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1.
乳鼠心肌膜微血管内皮细胞的体外培养   总被引:2,自引:0,他引:2  
目的 改进心肌膜微血管内皮细胞的体外培养方法,为进一步研究其结构和功能提供实验数据.方法 选取10~15d龄的SD大鼠,采用植块法培养原代心肌膜微血管内皮细胞,在继代培养中通过差速消化和差速贴壁方法、结合倒置显微镜下形态学的观察进行继代培养和纯化,利用免疫细胞化学方法检测第Ⅷ因子相关抗原对培养细胞进行了鉴定.结果 成功培养了大鼠心肌膜微血管内皮细胞,细胞呈多边形或鹅卵石状;免疫细胞化学染色第Ⅷ因子相关抗原显阳性.结论 改良了心肌膜微血管内皮细胞的体外培养方法,获得了较高纯度的心肌膜微血管内皮细胞,可用于进一步的科学研究.  相似文献   

2.
背景:建立高纯度的人胎盘微血管内皮细胞体外培养体系对研究胎盘功能是十分必要的。目前,国内外研究多采用三步酶消化法结合免疫磁珠法分离胎盘微血管内皮细胞,然而步骤过于繁琐且对细胞损伤较大。因而,如何简化人胎盘微血管内皮细胞分离步骤,同时又能提高目标细胞纯度的体外培养方法成为研究热点。目的:探索一种简便高效的从早期绒毛组织中分离人胎盘微血管内皮细胞的体外培养方法,观察细胞生长状态并进行鉴定。方法:利用健康孕6-8周孕妇行人工流产后的绒毛组织,经两步酶消化法和非连续Percoll密度梯度离心得到人胎盘微血管内皮细胞,传代时利用胰酶消化法和反复贴壁法对细胞进行纯化。结果与结论:实验成功获取人胎盘微血管内皮细胞,原代培养的人胎盘微血管内皮细胞在培养24 h后基本完全贴壁,第10天进入对数生长期,第12至13天细胞浓度达80%,传代细胞较原代细胞生长活跃,培养5-7 d可长满培养瓶底,呈"铺路石样"排布。免疫荧光化学结果显示,培养的细胞中FⅧ因子与CD31相关抗原双荧光染色呈阳性,细胞阳性率达100%。MTT法测得培养第5代人胎盘微血管内皮细胞的生长曲线呈倒"S"形。结果证实,应用两步酶消化法、非连续Percoll密度梯度离心法分离细胞,并利用胰酶消化法和反复贴壁法纯化细胞,可获得大量高纯度的人胎盘微血管内皮细胞。  相似文献   

3.
目的 体外原代培养大鼠心肌微血管内皮细胞(MMVECs),并观察其生长特性。方法采用酶蛋白消化法培养大鼠MMVECs,用差速贴壁法和亚细胞克隆法纯化细胞,用第Ⅷ因子相关抗原和CD31相关抗原鉴定细胞,倒置相差显微镜下观察细胞生长状态。结果 成功培养出纯度很高的MMVECs,可用于MMVECs相关实验研究。结论 此原代培养MMVECs的方案具有较好的可操作性和可重复性。  相似文献   

4.
背景:肺组织的功能依赖于肺微血管内皮细胞的活性,因此肺微血管内皮细胞是相关研究的重要细胞模型,但目前国内多采用的组织块贴壁法培养所得的肺微血管内皮细胞常有其他细胞混杂。目的:建立一种有效分离、培养、扩增小鼠肺微血管内皮细胞的方法。方法:采用酶消化、免疫磁珠二次分选法分离纯化小鼠肺微血管内皮细胞,贴壁培养法体外扩增,CCK-8法测定细胞的生长情况,相差显微镜观察培养细胞的形态,透射电子显微镜观察细胞的超微结构,流式细胞仪对其表型进行鉴定。结果与结论:培养所得小鼠肺微血管内皮细胞具有典型的铺路石样形态学特征,含有大量内皮细胞特有的杆状细胞器Weibel-Palade小体,较稳定地表达内皮细胞特异性表面标记CD105,不表达淋巴管内皮细胞特异性表面标记血管内皮生长因子受体3。说明免疫磁珠二次分选法可成功分离纯化小鼠肺微血管内皮细胞,体外培养所获细胞纯度高、自我更新能力强,并保留了包括构成、表面抗原表达等特性。  相似文献   

5.
大鼠脑微血管内皮细胞的培养   总被引:1,自引:0,他引:1  
白慧云  穆祥  丁库克  李莉  郭洋  董小黎 《微循环学杂志》2011,21(1):3-5,80,83,77
目的:探索一种简便易行、可培养出高纯度大鼠脑微血管内皮细胞的方法。方法:1月龄SD大鼠,解剖得到大脑皮质,密度离心法获得较纯的脑微血管段后进行原代培养,传代采用差速消化和贴壁方法进行纯化。通过形态学观察及第Ⅷ因子相关抗原免疫荧光检测对培养细胞进行鉴定。结果:密度离心法分离出的大量微血管段呈"串珠样"结构,培养24h可见短梭形、多角形细胞,8~10天基本融合。第2代细胞经免疫荧光染色,第Ⅷ因子相关抗原呈阳性,阳性率达90%。结论:原代细胞采用低分子量葡聚糖加Percoll密度离心法、传代细胞采用差速消化和差速贴壁法纯化可成功培养高纯度的脑微血管内皮细胞。  相似文献   

6.
目的:探讨绿原酸对治疗大肠杆菌内毒素性疾病的作用机制.方法:利用体外培养大鼠肠黏膜微血管内皮细胞,研究金银花主要成分绿原酸对正常肠黏膜微血管内皮细胞作用1、3、6、9h后的NO和ET-1分泌量的影响,以及对经大肠杆菌内毒素作用1h后肠黏膜微血管内皮细胞于3、6、9h后的NO和ET-1分泌量的影响.结果:绿原酸有效地抑制了肠黏膜微血管内皮细胞分泌的ET-1和NO的比值升高.结论:绿原酸对内毒素作用下的肠黏膜微血管内皮细胞的功能有保护作用.  相似文献   

7.
绿原酸对肠黏膜微血管内皮细胞分泌NO和ET-1的影晦   总被引:2,自引:0,他引:2  
目的:探讨绿原酸对治疗大肠杆菌内毒素性疾病的作用机制。方法:利用体外培养大鼠肠黏膜微血管内皮细胞,研究金银花主要成分绿原酸对正常肠黏膜微血管内皮细胞作用1、3、6、9h后的NO和ET-1分泌量的影响,以及对经大肠杆菌内毒素作用1h后肠黏膜微血管内皮细胞于3、6、9h后的NO和ET-1分泌量的影响。结果:绿原酸有效地抑制了肠黏膜微血管内皮细胞分泌的ET-1和NO的比值升高。结论:绿原酸对内毒素作用下的肠黏膜微血管内皮细胞的功能有保护作用。  相似文献   

8.
大鼠胰岛微血管内皮细胞分离、纯化与培养的改进   总被引:1,自引:1,他引:1  
目的:建立稳定可靠的大鼠胰岛微血管内皮细胞分离培养方法。方法:分离纯化大鼠胰岛后进行内皮细胞选择性培养,使用UEA-1包被的免疫磁珠对胰岛微血管内皮细胞进行纯化。免疫荧光法检测经典的内皮细胞标志物第Ⅷ因子相关抗原(vWF)和CD34的表达和吞噬Dil标记的乙酰化低密度脂蛋白(Dil-Ac-LDL)能力。结果:胰岛培养4-5 d后,可见内皮细胞从贴壁的胰岛内爬出,通过UEA-1包被的免疫磁珠筛选出胰岛微血管内皮细胞接种后24 h细胞开始贴壁。该细胞具有单层生长、接触抑制的特性。大鼠胰岛微血管内皮细胞表达vWF和CD34,可摄取Dil-Ac-LDL。结论:本研究方法是一种较为高效的分离、纯化和培养大鼠胰岛微血管内皮细胞的方法。  相似文献   

9.
目的分离、培养原代脑微血管内皮细胞,建立体外血脑屏障模型。同时探索高纯度、活性好的脑微血管内皮细胞的分离培养方法。方法取3周大鼠大脑,分离皮质,经过匀浆、葡聚糖离心以及消化后,取纯度较高的脑微血管段种植于胶原蛋白包被过的塑料培养瓶中进行培养。显微镜观察及检测Ⅷ因子相关抗原。结果镜下细胞呈长梭形。7d左右细胞可融合,Ⅷ因子相关抗原免疫组化检测为阳性.且阳性细胞占绝大部分。结论本实验成功分离大鼠脑微血管内皮细胞,并进行原代培养,为脑微血管内皮细胞的进一步研究提供了模型.也为构建更高级的大鼠体外血脑屏障奠定基础。  相似文献   

10.
牛脉络膜微血管内皮细胞的分离培养和鉴定   总被引:2,自引:0,他引:2  
詹永乐  李维业 《解剖学报》1997,28(3):297-300
为了在体外研究脉络膜微血管内皮细胞,采用胰蛋白酶和胶原酶二次消化法成功地从牛眼球中分离培养了脉络膜微血管内皮细胞。接种后48h已出现岛状细胞团;96h细胞团增大,可区分出细胞密度较大的中央区及细胞密度较小的边缘区;144h细胞开始汇合成单细胞层;168h细胞已汇合成单细胞层。通过形态学特征、第Ⅷ因子相关抗原和乙酰化低密度脂蛋白受体检测证实是内皮细胞。该细胞体外培养方法的建立为体外研究脉络膜微血管内  相似文献   

11.
Over 200 schizophrenic patients belonging to three major and interrelated pedigree complexes have been investigated over the past 30 years in a North Swedish geographically isolated population, presently numbering about 6,000. An intensive investigation of a number of biochemical correlates and genetic markers in a few selected families belonging to one of the major pedigrees has indicated new strategies for the current research program.
Schizophrenia, as defined operationally, is significantly associated with decreased activities of two enzymes (1) blood platelet monoamine oxidase, (2) plasma dopamine-β-hydroxylase, and (3) with the genetic marker Gc2 (group specific antigen). Both enzymes are subject to genetic variation. A positive score for linkage between schizophrenia and low plasma DBH activity has been calculated, but, so far, available data are insufficient for discrimination between linkage and partial contribution of genetically controlled low plasma DBH to the pathogenesis of the disease. Alternatively, both mechanisms could be involved.
As a model for continued research, schizophrenia is explained as based on a double dominant-recessive genotype (Aabb), representing a vulnerability which in about 50 % of cases develops into clinical schizophrenia. It is suggested that the dominant mutation (A) operates on or affects MAO activity, and that the recessive genotype (bb) is instrumental in low variates of DBH activity and very likely such variates within the normal range of physiological variation. Moreover, it is suggested that the combined effects of MAO- and DBH-reduced efficiency on the metabolism of e.g. dopamine could be an essential pathogenic mechanism for the schizophrenic illness which is segregating in this population.  相似文献   

12.
Renal dysplasia and asplenia in two sibs   总被引:2,自引:0,他引:2  
A family is reported in which two sibs, one male and the other female, both died within 24 hours of birth with enlarged polycystic kidneys. Postmortem histology in the second child showed gross renal dysplasia. In both children the pancreas was enlarged, nodular and cystic but the liver appeared macroscopically normal. In the second child, histological examination confirmed pancreatic fibrosis with cystic dilation of ducts, but showed portal fibrosis with bile duct proliferation in the liver.
This combination of findings is very reminiscent of those in a girl and her brother reported by Ivemark et al. (1959). The children reported here also showed absence or hypoplasia of the spleen, cardiac anomalies and other features of the Ivemark syndrome (Ivemark 1955), a quite different, usually sporadic, congenital disorder. It is suggested that the children described here have a distinct lethal congenital disorder, probably inherited in an autosomal recessive manner.  相似文献   

13.
About 1900, modern food selection and processing caused widespread epidemics of the B vitamin deficiency diseases of beriberi and pellagra which, for genetic reasons, often expressed as different diseases ranging from bowel and heart disease to dermatoses and psychoses. But the B vitamins merely help convert essential fatty acids (EFA) into the prostaglandin (PG) tissue regulators and it now turns out that, through hydrogenation, milling and selection of w3-poor southern foods, we have also been systematically depleting, by as much as 90%, a newly discovered trace Nordic EFA (w3) of special importance to primates and sole precursor of the PG3(4) series, even as a concurrent fiber deficiency increases body demand for EFA. Since substrate EFA is processed by many B vitamin catalysts, an EFA deficiency will mimic a panhypovitaminosis B, i.e., a mixture of substrate beriberi and substrate pellagra resembling vitamin beriberi and pellagra but exhibiting as even more diverse endemic disease. This would consitute a second stage of the Modern Malnutrition and explain why some workers now hold the dominant diseases of modermized societies to be new, nutritionally based, pellagraform yet lipid-related and to range, once again, from heart disease to psychosis. It is an assumption that our dominant diseases are unrelated to each other or are merely revealed by our diagnostic acumen and therapeutic success; and that hydrogenating millions of tons of food oils annually, to destroy the rancidity producing w3-EFA, is safe for primates. Extensive beriberiform disease is reported here in 32 typical cases taken from medical practice which responds strikingly to linseed oil supplements (60% w3-EFA) in confirmation of identical results in Capuchins.  相似文献   

14.
15.
Newton H 《Medical history》2011,55(2):153-182
Sick children were ubiquitous in early modern England, and yet they have received very little attention from historians. Taking the elusive perspective of the child, this article explores the physical, emotional, and spiritual experience of illness in England between approximately 1580 and 1720. What was it like being ill and suffering pain? How did the young respond emotionally to the anticipation of death? It is argued that children’s experiences were characterised by profound ambivalence: illness could be terrifying and distressing, but also a source of emotional and spiritual fulfilment and joy. This interpretation challenges the common assumption amongst medical historians that the experiences of early modern patients were utterly miserable. It also sheds light on children’s emotional feelings for their parents, a subject often overlooked in the historiography of childhood. The primary sources used in this article include diaries, autobiographies, letters, the biographies of pious children, printed possession cases, doctors’ casebooks, and theological treatises concerning the afterlife.  相似文献   

16.
Recent advancements in agricultural biotechnology have created a need for analytical techniques to determine introduced proteins in crops enhanced through modern biotechnology techniques. These proteins are expressed in plant tissues and may be present in food ingredients. Immunoassays are ideally suited for protein detection and may be used as both quantitative and threshold methods. Microplate ELISA and lateral flow devices are two of the most commonly used immunoassay formats for agricultural biotechnology applications. This paper provides general background information and a discussion of criteria for the validation and application of immunochemical methods to the analysis of proteins introduced into plants and food ingredients using biotechnology methods. It is the result of a collaborative effort of members of the Analytical Environmental Immunochemical Consortium. This collaborative effort represents the combined expertise of several organizations to reach consensus on establishing guidelines for the validation and use of immunoassays. Further, the paper offers developers and users a consistent approach to adopting the technology as well as aid in producing accurate and meaningful results.  相似文献   

17.
The preparation steps usually necessary for obtaining ultrathin frozen sections of biological material (chemical prefixation, enclosing, cryoprotective treatment, freezing, sectioning, and post-staining the sections for transmission electron microscopy) are submitted to a critical analysis. The application of cryo-ultramicrotomy, in particularly for cytochemical purposes, is reviewed. Fundamental considerations of chemical prefixation and poststaining are supported by examples from yeast cytology. Furthermore, the efficiency of the cryo-ultramicrotomy (electron optical resolution of ultrastructural details) is demonstrated on yeast cells and protoplasts.  相似文献   

18.
HLA-A,-B,-C,-DRB1 and -DQB1 alleles have been studied in Chimila Amerindians from Sabana de San Angel (North Colombian Coast) by using high resolution molecular typing. A frequent extended haplotype was found:HLA-A*24:02-B*51:10-C*15:02-BRB1*04:07-DQB1*03:02 (28.7%) which has also been described in Amerinndian Mayos Mexican population (Mexico, California Gulf, Pacific Ocean). Other haplotypes had already been found in Amerindians from Mexico (Pacific and Atlantic Coast), Peru (highlands and Amazon Basin), Bolivia and North USA. A geographic pattern according to HLA allele or haplotype frequencies is lacking in Amerindians, as already known. Also, five new extended haplotypes were found in Chimila Amerindians. Their HLA-A*24:02 high frequencies characteristic is shared with aboriginal populations of Taiwan; also, HLA-C*01:02 high frequencies are found in New Zealand Maoris, New Caledonians and Kimberly Aborigines from Australia. Finally, this study may show a model of evolutionary factors acting and rising one HLA allele frequency (-A*24:02), but not in others that belong to the same or different HLA loci.  相似文献   

19.
Starting with the integument, we see many organs are contractile sacs or multiples thereof, which tubes or bags constitute the major part of the entire body. Recognition of this basic unit and its characteristics sheds new light, individually and collectively, on many disorders previously considered unrelated. Muscular tears and perforations develop in the walls of these chambers, being no way peculiar to those organs, wherein, hydrochloric acid occurs. So, it is not necessary to explain the absence of excessive acid from patients who exhibit holes in the gastric, uterine, aortic, duodenal, rectal, pulmonary, retina, and other walls. Muscle, not acid is the great common factor relating idiopathic disorders in the gastrointestinal tract to each other and to similar diseases in other systems. When the units are linked together, the lesions tend to appear as arthropathies, i.e. at the joints. Rephrasing common-place observations, frees us from conventional, conceptual cul-de-sacs. An observation is only as good as its interpretation, so all possibilities must be considered, otherwise, we will remain blinded by our misconceptions.  相似文献   

20.
Zusammenfassung Der Einfluß von verschiedenen Nahrungsmitteln auf Methoden zur Bestimmung von Adrenalin (AD), Noradrenalin (NA), Vanillinmandelsäure (VMS), Metanephrinen (MN), Homovanillinsäure (HVS) und 5-Hydroxyindolessigsäure (5-HIE) im 24 h-Harn zur Diagnose des Phäochromozytoms bzw. Karzinoid-Syndroms wurde untersucht. Die in die Untersuchung einbezogenen Nahrungsmittel waren: Tee, Kaffee, Mandeln, Ananas, Käse, Walnüsse, Vanillepudding, Bananen, Tomaten und Milchschokolade. Außerdem wurde der Einfluß des Zigarettenrauchens auf die Bestimmung von AD, NA, VMS und MN untersucht.Walnüsse führten zu einer starken Erhöhung der 5-HIE-Ausscheidung. Bananen erhöhten die Ausscheidung von AD, NA, VMS, MN und 5-HIE. Kaffee und Ananas bewirkten eine geringe Zunahme der MN-Werte. Rauchen von 20–30 Zigaretten/Tag beeinflußte keine der vier Variablen.Wenn die beschriebenen Methoden benutzt werden, sollte lediglich auf den Verzehr von Bananen und Walnüssen vor und während der Harnsammelperioden verzichtet werden, da die oberen Normgrenzen im Harn überschritten werden könnten. Ein Verzicht auf Kaffee und Ananas in normalen Mengen ist nicht erforderlich. Es besteht kein Anlaß, weiterhin die bisherigen umfangreichen Restriktionen der übrigen Nahrungsmittel beizubehalten.  相似文献   

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