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STIM1 and STIM2 Mediate Cancer-Induced Inflammation in T Cell Acute Lymphoblastic Leukemia.
Cell Reports ( IF 7.5 ) Pub Date : 2018-Sep-11 , DOI: 10.1016/j.celrep.2018.08.030
Shella Saint Fleur-Lominy 1 , Mate Maus 2 , Martin Vaeth 2 , Ingo Lange 2 , Isabelle Zee 2 , David Suh 2 , Cynthia Liu 2 , Xiaojun Wu 2 , Anastasia Tikhonova 3 , Iannis Aifantis 3 , Stefan Feske 3
Affiliation  

T cell acute lymphoblastic leukemia (T-ALL) is commonly associated with activating mutations in the NOTCH1 pathway. Recent reports have shown a link between NOTCH1 signaling and intracellular Ca2+ homeostasis in T-ALL. Here, we investigate the role of store-operated Ca2+ entry (SOCE) mediated by the Ca2+ channel ORAI1 and its activators STIM1 and STIM2 in T-ALL. Deletion of STIM1 and STIM2 in leukemic cells abolishes SOCE and significantly prolongs the survival of mice in a NOTCH1-dependent model of T-ALL. The survival advantage is unrelated to the leukemic cell burden but is associated with the SOCE-dependent ability of malignant T lymphoblasts to cause inflammation in leukemia-infiltrated organs. Mice with STIM1/STIM2-deficient T-ALL show a markedly reduced necroinflammatory response in leukemia-infiltrated organs and downregulation of signaling pathways previously linked to cancer-induced inflammation. Our study shows that leukemic T lymphoblasts cause inflammation of leukemia-infiltrated organs that is dependent on SOCE.

中文翻译:


STIM1 和 STIM2 介导 T 细胞急性淋巴细胞白血病中癌症诱发的炎症。



T 细胞急性淋巴细胞白血病 (T-ALL) 通常与 NOTCH1 通路的激活突变有关。最近的报告显示了 T-ALL 中 NOTCH1 信号传导与细胞内 Ca 2+稳态之间的联系。在这里,我们研究了 Ca 2+通道 ORAI1 及其激活剂 STIM1 和 STIM2 介导的钙池操纵的 Ca 2+进入 (SOCE) 在 T-ALL 中的作用。在白血病细胞中删除 STIM1 和 STIM2 可消除 SOCE,并显着延长 NOTCH1 依赖性 T-ALL 模型中小鼠的存活时间。生存优势与白血病细胞负荷无关,但与恶性T淋巴细胞在白血病浸润器官中引起炎症的SOCE依赖性能力相关。患有 STIM1/STIM2 缺陷的 T-ALL 小鼠在白血病浸润的器官中表现出明显减少的坏死性炎症反应,并且先前与癌症引起的炎症相关的信号通路下调。我们的研究表明,白血病 T 淋巴细胞会引起白血病浸润器官的炎症,这种炎症依赖于 SOCE。
更新日期:2018-09-12
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