1
|
Büssemaker H, Meinshausen AK, Bui VD, Döring J, Voropai V, Buchholz A, Mueller AJ, Harnisch K, Martin A, Berger T, Schubert A, Bertrand J. Silver-integrated EDM processing of TiAl6V4 implant material has antibacterial capacity while optimizing osseointegration. Bioact Mater 2024; 31:497-508. [PMID: 37736105 PMCID: PMC10509668 DOI: 10.1016/j.bioactmat.2023.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 04/29/2023] [Accepted: 08/24/2023] [Indexed: 09/23/2023] Open
Abstract
Periprosthetic joint infections (PJI) are a common reason for orthopedic revision surgeries. It has been shown that the silver surface modification of a titanium alloy (Ti-6Al-4V) by PMEDM (powder mixed electrical discharge machining) exhibits an antibacterial effect on Staphylococcus spp. adhesion. Whether the thickness of the silver-modified surface influences the adhesion and proliferation of bacteria as well as the ossification processes and in-vivo antibacterial capacity has not been investigated before. Therefore, the aim of this work is to investigate the antibacterial effect as well as the in vitro ossification process depending on the thickness of PMEDM silver modified surfaces. The attachment of S. aureus on the PMEDM modified surfaces was significantly lower than on comparative control samples, independently of the tested surface properties. Bacterial proliferation, however, was not affected by the silver content in the surface layer. We observed a long-term effect of antibacterial capacity in vitro, as well as in vivo. An induction of ROS, as indicator for oxidative stress, was observed in the bacteria, but not in osteoblast-like cells. No influence on the in vitro osteoblast function was observed, whereas osteoclast formation was drastically reduced on the silver surface. No changes in cell death, the metabolic activity and oxidative stress was measured in osteoblasts. We show that already small amounts of silver exhibit a significant antibacterial capacity while not influencing the osteoblast function. Therefore, PMEDM using silver nano-powder admixed to the dielectric represents a promising technology to shape and concurrently modify implant surfaces to reduce infections while at the same time optimizing bone ingrowth of endoprosthesis.
Collapse
Affiliation(s)
- Hilmar Büssemaker
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Germany
| | | | - Viet Duc Bui
- Professorship Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
| | - Joachim Döring
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Germany
| | - Vadym Voropai
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Germany
| | - Adrian Buchholz
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Germany
| | - Andreas J. Mueller
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Karsten Harnisch
- Institute of Materials and Joining Technology, Otto-von-Guericke University, Magdeburg, Germany
| | - André Martin
- Professorship Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
| | - Thomas Berger
- Professorship Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
| | - Andreas Schubert
- Professorship Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
- Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
| | - Jessica Bertrand
- Department of Orthopaedic Surgery, Otto-von-Guericke University Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| |
Collapse
|
2
|
Zhang X, Zhu Z, Liu W, Gao F, Guo J, Song B, Lee LP, Zhang F. The Selective Function of Quantum Biological Electron Transfer between DNA Bases and Metal Ions in DNA Replication. J Phys Chem Lett 2022; 13:7779-7787. [PMID: 35969805 DOI: 10.1021/acs.jpclett.2c01877] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Metal ions play vital roles in the electron transfer between biological molecules in humans, animals, and plants. However, the electron transfer between metal ions and nucleic acids and its impact on DNA-ion binding during DNA replication has been ignored. Here, we present a long-range quantum biological electron transfer (QBET) between DNA bases and metal ions and its selective function of DNA-ion binding in DNA replication. We discover biophysical DNA-ion binding and create biological filters that allow selective DNA replication by dual modulators of the valence and concentration of metal ions. QBET-based DNA replication filters provide powerful tools for ultrasensitive polymerase chain reaction (PCR) to selectively amplify target sequences with a discrete concentration window of metal ions; for example, Au3+ exhibits a concentration window that is approximately 3 orders of magnitude lower than that of Na+. DNA-ion filters provide new perspectives into metal ion-mediated QBET in DNA replication and hold great potential in life sciences and medical applications.
Collapse
Affiliation(s)
- Xianjing Zhang
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Zhi Zhu
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Wenpeng Liu
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Feng Gao
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jun Guo
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Bo Song
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Luke P Lee
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Department of Bioengineering, Department of Electrical Engineering and Computer Science, University of California, Berkeley, California 94720, United States
- Institute of Quantum Biophysics, Department of Biophysics, Sungkyunkwan University, Suwon 16419, Korea
| | - Feng Zhang
- Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Oral Disease, Stomatology Hospital, School of Biomedical Engineering, Guangzhou Medical University, Guangzhou 511436, China
| |
Collapse
|
3
|
Ciacotich N, Kragh KN, Lichtenberg M, Tesdorpf JE, Bjarnsholt T, Gram L. In Situ Monitoring of the Antibacterial Activity of a Copper-Silver Alloy Using Confocal Laser Scanning Microscopy and pH Microsensors. GLOBAL CHALLENGES (HOBOKEN, NJ) 2019; 3:1900044. [PMID: 31692989 PMCID: PMC6827527 DOI: 10.1002/gch2.201900044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/27/2019] [Indexed: 06/10/2023]
Abstract
The antibacterial efficacy of a copper-silver alloy coating under conditions resembling build up of dry surface bacterial biofilms is successfully demonstrated according to US EPA test methods with a ≥99.9% reduction of test organisms over a 24 h period. A tailor-made confocal imaging protocol is designed to visualize in situ the killing of bacterial biofilms at the copper-silver alloy surface and monitor the kinetics for 100 min. The copper-silver alloy coating eradicates a biofilm of Gram-positive bacteria within 5 min while a biofilm of Gram-negative bacteria are killed more slowly. In situ pH monitoring indicates a 2-log units increase at the interface between the metallic surface and bacterial biofilm; however, the viability of the bacteria is not directly affected by this raise (pH 8.0-9.5) when tested in buffer. The OH- production, as a result of the interaction between the electrochemically active surface and the bacterial biofilm under environmental conditions, is thus one aspect of the contact-mediated killing of the copper-silver alloy coating and not the direct cause of the observed antibacterial efficacy. The combination of oxidation of bacterial cells, release of copper ions, and local pH raise characterizes the antibacterial activity of the copper-silver alloy-coated dry surface.
Collapse
Affiliation(s)
- Nicole Ciacotich
- Elplatek A/SBybjergvej 7DK‐3060EspergærdeDenmark
- Department of Biotechnology and BiomedicineTechnical University of DenmarkSøltofts Plads Bldg. 221DK‐2800Kgs LyngbyDenmark
| | - Kasper Nørskov Kragh
- Department of Immunology and MicrobiologyCosterton Biofilm CenterFaculty of Health and Medical SciencesUniversity of CopenhagenBlegdamsvej 3BDK‐2200Copenhagen NDenmark
| | - Mads Lichtenberg
- Department of Immunology and MicrobiologyCosterton Biofilm CenterFaculty of Health and Medical SciencesUniversity of CopenhagenBlegdamsvej 3BDK‐2200Copenhagen NDenmark
| | - Jens Edward Tesdorpf
- Department of Biotechnology and BiomedicineTechnical University of DenmarkSøltofts Plads Bldg. 221DK‐2800Kgs LyngbyDenmark
| | - Thomas Bjarnsholt
- Department of Clinical MicrobiologyRigshospitaletJuliane Maries vej 222100Copenhagen ØDenmark
| | - Lone Gram
- Department of Biotechnology and BiomedicineTechnical University of DenmarkSøltofts Plads Bldg. 221DK‐2800Kgs LyngbyDenmark
| |
Collapse
|