共查询到18条相似文献，搜索用时 244 毫秒
1.
从本地槐山羊胎儿中,将原始生殖细胞与其生殖嵴周围组织细胞共同分离,经传代培养后获得了具有干细胞特征的山羊胚胎生殖(EG)细胞。结果表明:高糖DMEM培养基和低糖DMEM培养基相比较,低糖DMEM更适宜于山羊EG细胞的分离与克隆;EG细胞在山羊胎儿成纤维细胞饲养层上生长效果较好,可传4代或5代,而在小鼠成纤维细胞饲养层上EG细胞仅传3代;联合添加白血病抑制因子(LIF)、干细胞因子(SCF)和碱性成纤维细胞生长因子(bFGF)能显著提高山羊EG细胞分离与克隆的效率;胎龄为30～45d的胎儿原代培养时可获得大量的细胞集落,克隆培养可传至5代,适合做山羊EG细胞的分离培养。 相似文献
2.
牛胚胎生殖细胞的分离与培养 总被引：6，自引：2，他引：4
以牛胎儿为材料,从原始生殖细胞（PGC）分离培养出胚胎生殖细胞（EG）,并进行传代和鉴定,对影响胚胎生殖细胞分离与培养的因素进行了探讨,研究发现以共培养方式培养牛原始生殖细胞时,原代培养都可以出现大量形态较好的EG细胞集落,说明同源的体细胞可以很好地支持PGC的生长和增殖,组织块培养细胞克隆数目较少,PGC很难增殖,不能形成典型的集落,传代也不理想,只传了一代.同时比较了不同传代方法对牛胚胎生殖细胞细胞传代的影响,发现消化＋机械分离法和消化＋吹打法都可以用于EG细胞的传代.消化＋吹打法操作简单,省时省力,也能够很好的保持细胞的增殖活力.原代培养的牛原代胚胎生殖细胞进行了细胞表面标志抗原SSEA-1,3,4鉴定,呈弱阳性.细胞体外培养可以分化为成纤维样细胞、上皮样细胞和类胚体. 相似文献
3.
以本地白山羊胎儿的生殖嵴为试验材料,从原始生殖细胞(primordial germ cells,PGCs)中分离培养得到胚胎生殖细胞(embryonic germ cells,EGCs),对其进行体外培养和鉴定等。胎儿生殖嵴在室温(25℃)下消化15 min,使用0.125%胰酶+0.02%EDTA比0.25%胰酶+0.04%EDTA效果好,差异显著(P<0.05);挑取集落法和胰酶消化法均能将PGCs传至第2代,两种方法差异不显著(P>0.05);以GEF为饲养层,在培养液中添加不同浓度和种类的细胞因子:①LIF:10 ng/mL;②LIF:20 ng/mL;③LIF(10 ng/mL)+SCF(10 ng/mL);④LIF(20 ng/mL)+SCF(20 ng/mL)。4种情况对于原代集落形成率的影响差异不显著(P>0.05),均能得到传至第2代的EGCs;研究不同胎龄胎儿分离培养PGCs的效果,结果发现4例冠臀长小于15 mm的胎儿仅观察到一个原代集落,6例大于30 mm的胎儿没有观察到原代集落。 相似文献
4.
将本地槐山羊胎儿的原始生殖细胞(PGCs)与其生殖嵴周围组织细胞共同分离,经传代培养后获得了具有干细胞特征的山羊类ES细胞。结果表明高糖DMEM培养基和低糖DMEM培养基相比较,低糖DMEM更适宜于山羊类ES细胞的分离与克隆;类ES细胞在山羊胎儿成纤维细胞饲养层上生长效果较好,可传4代或5代,而在小鼠成纤维细胞饲养层上,类ES细胞仅传3代;联合添加白血病抑制因子(LIF)、干细胞因子(SCF)和碱性成纤维细胞生长因子(bFGF)能显著提高山羊类ES细胞分离与克隆的效率;胎龄为30~45d的胎儿原代培养时可获得大量的细胞集落,克隆培养可传至5代,适合作山羊类ES细胞的分离培养。 相似文献
5.
本试验从绵羊胎儿的生殖嵴中分离出原始生殖细胞,经体外培养后进行了初步鉴定。为建立绵羊原始生殖细胞(primordial germ cells,PGCs)的培养体系,试验对比了不同培养条件对蒙古绵羊PGCs生长的影响,将得到的胚胎生殖细胞(EG细胞)作形态学、酶学和免疫荧光鉴定。结果表明:绵羊EG细胞集落隆起,边缘整齐,呈鸟巢状,细胞排列紧密;AKP染色为弱阳性;免疫荧光检测特异标志物Oct3/4呈弱阳性,SSEA-1、SSEA-3、SSEA-4、TRA-1-61、TRA-1-80呈强阳性。 相似文献
6.
7.
昆明白小鼠胚胎生殖细胞的分离与培养 总被引：3，自引：0，他引：3
以昆明白品系小鼠胎儿生殖嵴为材料，以不同的培养液分离培养胚胎生殖细胞（EG cells），发现小鼠胎儿肝细胞条件培养液的效果好于未添加白血病抑制因子（LIF）的基础培养液，而差于添加了1000IU／mL LIF的基础培养液。同时，试验对比了从不同胎龄胎儿分离培养原始生殖细胞（PGCs）的情况，鉴定了EG细胞的生物学特性；EG细胞经体外培养，可以分化为神经样细胞、上皮样细胞和简单类胚体。 相似文献
8.
山羊PGCs用于分离与克隆类ES细胞 总被引：11，自引：1，他引：10
选择健康成年本地白山羊，自然发情，配种后44d取胎儿，以传统的原始生殖细胞（PGCs)分离与克隆的方法和PGCs与其胎儿生殖嵴周围组织细胞共同培养的方法获得类胚胎干细胞（类ES细胞），并对山羊类ES细胞在不同饲养层上进行培养。结果表明，采用传统方法与共培养的方法并添加细胞因子均能分离获得类ES细胞。分离获得的类ES细胞在同源（山羊）胎儿细胞饲养层上生长效果较好，可传4代或5代，而在小鼠原代成纤维细胞饲养层上类ES细胞仅传3代。另外，共培养不添加细胞因子组仅获1个ES细胞集落，传代后丢失。 相似文献
9.
该研究将20-45d的绒山羊胚胎生殖嵴及其邻近组织用机械剪和胰蛋白酶 EDTA消化处理，未加任何细胞生长因子。仅添加DMEM 10％犊牛血清，在38℃、5％CO2，饱和湿度条件下，将原始生殖细胞(PGCs)与其胎儿成纤维细胞共培养，在原代培养至1周左右时观察到了鸟巢状类胚胎干细胞(ES细胞)和集落团，贴壁生长于成纤维细胞层上面。经电镜观察，类胚胎干细胞体积小、核大，有多个核仁。细胞形态不规则，无明显界限等特点。 相似文献
10.
山羊胚胎生殖细胞是一种来源于胎儿原始性腺的多能干细胞,建立该细胞体外稳定分离培养体系对研究山羊繁殖育种具有重要价值。本试验通过酶消化法和组织培养法分离培养关中奶山羊胚胎生殖细胞,检测无血清培养基对细胞体外增殖的影响。结果发现,该培养基可以分离得到山羊胚胎生殖细胞,细胞集落形态典型,表达AKP、Oct4、TERT及SSEA-1。经体外分化试验表明,细胞可以分化为类胚体、成纤维样细胞、成脂细胞和卵母细胞样形态。无血清培养基可以用于山羊胚胎生殖细胞的分离与培养,本试验对进一步建立山羊胚胎生殖细胞长期培养体系提供了新的参考。 相似文献
11.
Isolation and culture of rabbit primordial germ cells 总被引：2，自引：0，他引：2
Kakegawa R Teramura T Takehara T Anzai M Mitani T Matsumoto K Saeki K Sagawa N Fukuda K Hosoi Y 《The Journal of reproduction and development》2008,54(5):352-357
Primordial germ cells (PGCs) are embryonic precursors of the gametes of adult animals and are considered stem cells of the germline. Since their proliferation in vitro correlates well with the schedule of developmental changes in vivo, they might be interesting research tools for genomic imprinting, germ-cell tumors and fertility. Furthermore, once primordial germ cells are separated and placed on a feeder layer with cytokines, they become cultured pluripotent cell lines called embryonic germ (EG) cells. EG cells share several important characteristics with embryonic stem (ES) cells as they can also contribute to the germ line of chimeras. To investigate the characteristics of PGCs and establish rabbit EG (rEG) cells, we cultured rabbit PGCs (rPGCs) in vitro with various combinations of leukemia inhibitory factor (LIF), basic fibroblast growth factor (bFGF) and forskolin on inactivated mouse embryonic fibroblast (MEF) feeder layers. The present study found PGC proliferation in early cultures and induction of rEG-like colonies. These cells expressed pluripotent markers, such as alkaline phosphatase activity, OCT-4, Sox-2 and SSEA-1, in the undifferentiated state; however, the cells did not develop into a teratoma when injected into the kidney capsules of SCID mice, although the restricted differentiation potentials to neural cells were determined via embryoid body formation. From these characteristics and further characterization of the germ stem cell markers Vasa, SCP-1 and SCP-3, we suggested that these were hybrid cells with characteristics somewhere between PGC and EG cells. 相似文献
12.
Pluripotent stem cells, such as embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) are able to differentiate into all cell lineages of the embryo proper, including germ cells. This pluripotent property has a huge impact on the fields of regenerative medicine, developmental biology and reproductive engineering. Establishing the germ cell lineage from ESCs/iPSCs is the key biological subject, since it would contribute not only to dissection of the biological processes of germ cell development but also to production of unlimited numbers of functional gametes in vitro. Toward this goal, we recently established a culture system that induces functional mouse primordial germ cells (PGCs), precursors of all germ cells, from mouse ESCs/iPSCs. The successful in vitro production of PGCs arose from the study of pluripotent cell state, the signals inducing PGCs and the technology of transplantation. However, there are many obstacles to be overcome for the robust generation of mature gametes or for application of the culture system to other species, including humans and livestock. In this review, we discuss the requirements for a culture system to generate the germ cell lineage from ESCs/iPSCs. 相似文献
13.
Attempt to produce nuclear transferred primordial germ cells using electrofusion in domestic chicken
As a step to develop a somatic nuclear transfer technique for avian species, an attempt to produce somatic nuclear transferred primordial germ cells (PGC) in the domestic chicken was carried out. Primordial germ cells and embryonic blood cells (EBC) were collected from 2‐day‐old embryos and the nuclei were transferred from EBC into PGC by electrofusion. The most efficient pearl chain was developed when a 350‐V/cm AC field was applied for 60 s. Cell fusion between PGC and EBC was most effective when 4‐kV/cm DC pulses, 60 µs pulse width, were applied three times to a cell suspension dispersed in 0.2 or 0.25 mol/L saccharose solution. The present results provide basic information for the production of somatic cell nuclear transferred chickens using PGC as the nuclear recipient. 相似文献
14.
Primordial germ cells (PGCs) from day 27 porcine fetuses have often been isolated to establish pluripotent embryonic germ (EG) cell lines, but little is known regarding their imprinted gene status. In our study, we attempted to detect the imprinted gene expression of cloned embryos and EG cells derived from individual PGC of day 27 and day 35, using single nucleotide polymorphism (SNP) analysis of the paternally expression gene 10 (PEG10) as a sign of parental‐origin‐specific expression. The results showed biallelic gene expression of the SNP that occurred in EG cell colonies and almost all of the cloned blastocysts, demonstrating that aberrant imprinted gene expression of PEG10 occurs in the day 27 porcine PGCs, whereas monoallelic expression of the PEG10 gene occurs in all the PGC clones derived from day 35 PGCs. In addition, the same imprinted gene status was observed for blastocysts derived from both male and female PGCs, indicating that the parental genomic imprinting is erased in male and female germlines. 相似文献
15.
分别对取自50~95日龄水牛胎儿的原生殖细胞和前精原细胞进行体外培养,观察其生物学行为,并检测其碱性磷酸酶(AP)活性和Oct-4蛋白特性,探讨利用这些生殖细胞建立干细胞系的可行性和检测方法。结果表明水牛原生殖细胞及前精原细胞分别在体外培养时,均能形成细胞克隆;克隆与周围细胞分界明显,但克隆中细胞相互间界限不清;部分克隆有分隔现象,形如多个克隆共同组成一个大克隆;细胞克隆均至少能培养4代以上;原生殖细胞和前精原细胞及其来源的细胞克隆均呈AP阴性和Oct-4蛋白阴性,其中部分克隆表现为AP假阳性。研究结果显示水牛原生殖细胞和前精原细胞均可用于建立干细胞系;体外培养时,AP活性和Oct-4蛋白不适宜用来检测这些细胞及其来源的细胞克隆。 相似文献
16.
本试验研究了遗传背景和胎儿日龄对猪类胚胎生殖细胞(embryonic germ cells,EG)培养的影响,分别利用五指山猪(WZSP)和微型白猪胎儿为试验材料,比较了2种猪胎儿在EG培养方面的异同。试验结果表明,在相同条件下,2种猪均得到了可以传代的EG细胞集落,得到的EG集落AP染色呈阳性,体外培养能形成类胚体,类胚体继续培养能分化成多种细胞。试验比较了5个指标:平均第1次出现EG集落时间(T1)、第1次出现大批EG集落时间(T2)、第1次传代时间(T3)、平均传代间隔(T4)及传代情况(P),结果显示,WZSP和微型白猪2个品系差异不显著(P>0.05),表明WZSP和微型白猪都可以用来作为猪EG细胞建系的材料;分别采集第26、27、28天胎儿比较日龄对EG培养的影响。试验测量了不同日龄胎儿中肾大小,比较以上5个指标,观察胎儿日龄对建立猪EG细胞系方面的影响,结果表明第26、27、28天胎儿在EG培养方面差异不显著(P>0.05)。 相似文献
17.
体外培养山羊50~68日龄雄性胎儿生殖细胞,并检测它们的碱性磷酸酶(AP)活性和Oct-4蛋白,探讨性别分化后的生殖细胞用于建立干细胞系的可行性及检测指标。当山羊胎儿睾丸细胞体外培养时,生殖细胞及其来源的细胞克隆均呈AP阴性和Oct-4蛋白阴性,其中有部分细胞克隆表现为AP假阳性。山羊胎儿生殖细胞克隆呈隆突状生长,多为圆形,与周围细胞界限分明,但克隆内细胞间界限不清。细胞克隆至少可以培养3代以上。研究结果显示,山羊雄性胎儿生殖细胞可以用于建立生殖系来源的干细胞系;AP和Oct-4蛋白不适宜用来检测体外培养的山羊胎儿生殖细胞及其来源的细胞系。 相似文献
18.
R J Hidalgo E W Jones J E Brown A J Ainsworth 《American journal of veterinary research》1989,50(12):2028-2032
Anaplasma marginale was propagated in a tick cell line derived from Dermacentor variabilis embryos. The rickettsial organism was identified and monitored in culture by transmission electron microscopy and the indirect immunofluorescence technique, using specific monoclonal antibodies. Inoculation of the embryonic tick cell line with midguts of infected adult ticks (culture 1), nymphal ticks (culture 2) and adult ticks that were infected as nymphs and dissected as adults (culture 3) resulted in 3 continuous cultures of A marginale. Culture 1 had been maintained through 22 passages over a 11-month period; cultures 2 and 3 had been maintained for 18 passages over a 9-month period. Growth of A marginale in the cell line began in the area of the nuclear membrane at approximately 4 days after inoculation or transfer. Thereafter, the organisms were observed in inclusions scattered throughout the cytoplasm of the host cells. Maximal growth of the organism occurred at 7 to 14 days, after which numbers of inclusions rapidly decreased to minimal or undetectable levels. The organism began new cycles of growth with each 1:5 to 1:10 split and transfer of the host cells. Electron microscopy of recently infected cells revealed a morphology of the organism that closely resembled that observed in marginal bodies of infected erythrocytes. After several passages, A marginale organisms had a varied morphology and resembled the organism described in midgut cells of naturally infected ticks.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献