Lineage analysis of basal epithelial cells reveals their unexpected plasticity and supports a cell-of-origin model for prostate cancer heterogeneity.

Lineage analysis of basal epithelial cells reveals their unexpected plasticity and supports a cell-of-origin model for prostate cancer heterogeneity.
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DOI:
10.1038/ncb2697
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发表时间:
2013-03
影响因子:
21.3
通讯作者:
--
中科院分区:
生物学1区
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--
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癌症生物学中的一个关键问题是,成人组织中不同来源细胞类型的致癌转化是否会产生不同的肿瘤亚型,这些亚型在预后和/或治疗反应上存在差异。我们现在表明,在小鼠模型中基底或腔上皮细胞中前列腺肿瘤的起始导致具有不同分子特征的肿瘤,这些分子特征可预测人类患者的预后。此外,我们对未转化基底细胞的分析显示,在前列腺再生和成人组织稳态过程中,与遗传谱系追踪相比,它们在球体形成和移植试验中的干细胞特性出乎意料地依赖于检测。尽管基底细胞的癌性转化导致了具有腔型表型的肿瘤,但跨物种生物信息学分析表明,腔源性肿瘤比基底源性肿瘤更具侵袭性,并确定了与患者预后相关的分子特征。我们的研究结果揭示了基底细胞固有的可塑性,并支持了不同来源的细胞产生不同前列腺癌分子亚型的模型。
A key issue in cancer biology is whether oncogenic transformation of different cell types of origin within an adult tissue gives rise to distinct tumor subtypes that differ in their prognosis and/or treatment response. We now show that initiation of prostate tumors in basal or luminal epithelial cells in mouse models results in tumors with distinct molecular signatures that are predictive of human patient outcomes. Furthermore, our analysis of untransformed basal cells reveals an unexpected assay-dependence of their stem cell properties in sphere formation and transplantation assays versus genetic lineage-tracing during prostate regeneration and adult tissue homeostasis. Although oncogenic transformation of basal cells gives rise to tumors with luminal phenotypes, cross-species bioinformatic analyses indicate that luminal origin tumors are more aggressive than basal origin tumors, and identify a molecular signature associated with patient outcome. Our results reveal the inherent plasticity of basal cells, and support a model in which different cells of origin generate distinct molecular subtypes of prostate cancer.
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