相关实验视频
Updated: Nov 15, 2025

05:47
Isolation of Murine Lymph Node Stromal Cells
Published on: August 19, 2014
31.8K
淋巴结中的单细胞衍生S1P调节免疫反应
Audrey Baeyens1, Sabrina Bracero1,2, Venkata S Chaluvadi1,3
1Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, New York, NY, USA.
Nature
|March 4, 2021
概括
在免疫反应期间,由炎症单细胞驱动的sphingosine 1- phosphate (S1P) 水平在淋巴结中升高. 这种增加会延长T细胞的存在,从而加剧自身免疫性疾病的严重程度.
科学领域:
- 免疫学
- 细胞生物学
- 生物化学
背景情况:
- 斯芬-1-酸盐 (S1P) 是一种脂质化学吸引剂,引导细胞从组织迁移到循环中.
- S1P梯度,特别是那些涉及S1P受体1的,直接从淋巴结进入血液.
- 关于S1P在疾病中的分布及其对免疫反应的影响存在知识差距.
研究的目的:
- 在免疫反应期间研究淋巴结中的S1P度动态.
- 在炎症期间识别淋巴结中的S1P来源.
- 阐明CD69和S1P受体5 (S1pr5) 在免疫细胞S1P调节中的作用.
- 确定高S1P对T细胞停留时间和自身免疫性疾病严重性的影响.
主要方法:
- 在免疫反应期间测量淋巴结中的S1P度.
- 血液细胞,包括炎症单细胞的S1P产生分析.
- 评估CD69表达及其与S1pr5水平的相关性.
- 研究S1P水平对T细胞在淋巴结中的停留时间的影响.
- 在小鼠模型中评估自身免疫脑炎的严重程度.
主要成果:
- 在免疫反应期间,淋巴结中的S1P度显著增加.
- 在这种情况下,炎症单细胞,而不是内皮细胞被确定为S1P的主要来源.
- 炎症单细胞上的CD69表达与S1pr5水平的降低有关,作为"立足"信号.
- 增加的S1P水平延长了T细胞在淋巴结中的停留时间.
- 在小鼠中,S1P的增加加剧了自身免疫脑炎的严重程度.
结论:
- 免疫反应改变淋巴结内的S1P梯度,炎症单细胞作为关键生产者.
- CD69在调节S1P信号和免疫细胞在炎症部位的保留中发挥着关键作用.
- 由于S1P升高,T细胞在淋巴结中的长期存在可能会影响T细胞分化和疾病发病.
- 针对S1P信号提供了对自身免疫疾病的潜在治疗策略.
相关概念视频
Secondary Lymphoid Organs
8.1K
Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
8.1K
Functions of the Lymphatic and Immune System
5.2K
The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
5.2K
Detailed Structure and Function of Lymph Nodes
3.5K
Lymph nodes are bean-shaped structures that cluster along the lymphatic vessels in the inguinal, axillary, and cervical regions. Each node is divided into compartments by a capsule that extends trabeculae inward.
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
3.5K
Lymphoid Cells and Tissues
2.2K
Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
2.2K
Introduction to Lymphatic and Immune System
15.2K
Immunity is a crucial biological concept about our body's inherent capacity to prevent infections and diseases. A complex network of cells and tissues collectively known as the immune system facilitates this natural defense mechanism. The immune system plays an integral role in maintaining our health and well-being, shielding us from potential health threats.
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are...
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are...
15.2K
Differentiation of Common Myeloid Progenitor Cells
3.6K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.6K

