多功能HBc病毒样粒子重编程免疫抑制巨细胞,并增强CD8+T细胞反应,以增强癌症免疫疗法
Shuntao Liang1, Xiaoxuan Yin1, Yongjie Chi2,3
1Biomedical Innovation Center, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, People's Republic of China.
International journal of nanomedicine
|October 23, 2025
概括
这项研究引入了一种新型纳米疫苗,该疫苗可以重新编程免疫抑制性瘤相关巨细胞 (TAMs),并阻止B7-H3检查点. 这种方法在临床前模型中增强了抗瘤免疫力和免疫治疗疗效.
科学领域:
- 纳米技术纳米技术
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 与瘤相关的巨细胞 (TAMs) 创造了一个免疫抑制的瘤微环境,限制了免疫疗法的有效性,如免疫检查点封锁.
- 重编程TAM和阻断免疫检查点是增强抗瘤反应的关键策略.
研究的目的:
- 开发一个多功能纳米疫苗平台,能够同时重编程TAM并阻断B7-H3免疫检查点.
- 评估纳米疫苗在重塑瘤微环境和引起强大的抗瘤免疫力的有效性.
主要方法:
- 一种新型纳米疫苗是使用类似乙型肝炎核心病毒的粒子 (HBc VLP) 设计的,该粒子同时显示瘤抗原和TAM向.
- 该纳米疫苗封装了CpG寡核酸,并与抗B7-H3抗体和PEG表面结合,以增强向和循环.
- 在体外和体内研究中,使用细胞共同培养和B16-F10黑色素瘤携带的小鼠进行了实验,以评估TAM重编程,免疫细胞激活和瘤抑制.
主要成果:
- 这种纳米疫苗成功地准了TAM,并将M2类TAM重新编程为M1类表型,从而增加M1/M2比率.
- 共同培养试验表明,在B7-H3封锁时T细胞激活的增强.
- 在体内研究显示,由重编程的M1巨细胞和激活的T细胞驱动的显著瘤抑制 (63.47%没有PEGylation,80.12%具有PEGylation).
结论:
- 基于HBc VLP的纳米疫苗是协调免疫调节的开创性平台,有效地克服了TAM介导的免疫抑制.
- 这种多功能纳米疫苗整合了抗原呈现,TAM重编程和B7-H3检查点阻塞,以获得协同的抗瘤效应.
- 模块化设计有望在固体瘤和个性化免疫治疗中进行临床转化.
相关概念视频
Tumor Immunotherapy
1.7K
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.
1.7K
Immune Response Against Viral Pathogens
1.7K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
1.7K
Cell-mediated Immune Responses
83.4K
Overview
83.4K
Cytotoxic T Cells-mediated Immune Response
6.5K
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...
6.5K
Cancer Vaccines
952
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...
952


