Recent advances in defined hydrogels in organoid research

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Organoids are advanced in vitro models mimicking organ complexity, crucial for biomedical applications.
• Current organoid culture relies on animal-derived extracellular matrices (ECM), like Matrigel, which lack defined composition and reproducibility.
• Limitations of current ECMs hinder consistent organoid development and maturation.

Purpose of the Study:

• To review the properties of native ECM and strategies for designing defined hydrogel matrices for organoid culture.
• To present natural and synthetic defined hydrogels suitable for enhancing organoid formation and maturation.
• To highlight applications of organoids within defined hydrogels and discuss future research directions.

Main Methods:

• Summarized fundamental properties of native extracellular matrices (ECM) in vivo.
• Reviewed critical strategies for designing defined hydrogel matrices.
• Presented natural and synthetic polymer-based hydrogels for organoid applications.
• Highlighted representative applications of organoids cultured in defined hydrogels.

Main Results:

• Defined hydrogels offer precise control over biochemical and biophysical properties, improving organoid development.
• Natural and synthetic hydrogels show significant potential for supporting organoid formation and maturation.
• Incorporating organoids into defined hydrogels enables advanced applications in regenerative medicine and disease modeling.

Conclusions:

• Defined hydrogels represent a significant advancement over undefined animal-derived matrices for organoid culture.
• Further development of defined hydrogels and associated technologies will accelerate organoid research.
• Optimized hydrogel-based organoid systems hold promise for future biomedical and tissue engineering breakthroughs.