共查询到19条相似文献，搜索用时 234 毫秒
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动物体细胞克隆技术的研究进展 总被引：1，自引：0，他引：1
体细胞克隆绵羊“多莉”（Dolly）的诞生，表明成年哺乳动物体细胞具有基因组的全能性。本文从“多莉”诞生的背景、体细胞克隆技术的研究现状、体细胞核移植过程中的核质互作、该技术目前存在的问题及其在制作转基因动物上的应用等方面，概述了体细胞克隆技术的研究进展。 相似文献
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哺乳动物体细胞克隆技术是近年来发展起来的高新技术，体细胞克隆绵羊——多利的诞生已引起了世界的轰动，笔者就关于马的体细胞克隆技术、重组卵母细胞的体外构建、激活、培养和应用前景等作一综述。 相似文献
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哺乳动物体细胞克隆技术研究进展 总被引：1，自引：0，他引：1
吴清明 《河南畜牧兽医(综合版)》2001,22(12)
哺乳动物体细胞克隆技术又称哺乳动物体细胞核移植技术或无性繁殖技术，它是通过特殊的人工手段（显微操作、电融合等），对哺乳动物特定发育阶段的核供体（体细胞核）及相应的核受体（去核的原核胚或成熟的卵母细胞），不经过有性繁殖过程，进行体外重构，并通过重构胚的胚胎移植，从而达到扩繁同基因型哺乳动物种群的目的。目前，用核移植技术已生产出了几种体细胞克隆哺乳动物。体细胞动物在畜牧业实际生产中，哺乳动物体细胞克隆技术的成功使快速、大量生产优良种畜成为可能。在医学上，体细胞克隆技术为生产成年个体的胚胎干细胞、复制… 相似文献
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哺乳动物克隆技术及其研究进展 总被引：1，自引：0，他引：1
综述了哺乳动物克隆技术的现状和发展趋势。介绍了哺乳动物胚胎细胞克隆、体细胞克隆技术和转基因动物克隆技术的研究进展以及我国哺乳动物克隆技术发展情况。 相似文献
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体细胞克隆绵羊“多莉”(Dolly)的诞生,表明成年哺乳动物体细胞具有基因组的全能性。本文从“多莉”诞生的背景、体细胞克隆技术的研究现状、体细胞核移植过程中的核质互作、该技术目前存在的问题及其在制作转基因动物上的应用等方面,概述了体细胞克隆技术的研究进展。 相似文献
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哺乳动物克隆技术的研究进展 总被引：1，自引：0，他引：1
本文针对近年来的哺乳动物克隆技术的研究热点,分别从体细胞克隆方法,克隆动物的细胞核重编程,异种克隆及治疗性克隆等方面进行了分析,最后就克隆技术在转基因中的应用进行了总结。 相似文献
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MJ Kim HJ Oh GA Kim JE Park EJ Park G Jang JC Ra SK Kang BC Lee 《Reproduction in domestic animals = Zuchthygiene》2012,47(Z4):115-119
The aim of this article is to review dog cloning research and to suggest its applications based on a discussion about the normality of cloned dogs. Somatic cell nuclear transfer was successfully used for production of viable cloned puppies despite limited understanding of in vitro dog embryo production. Cloned dogs have similar growth characteristics to those born from natural fertilization, with no evidence of serious adverse effects. The offspring of cloned dogs also have similar growth performance and health to those of naturally bred puppies. Therefore, cloning in domestic dogs can be applied as an assisted reproductive technique to conserve endangered species, to treat sterile canids or aged dogs, to improve reproductive performance of valuable individuals and to generate disease model animals. 相似文献
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Successful mouse cloning of an outbred strain by trichostatin A treatment after somatic nuclear transfer 总被引：8，自引：0，他引：8
Kishigami S Bui HT Wakayama S Tokunaga K Van Thuan N Hikichi T Mizutani E Ohta H Suetsugu R Sata T Wakayama T 《The Journal of reproduction and development》2007,53(1):165-170
Although the somatic cloning technique has been used for numerous applications and basic research of reprogramming in various species, extremely low success rates have plagued this technique for a decade. Further in mice, the "clonable" strains have been limited to mainly hybrid F1 strains such as B6D2F1. Recently, we established a new efficient cloning technique using trichostatin A (TSA) which leads to a 2-5 fold increase in success rates for mouse cloning of B6D2F1 cumulus cells. To further test the validity of this TSA cloning technique, we tried to clone the adult ICR mouse, an outbred strain, which has never been directly cloned before. Only when TSA was used did we obtain both male and female cloned mice from cumulus and fibroblast cells of adult ICR mice with 4-5% success rates, which is comparable to 5-7% of B6D2F1. Thus, the TSA treatment is the first cloning technique to allow us to successfully clone outbred mice, demonstrating that this technique not only improves the success rates of cloning from hybrid strains, but also enables mouse cloning from normally "unclonable" strains. 相似文献
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Wakayama T 《The Journal of reproduction and development》2007,53(1):13-26
Although it has now been 10 years since the first cloned mammals were generated from somatic cells using nuclear transfer (NT), most cloned embryos usually undergo developmental arrest prior to or soon after implantation, and the success rate for producing live offspring by cloning remains below 5%. The low success rate is believed to be associated with epigenetic errors, including abnormal DNA hypermethylation, but the mechanism of "reprogramming" is unclear. We have been able to develop a stable NT method in the mouse in which donor nuclei are directly injected into the oocyte using a piezo-actuated micromanipulator. Especially in the mouse, only a few laboratories can make clones from adult somatic cells, and cloned mice are never successfully produced from most mouse strains. However, this technique promises to be an important tool for future research in basic biology. For example, NT can be used to generate embryonic stem (NT-ES) cell lines from a patient's own somatic cells. We have shown that NT-ES cells are equivalent to ES cells derived from fertilized embryos and that they can be generated relatively easily from a variety of mouse genotypes and cell types of both sexes, even though it may be more difficult to generate clones directly. In general, NT-ES cell techniques are expected to be applied to regenerative medicine; however, this technique can also be applied to the preservation of genetic resources of mouse strain instead of embryos, oocytes and spermatozoa. This review describes how to improve cloning efficiency and NT-ES cell establishment and further applications. 相似文献
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综述了获取基因全长cDNA序列的方法,即全长cDNA文库的构建、cDNA末端快速扩增和电子克隆;重点介绍了Oligo-capping、CAPture、Cap-trapper及SMART构建全长cDNA文库的方法,并阐述了其在兽药研究中的应用. 相似文献
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Smith LC Bordignon V Babkine M Fecteau G Keefer C 《The Canadian veterinary journal. La revue veterinaire canadienne》2000,41(12):919-924
Animal cloning is becoming a useful technique for producing transgenic farm animals and is likely to be used to produce clones from valuable adults. Other applications will also undoubtedly be discovered in the near future, such as for preserving endangered breeds and species. Although cloning promises great advantages for commerce and research alike, its outcome is not always certain due to high pregnancy losses and high morbidity and mortality during the neonatal period. Research into the mechanisms involved in the reprogramming of the nucleus is being conducted throughout the world in an attempt to better understand the molecular and cellular mechanisms involved in correcting these problems. Although the cause of these anomalies remains mostly unknown, similar phenotypes have been observed in calves derived through in vitro fertilization, suggesting that culture conditions are involved in these phenomena. In the meantime, veterinarians and theriogenologists have an important role to play in improving the efficiency of cloning by finding treatments to assure normal gestation to term and to develop preventative and curative care for cloned neonates. 相似文献
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Bovine somatic cell nuclear transfer (SCNT) is a sophisticated technique system,including oocyte maturation,donor cell preparation and oocytes microscopic operation,fusion,activation and culture.Although the birth of cloning cattle has been reported recently,the efficiency of somatic cell cloning has remained lowly.In order to establish the optimization somatic cell nuclear transfer system of Yanbian Yellow cattle,this review summarized only from 6 main aspects mentioned above in this field. 相似文献
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胚胎干细胞(embryonic stem cell．ES细胞)是从早期胚胎内细胞团(inner cell mass．ICM)或原始生殖细胞(primordial germ cells．PGGs)分离和克隆的具有全能性的细胞。ES细胞作为一种新型的实验材料,广泛应用于动物克隆、转因动物的生产、真核细胞基因的表达与调控、人类遗传病动物模型的创建,人类器官移植材料的生产以及细胞分化机制的研究等领域。ES细胞分离、克隆技术与遗传工程和胚胎工程相结合,对于阐明动物生长发育的基本规律、抢救和保护濒危动物遗传资源、建立先进的动物育种技术体系具有重大的理论意义和实践价值。本文将结合胚胎干细胞的生物学特性,综述其在动物遗传育种中的应用及在当前技术水平下存在的问题。 相似文献