当前位置: X-MOL 学术J. Clin. Invest. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Neuropilin-2–expressing breast cancer cells mitigate radiation-induced oxidative stress through nitric oxide signaling
The Journal of Clinical Investigation ( IF 13.3 ) Pub Date : 2024 , DOI: 10.1172/jci181368
Ayush Kumar, Hira Lal Goel, Christi A. Wisniewski, Tao Wang, Yansong Geng, Mengdie Wang, Shivam Goel, Kai Hu, Rui Li, Lihua J. Zhu, Jennifer L. Clark, Lindsay M. Ferreira, Michael A. Brehm, Thomas J. FitzGerald, Arthur M. Mercurio

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 subpopulations 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-associated protein 1 (KEAP1) and, consequently, nuclear factor erythroid 2-related factor 2–mediated (NFE2L2-mediated) transcription of antioxidant response genes. Inhibiting VEGF binding to NRP2, using a humanized 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 with 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.

中文翻译:


表达神经纤毛蛋白 2 的乳腺癌细胞通过一氧化氮信号转导减轻辐射诱导的氧化应激



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,我们报道了神经纤毛蛋白 2 (NRP2) 是一种血管内皮生长因子 (VEGF) 受体,在具有干细胞特性的 TNBC 细胞亚群中富集,是使 TNBC 对放疗敏感的有效治疗靶点。具体而言,VEGF/NRP2 信号转导通过依赖于 Gli1 的机制诱导一氧化氮合酶 2 (NOS2) 转录。表达 NRP2 的肿瘤细胞是产生一氧化氮 (NO) 的枢纽,一氧化氮 (NO) 是一种自分泌和旁分泌信号代谢物,可促进 Kelch 样 ECH 相关蛋白 1 (KEAP1) 的半胱氨酸亚硝基化,从而促进核因子红细胞 2 相关因子 2 介导的(NFE2L2 介导的)抗氧化反应基因转录。使用人源化 mAb 抑制 VEGF 与 NRP2 的结合,导致 NFE2L2 通过 KEAP1 降解,使细胞系和类器官容易受到辐射。重要的是,与单独放疗相比,用 NRP2 mAb 和放疗治疗患者来源的异种移植物导致显着的肿瘤坏死和消退。总之,这些发现揭示了一种可靶向的放射耐药机制,它们支持使用 NRP2 mAb 作为 TNBC 中的有效放射增敏剂。
更新日期:2024-11-16
down
wechat
bug