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Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy
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Functionalizing micro-3D-printed protein hydrogels for cell adhesion and patterning.

D S Hernandez1, E T Ritschdorff, S K Seidlits

  • 1Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA. jshear@cm.utexas.edu.

Journal of Materials Chemistry. B
|April 9, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a method to precisely pattern biomolecules onto 3D-printed hydrogels. This technique allows independent control of cell adhesion cues, crucial for studying cell-matrix interactions and tissue regeneration.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Tissue Engineering

Background:

  • The extracellular matrix (ECM) significantly impacts cell behavior, including morphology, adhesion, differentiation, and alignment, via its chemical, mechanical, and topographical characteristics.
  • Controlling these microenvironmental cues independently is vital for dissecting cell-matrix interactions and their role in biological processes.

Purpose of the Study:

  • To present a versatile platform for functionalizing micro-3D-printed (μ-3DP) protein hydrogels with biomolecules.
  • To demonstrate the ability to precisely pattern cell-adhesive peptides onto hydrogel surfaces.
  • To investigate the decoupled effects of chemical modifications on cell behavior within 3D environments.

Main Methods:

  • Utilized multiphoton excitation of benzophenone-biotin to photoactivate and link a biotinylated cell-adhesive peptide to the μ-3DP protein hydrogel matrix via a NeutrAvidin® bridge.
  • Developed a functionalization strategy applicable to various hydrogel platforms for precise biomolecule patterning.
  • Verified that chemical modifications did not significantly alter the hydrogel's mechanical or topographical properties affecting cell adhesion.

Main Results:

  • Successfully demonstrated the patterning of Schwann cells on functionalized μ-3DP protein hydrogels.
  • Showcased the ability to independently control chemical cues without altering mechanical or topographical properties influencing cell adhesion.
  • Generated arbitrary immobilized chemical gradient profiles within the hydrogels.

Conclusions:

  • The developed functionalization strategy enables precise spatial control of biomolecules within 3D hydrogel materials.
  • This method allows for the independent manipulation of chemical cues, facilitating the study of decoupled cell-matrix interactions.
  • The ability to create chemical gradients opens opportunities for understanding and controlling haptotaxis in tissue regeneration applications.