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Related Concept Videos

Detailed Structure and Function of Lymph Nodes01:23

Detailed Structure and Function of Lymph Nodes

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...
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Secondary Lymphoid Organs

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Lymphatic Vessels and Lymph Transport

Lymphatic vessels, known as lymphatics, are crucial in transporting lymph from peripheral tissues to our venous system. This process begins with lymph entering through tiny capillaries that branch through tissues. These capillaries have unique features such as larger diameters, thinner walls, and a distinctive one-way valve system formed by overlapping endothelial cells.
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Functions of the Lymphatic and Immune System01:28

Functions of the Lymphatic and Immune System

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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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Related Experiment Video

Updated: Jul 20, 2026

Draining Lymph Node Metastasis Model for Assessing the Dynamics of Antigen-Specific CD8+ T Cells During Tumorigenesis
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Published on: January 26, 2024

The tumor-draining lymph node as an immune-privileged site.

David H Munn1, Andrew L Mellor

  • 1Immunotherapy Center, Department of Pediatrics, Medical College of Georgia, Augusta, GA 30912, USA. dmunn@mcg.edu

Immunological Reviews
|September 16, 2006
PubMed
Summary

Tumor-draining lymph nodes (TDLNs) create immune tolerance by modifying antigen presentation and increasing regulatory T cells (Tregs). Interrupting these tolerizing mechanisms in TDLNs is crucial for successful anti-tumor immunotherapy.

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Area of Science:

  • Immunology
  • Oncology
  • Cancer Research

Background:

  • Tumor-draining lymph nodes (TDLNs) are critical sites of immune interaction influenced by primary tumors.
  • The tumor microenvironment in TDLNs promotes immune evasion and tolerance rather than an anti-tumor response.

Purpose of the Study:

  • To elucidate the mechanisms by which TDLNs induce immune tolerance.
  • To highlight the role of TDLNs in hindering effective anti-tumor immunity.

Main Methods:

  • Analysis of antigen-presenting cell function in TDLNs.
  • Quantification and functional assessment of regulatory T cells (Tregs) within TDLNs.
  • Investigation of Treg generation and activation in the context of tumor antigens.

Main Results:

  • TDLNs exhibit altered antigen-presenting cells that cross-present tumor antigens in a tolerizing manner.
  • Increased numbers and enhanced suppressor activity of regulatory T cells (Tregs) are observed in TDLNs.
  • TDLNs promote de novo Treg generation against tumor antigens and preferential activation of self-antigen Tregs, establishing systemic tolerance.

Conclusions:

  • TDLNs act as a site for the active induction of systemic immune tolerance, analogous to immune privilege.
  • The tolerizing environment within TDLNs suppresses effective anti-tumor immune responses.
  • Targeting TDLN-mediated tolerance mechanisms is essential for the efficacy of cancer immunotherapies.