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Related Concept Videos

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...
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...
Development of the Lymphatic System01:15

Development of the Lymphatic System

The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
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...
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...
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...

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Murine Corneal Transplantation: A Model to Study the Most Common Form of Solid Organ Transplantation
09:03

Murine Corneal Transplantation: A Model to Study the Most Common Form of Solid Organ Transplantation

Published on: November 17, 2014

Corneal lymphangiogenesis: implications in immunity.

Sangita P Patel1, Reza Dana

  • 1Cornea and Refractive Surgery Services, Massachusetts Eye and Ear Infirmary, Harvard Medical School, 243 Charles St., Boston, MA 02114, USA. sangita-patel@meei.harvard.edu

Seminars in Ophthalmology
|May 14, 2009
PubMed
Summary
This summary is machine-generated.

The cornea

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Area of Science:

  • The lymphatic system's role in immune privilege and transplantation.
  • Corneal lymphangiogenesis and hemangiogenesis.

Background:

  • The lymphatic system returns fluid to circulation and aids immune responses.
  • The cornea is normally avascular, maintaining immune privilege.
  • Lymphatic vessel studies were limited by marker discovery.

Purpose of the Study:

  • To review lymphatic system basics, structure, function, and development.
  • To emphasize lymphatics in the cornea concerning angiogenesis and transplant rejection.
  • To summarize current understanding of hemangiogenesis and lymphangiogenesis in corneal transplants.

Main Methods:

  • Review of existing literature on lymphatic system and corneal neovascularization.
  • Analysis of studies utilizing new lymphatic-specific markers.
  • Synthesis of research on immune privilege, angiogenesis, and transplant rejection.

Main Results:

  • The lymphatic system has dual roles: fluid drainage and antigen presentation.
  • Corneal lymphangiogenesis and hemangiogenesis correlate with loss of immune privilege.
  • New lymphatic and blood vessel growth in the cornea is linked to transplant rejection.

Conclusions:

  • Understanding corneal lymphatics is crucial for transplant success.
  • Parallel hemangiogenesis and lymphangiogenesis impact corneal immune privilege.
  • Further research on these processes may improve transplant outcomes.