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Bimetallic Metal-Organic Framework for Mitigating Aseptic Osteolysis.

Huajun Pan1, Xinxin Miao1, Jianjian Deng1

  • 1Department of Orthopedics, the Second Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, Jiangxi330006, P. R. China.

ACS Applied Materials & Interfaces
|January 19, 2023
PubMed
Summary

New platinum-based nanozymes combat joint loosening by reducing inflammation and boosting bone growth. This innovative material, Pt@ZIF-8@La, enhances artificial joint longevity and efficacy.

Keywords:
aseptic looseningbone regenerationlanthanumnanozymereactive oxygen species

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Orthopedics

Background:

  • Artificial joints can fail due to loosening, often caused by wear particles triggering inflammation and reducing bone formation.
  • Macrophage activation by wear particles leads to reactive oxygen species (ROS) and inflammatory factors, impairing osteogenesis and causing aseptic osteolysis.

Purpose of the Study:

  • To develop a multifunctional nanoplatform for treating aseptic osteolysis and improving artificial joint lifespan.
  • To create a bimetallic metal-organic framework (Pt@ZIF-8@La) with ROS scavenging, anti-inflammatory, and osteogenic properties.

Main Methods:

  • Encapsulation of platinum (Pt) nanozymes in zinc imidazolium zeolite framework-8 (ZIF-8).
  • Introduction of lanthanum (La) via ion exchange to form Pt@ZIF-8@La.
  • In vitro and in vivo experiments to evaluate ROS scavenging, immune regulation, and osteogenic differentiation.

Main Results:

  • Pt@ZIF-8@La effectively scavenged ROS and exhibited anti-inflammatory properties.
  • The nanoplatform promoted osteogenic differentiation and mineralization.
  • Upregulation of the osteoprotegerin (OPG)/receptor activator of the NF-κB ligand (RANKL) ratio was observed, indicating enhanced bone formation.

Conclusions:

  • The multifunctional Pt@ZIF-8@La nanoplatform offers a synergistic therapeutic approach for immunomodulation and osteogenesis.
  • This strategy effectively relieves aseptic osteolysis, potentially extending the lifespan of artificial joints.