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Stem Cell Niche

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...

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Engineering Hydrogel Microenvironments to Recapitulate the Stem Cell Niche.

Christopher M Madl¹, Sarah C Heilshorn²

¹Department of Bioengineering, Stanford University, Stanford, California 94305, USA.

Annual Review of Biomedical Engineering

|December 9, 2017

Summary

This summary is machine-generated.

Hydrogel platforms mimic the stem cell niche to control stem cell behavior. These biomaterials offer promising strategies for regenerative medicine, disease modeling, and toxicology screening applications.

Keywords:

cell-adhesive ligands cell–cell interactions engineered cellular microenvironments hydrogel matrix mechanics stem cell niche

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Area of Science:

Biomaterials Science
Stem Cell Biology
Tissue Engineering

Background:

Stem cells are crucial for regenerative medicine, disease modeling, and toxicology.
Controlling stem cell behavior (expansion, differentiation) is challenging.
The native stem cell niche influences stem cell fate.

Purpose of the Study:

To review hydrogel platforms for regulating stem cell fate.
To explore microenvironmental parameters influencing stemness and differentiation.
To discuss future hydrogel designs for stem cell applications.

Main Methods:

Surveying techniques for modulating hydrogel properties.
Reviewing the effects of microenvironmental parameters (mechanics, degradability, ligands, microstructure, cell-cell interactions) on stem cells.
Analyzing various stem cell types and their responses.

Main Results:

Hydrogel platforms can effectively control stem cell fate by mimicking the niche.
Microenvironmental parameters significantly impact stem cell stemness and differentiation.
Tailored hydrogels show potential for diverse stem cell applications.

Conclusions:

Hydrogels are versatile tools for stem cell research and applications.
Future hydrogel designs will range from simple materials for expansion to complex systems for organotypic culture.
This approach advances regenerative medicine, disease modeling, and toxicology screening.