Cited by 115Bone Tissue Engineering MaterialsMagnesium Alloys: Properties and ApplicationsDental Implant Techniques and Outcomes

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3D-Printed PCL/Zn scaffolds for bone regeneration with a dose-dependent effect on osteogenesis and osteoclastogenesis

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Abstract

Polycaprolactone (PCL) is a polymer material suitable for being prepared into porous scaffolds used in bone tissue engineering, however, insufficient osteogenic ability and mechanical strength limit its application. Zinc (Zn) alloy with proper mechanical strength and osteogenesis is a promising biodegradable metal that have attracted much attention. Herein, we combined the advantages of PCL and Zn by fabricating PCL/Zn composite scaffolds with different Zn powder contents (1 ​wt%, 2 ​wt%, 3 ​wt%) through fused deposition modelling. The ​mechanical property, cytocompatibility and Zn ​ions release ​behavior of PCL/Zn scaffolds were analyzed ​in vitro. The osteogenesis and osteoclastogenesis properties of the scaffolds were evaluated by being implanted into Sprague–Dawley rats calvaria defect. Results showed that the PCL/Zn scaffolds exhibited improved mechanical properties and cytocompatibility compared with the pure PCL scaffolds. At 8 weeks after in vivo implantaion, the addition of Zn powder promoted new bone formation, in a dose-dependent manner. The scaffolds with 2 ​wt% Zn displayed the best osteogenic effect, while the osteogenic effect was slightly reduced in the scaffolds with 3 ​wt% Zn. In the studied Zn contents, the PCL/Zn scaffolds gradually promoted osteoclastogenesis with increasd Zn content. In the 3 ​wt% Zn group, TRAP-positive cells were observed on the newly formed bone edges around the scaffolds. These dose-dependent effects were verified in vitro using MC3T3-E1 and RAW264.7 ​cells. Finally, we revealed that Zn2+ regulated osteogenesis and osteoclastogenesis by activation of the Wnt/β-catenin and NF-κB signalling pathways, respectively.

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Metadata

Authors
Wang, S., Gu, R., Wang, F., Zhao, X., Yang, F., Xu, Y., Yan, F., Zhu, Y., Xia, D., & Liu, Y.
Affiliations
Peking University (CN)
Corresponding author
  • Xia, Dandan
  • Liu, Yunsong
Venue
Materials Today Bio
Publisher
Elsevier BV
Published
2022-01
Volume
13
Pages
100202
ISSN
2590-0064 (ISSN-L)
OpenAlex
W4205686195
Cited by
115
References
0
Citations by year
2026: 13 · 2025: 32 · 2024: 38 · 2023: 23 · 2022: 9
FWCI
7.48
Type
journal article
Language
en
Open access
Locations
  • Materials Today Bio (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Natural Science Foundation of Beijing Municipality (L212014)
  • National Natural Science Foundation of China (81970908, 82170929, 81771039, 51901003)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Bone Tissue Engineering Materials
  • Physical Sciences › Materials Science › Biomaterials › Magnesium Alloys: Properties and Applications
  • Health Sciences › Dentistry › Oral Surgery › Dental Implant Techniques and Outcomes
Keywords
polycaprolactone, zinc alloys, 3D-printed scaffolds, fused deposition modeling, bone regeneration, bone formation, osteoclastogenesis, zinc ion release, dose-dependent effects, Wnt/β-catenin signaling, NF-κB signaling, calvarial defect, cytocompatibility, mechanical properties

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