Extrinsic Phagocyte-Dependent STING Signaling Dictates the Immunogenicity of Dying Cells.

Extrinsic Phagocyte-Dependent STING Signaling Dictates the Immunogenicity of Dying Cells.
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DOI:
10.1016/j.ccell.2018.03.027
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发表时间:
2018-05-14
期刊:
影响因子:
50.3
通讯作者:
Barber GN
Barber GN
中科院分区:
医学1区
文献类型:
--
作者:
Ahn J;Xia T;Rabasa Capote A;Betancourt D;Barber GN

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垂死细胞激活抗原呈递细胞 (APC) 的能力受到仔细控制,以避免不必要的炎症反应。在这里,我们表明,含有胞质 dsDNA(病毒或合成)或环状二核苷酸 (CDN) 的吞噬细胞能够通过外在 STING 信号传导刺激 APC,以促进抗原交叉呈递。在没有 STING 激动剂的情况下,垂死细胞对反式 APC 的刺激无效。包括 CDN 在内的胞质 STING 激活剂构成了仅由病毒感染或 DNA 损伤事件后产生的细胞危险相关分子模式,使肿瘤细胞具有高度免疫原性。我们的数据深入了解了驱动适当的抗肿瘤适应性免疫反应的分子机制,同时避免有害的自身炎症性疾病,并为癌症治疗提供了治疗策略。
The ability of dying cells to activate antigen presenting cells (APCs) is carefully controlled to avoid unwarranted inflammatory responses. Here we show that engulfed cells containing cytosolic dsDNA species (viral or synthetic) or cyclic di-nucleotides (CDNs) are able to stimulate APCs, via extrinsic STING-signaling, to promote antigen cross-presentation. In the absence of STING agonists, dying cells were ineffectual in the stimulation of APCs in trans. Cytosolic STING activators, including CDNs, constitute cellular danger associated molecular patterns only generated by viral infection or following DNA-damage events, that rendered tumor cells highly immunogenic. Our data sheds insight into the molecular mechanisms that drive appropriate anti-tumor adaptive immune responses, while averting harmful autoinflammatory disease, and provides a therapeutic strategy for cancer treatment.
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