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    Science. 2007 Dec 14;318(5857):1722; author reply 1722.

    Comment on "Tumor growth need not be driven by rare cancer stem cells".

    Source

    Division of Cell and Molecular Biology, University Health Network, Toronto, Canada.

    Abstract

    Kelly et al. (Brevia, 20 July 2007, p. 337) questioned xenotransplant experiments supporting the cancer stem cell (CSC) hypothesis because they found a high frequency of leukemia-initiating cells (L-IC) in some transgenic mouse models. However, the CSC hypothesis depends on prospective purification of cells with tumor-initiating capacity, irrespective of frequency. Moreover, we found similar L-IC frequencies in genetically comparable leukemias using syngeneic or xenogeneic models.

    PMID:
    18079385
    [PubMed - indexed for MEDLINE]

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