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Engineering the MSC Secretome: A Hydrogel Focused Approach.

Marissa E Wechsler1,2, Varsha V Rao1,2, Alexandra N Borelli1,2

  • 1Department of Chemical and Biological Engineering, University of Colorado-Boulder, 3415 Colorado Avenue, Boulder, CO, 80303, USA.

Advanced Healthcare Materials
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Hydrogel platforms can enhance mesenchymal stromal/stem cell (MSC) therapies by improving cell properties during expansion and survival after delivery. Tailored hydrogels optimize MSC secretomes for better clinical outcomes.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Regenerative Medicine

Background:

  • Mesenchymal stromal/stem cells (MSCs) offer therapeutic benefits primarily through secreted factors.
  • Clinical application of MSCs is limited by loss of regenerative potential during expansion and poor survival post-delivery.

Purpose of the Study:

  • To review how hydrogel culture platforms can overcome limitations in MSC-based therapies.
  • To explore engineering hydrogels to modulate the MSC microenvironment for improved proliferation, survival, and directed secretion.

Main Methods:

  • Review of how hydrogel material properties (e.g., modulus, viscoelasticity, dimensionality, adhesion, porosity) influence MSC secretion via cell-matrix and cell-cell interactions.
  • Highlighting the role of biochemical cues (small molecules, peptides, proteins) in directing MSC secretory profiles.

Main Results:

  • Hydrogel properties significantly influence MSC secretion and regenerative potential.
  • Biophysical and biochemical cues within hydrogels can be tailored to optimize MSC function.

Conclusions:

  • Hydrogel platforms offer a promising strategy to enhance MSC therapies by controlling the cellular microenvironment.
  • Future biomaterial design focusing on optimized cues is crucial for advancing MSC clinical translation.