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Bone Remodeling

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Updated: May 8, 2025

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Published on: December 10, 2010

Polyetheretherketone Double Functionalization with Bioactive Peptides Improves Human Osteoblast Response.

Leonardo Cassari¹, Cristian Balducci¹, Grazia M L Messina²

¹Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy.

Biomimetics (Basel, Switzerland)

|December 27, 2024

Summary

Functionalizing 3D-printed Polyetheretherketone (PEEK) with specific bioactive peptides significantly enhances human osteoblast response. This dual-peptide approach improves orthopedic implant biocompatibility and osteogenic gene expression.

Keywords:

EAK GBMP1α PEEK bone tissue engineering

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Area of Science:

Biomaterials Science
Orthopedic Engineering
Cell Biology

Background:

Rising life expectancy increases demand for advanced orthopedic implants.
Traditional metal implants present challenges like mismatched elastic modulus and ion release.
Polyetheretherketone (PEEK) offers a promising alternative with tunable properties.

Purpose of the Study:

To functionalize 3D-printed PEEK with bioactive peptides Aoa-GBMP1α and Aoa-EAK.
To evaluate the effect of peptide functionalization on human osteoblast response.
To assess the potential of dual-peptide functionalized PEEK for orthopedic applications.

Main Methods:

Sandblasting and 3D printing of PEEK disks.
Surface characterization using XPS, white light interferometry, S-WCA, and AFM-FS.
Biological assays including HOB proliferation, calcium deposition, and osteogenic gene expression analysis.

Main Results:

Dual peptide functionalization significantly increased human osteoblast proliferation.
Enhanced calcium deposition was observed on functionalized PEEK surfaces.
Upregulation of key osteogenic genes (RUNX2, SPP1, VTN) was confirmed.

Conclusions:

Dual peptide-functionalized PEEK demonstrates superior biocompatibility and osteoinductivity.
This approach holds significant potential for developing next-generation orthopedic implants.
Peptide modification of PEEK offers a promising strategy to improve bone integration and implant success rates.