The stress-response sensor chop regulates the function and accumulation of myeloid-derived suppressor cells in tumors.
The stress-response sensor chop regulates the function and accumulation of myeloid-derived suppressor cells in tumors.
复制标题
应激反应传感器chop调节肿瘤中骨髓源性抑制细胞的功能和积累。
DOI:
10.1016/j.immuni.2014.08.015
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发表时间:
2014-09-18
期刊:
影响因子:
32.4
通讯作者:
Rodriguez, Paulo C.
中科院分区:
文献类型:
--
作者:
Thevenot, Paul T.;Sierra, Rosa A.;Raber, Patrick L.;Al-Khami, Amir A.;Trillo-Tinoco, Jimena;Zarreii, Parisa;Ochoa, Augusto C.;Cui, Yan;Del Valle, Luis;Rodriguez, Paulo C.
Adaptation of malignant cells to the hostile milieu present in tumors is an important determinant for their survival and growth. However, the interaction between tumor-linked stress and anti-tumor immunity remains poorly characterized. Here, we show the critical role of the cellular stress sensor C/EBP-homologous protein (Chop) in the accumulation and immune inhibitory activity of tumor-infiltrating myeloid-derived suppressor cells (MDSCs). MDSCs lacking Chop had decreased immune regulatory functions and showed the ability to prime T cell function and induce anti-tumor responses. Chop expression in MDSCs was induced by tumor-linked reactive oxygen and nitrogen species and regulated by the activating-transcription factor-4. Chop-deficient MDSCs displayed reduced signaling through CCAAT/enhancer-binding protein-β, leading to a decreased production of interleukin-6 (IL-6) and low expression phospho-STAT3. IL-6 over-expression restored immune suppressive activity of Chop-deficient MDSCs. These findings suggest the role of Chop in tumor-induced tolerance and the therapeutic potential of targeting Chop in MDSCs for cancer immunotherapy.
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