J Clin Invest:研究发现帮助对抗侵袭性乳腺癌的免疫细胞!

2017-08-22 枫丹白露 来宝网

乳腺癌仍然是美国妇女与癌症相关死亡的主要原因。早期检测和靶向治疗改善了整体患者的疗效,但这些因素也深刻影响了预后。缺乏雌激素,孕激素和人类表皮生长因子2(HER2)激素受体表达的所谓“三阴”乳腺癌不能被现有的激素治疗所靶向,患者生存率差。三阴性乳腺癌的claudin-low亚型的特征在于其特异性较差的预后,以及肿瘤微环境中免疫细胞浸润的显著更高的速率。虽然观察结果表明,乳腺癌亚型中免疫浸润与患者预



免疫细胞有助于侵袭性乳腺癌的治疗】乳腺癌仍然是美国妇女与癌症相关死亡的主要原因。早期检测和靶向治疗改善了整体患者的疗效,但这些因素也深刻影响了预后。缺乏雌激素,孕激素和人类表皮生长因子2(HER2)激素受体表达的所谓“三阴”乳腺癌不能被现有的激素治疗所靶向,患者生存率差。三阴性乳腺癌的claudin-low亚型的特征在于其特异性较差的预后,以及肿瘤微环境中免疫细胞浸润的显着更高的速率。虽然观察结果表明,乳腺癌亚型中免疫浸润与患者预后呈负相关,但该联系尚未确定。

UNC Chapel Hill的Lineberger癌症中心的Jon Serody实验室的研究人员试图确定肿瘤浸润的免疫细胞如何有助于乳腺肿瘤生长和对免疫靶向治疗的反应。他们最近在JCI发表的工作报告说,低密度乳腺肿瘤包含大量的调节性T细胞(Tregs),一种抑制免疫系统活性的免疫细胞。在乳腺癌的小鼠模型中,检查点抑制治疗(免疫靶向治疗)不能减少紧密连接蛋白的肿瘤的生长。研究确定,在检查点抑制治疗期间,Treg的增加干扰了免疫靶向,从而为紧密连锁的肿瘤提供了保护。与这种机制一致,当Tregs耗尽时,检查点抑制治疗延缓了这些小鼠的肿瘤生长。

这些发现表明干扰Treg招募到肿瘤是改善针对三阴性乳腺癌的靶向治疗的潜在策略。此外,他们支持这样一种观念,即确定乳腺癌亚型的免疫特征可以更准确和快速地应用有效的治疗方法,这可能会改善患者的预后。

原始出处:

Nicholas A. Taylor et al. Treg depletion potentiates checkpoint inhibition in claudin-low breast cancer. Journal of Clinical Investigation (2017). DOI: 10.1172/JCI90499.

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    2017-08-24 sunyl07
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    2017-08-22 清风拂面

    谢谢分享.学习受益匪浅

    0

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