
Cellartis Definitive Endoderm Cells (from ChiPSC18) are human definitive endoderm (DE) cells derived from the human induced pluripotent stem cell line ChiPSC18. The hiPS cells have been differentiated into definitive endoderm cells in vitro to generate a population of >90% SOX17 protein-expressing cells; they are then dissociated into a cell suspension and cryopreserved. These DE cells are suitable for further differentiation into hepatocytes or pancreatic endoderm cells.
Cellartis Definitive Endoderm Cells (from ChiPSC18) are human definitive endoderm (DE) cells derived from the human induced pluripotent stem cell line ChiPSC18. The hiPS cells have been differentiated into definitive endoderm cells in vitro to generate a population of >90% SOX17 protein-expressing cells; they are then dissociated into a cell suspension and cryopreserved. These DE cells are suitable for further differentiation into hepatocytes or pancreatic endoderm cells. To differentiate the DE cells into hepatocytes, use the Cellartis Hepatocyte Differentiation Kit (Cat. # Y30050).
During the differentiation process that creates Cellartis Definitive Endoderm Cells (from ChiPSC18), the mRNA expression profile—as measured by RT-qPCR—shows the expected temporal expression of endodermal markers SOX17, FOXA2, FZD5, CXCR4, HHEX, and SOX7; mesoendodermal marker Brachyury; and pluripotency marker OCT4.
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各位版友求助,
我使用Hek293构建转染模型,瞬转5质粒,用lipo2000做转染体系。
转染48h,发现荧光较强的细胞都在爬片的边缘,比例十分少。是因为我添加试剂的手法不对吗。
同时也发现加入转染体系后细胞状态特别差。想问一下用lipo2000时可以用无双抗的10%FBSDMEM吗。我转染前6h现在用的是纯DMEM,不含FBS。
请各位大神帮忙
我刚开始做转染,悬浮细胞,分别做过表达和敲减,看了很多文献,大都没有提及转染后是用转染的这同一批细胞同时做pcr,wb,cck8,凋亡,细胞周期;还是说这次转染只做pcr或wb,再转染一次做cck8或细胞周期。剩下的功能试验均同前,转染一次做一次?我养的是悬浮细胞,转染后做cck8这些功能试验前需要离心换液吗?跪谢解答!
“转化”是指含外源基因的重组质粒(载体)将外源基因直接导入原核细胞(如细菌);
“转导”指通过重组病毒载体将外源基因导入真核细胞或原核细胞;
“转染”指重组质粒载体或游离核苷酸在脂质体等介导下进入真核细胞;
“感染”在基因转移实验中强调重组病毒载体入侵受体细胞的过程。
在使用这4 个名词时, 应仔细分析基因转移实验的四要素——转移物、载体、介导方法、受体细胞类型,而正确区 分载体和受体细胞类型是辨析的关键点。当载体是重组质粒时,如受体细胞是原核细胞应使 用“转化”,如受体细胞是真核细胞则使用“转染”;当载体是重组病毒时,如强调转移物进 入受体细胞应使用“转导”,如强调重组病毒载体进入受体细胞的过程则使用“感染”。
其次要看下你选择单位的规模如何,做的比较好的,还是上海这边的,你可以看下基尔顿生物,原代细胞培养,动物造模,整体课题外包。
本人研究生
GFP发出绿色荧光的原理是Ca离子进入GFP的beta-barrel结构中引起的特定能级,因此只要这个结构仍然保持着,就可以发出荧光。
由于GFP的beta-barrel结构非常稳定,一些版本的GFP蛋白(如EGFP)甚至能抵抗94C的高温几分钟而不完全变性,因此想在溶液状态下去掉GFP的荧光是很难的,一般需要用光漂白法。
基于其非常稳定的结构,即便细胞被固定了,仍然会有一部分的GFP蛋白保持其构象而发出荧光。此时荧光可能较弱。在荧光显微镜下是有可能看得到的。

