Related Experiment Video
Updated: Jun 18, 2026
05:59
Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice
Published on: May 14, 2020
Topics of physiological and pathophysiological functions of lymphatics
1Department of Physiology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
Current Molecular Medicine
|November 21, 2009
Summary
This study explores the physiological roles of lymphatic contractions in lymph transport and formation. It also investigates lymphatic vessel permeability, albumin enrichment, and its impact on immunity and lymphedema treatment.
Area of Science:
- Physiology
- Immunology
- Oncology
Background:
- Collecting lymphatics exhibit rhythmical spontaneous contractions crucial for lymph transport and formation.
- Lymphatic vessel permeability and albumin enrichment are vital for innate immunity.
- Secondary lymphedema arises from lymph node removal, necessitating effective treatment strategies.
Purpose of the Study:
- To review the physiological significance of lymphatic contractions and lymph formation regulation.
- To experimentally evaluate lymphatic vessel permeability and discuss its role in innate immunity.
- To describe recanalization mechanisms for treating secondary lymphedema and explore tumor cell roles in lymph node metastasis.
Main Methods:
- Review of physiological significance of lymphatic contractions.
- Experimental evaluation of lymphatic wall effective permeability using isolated cannulated rat lymphatics and microscopy.
- Discussion of recanalization and tumor cell-mediated micro-metastasis.
Main Results:
- Lymphatic contractions regulate lymph transport and formation by altering pacemaker sites and contractile patterns.
- Albumin enrichment in lymph via small lymphatic walls is significant for innate immunity.
- Recanalization offers a potential treatment for secondary lymphedema post-lymph node excision.
Conclusions:
- Rhythmical lymphatic contractions are key to lymph transport and formation.
- Lymphatic permeability and albumin transport are critical for immune regulation.
- Understanding lymphatic function aids in lymphedema treatment and metastasis research.
Related Concept Videos
01:28Functions 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...
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...
01:16Lymphatic 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.
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular spaces.
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular spaces.
01:23Introduction 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...
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are born...
01:20Fluid Connective Tissues: Blood and Lymph
Blood and lymph are fluid connective tissues. They contain cells, also known as formed elements, circulating in a liquid extracellular matrix, the plasma. The formed elements are derived from hematopoietic stem cells in the bone marrow. Blood and lymph connect all vital parts and carry nutrients, oxygen, and other essential molecules like antibodies.
Blood
The blood flows through blood vessels— arteries, capillaries, and veins. Blood plasma is primarily made of proteins, solutes, and water.
Blood
The blood flows through blood vessels— arteries, capillaries, and veins. Blood plasma is primarily made of proteins, solutes, and water.
01:23Detailed 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...
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...
01:18Lymphoid 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...
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...