用干扰素-γ和瘤抗原改造的转基因细菌囊泡通过调节树突细胞来重塑抗瘤细胞免疫力
Yuting Fu1, Biao Duan2, Peng Zheng1
1Laboratory of Molecular Immunology, Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.
Biomaterials
|July 5, 2025
概括
工程化细菌仿生囊泡 (BBVs) 提供干扰素- (IFN-γ) 和Toll-like受体 (TLR) 配体,以增强树突细胞成熟,从而产生强大的抗瘤免疫力. 这种新的瘤疫苗策略克服了免疫抑制,并抑制了瘤生长和转移.
科学领域:
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
- 在瘤学瘤学.
背景情况:
- 瘤疫苗通过激活树突细胞 (DC) 和T细胞反应,显示出癌症免疫疗法的前景.
- 收费类受体 (TLR) 配体和干扰素- (IFN-γ) 对于DC成熟和T细胞激活至关重要,但共同交付仍然是一个挑战.
- 目前用于产生瘤疫苗成熟DCs (mDCs) 的方法在联合提供基本刺激剂方面面临技术限制.
研究的目的:
- 设计修饰的细菌生物模拟囊泡 (BBVs),以便将IFN-γ和TLR连接物共同传递给DCs.
- 开发一种新的瘤疫苗策略,利用BBV来增强对固体瘤的抗瘤免疫力.
- 在临床前模型中评估基于BBV的瘤疫苗的疗效,包括它们与免疫疗法的协同效应.
主要方法:
- 修改后的细菌仿生囊泡 (BBVs) 被设计成在其表面显示IFN-γ和TLR连接体.
- 设计的BBV装载了HPV 16 E7蛋白和三种4T1新抗原的融合.
- 在TC-1和4T1瘤模型中评估了BBV/IFN-γ疫苗刺激DC成熟,T细胞反应 (Th1和CTL) 和抗瘤作用的能力.
- 在4T1瘤携带小鼠中,研究了与抗PD-L1抗体的协同效应.
主要成果:
- 设计的BBV有效地刺激了DC成熟和迁移,促进了CD4+ Th1和CD8+ CTL分化.
- 该BBV/IFN-γ疫苗触发了Th1/CTL极化T细胞反应,增强了T细胞透,并重塑了瘤微环境.
- 在TC-1和4T1瘤模型中观察到显著的瘤生长和转移的抑制.
- 该瘤疫苗在4T1乳腺瘤模型中与抗PD-L1单克隆抗体结合时显示出协同效应.
结论:
- 功能性修改的BBV作为有效的输送系统,可以同时输送IFN-γ和TLR配体,克服当前的技术限制.
- 这种基于BBV的瘤疫苗策略显示出克服瘤免疫抑制并产生强大的抗瘤免疫力的巨大潜力.
- 设计的BBV为开发先进癌症疫苗提供了一个有前途的平台,有可能提高现有免疫疗法的疗效.
相关概念视频
01:27Tumor Immunotherapy
665
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.
665
01:30Cancer Vaccines
517
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...
517
01:29Immune Response Against Viral Pathogens
931
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...
931
01:29Microorganisms in Medicine and Therapeutics
349
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
349