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野百合碱诱导大鼠肺动脉高压模型的建立   总被引:1,自引:0,他引:1  
背景:目前尚缺乏简单易行、实用、操作性强的肺动脉高压动物模型。目的:建立一种实用的注射野百合碱诱导的肺动脉高压动物模型。方法:采用一次性皮下注射野百合碱60mg/kg的方法制备SD大鼠肺动脉高压模型。结果与结论:野百合碱注射后第1,2,3,4周,大鼠平均肺动脉压明显升高,右心室肥厚明显。光镜下可见肺小血管肌化程度增强,相对中膜厚度增加,肺血管密度减少,以上症状均随野百合碱注射时间的延长逐渐加重。证实此方法建立的大鼠肺动脉高压模型造模成功。  相似文献   

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背景:目前尚缺乏简单易行、实用、操作性强的肺动脉高压动物模型.目的:建立一种实用的注射野百合碱诱导的肺动脉高压动物模型.方法:采用一次性皮下注射野百合碱60 mg/kg的方法制备SD大鼠肺动脉高压模型.结果与结论:野百合碱注射后第1,2,3,4周,大鼠平均肺动脉压明显升高,右心室肥厚明显.光镜下可见肺小血管肌化程度增强,相对中膜厚度增加,肺血管密度减少,以上症状均随野百合碱注射时间的延长逐渐加重.证实此方法建立的大鼠肺动脉高压模型造模成功.  相似文献   

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目的:观察缬沙坦(valsartan)对野百合碱(monocrotaline)所致肺动脉高压大鼠肺血管重构的影响.方法:将健康雄性Wistar 大鼠随机分为3 组:M 组(肺动脉高压模型组)一次性项背部注射野百合碱(60 mg / kg)后自由摄食、饮水;V 组(缬沙坦干预组),同M 组注射野百合碱并同等条件饲养,4 周后开始用缬沙坦20 mg / (kg·d)灌胃,持续4 周达实验终点;C 组(正常对照组)一次性项背部注射等量生理盐水后与实验组同等条件饲养.然后经微导管介入测定大鼠肺动脉平均压(mPAP);计算右室肥大指数[RV/ (LV + S)];分别采用HE 染色、弹力纤维染色及VG 染色观察肺动脉结构的改变,计算肺动脉管壁厚度和管腔面积,评价缬沙坦对肺动脉重构的影响.结果:缬沙坦可有效降低野百合碱所致肺动脉高压大鼠模型肺动脉管壁的厚度,增大管腔面积(P < 0.01).结论:缬沙坦可有效抑制肺动脉高压大鼠肺动脉重构,作用机制可能与其抑制AngⅡ介导的增殖效应有关.  相似文献   

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背景肺的功能和结构改变致肺动脉高压是导致肺心病的先决条件,中药肺心合剂能够有效降低肺动脉高压,但其机制尚未完全阐明.目的比较不同剂量中药肺心合剂与硝苯地平对肺动脉高压大鼠肺血管重建的逆转效应.设计以实验动物为研究对象的随机对照实验研究.单位一所医科大学附属医院护理系、一所医学院附属医院、一所省级医院中医科.方法利用野百合碱(50 mg/kg)复制大鼠肺心病模型.雄性Wister大鼠60只,随机分为6组正常对照组、模型组、肺心合剂低、中、高剂量组及硝苯地平组,每组10只.分别于制模后14 d灌胃相应药物,连续用药8 d.处死动物后,利用特殊染色结合病理图象分析方法,测定肺小动脉病理及其形态计量学改变.主要观察指标①光镜观察及肺小动脉图象分析.②各组肺小动脉管壁中膜厚度,管壁中膜厚度与血管外径比值、管壁面积与血管总面积比值、管腔面积与血管总面积比值.结果肺心合剂及硝苯地平均能明显减轻模型大鼠的肺血管重构(P<0.01),以肺心合剂高剂量组效果最好.但治疗组各指标仍未完全恢复到正常对照组水平.结论肺心合剂能部分逆转肺血管结构重建,有效降低肺动脉高压.  相似文献   

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肺动脉高压尤其是特发性肺动脉高压(Idiopathic Pulrnonary Artery Hypertension, IPAH)是一种预后极差的疾病,其发病机制不明,治疗棘手。野百合碱(Monocrotatine,MCY)属于豆科植物野百合属,它所引起的肺动脉高压(Pulmonry Artery Hypertersion,PAH)大鼠是一种较为理想的肺动脉高压动物模型,在MCI-PAH动物模型大鼠血清中已发现内皮素-1(ET-1)、心钠素(ANP)及血栓素2(rXB2)明显升高,  相似文献   

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目的:探讨野百合碱(MCT)肺动脉高压(PAH)模型大鼠的血清能否引起实验大鼠肺动脉压力(PAP)的升高。方法:制备好单剂MCT腹腔内注射(60mg.kg-1)大鼠第14天的血清液(SB液)。试验组(SB组)大鼠40只阴茎静脉内注入SB液1~2ml,对照组(DB组)同样方法相同剂量注入正常大鼠的血清液(DB液),分别在第17天、22天、53天、60天观察两组大鼠平均肺动脉压(mPAP)和右室收缩压力(RVP)的改变。结果:与对照组相比,试验组大鼠第17天、22天、53天、60天两组mPAP与RVP无显著差异,但试验组上述两项指标均有升高趋势。结论:MCT处理的大鼠血清在近期内不能引起实验大鼠的mPAP的明显升高。  相似文献   

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肺心合剂对肺动脉高压模型大鼠的影响   总被引:4,自引:7,他引:4  
目的:探讨肺心合剂对野百合碱(MCT)诱发肺动脉高压模型大鼠的治疗作用。方法:利用MCT制备大鼠肺动脉高压模型。雄性Wistar大鼠60只,随机分为正常对照组、模型组、硝苯吡淀组以及肺心合刑高、中、低剂量组,每组10只。分别于制模后14d灌胃相应药物,连续用药8d。采用有心导管术测定肺血流动力学参数,计算平均肺动脉压(mPAP);处死动物后取肺脏称取肺湿质量,计算肺渗出指数和有心肥厚指数。结果:肺心合剂和硝苯吡淀都能明显降低肺动脉高压大鼠的mPAP、肺渗出指数和有心肥厚指数(P<0.05或P<0.01),以肺心合剂大剂量组效果最好。结论:肺心合剂能有效降低肺动脉高压,改善心功能。  相似文献   

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背景:肺的功能和结构改变致肺动脉高压是导致肺心病的先决条件,中药肺心合剂能够有效降低肺动脉高压,但其机制尚未完全阐明。目的:比较不同剂量中药肺心合剂与硝苯地平对肺动脉高压大鼠肺血管重建的逆转效应。设计:以实验动物为研究对象的随机对照实验研究。单位:一所医科大学附属医院护理系、一所医学院附属医院、一所省级医院中医科。方法:利用野百合碱(50mg/kg)复制大鼠肺心病模型。雄性Wister大鼠60只,随机分为6组:正常对照组、模型组、肺心合剂低、中、高剂量组及硝苯地平组,每组lO只。分别于制模后14d灌胃相应药物,连续用药8d。处死动物后,利用特殊染色结合病理图象分析方法,测定肺小动脉病理及其形态计量学改变。主要观察指标:①光镜观察及肺小动脉图象分析。②各组肺小动脉管壁中膜厚度.管壁中膜厚度与血管外径比值、管壁面积与血管总面积比值、管腔面积与血管总面积比值。结果:肺心合剂及硝苯地平均能明显减轻模型大鼠的肺血管重构(P&;lt;0.01)。以肺心合剂高剂量组效果最好。但治疗组各指标仍未完全恢复到正常对照组水平。结论:肺心合剂能部分逆转肺血管结构重建,有效降低肺动脉高压。  相似文献   

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目的:探讨硫化氢(H2S)对野百合碱(MCT)诱导的大鼠肺动脉高压(PAH)的影响,以及内皮间质转化(EndMT)在其中发挥的作用。方法:选择40只雄性SD大鼠,将其随机分为对照组、模型组、硫氢化钠(NaHS)组和炔丙基甘氨(PAG,H2S合成抑制剂)组。模型组、NaHS组和PAG组大鼠予以一次性腹腔注射MCT(60mg/kg)制备PAH模型,7d后,分别给予腹腔注射0.9%氯化钠溶液、NaHS(1mg·kg-1·d-1)、PAG(10mg·kg-1·d-1)干预14d。MCT注射21d后,通过右心导管检测各组大鼠肺动脉压力,随后处死大鼠,评估肺动脉重构和肺动脉EndMT情况。另将人肺动脉内皮细胞(HPAECs)予以0.9%氯化钠溶液或NaHS(50、100、200μmol/L)预处理2h,然后予以转化生长因子-β1(TGF-β1,10ng/mL)刺激1h、3d、10d,分别观察Snail的表达、EndMT情况及细胞形态学变化。结果:与对照组相比较,模型组大鼠的肺动脉收缩压(PASP)、平均肺动脉压(mPAP)、右心室肥厚指数(RVHI)、肺小动脉管壁厚度、肺组织α平滑肌肌动蛋白(α-SMA)、肺组织Snail水平均升高(P<0.05),血管内皮钙黏蛋白(VE-cadherin)表达水平降低(P<0.05)。予以NaHS干预后,这一趋势被逆转;而予以PAG干预后,相关指标则进一步恶化(P<0.05)。体外实验结果显示,TGF-β1刺激后,HPAECs梭形细胞增加,α-SMA、Snail表达升高(P<0.05),VE-cadherin表达减少(P<0.05);NaHS预处理可剂量依赖性地抑制TGF-β1诱导的HPAECs形态学变化及α-SMA、VE-cadherin和Snail表达水平变化。结论:H2S可减轻MCT诱导的PAH,其机制可能与其抑制肺动脉EndMT有关。  相似文献   

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BACKGROUND: Protein C inhibitor (PCI) plays a role in multiple biological processes including fertilization, coagulation, fibrinolysis and kinin systems. OBJECTIVES: We hypothesized that PCI participates in the pathogenesis of pulmonary hypertension. To demonstrate this, we compared the development of pulmonary hypertension in mice overexpressing PCI in the lung with wild-type (WT) mice. Pulmonary hypertension was induced by s.c. injection of 600 mg kg-1 of monocrotaline weekly for 8 weeks. RESULTS: Right ventricular arterial pressure was significantly increased in monocrotaline-treated WT mice compared with that in monocrotaline-treated transgenic mice. Bronchoalveolar lavage fluid (BALF) levels of thrombin-antithrombin complex, monocyte chemoattractant protein-1 and platelet-derived growth factor, and the plasma level of tumor necrosis factor-alpha were significantly increased in monocrotaline-treated WT mice as compared with monocrotaline-treated PCI transgenic mice. Increased level of PCI-thrombin complex was detected in BALF from monocrotaline-treated PCI transgenic mice as compared with saline-treated PCI transgenic mice. CONCLUSIONS: This study showed that increased expression of PCI in the lung is protective against monocrotaline-induced pulmonary hypertension, suggesting a potential beneficial effect of PCI for the therapy of this disease.  相似文献   

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肺心合剂对肺动脉高压大鼠肺血管重建的影响   总被引:10,自引:4,他引:10  
目的:探讨肺心合剂对野百合碱诱发肺动脉高压大鼠肺血管重建的影响.方法:利用野百合碱(50 mg/kg)复制大鼠肺心病模型.60只雄性Wistar大鼠随机分为正常对照组,模型组,肺心合剂低、中、高剂量组及硝苯地平组6组,每组10只.分别于制模后14 d灌胃相应药物,连续用药8 d.处死动物后,利用特殊染色结合病理图像分析方法测定肺小动脉病理(光镜下观察和弹力纤维染色切片)及其形态计量学(指标为与终末细支气管伴行的肺小动脉管壁中膜厚度、外径、管壁面积、室管腔面积以及与血管外径的比值).结果:肺心合剂及硝苯地平均能明显减轻模型大鼠的肺血管重构(P均<0.01),以肺心合剂高剂量组效果最好;但治疗组各指标仍未完全恢复到正常对照组水平.结论:肺心合剂能部分逆转肺血管结构重建,有效降低肺动脉高压.  相似文献   

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目的:检测肺动脉高压(PAH)大鼠肺动脉平滑肌细胞(PASMCs)上1,4,5-三磷酸肌醇受体(IP3R)的亚型及IP3R各亚型在PAH时表达水平的变化。方法;采用大鼠一次性腹腔注射野百合碱(MCT)60mg/kg复制PAH动物模型,用Western blot法检测IP3R亚型的表达及在PAH状态下其蛋白水平表达的变化。结果:大鼠PASMCs共同表达3个IP3R亚型,在PAH时IP3R1表达水平明显增高,约为对照组的2倍(P<0.01),而IP3R2和IP3R3的表达水平无明显变化。结论:PASMCs的IP3R1表达增强可能参与了PAH的发生。  相似文献   

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目的 探讨阿司匹林联合硝苯地平治疗妊娠期高血压患者的临床效果.方法 于2018年1月至2019年12月将我院产科60例妊娠期高血压患者纳入研究中,采用随机数字表法将患者分为对照组和观察组,各30例.对照组给予硝苯地平治疗,观察组给予硝苯地平联合阿司匹林治疗.比较两组的血压、凝血功能指标、血液流变学指标、血管内皮功能指标...  相似文献   

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目的研究硝苯地平联合卡托普利治疗原发性高血压的疗效。方法收集本院收治的原发性高血压患者临床资料,在给予硝苯地平联合卡托普利治疗后,监测患者的血压、蛋白尿以及高血压引起的心绞痛缓解情况。结果用药后,2组平均血压值均发生明显下降,治疗组疗效明显好于对照组。对照组心绞痛的缓解情况明显好于治疗组,而治疗组治疗后24 h尿蛋白明显下降,低于对照组。结论硝苯地平和卡托普利对于原发性高血压有较好疗效,总体有效率达到95%,尤其对于伴有蛋白尿的高血压患者能够显著改善蛋白尿的状况。  相似文献   

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The hallmark features of the development of pulmonary arterial hypertension (PAH) include the proliferation of pulmonary vascular smooth muscle cells, oxidative stress, inflammation, and pulmonary artery remodeling. Arctigenin is a bioactive component of Arctium lappa that exerts anti-inflammatory and antiproliferative effects in several diseases; however, its effects on pulmonary arteries are still unclear. This study aimed to investigate the efficacy of arctigenin to prevent PAH. Rats injected with monocrotaline (MCT) progressively developed PAH. Arctigenin treatment (50 mg per kg per day, intra-peritoneally) ameliorated right ventricular systolic pressure and pulmonary arterial remodeling, decreased the expression of inflammatory cytokines, and limited the proliferation of pulmonary vascular smooth muscle cells in lungs. Mechanistically, arctigenin effectively inhibited the MCT-induced elevation of NLRP3, caspase-1, and interleukin 1-beta expression in the lungs. These results indicate that arctigenin ameliorates MCT-induced PAH, at least in part, through exerting its anti-inflammatory, antioxidant, and antiproliferative effects, which inhibit the NLRP3 inflammasome signal pathway in rats.

Arctigenin ameliorates monocrotaline-induced pulmonary arterial hypertension, at least in part, through exerting its anti-inflammatory, antioxidant, and antiproliferative effects, which inhibit the NLRP3 inflammasome signal pathway in rats.  相似文献   

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Background

To assess changes in right heart flow and pulmonary artery hemodynamics in patients with repaired Tetralogy of Fallot (rTOF) we used whole heart, four dimensional (4D) velocity mapping (VM) cardiovascular magnetic resonance (CMR).

Methods

CMR studies were performed in 11 subjects with rTOF (5M/6F; 20.1 ± 12.4 years) and 10 normal volunteers (6M/4F; 34.2 ± 13.4 years) on clinical 1.5T and 3.0T MR scanners. 4D VM-CMR was performed using PC VIPR (Phase Contrast Vastly undersampled Isotropic Projection Reconstruction). Interactive streamline and particle trace visualizations of the superior and inferior vena cava (IVC and SVC, respectively), right atrium (RA), right ventricle (RV), and pulmonary artery (PA) were generated and reviewed by three experienced readers. Main PA net flow, retrograde flow, peak flow, time-to-peak flow, peak acceleration, resistance index and mean wall shear stress were quantified. Differences in flow patterns between the two groups were tested using Fisher's exact test. Differences in quantitative parameters were analyzed with the Kruskal-Wallis rank sum test.

Results

4D VM-CMR was successfully performed in all volunteers and subjects with TOF. Right heart flow patterns in rTOF subjects were characterized by (a) greater SVC/IVC flow during diastole than systole, (b) increased vortical flow patterns in the RA and in the RV during diastole, and (c) increased helical or vortical flow features in the PA's. Differences in main PA retrograde flow, resistance index, peak flow, time-to-peak flow, peak acceleration and mean wall shear stress were statistically significant.

Conclusions

Whole heart 4D VM-CMR with PC VIPR enables detection of both normal and abnormal right heart flow patterns, which may allow for comprehensive studies to evaluate interdependencies of post-surgically altered geometries and hemodynamics.  相似文献   

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目的探讨法舒地尔对大鼠重度肺动脉高压及其组织病理改变的影响。方法左肺切除+野百合碱注射建立大鼠重度肺动脉高压模型,雄性SD大鼠60只随机分为5组,A组为对照组,B组为肺动脉高压组,C,D,E组分别为法舒地尔30,50,100mg/(kg.d)干预肺动脉高压组。对各组大鼠进行生存分析,测量平均肺动脉压力、股动脉收缩压、右心室肥厚指数;弹力纤维染色分析肺血管病变;免疫组织化学法检测肺动脉平滑肌细胞凋亡率。结果 C,D,E组生存率明显高于B组,C及D组生存率高于E组(P<0.05);4周后,C,D,E组平均肺动脉压力较B组明显降低,肺动脉中膜肥厚、内膜增生较B组明显减轻,肺动脉平滑肌细胞凋亡率较B组明显升高(P均<0.05);C及D组右心室肥大指数较B组降低(P<0.05);E组动脉收缩压较B组明显下降(P<0.05)。结论中、小剂量法舒地尔可改善重度肺动脉高压大鼠的预后、逆转右心室肥厚及不同类型的肺血管病变。  相似文献   

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