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Platelet-Derived Extracellular Vesicle Functionalization of Ti Implants
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Osteogenesis Catalyzed by Titanium-Supported Silver Nanoparticles.

Huiliang Cao1, Wenjie Zhang2, Fanhao Meng1

  • 1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China.

ACS Applied Materials & Interfaces
|January 24, 2017
PubMed
Summary
This summary is machine-generated.

Immobilized silver nanoparticles (Ag NPs) on titanium promote bone cell growth and implant integration by activating specific cell signaling pathways, offering a safer approach for antibacterial medical devices.

Keywords:
differentiationintegrinosteointegrationsilverstem cellstitanium

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Cell Biology

Background:

  • Silver nanoparticles (Ag NPs) show promise for antimicrobial uses but raise cytotoxicity concerns for medical applications.
  • Developing safe and effective antibacterial implantable devices using nanomaterials remains a challenge.

Purpose of the Study:

  • To fabricate and immobilize silver nanoparticles (Ag NPs) on titanium surfaces.
  • To investigate the effects of immobilized Ag NPs on osteoblast differentiation and bone marrow stem cell (BMSC) behavior.
  • To explore the mechanism by which Ag NPs influence osteogenesis and osteointegration.

Main Methods:

  • In situ fabrication and immobilization of Ag NPs (4–19 nm) on titanium using plasma immersion ion implantation.
  • Assessment of Ag NP effects on rat bone marrow stem cells (BMSCs) and osteoblast differentiation.
  • Analysis of the integrin α5-mediated MAPK/ERK signaling pathway activation.
  • Investigation of galvanic hydrogen evolution reactions triggered by Ag NPs.

Main Results:

  • Immobilized Ag NPs activated the integrin α5-orchestrated MAPK/ERK signaling cascade in BMSCs, promoting osteoblast differentiation.
  • The density of immobilized Ag NPs correlated positively with the activation of integrin α5 via galvanic hydrogen evolution.
  • Extracellular effects of immobilized Ag NPs on osteogenesis were observed, suggesting reduced cellular uptake-related cytotoxicity.
  • Enhanced osteointegration of titanium was promoted by the surface-immobilized Ag NPs.

Conclusions:

  • Titanium-supported Ag NPs can safely promote osteogenesis and osteointegration by modulating extracellular cellular responses.
  • This approach offers a strategy for developing novel antibacterial devices with tailored toxicity profiles.
  • Understanding the extracellular effects of nanomaterials is crucial for their safe application in biomedical implants.