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    • 8. 发明申请
    • PROSPECTIVE IDENTIFICATION AND CHARACTERIZATION OF BREAST CANCER STEM CELLS
    • 乳腺癌干细胞的前瞻性鉴定和表征
    • WO2003050502A2
    • 2003-06-19
    • PCT/US2002/039191
    • 2002-12-06
    • REGENTS OF THE UNIVERSITY OF MICHIGANCLARKE, Michael, F.WICHA, Max, S.AL-HAJJ, Mohammad
    • CLARKE, Michael, F.WICHA, Max, S.AL-HAJJ, Mohammad
    • G01N
    • C07K16/28A61K38/1703A61K47/6897A61K47/6901A61K2039/505B82Y5/00C07K16/3015C12N5/0695
    • Human breast tumors contain heterogeneous cancer cells. Using an animal xenograft model in which human breast cancer cells were grown in immunocompromised mice, we found that only a small minority of breast cancer cells had the capacity to form new tumors. The ability to form new tumors was not a stochastic property, rather certain populations of cancer cells were depleted for the ability to form new tumors, while other populations were enriched for the ability to form new tumors. Tumorigenic cells could be distinguished from non-tumorigenic cancer cells based on surface marker expression. We prospectively identified and isolated the tumorigenic cells as CD44 + CD24 -/lo LINEAGE - . As few as 100 cells from this population were able to form tumors the animal xenograft model, while tens of thousands of cells from non-tumorigenic populations failed to form tumors. The tumorigenic cells could be serially passaged, each time generating new tumors containing an expanded numbers of CD44 + CD24 -/low Lineage?- ¿tumorigenic cells as well as phenotypically mixed populations of non-tumorigenic cancer cells. This is reminiscentof the ability of normal stem cells to self-renew and differentiate. The expression of potential therapeutic targets also differed between the tumorigenic and non-tumorigenic populations. Notch activation promoted the survival of the tumorigenic cells, and a blocking antibody against Notch4 induced tumorigenic breast cancer cells to undergo apoptosis.
    • 人乳腺肿瘤包含异质癌细胞。 使用动物异种移植模型,其中人乳腺癌细胞在免疫受损小鼠中生长,我们发现只有少数乳腺癌细胞具有形成新肿瘤的能力。 形成新肿瘤的能力不是随机性质,而是癌细胞的某些群体耗尽形成新肿瘤的能力,而其他群体则富集形成新肿瘤的能力。 基于表面标志物表达,致瘤细胞可以与非致瘤性癌细胞区分开。 我们前瞻性地将致瘤细胞鉴定并分离为CD44 + CD24 < - / lo> LINEAGE - 。 来自该群体的少至100个细胞能够形成肿瘤动物异种移植模型,而来自非致瘤基因群的数万个细胞未能形成肿瘤。 致瘤细胞可以连续传代,每次产生含有扩增数量的CD44 + CD24 - / low> Lineage - 致瘤细胞的新肿瘤以及非致瘤性癌细胞的表型混合群体。 这让人想起正常干细胞自我更新和分化的能力。 潜在的治疗靶点的表达也在致瘤性和非致瘤性群体之间不同。 Notch活化促进致瘤细胞的存活,并且阻断Notch4诱导的致瘤性乳腺癌细胞进行细胞凋亡的抗体。