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Related Concept Videos

Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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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...
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Detailed Structure and Function of Lymph Nodes01:23

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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.
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Introduction to Lymphatic and Immune System01:22

Introduction to Lymphatic and Immune System

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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.
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Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
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Isolation of Murine Lymph Node Stromal Cells
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Lymph node fibroblastic reticular cells steer immune responses.

Lushen Li1, Jing Wu1, Reza Abdi2

  • 1Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.

Trends in Immunology
|July 14, 2021
PubMed
Summary

Fibroblastic reticular cells (FRCs) organize lymph nodes (LNs) and guide immune responses. Understanding FRC heterogeneity and function offers new therapeutic strategies for immune diseases and tolerance.

Keywords:
fibroblastic reticular cellsimmunitylymph nodestolerance

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Area of Science:

  • Immunology
  • Cell Biology
  • Anatomy

Background:

  • Lymph nodes (LNs) are critical sites for initiating immune responses.
  • Fibroblastic reticular cells (FRCs) are key structural and functional components of LNs.
  • FRCs influence immune cell recruitment, crosstalk, and antigen presentation, shaping immune outcomes.

Purpose of the Study:

  • To summarize current knowledge on the anatomical, phenotypic, and functional diversity of FRC subsets.
  • To explore the remodeling of FRCs during inflammation at topological and transcriptional levels.
  • To highlight FRC-based therapeutic strategies for immune homeostasis, protection, tolerance, and disease treatment.

Main Methods:

  • Review of recent high-resolution transcriptional and histological analyses.
  • Integration of data on FRC heterogeneity and function in LNs.
  • Synthesis of information on FRC-immune cell interactions.

Main Results:

  • Detailed overview of distinct FRC subsets and their characteristics.
  • Insights into how FRCs change structurally and genetically during inflammation.
  • Elucidation of the complex crosstalk between FRCs and various immune cells.

Conclusions:

  • FRCs play multifaceted roles in regulating immunity and tolerance.
  • Targeting FRCs presents promising therapeutic avenues for a range of immune-related conditions.
  • Further research into FRC subsets and their interactions can advance immunomodulatory therapies.