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3D-Printed PCL/Zn scaffolds for bone regeneration with a dose-dependent effect on osteogenesis and osteoclastogenesis
Open accessAbstract
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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“poly(ɛ-caprolactone) (PCL), approved by the Food and Drug Administration (FDA), is widely used in bone regeneration because of its mechanical properties, good biocompatibility, and easy processing due to the low melting temperature of ~ 60 °C [27][28][29][30][31]”
From A strategy to tailor the mechanical and degradation properties of PCL-PEG-PCL based copolymers for biomedical application (2023) · cites this paper as [29]
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Sorted by citations
Liu, Y.-Y., Blázquez, J. P. F., Yin, G.-Z., Wang, D.-Y., Llorca, J., & Echeverry-Rendón, M. (2023) · arXiv · doi:10.48550/arxiv.2308.15503 · Cited by 46
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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)
- PMC
- PMC8753274
- 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
- gold
- doi.org
- Licence
- 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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