一种基于VCG的多皮托普克拉米迪亚疫苗,其中包含霍乱毒素A1亚单元 (MECA),可给予保护性免疫力,抵御跨挑战
Fnu Medhavi1, Tayhlor Tanner1, Shakyra Richardson1
1Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA 30310, USA.
Biomedicines
|February 26, 2025
概括
一种基于幽灵 (rVCG) 的新型重组Vibrio cholerae疫苗,包含霍乱毒素A1亚单元 (CTA1) 和Chlamydia trachomatis (CT) 抗原 (MECA),证明了对CT感染的保护. 这种rVCG-MECA疫苗诱导了强大的免疫反应,并且被很好地容忍.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
背景情况:
- 开发有效的针对Chlamydia trachomatis (CT) 的疫苗对于预防生殖器感染至关重要.
- 再组合Vibrio cholerae幽灵 (rVCG) 平台为疫苗输送提供了潜力.
- 霍乱毒素A1亚单元 (CTA1) 可以作为粘膜辅助剂.
研究的目的:
- 评估基于rVCG的新型亚单元疫苗 (rVCG-MECA) 对CT跨挑战的疗效.
- 评估rVCG-MECA疫苗的免疫性和安全性.
- 研究CT疫苗开发的VCG平台上的CTA1的辅助潜力.
主要方法:
- 雌性C57BL/6J小鼠通过肌内 (IM) 或鼻内 (IN) 途径三次免疫接种rVCG-MECA或对照疫苗.
- 通过测量CT特异性抗体 (IgG,IgG2c,IgA) 和IFN-γ来分析免疫反应.
- 在CT跨挑战后评估了保护.
主要成果:
- 该rVCG-MECA疫苗诱导了强大的全身和粘膜 humoral (IgG,IgG2c,IgA) 和 Th1细胞介导 (IFN-γ) 免疫反应.
- 免疫反应在免疫接种后至少持续了16周.
- 接种rVCG-MECA疫苗提供了与活体CT EBs相比较的保护,没有任何不良影响,无论采用哪种方式.
结论:
- 该rVCG-MECA疫苗有望保护CT生殖器感染.
- 通过VCG平台提供的CTA1可以作为CT疫苗的有效粘膜和全身辅助剂.
- 这种多皮托普疫苗策略是开发新型CT疫苗的可行方法.
相关概念视频
Antigen Processing Pathways
886
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...
886
Multi-pass Transmembrane Proteins and β-barrels
5.2K
In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
5.2K
Cross-reactivity
30.9K
Overview
30.9K
Diversity of Antigen Receptors
482
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
482
Transcytosis of IgG
2.7K
Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
2.7K
Antigen Presenting Cells
1.6K
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...
1.6K


