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Modified Titanium Surface-Mediated Effects on Human Bone Marrow Stromal Cell Response.

Amol Chaudhari1, Joke Duyck2, Annabel Braem3

  • 1BIOMAT Research Cluster, Department of Oral Health Sciences and Prosthetic Dentistry, KU Leuven and University Hospitals Leuven, Kapucijnenvoer 7 box 7001, Leuven 3000, Belgium. Amol.Chaudhari1911@gmail.com.

Materials (Basel, Switzerland)
|August 10, 2017
PubMed
Summary
This summary is machine-generated.

Amorphous microporous silica (AMS) with bone morphogenetic protein-2 (BMP) shows promise for enhancing implant osseointegration. Uncoated titanium and AMS supported cell proliferation, while AMS + BMP demonstrated significant pro-osteogenic and pro-angiogenic potential.

Keywords:
human bone marrow stromal cellsin vitro cytocompatibilityosseointegrationosteogenic differentiationsurface coatingtitanium

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Research

Background:

  • Surface modification of titanium implants is crucial for improving osseointegration and clinical outcomes.
  • Evaluating novel surface modifications is essential for enhancing implant biocompatibility and biological response.
  • Understanding cellular interactions with modified implant surfaces guides the development of next-generation orthopedic devices.

Purpose of the Study:

  • To assess the cytocompatibility and pro-osteogenic/pro-angiogenic properties of five modified titanium surfaces for human mesenchymal stromal cells.
  • To compare amorphous microporous silica (AMS), AMS with immobilized bone morphogenetic protein-2 (AMS + BMP), bioactive glass (BAG), and two porous titanium coatings (T1, T2) against control surfaces.
  • To investigate the impact of surface modifications on cell proliferation, osteogenic differentiation, and angiogenic factor production.

Main Methods:

  • Human mesenchymal stromal cells transfected with eGFP-fLuc were used to assess proliferation via fluorescence microscopy and bio-luminescence imaging.
  • Osteogenic parameters (alkaline phosphatase, osteocalcin, osteoprotegerin) and angiogenic parameters (vascular endothelial growth factor-A) were quantified.
  • Comparative analysis of uncoated Ti, Ti + BMP, TiO₂, and tissue culture polystyrene (TCPS) surfaces was performed alongside the novel modifications.

Main Results:

  • Uncoated Ti and AMS surfaces supported unrestrained cell proliferation, while BAG, T1, and T2 did not support proliferation.
  • The AMS + BMP surface exhibited significant pro-osteogenic and pro-angiogenic potential.
  • Slower BMP-2 release from AMS compared to Ti correlated with enhanced osteogenic differentiation, and unfunctionalized Ti showed superior OPG and VEGF-A production over AMS.

Conclusions:

  • Amorphous microporous silica (AMS) is a promising material for delivering bioactive agents, particularly when combined with bone morphogenetic protein-2 (BMP).
  • The AMS + BMP surface demonstrates superior osteogenic and angiogenic potential compared to BMP-functionalized titanium, suggesting improved osseointegration capabilities.
  • Further research into AMS-based coatings could lead to advanced implant designs with enhanced biological performance and patient outcomes.