相关实验视频

Updated: Jul 6, 2025

Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes

Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes

Published on: June 22, 2016

脂蛋白是细菌菌种对树突细胞成熟和激活的关键免疫刺激成分

Sungho Jeong¹, Jintaek Im¹, Dongwook Lee¹

¹Department of Oral Microbiology and Immunology, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea.

Molecular immunology

|December 31, 2023

概括

来自Bacillus cereus和Bacillus subtilis的脂蛋白 (LPP) 是树突细胞 (DC) 激活的主要触发因素. 这些细菌的关键结构成分驱动DC成熟和免疫反应.

科学领域:

免疫学免疫学免疫学
微生物学微生物学
细胞生物学细胞生物学

背景情况:

树突细胞 (DCs) 对于对抗微生物入侵者的免疫反应至关重要.
细菌物种,包括致病性B. cereus和开始性B. subtilis,与DCs相互作用.
细菌物种对DC激活负责的特定细菌成分仍然不清楚.

研究的目的:

识别Bacillus cereus和Bacillus subtilis激活树突细胞的关键结构组成部分.
为了比较来自这些细菌的不同微生物相关分子模式 (MAMPs) 对DCs的免疫调节效应.

主要方法:

微生物关联分子模式 (MAMP) 的净化:来自B. cereus和B. subtilis的脂质蛋白酸 (LTA),脂质蛋白 (LPP) 和糖素 (PGN).
在使用MAMP刺激时评估DC激活和成熟标志物 (例如CCR7,CD40,CD80,CD83,CD86,CD205,MHC-I,MHC-II).
在MAMP暴露后测量DC内细胞容量和细胞因子 (TNF-α,IL-6) 生产.

主要成果:

来自B. cereus和B. subtilis的细菌脂蛋白 (LPP) 最强烈地诱导了DC成熟和激活.
펩티도글리칸 (PGN) 适度刺激了DCs,而脂铁醇酸 (LTA) 的作用最小.
LPP增强了DC成熟标记物,降低了内细胞容量,并促进了中度TNF-α和IL-6的产生;MAMP的组合没有显示任何协同效应.

结论:

脂蛋白 (LPP) 被确定为驱动树突细胞激活的主要结构成分,由Bacillus cereus和Bacillus subtilis两种细胞激活.
了解这些分子相互作用对于开发针对Bacillus相关感染的策略和利用共生Bacillus进行免疫调节至关重要.

关键词:

细菌花的花类植物.这种细菌是 Bacillus subtilis.树突性细胞树突性细胞脂蛋白质是一种脂蛋白质.

更多相关视频

Preparation of Tumor Antigen-loaded Mature Dendritic Cells for Immunotherapy

Preparation of Tumor Antigen-loaded Mature Dendritic Cells for Immunotherapy

Published on: August 1, 2013

Immunostimulatory Agent Evaluation: Lymphoid Tissue Extraction and Injection Route-Dependent Dendritic Cell Activation

Immunostimulatory Agent Evaluation: Lymphoid Tissue Extraction and Injection Route-Dependent Dendritic Cell Activation

Published on: September 16, 2018

相关概念视频

B Cell Activation and Differentiation

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...

Defense Against Bacterial Pathogens

Defense Against Bacterial Pathogens

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...