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Chemotherapy based on "Domino-effect" combined with immunotherapy amplifying the efficacy of an anti-metastatic treatment.
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2020-09-15 , DOI: 10.1039/d0tb01061h
Bin Du 1 , Qian Du 1 , Yimeng Bai 1 , Lili Yu 1 , Yuehua Wang 1 , Jingshu Huang 1 , Mei Zheng 1 , Guopeng Shen 2 , Jie Zhou 1 , Hanchun Yao 1
Affiliation  

In tumor immunotherapy, Treg cells are immunosuppressive cells. In general, the main strategy of chemo immune-therapy for Treg cells is to eliminate them using chemotherapy drugs combined with immune checkpoint inhibitors. However, the dead Treg cells still exert immunosuppressive effects via the nucleoside adenosine pathway. To improve immunosuppression, we designed a nanosystem to deliver synthetic chemotherapeutics and immune activators. The homemade curcumin analog (CA) was encapsulated by α-lactalbumin (α-LA), and the Treg cell specific antibody (mAb), as a therapeutic agent, was linked to the drug-loaded protein via matrix metalloproteinase-responded peptide (P). After the cleavage peptide responded to matrix metalloproteinase (MMP-2), the CA@α-LA-P-mAb nanoparticles were separated into CA@α-LA and antibody, which can specifically enter cancer cells and Treg cells via membrane fusion and Nrp-1 receptors, respectively. Finally, we found that CA can not only lead to cell death by the chondriosome apoptosis approach but also reduce the production of Treg cells by inhibiting the expression of foxp3 (a key transcription factor of Treg cells). In addition, specific antibodies can improve the immunosuppression of existing Treg cells. The combined effect of CA and antibodies amplifies the role of chemotherapy in metastatic breast cancer.

中文翻译:


基于“多米诺效应”的化疗与免疫疗法相结合,增强了抗转移治疗的功效。



在肿瘤免疫治疗中,Treg细胞是免疫抑制细胞。一般来说,Treg细胞化疗免疫治疗的主要策略是使用化疗药物联合免疫检查点抑制剂来消除它们。然而,死亡的Treg细胞仍然通过核苷腺苷途径发挥免疫抑制作用。为了改善免疫抑制,我们设计了一种纳米系统来提供合成化疗药物和免疫激活剂。自制姜黄素类似物(CA)被α-乳白蛋白(α-LA)包裹,Treg细胞特异性抗体(mAb)作为治疗剂,通过基质金属蛋白酶反应肽(P)与载药蛋白连接。 )。裂解肽响应基质金属蛋白酶(MMP-2)后,CA@α-LA-P-mAb纳米颗粒分离为CA@α-LA和抗体,通过膜融合和Nrp特异性进入癌细胞和Treg细胞分别为-1个受体。最后,我们发现CA不仅可以通过线粒体凋亡途径导致细胞死亡,还可以通过抑制foxp3(Treg细胞的关键转录因子)的表达来减少Treg细胞的产生。此外,特异性抗体可以改善现有Treg细胞的免疫抑制作用。 CA 和抗体的联合作用增强了化疗在转移性乳腺癌中的作用。
更新日期:2020-10-14
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