Yantai Yuhuangding hospital, Shandong University, Yantai, 264000, P.R. China.
The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai 264000, P.R. China.
Nanoscale. 2024 Oct 17;16(40):19048-19061. doi: 10.1039/d4nr01307g.
Cancer immunotherapy has demonstrated remarkable efficacy in the treatment of cancer, and it has been successfully applied in the treatment of various solid tumors. However, the response rates to immunotherapy in patients with ovarian cancer remain modest because of the immunosuppressive tumor microenvironment (TME). Tumor-associated macrophages (TAMs) represent the predominant myeloid cell population within the TME, which adopt the protumorigenic M2 phenotype and are blinded by the "don't eat me" signals from tumor cells. These characteristics of TAMs result in insufficient phagocytic activation. In this study, we constructed a SIM@TR-NP-mediated combination therapy of sonodynamic and immunotherapy. SIM@TR-NPs were modified by engineered macrophage membranes with overexpressed sialic acid-binding Ig-like lectin 10 (Siglec-10), and were internally loaded with sonosensitizer 4,4',4'',4'''-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) and immune adjuvant resiquimod. SIM@TR-NPs can block "don't eat me" signals to enhance macrophage phagocytosis and trigger the polarization of TAMs toward the M1 phenotype, thereby improving the immunosuppressive TME. Simultaneously, upon ultrasound irradiation, SIM@TR-NP-mediated sonodynamic therapy (SDT) triggered immunogenic cell death in tumor cells, in combination with TAM-based immunotherapy, transforming the "immune cold tumor" into an "immune hot tumor". SIM@TR-NP-mediated sonodynamic immunotherapy exhibited potent antitumor efficacy in ovarian cancer and exhibited substantial potential for improving the immunosuppressive TME. This study presents an emerging therapeutic regimen for ovarian cancer that synergizes TAM-based antitumor immunotherapy and SDT.
癌症免疫疗法在癌症治疗中显示出显著的疗效,并已成功应用于各种实体肿瘤的治疗。然而,由于免疫抑制性肿瘤微环境(TME),卵巢癌患者对免疫疗法的反应率仍然不高。肿瘤相关巨噬细胞(TAMs)是 TME 中主要的髓样细胞群体,它们表现出促肿瘤生成的 M2 表型,并被肿瘤细胞发出的“不要吃我”信号所蒙蔽。TAMs 的这些特征导致吞噬作用激活不足。在本研究中,我们构建了一种基于 SIM@TR-NP 的声动力学和免疫联合治疗方法。SIM@TR-NPs 被工程化的巨噬细胞膜修饰,这些细胞膜过表达唾液酸结合免疫球蛋白样凝集素 10(Siglec-10),并内部装载声敏剂 4,4',4'',4'''-(卟啉-5,10,15,20-四羧酸)四(苯甲酸)和免疫佐剂瑞喹莫德。SIM@TR-NPs 可以阻断“不要吃我”信号,增强巨噬细胞的吞噬作用,并触发 TAMs 向 M1 表型极化,从而改善免疫抑制性 TME。同时,在超声照射下,SIM@TR-NP 介导的声动力学疗法(SDT)在肿瘤细胞中引发免疫原性细胞死亡,与基于 TAM 的免疫疗法相结合,将“免疫冷肿瘤”转化为“免疫热肿瘤”。SIM@TR-NP 介导的声动力学免疫治疗在卵巢癌中表现出强大的抗肿瘤疗效,并显示出显著改善免疫抑制性 TME 的潜力。本研究为卵巢癌提供了一种新兴的治疗方案,该方案协同了基于 TAM 的抗肿瘤免疫疗法和 SDT。
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