首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
目的探索人胎盘微血管内皮细胞的体外培养方法,并对其进行鉴定,为构建体外人胎盘屏障极性模型奠定基础.方法采用酶消化法,获取组织及细胞悬液,经密度梯度离心后,获得较高产量微血管内皮细胞,并进行体外培养.进一步对人胎盘微血管内皮细胞进行免疫细胞化学法的Ⅷ因子相关抗原及CD34鉴定,用透射电镜观察细胞质Weibel-Palade小体.结果体外培养出纯度较高的微血管内皮细胞并培养了3~5代.此外,免疫组化显示Ⅷ因子相关抗原及CD34表达阳性,电镜下观察到Weibel-Palade小体.结论成功分离并培养人胎盘微血管内皮细胞.  相似文献   

2.
组织块法培养大鼠肺微血管内皮细胞的综合鉴定   总被引:6,自引:2,他引:6  
目的 为组织块法培养的大鼠肺微血管内皮细胞(rat pulmonary microvascular endothelial cells,RPMVECs)建立合理可靠的多指标综合鉴定方案.方法 采用外周肺组织贴块法培养RPMVECs,抽取组织块进行切片观察,以大鼠肺动脉平滑肌细胞和人脐静脉内皮细胞为对照,对培养细胞进行CD34、植物凝集素BSI、Ⅷ因子相关抗原免疫细胞化学鉴定,通过光镜和透射电镜观察细胞形态和超微结构.结果 组织切片显示组织块源于外周肺组织,CD34免疫细胞化学染色阳性,植物凝集素BSI结合试验阳性,而Ⅷ因子相关抗原染色阴性,透射电镜未见Weibel-Palade小体.结论 Ⅷ因子相关抗原和Weibel-Palade小体并非RPMVECs鉴定的理想指标,联合应用外周肺组织切片、CD34和植物凝集素BSI三指标为组织块法培养的RPMVECs提供了一个简单易行、合理、可靠的综合鉴定方案.  相似文献   

3.
目的 观察第Ⅷ因子相关抗原(FⅧ-RAg)和CD34对卵巢移植物新生血管标记的敏感性,为移植物血管生成的观察提供有用的技术方法.方法 采用CD34和FⅧ-RAg免疫组化法对移植卵巢和移植部位进行染色,镜下观察其显示新生内皮细胞的特异性和着色强度.结果 CD34阳性细胞主要位于移植物内,细胞较大.FⅧ-RAg阳性细胞存在于肾脏和移植物内,多为成熟的长梭型内皮细胞,且阳性细胞总数明显多于CD34.结论 CD34适用于显示移植卵巢的新生血管内皮细胞.  相似文献   

4.
兔脑微血管内皮细胞的培养及鉴定   总被引:2,自引:0,他引:2  
目的:建立简便、有效的兔脑微血管内皮细胞体外原代培养方法。方法:兔脑皮质通过匀浆、过筛分离处理后接种,原代培养兔脑微血管内皮细胞,并通过Ⅷ因子相关抗原免疫组化染色和透射电镜观察鉴定。结果:培养的细胞呈典型的“铺路石”状生长,Ⅷ因子相关抗原免疫组化染色为阳性。结论:该方法可方便获取较纯净的脑微血管内皮细胞。  相似文献   

5.
目的 原代培养人视网膜微血管内皮细胞(HRCECs),并探索其是否具有HIV-1 gp120结合细胞的主要受体:CD4、CXCR4和CCR5.方法 原代培养HRCECs,采用免疫组织化学和免疫荧光法鉴定特征性的第Ⅷ因子相关抗原,以及CD4、CXCR4和CCR5受体的表达情况. 结果 原代培养的HRCECs,通过免疫组化和免疫荧光的方法 ,均可见其特征性的第Ⅷ因子相关抗原的表达,而CD4受体为阴性,但CXCR4和CCR5受体在细胞浆上均有阳性分布.结论 原代培养可获得高纯度的HRCECs,均有特征性的第Ⅷ因子相关抗原表达,且有HIV辅助受体CXCR4和CCR5阳性分布,可能为HIV-1 gp120侵犯HRCECs破坏血视网膜屏障提供靶点.  相似文献   

6.
目的探索人肾小球微血管内皮细胞的体外培养方法和鉴定。方法先用梯度筛网法获得高纯度肾微血管球,采用胶原酶消化法从肾微血管球内获取内皮细胞,再用单克隆增殖法进行纯化、体外培养;采用免疫组化法测定Ⅷ因子相关抗原,并在透射电镜下观察Weibel-Palade小体进行鉴定。结果体外培养出高纯度人肾小球微血管内皮细胞并传代培养12代。该细胞Ⅷ因子相关抗原阳性、细胞浆中可见Weibel-Palade小体。结论本实验成功培养出人肾小球微血管内皮细胞,并予以传代。  相似文献   

7.
目的研究人血管瘤内皮祖细胞(EPcs)在裸鼠体内分化情况,进一步揭示其生物学特性。方法组织块法体外培养增生期血管瘤内皮祖细胞(经CD31、CD34及Ⅷ因子相关抗原鉴定),浓集后分别种植于裸鼠双侧胸壁、腰部皮下,动态观察移植瘤生长情况及组织学变化,并用血管内皮细胞特异性标志物鼠抗人CD31、CD34免疫组化单克隆抗体染色研究所成瘤体的同源性。结果体外培养血管瘤内皮祖细胞生长良好,细胞计数为3×108个/培养瓶,CD31、CD34及Ⅷ因子相关抗原免疫组化检测阳性表达,裸鼠皮下植入后所形成的瘤体与原血管瘤生物学特点及病理特征相似,经CD31、CD34鉴定瘤体来源于人血管瘤内皮细胞。结论内皮祖细胞是血管瘤发生的细胞来源,此可作为血管瘤的动物模型,为血管瘤的研究提供较理想平台。  相似文献   

8.
免疫组化方法检测猪与人皮肤通用抗原标志   总被引:1,自引:0,他引:1  
目的:探讨猪与人皮肤组织蛋白抗原性的差异。方法:人和小猪全厚正常皮肤做冰冻切片,用抗人皮肤组织相关抗原(HLA-ABC,HLA-DR,Vimentin,Desmin,Actin,FⅦRA,Cytokeratin)、细胞因子及其受体和胞外基质(Hyaluronic acid,Fibronectin,Laminin,Type Ⅳ collagen,Estradiol-17β和Tstosterone)及I、Ⅲ、Ⅶ型胶原等抗原成分的单克隆或多克隆抗体进行免疫组化染色,比较猪与人皮肤组织抗原性异同。结果:在猪皮肤组织可检测到I、Ⅲ、Ⅳ、Ⅶ型胶原和Hyaluronic acid,Fibronectin,Laminin,FⅧRA,Cytokeratin,IL-6,IL-8,Estradiol-17β,Tstosterone和ICAM-1;多克隆抗体阳检率明显高于单克隆抗体;其中细胞外基质成分和分子量较小的细胞因子,以及结构或功能原始的蛋白分子在猪与人皮肤有较好的同潭性,而进化较大的蛋白分子(如细胞因子或激素的受体和淋巴细胞CD分子等)则多为阴性,显示抗体-抗原结合反应的特异性及其种族差异。结论:猪与人皮肤组织抗原之闻存在很大的差异,猪血管内皮细胞表迭人ICAM-1,提示二者粘附分子可能存在物种间的交叉,可能与异种皮肤移植难以存活有关。本研究为异种脱细胞真皮基质的临床应用提供了有用的资料。  相似文献   

9.
目的:探讨JAK/STAT途径活化与白血病HL-60细胞增殖的相关性。方法分别利用二烯丙基二硫( DADS)、ATRA、AG490处理体外培养的HL-60细胞,检测给药前后抗原CD11b分化能力、NBT还原能力;Western blot法检测JAK/STAT家族中与DADS诱导增殖相关的蛋白表达情况;免疫组化法检测转录因子c-jun、c-fos、c-myc、STAT的蛋白表达水平。结果 DADS可显著提高HL-60细胞分化能力;随着DADS浓度增加, NBT还原能力下降,且低于ATRA、AG490处理组;经不同浓度DADS处理, HL-60细胞中JAK/STAT家族成员JAK1/STAT3磷酸化水平随DADS浓度升高而降低;经免疫组化分析显示,STAT3、c-myc的蛋白水平受DADS抑制,而c-fos、c-jun的蛋白则可受DADS作用表达升高。结论 DADS通过激活JAK/STAT信号通路抑制白血病HL-60细胞增殖。  相似文献   

10.
为建立一种检测瘤内血管生成准确定量的新方法,采用抗CD34单克隆抗体标记实体肿瘤组织中的血管内皮细胞,运用流式细胞术进行定量分析;并采用免疫组化法定量瘤内微血管密度,比较两种方法检测值的相关性.结果显示流式细胞术实验组与对照组平均检测值(%)具有显著性差异(P<0.001);其相关性分析提示流式细胞术内皮细胞百分比与免疫组化法微血管计数值紧密相关(CD34,r=0.913, P<0.001;Ⅷ因子相关抗原,r=0.868,P<0.001).以上可见,流式细胞术可用于准确、快速、定量地检测实体肿瘤组织中的血管内皮细胞.  相似文献   

11.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

12.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

13.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

19.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

20.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号