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相关概念视频

Adult Stem Cells01:33

Adult Stem Cells

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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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一种可能的乳腺干细胞系.

D C Bennett, L A Peachey, H Durbin

    Cell
    |September 1, 1978
    PubMed
    概括

    从乳腺瘤中获得的Rama 25大鼠细胞系表现出类似干细胞的特性. 它可以分化为分泌细胞和肌上皮细胞,这表明乳腺干细胞起源.

    科学领域:

    • 细胞生物学 细胞生物学
    • 发展生物学 发展生物学
    • 癌症研究 癌症研究

    背景情况:

    • 拉玛25细胞系起源于大鼠乳腺瘤中,这种瘤是由二甲基桑烯诱导的.
    • 拉玛25细胞最初在快速增殖过程中呈现为单个不分化的上皮类型.

    研究的目的:

    • 为了研究Rama 25细胞系的分化潜力.
    • 以高细胞密度的Rama 25培养产生的细胞类型的特征.
    • 探索Rama 25作为乳腺干细胞模型的潜力.

    主要方法:

    • 光和电子显微镜检查细胞形态.
    • 免疫光染色用于素以识别分泌细胞标记物.
    • 克隆细胞系以分离特定的细胞类型 (例如,Rama 29).
    • 使用免疫缺陷小鼠进行体内研究,以评估瘤形成和上皮特征.

    主要成果:

    • 在高细胞密度下,Rama 25培养会产生类似于乳腺分泌细胞和肌皮细胞的细胞.
    • 这些差异化的细胞类型是Rama 25系固有的,而不是污染物,克隆证实了这一点.
    • 甲基二硫氧化物治疗会影响分化细胞类型的比例.
    • 在小鼠中由Rama 25细胞形成的瘤表现出特定的上皮特征.

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    结论:

    • 拉玛25细胞系拥有类似干细胞的群体,能够分化为分泌和肌皮细胞系.
    • 这表明Rama 25可以作为研究乳腺发育和干细胞分化的一个有价值的模型.
    • 孤立的Rama 29细胞系代表了一种特征性的肌上皮样细胞群.