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1.
肺动脉内皮细胞的分离、培养和鉴定   总被引:8,自引:0,他引:8  
以新生小牛肺动脉为材料,采用灌流抽洗-0.1%胶原酶消化法分离出小牛肺动脉内皮细胞。以199培养液培养并巳传6代,生长率、分裂指数、对数生长期群体倍增时间均与国外报道近似,冻存后复苏率为84.2±8.3%。通过形态学特征和凝血Ⅷ因子相关抗原检测证实是内皮细胞。纤维连接蛋白或鼠尾胶原作培养基质可显著提高该细胞的贴壁率。牛下丘脑和牛视网膜来源的促生长物有显著促内皮细胞生长作用。该细胞体外培养方法的建立,为体外研究肺血管内皮细胞的功能、代谢及病理变化提供了可靠模型。  相似文献   

2.
目的:探索建立稳定有效的脐静脉内皮细胞体外培养方法。方法:用0.1%II型胶原酶消化分离人脐静脉肉皮细胞,加入含内皮细胞生长因子的M199完全培养液中培养,用胰蛋白酶-EDTA进行消化传代培养,用光镜和免疫组化方法对培养的细胞进行形态观察和鉴定。结果:原代培养的内皮细胞在接种后24h后完全贴壁生长,第445天后融合呈铺路石样镶嵌排列,免疫组化可见胞浆中第Ⅷ因子相关抗原呈阳性反应,证实培养的细胞为内皮细胞。结论:脐静脉灌注II型胶原酶消化法配合M199完全培养液可获得高纯度的内皮细胞,细胞可传代5—6次,但细胞产出量不高,不能传10代以上,5代以后细胞形态变化较大,对于复杂的基础研究应用受限。  相似文献   

3.
大鼠脑微血管内皮细胞的分离与原代培养   总被引:14,自引:0,他引:14  
为了建立大鼠脑微血管内皮细胞体外培养模型,探索纯度较高的大鼠脑微血管内皮细胞分离和原代培养的方法并进行形态学观察。采用2~3周龄的SD大鼠,解剖得到大脑皮质,两次酶消化及牛血清白蛋白或葡聚糖和Percoll梯度离心获得较纯的脑微血管段后,接种于涂布基质的培养皿进行原代培养;培养的细胞采用相差显微镜形态学观察、透射电镜观察及Ⅷ因子相关抗原免疫组化检测鉴定。结果发现,培养12h即可见细胞从贴壁的脑微血管段周围长出,细胞呈短梭形,区域性单层生长,5~7天内皮细胞融合,内皮细胞纯度达90%以上;内皮细胞的贴壁和生长有赖于所涂布的基质,纤连蛋白/Ⅳ型胶原优于鼠尾胶和明胶;Ⅷ因子相关抗原免疫组化检测内皮细胞表达阳性,透射电镜观察可见相邻内皮细胞间存在紧密连接结构。提示该方法能成功进行纯度较高的大鼠脑微血管内皮细胞原代培养,可用于脑微血管内皮的生理、生化及药理学研究,亦可用于构建大鼠血脑屏障模型。  相似文献   

4.
探讨新生大鼠肺成纤维细胞原代培养的改良方法及细胞鉴定。用胰酶消化组织块结合的方法提取新生大鼠肺成纤维细胞,并纯化细胞,对肺成纤维细胞进行形态学观察,用HE染色及免疫组化染色法对细胞进行鉴定,并用MTT法测定细胞生长曲线。倒置相差显微镜下观察选用改良法获得的细胞,3 d后可见组织块周边有少许细胞,5 d后组织块周围有大量细胞爬出,生长迅速,10 d接近融合。经改良后的方法纯化细胞,细胞活性状态较好的为3~5代,5代以后的细胞增殖能力下降。对第3代肺成纤维细胞进行HE染色,镜下可见形态典型的成纤维细胞,免疫组化结果显示波形蛋白(Vi-mentin)阳性表达,细胞角蛋白(cytokeratin)阴性表达。MTT法检测第3代细胞于3~5 d处于对数生长期。胰酶消化组织块结合法是一种可靠快速的肺成纤维细胞分离纯化的培养方法,使用这种方法可得到具有典型形态特征且活性较好的肺成纤维细胞,初学者容易掌握。  相似文献   

5.
恒河猴静脉内皮细胞培养的研究   总被引:1,自引:0,他引:1  
利用胶原酶对恒河猴血管内皮细胞进行消化,以9.92±3.34×10~3个细胞/cm~2的接种率接种于35mm培养皿中原代培养,体外培养7.7±1.82天,细胞增长了7.39±5.04倍,以1:6及1:2比例分别传第一代、第二代共历时13.89±1.36天细胞增长了147.93±88.68倍。对原代及传代细胞进行染色体及第Ⅷ因子相关抗原免疫荧光检查,证实所培养的细胞为内皮细胞。通过检测培养上清中vWF和PGF1α的含量,原代、第一代与第二代之间均无明显差异(P>0.05)。  相似文献   

6.
目的 建立树鼩视网膜来源的微血管内皮细胞的体外分离培养技术以及永生化细胞株,为体外利用树鼩视网膜微血管内皮细胞开展相关研究提供新的实验材料。方法 利用Ⅱ型胶原酶、分散酶和DNaseⅠ酶消化法分离培养出原代视网膜微血管内皮细胞,利用差速消化法纯化内皮细胞,然后利用携带SV40T基因的慢病毒转染细胞,再挑取单克隆后进行传代培养。对传至50代以上的细胞进行形态学观察、免疫荧光鉴定以及核型鉴定。结果 采用混合酶消化法能够分离获得微血管内皮细胞,纯化后的细胞呈不规则多角形和梭形。经慢病毒转染后的细胞传代培养后细胞形态一致,到第50代时细胞形态结构仍较好。细胞免疫荧光结果显示标志性蛋白VWF、CD34、Claudin1、ZO-1和永生化SV40T表达阳性。生长曲线结果显示:细胞生长旺盛,第2~4天时处于对数生长期,第4天进入平台期。细胞核型结果显示:染色体数与树鼩染色体相同,即所获取的细胞为永生化的树鼩视网膜微血管内皮细胞。结论 成功建立的树鼩视网膜微血管内皮细胞永生化细胞株具有较好的形态结构与功能,为视网膜病变及眼科相关疾病的研究提供了新的实验材料。  相似文献   

7.
鼠脑微血管内皮细胞的分离与长期培养   总被引:15,自引:1,他引:14  
采用胶原酶消化、差速离心、尼龙网滤过技术分离和获取鼠脑微血管内皮细胞,接种后4h换液使获得的内皮细胞纯化,体外进行长期培养。细胞在体外生长176天,传至30代,细胞初期成活率为92%,纯度近90%。经形态学、超微结构和免疫组化鉴定,培养细胞为血管内皮细胞。培养至第30代的细胞仍能合成和分泌PGI2、ACE等,ⅧF:Ag阳性表达,染色体为二倍体(2n=42),基本保持着细胞的主要特征。该分离和培养方法的建立,将为研究与脑血管相关疾病提供有用工具。  相似文献   

8.
目的:探索大鼠主动脉原代内皮细胞体外培养方法,为体外研究提供细胞模型。方法:分离大鼠主动脉,直接贴壁于培养皿中,荧光倒置显微镜观察细胞形态,免疫组化Ⅷ因子相关抗原染色鉴定细胞。结果:约24小时组织块边缘有游离的新生细胞长出,7天即融合成片。消化传代后细胞呈短梭形或三角形,单层生长,铺路石状,Ⅷ因子表达阳性,呈指数增殖。冻存后复苏细胞活性均超过90%。结论:用贴壁法成功建立了大鼠血管内皮细胞体外培养方法,冻存细胞存活率高,为体外研究提供了稳定的模型。  相似文献   

9.
目的:骨髓分化细胞预种植,探讨增强人工血管内皮化方法.方法:选取选杂种犬8条.每组实验犬2条.实验犬采自体骨髓,定向分化提取培养为内皮细胞,种植人工血管内膜表面.对照犬采用血清和培养基预凝支架.将人工血管重建犬右室流出道,于术后第1、3月观察植入的人工血管通畅情况,采用免疫组织化学方法鉴定细胞,在光镜和电镜下观察人工血管新生内膜表面内皮化情况.结果:骨髓细胞分化后鉴定,第2带细胞CD34染色阳性,第5代细胞CD31、Ⅷ因子染色阳性.细胞种植人工血管7天内皮细胞覆盖.光镜观察植入后1月实验组部分内皮化.对照组无内皮细胞覆盖;术后第3月实验组基本实现内皮化,对照组少量内皮细胞覆盖,存在钙化灶.1月实验组扫描电镜显示细胞排列紧密,对照组细胞少,有少量血栓附着;3月实验组血管表面细胞排列成片,对照组部分覆盖.结论:骨髓细胞定向分化所获取为内皮细胞.内皮细胞种植于去细胞后牛颈静脉血管,可获得较理想的内皮化,减少体内不良反应发生.  相似文献   

10.
用二乙基亚硝胺(DEN)诱发大鼠肝癌,取肝癌白色结节,0.25%胰酶消化,RPMI—1640培养基建系成功,共获13系肝癌细胞系,经反复传代(10代以上),细胞系均以肝实质瘤细胞和胆管上皮癌细胞为主,另外夹杂少量成纤维细胞。用PH7.2的PBS冲洗、75%酒精消毒流式细胞仪(FCM)后,纯化该细胞来.收集肝实质癌细胞系,用60Coγ射线辐照,剂量为800Rad和1000Rad,结果800Rad剂量使肝实质癌细胞生长受到明显抑制,细胞传代时间延长一倍,1000Rad剂量使细胞生长停止,不能再行传代。  相似文献   

11.
目的探讨脑脊液中转移腺癌细胞在没有血供的条件下的生长特征,是否有血管内皮标记物CD34,CD105,FⅧ,淋巴管内皮标记物D2_40及碱性成纤维生长因子(b-FGF)的表达,并促进肺癌的脑转移及肿瘤细胞自我生存的调控。方法采集109例腺癌脑转移患者的脑脊液为研究对象,其中肺癌脑转移107例(包括49例肺癌术后5年内脑转移,58例无肺癌病史直接经脑脊液穿刺发现肺癌脑转移),乳腺癌2例。以40例主要成分为炎性细胞的脑脊液及40例原发性肺腺癌组织标本为对照,采用免疫化学染色方法检测脑转移腺癌细胞及腺癌组织中CD34,CD105,FⅧ,D2_40,b-FGF,VEGF及vimentin的表达。结果 109例脑脊液标本中,CD34,CD105,FⅧ,D2_40,b-FGF及VEGF在转移癌细胞中的阳性率分别为64.2%,67.9%,66.9%,63.8%,56.8%,70.6%明显高于脑脊液对照组(阳性率均为0)且差异具有统计学意义(P0.05)。vimentin在脑脊液转移腺癌细胞中阳性表达,表达率为88.1%。在原发肺癌标本中,CD34,CD105,FⅧ和VEGF表达较弱或不表达。D2-40在癌中不表达。B-FGF与Vimentin在原发肺腺癌中的表达率分别为50.1%和29.3%。结论在肺癌脑转移过程中,肿瘤细胞能够表达不同的血管生长因子,提示可能具备内皮细胞的生物学特性,可能有助于增强肿瘤细胞的转移能力和对环境的耐受能力。  相似文献   

12.
多聚体von Willebrand因子(vWF)的功能之一是保护凝血Ⅷ因子(FⅧ)免受蛋白水解引起的快速清除.前肽缺失突变体vWF (vWF-ΔPro)不能形成多聚体,但可以结合FⅧ蛋白.为探讨vWF-ΔPro对基于蛋白质反式剪接作用介导的双载体转FⅧ基因后连接的FⅧ蛋白的分泌和活性的影响,将vWF-ΔPro基因和融合Ssp DnaB内含肽的B结构域缺失型FⅧ(BDD-FⅧ)断裂基因共转染293细胞进行转基因的瞬时表达,用Western印迹检测了单独转染vWF-ΔPro基因细胞的vWF-ΔPro表达量和蛋白形式,并检测了其对FⅧ的结合力;用ELISA法观察分泌至培养上清中的剪接的BDD-FⅧ,并用Coatest法检测由其产生的生物活性.结果显示,vWF-ΔPro转基因细胞呈现二聚体蛋白表达形式,其结合FⅧ的能力与转野生型vWF基因细胞相近;vWF-ΔPro共转染细胞上清中剪接BDD-FⅧ蛋白浓度为198±21 ng/mL,活性为1.78±0.18 IU/mL,明显高于未转染vWF-ΔPro基因的细胞对照(91±12 ng/mL和1.05±0.13 IU/mL),与共转染野生型vWF基因细胞对照相近(221±19 ng/mL和1.95±0.22 IU/mL),表明vWF-ΔPro可显著改善内含肽剪接的BDD-FⅧ蛋白的分泌和生物活性.为vWF-ΔPro转基因的基于蛋白质剪接技术双AAV载体转BDD-FⅧ基因动物体内实验提供了依据.  相似文献   

13.
为了构建含人凝血因子Ⅷ基因的重组腺病毒载体系统,首先构建了含FⅧ(B结构域缺失型)的载体质粒pAd-hFⅧ和插入内含子结构的pAdI-hFⅧ,经脂质体介导,证明两质粒的目的基因均能在COS-7细胞中表达有凝血活性的FⅧ因子,其中经纯化的载体质粒pAd-hFⅧ与pBHG10经脂质体介导,共转染至293包装细胞,经同源重组和E1蛋白反式互补,形成E1/E3缺失型重组腺病毒载体颗粒Ad-hFⅧ.PCR检则到病理293培养液上清的病毒DNA中具有目的基因扩增片段,证明病毒DNA含有FⅧ基因.经扩增、纯化、滴度测定,用于感染离体细胞COS-7、A549、L929、293.证实该病毒能在上述细胞中高效转移和表达目的基因,其表达量具有一定范围内的剂量依赖性.COS-7细胞中,MOI>1000时,有细胞毒效应,表达量反而下降.经耳缘静脉注射Ad-hFⅧ至家兔后,1~4周能测到一定水平的FⅧ蛋白,1周内升至最高峰.免疫组化研究表明感染的离体细胞和家兔肝等组织均有FⅧ表达,其中肝脏表达最高.为甲型血友病的基因治疗开辟了新途径  相似文献   

14.
Acute kidney injury induces the loss of renal microvessels, but the fate of endothelial cells and the mechanism of potential vascular endothelial growth factor (VEGF)-mediated protection is unknown. Cumulative cell proliferation was analyzed in the kidney of Sprague-Dawley rats following ischemia-reperfusion (I/R) injury by repetitive administration of BrdU (twice daily) and colocalization in endothelial cells with CD31 or cablin. Proliferating endothelial cells were undetectable for up to 2 days following I/R and accounted for only ~1% of BrdU-positive cells after 7 days. VEGF-121 preserved vascular loss following I/R but did not affect proliferation of endothelial, perivascular cells or tubular cells. Endothelial mesenchymal transition states were identified by localizing endothelial markers (CD31, cablin, or infused tomato lectin) with the fibroblast marker S100A4. Such structures were prominent within 6 h and sustained for at least 7 days following I/R. A Tie-2-cre transgenic crossed with a yellow fluorescent protein (YFP) reporter mouse was used to trace the fate of endothelial cells and demonstrated interstititial expansion of YFP-positive cells colocalizing with S100A4 and smooth muscle actin following I/R. The interstitial expansion of YFP cells was attenuated by VEGF-121. Multiphoton imaging of transgenic mice revealed the alteration of YFP-positive vascular cells associated with blood vessels characterized by limited perfusion in vivo. Taken together, these data indicate that vascular dropout post-AKI results from endothelial phenotypic transition combined with an impaired regenerative capacity, which may contribute to progressive chronic kidney disease.  相似文献   

15.
We have used chimeras and point mutations of recombinant coagulation factor IX to examine factor IX's specific interaction with bovine endothelial cells. Previously (Toomey, J. R., Smith, K. J., Roberts, H. R., and Stafford, D. W. (1992) Biochemistry 31, 1806-1808), we restricted the region of factor IX responsible for binding to endothelial cells to its Gla domain. Molecular modeling of the Gla domain of factor IX using the coordinates of the Gla domain of bovine prothrombin-(1-145) (Soriano-Garcia, M., Padmanabhan, K., deVos, A. M., and Tulinsky, A. (1992) Biochemistry 31, 2554-2566) reveals two major surface determinants whose sequences differ among factors IX, X, and VII. A chimeric protein comprised of the Gla domain of factor VII with the remainder of the molecule of factor IX did not bind to the endothelial cell binding site. We changed residues 33, 34, 35, 39, and 40 to those of factor IX without restoring endothelial cell binding. Replacement of amino acid residues 3-10 with those of factor IX restored normal binding. With the knowledge that specific binding was localized to the first 11 amino acids, point mutations were made at residues predicted to be on the surface in this region of the factor IX molecule. Changing lysine 5 to alanine (K5A) or valine 10 to lysine (V10K) resulted in loss of binding with total retention of in vitro clotting activity. The lysine 5 to arginine (K5R) mutation also was fully active in vitro but displayed 3-fold tighter binding. In addition to defining the sequence of factor IX necessary for binding to endothelial cells, these results suggest that the binding site is not phospholipid but instead is specific, and in all likelihood, protein.  相似文献   

16.
The pathophysiological hallmark of spotted fever group rickettsioses comprises infection of endothelial cells with subsequent infiltration of inflammatory cells. Based on its ability to promote inflammation and endothelial cell activation, we investigated the role of CD40L in African tick bite fever (ATBF), caused by Rickettsia africae, using different experimental approaches. Several significant findings were revealed. 1) Patients with ATBF (n = 15) had increased serum levels of soluble CD40 ligand (sCD40L), which decreased during follow-up. 2) These enhanced sCD40L levels seem to reflect both direct and indirect (through endothelial cell activation involving CX3CL1-related mechanisms) effects of R. africae on platelets. 3) In combination with sCD40L, R. africae promoted a procoagulant state in endothelial cells by up-regulating tissue factor and down-regulating thrombomodulin expression. 4) Although the R. africae-mediated activation of platelets involved TLR2, the combined procoagulant effects of R. africae and sCD40L on endothelial cells involved TLR4. 5) Doxycycline counteracted the combined procoagulant effects of R. africae and sCD40L on endothelial cells. Our findings suggest an inflammatory interaction between platelets and endothelial cells in ATBF, involving TLR-related mechanisms. This interaction, which includes additive effects between sCD40L and R. africae, may contribute to endothelial inflammation and hypercoagulation in this disorder.  相似文献   

17.
K Kaji 《Human cell》1988,1(2):188-197
The purpose of this review is to introduce a simple and inexpensive culture method for human umbilical blood vessel endothelial cells. The medium used is MCDB-104 supplemented with 10% fetal bovine serum, 70 ng/ml endothelial cell growth factor from new-born bovine brains, 10 ng/ml murine epidermal growth factor, and 100 micrograms/ml heparin. The culture dishes are coated with gelatin. Under these conditions, endothelial cells from human vessels were grown with doubling times of 18-22 hrs and reached saturation densities of 8-12 x 10(4) cells/cm2. To determine the lifespan of the endothelial cells, the cells were serially subcultivated weekly at an inoculum size of 1,000 cells/cm2. Human endothelial cells from umbilical vein and artery were grown for 21 to 37 passages with 55 to 125 population doublings. This culture method seems to be useful for studying cell proliferation and functions of human endothelial cells.  相似文献   

18.
Long-term culture of human endothelial cells   总被引:9,自引:0,他引:9  
Human umbilical vein endothelial cells can be grown in vitro for 28 passages (CPDL 58) in Medium 199 supplemented with newborn bovine serum and a partially purified growth factor derived from bovine brain. Newborn bovine serum is superior to fetal bovine serum for the proliferation of human umbilical vein endothelial cells seeded at low density in the presence of the growth factor. The endothelial cells, which can be passaged every 7 to 10 d at a 1-to-5 split ratio, retain their morphological and biochemical characteristics. The proliferation of cells seeded at low density (10(3)/cm2) is proportional to the concentration of the growth factor present in the medium. The growth factor, which has an isoelectric point between 5.0 and 5.5, can support cell proliferation at reduced serum concentrations; half-maximal growth is achieved in medium containing the growth factor and 3% serum. The brain endothelial cell growth factor does not stimulate DNA synthesis significantly in cultures of human skin fibroblasts.  相似文献   

19.
We examined the tumor necrosis factor alpha (TNFalpha)-induced apoptosis of vascular endothelial cells from the standpoint of ion channels. Cultured vascular endothelial cells from bovine carotid artery were used. Apoptosis was determined by a propidium iodide assay. Treatment of the endothelial cells with TNFalpha and cycloheximide for 6 h induced nuclear fragmentation in a TNFalpha dose-dependent manner (1-10 ng/ml). Concomitant treatment of endothelial cells with TNFalpha at a dose of 10 ng/ml and cycloheximide at a dose of 10 microg/ml elicited endothelial cell apoptosis as high as 23.4+/-4.1% at 6 h after administration. However, 10 ng/ml TNFalpha alone elicited a little apoptosis at 6 h after its administration (% apoptosis=4.1+/-0.8%). Cycloheximide (10 microg/ml) did not induce apoptosis at all. Concomitant treatment of endothelial cells with 1 mmol/l of 4,4-diisothiocyanatostilbene-2,2-disulfonic acid, which is a chloride bicarbonate exchanger blocker, partially inhibited the TNFalpha and cycloheximide-induced endothelial cell apoptosis. On the other hand, endothelial cell apoptosis due to TNFalpha and cycloheximide was completely inhibited by benzyloxycarbonyl-Asp-CH2OC(O)-2,6-dichlorobenzene (50 micromol/l), an inhibitor of caspase. Moreover, pyrrolidine dithiocarbanate, an inhibitor of nuclear factor kappa B (NF-kappaB), also suppressed endothelial cell apoptosis induced by TNFalpha and cycloheximide completely. These findings suggest that the endothelial cell apoptosis induced by TNFalpha and cycloheximide is closely related to not only chloride ions, but also both NF-kappaB and caspase activation. That is to say, there is a possibility that chloride ions or bicarbonate (pH) may play an important role in signal transduction such as NF-kappaB and caspase activation in the apoptosis induced by TNFalpha and cycloheximide.  相似文献   

20.
Summary Human dermal microvascular endothelial cells are used to analyze the functions of microvascular endothelium in vitro. However, the low yield and short lifespan of these cells in culture has limited the types of analysis that could be performed. Human microvascular endothelial cells are typically grown in media containing supplements such as dibutyryl cyclic AMP, hydrocortisone, bovine brain extract, and antifungal agents, each of which increase the complexity of experimental design and interpretation of results. In the present study, endothelial cells were transferred after Ulex europeus-I selection into a simplified medium consisting of Endothelial Basal Medium 131, 10% fetal bovine serum, and 2 ng/ml basic fibroblast growth factor and analyzed over 3 mo. The human microvascular endothelial cells expressed the endothelial markers von Willebrand factor, CD31, P-selectin, and E-selectin. In addition, the cells showed increased proliferation in the presence of basic fibroblast growth factor (0.5 ng/ml) or vascular endothelial cell growth factor (10 ng/ml). Tumor necrosis factor-α-induced expression of E-selectin was similar in cells at Passages 3, 6, and 12, indicating that the cells maintained responsiveness to cytokines over several weeks. Furthermore, the endothelial cells attained a typical cobblestone morphology with increased cellular density and also formed capillarylike tubes on Matrigel. In summary, the human dermal microvascular endothelial cells display the expected endothelial characteristics when grown for several passages and, therefore, provide a valuable in vitro model for human microvascular endothelium.  相似文献   

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