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Related Concept Videos

Immune Surveillance by NK Cells and Phagocytes01:25

Immune Surveillance by NK Cells and Phagocytes

Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
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...
Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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...
Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview

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Related Experiment Video

Updated: May 23, 2026

Bone Marrow-derived Macrophage Production
07:06

Bone Marrow-derived Macrophage Production

Published on: November 22, 2013

Lymph node macrophages.

Elizabeth E Gray1, Jason G Cyster

  • 1Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California San Francisco, San Francisco, CA 94143-0414, USA.

Journal of Innate Immunity
|April 11, 2012
PubMed
Summary
This summary is machine-generated.

Lymph node macrophages are classified into three subsets based on location, playing key roles in immune responses. Understanding these specialized cells is crucial for immunity and antiviral defense.

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Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation
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Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation

Published on: April 29, 2015

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Last Updated: May 23, 2026

Bone Marrow-derived Macrophage Production
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Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation
08:21

Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation

Published on: April 29, 2015

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Lymph node (LN) macrophages efficiently capture lymph-borne antigens.
  • Recent research reveals specialized functions including antigen presentation, cytokine production, and viral permissiveness.
  • Traditional classification divides LN macrophages by subcapsular sinus and medullary locations.

Purpose of the Study:

  • To classify lymph node macrophages into three distinct subsets: subcapsular sinus, medullary sinus, and medullary cord macrophages.
  • To review the literature on the roles of these subsets in innate and adaptive immunity.
  • To discuss their developmental requirements, purification challenges, and potential heterogeneity.

Main Methods:

  • Literature review and synthesis of existing research on lymph node macrophages.
  • Classification of macrophages based on anatomical location within the lymph node.
  • Analysis of functional roles in immune responses.

Main Results:

  • Identification and classification of three LN macrophage subsets: subcapsular sinus, medullary sinus, and medullary cord macrophages.
  • Detailed review of their functions in antigen presentation, immune cell interaction, and antiviral responses.
  • Highlighting challenges in macrophage purification and acknowledging further heterogeneity.

Conclusions:

  • Lymph node macrophages exhibit diverse functions critical for immune surveillance and response.
  • A refined classification based on location aids in understanding their specialized roles.
  • Further research is needed to fully elucidate LN macrophage heterogeneity and function.