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Glycosaminoglycans

Glycosaminoglycans

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...

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Updated: Nov 11, 2025

Preparation of Chitosan-based Injectable Hydrogels and Its Application in 3D Cell Culture

Preparation of Chitosan-based Injectable Hydrogels and Its Application in 3D Cell Culture

Published on: September 29, 2017

Chitooligosaccharides and their structural-functional effect on hydrogels: A review.

Nishat Tabassum¹, Shoeb Ahmed¹, M Azam Ali²

¹Department of Chemical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh.

Carbohydrate Polymers

|March 26, 2021

Summary

Chitooligosaccharides (COS) offer improved water solubility and biological properties compared to chitosan, enhancing hydrogel performance for regenerative medicine. Tailoring COS properties like degree of polymerization (DP) and deacetylation (DD) optimizes their use in cell-related applications.

Keywords:

Chitooligosaccharide Chitosan oligomer Drug delivery Hydrogel Radiation Tissue engineering

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Last Updated: Nov 11, 2025

Preparation of Chitosan-based Injectable Hydrogels and Its Application in 3D Cell Culture

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Published on: September 29, 2017

Fabrication of Size-Controlled and Emulsion-Free Chitosan-Genipin Microgels for Tissue Engineering Applications

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A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

Published on: January 14, 2020

Area of Science:

Biomaterials Science
Polymer Chemistry
Regenerative Medicine

Background:

Chitosan's poor solubility and high molecular weight (MW) restrict its application in hydrogel scaffolds.
Conversion to chitooligosaccharides (COS) enhances water solubility and biological functionalities.
COS properties, including degree of polymerization (DP) and deacetylation (DD), are tunable for specific biomedical needs.

Purpose of the Study:

To review and compare methods for producing chitooligosaccharides (COS).
To critically discuss the advantages of COS in hydrogel scaffolds for regenerative medicine.
To highlight COS as superior alternatives to chitosan in cell-related applications.

Main Methods:

Review of various COS production methods.
Comparative analysis of preparation techniques.
Discussion of COS properties and their impact on hydrogel performance.

Main Results:

Low MW COS exhibit enhanced absorptive properties, biocompatibility, and cell proliferation in hydrogels.
Tunable DP and DD of COS allow for functional customization.
Simplified COS preparation methods facilitate direct biomedical application.

Conclusions:

Chitooligosaccharides (COS) are advantageous alternatives to chitosan for hydrogel scaffolds in regenerative medicine.
Tailoring COS properties is key to optimizing hydrogel performance for cell-related applications.
Accessible production methods are crucial for the widespread use of COS in biomedical fields.