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Related Concept Videos

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...
Functions of the Lymphatic and Immune System01:28

Functions of the Lymphatic and Immune System

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...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Primary Lymphoid Organs01:16

Primary Lymphoid Organs

Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
Introduction to Lymphatic and Immune System01:23

Introduction to Lymphatic and Immune System

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 born...

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Digestion of the Murine Liver for a Flow Cytometric Analysis of Lymphatic Endothelial Cells
08:07

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Published on: January 7, 2019

Tolerance and lymphoid organ structure and function.

Bryna E Burrell1, Yaozhong Ding, Yumi Nakayama

  • 1Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine Baltimore, MD, USA.

Frontiers in Immunology
|May 9, 2012
PubMed
Summary
This summary is machine-generated.

Understanding immune tolerance requires studying cell migration and anatomical structures, not just molecular interactions. This research highlights anatomical barriers to immune tolerance, emphasizing cell trafficking and spatial positioning for therapeutic development.

Keywords:
lymph nodestructuretolerance

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Area of Science:

  • Immunology
  • Transplantation Immunology
  • Cellular Immunology

Background:

  • Immune tolerance is crucial for successful allograft acceptance.
  • Current understanding of immune tolerance often overlooks anatomical and spatial factors.
  • Cellular migration and trafficking play a significant role in immune responses.

Purpose of the Study:

  • To explore barriers to immune tolerance from cellular, molecular, and process perspectives.
  • To emphasize the importance of anatomical structure and cell migration in determining allograft outcomes.
  • To highlight the limitations of current research methods in studying immune tolerance in vivo.

Main Methods:

  • Focus on the migration of immune cells and the signals governing their traffic.
  • Analysis of anatomical structures, microanatomic domains, and cellular/molecular encounters during lymphocyte transit.
  • Discussion of advanced imaging techniques (confocal, two-photon) and genetic/pharmacological tools.

Main Results:

  • Lymphocyte trafficking through various anatomical sites significantly influences tolerance achievement.
  • Understanding tolerance requires integrated, spatiotemporal analysis rather than isolated molecular studies.
  • Current methods struggle to precisely manipulate and track immune cells within lymphoid organs.

Conclusions:

  • Anatomical structure and cell positioning are fundamental principles controlling immune tolerance.
  • Overcoming barriers to tolerance necessitates a shift towards integrated, anatomically informed research.
  • Developing effective therapeutic strategies requires accounting for the spatial dynamics of the immune system.