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相关概念视频

Inflammatory Response01:28

Inflammatory Response

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Extracellular Matrix01:26

Extracellular Matrix

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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

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The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
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Role of Matrix Metalloproteases in Degradation of ECM01:23

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Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
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In Vivo Imaging Uncovers the Migratory Behavior of Leukocytes within the Joints
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突基质循环控制免疫细胞在炎症解决中的空间模式.

Jean-Baptiste Richard1, Anna Hoyle1, Molly Bower1

  • 1Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK.

Molecular systems biology
|September 22, 2025
PubMed
概括

纤维细胞和骨髓细胞的矩阵重塑影响了类风湿性关节炎 (RA) 中免疫细胞的进入. 原VI的积累限制了免疫细胞的透,而其被单细胞降解则扩大了RA的炎症.

关键词:
细胞外矩阵 细胞外矩阵免疫解决方案 免疫解决方案免疫媒介疾病 免疫媒介疾病多个omics的多个omics.类风湿性关节炎 类风湿性关节炎 类风湿性关节炎

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科学领域:

  • 免疫学 免疫学 免疫学
  • 类风湿病学 类风湿病学
  • 细胞外矩阵生物学 细胞外矩阵生物学

背景情况:

  • 免疫媒介性炎症性疾病,包括类风湿性关节炎 (RA),表现出治疗结果不佳,缺乏治疗选择.
  • 树皮区和细胞外基质 (ECM) 组成的调节失调与疾病的发病有关.
  • 了解这些矩阵扰动对于开发新的治疗策略至关重要.

研究的目的:

  • 通过使用多omics方法来描述RA中的疾病活动特异性矩阵扰动.
  • 确定纤维细胞和髓状细胞在ECM组成和RA突内的免疫细胞贩运中的作用.
  • 阐明VI原对免疫细胞透和疾病活动的功能影响.

主要方法:

  • 开发一个整合转录组,蛋白组和降解组分析的分析管道.
  • 纤维细胞和骨髓细胞对ECM组成的贡献的表征.
  • 空间分析和体外迁移测试以评估原VI功能.
  • 鉴定VI原片段及其与疾病状态的关联.

主要成果:

  • 纤维细胞子集根据矩阵表达形状定义了不同的亚突触.
  • 转录失调和原VI蛋白积累与RA活性和缓解有关,分别.
  • 原VI抑制了免疫细胞的进入,创造了"COL6黑暗"区域.
  • 在这些区域的前端的单细胞降解原VI,扩大免疫允许的,并释放与RA相关的碎片.

结论:

  • 结构细胞的动态矩阵重塑关键地控制了RA中的免疫细胞移民.
  • 原VI通过调节免疫细胞透作用,作为组织水平疾病活动的关键调节剂.
  • 准矩阵重塑途径为RA提供了潜在的治疗途径.