Related Experiment Video
Updated: Jul 10, 2026
06:12
Modeling the Endothelial Glycocalyx Post-Pneumonectomy in a 3D Fluidic Chip - An Approach to Fabricating a Vascular-based Organ-on-Chip System
Published on: September 16, 2025
Glycosaminoglycans and Their Role in Capillary Walls
Lorna K Milne1,2, Kenton P Arkill3,4
1Nottingham GlycoAnalytics Hub, Biodiscovery Institute, University of Nottingham, Nottingham, UK.
Advances in Experimental Medicine and Biology
|July 8, 2026
Summary
Glycosaminoglycans (GAGs) are crucial for capillary function, controlling permeability and more. Analyzing their spatial distribution in capillaries presents challenges but is key to understanding their roles.
Area of Science:
- Biochemistry
- Cell Biology
- Physiology
Background:
- Glycosaminoglycans (GAGs) are vital polysaccharide chains in capillary walls.
- GAGs regulate vascular permeability, shear stress detection, and growth factor uptake.
- The spatial distribution of GAGs is critical for their diverse functions.
Purpose of the Study:
- To review the role of GAGs in capillary permeability, using the glomerular filtration barrier as a model.
- To discuss current and potential methods for in situ imaging and analysis of GAGs at the capillary scale.
Main Methods:
- Review of existing literature on GAGs and capillary function.
- Discussion of imaging techniques for capillary-scale analysis.
- Exploration of methods for analyzing GAG spatial distribution.
Main Results:
- GAGs play a significant role in regulating capillary permeability.
- The glomerular filtration barrier serves as a key example for studying GAG function.
- Challenges exist in analyzing GAG spatial distribution and synthesis.
Conclusions:
- Understanding GAG distribution is essential for elucidating their functional roles in capillaries.
- Advanced imaging and analytical methods are needed for in situ capillary scale analysis.
- Further research is required to fully understand GAGs' contribution to vascular physiology.
Related Concept Videos
01:23Glycosaminoglycans
Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
01:05Proteoglycans
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
01:21Matrix Proteoglycans and Glycoproteins
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
01:14Glycocalyx and its Functions
The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.
Components of...
Components of...
01:42The Extracellular Matrix
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
01:29The Extracellular Matrix
Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...