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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications
09:19

Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

Published on: September 15, 2017

Micropatterning of bioactive self-assembling gels.

Alvaro Mata1, Lorraine Hsu, Ramille Capito

  • 1Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, IL, 60611, USA. E-mail: s-stupp@northwestern.edu ; ; Tel: (+312) 503-6713.

Soft Matter
|January 5, 2010
PubMed
Summary
This summary is machine-generated.

Researchers created 3D patterned bioactive materials using self-assembling peptide amphiphiles (PAs) to mimic extracellular matrices. These materials guide human mesenchymal stem cell (hMSC) alignment and enhance osteoblastic differentiation on specific microtextures.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Tissue Engineering

Background:

  • Microscale topographical features influence cell behavior.
  • Integrating top-down fabrication with bottom-up self-assembly is key for 3D patterned bioactive extracellular matrix mimics.

Purpose of the Study:

  • To develop a novel approach for creating 3D patterned bioactive nanofiber gels.
  • To investigate the behavior of human mesenchymal stem cells (hMSCs) on these patterned surfaces.

Main Methods:

  • Incorporated polymerizable acetylene groups into peptide amphiphiles (PAs).
  • Utilized self-assembly of PAs within microfabricated molds to create patterned nanofiber gels (~30 nm diameter).
  • Fabricated topographical patterns including holes, posts, and channels with microscale dimensions.

Main Results:

  • hMSCs aligned with the direction of aligned nanofibers in topographical patterns, even with hole microtextures.
  • Cell alignment persisted when encountering perpendicular channel microtextures.
  • Osteoblastic differentiation of hMSCs was enhanced on hole microtextures within randomly oriented nanofiber patterns.

Conclusions:

  • Demonstrated a novel method for fabricating 3D patterned bioactive materials using self-assembling PAs.
  • Showcased the ability of these materials to control hMSC alignment and differentiation based on topographical cues.
  • Highlighted the potential of microscale topographical patterns for guiding stem cell fate.