伤的保护作用

采用脂多糖(lipopolysaccharide，LPS)气道滴入诱导小鼠急性肺损伤(acute lung injury，ALI)模型，研究甘草酸单铵(monoammonium glycyrrhizinate，MAG)对ALI的防治作用及其机制。雄性ICR小鼠随机分为生理盐水(NS)对照组、MAG 3、10 及30 mg·kg^-1组、LPS组、地塞米松(dexamethasone，DXM) 5 mg·kg^-1组。MAG各组气道滴入LPS前1 h及滴入后3 h各给药1次，DXM组气道滴入LPS前1 h给药1次。LPS气道滴入后6 h处死动物，测定各组的肺湿重/干重比、肺通透性、肺组织中性粒细胞髓过氧化物酶(myeloperoxidase，MPO)含量、ELISA法检测肺组织匀浆TNF-α、IL-10含量，常规细胞形态学检测中性粒细胞在支气管肺泡灌洗液(bronchoalveolar lavage fluid，BALF)中的比例和肺组织病理改变。结果表明，MAG剂量依赖性减轻气道内滴入LPS诱导的小鼠ALI程度，降低肺湿重/干重比及肺组织伊文斯蓝的渗出，降低BALF中白细胞总数和中性粒细胞数比例，抑制组织MPO的释放，降低肺组织匀浆TNF-α的含量，增加肺组织IL-10的释放。以上结果提示，MAG可能通过调节TNF-α/IL-10的平衡而有效保护脂多糖诱导的急性肺损伤。     

Preventive effect of tranilast on oleic acid-induced lung injury in guinea pigs

Acute respiratory distress syndrome or acute lung injury (ARDS)/(ALI) involve the severe lung injury with pulmonary vascular hyper-permeability and hypoxemia induced by inflammatory reactions. Since ARDS/ALI carries high mortality, the development of new drugs against ARDS/ALI is required. We examined the effect of tranilast, an anti-allergic drug, on vascular hyper-permeability in the lungs and airways, and on hypoxemia, in oleic acid (OA)-induced acute lung injury, an animal model of ARDS/ALI. The increase in pulmonary and airway vascular permeability and the decrease in partial oxygen pressure of arterial blood induced by an intravenous injection of OA were drastically ameliorated by the oral administration of tranilast in a dose-dependent manner. This is the first report to prove that tranilast prevents pulmonary and airway vascular permeability and hypoxemia induced by OA. These results suggest that tranilast may be a candidate drug for the treatment of ARDS/ALI.     

番茄红素对大鼠肺缺血再灌注损伤的保护作用研究

目的研究番茄红素对大鼠肺缺血再灌注损伤的保护作用,并考察其作用机制。方法取120只SD大鼠随机分为假手术组、模型组、舒血宁注射液(4 mg/kg)组以及番茄红素5、10、20 mg/kg组,每组20只。除假手术组外采用夹闭左肺门45 min后松夹的方法制备大鼠肺缺血再灌注损伤模型。再灌注2 h后,分别测定各组大鼠肺组织湿质量/干质量比值;通过苏木精–尹红(HE)染色观察肺组织病理学改变;原位末端标记(TUNEL)法观察肺组织细胞凋亡并计算凋亡指数(AI);检测血清中丙二醛(MDA)含量和髓过氧化物酶(MPO)活性;测定肺组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)活性。结果与模型组比较,番茄红素10、20 mg/kg组肺组织湿质量/干质量比值显著降低(P0.05、0.01),肺组织病变显著改善,肺组织细胞凋亡状况明显改善;血清中MDA含量和MPO活性显著降低(P0.05、0.01),肺组织中SOD、CAT活性显著升高(P0.05、0.01)。其中番茄红素20 mg/kg组对肺缺血再灌注损伤大鼠肺组织病变改善最为显著、细胞凋亡状况改善以及凋亡指数降低效果最为显著,对血清中MDA含量和MPO活性显著降低效果更加显著、肺组织中GSH-Px活性显著升高(P0.01)。结论番茄红素能够有效降低肺组织湿质量/干质量比值,改善肺组织病变,抑制肺组织细胞凋亡、降低凋亡指数,提示番茄红素对大鼠肺缺血再灌注损伤具有剂量相关性的保护作用,其作用机制可能与番茄红素能够有效改善机体抗氧化酶活性、抑制氧化应激损伤有关。     

围麻醉期急性肺损伤不同干预方法的效果观察

目的 评价不同干预方法对于控制围麻醉期急性肺损伤(ALI)的发生、发展的临床效果及意义.方法 69例在术中确诊为ALI的患者随机分为传统通气治疗组(n=17)、传统通气复合小剂量乌司他丁治疗组(n=24)、肺保护性通气复合大剂量乌司他丁治疗组(n=28),比较三组患者呼吸力学、动脉血气及血流动力学的变化.结果 肺保护性通气复合大剂量乌司他丁治疗组对ALI患者的呼吸力学、动脉血气、肺氧合的改善明显优于其余两组(P＜0.05),并且未发现机械通气相关性肺损伤;其余两组相比较:在呼吸力学、动脉血气、肺氧合变化差异无统计学意义(P＞0.05),两组均发生了机械通气相关性肺损伤;此外,三组在血流动力学的比较差异无统计学意义(P＞0.05).结论 肺保护性通气复合大剂量乌司他丁治疗能有效地改善ALI患者的肺氧合、呼吸力学、动脉血气变化;减少机械通气相关性肺损伤(VILI)的发生;在临床上应该有预见性的应用.     

Luteolin attenuates the pulmonary inflammatory response involves abilities of antioxidation and inhibition of MAPK and NFκB pathways in mice with endotoxin-induced acute lung injury

Acute lung injury (ALI) in critically ill patients remains the leading cause of mortality and morbidity. Lipopolysaccharide (LPS) is a key mediator of lung injury. This study investigates the protective effects and mechanisms of luteolin in intratracheal instillation of LPS (100 μg)-induced ALI in mice. Pretreatment of mice with 70 μmol/kg luteolin significantly restores LPS-induced decrease in oxygen pressure and increase in carbon dioxide in arterial blood. The histopathological study established 70 μmol/kg luteolin pretreatment markedly attenuates lung histopathological changes, such as haemorrhaging, interstitial edema, and infiltration of polymorphonuclear neutrophils (PMNs) into the lung parenchyma and alveolar spaces. Sufficient evidence for luteolin (35 and 70 μmol/kg) suppresses activation and infiltration of PMNs is obtained in expression of surface marker CD11b and Ly6G on cells in bronchoalveolar lavage fluid (BALF) cells and myeloperoxidase activity in lung tissue. Furthermore, luteolin reduces the activity of catalase and superoxide dismutase, and the level of oxidative damage, and lipid peroxidation, in lung tissue. In addition, the secretion of TNF-α, KC, and ICAM-1 in the BALF after LPS challenge are also inhibited by luteolin. Moreover, luteolin reduced LPS-induced activation of MAPK and NFκB pathways. Therefore, luteolin is a potential protective antagonists for LPS-induced ALI in mice.     

Protective effects of pravastatin in murine lipopolysaccharide-induced acute lung injury

1. The present study was designed to determine whether pravastatin, a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor, could attenuate acute lung injury (ALI) induced by lipopolysaccharide (LPS) in BALB/c mice. 2. Acute lung injury was induced successfully by intratracheal administraiton of LPS (3 microg/g) in BALB/c mice. Pravastatin (3, 10 and 30 mg/kg, i.p.) was administered to mice 24 h prior to and then again concomitant with LPS exposure. 3. Challenge with LPS alone produced a significant increase in lung index and the wet/dry weight ratio compared with control animals. Pulmonary microvascular leakage, as indicated by albumin content in the bronchoalveolar lavage fluid (BALF) and extravasation of Evans blue dye albumin into lung tissue, was apparently increased in LPS-exposed mice. Lipopolysaccharide exposure also produced a significant lung inflammatory response, reflected by myeloperoxidase activity and inflammatory cell counts in BALF. Furthermore, histological examination showed that mice exposed to LPS also exhibited prominent inflammatory cell infiltration and occasional alveolar haemorrhage. 4. Pravastatin (3, 10 or 30 mg/kg, i.p.) produced a significant reduction in multiple indices of LPS-induced pulmonary vascular leak and inflammatory cell infiltration into lung tissue. Elevated tumour necrosis factor (TNF)-alpha levels in lung tissue homogenates of ALI mice were significantly decreased after administration of 10 or 30 mg/kg pravastatin. 5. These findings confirm significant protection by pravastatin against LPS-induced lung vascular leak and inflammation and implicate a potential role for statins in the management of ALI. The inhibitory effect of pravastatin was associated with its effect in decreasing TNF-alpha.     

Mechanistic target of rapamycin-mediated autophagy is involved in the alleviation of lipopolysaccharide-induced acute lung injury in rats

Acute lung injury (ALI) is a complex clinical syndrome with high morbidity and mortality rates. Autophagy is an adaptive process that plays a complex role in ALI. The aim of this study was to investigate the effects of autophagy on lipopolysaccharide (LPS)-induced lung injury by establishing a rat ALI model and to further explore the possible mechanisms involved. Rats were pretreated with the autophagy inhibitor 3-methyladenine (3-MA) or the autophagy activator rapamycin before they were challenged with the intratracheal instillation of LPS (5 mg/kg). The level of autophagy in the lung tissue was detected. Lung injury and vascular permeability were assessed. The role of the mechanistic target of rapamycin (mTOR)-mediated Unc-51-like kinase 1 (ULK1) and the class III PI3 kinase VPS34 in autophagy regulation was examined. LPS challenge induced autophagy and rapamycin pretreatment enhanced autophagy activity in LPS-induced ALI rats. LPS caused severe lung injury and high pulmonary vascular permeability, which could be alleviated by enhancing autophagy. In addition, the inhibition of mTOR upregulated the expression of ULK1 and VPS34 and thus increased LPS-induced autophagy. Autophagy plays a protective role in LPS-induced ALI, and enhancing autophagy via the inhibition of mTOR alleviates lung injury and pulmonary barrier function. Moreover, mTOR negatively mediates ULK1 and VPS34 to regulate LPS-induced autophagy in rats.     

葛根素对油酸致急性肺损伤大鼠的保护作用

目的探讨葛根素对油酸致急性肺损伤大鼠的保护作用。方法24只健康雄性SD大鼠,完全随机分为5组：正常对照组,油酸组和葛根素干预组,各8只。通过静脉注射油酸建立大鼠急性肺损伤模型。正常对照组：大鼠静脉注射0．9％氯化钠溶液0．1ml／kg;油酸组：大鼠静脉注射油酸0．1ml／kg;葛根素干预组：大鼠在注射油酸前30min腹腔注射葛根素30mg／kg。光镜下观察大鼠肺组织形态学改变;检测血清中肿瘤坏死因子α（TNF-α）含量,肺组织中超氧化物歧化酶（SOD）活性和丙二醛含量。结果肺组织形态学变化提示葛根素干预组大鼠肺组织炎症反应较油酸组减轻。油酸组和葛概素干预组均较正常对照组大鼠血清中TNF—α含量增加、肺组织中SOD活性降低、丙二醛含量增加[分别为（41．7±3．4）、（19．0±1．3）ng／L比（5．8±0．8）ng／L;（78±6）、（93±7）U／mg比（113±9）U／mg;（11．89±0．64）、（7．87±0．81）μmol／g比（2．49±0．28）μmol／g]（均P〈0．05）;但葛根素干预组上述3项指标均优于油酸组（均P〈0．05）。结论葛根素对油酸致急性肺损伤大鼠具有一定的保护作用,其机制可能与提高大鼠抗氧化能力、降低血清中TNF—α含量有关。     

脂多糖致急性肺损伤后Bax/Bcl-2变化

目的观察脂多糖(LPS)致大鼠急性肺损伤(ALI)后大鼠肺泡上皮细胞凋亡情况。方法雄性Wistar大鼠200~250g60只,随机分为两组,分别为对照组和LPS组,每组30只。各组分别注射0·9%氯化钠(NS)或LPS5mg/kg4h后观察呼吸频率,行动脉血气分析;致死后检测肺组织湿/干(W/D)比值,检测肺泡上皮细胞B-细胞淋巴瘤/白血病-2(Bcl-2)、Bcl-2相关X蛋白(Bax)表达。结果LPS组呼吸频率[(108±77)次/min]较对照组[(71±5)次/min]显著增快,且有明显的肺水肿和低氧血症。LPS组Bax蛋白表达阳性细胞率[(6·27±0·84)%]与对照组[(0·48±0·52)%]相比显著增高,Bcl-2蛋白表达阳性细胞率与对照组比较差异无统计学意义。结论促进细胞凋亡的Bax蛋白表达细胞显著增多,使Bax/Bcl-2细胞比例明显增加,可能参与了LPS诱发的ALI的发病机制。     

DATS对LPS诱导ALI小鼠抗氧化功能及ICAM-1表达的影响

目的探讨二烯丙基三硫(DATS)对脂多糖(LPS)诱导急性肺损伤(ALI)小鼠抗氧化功能及细胞间黏附分子-1(ICAM-1)的影响。方法腹腔注射LPS复制小鼠ALI模型,实验动物随机分为生理盐水对照组、ALI组、DATS预防组、DATS治疗组。测定肺系数、肺组织湿/干重量比值(W/D),以及肺组织丙二醛(MDA)含量、髓过氧化物酶(MPO)活性、超氧化物歧化酶(SOD)活性、总抗氧化能力(T-AOC)活性及ICAM-1的表达。结果 ALI组肺系数、肺组织W/D明显升高,肺组织MDA含量增加,MPO活性升高、SOD活性及T-AOC活性降低,ICAM-1表达增加;预防性应用DATS可减轻肺水肿,减少MDA生成,降低MPO活性、增加SOD活性及T-AOC活性,并使ICAM-1表达减少。DATS治疗组与ALI组相比,各指标均无明显变化。结论预防性应用DATS对LPS诱导的ALI小鼠可发挥抗氧化作用,减轻肺损伤程度。     

ODN2088减轻线粒体DNA致脓毒症大鼠急性肺损伤

目的:探讨血浆线粒体DNA(mtDNA)含量与脓毒症大鼠急性肺损伤(ALI)程度的关系及选择性TLR9受体抑制剂ODN2088对脓毒症大鼠ALI的保护作用.方法:按随机数表法将80只大鼠分为假手术(sham)组、脓毒症(sepsis)组、脓毒症大鼠腹腔注射mtDNA 1.4 mg/kg(sepsis+mtDNA)组、脓...     

Apocynin ameliorates endotoxin-induced acute lung injury in rats

Acute lung injury (ALI) is a serious clinical syndrome with a high rate of mortality. In this study, the effects of apocynin, a NADPH-oxidase (NOX) inhibitor on lipopolysaccharide (LPS)-induced ALI in rats were investigated. Male Sprague–Dawley rats were treated with apocynin (10 mg/kg) intraperitoneally (i.p.) 1 h before LPS injection (10 mg/kg, i.p.). The results revealed that apocynin attenuated LPS-induced ALI as it decreased total protein content, lactate dehydrogenase (LDH) activity and the accumulation of the inflammatory cells in the bronchoalveolar lavage fluid (BALF), In addition, apocynin significantly increased superoxide dismutase (SOD) and reduced glutathione (GSH) activities with significant decrease in the lung malondialdehyde (MDA) content as compared to LPS group in lung tissue and decreased pulmonary artery contraction induced by LPS. It also upregulated mRNA expression of inhibitory protein kappaB-alpha (NFκBia) and downregulated mRNA expression of Toll-Like receptor 4 (TLR4) and decreased inflammation observed in lung tissues.Collectively, these results demonstrate the protective effects of apocynin against the LPS-induced ALI in rats through its antioxidant and antiinflammatory effect that may be attributed to the decrease in mRNA expression of TLR4 and increasing that of NFκBia.     

脓毒症大鼠急性肺损伤血清IL-6、IL-17的变化及其意义

目的：研究脓毒症大鼠急性肺损伤（ALI）血清IL-6、IL-17水平,以探讨IL-6和IL—17与ALI的关系及可能机制。方法：SD雄性大鼠20只随机分为对照组和模型组各10只。静脉注射脂多糖（6mg／kg）复制ALI的动物模型,观察12h后活杀。测定肺湿／干重比,石蜡包埋切片HE染色行肺组织病理评分,用ELISA法检测血清IL-6、IL-17水平。结果：与对照组相比,模型组肺影干重比为（5．505&#177;0．237）、肺组织病理评分（2．579&#177;0．146）、血清IL-6水平[（1501．511&#177;402．401）pg／mL]、IL-17水平[（49．830&#177;11．464）pg/mL]均明显增高,t值分别是11．356、32．769、43．875、112．674,P均〈0．05。血清IL-6、IL-17水平与肺病理组织评分相关系数及P值分别为r=0．7168,P=0．0004;r=0．937,P〈0．0001。肺组织损伤程度与血清IL-6和IL—17水平呈正相关。结论：IL—17可能参与了脓毒症所致的肺损伤过程。