4D printing of metallic metamaterials for bone implants via biodegradation
Ontology highlight
ABSTRACT:
INSTRUMENT(S):
ORGANISM(S): Rabbit Calicivirus Rabbit Picobirnavirus
TISSUE(S): Stem Cell, Bone Matrix
DISEASE(S): Wounds And Injuries
SUBMITTER: 
Yu Qin
LAB HEAD: Yu Qin
PROVIDER: PXD073293 | Pride | 2026-05-04
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Proteomic.mzML | Mzml | |||
| checksum.txt | Txt | |||
| searchengine.txt | Txt |
Items per page: 5 1 - 3 of 3 |
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Project description:4D printing, integrating the temporal dimension into 3D printing, offers transformative potential for bone implants. Yet its application to metallic materials is constrained by the scarcity of suitable alloys and the requirement for harsh external stimuli to trigger shape change. Here, we introduce 4D printed metallic metamaterials (4DMM) driven by controlled biodegradation. The 4DMM combine biodegradable constraints (e.g., Mg or Zn) with biometals of higher corrosion potential (e.g., Ti). Upon electrochemical degradation of the constraint, the metamaterials recover their original geometry—via stretching, bending, or expansion—generating programmable recoil forces tuned through structural design parameters. When developed as scaffolds for bone implants, 4DMM exhibit excellent cytocompatibility and, in vivo, promote superior bone regeneration through the synergistic effects of bioactivity and mechanical stimulation. This strategy establishes a new paradigm in 4D metal printing via metamaterial design, enabling bioactive, self-restoring implants with broad applicability across biomedical engineering.
2026-05-04 | PXD072881 | Pride
Project description:While implant materials with bone-mimetic elastic moduli are theoretically advantageous for reducing the stress shielding effect, the underlying mechanism remains incompletely understood, particularly in alveolar bone applications. In this study, we investigate the mechanism of excellent peri-implant bone quality of a Zr58Cu25Al14Nb3 bulk metallic glass (Nb3) dental implant in terms of its lower elastic modulus than commercial pure titanium (cpTi) and the stress distribution under masticatory mechanical loading. In vitro, Nb3 exhibits enhanced osteogenic potential over cpTi. In vivo, rat maxillary molar implants are subjected to a controllable cyclic loading program (10 N, 3 Hz, 0.12 s duration, 1800 cycles/day). The animal model coupled finite element analysis confirms that the lower elastic modulus of Nb3 implants promotes the more physiological stress distribution, and thus reduces stress concentration while increasing strain energy density in peri-implant bone. Histomorphometry reveals that loaded Nb3 implants significantly accelerate mineral apposition rate, upregulate collagen III, and increase osteoblast density while reducing osteocyte number, demonstrating improved mechano-adaptation. Transcriptomics identify coordinated upregulation of osteogenic, angiogenic, and mechanosensitive markers in Nb3-loaded bone. Immunohistochemistry validates elevated expression of osteopontin and periostin, key mediators of mechanical signaling. These findings establish that Nb3’s optimal elastic modulus enhances peri-implant bone quality through biomechanical optimization of stress transfer that further activates mechanotransductive osteogenesis, providing a material-based solution to stress shielding.
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Project description:Tantalum (Ta) metal is well known for its ideal corrosion resistance and biological effects as endosseous implants. However, the metal has a elastic modulus as high as 186GPa which is not comparable to the natural bone (10-40GPa), and it also has a relative high cost. Here, to fully exploit the advantages of Ta as endosseous implants, a small amount of Ta (as low as 3 at.%) was successfully added into a zirconium-based metallic glass (MG) to generate an advanced functional endosseous implant, Zr58Cu25Al14Ta3 MG, with superior comprehensive properties. Upon carefully dissecting the surface chemistry and atomic structure, the results show that amorphization of Ta enable the uniform distribution in material surface, leading to a significantly improved chemical stability and extensive material-cell contact regulation. Systematical analyses on the immunological, angiogenesis and osteogenesis capability of the material is carried out by utilizing the next-generation sequencing, revealing that Zr58Cu25Al14Ta3 MG can regulate angiogenesis through VEFG signaling pathway and osteogenesis via BMP signaling pathway. Animal experiment further confirms a sound osseointegration of Zr58Cu25Al14Ta3 MG in achieving better bone-implant-contact and inducing faster peri-implant bone formation.
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Project description:Tantalum (Ta) metal is well known for its ideal corrosion resistance and biological effects as endosseous implants. However, the metal has a elastic modulus as high as 186GPa which is not comparable to the natural bone (10-40GPa), and it also has a relative high cost. Here, to fully exploit the advantages of Ta as endosseous implants, a small amount of Ta (as low as 3 at.%) was successfully added into a zirconium-based metallic glass (MG) to generate an advanced functional endosseous implant, Zr58Cu25Al14Ta3 MG, with superior comprehensive properties. Upon carefully dissecting the surface chemistry and atomic structure, the results show that amorphization of Ta enable the uniform distribution in material surface, leading to a significantly improved chemical stability and extensive material-cell contact regulation. Systematical analyses on the immunological, angiogenesis and osteogenesis capability of the material is carried out by utilizing the next-generation sequencing, revealing that Zr58Cu25Al14Ta3 MG can regulate angiogenesis through VEFG signaling pathway and osteogenesis via BMP signaling pathway. Animal experiment further confirms a sound osseointegration of Zr58Cu25Al14Ta3 MG in achieving better bone-implant-contact and inducing faster peri-implant bone formation.
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Project description:Tantalum (Ta) metal is well known for its ideal corrosion resistance and biological effects as endosseous implants. However, the metal has a elastic modulus as high as 186GPa which is not comparable to the natural bone (10-40GPa), and it also has a relative high cost. Here, to fully exploit the advantages of Ta as endosseous implants, a small amount of Ta (as low as 3 at.%) was successfully added into a zirconium-based metallic glass (MG) to generate an advanced functional endosseous implant, Zr58Cu25Al14Ta3 MG, with superior comprehensive properties. Upon carefully dissecting the surface chemistry and atomic structure, the results show that amorphization of Ta enable the uniform distribution in material surface, leading to a significantly improved chemical stability and extensive material-cell contact regulation. Systematical analyses on the immunological, angiogenesis and osteogenesis capability of the material is carried out by utilizing the next-generation sequencing, revealing that Zr58Cu25Al14Ta3 MG can regulate angiogenesis through VEFG signaling pathway and osteogenesis via BMP signaling pathway. Animal experiment further confirms a sound osseointegration of Zr58Cu25Al14Ta3 MG in achieving better bone-implant-contact and inducing faster peri-implant bone formation.
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Project description:Bone development and regeneration is associated with the Wnt signaling pathway that, according to literature, can be modulated by lithium ions (Li+). The aim of this study was to evaluate the gene expression profile during peri-implant healing of poly(lactic-co-glycolic acid) (PLGA) implants with incorporated Li+, while PLGA without Li+ was used as control, and a special attention was then paid to the Wnt signaling pathway. The implants were inserted in rat tibia for 7 or 28 days and the gene expression profile was investigated using a genome-wide microarray analysis. The results were verified by qPCR and immunohistochemistry. Histomorphometry was used to evaluate the possible effect of Li+ on bone regeneration. The microarray analysis revealed a large number of significantly differentially regulated genes over time within the two implant groups. The Wnt signaling pathway was significantly affected by Li+, with approximately 34% of all Wnt-related markers regulated over time, compared to 22% for non-Li+ containing (control; Ctrl) implants. Functional cluster analysis indicated skeletal system morphogenesis, cartilage development and condensation as related to Li+. The downstream Wnt target gene, FOSL1, and the extracellular protein-encoding gene, ASPN, were significantly upregulated by Li+ compared with Ctrl. The presence of β-catenin, FOSL1 and ASPN positive cells was confirmed around implants of both groups. Interestingly, a significantly reduced bone area was observed over time around both implant groups. The presence of periostin and calcitonin receptor-positive cells was observed at both time points. This study is to the best of the authors’ knowledge the first report evaluating the effect of a local release of Li+ from PLGA at the fracture site. The present study shows that during the current time frame and with the present dose of Li+ in PLGA implants, Li+ is not an enhancer of early bone growth, although it affects the Wnt signaling pathway. PLGA implants with +/- incorporated Li were inserted in rat tibia for 7 or 28 days, peri-implant bone was harvested and RNA extracted using Qiazol lysis reagent and TissueLyser followed by Qiagen's Rneasy Micro Kit. The microarray experiment was conducted at SCIBLU Genomics (www.lu.se/sciblu) according to Affymetrix guidelines (n=6).
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Project description:Bone development and regeneration is associated with the Wnt signaling pathway that, according to literature, can be modulated by lithium ions (Li+). The aim of this study was to evaluate the gene expression profile during peri-implant healing of poly(lactic-co-glycolic acid) (PLGA) implants with incorporated Li+, while PLGA without Li+ was used as control, and a special attention was then paid to the Wnt signaling pathway. The implants were inserted in rat tibia for 7 or 28 days and the gene expression profile was investigated using a genome-wide microarray analysis. The results were verified by qPCR and immunohistochemistry. Histomorphometry was used to evaluate the possible effect of Li+ on bone regeneration. The microarray analysis revealed a large number of significantly differentially regulated genes over time within the two implant groups. The Wnt signaling pathway was significantly affected by Li+, with approximately 34% of all Wnt-related markers regulated over time, compared to 22% for non-Li+ containing (control; Ctrl) implants. Functional cluster analysis indicated skeletal system morphogenesis, cartilage development and condensation as related to Li+. The downstream Wnt target gene, FOSL1, and the extracellular protein-encoding gene, ASPN, were significantly upregulated by Li+ compared with Ctrl. The presence of β-catenin, FOSL1 and ASPN positive cells was confirmed around implants of both groups. Interestingly, a significantly reduced bone area was observed over time around both implant groups. The presence of periostin and calcitonin receptor-positive cells was observed at both time points. This study is to the best of the authors’ knowledge the first report evaluating the effect of a local release of Li+ from PLGA at the fracture site. The present study shows that during the current time frame and with the present dose of Li+ in PLGA implants, Li+ is not an enhancer of early bone growth, although it affects the Wnt signaling pathway.
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Project description:Gold salts has been used in the treatment of rheumatoid arthritis but has been replaced by biologicals such as TNF-alpha inhibitors. The mechanisms behind the anti-inflammatory effect of metallic gold ions are still unknown, however, recent data showed that charged gold atoms are released from pure metallic gold implants by macrophages via a dissolucytosis membrane, and that gold ions are taken up by local macrophages, mast cells and to some extent fibroblasts. These current findings offer new treatment options for metallic gold and deeper understanding of the effect of metallic gold on key inflammatory cells as macrophages are essential. In the present study the impact of phagocytised gold ions on the global gene expression profile of the human monocytic cell line THP-1 was investigated, using microarray analysis comprising approximately 20,000 genes. The gene expression data was confirmed by measurement of three secreted proteins. A unique gene expression signature of dissolucytotic macrophages that had taken up gold ions was demonstrated. A large number of regulated genes were functionally related to immunomodulation/protection. Gold ion uptake into macrophages induced downregulation of central inflammatory cytokines as TNF-alpha, IL-32 and CD28. The data obtained in this study offer new insights into the mode of action of gold ions and suggest a future role of metallic gold as implants or topical applications in treating inflammation.
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