免疫力 对DAR-901和BCG诱导的Mycobacterium avium进行免疫
Getahun Abate1, Krystal A Meza1, Chase G Colbert1
1Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University, St. Louis, MO 63104, USA.
Vaccines
|June 27, 2025
概括
像DAR-901和BCG这样的新疫苗在对抗肺部Mycobacterium avium复合体 (MAC) 感染方面表现有前途. 粘膜BCG疫苗接种提供了对MAC的最佳保护,而TetRBCG可能会提高安全性.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 传染性疾病 传染性疾病
背景情况:
- 肺非结核菌 (NTM),主要是Mycobacterium avium复合体 (MAC),在欧洲和北美的流行率不断增加.
- 肺性MAC的治疗结果不够理想,失败率为30-40%,突显了新型疫苗的需要.
研究的目的:
- 评估两个全细胞疫苗DAR-901和BCG在诱导对MAC的交叉反应性免疫力方面的有效性.
- 在小鼠模型中评估这些疫苗对气溶MAC感染的保护能力.
- 为了研究修改后的BCG疫苗 (tetRBCG) 粘膜注射的安全性概况.
主要方法:
- 用DAR-901或BCG (皮内,皮下或鼻内) 免疫BALB/c小鼠.
- IFN-γ ELISPOT测定用于测量交叉反应性免疫力.
- 使用MAC的气溶挑战,然后量化肺殖民地形成单位 (CFU),组织病理学和流细胞计分析.
- 在易患囊性纤维化小鼠中测试了tetRBCG,并评估了多西环素对BCG CFU的影响.
主要成果:
- 无论是DAR-901还是BCG都诱导了显著的MAC交叉反应免疫力,并对气溶MAC挑战进行了保护.
- 与全身BCG和DAR-901相比,粘膜BCG疫苗的保护性更强.
- 接种BCG疫苗并没有妨碍克拉里思罗米辛的疗效,而多西环素治疗的四次接种BCG减少了肺部BCG CFU,而不损害MAC免疫力.
结论:
- DAR-901和BCG疫苗在产生MAC交叉反应免疫力和保护MAC感染方面是有效的.
- 鼻腔BCG接种疫苗提供了最强大的防护肺部MAC挑战.
- 泰特RBCG代表了粘膜BCG疫苗接种策略的潜在更安全的替代方案.
更多相关视频
08:10A Functional Whole Blood Assay to Measure Viability of Mycobacteria, using Reporter-Gene Tagged BCG or M.Tb BCG lux/M.Tb lux
Published on: September 14, 2011
13.9K
10:11Expression of Exogenous Antigens in the Mycobacterium bovis BCG Vaccine via Non-genetic Surface Decoration with the Avidin-biotin System
Published on: January 31, 2018
9.5K
相关概念视频
01:31Defense Against Bacterial Pathogens
1.5K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.5K
01:51Vaccinations
45.3K
Overview
45.3K
01:23Immunological Memory
5.9K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
5.9K