Long-term Effect of Silver Powder in vivo

Aoyagi, Hidekazu; Iwasaki, Shigeo

doi:10.4012/dmj.27.612

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…Aoyagi and Katagiri also reported the presence of silver and sulfur in connective tissues without host reaction. Using an original subcutaneous injection method, Aoyagi and Iwasaki have implanted silver particles of two different sizes (100 nm and 45 μm) and have observed the sulfuration of silver and histopathologic changes during a year. From the obtained results, they concluded that the decline of silver effect on the host was correlated with an increase in the sulfuration of silver.…”

Section: Biocompatibility Of Silvermentioning

confidence: 99%

Nanobio Silver: Its Interactions with Peptides and Bacteria, and Its Uses in Medicine

et al. 2013

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Introduction 4708 2. Peptides and Silver 4709 2.1. Silver Binding to Amino Acids and Peptides 4709 2.1.1. Silver Binding to Amino Acids − Theory 4709 2.1.2. Silver Binding to Amino Acids − Experiment 4711 2.1.3. Silver Binding to Peptides 4711 2.2. Natural Peptides Involved in Metal Detoxification 4714 2.3. Peptides for the Formation of Silver Nanostructures 4716 2.3.1. Biomineralization of Silver by Means of Peptides 4716 2.3.2. Peptides as Structure-Determining Scaffolds in the Synthesis of Silver Nanostructures 4721 3. Bacteria and Silver 4722 3.1. Antimicrobial Properties of Silver-Containing Compounds 4722 3.1.1. Interactions with the Bacterial Cell Wall 4722 3.1.2. Interactions with DNA, Enzymes, and Membrane Proteins 4724 3.1.3. Generation of Reactive Oxygen Species 4725 3.2. Bacterial Resistance Mechanisms against Ag(I) 4726 3.2.1. Accumulation and Storage-Based Mechanism 4726 3.2.2. Efflux Pump-Based Mechanism 4727 3.3. Synthesis of Silver Nanoparticles by Means of Bacteria 4728 4. Silver-Based Biomaterials in the Medical Field 4730 4.1. Types of Silver-Containing Biomaterials 4731 4.1.1. Metallic Silver Coatings and Silver's Antimicrobial Efficiency 4731 4.1.2. Silver-Containing Nanocomposites 4732 4.1.3. Silver-Containing Polymers 4732 4.1.4. Surface Modification with Ionic Silver Compounds 4734 4.1.5. Hybrid Silver Materials − Synergistic Effects 4734 4.2. Deposition Processes 4735 4.3. Mechanical Properties 4736 5. Biocompatibility of Silver 4737 5.1. General Routes of Silver Exposure 4737 5.2. Exposure to Silver-Containing Medical Products 4737 5.2.1. Dermal Contact: Burn Wound Dressings 4737 5.2.2. Bone Contact: Orthopedic and Dental Implants and Bone-Filling Products 4738 5.2.3. Blood Contact: Implants Introduced into the Vascular System 4739 5.3. Effects of Silver Exposure on Tissues and Organs 4739 5.3.1. Acute and Chronic Toxicity of Silver 4740 5.3.2. Tissue and Organ Damages 4740 5.3.3. Cellular Uptake of Silver 4741 5.4. Toxic Effects of Silver Nanoparticles 4741 5.5. Silver Detoxification 4742 5.5.1. Sequestration of Silver Ions 4742 5.5.2. Silver Ion Transport by ATPase P-type Efflux Pumps 4743 6. Conflicting Evidence 4744 7. Conclusions 4744 Author Information 4744 Corresponding Author 4744 Notes 4744 Biographies 4745 Acknowledgments 4746 References 4746

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Section: Biocompatibility Of Silvermentioning

confidence: 99%

Nanobio Silver: Its Interactions with Peptides and Bacteria, and Its Uses in Medicine

et al. 2013

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“…However, the accumulation of a high amount of silver in the human body can cause argyria or argyrosis, which results from the deposition of significant amounts of insoluble silver precipitates in the dermis of the skin and the cornea or conjunctiva of the eyes [ 27 , 28 ]. However, no pathological damage to tissues can be observed.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Microstructure and Silver Content on Degradation, Cytocompatibility, and Antibacterial Properties of Magnesium‐Silver Alloys In Vitro

Liu

Schade

Luthringer

et al. 2017

Oxidative Medicine and Cellular Longevity

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Implantation is a frequent procedure in orthopedic surgery, particularly in the aging population. However, it possesses the risk of infection and biofilm formation at the surgical site. This can cause unnecessary suffering to patients and burden on the healthcare system. Pure Mg, as a promising metal for biodegradable orthopedic implants, exhibits some antibacterial effects due to the alkaline pH produced during degradation. However, this antibacterial effect may not be sufficient in a dynamic environment, for example, the human body. The aim of this study was to increase the antibacterial properties under harsh and dynamic conditions by alloying silver metal with pure Mg as much as possible. Meanwhile, the Mg-Ag alloys should not show obvious cytotoxicity to human primary osteoblasts. Therefore, we studied the influence of the microstructure and the silver content on the degradation behavior, cytocompatibility, and antibacterial properties of Mg-Ag alloys in vitro. The results indicated that a higher silver content can increase the degradation rate of Mg-Ag alloys. However, the degradation rate could be reduced by eliminating the precipitates in the Mg-Ag alloys via T4 treatment. By controlling the microstructure and increasing the silver content, Mg-Ag alloys obtained good antibacterial properties in harsh and dynamic conditions but had almost equivalent cytocompatibility to human primary osteoblasts as pure Mg.

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“…Moreover, for the Ag/Ir/Ti* sample with a developed surface and effective galvanopair, an increased number of macrophages is already observed. Apparently, these are initial or local manifestations of argyrosis [67,68]. On the contrary, the Ag/Au/Ti sample, where the silver oxide phase predominates, showed a less intense and more uniform (almost linear) dissolution of silver.…”

Section: In Vivo and In Vitro Biocompatibilitymentioning

confidence: 92%

Vapor-Phase-Deposited Ag/Ir and Ag/Au Film Heterostructures for Implant Materials: Cytotoxic, Antibacterial and Histological Studies

Sergeevichev,

Dorovskikh,

Vikulova

et al. 2024

IJMS

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Using gas-phase deposition (Physical Vapor Deposition (PVD) and Metal Organic Chemical Vapor Deposition (MOCVD)) methods, modern implant samples (Ti alloy and CFR-PEEK polymer, 30% carbon fiber) were functionalized with film heterostructures consisting of an iridium or gold sublayer, on the surface of which an antibacterial component (silver) was deposited: Ag/Ir(Au)/Ti(CFR-PEEK). The biocidal effect of the heterostructures was investigated, the effect of the surface relief of the carrier and the metal sublayer on antibacterial activity was established, and the dynamics of silver dissolution was evaluated. It has been shown that the activity of Ag/Ir heterostructures was due to high Ag+ release rates, which led to rapid (2–4 h) inhibition of P. aeruginosa growth. In the case of Ag/Au type heterostructures, the inhibition of the growth of P. aeruginosa and S. aureus occurred more slowly (from 6 h), and the antibacterial activity appeared to be due to the contribution of two agents (Ag+ and Au+ ions). It was found, according to the in vitro cytotoxicity study, that heterostructures did not exhibit toxic effects (cell viability > 95–98%). An in vivo biocompatibility assessment based on the results of a morphohistological study showed that after implantation for a period of 30 days, the samples were characterized by the presence of a thin fibrous capsule without volume thickening and signs of inflammation.

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Long-term Effect of Silver Powder in vivo

Cited by 8 publications

References 27 publications

Nanobio Silver: Its Interactions with Peptides and Bacteria, and Its Uses in Medicine

Nanobio Silver: Its Interactions with Peptides and Bacteria, and Its Uses in Medicine

Influence of the Microstructure and Silver Content on Degradation, Cytocompatibility, and Antibacterial Properties of Magnesium‐Silver Alloys In Vitro

Vapor-Phase-Deposited Ag/Ir and Ag/Au Film Heterostructures for Implant Materials: Cytotoxic, Antibacterial and Histological Studies

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