| A Modified Semisolid Clonal Culture for Identification of B-1 and B-2 Progenitor Colony Forming Ability of Mouse Embryonic Hemogenic Endothelial Cells
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Author:
Date:
2020-05-05
[Abstract] The search for the origin of the first hematopoietic stem cells (HSCs) in the mouse embryo has been a hot topic in the field of developmental hematopoiesis. Detecting lymphoid potential is one of the supportive evidence to show the definitive hematopoietic activity of HSCs. However, the first B-lymphoid potential in the mouse embryos are reported to be biased to innate-like B-1 cell lineage that can develop from hemogenic endothelial cells (HECs) independently of HSCs. On the other hand, conventional adaptive immune B cells (B-2) cells are considered to be exclusively derived from HSCs. Therefore, segregating B-1 and B-2 progenitor potential is important to understand the developmental process of HSCs that are also produced from HECs through intermediate precursors referred to as ...
[摘要] [摘要 ] 在搜索起源的第一造血干细胞（HSCs）在小鼠胚胎一直是一个热门话题在该领域发展造血功能。检测淋巴潜力是一个支持性证据显示权威造血活动的造血干细胞然而，据报道，小鼠胚胎中的第一个B淋巴样电位偏向于先天性B-1细胞谱系，该谱系可以从造血内皮细胞（HEC）脱离HSC发育而来。 B细胞（B-2）细胞被认为仅来自HSC。因此，分离B-1和B-2祖细胞的潜力对于理解也由HEC通过中间前体（也称为HEC）产生的HSC的发育过程非常重要。 HECs和pre-HSCs均显示pre-HSCs显示内皮表面表型并需要基质支持以检测其造血活性。利用基质细胞培养后再进行改良的半固体克隆培养的方法使我们能够检测B-1的菌落形成单位数量/ B-2祖细胞最初源自HEC / HSC之前的细胞，将反映B-1偏倚或多谱系繁殖的HSC的潜力。
[背景 ] 半固体克隆培养（甲基纤维素集落形成测定法）是检测造血祖细胞数量的传统方法。一个集落被认为是来自单个祖细胞（克隆来源），添加的细胞因子在细胞的形成中起着重要作用。产量菌落，例如Epo增强了红细胞的菌落形成单位（CFU-E）或红细胞的爆发形成单位（BFU-E），而G-CSF / GM-CSF将增强CFU-G（粒细胞），M ...
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| 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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