Matrix biophysical cues direct mesenchymal stromal cell functions in immunity

Area of Science:

• Biomaterials Science
• Cell Biology
• Immunology

Background:

• Mesenchymal stromal cells (MSCs) are utilized in numerous clinical trials for their immune-modulating properties.
• Biophysical cues within the extracellular matrix are increasingly recognized as critical regulators of cell behavior, particularly for MSCs.
• While the impact of biophysical cues on MSC differentiation is studied, their role in MSC immunomodulation is an emerging area.

Purpose of the Study:

• To review how biophysical cues in microenvironments affect MSCs' ability to regulate immune cells.
• To discuss leveraging biophysical cues for optimizing MSC isolation, priming, and delivery for improved immunomodulatory therapy.
• To explore the potential of incorporating biophysical cues into MSC potency assays for predicting clinical outcomes.

Main Methods:

• Review of existing literature on hydrogel design, biomaterial properties, and MSC immunomodulation.
• Analysis of how matrix characteristics (e.g., fiber orientation, porosity, dimensionality, viscoelasticity) influence MSC-immune cell interactions.
• Discussion of strategies for applying biophysical cue control in MSC-based therapeutics.

Main Results:

• Biophysical cues in synthetic matrices can mimic native microenvironments to study and control cellular functions.
• Specific matrix properties demonstrably impact MSC-mediated immunomodulation.
• Controlled biophysical cues offer a pathway to enhance the efficacy of MSC therapies.

Conclusions:

• Biophysical cues are powerful mediators of MSC immunomodulatory functions.
• Tailoring microenvironmental cues through biomaterials can optimize MSC isolation, priming, and delivery for therapeutic applications.
• Integrating biophysical cue assessment into MSC potency assays may improve the predictability of clinical success.