纳米辅助剂介导的EV衍生的人工APC可触发对病毒感染的保护性免疫力
Xingwei Pan1,2, Yicong Lv1,2, Zitong Zheng1
1Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|August 13, 2025
概括
这项研究引入了使用细胞外囊泡绕过抗原处理的纳米抗原呈现细胞 (纳米APC),增强了疫苗诱导的免疫力并改善了对病毒感染的生存率.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 纳米技术 纳米技术
- 免疫学 免疫学 免疫学
背景情况:
- 抗原呈现对于疫苗有效性至关重要,涉及抗原处理和T细胞呈现.
- 目前的疫苗依赖宿主抗原呈现细胞 (APC) 进行处理,这可能是一个瓶.
- 开发绕过或增强这种处理的方法对于改善疫苗设计至关重要.
研究的目的:
- 设计和提出一个纳米-APC绕过抗原处理步骤的APCs in vivo.
- 直接引起抗原特异性细胞免疫力,以防止致命的病毒感染.
- 开发一种基于细胞外囊泡 (EV) 的多功能疫苗平台.
主要方法:
- 用抗原载入的自辅助素纳米颗粒 (nChi) 用于激活原始APC.
- 细胞外囊泡 (EV) 由装备了抗原呈现部分的激活APC产生的.
- 这些被称为纳米APC的EV的特点是它们能够刺激T细胞.
主要成果:
- nChi增强了抗原吸收,刺激了因子,并促进了EV的产生.
- 生成的EV (纳米APC) 在体外有效地刺激了T细胞的增殖.
- 纳米APC疫苗在体内诱导了快速,持久的幽默和细胞免疫力.
- 在流感病毒挑战模型中,纳米APC疫苗接种显著改善了小鼠的生存率.
结论:
- 通过nChi促进的EV可以直接向T细胞呈现抗原,绕过传统的处理.
- 纳米APC代表了开发有效,安全和多功能疫苗的有希望的战略.
- 这种基于电动汽车的平台具有对抗病毒感染和其他疾病的潜力.
更多相关视频
相关概念视频
Vaccinations
45.3K
Overview
45.3K
Immune Response Against Viral Pathogens
917
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...
917
Antigen Presenting Cells
2.1K
The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
2.1K
Antigens Involved in Adaptive Immunity
669
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
669
Cancer Vaccines
509
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...
509


