siRNA沉默β-Catenin对肝星状细胞工、Ⅲ型胶原表达的影响

目的 研究siRNA干扰β-Catenin表达、阻断Wnt/β-Catenin信号通路对肝星状细胞(HSC)Ⅰ、Ⅲ型胶原表达的影响.方法 将化学合成siRNA β-Catenin以Lipofectamine包裹,转染HSC-T6细胞,设阴性对照和空白对照,抽提细胞总RNA及蛋白质,收集培养上清液,应用反转录-聚合酶链反...     

体外血管钙化模型中骨钙素的分泌和X型胶原的表达

目的 :研究 2 5 羟基胆固醇对体外培养的主动脉中膜细胞钙化的促进作用 ,以及在此过程中骨钙素的分泌和X型胶原mRNA的表达与钙化的关系 ,初步探讨主动脉钙化的机制。方法 :采用外殖块法分离培养家兔主动脉中膜细胞 ,进行vonkossa染色以显示钙化 ,显微分光光度法检测细胞内外不溶性钙。平衡法1 2 5 I放免测定培养上清骨钙素的含量。RT PCR方法检测X型胶原mRNA的表达。结果 :2 5 羟基胆固醇 (实验组 )培养的传代细胞可见多个细胞结节 ,且细胞结节vonkossa染色阳性 ;而对照组无细胞结节形成 ,vonkossa染色阴性。前者每孔不溶性钙沉积量 ,以及培养上清中骨钙素含量明显高于后者。且实验组X型胶原mRNA的表达为阳性 ,而对照组为阴性。结论 :2 5 羟基胆固醇可促进主动脉中膜细胞发生钙化。主动脉中膜在体外钙化过程中与成骨细胞相似 ,骨钙素分泌增多且有X型胶原mRNA的表达 ,表明二者具有某些共同的发生机制     

瘦素对乙醛诱导肝星状细胞活化过程中Ⅰ型胶原及α-平滑肌肌动蛋白表达的影响

目的:观察瘦素对乙醛诱导肝星状细胞(HSC)活化过程中α-SMA和I型胶原表达的影响,旨在从体外探讨瘦素在酒精性肝病中的可能作用。方法:采用SD大鼠肝脏原位灌流消化的方法获得并原代及传代培养HSC,分乙醛(200μmol/L)处理组,瘦素(100nmol/L)处理组及联合处理组(乙醛200μmol/L加瘦素100nmol/L)。用实时荧光定量PCR方法检测各组细胞TGF-β1、Ⅰ型胶原及α-SMA(α-平滑肌肌动蛋白)mRNA表达水平,Western blot检测各组细胞α-SMA表达量,ELISA法检测培养上清中TGF-β1及Ⅰ型胶原含量。结果:①乙醛处理组中TGF-β1和Ⅰ型胶原基因及蛋白表达量明显高于空白对照组(P<0.05),α-SMA表达量与对照组相比差异无显著性意义(P>0.05);②瘦素处理组TGF-β1、Ⅰ型胶原及α-SMA表达量与对照组相比差异无显著性意义(P>0.05);③联合处理组TGF-β1、Ⅰ型胶原及α-SMA表达量明显高于对照组(P<0.05),但TGF-β1、Ⅰ型胶原表达量与乙醛处理组相比差异无显著性意义(P>0.05)。结论:在乙醛诱导肝星状细胞活化过程中,瘦素能协同上调α-SMA的表达;但对TGF-β1及Ⅰ型胶原的表达无影响,Ⅰ型胶原和α-SMA的表达可能是依赖于不同的调控机制来实现。     

芦荟大黄素对血吸虫病性肝纤维化小鼠的影响

目的:探讨芦荟大黄素对血吸虫肝纤维化的影响。方法:采用日本血吸虫尾蚴感染小鼠建立血吸虫性肝纤维化模型,用芦荟大黄素0.3mg.kg-1.d-1治疗8周。测定小鼠肝脏匀浆丙二醛(MDA)水平,免疫组化检测其肝组织转化生长因子β1(TGF-β1)、血管内皮生长因子(VEGF)、局部黏着斑激酶(FAK)、Ⅰ型胶原和Ⅲ型胶原的表达。结果:芦荟大黄素能减轻血吸虫性肝纤维化的组织病理改变,使血吸虫肝纤维化小鼠肝脏Ⅰ型胶原和Ⅲ型胶原的表达降低,显著抑制肝组织中TGF-β1、VEGF和FAK的表达(P<0.01)。结论:芦荟大黄素对血吸虫性肝纤维化有治疗作用,其作用机制可能与影响TGF-β1、VEGF和FAK的表达相关。     

Synergistic effect of a novel oxymatrine-baicalin combination against hepatitis B virus replication,α smooth muscle actin expression and type I collagen synthesis in vitro

AIM: To study the effect of oxymatrine-baicalin combination (OB) against HBV replication in 2.2.15 cells and α smooth muscle actin (α SMA) expression, type I,collagen synthesis in HSC-T6 cells.METHODS: The 2.2.15 cells and HSC-T6 cells were cultured and treated respectively. HBsAg and HBeAg in the culture supernatants were detected by ELISA and HBV DNA levels were determined by fluorescence quantitative PCR. Total RNA was extracted from HSC-T6 cells and reverse transcribed into cDNA. The cDNAs were amplified by PCR and the quantities were expressed in proportion to β actin. The total cellular proteins extracted from HSC-T6 cells were separated by electrophoresis. Resolved proteins were electrophoretically transferred to nitrocellulose membrane. Protein bands were revealed and the quantities were corrected by β actin.RESULTS: In the 2.2.15 cell culture system, the inhibitory rate against secretion of HBsAg and HBeAg in the OB group was significantly stronger than that in the oxymatrine group (HBsAg, P = 0.043; HBeAg, P =0.026; respectively); HBV DNA level in the OB group was significantly lower than that in the oxymatrine group (P =0.041). In HSC-T6 cells the mRNA and protein expression levels of α SMA in the OB group were significantly lower as compared with those in the oxymatrine group (mRNA, P = 0.013; protein, P = 0.042; respectively); The mRNA and protein expression levels of type I collagen in the OB group were significantly lower as compared with thosein the oxymatrine group (mRNA, P ＜ 0.01; protein, P ＜0.01; respectively).CONCLUSION: OB combination has a better effect against HBV replication in 2.2.15 cells and is more effective against α SMA expression and type I collagen synthesis in HSC-T6 cells than oxymatrine in vitro.     

红霉素预防兔气管损伤后气管狭窄研究

目的 探讨红霉素在预防兔气管损伤后气管狭窄的作用及机制.方法 18只新西兰大耳白兔随机分为阴性对照组、模型对照组、红霉素治疗组,每组均行气管切开,阴性对照组气管切开后直接缝合气管,其余2组气管切开尼龙刷刮除气管黏膜后缝合气管.红霉素治疗组术前7d开始给予红霉素13.6mg/kg,每日灌胃至术后10 d,阴性对照组、模型对照组每日灌胃等量生理盐水.术后10 d处死兔子,收集气管组织,HE染色检查气管组织病理学改变并测量气管狭窄率;实时定量PCR检测各组气管组织转化生长因子β1 (TGF-β1) mRNA表达;免疫组化法检测气管组织Ⅰ型胶原蛋白、Ⅲ型胶原蛋白的表达.结果 红霉素治疗组气管狭窄率为(35.11±4.50)％,阴性对照组气管狭窄率为(11.96±3.26)％,模型对照组气管狭窄率为(53.95±7.09)％,红霉素治疗组气管狭窄率低于模型对照组(t=13.98,P＜0.05).组织病理学结果显示,模型对照组气管狭窄组织中较多炎性细胞浸润,成纤维细胞大量增殖,大量小血管生成,而红霉素治疗组炎性细胞浸润、成纤维化细胞增殖、小血管生成均减少.红霉素治疗组TGF-β1 mRNA相对表达量较模型对照组减少(t=4.55,P＜0.05).免疫组化结果显示,红霉素治疗组的工型胶原蛋白、Ⅲ型胶原蛋白的表达量均较模型对照组明显降低(P值均＜0.05).结论 红霉素可能通过抗炎,下调TGF-β1、Ⅰ型胶原蛋白、Ⅲ型胶原蛋白表达,减轻兔气管损伤后气管狭窄.     

Localization of Fibril/Microfibril and Basement Membrane Collagens in Diabetic Glomerulosclerosis in Type 2 Diabetes

Collagen is one of the major components of the extracellular matrices of the kidney. Basement membrane collagen, type IV collagen, is the major component in normal glomeruli. Fibril and interstitial collagen such as type III collagen, type V collagen, and type VI collagen are minor components of glomerular extracellular matrices and are localized mainly in the interstitium. Diabetic glomerulosclerosis is characterized by the expansion of the glomerular mesangial matrix as well as by thickening of the glomerular basement membrane. In order to clarify the roles of these various types of collagen in the development of diabetic glomerulosclerosis, immunohistochemical studies were perfomed in kidney specimens from patients with Type 2 diabetes. Early glomerulosclerosis is characterized by expansion of mesangial matrix with basement membrane collagen. However, in later stages glomerulosclerosis is characterized by an increase in the minor collagen components, such as type V and type VI collagen or collagens not normally present, such as type III collagen. Mesangial cells are known to synthesize all these types of collagen. In diabetes, phenotypic change in mesangial cells might produce excess amounts of fibril and interstitial collagen such as type III, type V, and type VI collagen, thus, leading to glomerulosclerosis.     

双环醇对慢性乙型肝炎患者肝星状细胞活化和胶原合成的影响

目的:观察双环醇对慢性乙型肝炎(乙肝)患者肝组织炎症、纤维化程度、肝星状细胞活化和胶原合成的影响,探讨其抗纤维化作用机制。方法:20例慢性乙肝患者以双环醇150mg/d治疗24周,治疗前、后分别行肝穿刺活体组织病理学检查,评估治疗前、后肝组织炎症及纤维化程度;并应用免疫组织化学技术和彩色病理图文分析系统观察治疗前、后肝组织内α平滑肌肌动蛋白(α-SMA)、转化生长因子β1(TGF-β1)表达状况和Ⅰ、Ⅲ型胶原含量的变化。结果:慢性乙肝患者经双环醇治疗后,其血清丙氨酸氨基转移酶(ALT)和γ谷氨酰转移酶(γ-GT)水平可显著降低,复常率分别达95%和70%,不仅肝组织炎症和纤维化程度明显改善,且肝组织内α-SMA和TGF-β1的表达强度明显减弱,同时Ⅰ、Ⅲ型胶原的含量也较治疗前明显降低。结论:双环醇治疗可减轻慢性乙肝患者肝脏炎症反应和纤维化程度,同时明显降低肝组织内TGF-β1、α-SMA的表达,阻止肝星状细胞活化和Ⅰ、Ⅲ型胶原的合成,从而发挥抗纤维化作用。     

Antifibrotic effects of green tea on in vitro and in vivo models of liver fibrosis

AIM: To examine the protective effect of green tea extract (GT) on hepatic fibrosis in vitro and in vivo in dimethylnitrosamine (DMN)-induced rats. METHODS: HSC-T6, a rat hepatic stellate cell line, was used as an in vitro assay system. Cell proliferation,collagen content, and type 1 collagen expression were examined in activated HSC-T6 cells. Collagen was determined by estimating the hydroxyproline content.In rats with DMN-induced hepatic fibrosis, serum aspartate aminotransferase and alanine aminotransferase concentrations, liver hydroxyproline and lipid peroxides were determined. Pathologic changes were examined by hematoxylin & eosin staining.RESULTS: GT administration prevented the development of hepatic fibrosis in the rat model of DMN-induced liver fibrosis. These results were confirmed both by liver histology and by quantitative measurement of hepatic hydroxyproline content, a marker of liver collagen deposition. Accordingly, inhibition of proliferation, reduced collagen deposition, and type 1 collagen expression were observed in activated HSC-T6 cells following GT treatment. These results imply that GT reduced the proliferation of activated HSC and down regulated the collagen content and expression of collagen type 1, thereby ameliorating hepatic fibrosis. tea administration can effectively improve liver fibrosis caused by DMN, and may be used as a therapeutic option and preventive measure against hepatic fibrosis.     

Synergistic effect of a novel oxymatrine-baicalin combination against hepatitis B virus replication, α smooth muscle actin expression and type I collagen synthesis in vitro

AIM: To study the effect of oxymatrine-baicalin combination (OB) against HBV replication in 2.2.15 cells and alpha smooth muscle actin (alpha SMA) expression, type I, collagen synthesis in HSC-T6 cells. METHODS: The 2.2.15 cells and HSC-T6 cells were cultured and treated respectively. HBsAg and HBeAg in the culture supernatants were detected by ELISA and HBV DNA levels were determined by fluorescence quantitative PCR. Total RNA was extracted from HSC-T6 cells and reverse transcribed into cDNA. The cDNAs were amplified by PCR and the quantities were expressed in proportion to beta actin. The total cellular proteins extracted from HSC-T6 cells were separated by electrophoresis. Resolved proteins were electrophoretically transferred to nitrocellulose membrane. Protein bands were revealed and the quantities were corrected by beta actin. RESULTS: In the 2.2.15 cell culture system, the inhibitory rate against secretion of HBsAg and HBeAg in the OB group was significantly stronger than that in the oxymatrine group (HBsAg, P = 0.043; HBeAg, P = 0.026; respectively); HBV DNA level in the OB group was significantly lower than that in the oxymatrine group (P = 0.041). In HSC-T6 cells the mRNA and protein expression levels of alpha SMA in the OB group were significantly lower as compared with those in the oxymatrine group (mRNA, P = 0.013; protein, P = 0.042; respectively); The mRNA and protein expression levels of type I collagen in the OB group were significantly lower as compared with those in the oxymatrine group (mRNA, P < 0.01; protein, P < 0.01; respectively). CONCLUSION: OB combination has a better effect against HBV replication in 2.2.15 cells and is more effective against alpha SMA expression and type I collagen synthesis in HSC-T6 cells than oxymatrine in vitro.     

金钗石斛多糖对肝纤维化大鼠TGF-β1、α-SMA、Ⅰ型胶原、Ⅲ型胶原表达的影响

目的 探讨金钗石斛多糖(DNP)对肝纤维化(HF)大鼠肝组织转化生长因子(TGF)-β1、α-平滑肌肌动蛋白(α-SMA)、Ⅰ、Ⅲ型胶原表达的影响.方法 SD大鼠随机分为正常组,模型组,秋水仙碱组(0.2 mg/kg),扶正化瘀组(0.415 g/kg),DNP低、中、高剂量组(5、10、20 g/kg),采用50％四...     

环氧氯丙烷处理对生物瓣膜胶原降解代谢影响的初步研究

目的通过对人成纤维细胞在环氧氯丙烷（epoxy chloropropane,EC）处理的胶原膜上种植生长的初步观察,了解EC对胶原降解的影响。方法按不同方法处理的胶原膜分组:①单纯胶原组（Con组）;②环氧氯丙烷处理组（EC组）;③戊二醛（glutaraldehyde,GA）处理组（GA组）。将人成纤维细胞（fibroblast,Fb）通过静态种植方法分别种植在不同的胶原膜上,经形态学检测、逆转录-聚合酶链反应（RT-PCR）,观察人成纤维细胞的组织学和超微结构、基质金属蛋白酶（matrix metalloproteinases,MMPs）在mRNA水平上的表达。结果人成纤维细胞在GA组胶原膜上生长较差,MMPs在mRNA水平上的表达增高,在EC组胶原膜上生长良好,MMPs在mRNA水平上的表达减低,两组表达差异显著（P<0.05）。结论EC处理可以降低胶原的降解。这可能是EC处理生物瓣防钙化的机制之一,同时为EC处理构建新型防钙化组织工程心脏瓣膜支架提供了实验依据。     

氯沙坦钾对血管内皮剥脱术后Ⅰ型胶原增生的影响

目的：探讨血管内皮剥脱术后血清Ⅰ型胶原浓度的变化及氯沙坦对其影响。方法：将24只实验兔随机分为3组（均为8只）：血管成形术（AP）组、血管成形术＋氯沙坦钾（AP＋L）组及对照组（C）组。应用球囊拉伤动脉内膜加高脂饲养的方法建立兔髂动脉硬化模型，采用核酸分子杂交技术对髂动脉壁平滑肌细胞（SMC）的Ⅰ型胶原基因的表达情况进行观察。结果：术后1周时AP组Ⅰ型胶原基因开始表达（P＜0．05），2、4周时显著表达（P＜0．01），AP＋L组Ⅰ型胶原基因未表达。结论：血管内皮剥脱可致Ⅰ型胶原合成增加，氯沙坦钾对其有抑制作用。     

高糖条件下基质细胞趋化因子1α抑制人肾小管上皮细胞Ⅳ型胶原表达

目的 本文探讨基质细胞趋化因子1α （stromal cell-derived factor-1,SDF-1α）对人肾小管上皮细胞（HK细胞）细胞外基质（Ⅳ型胶原）表达的影响.方法 不同浓度的葡萄糖培养HK细胞,分为正常葡萄糖组（NG组：含5.5 mmol/L葡萄糖）和高糖组（HG组：含25.0 mmol/L葡萄糖）,分别用转化生长因子β1 （TGF-β1）和SDF-1α干预HK细胞12h,再分为空白对照组（NC组）、阴性对照组（DMSO组）、T组（TGF-β1组）、S组（SDF-1α组）、T＋S组（TGF-β1和SDF-1α共同干预组）,采用实时定量聚合酶链反应（RT-PCR）和Western blotting分别检测Ⅳ型胶原mRNA和蛋白的表达.两组间比较采用t检验.结果 （1）HK细胞能持续表达SDF-1α和其受体CXCR4 mRNA.高糖条件下SDF-1α和CXCR4mRNA表达呈时间梯度增加,24 h两者表达量达到高峰.24 h CXCR4 mRNA表达量是12h表达量的1.2倍（t=6.08,P＜0.05）,SDF-1αmRNA表达量是12h的1.58倍（t=7.52,P＜0.05）.（2）高糖条件下SDF-1α抑制HK细胞Ⅳ型胶原mRNA和蛋白的表达,并能降低由TGF-β1诱导的Ⅳ型胶原表达.S＋T组Ⅳ型胶原mRNA表达量是T组的0.33倍（t=12.57,P＜0.05）,蛋白表达量是T组的0.47倍（t=14.23,P＜0.05）.但在正常葡萄糖条件下,SDF-1α对由TGF-β1诱导的Ⅳ型胶原表达没有影响.（3）TGF-β1促进HK细胞Ⅳ型胶原mRNA和蛋白表达,高糖条件下其促进作用更为显著.T组Ⅳ型胶原mRNA是正常对照组的6.63倍（t=19.21,P＜0.05）,蛋白表达量是其2.59倍（t=15.71,P＜0.05）.结论 高糖条件下SDF-1α能减轻TGF-β1诱导的HK细胞Ⅳ型胶原表达,可能由此改善肾脏纤维化.TGF-β1促进HK细胞Ⅳ型胶原的表达,促进肾脏纤维化的发生发展.     

Serum type Ⅳ collagen level is predictive for esophageal varices in patients with severe alcoholic disease

AIM： To determine factors predictive for esophagea varices in severe alcoholic disease （SAD）. METHODS： Abdominal ultrasonography （US） was performed on 444 patients suffering from alcoholism. Forty-four patients found to have splenomegaly and/ or withering of the right liver lobe were defined as those with SAD. SAD patients were examined by upper gastrointestinal （UGI） endoscopy for the presence of esophageal varices. The existence of esophageal varices was then related to clinical variables. RESULTS： Twenty-five patients （56.8%） had esophageal varices. A univariate analysis revealed a significant difference in age and type Ⅳ collagen levels between patients with and without esophageal varices. A logistic regression analysis identified type Ⅳ collagen as the only independent variable predictive for esophageal varices （P = 0.017）. The area under the curve （AUC） for type Ⅳ collagen as determined by the receiver operating characteristic （ROC） for predicting esophageal varices was 0.78. CONCLUSION： This study suggests that the level of type Ⅳ collagen has a high diagnostic accuracy for the detection of esophageal varices in SAD.     

热休克蛋白47在日本血吸虫病肝纤维化病程的动态变化

目的观察热休克蛋白47(heat shock protein 47,HSP47)在日本血吸虫病患者肝脏组织中的表达情况及其在日本血吸虫病肝纤维化小鼠动物模型中的动态变化。方法收集2008—2012年期间同济医院门诊和住院部日本血吸虫病肝纤维化患者肝穿标本72例。用免疫组织化学法检测HSP47表达;Masson染色观察胶原增生情况;实时荧光定量PCR检测HSP47、Ⅰ型胶原、结缔组织生长因子(connective tissue growth factor,CTGF)及转移生长因子-β1(transforming growth factor-β1,TGF-β1)m RNA水平的表达。构建实验性日本血吸虫病肝纤维化小鼠模型,分别于感染后第6、8、12周取小鼠肝组织,用免疫组织化学法检测HSP47表达,采用实时荧光定量PCR及Western blot检测HSP47的m RNA和蛋白水平表达及Ⅰ型胶原纤维增生情况。结果日本血吸虫病肝纤维化患者肝组织中的HSP47主要表达在肝脏间质细胞及虫卵结节周围,并随纤维化程度进展显著增多(P均0.01),与Ⅰ型胶原增生趋势平行。各纤维化分期患者肝组织胶原及纤维化相关因子CTGF及TGF-β1 m RNA表达均明显高于S0期无纤维化患者(P均0.01)。在肝纤维化模型小鼠中HSP47随纤维化进展其表达亦显著升高,感染后第6、8、12周,HSP47及Ⅰ型胶原的表达量均显著高于正常对照小鼠(P均0.01),同血吸虫病肝纤维化患者的表达趋势一致。结论 HSP47在日本血吸虫病肝纤维化患者和日本血吸虫病动物模型肝组织中表达均上调,且随Ⅰ型胶原、CTGF、TGF-β1增多呈相同趋势,其有望成为肝纤维化新的诊断标志和治疗靶点。     

间质胶原酶表达质粒对实验性大鼠肝纤维化的影响

目的观察间质胶原酶（ＭＭＰ－１）表达质粒对大鼠肝纤维化的影响。方法运用逆转录巢式ＰＣＲ和重组ＤＮＡ技术，构建大鼠ＭＭＰ－１真核细胞表达质粒，经脂质体包埋后，利用腹腔注射将其导人免疫性大鼠肝纤维化模型体内；通过ＲＴ－ＰＣＲ，Ⅰ、Ⅲ型胶原的免疫组化以及Ｍａｓｓｏｎ胶原染色观察ＭＭＰ－１表达质粒对大鼠肝纤维化的影响。结累ＭＭＰ－１表达质粒可促进肝脏中Ⅰ、Ⅲ型胶原的降解（Ｐ＜０．０１），且作用较秋水仙碱为强（Ｐ＜０．０５）；在病理形态学的观察方面，ＭＭＰ－１表达质粒对肝纤维化有一定的逆转作用（Ｐ＜０．０５），但与秋水仙碱相比差异无显著性（Ｐ＞０．０５）。结论ＭＭＰ－１表达质粒对肝纤维化有一定的逆转作用，但作用有限。     

抗纤维化短肽N-乙酰基-丝氨酰-天门冬酰-赖氨酰-脯氨酸对大鼠心脏成纤维细胞胶原合成与降解的调节作用

目的探讨N-乙酰基-丝氨酰-天门冬酰-赖氨酰-脯氨酸（AcSDKP）对血小板源性生长因子（PDGF）诱导的大鼠心脏成纤维细胞增殖、胶原合成和降解代谢的调节作用。方法分离培养新生大鼠心脏成纤维细胞。采用^3H-TdR和。H-脯氨酸掺入法分别检测心脏成纤维细胞增殖与胶原蛋白合成。Western blot法检测心脏成纤维细胞Ⅰ、Ⅲ型胶原蛋白表达和基质金属蛋白酶（MMP）-1蛋白的表达。明胶酶谱法检测心脏成纤维细胞MMP-2和MMP-9活性的表达。结果PDGF促进心脏成纤维细胞增殖、胶原合成,Ⅰ、Ⅲ型胶原表达,以及MMP-2、MMP-9活性和MMP-1表达。AcSDKP对PDGF介导的心脏成纤维细胞增殖、胶原合成均有抑制作用。AcSDKP上调由PDGF介导的心脏成纤维细胞MMP-2、MMP-9活性和MMP-1的表达。结论AcSDKP抑制PDGF介导的心脏成纤维细胞增殖和胶原的合成,上调MMPs活性或表达,促进胶原的降解,这些可能与AcSDKP抗心脏纤维化作用相关。     

氨茶碱对慢性阻塞性肺疾病大鼠模型转化生长因子β1和胶原的干预作用

目的 观察慢性阻塞性肺疾病( COPD)大鼠模型支气管肺组织转化生长因子-β1（TGF-β1）、Ⅰ型胶原、Ⅲ型胶原的变化以及氨茶碱药物干预的影响。方法 将35只雄性Wistar大鼠分3组;正常对照组（A组,10只）、COPD模型组（B组,15只）、氨茶碱治疗组（C组,10只）。气管内注入脂多糖(LPS)及每天烟熏法制作...