| Modeling NOTCH1 driven T-cell Acute Lymphoblastic Leukemia in Mice
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Author:
Date:
2020-05-20
[Abstract] T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematological malignancy that arises from transformation of T-cell primed hematopoietic progenitors. Although T-ALL is a heterogenous and molecularly complex disease, more than 65% of T-ALL patients carry activating mutations in the NOTCH1 gene. The majority of T-ALL–associated NOTCH1 mutations either disrupt the negative regulatory region, allowing signal activation in the absence of ligand binding, or result in truncation of the C-terminal PEST domain involved in the termination of NOTCH1 signaling by ...
[摘要] [摘要 ] T细胞急性淋巴细胞白血病（T-ALL）是一种侵袭性血液恶性肿瘤，其起源于T细胞引发的造血祖细胞的转化。尽管T-ALL是一种异质且分子复杂的疾病，但超过65％的T-ALL患者在NOTCH1 基因中带有激活突变。大多数与T-ALL相关的NOTCH1 突变要么破坏负调控区，允许在没有配体结合的情况下激活信号，要么导致蛋白酶体降解终止NOTCH1信号终止所涉及的C末端PEST域被截短。迄今为止，逆转录病毒转导模型在很大程度上依赖于侵袭性截短的变种的过度表达。 NOTCH1 （例如ICN1或ΔE-NOTCH1）可导致信号传导的超生理水平，并且在人类T-ALL中很少见。当前方案描述了小鼠骨髓分离，造血干细胞和祖细胞（HSC）富集，然后逆转录病毒转导的致癌突变体形式的NOTCH1受体（NOTCH1-L1601P-ΔP）的方法，该方法与获功能突变最常见于患者样品中。组成型活性NOTCH1的这种强制表达的标志是胸腺外未成熟T细胞发育的瞬时波，此波在致癌性转化为T-ALL之前。此外，该方法通过允许白血病细胞与微环境之间的串扰来模拟体内白血病的转化和进展，这是基于细胞系的体外研究无法解释的一个方面。因此，HSC转导和移植模型更真实地概括了人类疾病的发展，为进一步的体内和离体功能研究提供了高度全面和通用的工具。
[背景 ] ...
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| 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. ...
[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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| Bone Marrow Derived Eosinophil Cultures
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Author:
Date:
2014-06-20
[Abstract] Eosinophils are multifunctional effector cells implicated in the pathogenesis of a variety of diseases including asthma, eosinophil gastrointestinal disorders and helminth infection. Mouse bone marrow derived progenitor cells can be differentiated into eosinophils following IL-5 exposure. These bone marrow derived eosinophils are fully differentiated at the end of a 14 day culture based on morphology and expression of molecular markers.
[摘要] 嗜酸性粒细胞是涉及多种疾病的发病机理的多功能效应细胞，包括哮喘，嗜酸性粒细胞胃肠道疾病和蠕虫感染。 小鼠骨髓来源的祖细胞可以在IL-5暴露后分化成嗜酸性粒细胞。 这些骨髓衍生的嗜酸性粒细胞在14天培养结束时基于分子标志物的形态学和表达完全分化。
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