首个牛胚胎干细胞诞生

经过几十年的努力,科学家最终成功地从牛身上获得胚胎干(ES)细胞,并在培养皿中使其保持原始状态。获得这些可变成从皮肤到肌肉、骨头等各种组织的多功能细胞,将使调整和保存肉牛以及乳牛品种的遗传性状变得更加容易。这反过来又促成了产生更多牛奶或者更嫩牛肉、产仔时面临更少并发症以及拥有更强的疾病抵抗力的动物。此项发现或许还为研究牛的基本发育和成为人类疾病模型开辟了道路。 “我原以为这辈子都不会看到此事发生。”美国密歇根州立大学发育生物学家Jose Cibelli表示。他是上世纪90年代末试图获得牛ES细胞的团队成员之一。自从以后的诸多努力中,当来自牛胚胎的干细胞在实验室中被生长出来时,它们会发育成其他细胞类型。这意味着它们很快丧失了多能性。 1981年,科学家成功分离出小鼠ES细胞,从而使他们得以研究早期胚胎发育并且测试遗传缺陷的影响。此后不久,研究人员将目光转向了牛。不过,直到1998年,研究人员才找到合适的营养基培养人类ES细......阅读全文

多能干细胞(ES/iPS)冻存和复苏方法

多能干细胞(ES/iPS)冻存是干细胞扩增传代过程中重要的一环,但是多能干细胞不同于普通细胞系,其增殖扩增过程中需要聚团生长,为保持其细胞活性,不建议单细胞传代。而且使用血清+DMSO冻存方法,不能很好的保持细胞活性,且复苏细胞成活率较低。本文就重点介绍多能干细胞进行冻存以及解冻的标准化步骤。介绍使

日本用ES细胞制成“精子干细胞”:或解不孕难题

  日本京都大学教授斋藤通纪的研究小组在6日的美国科学杂志网络版上发表一项成果:首次在老鼠试验中,由能够成为各种细胞或组织的“胚胎干细胞”(ES细胞)成功在体外制作出了成为精子基础的“精子干细胞”。  报道称,研究小组还确认从该“精子干细胞”产生了精子。据悉,该成果有助于弄清精子的形成机理,促进探明

多能干细胞(ES/iPS)冻存和复苏方法

多能干细胞(ES/iPS)冻存是干细胞扩增传代过程中重要的一环,但是多能干细胞不同于普通细胞系,其增殖扩增过程中需要聚团生长,为保持其细胞活性,不建议单细胞传代。而且使用血清+DMSO冻存方法,不能很好的保持细胞活性,且复苏细胞成活率较低。本文就重点介绍多能干细胞进行冻存以及解冻的标准化步骤。介绍使

Electroporation-of-ES-cells

Cells are routinely passaged two days prior to electroporating. Usually one 10 cm plate at approximately 80% confluency will provide enough cells for

KARYOTYPING-ES-CELLS

An actively growing culture of cells is required, i e 2 - 3 d ES cell culture. The total number of cells needs to be between 106 - 107 cells. N B Re

Human-Embryonic-Stem-(ES)-Cell-Protocols——Freezing-Human-ES-Cells

  Collagenase cells for approximately 7 minutes at 37 °C (until edges of colonies are curling up). With a 5 ml pipet, gently pipet and scrape colon

Human-Embryonic-Stem-(ES)-Cell-Protocols——Thawing-Human-ES-cells

Remove Human ES cells from liquid nitrogen storage tank. Fill out a freeze/thaw form.Thaw cryovial by gently swirling in waterbath until only a small

Human-Embryonic-Stem-(ES)-Cell-Protocols——General-notes-on-ES-cell-culture

hES media has a two week shelf life. hES cells should be cultured in 4, 6, 24, 48, 96 well plates. Growing cells in flasks is not recommended be

Human-Embryonic-Stem-(ES)-Cell-Protocols—Splitting-Human-ES-cells-onMatrige

based on splitting onto on plateWarm collagenase media to 37°C in a water bath.Aspirate media off of cell culture plate.Add the following amount of co

Human-Embryonic-Stem-(ES)-Cell-Protocols——Splitting-Human-ES-cells-on-MEFs

based on splitting onto one plateWarm collagenase IV split media to 37 °C in a water bath.Aspirate media off of cell culture plate.Add the following a

ES细胞分化培养实验——培养皿ES细胞集落

实验材料ES 细胞单一胚胎样体仪器、耗材细菌培养皿ES 分化培养基实验步骤1. 准备下列试剂和材料:悬滴培养的 ES 细胞单一胚胎样体100 mm 细菌培养皿ES 分化培养基2. 在 100 mm 细菌培养皿中加 10 ml 预热的分化培养基。3. 从温箱中取出培养 2 天的悬滴培养物。小心翻转培养

Counting-ES-cell-Chromosomes

(original reference: "tissue culture made easy" by Christian LaMantia from the Magnuson lab) 1) Plate cells onto gelatinized plates (35 or 60 mm) wi

Routine-Culturing-of-ES-Cells

Cell are normally passaged every 2-3 days, this is important to avoid differentiation.Signs of differentiation are:-i) colonies are surrounded by flat

ES-Cell-Culture-and-Manipulation

MediaHigh glucose DMEM (-pyruvate, -glutamine)20% Heat-inactivated Fetal calf serum (can vary by cell type, be sure!!)1X l-glutamine1X Penicillin/stre

FACS-Analysis-of-ES-Cells

Isolate cells and dissociate to single cell suspension (can use Gibco Cell Dissociation Buffer, Accutase or Trypsin)Wash with 10% FBS/DMEM:F12For surf

将基因转移至未分化ES细胞实验——ES细胞电穿孔

实验材料线性化转移基因 DNA未分化 ES 细胞仪器、耗材电穿孔仪和电穿孔杯neoR-MEF 滋养板ES 生长培养基实验步骤1. 准备下列试剂和材料:线性化转移基因 DNA(1 mg/ml,溶于无菌 TE)未分化 ES 细胞Bio-Rad 电穿孔仪和电穿孔杯100 mm neoR-MEF 滋养板ES

Screen-ES-cells-by-Southern-Blot

Digest DNA in 96-well plate To each well add: 4ul 10Xbuffer 4ul Enzyme 0.4ul Spermidine(0.4M) 31.6ul H2O 37‡C 19h, then add 4ul loading dye to each w

ES-and-TS-cell-freezing/thawing

Needed: ES cell freezing medium (2x) 2x ES cell freezing medium should be made up fresh each time it is to be used, and should comprise freshly pre

Differentiate-ES-cells-into-cardiac-myocytes

Day -1: Pass ES cells at normal density on gelatinized plate to free the culture of contamination fibroblast cells. ____________________ Day 1: Try

ES-and-TS-cell-freezing/thawing

实验概要ES and TS cell freezing/thawing.主要试剂ES cell freezing medium (2x)        2x ES cell freezing medium should be made up fresh each time it is to be

ES细胞分化培养实验

实验材料 未分化 ES 细胞试剂、试剂盒 PBS仪器、耗材 ES 分化培养基移液器实验步骤 1. 准备下列试剂和材料:未分化 ES 细胞无 Ca2+ 和 Mg2+ PBSES 分化培养基8 道微量移液器无菌多道移液器容器2. 收获未分化 ES 细胞。3. 在 100 mm 组织培养皿中加 10 ml

ES细胞分化培养实验

悬滴培养 培养皿ES细胞集落 附着ES细胞分化培养             实验材料 未分化 ES 细胞

ES细胞分化培养实验

实验材料单一胚胎样体仪器、耗材组织培养板巴斯德吸管玻璃盖玻片无菌镊子ES 分化培养基实验步骤1. 准备下列试剂和材料:培养悬液中的单一胚胎样体6 孔组织培养板带棉塞巴斯德吸管明胶包被的玻璃盖玻片无菌镊子ES 分化培养基2. 准备明胶包被的玻璃盖玻片3. 用无菌镊子在 6 孔组织培养板的每孔中放一块明

ES细胞打靶技术介绍

你听说过喀迈拉兽(chimera)吗?没错,就是古希腊神话故事中一只会喷火的怪兽,这种怪兽拥有狮头、羊身、蛇尾,像是由几种动物拼成的。或许你知道喀迈拉兽,但你是否知道在生物遗传学中也有一种名为喀迈拉的动物吗?那这神奇的怪兽与我们生物领域中的ES细胞基因打靶到底有什么关系呢?本期话题,咱们就一起来聊聊

ES-Cell-Culture-and-Manipulation3

Care and Handling of Feeder Layer Cells STO/SNL cells are a derivative of the standard STO cell line. They are transformed with a LIF producing pl

Differentiate-ES-cells-into-glial-cells-and-neurons

Day -1: Pass ES cells at normal density on gelatinized plate to free the culture of contamination fibroblast cells. ___________________ Day 1: Tryp

Differentiate-ES-cells-into-cystic-embryoid-bodies

Day -1: Pass ES cells at normal density on gelatinized plate to free the culture of contamination fibroblast cells.______________Day 1: Trypsinized th

ES-Cell-Culture-and-Manipulation2

Picking ES cell clonesOne or two days before picking colonies prepare 24-well plates of feeders. You can also use alternate protocols that utilize 96-

Syngistix-ES软件使用说明

在制药领域,所有计算机化系统必须符合21 CFR Part 11 法规规定,确保分析测试过程中数据的准确性、完整性和可靠性。珀金埃尔默用于其旗下各元素分析平台的Syngistix Enhanced Security™ (ES) 软件可完全支持实验室遵守此规定。针对于元素分析平台之一的NexI

将基因转移至未分化ES细胞实验—将ES克隆挑取到96孔板

仪器、耗材ES 生长培养基neoR-MEF 滋养板96 孔 U-底板无菌吸头微量移液器实验步骤1. 准备下列试剂和材料:ES 生长培养基,含 300 μg/ml G418 和青霉素/链霉素96 孔平底 neoR-MEF 滋养板96 孔 U-底板细而圆的无菌吸头微量移液器(10~100 μl)8 道移