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    • 9. 发明申请
    • NOX2 AS A BIOMARKER OF RADIOTHERAPY EFFICIENCY IN CANCER PATIENTS
    • NOX2作为癌症患者放射治疗效果的生物标志物
    • WO2018050928A1
    • 2018-03-22
    • PCT/EP2017/073677
    • 2017-09-19
    • INSTITUT GUSTAVE-ROUSSY
    • PERFETTINI, Jean-LucDEUTSCH, EricALLOUCH, Awatef
    • C12Q1/68G01N33/574
    • C12Q1/6886C12Q2600/106C12Q2600/158G01N33/57419G01N2800/52
    • Although tumor-associated macrophages have been extensively studied in the control of response to radiotherapy, the molecular mechanisms involved in the ionizing radiation-mediated activation of macrophages remain elusive. Here the present inventors show that ionizing radiation induces the expression of interferon-regulatory factor 5 (IRF5) promoting thus macrophage activation toward a pro-inflammatory phenotype. They reveal that the activation of the Ataxia telangiectasia mutated (ATM) kinase is required for ionizing radiation-elicited macrophage activation, but also for macrophage reprogramming after treatments with γ-interferon, lipopolysaccharide or chemotherapeutic agent (such as cis-platin), underscoring the fact that the kinase ATM plays a central role during macrophage phenotypic switching toward a proinflammatory phenotype. They further demonstrate that NADPH oxidase 2 (NOX2)-dependent ROS production is upstream to ATM activation and is essential during this process. They also report that hypoxic conditions and the inhibition of any component of this signaling pathway (NOX2, ROS and ATM) impairs pro-inflammatory activation of macrophages and predicts a poor tumor response to preoperative radiotherapy in locally advanced rectal cancer. Altogether, these results identify a novel signaling pathway involved in macrophage activation that may enhance effectiveness of radiotherapy through the re-programming of tumor infiltrating macrophages.
    • 虽然肿瘤相关巨噬细胞已广泛研究了放疗反应的控制,但涉及电离辐射介导的巨噬细胞活化的分子机制仍然难以捉摸。 在此,本发明人表明,电离辐射诱导干扰素调节因子5(IRF5)的表达,从而促进巨噬细胞活化为促炎症表型。 他们揭示,激活共济失调毛细血管扩张突变(ATM)激酶是电离辐射引起的巨噬细胞激活所必需的,而且在γ-干扰素,脂多糖或化学治疗剂(如顺铂)治疗后用于巨噬细胞重编程需要,强调 事实上激酶ATM在巨噬细胞表型转换为促炎症表型过程中起着核心作用。 他们进一步证明NADPH氧化酶2(NOX2)依赖性ROS产生在ATM激活的上游,并且在此过程中是必不可少的。 他们还报告说,缺氧条件和这种信号通路的任何成分(NOX2,ROS和ATM)的抑制都会损害巨噬细胞的促炎激活,并预测局部晚期直肠癌术前放疗的肿瘤反应差。 总之,这些结果确定了涉及巨噬细胞活化的新信号通路,其可通过重新编程肿瘤浸润巨噬细胞来提高放射疗法的有效性。