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FRET Imaging in Three-dimensional Hydrogels
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3D high-resolution two-photon crosslinked hydrogel structures for biological studies.

Laura Brigo1, Anna Urciuolo2, Stefano Giulitti2

  • 1Industrial Engineering Department & INSTM Padova RU, University of Padova, Padova 35131, Italy; Center for Materials and Microsystems, Bruno Kessler Foundation, Trento 38123, Italy; Venetian Institute of Molecular Medicine, Padova 35129, Italy.

Acta Biomaterialia
|March 30, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed high-resolution 3D gelatin hydrogel woodpile scaffolds using two-photon crosslinking. These biocompatible scaffolds support cell adhesion, migration, and deformation, offering new possibilities for 3D cell culture and tissue engineering.

Keywords:
Cell adhesionCollagenHydrogelsScaffoldsTwo photon crosslinking

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Area of Science:

  • Biomaterials Engineering
  • Tissue Engineering
  • Cell Biology

Background:

  • Hydrogels serve as versatile matrices for cell growth, mimicking natural extracellular matrices.
  • Microfabrication of hydrogels into complex 3D structures is crucial for studying cell behavior in 3D.
  • High-resolution scaffolds are needed to investigate cell-matrix interactions at the molecular level.

Purpose of the Study:

  • To design and develop high-resolution 3D gelatin hydrogel woodpile structures.
  • To assess the biocompatibility and cell interaction capabilities of these 3D scaffolds.
  • To explore the potential of these structures for 3D cell culture and tissue modeling.

Main Methods:

  • Utilized two-photon crosslinking for fabricating 3D gelatin hydrogel woodpile structures.
  • Characterized the lateral linewidth down to 0.5µm and resolution down to a few µm.
  • Investigated cell adhesion, migration, and deformation on the fabricated scaffolds using human BJ cell lines.

Main Results:

  • Achieved high-resolution 3D gelatin hydrogel woodpile structures with tunable polymerization and swelling.
  • Demonstrated biocompatibility, promoting cell adhesion and migration.
  • Observed significant cell invasion and deformation of the 3D hydrogel structures by human BJ cells.

Conclusions:

  • High-resolution 3D gelatin hydrogel woodpiles fabricated by two-photon crosslinking are suitable for cell accommodation.
  • Cells actively invade and deform these 3D structures, comparable to bare substrates.
  • These scaffolds offer a promising platform for customized 3D tissue models and studies on cell adhesion and deformation.