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1.
Simvastatin attenuates bleomycin-induced pulmonary fibrosis in mice   总被引:4,自引:0,他引:4  
Background Bleomycin-induced fibrosis is extensively used to model aspects of the pathogenesis of interstitial pulmonary fibrosis. This study aimed to determine the benefic effects and mechanisms of simvastatin on bleomycininduced pulmonary fibrosis in mice. Methods Bleomycin-induced pulmonary fibrosis mice were administered with simvastatin in different doses for 28 days. We measured inflammatory response, fibrogenic cytokines and profibrogenic markers in both bleomycin-stimulated and control lungs, and correlated these parameters with pulmonary fibrosis. Results Simvastatin attenuated the histopathological change of bleomycin-induced pulmonary fibrosis and prevented the increase of lung hydroxyproline content and collagen (Ⅰ and Ⅲ) mRNA expression induced by bleomycin. Moreover, simvastatin down-regulated the increased expression of transforming growth factor-β1 (TGF-β1) and connective tissue growth factor (CTGF) induced by bleomycin at both gene and protein levels. Simultaneously, the accumulation of neutrophils and lymphocytes and the increased production of tumor necrosis factor-a (TNF-α) in bronchial alveolar lavage fluid were inhibited by simvastatin in early inflammatory phase after bleomycin infusion. The higher dose of simvastatin was associated with a more significant reduction in these inflammatory and fibrotic parameters. Furthermore, the inactivation of p38, RhoA and Smad2/3 signaling pathways was observed during simvastatin administration. Conclusions Simvastatin attenuated bleomycin-induced pulmonary fibrosis, as indicated by decreases in Ashcroft score and lung collagen accumulation. The inhibitory effect of simvastatin on the progression of pulmonary fibrosis may be demonstrated by reducing inflammatory response and production of TGF-β1 and CTGR These findings indicate that simvastatin may be used in the treatment of pulmonary fibrosis.  相似文献   

2.
Mucus hypersecretion in the airway   总被引:1,自引:0,他引:1  
Mucus hypersecretion is a distinguishing feature of chronic inflammation diseases, such as asthma,chronic bronchitis, bronchiectasis and cystic fibrosis Mucus hypersecretion leads to impairment of mucociliary clearance, abnormal bacterial plantation, mucus plug in the airway, and dysfunction of gas exchange.5 To block this vicious cycle, chronic inflammation in the airway must be controlled and mucus hypersecretion must be reduced.  相似文献   

3.
This study examined the expression of the anterior gradient-2 (AGR2) protein and Muc5ac protein in the lung tissues of asthmatic mice and the effect of dexamethasone, with an at- tempt to explore the role of AGR2 in the over-secretion of mucus in the airway. Eighteen BALB/c mice were divided into asthma group, control group and dexamethasone group. In dexamethasone group, dexamethasone was intraperitoneally administered. Expression of AGR2 protein and Muc5ac protein in the murine lung tissues was immunohistochemically detected. IL-13 level was determined in the bronchoalveolar lavage fluid (BALF) by ELISA. The results exhibited that the expression of AGR2 protein in asthma group (0.522±0.041) was significantly higher than that in normal controls (0.361±0.047) (P<0.01) and bore a positive linear relationship to the expression of Muc5ac protein (r=0.873, P<0.05) and IL-13 level (r=0.828, P<0.05). Expression of AGR2 protein in the dexa- methasone group (0.456±0.049) was significantly lower than that in the asthma group. It was con- cluded that:(1) the expression of AGR2 protein was significantly higher in asthmatic mice as com- pared with their normal counterparts; (2) the expression was obviously related to the expression of Muc5ac protein and IL-13; (3) dexamethasone could down-regulate the expression of AGR2 protein. Our findings suggested that AGR2 might be involved in the over-secretion of mucus in the airway in asthma.  相似文献   

4.
Allergic asthma is a chronic disorder characterized by chronic airway inflammation, airway hyperresponsiveness, reversible airway obstruction, airway remodelling and mucus hypersecretion. It has been widely recognized that the infiltration of the lung with increased number of eosinophils is a hallmark of this disease.1  相似文献   

5.
Eosinophil: central mediator of allergic asthma?   总被引:2,自引:1,他引:1  
Allergic asthma is a chronic disorder characterized by chronic airway inflammation, airway hyperresponsiveness, reversible airway obstruction, airway remodelling and mucus hypersecretion. It has been widely recognized that the infiltration of the lung with increased number of eosinophils is a hallmark of this disease.  相似文献   

6.
Objective: To evaluate the involvement of different CD4+ T cell subtypes in the anti-asthmatic effects of acupuncture in asthmatic mice. Methods: BALB/c mice were challenged by ovalbumin(OVA) for the establishment of experimental asthma model. Mice were divided into 4 groups by a random number table including the normal control, asthma model, acupuncture and sham acupuncture groups(14 per group). Acupoints Dazhui(GV 14), bilateral Fengmen(BL 12) and Feishu(BL 13) were selected for manual acupuncture treatment every other day for 4 weeks and Huantiao(GB 30) was selected for sham acupuncture. Airway hyperresponsiveness was examined by Buxco Pulmonary System. Pulmonary histopathology analysis was performed for inflammatory cell infiltration and mucus hypersecretion by haematoxylin eosin staining and periodic acid-Schiff staining. Inflammatory mediators assays of serum were investigated by enzyme-linked immunosorbent assay and Bio-Plex. CD4+ T cell subpopulations including the expression levels of important factors in T lymphocyte polarization in lung tissue were examined by flow cytometric and Western blot analyses. Related pathways were detected by Western blot assay. Results: Compared with the OVA-induced asthma model group, acupuncture could attenuate airway hyperresponsiveness, inhibit inflammatory cell infiltration and mucus hypersecretion(P0.05 or P0.01). Furthermore, acupuncture increased the expressions of T-bet and Foxp3+, the cell numbers of CD4+interferon gamma(IFN-γ)+ and CD4+ Foxp3+ in lung tissue and the level of Treg type cytokine interleukin(IL)-10 in serum(P0.05 or P0.01). Meanwhile, acupuncture reduced the RAR-related orphan receptor gamma t(RORγt) level, the cell numbers of CD4+ IL-17 A+ as well as the levels of IL-5, IL-13 and IL-17 A in serum(P0.05 or P0.01). In addition, both acupuncture and sham acupuncture could inhibit the phosphorylation of p38 and p44/42(P0.01). Conclusion: Acupuncture could alleviate allergic airway inflammation by strengthening the activities of Th1 and Treg, thus regulating the balance of CD4+ T cell subtypes in experimental asthmatic mice.  相似文献   

7.
Background Protectin D1 (PD1),derived from docosahexaenoic acid,has been shown to control and resolve inflammation in some experimental models of inflammatory disorders.We investigated the protective roles of protectin D1 in pulmonary inflammation and lung injury induced by lipopolysaccharide (LPS).Methods Mice were randomly assigned to six groups (n=6 per group):sham-vehicle group,sham-PD1 group,shamzVAD-fmk group,LPS-vehicle group,LPS-PD1 group,and LPS-PD1-zVAD-fmk group.Mice were injected intratracheally with 3 mg/kg LPS or saline,followed 24 hours later by intravenous injection of 200 μg/mouse PD1 or vehicle.At the same time,some mice were also injected intraperitoneally with the pan-caspase inhibitor zVAD-fmk.Seventy-two hours after LPS challenge,samples of pulmonary tissue and bronchoalveolar lavage fluid were collected.Optical microscopy was used to examine pathological changes in lungs.Cellularity and protein concentration in bronchoalveolar lavage fluid were analyzed.Lung wet/dry ratios and myeloperoxidase activity were measured.Apoptosis of neutrophils in bronchoalveolar lavage fluid (BALF) was also evaluated by flow cytometry.Results Intratracheal instillation of LPS increased neutrophil counts,protein concentration in bronchoalveolar lavage fluid and myeloperoxidase activity,it induced lung histological injury and edema,and also suppressed apoptosis of neutrophils in BALF.Posttreatment with PD1 inhibited LPS-evoked changes in BALF neutrophil counts and protein concentration and lung myeloperoxidase activity,with the outcome of decreased pulmonary edema and histological injury.In addition,PD1 promoted apoptosis of neutrophils in BALF.The beneficial effects of PD1 were blocked by zVAD-fmk.Conclusion Posttreatment with PD1 enhances resolution of lung inflammation during LPS-induced acute lung injury by enhancing apoptosis in emigrated neutrophils,which is,at least in part,caspase-dependent.  相似文献   

8.
Background A variety of inflammatory mediators and effector cells participate together in acute lung injury,and lead to secondary injury that is due to an inflammatory cascade and secondary diffuse lung parenchyma injury.Inflammation is associated with an oxidative stress reaction,which is produced in the development of airway inflammation,and which has positive feedback on inflammation itself.Resolvin D1 can reduce the infiltration of neutrophils,regulate cytokine levels and reduce the inflammation reaction,and thereby promote the resolution of inflammation.The purpose of this study is to investigate the effects of resolvin D1 on an inflammatory response and oxidative stress during lipopolysaccharide (LPS)-induced acute lung injury.Methods LPS (3 mg/kg) was used to induce the acute lung injury model.Pretreatment resolvin D1 (100 ng/mouse) was given to mice 30 minutes before inducing acute lung injury.Mice were observed at 6 hours,12 hours,1 day,2 days,3 days,4 days and 7 days after LPS was administrated,then they were humanely sacrificed.We collected bronchoalveolar lavage fluid (BALF) and the lung tissues for further analysis.Paraffin section and HE staining of the lung tissues were made for histopathology observations.Parts of the lung tissues were evaluated for wet-to-dry (W/D) weight ratio.tumor necrosis factor (TNF)-α,inter leukin (IL)-1β,IL-10 and myeloperoxidase (MPO) were detected by enzyme-linked immunosorbent assay (ELISA).A lipid peroxidation malondialdehyde (MDA) assay kit was used to detect MDA.A total superoxide dismutase assay kit with WST-1 was used to analyze superoxide dismutase (SOD).We determined the apoptosis of neutrophils by Flow Cytometry.A real-time quantitative PCR Detecting System detected the expression of mRNA for heme oxygenase (HO)-1.Results Pretreatment with resolvin D1 reduced the pathological damage in the lung,decreased the recruitment of neutrophils and stimulated their apoptosis.It markedly decreased the expressions of TNF-α,IL-1β and increased the expressions of IL-10,and decreased the production of MDA and increased the expressions of SOD.The mRNA expression of HO-1 was also significantly increased.Conclusions Resolvin D1 displays potent anti-inflammatory actions by regulating cytokines,inhibiting aberrant neutrophil recruitment and stimulating apoptosis of neutrophils.Resolvin D1 can also relieve the injury due to oxidative stress.The mechanisms might be related to increase HO-1 expression.  相似文献   

9.
Background Expression of murine calcium-activated chloride channel family member 3 (mCLCA3) has been reported to be increased in the airway epithelium of asthmatic mice challenged with ovalbumin (OVA). However, its role in asthmatic airway inflammation under no OVA exposure has not yet been clarified. Methods mCLCA3 plasmids were transfected into the airways of normal BALB/c mice. mCLCA3 expression and airway inflammation in mouse lung tissue were evaluated. Cell differentials and cytokines in bronchoalveolar lavage fluid (BALF) were analyzed. The expression of mCLCA3 protein and mucus protein mucin-5 subtype AC (MUC5AC) were analyzed by Western blotting. The mRNA levels of mCLCA3, MUC5AC and interleukin-13 (IL-13) were determined quantitatively. Results mCLCA3 expression was not detected in the control group while strong immunoreactivity was detected in the OVA and mCLCA3 plasmid groups, and was strictly localized to the airway epithelium. The numbers of inflammatory cells in lung tissue and BALF were increased in both mCLCA3 plasmid and OVA groups. The protein and mRNA levels of mCLCA3 and MUC5AC in the lung tissue were significantly increased in the mCLCA3 plasmid and OVA groups compared to the control group. The level of IL-13, but not IL-4, IL-5, IFN-y, CCL2, CCL5 or CCL11, was significantly increased compared with control group in BALF in the mCLCA3 plasmid and OVA groups. The level of IL-13 in the BALF in the mCLCA3 plasmid group was much higher than that in the OVA group (P 〈0.05). The level of mCLCA3 mRNA in lung tissue was positively correlated with the levels of MUC5AC mRNA in lung tissue, IL-13 mRNA in lung tissue, the number of eosinophils in BALF, and the content of IL-13 protein in BALE The level of IL-13 mRNA in lung tissue was positively correlated with the number of eosinophils in BALF and the level of MUC5AC mRNA in lung tissue. Conclusion These findings suggest that increased expression of a single-gene, mCLCA3, could simulate an asthma attack, and its mechanism may involve mCLCA3 overexpression up-regulating IL-13 expression.  相似文献   

10.
Objective: To evaluate the protective effects of Reduning Injection (热毒宁注射液, RDN), a patent Chinese medicine, on lipopolysaccharide (LPS)-induced acute lung injury (ALl) in rats and its underlying mechanisms of action. Methods: Sixty male Sprague-Dawley rats were randomly divided into 6 groups, including normal control, model, dexamethasone (DEX, 5 mg/kg), RDN-H (720 mg/kg), RDN-M (360 mg/kg) and RDN-L (180 mg/kg) groups, with 10 rats in each group. Rats were challenged with intravenous injection of LPS 1 h after intraperitoneal treatment with RDN or DEX. At 6 h after LPS challenge, lung tissues and bronchoalveolar lavage fluid (BALF) were collected, and the number of inflammatory cells was determined. The right lungs were collected for histopathologic examination, measurement of gene and protein expressions, superoxide dismutase (SOD) and myeloperoxidase (MPO) activities. Results: In vivo pretreatment of RDN (360, 720 mg/kg) significantly reduced the weight of wet to dry (W/D) ratio of lung, protein content in BALF, and led to remarkable attenuation of LPS-induced histopathological changes in the lungs. Meanwhile, RDN enormously decreased BALF total inflammatory cells, especially neutrophil and macrophage cell numbers. Moreover, RDN increased SOD activity, inhibited MPO activity, alleviated LPS-induced tumor neurosis factor-o~ (TNF-o~) and inducible nitric oxide synthase (iNOS) expression in lung tissues. Furthermore, RDN (720 mg/kg) efficiently weakened nuclear factor- kappa B (NF- K B) gene and protein expression. Conclusion: Anti-inflammatory effects of RDN was demonstrated to be preventing pulmonary neutrophil infiltration, lowering MPO activity, TNF-oL and iNOS gene expression by inhibiting NF- K B activity in LPS-induced ALl.  相似文献   

11.
黄连素对COPD大鼠气道炎症和粘液高分泌的调控作用研究   总被引:2,自引:0,他引:2  
目的探讨黄连素对COPD大鼠气道炎症和粘液高分泌的影响及研究其相关分子机制。方法清洁级雄性Wistar大鼠随机分为生理盐水对照组、COPD模型组和黄连素组各10只,通过熏香烟加气管注内毒素方法建立大鼠COPD模型。采集支气管肺泡灌洗液用ELISA法检测中性粒细胞弹性蛋白酶(neutrophil elastase,NE)、IL-10含量。采集支气管-肺组织标本用免疫组织化学法(SP法)检测NF-κB、粘蛋白Muc5ac表达,采用逆转录-聚合酶链反应(RT-PCR)检测Muc5ac mRNA表达。结果 COPD模型组大鼠BALF细胞总数、中性粒细胞数(PMN)、巨噬细胞数(AM)、NE较正常对照组显著升高(P〈0.01),IL-10水平显著下降(P〈0.01)。黄连素组BALF细胞总数、PMN、AM较COPD组显著降低(P〈0.01),L-10水平升则高(P〈0.05)。COPD模型组大鼠气道黏膜上皮NF-κB、Muc5ac mRN及蛋白表达较正常对照组显著升高(P〈0.01)。黄连素组气道黏膜上皮NF-κB、Muc5ac mRN及蛋白表达较COPD组显著下降(P〈0.01)。结论黄连素可负向调节气道炎症和粘液高分泌,其机制可能与黄连素抑制NE、NF-κB炎症因子,促进抗炎因子IL-10,下调粘蛋白Muc5ac表达有关。  相似文献   

12.
辛伐他汀对大鼠气道黏液高分泌的影响和机制研究   总被引:2,自引:0,他引:2  
目的了解辛伐他汀对丙烯醛引起的气道黏液高分泌的作用及其可能的机制。方法大鼠雾化吸人丙烯醛,建立气道黏液高分泌模型。将42只雄性SD大鼠按随机数字表法分为7组:对照组(A组)、辛伐他汀自身对照组(B组)、模型组(C组)、低剂量辛伐他汀组(D组)、中剂量辛伐他汀组(E组)、高剂量辛伐他汀组(F组)和甲羟戊酸组(G组),每组6只。分别用阿辛蓝-过碘酸雪夫(AB—PAS)和免疫组化染色检测气道黏蛋白和黏蛋白5ac(mucinSac,MUC5ac)的表达。RT—PCR检测MUC5acmRNA的表达。结果丙烯醛刺激可以使大鼠气道黏蛋白、MUC5ac蛋白和mRNA表达增高,使支气管肺泡灌洗液中巨噬细胞数增多。结论辛伐他汀可以抑制丙烯醛所致的气道黏液高分泌,甲羟戊酸可以部分逆转辛伐他汀的作用,其机制可能是通过甲羟戊酸途径减少巨噬细胞在肺中的浸润。  相似文献   

13.
目的:探讨细胞外信号通路1/2(ERK1/2)在气道黏液高分泌过程中的作用。方法:通过大鼠气道内注入脂多糖(LPS)并烟熏建立气道黏液高分泌模型。分别给予ERK1/2特异性阻断剂-U01260.25mg/kg、0.5mg/kg和1mg/kg腹腔注射14d。提取肺组织,采用免疫组化、RT-PCR等方法检测Muc5ac、ERK1/2及磷酸化ERK1/2(p-ERK1/2)等的表达水平。结果:LPS及烟熏刺激可以使大鼠气道上皮Muc5ac mRNA和蛋白的表达增多,并引起p-ERK1/2与ERK1/2比值明显增高。U0126可以抑制由LPS导致的气道Muc5ac高表达和p-ERK1/2与ERK1/2比值增高。p-ERK1/2与ERK1/2的比值与Muc5ac mRNA和蛋白的表达呈正相关关系。结论:U0126可抑制LPS及烟熏所致的气道黏液高分泌状态,其机制可能是ERK1/2信号通路参与了气道黏液高分泌的调控,U0126通过特异性阻断ERK1/2从而导致黏液高分泌的下调。  相似文献   

14.
目的 研究辛伐他汀对大鼠烟雾吸手性肺损伤中炎症反应的抑制作用.方法 将18只SD大鼠(雌雄不限)随机分为正常组、盐水组、辛伐他汀组,建立烟雾吸手性肺损伤模型,模型建立后30 min及12 h,辛伐他汀组给予辛伐他汀溶液50 mg/kg灌胃,盐水组大鼠给予等量生理盐水灌胃,正常组大鼠正常饲养.于致伤后24 h取右上肺肺组织行病理检查并行病理学评分.经腹主动脉取全血离心留取上层血清,并行左侧支气管肺泡灌洗留取肺泡灌洗液(BALF),采用ELISA法检测血清及BALF中白介素(IL)-6、肿瘤坏死因子(TNF)-α的含量.取右下肺部分肺组织以Western blot法检测蛋白提取物中IL-6、TNF-α及胞质中NF-κB p65的蛋白表达情况.结果 光镜下观察正常组肺泡结构正常,盐水组肺泡间隔水肿,肺泡腔内可见大量的中性粒细胞浸润,而与盐水组相比,辛伐他汀组上述症状减轻且肺组织病理学评分降低(P<0.05).盐水组、辛伐他汀组血清和BALF中IL-6、TNF-α的含量以及肺组织蛋白提取物中IL-6、TNF-α和NF-κB的表达均较正常组明显升高(P<0.05).而与盐水组相比,辛伐他汀组大鼠血清和BALF中IL-6、TNF-α的含量以及肺组织蛋白提取物中IL-6、TNF-α及NF-κB p65的表达均降低(P<0.05).结论 辛伐他汀通过抑制炎症介质的产生及炎症细胞的浸润,减轻吸手性肺损伤的炎症反应,对肺组织起到了一定的保护作用.  相似文献   

15.
目的 探讨磷酸二酯酶4(PDFA)抑制剂YM976对丙烯醛诱导的大鼠气道黏蛋白高分泌的影响及其作用机制.方法 将48只SD大鼠随机平均分为6组,其中4组以雾化吸入丙烯醛的方法 制备气道黏液高分泌模型并分为不予YM976干预的丙烯醛模型组和制模期间给予低、中或高剂量YM976干预组;另2组中,1组为正常对照组;1组为YM976对照组.取各组大鼠肺组织,以阿辛蓝-过碘酸雪夫(AB-PAS)染色检测黏蛋白的表达,免疫组织化学染色和蛋白质印迹法检测黏蛋白MueSae蛋白表达,反转录PCR检测Muc5ac mRNA表达,并取支气管肺泡灌洗液(BALF),以酶联免疫吸附试验(ELISA)检测BALF上清液中肿瘤坏死因子α(TNF-α)、细胞因子诱导的中性粒细胞趋化物1(CINC-1)浓度.结果 丙烯醛模型组和低、中、高剂量YM976干预组大鼠肺组织AB-PAS阳染面积(分别为23.65±2.86、22.63±2.12、16.34±1.72、5.03±0.72)、Muc5ac免疫组织化学染色积分吸光度值(分别为0.54±0.05、0.49±0.06、0.32±0.04、0.22±0.04)、Muc5ac蛋白表达积分吸光度值(分别为1.177±0.190、0.806±0.180、0.303±0.061、0.134±0.035)、Muc5ac mRNA表达积分吸光度值(分别为0.246±0.021、0.223±0.020、0.161±0.012、0.097±0.011)以及BALF中TNF-α浓度[分别为(96.77±2.31)、(87.65±2.75)、(73.56±2.62)、(52.23±2.79)μg/L]、CINC-1浓度[分别为(145.75±4.43)、(139.73±5.51)、(95.34±5.13)、(65.74±5.62)μg/L]均明显高于正常对照组[分别为4.38±0.32、0.12±0.02、0.058±0.024、0.061±0.006、(18.23±2.32)μg/L、(33.56±3.43)μLg/L,均P<0.05],但中、高剂量YM976干预组均明显低于丙烯醛模型组(均P<0.05).结论 PDE 4抑制剂YM976可能通过抑制炎症趋化因子TNF-α、CINC-1的释放而抑制丙烯醛诱导的大鼠气道黏蛋白高分泌.  相似文献   

16.
目的:观察氨茶碱和辛伐他汀对慢性阻塞性肺疾病(慢阻肺)的防治作用并从气道炎症和气道黏液高分泌角度探讨其作用机制。方法:采用烟熏和大鼠气管内注入脂多糖的方法建立慢阻肺模型。将40只雄性SD大鼠随机均分为对照组、慢阻肺组、氨茶碱组和辛伐他汀组。对照组和慢阻肺组用生理盐水1 mL/100 g灌胃,1次/d;氨茶碱组用氨茶碱溶液(5 g/L)1 mL/100 g灌胃,1次/d;辛伐他汀组用辛伐他汀溶液(0.5 g/L)1 mL/100 g灌胃,1次/d。用肺功能仪检测大鼠肺功能,HE染色观察大鼠支气管、肺组织病理变化,酶联免疫吸附(ELISA)法检测各组大鼠支气管肺泡灌洗液(BALF)中白细胞介素(IL)-8,IL-17及肿瘤坏死因子(TNF)-α含量,Western印迹法检测大鼠支气管肺组织中黏蛋白5AC和TLR4蛋白的表达,荧光实时定量(RT)-PCR检测大鼠支气管肺组织中黏蛋白5AC mRNA和TLR4 mRNA的表达。结果:慢阻肺组支气管、肺组织改变及肺功能变化符合慢阻肺病理生理特点。与对照组相比,氨茶碱组和辛伐他汀组支气管肺组织均出现不同程度的损伤,但损伤程度轻于慢阻肺组。慢阻肺组各项肺功能指标均明显低于对照组(均P<0.01),而氨茶碱组和辛伐他汀组均明显高于慢阻肺组(均P<0.01),辛伐他汀组呼气峰值流量明显高于氨茶碱组(P<0.01)。慢阻肺组BALF中IL-8,IL-17及TNF-α含量均明显高于对照组(均P<0.01),而氨茶碱组和辛伐他汀组均明显低于慢阻肺组(均P<0.01),氨茶碱组BALF中IL-8,IL-17及TNF-α含量均明显低于辛伐他汀组(均P<0.05)。慢阻肺组支气管肺组织黏蛋白5AC mRNA和TLR4 mRNA及其蛋白的表达水平均明显高于对照组(均P<0.01);而氨茶碱组和辛伐他汀组均明显低于慢阻肺组(均P<0.05),且两组间差异无统计学意义(均P>0.05)。结论:氨茶碱和辛伐他汀可降低慢阻肺模型大鼠BALF中IL-8,IL-17及TNF-α水平,抑制支气管肺组织中黏蛋白5AC和TLR4蛋白的表达,通过减轻气道炎症和气道黏液高分泌作用来达到防治慢阻肺的目的。  相似文献   

17.
目的 研究在大鼠气管内滴入MARCKS相关多肽(MANS)或/和地尔硫(艹卓)(DTZ)对气道黏蛋白5AC(MUC5AC)分泌的影响并探讨其可能的作用机制。方法 通过雾化吸入丙烯醛建立大鼠气道黏液高分泌模型后随机分为4组,对照组气管内滴入生理盐水,三个实验组即MANS组、DTZ组和联用组在气管内分别滴入MANS、DTZ以及二者同时滴入,1 h后获取支气管肺泡灌洗液(BALF)及肺组织。用ELISA法对BALF中的MUC5AC进行定量;用免疫组化染色对气道杯状细胞中MUC5AC进行特异性染色,用灰度扫描和图像分析对杯状细胞内的MUC5AC进行半定量分析。结果 BALF中MUC5AC的分泌量在MANS组和联用组均较对照组明显减少(P均〈0.05),在DTZ组无明显变化(P〉0.05);在联用组较MANS组亦明显减少(P〈0.05)。气道杯状细胞内MUC5AC的量在MANS组和联用组均较对照组显著增多(P均〈0.05);在单用DTZ组没有明显变化(P〉0.05)。结论 在丙烯醛诱导的大鼠气道黏液高分泌模型中,气管内滴入MANS可以减少气道黏液的分泌,单用DTZ气管内滴入不能减少气道黏液的分泌。但二者联合滴入时DTZ对MANS抑制气道黏液的分泌可能具有协同作用。  相似文献   

18.
王海霞  文富强 《西部医学》2011,(8):1419-1420,1424
目的通过检测辛伐他汀对大鼠肺组织中NF活性的影响,了解其对减少丙烯醛引起的气道黏液高分泌的可能机制。方法大鼠雾化吸入丙烯醛建立气道黏液高分泌模型。干预组在雾化吸入丙烯醛同时用不同浓度辛伐他汀灌胃。蛋白印迹(western blot)检测MUC5AC蛋白的表达,凝胶阻滞迁移分析方法(EMSA)检测NF-κB的活性。结果丙烯醛吸入刺激后12天,与正常对照组相比,MUC5AC蛋白、NF-κB活性增加。辛伐他汀干预后,与丙烯醛组相比,MUC5AC蛋白、NF-κB活性降低,应用甲羟戊酸后可以部分抵消辛伐他汀的作用,使MUC5AC蛋白产生、NF-κB活性增加。结论辛伐他汀可抑制丙烯醛所致气道粘液高分泌,其部分机制可能通过甲羟戊酸途径抑制NF-κB活性。  相似文献   

19.
目的探讨清金化痰汤对慢性阻塞性肺疾病急性加重期(AECOPD)模型大鼠肺组织叉头翼状螺旋转录因子P3(Foxp3)、维甲酸相关孤核受体γt(RORγt)表达的影响。方法 40只SPF Wistar雄性大鼠随机分为正常组、模型组、清金化痰汤组、克拉霉素组。除正常组外,其余组采取气道滴注脂多糖(LPS)联合烟熏的方法建立AECOPD气道黏液高分泌模型,并同时连续30 d分别给予生理盐水、清金化痰汤(8.4 g/kg)、克拉霉素(50 mg/kg)灌胃。实验第31天,提取大鼠肺组织,制作病理切片,并采用免疫组化法检测肺组织中黏蛋白5AC(Muc5AC)、中性粒细胞弹性蛋白酶(NE)的表达,观察Foxp3和RORγt的表达,免疫印迹法检测肺组织中Foxp3和RORγt的蛋白表达。结果与正常组比较,模型组Foxp3表达量无明显差异(P0.05),RORγt、Muc5AC、NE表达显著升高,Foxp3/RORγt显著下降(P0.01);清金化痰汤组与模型组比较,Foxp3表达量无明显差异(P0.05),RORγt、Muc5AC、NE表达显著降低,Foxp3/RORγt显著升高(P0.01或P0.05)。清金化痰汤组与克拉霉素组比较,Muc5AC显著降低(P0.05)。结论清金化痰汤可显著下调模型大鼠肺组织中RORγt蛋白表达,上调Foxp3/RORγt,这可能是清金化痰汤调节AECOPD黏液高分泌的机制之一。  相似文献   

20.
目的 观察阳和平喘颗粒对哮喘大鼠气道黏液高分泌的干预作用,探究其作用机制.方法 将50只清洁级SD大鼠随机分为正常组、模型组、阳和平喘颗粒低剂量组、阳和平喘颗粒高剂量组和地塞米松组,每组10只.采用卵清蛋白成功诱发大鼠哮喘后,并予相应药物干预8周.阿尔辛蓝过碘酸雪夫氏染色,光镜下观察气道杯状细胞;采用免疫组织化学法检测大鼠气道黏蛋白5AC(mucin 5AC,MUC5AC)的表达水平;采用Western blot、RT-PCR分别检测大鼠肺组织转化生长因子β1(transforming growth factor beta 1,TGF-β1)蛋白及其mRNA表达水平.结果 阳和平喘颗粒高、低剂量组及地塞米松组大鼠气管可见少量黏液分泌,未见明显杯状细胞增生;与模型组比较,阳和平喘颗粒高、低剂量组及地塞米松组大鼠气道组织杯状细胞面积和MUC5AC蛋白表达水平,以及肺组织TGF-β1蛋白及TGF-β1mRNA表达水平均显著降低(P<0.01);阳和平喘颗粒高剂量的效应显著优于低剂量,呈现明显的剂量依赖性(P<0.01).结论 阳和平喘颗粒可降低哮喘大鼠气道黏液高分泌,机制可能与其下调肺组织TGF-β1蛋白及其基因表达水平,抑制MUC5AC生成有关.  相似文献   

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