| FACS-based Isolation of Neural and Glioma Stem Cell Populations from Fresh Human Tissues Utilizing EGF Ligand
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Author:
Date:
2017-12-20
[Abstract] Direct isolation of human neural and glioma stem cells from fresh tissues permits their biological study without prior culture and may capture novel aspects of their molecular phenotype in their native state. Recently, we demonstrated the ability to prospectively isolate stem cell populations from fresh human germinal matrix and glioblastoma samples, exploiting the ability of cells to bind the Epidermal Growth Factor (EGF) ligand in fluorescence-activated cell sorting (FACS). We demonstrated that FACS-isolated EGF-bound neural and glioblastoma populations encompass the sphere-forming colonies in vitro, and are capable of both self-renewal and multilineage differentiation. Here we describe in detail the purification methodology of EGF-bound (i.e., EGFR+) human neural and ...
[摘要] 从新鲜组织中直接分离人类神经和胶质瘤干细胞允许其在没有事先培养的情况下进行生物学研究，并且可以在其天然状态中捕获其分子表型的新方面。最近，我们展示了前瞻性地从新鲜人类生发基质和胶质母细胞瘤样品中分离干细胞群的能力，利用细胞在荧光激活细胞分选（FACS）中结合表皮生长因子（EGF）配体的能力。我们证明FACS分离的EGF结合的神经和成胶质细胞瘤细胞群体在体外包含球体形成的集落，并且能够自我更新和多向分化。在此我们详细描述了具有来自新鲜死亡和手术组织的干细胞特性的EGF-结合（即EGFR +）人类神经和胶质瘤细胞的纯化方法。利用天然配体结合能力前瞻性分离干细胞群的能力为了解非培养条件下的正常和肿瘤细胞生物学打开了新的门，并且适用于在种群和单细胞分辨率下的各种下游分子测序研究。
【背景】由于缺乏通用的神经和神经胶质瘤干细胞标志物（Lathia et al。，2015）以及频繁依赖于培养的细胞，理解人神经和胶质瘤干细胞的内在生物学一直是一个挑战比那些直接从组织分离的。跨膜糖蛋白Prominin或CD133是分离神经（Uchida等，2000）和神经胶质瘤干细胞（GSC）（Singh等，2000）的最好描述和经常使用的干细胞标记物之一。等人，2003; Singh等人，2004; ...
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| In vitro and in vivo Limiting Dilution Assay for Colorectal Cancer
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Author:
Date:
2015-11-20
[Abstract] The in vitro limiting dilution assay is used to determine the colorectal cancer initiating cell (CC-IC) frequency of a CC-IC enriched suspension culture, grown in growth factor enriched serum free media. The in vivo limiting dilution assay is used to determine the colorectal cancer initiating cell frequency of a primary colorectal cancer sample or an established suspension cell line using immunocompromised murine xenograft models. In vitro and in vivo limiting dilution assays (LDAs) can be used to determine the effect of a specific treatment or genetic knockdown strategy on the initiating cell frequency of a population of CC-ICs or colorectal cancer sample, respectively.
[摘要] 体外极限稀释测定法用于测定在富含生长因子的无血清培养基中生长的CC-IC富集悬浮培养物的结肠直肠癌起始细胞（CC-IC）频率。 体内限制性稀释测定法用于使用免疫受损的鼠异种移植物模型确定原发性结肠直肠癌样品或建立的悬浮细胞系的结肠直肠癌起始细胞频率。 可以使用体外和体内有限稀释测定法（LDAs）来确定特定处理或遗传击倒策略对CC- IC或结肠直肠癌样品。
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