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[資源]
【資源】Cancer: Predictions in lymphoma
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The presence of a specific cell type in people with lymphoma is negatively associated with survival, providing a new biomarker with potential clinical applications (Proc. Natl. Acad. Sci. USA 107, 12747–12754). Jonathan Irish et al. used single-cell profiling in samples of human follicular lymphoma and found a subset of lymphoma cells with defective B cell antigen receptor (BCR) signaling. Jonathan Irish The more of these cells in each tumor, the shorter the overall subject survival. Moreover, these lymphoma cells increased in number as tumors relapsed after chemotherapy. Interestingly, BCR signaling could be reactivated in the defective cells, indicating that BCR signaling was not altogether absent but somehow suppressed. Mechanistically, tumors with high counts of defective BCR cells had less interleukin-7 signaling in infiltrating T cells, but additional work will be required to understand how these cells emerge and what their downstream effects are. In addition to representing a potential biomarker, the existence of cells with defective BCR signaling may provide new targets against follicular lymphoma.—JCL |
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癌癥:淋巴瘤中的預(yù)測因子 淋巴瘤病人中特異細(xì)胞類型的存在與病人的生存呈負(fù)相關(guān),該發(fā)現(xiàn)可提供一種新的生物標(biāo)記物,并具有潛在的臨床意義。 在濾泡性淋巴瘤樣本中使用單細(xì)胞仿形切削技術(shù)發(fā)現(xiàn)了一些具有缺陷B細(xì)胞抗原受體(BCR)信號的淋巴瘤細(xì)胞。每個腫瘤中這些細(xì)胞越多,病人的生存期越短。而且,當(dāng)化療后腫瘤復(fù)發(fā)時這些淋巴瘤細(xì)胞數(shù)量上增加。令人感興趣的是,在這些缺陷細(xì)胞中BCR信號可能重新活化,提示BCR信號不是一起缺乏而是有些被抑制了。 機(jī)制上,伴有較高數(shù)量缺陷BCR的腫瘤在浸潤的T細(xì)胞中較少表達(dá)IL-7信號,但需要另外的工作來理解這些細(xì)胞是如何出現(xiàn)的和它們的下游效應(yīng)是什么。 除了代表潛在的生物標(biāo)記物外,伴有缺陷BCR信號的細(xì)胞存在可提供濾泡性淋巴瘤新的靶點(diǎn)。 |
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