细菌外膜囊泡覆盖的免疫刺激纳米平台重振T细胞功能并重编程瘤免疫力
Yu-Han Lin1,2,3, Chia-Wei Chen2, Mei-Yi Chen3
1Taiwan International Graduate Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei 11529, Taiwan.
ACS nano
|May 20, 2025
概括
这项研究介绍了一种新的纳米治疗平台,使用细菌外膜囊泡 (OMV) 和CpG-ODN来重新编程瘤微环境. 这种方法有效地激活抗瘤免疫力,导致显著的瘤回归与低毒性.
科学领域:
- 纳米医学是一种纳米医学.
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
背景情况:
- 细菌外膜囊泡 (OMVs) 是强大的纳米载体,用于药物输送和免疫刺激.
- 瘤微环境 (TME) 通常会抑制抗瘤免疫反应.
- 开发有效的癌症免疫疗法需要策略来重编程TME并激活免疫细胞.
研究的目的:
- 研究一种用于癌症免疫治疗的新型纳米治疗平台 (CpG@MSN-PEG/PEI@OMVs).
- 评估这个平台重新编程TME并增强抗瘤免疫力的能力.
- 在临床前癌症模型中评估纳米混合体的疗效和安全性.
主要方法:
- 构造带有酸-酸-酸寡氧核酸 (CpG-ODN) 装载并被OMV覆盖的半孔性二氧化纳米粒子 (MSN).
- 在4T1乳腺癌和MC38结肠直肠癌模型中,对CpG@MSN-PEG/PEI@OMVs进行全身注射.
- 分析细胞因子 (IFNγ,TGF-β),免疫细胞群 (巨细胞,树突细胞),T细胞代谢和瘤生长.
- 在瘤排水淋巴结中的T细胞的转录组分析.
主要成果:
- CpG@MSN-PEG/PEI@OMVs证明了精确的瘤向和诱导抗瘤细胞因子 (IFNγ),同时抑制免疫抑制细胞因子 (TGF-β).
- 这些纳米混合体促进了M1巨细胞的两极化,树突细胞的成熟,以及持久的瘤特异性免疫记忆.
- 在转移性和固体瘤模型中观察到显著的瘤回归,系统毒性最小.
- 在T细胞中发现了增强的线粒体氧化酸化,减轻了T细胞疲劳.
结论:
- CpG@MSN-PEG/PEI@OMVs代表了癌症免疫治疗的一个有前途的纳米平台.
- 该平台有效地重新编程TME并调节先天和适应性免疫力.
- 这种方法有可能用于治疗各种癌症类型,包括转移性和固体瘤.
更多相关视频
相关概念视频
Tumor Immunotherapy
454
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
454
Cytotoxic T Cells-mediated Immune Response
821
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
821
Cancer Vaccines
313
Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
313
The Tumor Microenvironment
6.5K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.5K
T Cell Activation and Clonal Selection
620
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
620
Cell-mediated Immune Responses
66.6K
Overview
66.6K


