乳腺癌中表达 Neuropilin-2 的细胞是 S-亚硝基化枢纽,可减轻辐射诱导的氧化应激。

IF 13.3 1区 医学 Q1 MEDICINE, RESEARCH & EXPERIMENTAL Journal of Clinical Investigation Pub Date : 2024-10-01 DOI:10.1172/JCI181368
Ayush Kumar, Hira Goel, Christi Wisniewski, Tao Wang, Yansong Geng, Mengdie Wang, Shivam Goel, Kai Hu, Rui Li, Lihua J Zhu, Jennifer L Clark, Lindsay M Ferreira, Michael Brehm, Thomas J Fitzgerald, Arthur M Mercurio
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引用次数: 0

摘要

三阴性乳腺癌(TNBC)放疗后的高复发率表明,需要新的方法和靶点来提高放射敏感性。在这里,我们报告了神经鞘氨醇-2(NRP2)是血管内皮生长因子(VEGF)的受体,它富集在具有干细胞特性的TNBC细胞亚群中,是使TNBC对放疗敏感的有效治疗靶点。具体来说,VEGF/NRP2信号通过依赖Gli1的机制诱导一氧化氮合酶2(NOS2)转录。NRP2表达的肿瘤细胞是产生一氧化氮(NO)的枢纽,一氧化氮是一种自分泌和旁分泌信号代谢产物,它促进Kelch样ECH相关蛋白1(KEAP1)的半胱氨酸-亚硝基化,进而促进核因子红细胞2相关因子2(NFE2L2)介导的抗氧化反应基因的转录。使用人源化单克隆抗体(mAb)抑制血管内皮生长因子与 NRP2 的结合会导致 NFE2L2 通过 KEAP1 降解,从而使细胞系和器官组织易受辐照影响。重要的是,用 NRP2 mAb 和辐射处理患者衍生的异种移植物会导致肿瘤显著坏死和消退,而只用辐射则不会导致肿瘤坏死和消退。这些发现共同揭示了放射抗性的靶向机制,并支持使用 NRP2 mAb 作为 TNBC 的有效放射增敏剂。
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Neuropilin-2 expressing cells in breast cancer are S-nitrosylation hubs that mitigate radiation-induced oxidative stress.

The high rate of recurrence after radiation therapy in triple-negative breast cancer (TNBC) indicates that novel approaches and targets are needed to enhance radiosensitivity. Here, we report that neuropilin-2 (NRP2), a receptor for vascular endothelial growth factor (VEGF) that is enriched on sub-populations of TNBC cells with stem cell properties, is an effective therapeutic target for sensitizing TNBC to radiotherapy. Specifically, VEGF/NRP2 signaling induces nitric oxide synthase 2 (NOS2) transcription by a mechanism dependent on Gli1. NRP2-expressing tumor cells serve as a hub to produce nitric oxide (NO), an autocrine and paracrine signaling metabolite, which promotes cysteine-nitrosylation of Kelch-like ECH-asssociated protein 1 (KEAP1) and, consequently, nuclear factor erythroid 2-related factor 2 (NFE2L2)-mediated transcription of antioxidant response genes. Inhibiting VEGF binding to NRP2, using a humanized monoclonal antibody (mAb), results in NFE2L2 degradation via KEAP1 rendering cell lines and organoids vulnerable to irradiation. Importantly, treatment of patient-derived xenografts with the NRP2 mAb and radiation resulted in significant tumor necrosis and regression compared to radiation alone. Together, these findings reveal a targetable mechanism of radioresistance and they support the use of NRP2 mAb as an effective radiosensitizer in TNBC.

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来源期刊
Journal of Clinical Investigation
Journal of Clinical Investigation 医学-医学:研究与实验
CiteScore
24.50
自引率
1.30%
发文量
1034
审稿时长
2 months
期刊介绍: The Journal of Clinical Investigation, established in 1924 by the ASCI, is a prestigious publication that focuses on breakthroughs in basic and clinical biomedical science, with the goal of advancing the field of medicine. With an impressive Impact Factor of 15.9 in 2022, it is recognized as one of the leading journals in the "Medicine, Research & Experimental" category of the Web of Science. The journal attracts a diverse readership from various medical disciplines and sectors. It publishes a wide range of research articles encompassing all biomedical specialties, including Autoimmunity, Gastroenterology, Immunology, Metabolism, Nephrology, Neuroscience, Oncology, Pulmonology, Vascular Biology, and many others. The Editorial Board consists of esteemed academic editors who possess extensive expertise in their respective fields. They are actively involved in research, ensuring the journal's high standards of publication and scientific rigor.
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