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Perfluorooctyl bromide nanoemulsions holding MnO2 nanoparticles with dual-modality imaging and glutathione depletion enhanced HIFU-eliciting tumor immunogenic cell death
Acta Pharmaceutica Sinica B ( IF 14.5 ) Pub Date : 2021-07-31 , DOI: 10.1016/j.apsb.2021.07.025
Xinping Kuai 1 , Yuefei Zhu 2 , Zheng Yuan 3 , Shengyu Wang 4 , Lin Lin 1 , Xiaodan Ye 5 , Yiping Lu 1 , Yu Luo 6 , Zhiqing Pang 2 , Daoying Geng 1 , Bo Yin 1
Affiliation  

Tumor-targeted immunotherapy is a remarkable breakthrough, offering the inimitable advantage of specific tumoricidal effects with reduced immune-associated cytotoxicity. However, existing platforms suffer from low efficacy, inability to induce strong immunogenic cell death (ICD), and restrained capacity of transforming immune-deserted tumors into immune-cultivated ones. Here, an innovative platform, perfluorooctyl bromide (PFOB) nanoemulsions holding MnO2 nanoparticles (MBP), was developed to orchestrate cancer immunotherapy, serving as a theranostic nanoagent for MRI/CT dual-modality imaging and advanced ICD. By simultaneously depleting the GSH and eliciting the ICD effect via high-intensity focused ultrasound (HIFU) therapy, the MBP nanomedicine can regulate the tumor immune microenvironment by inducing maturation of dendritic cells (DCs) and facilitating the activation of CD8+ and CD4+ T cells. The synergistic GSH depletion and HIFU ablation also amplify the inhibition of tumor growth and lung metastasis. Together, these findings inaugurate a new strategy of tumor-targeted immunotherapy, realizing a novel therapeutics paradigm with great clinical significance.



中文翻译:

含有 MnO2 纳米颗粒的全氟辛基溴纳米乳液具有双模式成像和谷胱甘肽消耗增强 HIFU 引发的肿瘤免疫原性细胞死亡

肿瘤靶向免疫疗法是一个显着的突破,它提供了特定的肿瘤杀伤作用和降低免疫相关细胞毒性的独特优势。然而,现有平台存在疗效低、无法诱导强免疫原性细胞死亡(ICD)以及将免疫遗弃肿瘤转化为免疫培养肿瘤的能力受限等问题。在这里,开发了一种创新平台,即含有 MnO 2纳米颗粒 (MBP)的全氟辛基溴 (PFOB) 纳米乳液,用于协调癌症免疫治疗,用作 MRI/CT 双模态成像和高级 ICD 的治疗诊断纳米剂。通过同时消耗 GSH 并通过以下方式引发 ICD 效应在高强度聚焦超声(HIFU)治疗中,MBP纳米药物可以通过诱导树突状细胞(DCs)成熟和促进CD8 +和CD4 + T细胞活化来调节肿瘤免疫微环境。协同的 GSH 耗竭和 HIFU 消融也增强了对肿瘤生长和肺转移的抑制作用。总之,这些发现开创了一种新的肿瘤靶向免疫治疗策略,实现了一种具有重要临床意义的新型治疗模式。

更新日期:2021-07-31
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