姜黄素对哮喘小鼠气道炎症和肺内诱导型一氧化氮合酶的影响

目的探讨姜黄素对哮喘小鼠气道炎症和肺内诱导型一氧化氮合酶的影响。方法36只BALB/c小鼠随机分为对照组、哮喘组和姜黄素组,用卵蛋白作为致敏原制备哮喘小鼠模型,对支气管肺泡灌洗液(BALF)细胞总数及嗜酸性粒细胞计数,硝酸还原酶法检测肺组织iNOS活性及NO含量,免疫组织化学和Western blot方法检测大鼠支气管上皮细胞iNOS蛋白表达,双抗体夹心法检测肺组织白细胞介素-4(IL-4)及干扰素-γ(IFN-γ)的表达水平。结果姜黄素干预可显著降低哮喘小鼠BALF中细胞总数及嗜酸粒细胞计数与肺组织iNOS活性及NO含量,减轻炎症反应。免疫组织化学和Western blot结果显示,姜黄素组小鼠支气管上皮细胞iNOS蛋白表达显著低于哮喘小鼠(P0.01)。结论姜黄素可降低哮喘小鼠气道炎症及iNOS表达水平,提示姜黄素对于哮喘可能有潜在的治疗作用。     

全氟辛酸暴露对哮喘小鼠炎症介质IL-4和IFN-γ及糖皮质激素受体的影响

目的:研究全氟辛酸(PFOA)对哮喘小鼠气道炎症、外周血炎症介质白细胞介素4(IL-4)和干扰素γ(IFN-γ)以及肺组织糖皮质激素受体(GR)表达的影响及其可能机制。方法:30只BALB/c小鼠随机分为正常对照(C)组、哮喘模型(A)组、哮喘+PFOA低剂量(AP10)组、哮喘+PFOA中剂量(AP50)组和哮喘+PFOA高剂量(AP100)组,根据不同分组分别制作哮喘模型及PFOA暴露模型。留取肺组织标本后进行HE染色,透射电镜标本制作,ELISA法检测外周血IL-4及IFN-γ水平,并以Western blot及免疫组织化学染色法检测肺组织GR的蛋白表达。结果:肺组织病理切片HE染色结果显示,与正常小鼠相比,哮喘小鼠气道及血管周围可见明显的炎症细胞浸润及黏液分泌,AP各组表现更为明显。透射电镜结果显示,哮喘小鼠肺组织超微结构破坏明显。ELISA检测血清炎症因子结果表明,与C组相比,A组及AP各组外周血炎症因子IL-4升高,IFN-γ明显降低(P0.05);与A组相比,AP10组及AP50组无明显差异,而AP100组外周血炎症因子IL-4升高,IFN-γ明显降低(P0.05)。Western blot结果显示哮喘小鼠肺组织GR表达较正常小鼠降低(P0.05),而A组与AP各组之间无显著差异。免疫组化结果提示GR蛋白主要表达于小鼠肺组织支气管柱状上皮细胞、气道平滑肌细胞及血管平滑肌细胞胞浆。结论:哮喘小鼠气道PFOA急性暴露可通过诱导Th2型免疫反应加剧肺部炎症,促进气道及血管周围的炎症细胞浸润并破坏肺组织超微结构,且与剂量相关。     

BCG对哮喘小鼠气道炎症反应的影响

目的：探讨卡介苗(BCG)对卯蛋白(OVA)致敏小鼠肺组织中T细胞的在体调节及其对气道炎症的作用。方法：将30只BALB／c小鼠分为3组，第1组吸入雾化的OVA(1次／(1．20min／次，连续10d)，建立致敏模型。第2组(对照)吸入雾化的生理盐水(时间和次数同第1组)；第3组(治疗组)于致敏前10d及14d，各皮内注射BCG 1次，致敏后6d吸入雾化的纯蛋白衍生物(PPD)。用SABC免疫组化法，检测肺组织中CD4^ 、CD8^ 及IFN—γ^ 细胞的变化，以及肺组织和支气管肺泡灌洗液(BALF)中炎性细咆的变化。结果：OVA致敏组小鼠肺组织中CD4^ T细胞增加，CD8^ T细胞无明显变化，主要表现为IFN—γ^-／CD4^ T细胞数的增加，IFN—γ^ ／CD4^ 细胞的比例降低。BCG治疗后，肺组织中CD4^ T细胞减少，CD8^ T细胞数大量增加；IFN—γ^ ／CD4^ 细胞的比例明显增大；BALF中炎性细胞数减少。结论：BCG可在体上调Th1细胞，减轻实验性哮喘动物气道的炎症反应。     

褪黑素促进哮喘小鼠肺组织STAT4的表达及抑制气道炎症

目的 探讨褪黑素(MT)对哮喘小鼠肺组织信号传导子和转录激活子4(STAT4)表达的影响及其在气道炎症中的作用.方法 最后1次雾化激发后1 h行左肺支气管肺泡灌洗计数炎性细胞;免疫组织化学和实时定量PCR分别检测右肺组织STAT4蛋白及其mRNA的表达;酶联免疫吸附试验检测外周血IL-12水平.结果 (1)模型组小鼠支气管肺泡灌洗液(BALF)中炎性细胞总数和EOS较对照组明显增多,肺组织STAT4蛋白及其mRNA表达较对照组明显降低;MT组以上指标均得到明显缓解(P<0.01);(2)哮喘小鼠STAT4蛋白及其mRNA的表达均与BALF中EOS呈高度负相关(r=-0.754,r=-0.755;P<0.01),外周血IL-12水平与STAT4蛋白表达呈高度正相关(r=0.742,P<0.01).结论 MT能通过诱导哮喘小鼠肺组织STAT4基因的转录、翻译,促进外周血IL-12产生,抑制EOS等炎性细胞浸润,显著抑制气道炎症.     

雷公藤内酯醇对实验性哮喘小鼠气道炎症反应的影响

目的探讨雷公藤内酯醇对支气管哮喘小鼠血浆IgE、BALF中炎症因子、BALF液中细胞总数及细胞分类变化以及肺组织病理变化的影响,评估该药物对支气管哮喘小鼠气道炎症反应及气道重塑干预过程可能的机制及作用,明确雷公藤内酯醇对支气管哮喘小鼠的临床应用价值。方法 40只Balb/c雌性小鼠分为模型组、正常组、低剂量TP治疗组、高剂量TP治疗组,用OVA致敏的方法建立哮喘模型;低剂量组、高剂量按100μg/kg、200μg/kg腹腔注射TP溶液。检测各组小鼠肺组织病理改变、血浆IgE、BALF中炎症细胞、炎症因子表达情况。结果运用TP治疗的小鼠其支气管周围和血管周围炎症浸润程度减轻,TP可抑制血浆IgE水平,减少BALF中的炎症细胞数及其比例和炎症因子的上升。结论推测TP可能通过降低血浆IgE水平,减轻相应炎症因子及减少气道炎性细胞的浸润,尤其是对Eos的抑制效应,从而达到治疗哮喘的目的。     

维吾尔药大苞荆芥总多糖对哮喘大鼠细胞因子的影响

目的观察维吾尔药大苞荆芥总多糖对大鼠哮喘模型细胞因子的影响,探讨其治疗哮喘的作用机制。方法将大鼠随机分为正常对照组、哮喘组、地塞米松组、大苞荆芥总多糖低、高剂量组;除正常对照组外,各组大鼠用卵白蛋白致敏和激发,建立哮喘模型。用ELISA法检测血清IL-4、IL-6、IL-17和IFN-γ水平,HE染色观察肺组织病理改变。结果与哮喘组相比,各治疗组血清IL-4、IL-6、IL-17水平明显下降(P<0.01),IFN-γ水平明显升高(P<0.01);总多糖低剂量组各指标与地塞米松组有统计学差异(P<0.05),高剂量组与之无明显差异;与总多糖低剂量组相比,高剂量组血清IL-4、IL-6、IL-17水平明显下降、IFN-γ水平明显上升(P<0.05);各组大鼠血清IL-4与IFN-γ水平呈负相关关系(r=-0.450,P<0.05),IL-4与IL-6、IL-4与IL-17,IL-6与IL-17均呈正相关关系(r分别为0.796、0.462和0.638,P<0.05)。结论大苞荆芥总多糖可抑制炎性细胞因子IL-4、IL-6、IL-17的释放,这或许是治疗哮喘的一条有效途径。     

地塞米松对哮喘小鼠肺组织中GPR43表达的调节作用

目的 研究G蛋白耦联受体43(GPR43)在哮喘小鼠肺组织内的表达,同时探讨地塞米松对GPR43表达的影响.方法 30只BALB/C6小鼠随机分为对照组、哮喘组、地塞米松组,每组10只;卵清白蛋白(OVA)致敏和激发建立哮喘小鼠模型;肺泡灌洗液(BALF)细胞计数;HE染色观察各组气道炎症发生及气道结构改变情况;RT-PCR测定各组小鼠肺组织GPR43mRNA的表达变化;免疫组化观察肺中GPR43的表达及定位.结果 哮喘组BALF嗜酸性粒细胞(EOS)与对照组相比明显增高,地塞米松组明显低于哮喘组(P＜0.01);HE染色提示哮喘组气道上皮出现EOS等大量炎性细胞浸润,管壁厚度较对照组明显增加(P＜0.01);RT-PCR结果提示GPR43受体mRNA的表达量在哮喘组最低,与对照、地塞米松组相比有统计学差异(P＜0.01);免疫组化图像分析提示GPR43蛋白表达哮喘组明显降低,与对照组、地塞米松组相比均有显著性差异(P＜0.01).结论 哮喘小鼠肺组织中GPR43表达下降,地塞米松能部分上调其表达,从而减轻气道炎症反应.     

哮喘小鼠肺组织中转录因子RORγt的表达与气道炎症的关系

目的:探讨Th17细胞转录因子RORγt在支气管哮喘小鼠肺组织中的表达及其与哮喘气道炎症的关系.方法:采用卵清蛋白(OVA)致敏方法建立支气管哮喘小鼠模型;BALB/c小鼠30只随机分为对照组、哮喘组、地塞米松治疗组各10只.采用酶联免疫吸附试验(ELISA)方法检测小鼠肺泡灌洗液(BALF)、血清中白细胞介素17(IL-17)水平;HE染色评价各组小鼠气道炎症情况;逆转录聚合酶链反应(RT-PCR)方法检测肺组织IL-17、RORγt mRNA表达水平;免疫印记(Western blot)方法检测肺组织RORγt蛋白表达水平.结果:哮喘组小鼠肺组织RORγt mRNA、蛋白水平及IL-17水平均明显高于对照组和地塞米松治疗组(P＜0.05),RORγt蛋白表达量与嗜酸性粒细胞数、淋巴细胞数、中性粒细胞数、BALF、外周血中IL-17含量、肺组织IL-17 mRNA表达量均呈正相关关系(r＝0.789、0.795、0.902、0.669、0.806、0.883,P值均＜0.01).结论:RORγt在支气管哮喘小鼠肺组织呈高表达,其表达水平与气道炎症密切相关,参与了哮喘气道炎症的发生过程.     

哮喘的介质和神经介质

哮喘的介质和神经介质上海第二医科大学附属仁济医院慢阻肺研究室（上海２００００１）许以平综述哮喘是一种具有复杂的病理生理和多因素参与的临床综合症，涉及许多的细胞和介质，疾病的起因与遗传和环境有关，但至今还未完全阐明。近年来气道变应性炎症（ＡＡＩ）与哮喘...     

miRNA-21在支气管哮喘患儿血清及哮喘小鼠模型肺组织中表达上调

目的探讨miRNA-21在支气管哮喘患儿外周血淋巴细胞及支气管哮喘小鼠模型肺组织中的表达,观察其靶基因PTEN在哮喘小鼠模型肺组织中的表达变化。方法应用real-time PCR方法检测支气管哮喘患儿与正常儿童外周血淋巴细胞miRNA-21的表达,卵蛋白致敏方法建立支气管哮喘小鼠模型,肺泡灌洗液(BALF)细胞计数,HE染色观察气道炎症。应用real-time PCR法检测哮喘组小鼠与对照组小鼠肺组织miRNA-21及其靶基因PTEN的表达,Western blot方法检测哮喘小鼠与对照组小鼠肺组织PTEN蛋白的表达。结果支气管哮喘患儿外周血淋巴细胞miRNA-21表达水平显著高于正常儿童(P0.01)。哮喘小鼠BALF中细胞总数及嗜酸性粒细胞数及肺组织炎症细胞浸润显著高于正常对照组,哮喘组小鼠肺组织miRNA-21mRNA表达水平显著高于正常对照,PTEN mRNA与蛋白水平明显低于正常对照组(P0.01)。结论 miRNA-21在支气管哮喘患儿及支气管哮喘小鼠模型中高表达,表明其可能参与支气管哮喘的发病机制。     

Causative agents, mediators and histomorphology of inflammation

The purpose of this survey on the interrelationship of causative agents, mediators and the histomorphology of inflammation is to show to what extent endogenous biochemical factors determine the inflammatory reaction. There is overwhelming evidence, today, that such factors are involved in the manifestation of acute as well as chronic, non-specific as well as well as specific inflammation. In fact, the histomorphological pattern of many inflammatory reactions more directly reflects the activity of the mediators than of the causative agents involved. Therefore, knowledge of the properties of mediators of inflammation does not only provide new insights into the underlying pathomechanisms but may also help in the understanding and interpretation of the histomorphology of inflammatory lesions.     

Effects of interleukin-18 on airway inflammation and the Th1/Th2 cytokine imbalance in guinea pig asthmatic model

Withrecent development of molecular biology andimmunology, more and more evidences suggestthat the Th1/Th2imbalanceis one of theimportantaspect of pathogenesisin bronchial asthma [1-3] .And modulation of the Th1/Th2 balance to controlthe airway inflammations has been proved to be ahot-spot inthe study of immune therapyfor bron-chial asthma [4-6] .Interleukin-18 (IL-18) , anewly discovered cytokine withregulatory effect onimmuno-competent cells ,has beeninvestigated byvarious authors for the …     

硫化氢对臭氧致小鼠气道炎症的影响

目的:研究硫化氢(H_2S)对臭氧(O_3)暴露所致小鼠气道炎症的影响,并探究其机制。方法:32只C57BL/6小鼠随机分为正常对照(control)组、O_3组、硫氢化钠(NaHS)+O_3组以及NaHS组。第1、3、5天将O_3组和NaHS+O_3组小鼠置于2.14 mg/m~3O_3环境中暴露3 h,同时control组和NaHS组置于新鲜空气中暴露3 h。每次暴露前30 min,NaHS+O_3组和Na HS组小鼠腹腔注射Na HS(14μmol/kg)。末次暴露24 h后测定小鼠气道反应性,收集支气管肺泡灌洗液用于炎性细胞计数和总蛋白测定,收集肺组织标本行HE染色观察形态改变。测定肺组织中IL-6、IL-8、丙二醛(MDA)和NF-κB p65蛋白水平。结果:与control组相比,O_3组的气道反应性、炎性细胞数、总蛋白浓度和炎症评分,以及IL-6、IL-8、MDA和NF-κB p65蛋白水平明显增高,NaHS+O_3组则明显低于O_3组。结论:H_2S显著减轻了O_3暴露所致气道炎症反应,可能与抑制脂质过氧化和降低NF-κB表达相关。     

Prolonged ingestion of ovalbumin diet by sensitized mice improves the metabolic consequences induced by experimental food allergy

The prevalence of food allergy is rising in the western world. Allergen restriction is the chosen treatment in this condition, but continuous ingestion of the antigen has shown positive results in clinical trials. In a previous study, we have shown several allergic and metabolic alterations after 7 days of ovalbumin (OVA) ingestion by sensitized mice. The aim of this study was to investigate whether prolonged ingestion of antigen by sensitized mice would reverse the metabolic consequences caused by experimental food allergy. For this, allergic and metabolic parameters were analysed after prolonged ingestion of an OVA diet by OVA‐sensitized mice. As shown previously, after 7 days of OVA consumption, sensitized mice showed increased serum levels of anti‐OVA immunoglobulin (Ig)E and IgG1, aversion to the antigen ingestion, marked body and adipose tissue weight loss, followed by adipose tissue inflammation and decreased serum levels of adipokines, glucose and triglycerides. However, after 14 days of oral challenge, sensitized mice showed an anti‐OVA IgE level similar to the mice that were only sensitized, but the specific IgG1 did not change. With this prolonged ingestion of OVA, sensitized mice were protected from OVA‐induced anaphylaxis when the antigen was given systemically at a dose of 2 mg/animal. Moreover, various parameters analysed were significantly ameliorated, including adipose tissue inflammation, body and adipose tissue loss, as well as serum levels of adipokines and triglycerides. Therefore, our data suggest that prolonged ingestion of OVA by sensitized mice results in an improvement of the metabolic consequences caused by experimental food allergy.     

Role of sex hormones in allergic inflammation in mice

BACKGROUND: A number of clinical studies have documented both a pro- and anti-inflammatory role for sex hormones in the context of lung inflammation and worsening of asthma. OBJECTIVE: To determine the role of sex hormones in a murine model of allergic inflammation and airway hyper-responsiveness (AHR) induced by ovalbumin (OVA). METHODS: Female BALB/c were sensitized to OVA on days 0 and 7 and subsequently challenged on day 14 over a 3-day period. Mice had their ovaries removed either 7 days before or 8 days after the first OVA injection on day 0. Pulmonary eosinophilia and AHR were measured 24 h following the last antigen challenge. In other experiments, ovariectomized mice (Ovx) were pre-treated with oestradiol benzoate. In further studies, the effect of the oestradiol antagonist tamoxifen on allergic inflammation in intact mice was evaluated. Spleens from all groups were collected for proliferation assays and measurement of cytokine release. RESULTS: Removal of the ovaries 7 days before sensitization to OVA significantly inhibited lung eosinophilia and IL-5 levels in lung lavage. Furthermore, airway reactivity (maximum response) but not sensitivity (PC100) to methacholine were significantly reduced in these mice. Proliferation of spleen cells and release of IL-5 collected from Ovx mice was significantly attenuated compared with spleen cells obtained from non-Ovx mice. Ovx mice treated with oestradiol benzoate presented partially restored levels of eosinophils and IL-5 in sensitized mice. Moreover, pharmacological antagonism of the effect of endogenous oestrogen with tamoxifen significantly reduced the number of eosinophils in the lung of intact sensitized mice, reproducing the effect of ovariectomy, and suggested a role for oestrogen in the process of antigen sensitization in female mice. In contrast, removal of ovaries 8 days after the first OVA injection failed to alter significantly pulmonary eosinophilia or AHR to methacholine in comparison with non-Ovx mice. Moreover, removal of the ovaries 8 days after the sensitization period induced a significant increase in levels of IL-5 in lung fluid. Spleen cells collected from these mice also had a significantly higher proliferation index and production of IL-5 in response to OVA than non-Ovx mice. Treatment with oestradiol benzoate partially reduced levels of eosinophils present in the lung of Ovx mice, supporting an anti-inflammatory role of sex hormones during the effector phase of the response to inhaled antigen. CONCLUSION: Sex hormones play a dual role in regulating allergic lung inflammation in mice.     

Effects of phenanthraquinone on allergic airway inflammation in mice

BACKGROUND: Diesel exhaust particles (DEP) enhance allergic airway inflammation in mice (Takano et al., Am J Respir Crit Care Med 1997; 156: 36-42). DEP consist of carbonaceous nuclei and a vast number of organic chemical compounds. However, it remains to be identified which component(s) from DEP are responsible for the enhancing effects. 9,10-Phenanthraquinone (PQ) is a quinone compound involved in DEP. OBJECTIVE: To investigate the effects of PQ inoculated intratracheally on allergic airway inflammation related to ovalbumin (OVA) challenge. MATERIALS AND METHODS: We evaluated effects of PQ on airway inflammation, local expression of cytokine proteins, and allergen-specific immunoglobulin production in mice in the presence or absence of OVA. Results In the presence of OVA, PQ (2.1 ng/animal) significantly increased the numbers of eosinophils and mononuclear cells in bronchoalveolar lavage fluid as compared with OVA alone. In contrast, the numbers of these cells around the airways were not significantly different between OVA challenge and OVA plus PQ challenge in lung histology. PQ exhibited adjuvant activity for the allergen-specific production of IgG1 and IgE. OVA challenge induced significant increases in the lung expression of IL-4, IL-5, eotaxin, macrophage chemoattractant protein-1, and keratinocyte chemoattractant as compared with vehicle challenge. However, the combination of PQ with OVA did not alter the expression levels of these proteins as compared with OVA alone. CONCLUSION: These results indicate that PQ can enhance the immunoglobulin production and the infiltration of inflammatory cells into alveolar spaces that are related to OVA, whereas PQ seems to be partially responsible for the DEP toxicity on the allergic airway inflammation.     

Effects of prior oral exposure to combinations of environmental immunosuppressive agents on ovalbumin allergen-induced allergic airway inflammation in Balb/c mice

Humans are exposed daily to multiple environmental chemicals in the atmosphere, in food, and in commercial products. Therefore, hazard identification and risk management must account for exposure to chemical mixtures. The objective of the study reported here was to investigate the effects of combinations of three well-known environmental immunotoxic chemicals – methoxychlor (MXC), an organochlorine compound; parathion (PARA), an organophosphate compound; and piperonyl butoxide (PBO), an agricultural insecticide synergist – by using a mouse model of ovalbumin (OVA)-induced allergic airway inflammation. Four-week-old Balb/c mice were exposed orally to either one or two of the environmental immunotoxic chemicals for five consecutive days, prior to intraperitoneal sensitization with OVA and an inhalation challenge. We assessed IgE levels in serum, B-cell counts, and cytokine production in hilar lymph nodes, and differential cell counts and levels of related chemokines in bronchoalveolar lavage fluid (BALF). Mice treated with MXC?+?PARA or PBO?+?MXC showed marked increases in serum IgE, IgE-positive B-cells and cytokines in lymph nodes, and differential cell counts and related chemokines in BALF compared with mice that received the vehicle control or the corresponding individual test substances. These results suggest that simultaneous exposure to multiple environmental chemicals aggravates allergic airway inflammation more than exposure to individual chemicals. It is expected that the results of this study will help others in their evaluation of immunotoxic combinational effects when conducting assessments of the safety of environmental/occupational chemicals.     

Regulation of airway inflammation and remodeling in asthmatic mice by TLR3/TRIF signal pathway

This paper aims to investigate the effect of Toll-like receptors 3 (TLR3)/TIR-domain-containing adapter-inducing interferon-β (TRIF) signal pathway on the airway inflammation and remodeling in asthmatic mice. C57BL/6 and TLR3^−/− mice were randomly divided into three groups (10 mice per group), including Control group (mice inhaled phosphate buffer saline (PBS)), Asthma group (mice inhaled ovalbumin (OVA)) and polyriboinosinic-ribocytidylic acid (poly (I: C)) group (asthmatic mice were injected intraperitoneally with TLR3 agonist poly (I: C)). Hematoxylin-eosin (HE) staining, Wright-Giemsa staining, Enzyme-linked immunosorbent assay (ELISA), Immunohistochemistry, Hydroxyproline assay, quantitative real time polymerase chain reaction (qRT-PCR) and Western blot were used to assess for the indices of airway inflammation and remodeling. In terms of WT mice, all asthma groups with or without the addition of poly (I: C) showed exaggerated inflammation and remodeling in the airways as compared to Control group, which were more seriously in poly (I: C) group than Asthma group. Furthermore, we observed the significant inhibition of airway inflammation and remodeling in the TLR3^−/− mice in both Asthma no matter with or without addition of poly (I: C) than the WT mice. TLR3 knockout could obviously relieve the airway inflammation and remodeling in asthma through inhibiting TLR3/TRIF signaling pathway.     

白细胞介素6对哮喘小鼠气道炎症和上皮下纤维化的影响

目的 :研究白细胞介素 6对哮喘小鼠气道炎症和气道结构重建的作用。方法 :雄性BALB C种系小鼠 2 4只 ,随机分成处理组、模型组和对照组 ,每组 8只 ,用卵蛋白致敏和反复激发 4周。每次激发前处理组腹腔内注射 2 0 0 μg白细胞介素 6单克隆抗体 ,模型组注射 2 0 0 μg大鼠IgG ,对照组注射等量的生理盐水。比较 3组气道反应性 (PC1 2 0 )、支气管肺泡灌洗液细胞成分、基底膜和上皮下胶原层厚度的变化。结果 :卵蛋白反复激发诱发小鼠PC1 2 0 显著降低 ,气道内炎症细胞数量明显增多 ,上皮基底膜增厚和上皮下胶原增加。与模型组比较 ,处理组支气管肺泡灌洗液中巨噬细胞、中性白细胞、嗜酸细胞和淋巴细胞明显上升(P <0 0 5 ) ,基底膜和上皮下胶原厚度分别从 (3 1± 0 4 ) μm和 (4 5± 0 3) μm减少至 (2 2± 0 2 ) μm和 (3 5± 0 2 ) μm(P <0 0 5 ) ,但PC1 2 0 无改变 (P >0 0 5 )。结论 :白细胞介素 6在哮喘中的作用是抑制气道炎症和促进气道结构重建。