对肠道抗原产生耐受性的PRDM16依赖性抗原呈现细胞
Liuhui Fu1, Rabi Upadhyay1,2, Maria Pokrovskii1,3
1Department of Cell Biology, New York University School of Medicine, New York, NY, USA.
Nature
|April 14, 2025
概括
研究人员发现了一种新的免疫细胞类型,PRDM16+RORγt+耐受性树突细胞 (tolDCs),对口服耐受性至关重要. 这些细胞防止对食物和微生物的炎症反应, 为过敏和自身免疫性疾病提供潜在的治疗点.
科学领域:
- 免疫学
- 胃肠病学
背景情况:
- 胃肠道经常接触食物和微生物抗原, 需要强大的免疫调节.
- 周围诱导的T调节细胞对于控制这些抗原的炎症反应至关重要.
- 虽然已知RORγt+抗原呈现细胞 (APC) 诱导微生物群特定的pTreg细胞,但对食物耐受性负责的APC仍未确定.
研究的目的:
- 确定负责诱导食物和微生物群特异性pTreg细胞的特定APC子组.
- 阐明管理这些APC的发展和功能的分子机制.
- 研究这些APC在建立口服耐受性的作用及其对过敏和自身免疫性疾病的潜在影响.
主要方法:
- 基因表达分析,染色体可访问性测定和表面标记物分析以确定APC特征.
- 在小鼠模型中进行基因干扰研究,以评估APC对免疫反应的功能影响.
- 人体组织 (中枢淋巴结,肠道,桃体) 的单细胞转录组分析,以确定保存的细胞群.
主要成果:
- 鉴定了一种新的APC子集,称为PRDM16+RORγt+耐受性树突细胞 (tolDCs),对于pTreg细胞分化至关重要.
- 证明tolDC开发需要PRDM16和RORγt表达.
- 对tolDCs的干扰导致T助手2细胞增加而不是pTreg细胞,损害了口服耐受性并加剧了过敏模型.
- 在人体组织中识别类似的tolDC种群,表明进化保护.
结论:
- 通过诱导特定于食物和微生物抗原的pTreg细胞,PRDM16+RORγt+tolDCs是口服耐受性的关键调节者.
- tolDCs的功能障碍可能导致食物过敏和喘等炎症.
- 这些发现为治疗自身免疫性和过敏性疾病提供了新的治疗途径,
更多相关视频
09:25Isolation and Characterization of Dendritic Cells and Macrophages from the Mouse Intestine
Published on: May 21, 2012
39.0K
11:34A Simple and Efficient Method for Testing Immunomodulatory Agents for Generation of Tolerogenic Dendritic Cells from Human CD14+ Monocytes
Published on: April 11, 2025
167
相关概念视频
Special Features of Adaptive Immunity
707
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
707
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
Cell-mediated Immune Responses
66.6K
Overview
66.6K
Antigens Involved in Adaptive Immunity
434
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...
434
Renewal of Intestinal Stem Cells
2.5K
The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
2.5K
