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

Álvaro J Leite1,2, Nuno M Oliveira1,2, Wenlong Song3

  • 13B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine, Avepark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal.

Scientific Reports
|October 14, 2018
PubMed
Summary
This summary is machine-generated.

Engineered bioactive hydrogel marbles (BHMs) using hydrophobic bioactive glass nanoparticles offer a novel platform for bone tissue engineering. These structures support cell growth, controlled drug release, and promote bone-like apatite formation.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Tissue Engineering

Background:

  • Liquid marbles, formed by particle films confining liquid drops, offer advanced fluid manipulation capabilities.
  • Bioactive glass nanoparticles (BGNPs) are known for their bone regenerative properties.
  • Hydrogels provide a biocompatible scaffold for cell encapsulation and drug delivery.

Purpose of the Study:

  • To engineer a novel bioactive hydrogel marble (BHM) for bone tissue engineering applications.
  • To functionalize pristine BGNPs into hydrophobic BGNPs (H-BGNPs) to create a stable BHM shell.
  • To evaluate the BHM's capacity for apatite layer formation, drug delivery, and cell encapsulation.

Main Methods:

  • Chemical modification of pristine bioactive glass nanoparticles to create hydrophobic BGNPs (H-BGNPs).
  • Encapsulation of a gelatin-based hydrogel bead within the H-BGNPs to form the BHM.
  • Assessment of apatite layer formation in a physiological environment.
  • Evaluation of drug release kinetics and cell encapsulation, viability, and osteogenic differentiation.

Main Results:

  • The engineered BHM shell successfully promoted the growth of a bone-like apatite layer.
  • BHMs demonstrated controlled, simultaneous release of distinct encapsulated therapeutic molecules.
  • The BHMs exhibited excellent in vitro stability and cytocompatibility, sustaining cell encapsulation in a 3D environment.
  • The engineered structures showed potential to induce osteogenic commitment in a pre-osteoblastic cell line.

Conclusions:

  • Bioactive hydrogel marbles fabricated with H-BGNPs represent a promising new platform for bone tissue engineering.
  • These hierarchical nanostructured marbles offer controlled drug delivery, support cell viability, and promote osteogenesis.
  • The developed BHMs hold significant potential for future regenerative medicine applications in bone repair.