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Esmailzadeh F, Taheri-Ledari R, Salehi MM, Zarei-Shokat S, Ganjali F, Mohammadi A, Zare I, Kashtiaray A, Jalali F, Maleki A. Bonding states of gold/silver plasmonic nanostructures and sulfur-containing active biological ingredients in biomedical applications: a review. Phys Chem Chem Phys 2024; 26:16407-16437. [PMID: 38807475 DOI: 10.1039/d3cp04131j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
As one of the most instrumental components in the architecture of advanced nanomedicines, plasmonic nanostructures (mainly gold and silver nanomaterials) have been paid a lot of attention. This type of nanomaterial can absorb light photons with a specific wavelength and generate heat or excited electrons through surface resonance, which is a unique physical property. In innovative biomaterials, a significant number of theranostic (therapeutic and diagnostic) materials are produced through the conjugation of thiol-containing ingredients with gold and silver nanoparticles (Au and Ag NPs). Hence, it is essential to investigate Au/Ag-S interfaces precisely and determine the exact bonding states in the active nanobiomaterials. This study intends to provide useful insights into the interactions between Au/Ag NPs and thiol groups that exist in the structure of biomaterials. In this regard, the modeling of Au/Ag-S bonding in active biological ingredients is precisely reviewed. Then, the physiological stability of Au/Ag-based plasmonic nanobioconjugates in real physiological environments (pharmacokinetics) is discussed. Recent experimental validation and achievements of plasmonic theranostics and radiolabelled nanomaterials based on Au/Ag-S conjugation are also profoundly reviewed. This study will also help researchers working on biosensors in which plasmonic devices deal with the thiol-containing biomaterials (e.g., antibodies) inside blood serum and living cells.
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Affiliation(s)
- Farhad Esmailzadeh
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Reza Taheri-Ledari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Mohammad Mehdi Salehi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Simindokht Zarei-Shokat
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Fatemeh Ganjali
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Adibeh Mohammadi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Iman Zare
- Research and Development Department, Sina Medical Biochemistry Technologies Co., Ltd, Shiraz 7178795844, Iran
| | - Amir Kashtiaray
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Farinaz Jalali
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
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Bouarfa M, Chebaibi M, Ez-Zahra Amrati F, Souirti Z, Saghrouchni H, El atki Y, Bekkouche K, Mourabiti H, Bari A, Giesy JP, Mohany M, Al-Rejaie SS, Aboul-Soud MAM, Bousta D. In vivo and in silico studies of the effects of oil extracted from Cannabis sativa L. seeds on healing of burned skin wounds in rats. Front Chem 2024; 12:1381527. [PMID: 38919274 PMCID: PMC11197104 DOI: 10.3389/fchem.2024.1381527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 05/06/2024] [Indexed: 06/27/2024] Open
Abstract
Introduction This study investigates the potential effects of cannabis seed oil (CSO) on the wound healing process. The aim was to assess the efficacy of CSO in treating skin wounds using an animal model and to explore its anti-inflammatory properties through in silico analysis. Methods Eighteen male albino Wistar rats, weighing between 200 and 250 g, were divided into three groups: an untreated negative control group, a group treated with the reference drug silver sulfadiazine (SSD) (0.01 g/mL), and a group treated topically with CSO (0.962 g/mL). The initial wound diameter for all groups was 1 cm. In silico studies were conducted using Maestro 11.5 to evaluate the anti-inflammatory effects of phytoconstituents against cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). Results CSO and SSD treatments led to a significant reduction (p <0.05) in the size of burned skin wounds by day 5, with contraction rates of 53.95% and 45.94%, respectively, compared to the untreated negative control group. By day 15, wounds treated with CSO and SSD had nearly healed, showing contraction rates of 98.8% and 98.15%, respectively. By day 20, the wounds treated with CSO had fully healed (100%), while those treated with SSD had almost completely healed, with a contraction rate of 98.97%. Histological examination revealed granulated tissue, neo-blood vessels, fibroblasts, and collagen fibers in wounds treated with CSO. In silico studies identified arachidic acid, γ-linolenic acid, and linolenic acid as potent inhibitors of COX-1 and COX-2. Serum biochemical parameters indicated no significant changes (p > 0.05) in liver and kidney function in rats treated with CSO, whereas a significant increase (p < 0.01) in ALAT level was observed in rats treated with SSD. Discussion The findings demonstrate that CSO has a promising effect on wound healing. The CSO treatment resulted in significant wound contraction and histological improvements, with no adverse effects on liver and kidney function.However, the study's limitations, including the small sample size and the need for detailed elucidation of CSO's mechanism of action, suggest that further research is necessary. Future studies should focus on exploring the molecular pathways and signaling processes involved in CSO's pharmacological effects.
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Affiliation(s)
- Mouna Bouarfa
- Laboratory of Biotechnology, Environment, Agri-Food and Health (LBEAS), Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Mohamed Chebaibi
- Ministry of Health and Social Protection, Higher Institute of Nursing Professions and Health Techniques, Fez, Morocco
- Biomedical and Translational Research Laboratory, Faculty of Medicine and Pharmacy of Fez, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Fatima Ez-Zahra Amrati
- Laboratory of Biotechnology, Environment, Agri-Food and Health (LBEAS), Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Zouhair Souirti
- Clinical Neurosciences Laboratory, Faculty of Medicine and Pharmacy of Fez, Sidi Mohamed Ben Abdellah University, Fez, Morocco
- Neurology Department, Sleep Center Hassan II University Hospital, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Hamza Saghrouchni
- Department of Biotechnology, Institute of Natural and Applied Sciences, Çukurova University, Adana, Türkiye
| | - Yassine El atki
- High Institute of Nursing Professions and Health Techniques, Fez, Morocco
| | - Khalid Bekkouche
- Laboratory of Agri-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Team of Protection and Valorization of Plant Resources (AgroBiotech Center, URL-CRNST 05), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Hajar Mourabiti
- Biomedical and Translational Research Laboratory, Faculty of Medicine and Pharmacy of Fez, Sidi Mohamed Ben Abdellah University, Fez, Morocco
- Service de Toxico-pharmacologie, Fès, Morocco
| | - Amina Bari
- Laboratory of Biotechnology, Environment, Agri-Food and Health (LBEAS), Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - John P. Giesy
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Environmental Sciences, Baylor University, Waco, TX, United States
- Department of Integrative Biology and Centre for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Mohamed Mohany
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Salim S. Al-Rejaie
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mourad A. M. Aboul-Soud
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Dalila Bousta
- Laboratory of Biotechnology, Environment, Agri-Food and Health (LBEAS), Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Hermans MHE. An Introduction to Burn Care: The Sequel. Adv Skin Wound Care 2024; 37:9-18. [PMID: 38117166 DOI: 10.1097/asw.0000000000000081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
GENERAL PURPOSE To review burn care, with an emphasis on burn-specific issues and treatment. TARGET AUDIENCE This continuing education activity is intended for physicians, physician assistants, nurse practitioners, and nurses with an interest in skin and wound care. LEARNING OBJECTIVES/OUTCOMES After participating in this educational activity, the participant will:1. Select the appropriate treatment guidelines for patients who have burn injuries.2. Identify common complications of major burns.3. Choose the recommended pharmacologic approaches to burn care.
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Affiliation(s)
- Michel H E Hermans
- Founder and President, Hermans Medical Consulting, Hoorn, the Netherlands
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Puente-Marin S, Hultman P, Ekstrand J, Nielsen JB, Havarinasab S. Secondary exposure to heavy metal in genetically susceptible mice leads to acceleration of autoimmune response. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104317. [PMID: 37984674 DOI: 10.1016/j.etap.2023.104317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 11/07/2023] [Accepted: 11/15/2023] [Indexed: 11/22/2023]
Abstract
Exposure to mercury (Hg) and silver (Ag) has been shown to induce autoimmune diseases in genetically susceptible rodents. Here, A.SW mice were initially exposed to HgCl2, AgNO3 or tap water (control) for 3 weeks. After 13 weeks of stoppage, all mice had secondary exposure to 203HgCl2. After secondary exposure, higher and earlier ANoA titers were observed in mice initially exposed to Hg or Ag compared to control. Further, mice initially exposed to Ag showed higher total IgG1 and IgG2a, Whole Body Retention and lymph nodes and spleen accumulation of Hg compared to mice initially exposed to Hg and controls. These findings showed an earlier and stronger immunological response in A.SW mice compared with control, following re-exposure to heavy metals indicating an immunological memory. Additionally, secondary exposure to a different heavy metal may aggravate the effects of exposure of at least one of the metals indicating cross-reactivity.
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Affiliation(s)
- Sara Puente-Marin
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Per Hultman
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Jimmy Ekstrand
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Jesper Bo Nielsen
- Department of Public Health, Research Unit for General Practice, University of Southern Denmark, Odense, Denmark
| | - Said Havarinasab
- Division of Clinical Chemistry and Pharmacology (KKF), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden.
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Deng Z, Zhao L, Li X, Wang CY, Zhou Y, Li M, Li Y, Fu X. Folium crataegi boosts skin regeneration for burn injury in rats through multiple ways. Biomed Pharmacother 2023; 167:115457. [PMID: 37690389 DOI: 10.1016/j.biopha.2023.115457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/31/2023] [Accepted: 09/05/2023] [Indexed: 09/12/2023] Open
Abstract
Appropriate topical dressings for burn treatments are important to accelerate skin wound recovery and prevent external infections. This study aimed to evaluate the effect and investigate the mechanism of folium crataegi (Crataegus pinnatifida Bge.) for the treatment of burn wounds, as well as to compare the therapeutic effects of aqueous extracts (HLW) and alcoholic extracts (HLE) from folium crataegi. The results demonstrated that both HLW and HLE groups exhibited a higher wound contraction rate than the silver sulfadiazine (SSD) ointment group. Moreover, HLW showed more significant wound repair effects than HLE. HLW significantly increased levels of EGF and FGF-2 in wound tissue, as well as TGF-β1, VEGF, CAT and IL-10 in serum. Folium crataegi extract, especially aqueous extracts, exerted good anti-inflammatory, anti-oxidant and anti-bacterial effects by upregulating the expression of lag3, txn1 and slpi, respectively. Folium crataegi extract significantly inhibits the expression of npas2, a key gene in the circadian rhythm pathway. In conclusion, this research illustrated that the folium crataegi extract, especially aqueous extracts, had better therapeutic effects on skin burns through multiple ways, possibly including a novel mechanism related to circadian rhythm pathway. These findings suggest that folium crataegi could be a valuable source of compounds for enhancing skin regeneration through multiple ways.
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Affiliation(s)
- Zhihong Deng
- Qingdao Academy of Chinese Medical Sciences Shandong University of Traditional Chinese Medicine, Qingdao Key Laboratory of Research in Marine Traditional Chinese Medicine, Qingdao Key Technology Innovation Center of Marine Traditional Chinese Medicine's Deep Development and Industrialization, Qingdao 266114, China; Marine Traditional Chinese Medicine Research Center, Key Laboratory of Marine Traditional Chinese Medicine in Shandong Universities, Shandong Engineering and Technology Research Center on Omics of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Lifeng Zhao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Xiuxue Li
- Qingdao Academy of Chinese Medical Sciences Shandong University of Traditional Chinese Medicine, Qingdao Key Laboratory of Research in Marine Traditional Chinese Medicine, Qingdao Key Technology Innovation Center of Marine Traditional Chinese Medicine's Deep Development and Industrialization, Qingdao 266114, China; Marine Traditional Chinese Medicine Research Center, Key Laboratory of Marine Traditional Chinese Medicine in Shandong Universities, Shandong Engineering and Technology Research Center on Omics of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, the Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yue Zhou
- Key Laboratory of Marine Drugs, the Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Mengfei Li
- Qingdao Academy of Chinese Medical Sciences Shandong University of Traditional Chinese Medicine, Qingdao Key Laboratory of Research in Marine Traditional Chinese Medicine, Qingdao Key Technology Innovation Center of Marine Traditional Chinese Medicine's Deep Development and Industrialization, Qingdao 266114, China; Marine Traditional Chinese Medicine Research Center, Key Laboratory of Marine Traditional Chinese Medicine in Shandong Universities, Shandong Engineering and Technology Research Center on Omics of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Yingfei Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Xianjun Fu
- Qingdao Academy of Chinese Medical Sciences Shandong University of Traditional Chinese Medicine, Qingdao Key Laboratory of Research in Marine Traditional Chinese Medicine, Qingdao Key Technology Innovation Center of Marine Traditional Chinese Medicine's Deep Development and Industrialization, Qingdao 266114, China; Marine Traditional Chinese Medicine Research Center, Key Laboratory of Marine Traditional Chinese Medicine in Shandong Universities, Shandong Engineering and Technology Research Center on Omics of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
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Liu X, Fan H, Meng Z, Wu Z, Gu R, Zhu X, Gan H, Dou G. Combined Silver Sulfadiazine Nanosuspension with Thermosensitive Hydrogel: An Effective Antibacterial Treatment for Wound Healing in an Animal Model. Int J Nanomedicine 2023; 18:679-691. [PMID: 36816331 PMCID: PMC9930683 DOI: 10.2147/ijn.s395004] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/01/2023] [Indexed: 02/12/2023] Open
Abstract
Introduction Silver sulfadiazine (AgSD) is widely used in burn wound treatment due to its broad-spectrum antibacterial activity. However, its application in wound healing is greatly hindered by the low solubility of AgSD particles and their cellular cytotoxicity. Herein, we studied the safety and in vivo efficacy of nano-sized silver sulfadiazine loaded in poloxamer thermosensitive hydrogel (NS/Gel). Methods In NS/Gel, silver sulfadiazine was prepared into silver sulfadiazine nanosuspension (NS) to improve the solubility and enhance its antibacterial activity, whereas the poloxamer thermosensitive hydrogel was selected as a drug carrier of NS to achieve slow drug release and reduced cytotoxicity. The acute toxicity of silver sulfadiazine nanosuspension was first evaluated in healthy mice, and its median lethal dose (LD50) was calculated by the modified Karber method. Furthermore, in vivo antibacterial effect and wound healing property of NS/Gel were evaluated on the infected deep second-degree burn wound mice model. Results The mortality ratio of mice was concentration-dependent, and the LD50 for silver sulfadiazine nanosuspension was estimated to be 252.1 mg/kg (230.8 to 275.4 mg/kg, 95% confidence limit). The in vivo dosages used for burn wound treatment (40-50 mg/kg) were far below LD50 (252.1 mg/kg). NS/Gel significantly accelerated wound healing in the deep second wound infection mice model, achieving > 85% wound contraction on day 14. Staphylococcus aureus in the wound region was eradicated after 7 days in NS/Gel group, while the bacterial colony count was still measurable in the control group. Histological analysis and cytokines measurement confirmed that the mice treated with NS/Gel exhibited well-organized epithelium and multiple keratinized cell layers compared to control groups with the modulated expression of IL-6, VEGF, and TGF-β. Conclusion The combination of silver sulfadiazine nanosuspension and thermo-responsive hydrogel has great potential in clinical burn wound treatment.
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Affiliation(s)
- Xiaoya Liu
- Department of Pharmacy, Shenzhen Children’s Hospital, Shenzhen, Guangdong Province, 518026, People’s Republic of China,Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Haiyang Fan
- Department of Thoracic Surgery, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong Province, 518102, People’s Republic of China
| | - Zhiyun Meng
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Zhuona Wu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Ruolan Gu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Xiaoxia Zhu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Hui Gan
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China
| | - Guifang Dou
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China,Correspondence: Guifang Dou; Hui Gan, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, 100850, People’s Republic of China, Tel +86 10 66932951, Fax +86 10 66931993, Email ;
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Yan J, Wang Q, Yang J, Rutter P, Xing M, Li B. Chemical Synthesis of Innovative Silver Nanohybrids with Synergistically Improved Antimicrobial Properties. Int J Nanomedicine 2023; 18:2295-2305. [PMID: 37163141 PMCID: PMC10164387 DOI: 10.2147/ijn.s405255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 04/12/2023] [Indexed: 05/11/2023] Open
Abstract
Background The wide use of antibiotics has created challenges related to antibiotic-resistant bacteria, which have been increasingly found in recent decades. Antibiotic resistance has led to limited choices of antibiotics. Multiple old antimicrobial agents have high antimicrobial properties toward bacteria, but they unfortunately also possess high toxicity toward humans. For instance, silver (Ag) compounds were frequently used to treat tetanus and rheumatism in the 19th century and to treat colds and gonorrhea in the early 20th century. However, the high toxicity of Ag has limited its clinical use. Purpose We aimed to reformulate Ag to reduce its toxicity toward human cells like osteoblasts and to optimize its antimicrobial properties. Results Ag, an old antimicrobial agent, was reformulated by hybriding nanomaterials of different dimensions, and silver nanoparticles (AgNPs) of controllable sizes (95-200 nm) and varying shapes (cube, snowflake, and sphere) were synthesized on carbon nanotubes (CNTs). The obtained AgNP-CNT nanohybrids presented significantly higher killing efficacy against Staphylococcus aureus (S. aureus) compared to AgNPs at the same molar concentration and showed synergism in killing S. aureus at 0.2 and 0.4 mM. AgNPs presented significant osteoblast toxicity; in contrast, AgNP-CNT nanohybrids demonstrated significantly enhanced osteoblast viability at 0.04-0.8 mM. The killing of S. aureus by AgNP-CNT nanohybrids was fast, occurring within 15 min. Conclusion Ag was successfully reformulated and Ag nanohybrids with various AgNP shapes on CNTs were synthesized. The nanohybrids presented significantly enhanced antimicrobial properties and significantly higher osteoblast cell viability compared to AgNPs, showing promise as an innovative antimicrobial nanomaterial for a broad range of biomedical applications.
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Affiliation(s)
- Jianhua Yan
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - Qifei Wang
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
- Spine Center, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Junlin Yang
- Spine Center, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Paige Rutter
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - Malcolm Xing
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T2N2, Canada
| | - Bingyun Li
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
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Hikima T, Ezaki H. Predicting the Safety of Ocular Iontophoresis Using Reconstructed Human Corneal Epithelial Cells. Biol Pharm Bull 2023; 46:1021-1023. [PMID: 37394633 DOI: 10.1248/bpb.b23-00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
We aimed to investigate eye damage caused by ocular iontophoresis (IP) based on an in vitro eye irritation test using a reconstructed human corneal cell. In this study, the LabCyte CORNEA-MODEL was selected as the reconstructed corneal cell. The test procedure was performed according to Test Guideline No.492 of the Organisation for Economic Co-operation and Development, which was partially revised for the IP. From the relationship between the cell viability of the cornea model and the electric field intensity [current density (mA/cm2) × application time (min)] of the IP, we predicted that the intensity values of 465 mA/cm2 × min and 930 mA/cm2 × min caused reversible eye irritation and irreversible eye damage, respectively. However, further studies are required to improve the accuracy and reproducibility of the prediction. This report provides essential knowledge on the clinical safety of ocular IP.
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Affiliation(s)
- Tomohiro Hikima
- Department of Biosciences and Bioinformatics, Kyushu Institute of Technology
| | - Haruhiko Ezaki
- Department of Biosciences and Bioinformatics, Kyushu Institute of Technology
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Materials Selection for Antifouling Systems in Marine Structures. Molecules 2022; 27:molecules27113408. [PMID: 35684344 PMCID: PMC9182286 DOI: 10.3390/molecules27113408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 11/16/2022] Open
Abstract
Fouling is the accumulation of unwanted substances, such as proteins, organisms, and inorganic molecules, on marine infrastructure such as pylons, boats, or pipes due to exposure to their environment. As fouling accumulates, it can have many adverse effects, including increasing drag, reducing the maximum speed of a ship and increasing fuel consumption, weakening supports on oil rigs and reducing the functionality of many sensors. In this review, the history and recent progress of techniques and strategies that are employed to inhibit fouling are highlighted, including traditional biocide antifouling systems, biomimicry, micro-texture and natural components systems, superhydrophobic, hydrophilic or amphiphilic systems, hybrid systems and active cleaning systems. This review highlights important considerations, such as accounting for the effects that antifouling strategies have on the sensing mechanism employed by the sensors. Additionally, due to the specialised requirements of many sensors, often a bespoke and tailored solution is preferential to general coatings or paints. A description of how both fouling and antifouling techniques affect maritime sensors, specifically acoustic sensors, is given.
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SiC- and Ag-SiC-Doped Hydroxyapatite Coatings Grown Using Magnetron Sputtering on Ti Alloy for Biomedical Application. COATINGS 2022. [DOI: 10.3390/coatings12020195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
SiC- and Ag-SiC-doped hydroxyapatite (HA) coatings were deposited via magnetron sputtering aiming at increased corrosion protection of Ti-10Nb-10Zr-5Ta alloy in simulated body fluid environment and superior mechanical properties compared to plain hydroxyapatite. The coatings had a total thickness of about 350 nm. The X ray diffraction patterns indicate that HA coatings are polycrystalline with a hexagonal structure and the addition of SiC determined the coating amorphization. All coatings presented a lower roughness compared to the Ti alloy and were hydrophilic. Ag-SiC-HA coating presented the best corrosion resistance and tribological parameters. All coatings were biocompatible, as ascertained via indirect cytocompatibility studies conducted on Vero cells.
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In vitro testing of silver-containing spacer in periprosthetic infection management. Sci Rep 2021; 11:17261. [PMID: 34446815 PMCID: PMC8390469 DOI: 10.1038/s41598-021-96811-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 08/02/2021] [Indexed: 12/03/2022] Open
Abstract
Deep infection is a serious complication in endoprosthetic surgery. In correlation to the patient local or systemic compromising factors conservative and surgical proceedings has to be evaluated. Systemic antibiotic therapy is the gold standard in infection management. Implanted silver-coated or silver-containing medical devices have been proven to their antimicrobial effectiveness since the 1990s by several investigators. The outcomes showed that long time implantation could cause damaging of the surrounding tissues, especially of adjacent nerves. The aim of our study was to evaluate the release of silver (I) ions from bone cement mixed with either nanosilver particles (AgNPs), different concentrations of silver sulfate (Ag2SO4) or from pure metallic silver strips. Therefore, we choose two methods: the first, called “static model”, was chosen to evaluate the maximal accumulative concentration of silver (I) ions, with the second, called “dynamic model”, we simulated a continuous reduction of the ions. In an additional test design, the different materials were evaluated for their antimicrobial activity using an agar gel diffusion assay. The outcome showed that neither the addition of 1% (w/w) nanosilver nor 0.1% silver sulfate (w/w) to polymethylmethacrylat bone cement has the ability to release silver (I) ions in a bactericidal/antifungal concentration. However, the results also showed that the addition of 0.5% (w/w) and 1% (w/w) silver sulfate (Ag2SO4) to bone cement is an effective amount of silver for use as a temporary spacer.
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Karimi H, Latifi NA, Mehrjerdi AZ, Jafarnejad B, Karimi AM. Histopathological Changes of Organs (Lungs, Liver, Kidney, and Brain) After Using Two Types of AgiCoat and Acticoat Nanosilver Dressings on Deep Second-Degree Burn in Rat. J Burn Care Res 2021; 41:141-150. [PMID: 31400763 DOI: 10.1093/jbcr/irz137] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Prevention of infections is a very important issue in treating the burn wounds. The nanosilver dressings have many promising advantages, but absorption of silver ions and its adverse effects to the body were always a question. The aim of this study was to compare Silver serum levels and acute toxic effects of nanosilver on histopathology of organs (lungs, liver, kidney, spleen, and brain) in two types of AgiCoat and Acticoat (nanosilver) dressings on second-degree deep burn in rat. This is an experimental study conducted in our animal laboratory. We divided 24 Sprague-Dawley male rats weighing 300 to 350 randomly into two groups. After anesthesia, a second deep-degree burn was made over dorsal skins of rats by standard method. For group A, Agicoat and, for group B, Acticoat dressings were used. The dressings were changed every 3 days with AgiCoat and Acticoat, respectively. After 14 days, we got blood samples and tissue samples taken from heart, liver, kidneys, spleen, lungs, and brain and a sample from dorsal skin of the rat for histopathological examinations. The results showed that the levels of serum silver in both groups were significantly higher than the standard level (1.22 part per million (PM); AgiCoat, P = .017; Acticoat, P = .000), but there was no significant difference between the groups (P = .551). Examination of the relationship between the level of serum silver and histopathological changes in liver showed that hepatotoxicity of AgiCoat was higher compared with Acticoat and the difference was significant (P = .002). There were no pathological changes in brain, kidneys, spleen, heart, and lungs. Wound healing was faster in Acticoat group. The nanosilver dressings can cause toxicity in liver but not in kidney, brain, spleen, heart, and lungs. Liver pathology and hepatotoxicity were more prominent in AgiCoat group. Wound healing was faster in Acticoat group.
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Affiliation(s)
- Hamid Karimi
- Hazrat Fatemeh Hospital, School of Medicine, Burn Research Center, Iran University of Medical Sciences
| | - Noor-Ahmad Latifi
- Hazrat Fatemeh Hospital, School of Medicine, Burn Research Center, Iran University of Medical Sciences
| | - Ali Zare Mehrjerdi
- Pathology Department, School of medicine, Iran University of Medical Sciences
| | - Babak Jafarnejad
- Plastic surgery Department, School of medicine, Hazrat Fatemeh Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Ali-Mohammad Karimi
- Pathology Department, School of medicine, Iran University of Medical Sciences
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13
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Biomimicry of microbial polysaccharide hydrogels for tissue engineering and regenerative medicine – A review. Carbohydr Polym 2020; 241:116345. [DOI: 10.1016/j.carbpol.2020.116345] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/13/2020] [Accepted: 04/17/2020] [Indexed: 12/17/2022]
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14
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Harma B, Gül M, Demircan M. The Efficacy of Five Different Wound Dressings on Some Histological Parameters in Children With Partial-Thickness Burns. J Burn Care Res 2020; 41:1179-1187. [DOI: 10.1093/jbcr/iraa063] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
An ideal dressing should ensure that the wound remains moist with exudates but not macerated. Currently, there is no dressing available to suit all wounds, at all stages of the healing process. Although silver-containing dressings are the gold standard for burn wound care, few high-level trials have been completed comparing the clinical utilities of these dressings. In our study, five different types of wound dressings: carboxymethyl cellulose hydrofiber dressing with ionized silver (CMCH-Ag), polyethylene-polyethylene terephthalate aqua fiber dressing with elementary silver (PPAF-Ag), calcium alginate (CA), calcium + zinc alginate (CZA), and 0.2% nitrofurazone-embedded (NF) gauze dressings were compared in regard to histopathological parameters. Children aged between 0 and 18 years with small or middle-sized partial-thickness burns that affected less than 30% of the total body surface area were included in this study. The study groups (CMCH-Ag, PPAF-Ag, CA, and CZA) and the control group (NF) were randomly attained. Wound healing was evaluated by punch biopsies on the 21st day. The thickness of the stratum corneum and the epithelium, the number of papillae, and the papillary length were calculated and compared. The histological parameters of healing, except the stratum corneum thickness, did not show any statistical significance among the groups (P > .05). The dressings that included silver, calcium, or zinc showed useful and similar effects in noninfective burn wounds when compared with nitrofurazone-only dressings. Thus, it may be concluded that silver-containing wound dressings should not be considered as the gold standard in noninfective partial-thickness burn wounds in children.
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Affiliation(s)
- Birsen Harma
- Department of Pediatric Surgery, Pediatric Burn Unit, Turgut Özal Medical Center, Inönü University, Malatya, Turkey
| | - Mehmet Gül
- Department of Histology and Embryology, Faculty of Medicine, Inönü University, Malatya, Turkey
| | - Mehmet Demircan
- Department of Pediatric Surgery, Pediatric Burn Unit, Turgut Özal Medical Center, Inönü University, Malatya, Turkey
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15
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Mass Spectrometry Reveals Complexing Properties of Modified PNP-Lariat Ether Containing Benzyl Derivative of (S)-Prolinamine. MOLECULES (BASEL, SWITZERLAND) 2019; 25:molecules25010136. [PMID: 31905750 PMCID: PMC6983243 DOI: 10.3390/molecules25010136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 12/23/2019] [Accepted: 12/27/2019] [Indexed: 11/16/2022]
Abstract
In the investigation presented here the synthesis of new lariat ether derivative obtained from the modification of tetrapyrrolidinyl-PNP-crown ether macrocycle is described. The polyheterotopic molecular coreceptor consisted of the replacement of chlorine atoms with an optically active (S)-(1-benzylpyrrolidin-2-yl) methanamine. The structure was confirmed by using elemental analysis, mass spectrometry, and NMR spectroscopy. This work covers results concerning the complexing properties of the new ligand towards Ag+, Cu2+, Co2+, Ni2+, and Zn2+ ions. The formation of non-covalent complexes of 1:1 stoichiometry with the Cu2+, Co2+, Ni2+, and Zn2+ ions have been confirmed by mass spectrometry. Due to the previous work and application possibilities, a large emphasis was put on the investigation of the complexation ability of lariat ether with silver (I) cation to determine stability constants by direct potentiometric method. In this case, the formation of four different forms of complexes AgL, Ag2L, Ag3L, and Ag4L has been proved. The observed unusual binding through the nitrogen atoms from the exocyclic substituents may provide the structural unit to build a new coordination polymers.
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16
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Li Y, Cao Y. The molecular mechanisms underlying mussel adhesion. NANOSCALE ADVANCES 2019; 1:4246-4257. [PMID: 36134404 PMCID: PMC9418609 DOI: 10.1039/c9na00582j] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 10/09/2019] [Indexed: 06/12/2023]
Abstract
Marine mussels are able to firmly affix on various wet surfaces by the overproduction of special mussel foot proteins (mfps). Abundant fundamental studies have been conducted to understand the molecular basis of mussel adhesion, where the catecholic amino acid, l-3,4-dihydroxyphenylalanine (DOPA) has been found to play the major role. These studies continue to inspire the engineering of novel adhesives and coatings with improved underwater performances. Despite the fact that the recent advances of adhesives and coatings inspired by mussel adhesive proteins have been intensively reviewed in literature, the fundamental biochemical and biophysical studies on the origin of the strong and versatile wet adhesion have not been fully covered. In this review, we show how the force measurements at the molecular level by surface force apparatus (SFA) and single molecule atomic force microscopy (AFM) can be used to reveal the direct link between DOPA and the wet adhesion strength of mussel proteins. We highlight a few important technical details that are critical to the successful experimental design. We also summarize many new insights going beyond DOPA adhesion, such as the surface environment and protein sequence dependent synergistic and cooperative binding. We also provide a perspective on a few uncharted but outstanding questions for future studies. A comprehensive understanding on mussel adhesion will be beneficial to the design of novel synthetic wet adhesives for various biomedical applications.
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Affiliation(s)
- Yiran Li
- Shenzhen Research Institute of Nanjing University Shenzhen 518057 China
- Department of Physics, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Soli State Microstructure, Nanjing University Nanjing 210093 China
| | - Yi Cao
- Shenzhen Research Institute of Nanjing University Shenzhen 518057 China
- Department of Physics, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Soli State Microstructure, Nanjing University Nanjing 210093 China
- Chemistry and Biomedicine Innovation Center, Nanjing University Nanjing 210093 China
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Pajares-Chamorro N, Shook J, Hammer ND, Chatzistavrou X. Resurrection of antibiotics that methicillin-resistant Staphylococcus aureus resists by silver-doped bioactive glass-ceramic microparticles. Acta Biomater 2019; 96:537-546. [PMID: 31302297 DOI: 10.1016/j.actbio.2019.07.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/24/2019] [Accepted: 07/09/2019] [Indexed: 11/16/2022]
Abstract
This work describes a novel strategy to combat methicillin-resistant Staphylococcus aureus (MRSA) via the reactivation of inert antibiotics. This strategy exploits a multifunctional system consisting of bioactive glass-ceramic microparticles with antibacterial properties combined with various antibiotics to kill MRSA. Specifically, sol-gel derived silver-doped bioactive glass-ceramic microparticles (Ag-BG) combined with antibiotics that MRSA resists such as oxacillin or fosfomycin, significantly decreased the viability of MRSA. Ag-BG also potentiated the activity of vancomycin on static bacteria, which are typically resistant to this antibiotic. Notably, the synergistic activity is restricted to cell-envelope acting antibiotics as Ag-BG supplementation did not increase the efficacy of gentamicin. Bacteria viability assays and electron microscopy images demonstrate that Ag-BG synergizes to restore antibacterial activity to antibiotics that MRSA resists. The low cytotoxicity previously studied against oral bacteria, together with the known regenerative properties presented in previous studies, and the unique antibacterial properties observed in this work when they are combined with antibiotics, make this multifunctional system a promising approach for healing infected tissue. STATEMENT OF SIGNIFICANCE: This study addresses a very significant issue in the field of antibiotic resistance presenting an innovative way to clear MRSA, by utilizing bioactive glass-ceramic microparticles in combination with antibiotics. Multifunctional glass-ceramic microparticles doped with silver ions (Ag-BG) have been previously observed to exhibit bioactive and antibacterial properties. In this study Ag-BG microparticles were observed to synergize with antibiotics restoring their sensitivity against MRSA. This research work presents a novel approach to resurrect ineffective antibiotics and render them effective against MRSA. Cytotoxicity to eukaryotic cells is not anticipated, as it has been previously observed that these microparticles can trigger hard and soft dental tissue regeneration, when they are utilized in certain concentrations. This study opens a new avenue in the treatment of multidrug resistance bacteria.
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Affiliation(s)
- Natalia Pajares-Chamorro
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - John Shook
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA
| | - Neal D Hammer
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA
| | - Xanthippi Chatzistavrou
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA.
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Ma DL, Wong SY, Kang TS, Ng HP, Han QB, Leung CH. Iridium(III)-based chemosensors for the detection of metal ions. Methods 2019; 168:3-17. [DOI: 10.1016/j.ymeth.2019.02.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 02/15/2019] [Indexed: 01/10/2023] Open
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19
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Bone ongrowth of a cementless silver oxide-containing hydroxyapatite-coated antibacterial acetabular socket. J Orthop Sci 2019; 24:658-662. [PMID: 30718042 DOI: 10.1016/j.jos.2018.12.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/05/2018] [Accepted: 12/20/2018] [Indexed: 02/09/2023]
Abstract
BACKGROUND The silver oxide-containing hydroxyapatite-coated socket (KYOCERA, Osaka, Japan) is a cementless antibacterial implant that has both the osteoconductivity of the HA and the antibacterial activity of silver. The silver oxide-containing hydroxyapatite coating was shown to have good osteoconductivity and new bone formation in vitro and in vivo. However, the histological bone ongrowth of this implant has not been proven in a clinical study. METHODS We analyzed bone ongrowth using two silver oxide-containing hydroxyapatite-coated sockets that were removed in revision total hip arthroplasty for recurrent dislocation. A histomorphometric analysis was performed using a scanning electron microscope (SEM) connected to a CCD camera and an elemental analysis was performed by energy-dispersive elemental spectrometry (EDS). RESULT A white structure thought to be osseous tissue was attached to the retrieved socket surface macroscopically, and histological bone ongrowth of the silver oxide-containing hydroxyapatite coating of the socket was confirmed by SEM. In addition, the presence of silver in the silver oxide-containing hydroxyapatite coating was confirmed in an elemental analysis by EDS. CONCLUSION Histologically, the silver oxide-containing hydroxyapatite-coated socket presented bone ongrowth in this clinical study.
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20
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Achar G, C. R. S, Patil SA, Małecki JG, Budagumpi S. Coumarin-substituted 1,2,4-triazole-derived silver(i) and gold(i) complexes: synthesis, characterization and anticancer studies. NEW J CHEM 2019. [DOI: 10.1039/c8nj02927j] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A series of coumarin-substituted 1,2,4-triazolium salts and their respective silver– and gold– N-heterocyclic carbene complexes have been reported. The complexes displayed promising anticancer activity with GI50 values of up to 0.354 μM and 8.5983 μM against MCF 7 and HT-29 cell lines, respectively.
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Affiliation(s)
- Gautam Achar
- Centre for Nano and Material Sciences
- Jain University
- Ramanagaram
- India
| | - Shahini C. R.
- Centre for Nano and Material Sciences
- Jain University
- Ramanagaram
- India
| | - Siddappa A. Patil
- Centre for Nano and Material Sciences
- Jain University
- Ramanagaram
- India
| | - Jan Grzegorz Małecki
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
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21
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Cao G, Lin H, Kannan P, Wang C, Zhong Y, Huang Y, Guo Z. Enhanced Antibacterial and Food Simulant Activities of Silver Nanoparticles/Polypropylene Nanocomposite Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14537-14545. [PMID: 30398355 DOI: 10.1021/acs.langmuir.8b03061] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
In this work, we synthesize dodecyl mercaptan-functionalized silver nanoparticles integrated with polypropylene nanocomposite (DM-AgNPs/PP) substrates by a simple in situ melt blending method. The formation and distribution of AgNPs are confirmed by UV-visible spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, and thermogravimetric analysis. The existence of DM-AgNPs in PP film substrate enhances the thermal degradation and crystallization properties. Further, the antimicrobial activity of as-synthesized DM-AgNPs/PP film substrate is studied using Gram-negative ( Escherichia coli) and Gram-positive ( Staphylococcus aureus) bacteria as model microbes, which displayed significantly enhanced bacteriostatic activities under optimized composition and experimental conditions. Interestingly, PP substrate with 0.4% DM-AgNPs exhibits drastically improved antibacterial property via the release of oxygen reactive species and Ag ion diffusion processes; thus, the inhibition rates of E. coli and S. aureus are obtained as 100 and 84.6%, respectively, which is higher than the conventional AgNPs. Finally, we demonstrate the migration study of Ag ions from the DM-AgNPs/PP film using different food simulant solutions by inductively coupled plasma-mass spectrometry analysis and the dissolved Ag ion content is estimated, which is a key prospect for the toxicity analysis. The overall Ag ion migration value is estimated between 1.8 and 24.5 μg/cm2 and displayed a lowest limit of Ag ion migration as 0.36 μg/cm2. Our work highlights the development of high performance nanocomposites as promising antibacterial and food simulant materials for biomedical and industrial applications.
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Affiliation(s)
- Guozhou Cao
- School of Materials Science and Chemical Engineering , Ningbo University , Ningbo 315211 , Zhejiang Province , P. R. China
- Ningbo Academy of Inspection and Quarantine , Ningbo 315012 , Zhejiang Province , P. R. China
| | - Han Lin
- School of Materials Science and Chemical Engineering , Ningbo University , Ningbo 315211 , Zhejiang Province , P. R. China
| | - Palanisamy Kannan
- College of Biological, Chemical Sciences and Engineering , Jiaxing University , Jiaxing 314001 , PR China
| | - Chun Wang
- Ningbo Academy of Inspection and Quarantine , Ningbo 315012 , Zhejiang Province , P. R. China
| | - Yingying Zhong
- Ningbo Academy of Inspection and Quarantine , Ningbo 315012 , Zhejiang Province , P. R. China
| | - Youju Huang
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Material Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , China
| | - Zhiyong Guo
- School of Materials Science and Chemical Engineering , Ningbo University , Ningbo 315211 , Zhejiang Province , P. R. China
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22
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Olenin AY, Lisichkin GV. Preparation and Use of Chemically Modified Noble Metal Nanoparticles. RUSS J APPL CHEM+ 2018. [DOI: 10.1134/s107042721809001x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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23
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Motley TA, Caporusso JM, Lange DL, Eichelkraut RA, Cargill DI, Dickerson JE. Clinical Outcomes for Diabetic Foot Ulcers Treated with Clostridial Collagenase Ointment or with a Product Containing Silver. Adv Wound Care (New Rochelle) 2018; 7:339-348. [PMID: 30374419 PMCID: PMC6203225 DOI: 10.1089/wound.2018.0784] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/18/2018] [Indexed: 02/03/2023] Open
Abstract
Objective: To compare outcomes of diabetic foot ulcers (DFUs) treated with clostridial collagenase ointment (CCO) or silver-containing products, both in combination with sharp debridement as needed. Approach: One hundred two subjects with qualifying DFUs were randomized to daily treatment with either CCO or a silver-containing product for 6 weeks followed by a 4 -week follow-up period. The primary outcome was the mean percent reduction in DFU area. A secondary outcome was the incidence of ulcer infections between groups. Results: At the end of treatment, the mean percent reduction in area from baseline of DFUs treated with CCO was 62% (p < 0.0001) and with silver was 40% (p < 0.0001). The difference between groups—22%—was not statistically significant (p = 0.071). Among ulcers closed by the end of treatment, the mean time to closure was 31.1 ± 9.0 days versus 37.1 ± 7.7 days, respectively (not statistically significant). There was a numerically greater incidence of target ulcer infections in the silver group (11, 21.6%) than in the CCO group (5, 9.8%; p = 0.208). No clinically relevant safety signals were identified in either group. Innovation: CCO treatment can progress a wound toward closure. Ulcer infection prophylaxis may not be sacrificed when treating DFU with CCO in lieu of silver-containing products. Conclusion: Both CCO and silver-containing products promote significant reduction in DFU area over 6 weeks of treatment with no clinically relevant safety concerns. Mean percent reduction in lesion area was numerically (22%) but not significantly greater with CCO compared to silver, as was time to ulcer closure, with an incidence of ulcer infection at least as low as for silver-containing products.
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Affiliation(s)
- Travis A. Motley
- Department of Orthopedics, John Peter Smith Hospital and Acclaim Physician Group, Fort Worth, Texas
| | | | | | | | | | - Jaime E. Dickerson
- Graduate School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, Texas
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24
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A novel in vitro metric predicts in vivo efficacy of inhaled silver-based antimicrobials in a murine Pseudomonas aeruginosa pneumonia model. Sci Rep 2018; 8:6376. [PMID: 29686296 PMCID: PMC5913254 DOI: 10.1038/s41598-018-24200-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/19/2018] [Indexed: 11/08/2022] Open
Abstract
To address the escalating problem of antimicrobial resistance and the dwindling antimicrobial pipeline, we have developed a library of novel aerosolizable silver-based antimicrobials, particularly for the treatment of pulmonary infections. To rapidly screen this library and identify promising candidates, we have devised a novel in vitro metric, named the “drug efficacy metric” (DEM), which integrates both the antibacterial activity and the on-target, host cell cytotoxicity. DEMs calculated using an on-target human bronchial epithelial cell-line correlates well (R2 > 0.99) with in vivo efficacy, as measured by median survival hours in a Pseudomonas aeruginosa pneumonia mouse model following aerosolized antimicrobial treatment. In contrast, DEMs derived using off-target primary human dermal fibroblasts correlate poorly (R2 = 0.0595), which confirms our hypothesis. SCC1 and SCC22 have been identified as promising drug candidates through these studies, and SCC22 demonstrates a dose-dependent survival advantage compared to sham treatment. Finally, silver-bearing biodegradable nanoparticles were predicted to exhibit excellent in vivo efficacy based on its in vitro DEM value, which was confirmed in our mouse pneumonia model. Thus, the DEM successfully predicted the efficacy of various silver-based antimicrobials, and may serve as an excellent tool for the rapid screening of potential antimicrobial candidates without the need for extensive animal experimentation.
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25
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Nandi SK, Shivaram A, Bose S, Bandyopadhyay A. Silver nanoparticle deposited implants to treat osteomyelitis. J Biomed Mater Res B Appl Biomater 2018; 106:1073-1083. [PMID: 28508595 PMCID: PMC5685947 DOI: 10.1002/jbm.b.33910] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 04/18/2017] [Accepted: 04/22/2017] [Indexed: 01/11/2023]
Abstract
In this study, electrolytically deposited strongly adherent silver nanoparticles on stainless-steel (SS) implants were used for in situ osteomyelitis treatment. Samples were heat treated to enhance adhesion of silver on 316 L SS. Ex vivo studies were performed to measure silver-release profiles from the 316 L SS screws inserted in equine cadaver bones. No change in the release profiles of silver ions were observed in vitro between the implanted screws and the control. In vivo studies were performed using osteomyelitic rabbit model with 3 mm diameter silver-deposited 316 L SS pins at two different doses of silver: high and low. Infection control ability of the pins for treating osteomyelitis in a rabbit model was measured using bacteriologic, radiographic, histological, and scanning electron microscopic studies. Silver-coated pins, especially high dose, offered a promising result to treat infection in animal osteomyelitis model without any toxicity to major organs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1073-1083, 2018.
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Affiliation(s)
- Samit Kumar Nandi
- Department of Veterinary Surgery and Radiology, West Bengal University of Animal and Fishery Sciences, Kolkata, 700037, India
| | - Anish Shivaram
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
| | - Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
| | - Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
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26
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Mesoporous silica-based bioactive glasses for antibiotic-free antibacterial applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 83:99-107. [DOI: 10.1016/j.msec.2017.11.003] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/23/2017] [Accepted: 11/09/2017] [Indexed: 01/23/2023]
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27
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Upadhyay PK, Marpu SB, Benton EN, Williams CL, Telang A, Omary MA. A Phosphorescent Trinuclear Gold(I) Pyrazolate Chemosensor for Silver Ion Detection and Remediation in Aqueous Media. Anal Chem 2018; 90:4999-5006. [DOI: 10.1021/acs.analchem.7b04334] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Prabhat K. Upadhyay
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Sreekar B. Marpu
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Erin N. Benton
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Corshai L. Williams
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Ameya Telang
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Mohammad A. Omary
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
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28
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Kaloğlu N, Özdemir İ, Günal S, Özdemir İ. Synthesis and antimicrobial activity of bulky 3,5‐di‐
tert
‐butyl substituent‐containing silver–N‐heterocyclic carbene complexes. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3803] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nazan Kaloğlu
- Faculty of Pharmacy, Department of Pharmaceutical ChemistryInönü University 44280 Malatya Turkey
- Catalysis Research and Application CenterInönü University 44280 Malatya Turkey
| | - İlknur Özdemir
- Faculty of Science and Arts, Department of ChemistryInönü University 44280 Malatya Turkey
| | - Selami Günal
- Faculty of Pharmacy, Department of Pharmaceutical MicrobiologyInönü University 44280 Malatya Turkey
| | - İsmail Özdemir
- Catalysis Research and Application CenterInönü University 44280 Malatya Turkey
- Faculty of Science and Arts, Department of ChemistryInönü University 44280 Malatya Turkey
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29
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Connell S, Li J, Durkes A, Freeman L. Application of Hyperosmotic Nanoemulsions in Wound Healing: Partial Thickness Injury Model in Swine. Adv Wound Care (New Rochelle) 2017; 6:153-165. [PMID: 28507786 DOI: 10.1089/wound.2016.0689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 04/25/2016] [Indexed: 01/22/2023] Open
Abstract
Objective: In this work, we introduce a novel hyperosmotic nanoemulsion (HNE) topical agent for use in wound healing. These topical emulsion complexes combine a lipophilic thymol nanoemulsion with a hyperosmotic saccharide matrix. This combination has been previously shown to possess synergistic antimicrobial activity against a host of common and drug-resistant pathogens in vitro. Approach: In this study, we present additional data to assess the safety and efficacy of these emulsions in a partial thickness injury model in swine. Ten wounds sized 2 × 3.5 cm were created in 18 pigs using an electrodermatome set at a depth of 0.76 mm. The wounds were subsequently contaminated with a cocktail of Escherichia coli, Staphylococcus aureus, Enterococcus faecalis, and Candida albicans at 5 × 107 total colony forming unit per wound. Treatments were subdivided in the control group and emulsion concentrations at 0.0%, 0.01%, 0.03%, and 0.063% thymol content. Longitudinal metrics for wound healing included rate of reepithelialization, wound bed color measurements, amount of wound exudate, wound swab culture data, and histological examination at 4, 7, and 14 days. The cosmetics of the healed wound were obtained at day 14 with three-dimensional photogrammetry. Results: Experimental results showed that HNE reduced the wound level bacteria count by ∼0.5-1 log versus controls after 24 h. The amount of pathogen reduction was weakly correlated to the concentration of the emulsion. In addition, all HNE groups maintained a moist wound environment and showed increased fibrin formation and improved hemostatic response. Innovation: No significant difference in the rate of reepithelialization or wound closure was found between treatment concentrations and control groups. HNE treatment did not demonstrate any adverse host tissue response. Conclusion: These results suggest HNE may be a candidate for reducing wound bacterial counts without compromising reepithelialization.
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Affiliation(s)
| | - Jianming Li
- Department of Basic Medical Sciences, Center for Paralysis Research, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana
| | - Abigail Durkes
- Comparative Pathobiology Department, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana
| | - Lynetta Freeman
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, Indiana
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana
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Synthesis, structural characterization, crystal structures and antibacterial potentials of coumarin–tethered N–heterocyclic carbene silver(I) complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.01.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Calderón-Jiménez B, Johnson ME, Montoro Bustos AR, Murphy KE, Winchester MR, Vega Baudrit JR. Silver Nanoparticles: Technological Advances, Societal Impacts, and Metrological Challenges. Front Chem 2017; 5:6. [PMID: 28271059 PMCID: PMC5318410 DOI: 10.3389/fchem.2017.00006] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/06/2017] [Indexed: 12/22/2022] Open
Abstract
Silver nanoparticles (AgNPs) show different physical and chemical properties compared to their macroscale analogs. This is primarily due to their small size and, consequently, the exceptional surface area of these materials. Presently, advances in the synthesis, stabilization, and production of AgNPs have fostered a new generation of commercial products and intensified scientific investigation within the nanotechnology field. The use of AgNPs in commercial products is increasing and impacts on the environment and human health are largely unknown. This article discusses advances in AgNP production and presents an overview of the commercial, societal, and environmental impacts of this emerging nanoparticle (NP), and nanomaterials in general. Finally, we examine the challenges associated with AgNP characterization, discuss the importance of the development of NP reference materials (RMs) and explore their role as a metrological mechanism to improve the quality and comparability of NP measurements.
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Affiliation(s)
- Bryan Calderón-Jiménez
- Material Measurement Laboratory, Chemical Sciences Division, National Institute of Standards and TechnologyGaithersburg, MD, USA
- Chemical Metrology Division, National Laboratory of MetrologySan Jose, Costa Rica
| | - Monique E. Johnson
- Material Measurement Laboratory, Chemical Sciences Division, National Institute of Standards and TechnologyGaithersburg, MD, USA
| | - Antonio R. Montoro Bustos
- Material Measurement Laboratory, Chemical Sciences Division, National Institute of Standards and TechnologyGaithersburg, MD, USA
| | - Karen E. Murphy
- Material Measurement Laboratory, Chemical Sciences Division, National Institute of Standards and TechnologyGaithersburg, MD, USA
| | - Michael R. Winchester
- Material Measurement Laboratory, Chemical Sciences Division, National Institute of Standards and TechnologyGaithersburg, MD, USA
| | - José R. Vega Baudrit
- National Laboratory of Nanotechnology, National Center of High TechnologySan Jose, Costa Rica
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In Vitro Parallel Evaluation of Antibacterial Activity and Cytotoxicity of Commercially Available Silver-Containing Wound Dressings. Plast Surg Nurs 2017; 35:203-11. [PMID: 26605826 DOI: 10.1097/psn.0000000000000096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE This study evaluated the in vitro antibacterial activity and cytotoxicity of various commercially available silver-containing dressings (Ag dressing). METHODS Biohesive Ag (hydrocolloid, silver sulfadiazine), Aquacel® Ag (nonwoven fabric, ionic silver [Ag]), Algisite™ Ag (nonwoven fabric, Ag), Mepilex® Ag (foam, silver sulfate), and PolyMem® Ag (foam, nanocrystalline silver) were tested for characteristics of Ag release, antibacterial activity, and cytotoxicity. The release of Ag was investigated in cell culture medium at immersion periods of 6, 24, and 48 hours. The antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa were accessed by a disc diffusion test. The cytotoxicity was evaluated using V79 cells, by an extraction method. RESULTS The cytotoxicity was not a monotonic function of the antibacterial activity among the Ag dressings and could not be simply explained by Ag-release properties. Biohesive Ag was regarded as a slow-release Ag dressing, showing the lowest cytotoxicity, while the antibacterial activity was classified as "strong" or "significant" against the two species of bacteria. Aquacel Ag and Algisite Ag showed higher antibacterial activity and cytotoxic effects, which were supported by the higher Ag release. Mepilex Ag showed the highest release of Ag, and the cytotoxicity was the highest among the Ag dressings. However, the antibacterial activity was classified as "significant" or "no activity" for P. aeruginosa and S. aureus, respectively. PolyMem Ag showed the lowest Ag release, and the antibacterial activity classified as "significant" or "no activity" for S. aureus and P. aeruginosa, respectively, whereas the cytotoxicity was similar to those of Aquacel Ag and Algisite Ag. CONCLUSION The efficacy and adverse effects of the Ag dressings revealed differences that should be considered by clinicians during wound management.
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Silver-Containing Hydroxyapatite Coating Reduces Biofilm Formation by Methicillin-Resistant Staphylococcus aureus In Vitro and In Vivo. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8070597. [PMID: 28105433 PMCID: PMC5220461 DOI: 10.1155/2016/8070597] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/01/2016] [Accepted: 12/07/2016] [Indexed: 11/17/2022]
Abstract
Biofilm-producing bacteria are the principal causes of infections associated with orthopaedic implants. We previously reported that silver-containing hydroxyapatite (Ag-HA) coatings exhibit high antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). In the present study, we evaluated the effects of Ag-HA coating of implant surfaces on biofilm formation. Titanium disks (14-mm diameter, 1-mm thickness), one surface of which was coated with HA or 0.5%-3.0% Ag-HA with a thermal spraying technique, were used. In vitro, the disks were inoculated with an MRSA suspension containing 4 × 105 CFU and incubated for 1-2 weeks. In vivo, MRSA-inoculated HA and 3% Ag-HA disks (8.8-10.0 × 108 CFU) were implanted subcutaneously on the back of rats for 1-7 days. All disks were subsequently stained with a biofilm dye and observed under a fluorescence microscope, and biofilm coverage rates (BCRs) were calculated. The BCRs on the Ag-HA coating were significantly lower than those on the HA coating at all time points in vitro (p < 0.05). Similar results were observed in vivo (p < 0.001) without argyria. Ag-HA coating reduced biofilm formation by MRSA in vitro and in vivo; therefore, Ag-HA coating might be effective for reducing implant-associated infections.
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Barbasz A, Oćwieja M, Walas S. Toxicological effects of three types of silver nanoparticles and their salt precursors acting on human U-937 and HL-60 cells. Toxicol Mech Methods 2016; 27:58-71. [DOI: 10.1080/15376516.2016.1251520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Anna Barbasz
- Institute of Biology, Pedagogical University of Cracow, Cracow, Poland
| | - Magdalena Oćwieja
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Cracow, Poland
| | - Stanisław Walas
- Faculty of Chemistry, Jagiellonian University, Cracow, Poland
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Pugnaloni A, Gabbanelli F, Mattioli-Belmonte M, Delfino A, Biagini G, Tucci MG, Ricotti G, Orlando F, Viticchi C, Fini M. Morpho-Structural Investigations of Biomaterials for Biocidal Activity. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391102031641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new wound dressing made of gelatin and Ag, was evaluated for the management of tissue reconstitution in rats. The gelatin–based dressing, with metabolic stimulation properties that favored the recovery of the skin was made of stiff sheets to supply the repairingtissue with mechanical support. The gelatin sheets enhanced the development of collagen fibers and subsequently cell proliferation at the level of stromal and vascular elements. A protocol based on the utilization of natural biomaterials in the presence of low concentrations of a biocidal was proposed which could control microbiocidal activities principally in burned and debilitated patients.
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Affiliation(s)
| | - F. Gabbanelli
- Istituto di Morfologia Umana Normale, Universitä di Ancona, Via Tronto 10/A, 60020 Ancona, Italy
| | - M. Mattioli-Belmonte
- Istituto di Morfologia Umana Normale, Universitä di Ancona, Via Tronto 10/A, 60020 Ancona, Italy
| | | | - G. Biagini
- Istituto di Morfologia Umana Normale, Universitä di Ancona, Via Tronto 10/A, 60020 Ancona, Italy
| | | | - G. Ricotti
- U.O Dermatologia, I.N.R.C.A, Via della Montagnola, 60100 Ancona, Italy
| | | | - C. Viticchi
- Centro Servizi e Biotecnologie I.N.R.C.A, Via Birarelli, 60100 Ancona, Italy
| | - M. Fini
- Chirurgia Sperimentale Istituti di Ricerca “Rizzoli”, Via Di Barbiano 1/10 Bologna, Italy
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First Clinical Experience With Thermal-Sprayed Silver Oxide-Containing Hydroxyapatite Coating Implant. J Arthroplasty 2016; 31:1498-503. [PMID: 26810376 DOI: 10.1016/j.arth.2015.12.034] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 11/24/2015] [Accepted: 12/14/2015] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Prosthetic joint infection is a serious complication of implant therapy. To prevent prosthetic joint infection, we previously reported the features of silver oxide-containing hydroxyapatite (Ag-HA), which was prepared by mixing silver (a metal with antimicrobial activity) with HA. In this study, we evaluated the potential issues of total hip arthroplasty (THA) with an Ag-HA-coated implant. METHODS We prepared an implant for THA that was coated with Ag-HA. In this study, the implant contained silver at a maximum quantity of 2.9 mg/implant. In this prospective interventional study, we performed THA with this implant in 20 patients and investigated the effects of silver. RESULTS Blood silver levels peaked at 2 weeks after THA and gradually decreased thereafter. The highest blood silver level recorded during the postoperative follow-up was 6.0 ng/mL, which was within the normal range. The Harris Hip Scores increased in all cases, and activities of daily living improved markedly after THA with Ag-HA-coated implants. Implant failure was absent on radiography. No adverse reaction to silver was noted, and argyria was not observed in any case. No patients have developed infection after surgery. CONCLUSION This is the first clinical study of Ag-HA-coated implants in THA. Our Ag-HA-coated implants markedly improved patients' activities of daily living without causing any adverse reactions attributable to silver in the human body. Ag-HA is expected to reduce postoperative infections and prevent decreased quality of life in patients undergoing prosthetic arthroplasty, thus leading to more favorable outcomes.
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Connell S, Li J, Durkes A, Zaroura M, Shi R. Nondermal irritating hyperosmotic nanoemulsions reduce treatment times in a contamination model of wound healing. Wound Repair Regen 2016; 24:669-78. [DOI: 10.1111/wrr.12436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 04/01/2016] [Indexed: 11/28/2022]
Affiliation(s)
| | - Jianming Li
- Medtric Biotech, LLCWest Lafayette Indiana
- Center for Paralysis Research, Purdue UniversityWest Lafayette Indiana47907
| | - Abigail Durkes
- Comparative Pathobiology Department, College of Veterinary MedicinePurdue UniversityWest Lafayette Indiana47907
| | | | - Riyi Shi
- Department of Basic Medical Sciences, College of Veterinary MedicinePurdue UniversityWest Lafayette Indiana47907
- Weldon School of Biomedical Engineering, College of EngineeringPurdue UniversityWest Lafayette Indiana
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Surface characterization and biological evaluation of silver-incorporated DLC coatings fabricated by hybrid RF PACVD/MS method. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:462-74. [DOI: 10.1016/j.msec.2016.03.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/25/2016] [Accepted: 03/02/2016] [Indexed: 02/04/2023]
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A novel hydroxyapatite film coated with ionic silver via inositol hexaphosphate chelation prevents implant-associated infection. Sci Rep 2016; 6:23238. [PMID: 26984477 PMCID: PMC4794646 DOI: 10.1038/srep23238] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 03/02/2016] [Indexed: 11/15/2022] Open
Abstract
Various silver-coated implants have been developed to prevent implant-associated infections, and have shown dramatic effects in vitro. However, the in vivo results have been inconsistent. Recent in vitro studies showed that silver exerts antibacterial activity by mediating the generation of reactive oxygen species in the presence of oxygen. To maintain its antibacterial activity in vivo, the silver should remain in an ionic state and be stably bound to the implant surface. Here, we developed a novel bacteria-resistant hydroxyapatite film in which ionic silver is immobilized via inositol hexaphosphate chelation using a low-heat immersion process. This bacteria-resistant coating demonstrated significant antibacterial activity both in vitro and in vivo. In a murine bioluminescent osteomyelitis model, no bacteria were detectable 21 days after inoculation with S. aureus and placement of this implant. Serum interleukin-6 was elevated in the acute phase in this model, but it was significantly lower in the ionic-silver group than the control group on day 2. Serum C-reactive protein remained significantly higher in the control group than the ionic-silver group on day 14. Because this coating is produced by a low-heat immersion process, it can be applied to complex structures of various materials, to provide significant protection against implant-associated infections.
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Huang R, McPhedran KN, Yang L, El-Din MG. Characterization and distribution of metal and nonmetal elements in the Alberta oil sands region of Canada. CHEMOSPHERE 2016; 147:218-229. [PMID: 26766359 DOI: 10.1016/j.chemosphere.2015.12.099] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 11/18/2015] [Accepted: 12/23/2015] [Indexed: 06/05/2023]
Abstract
This review covers the characterization and distribution of metals and nonmetals in the Alberta oil sands region (AOSR) of Canada. The development of the oil sands industry has resulted in the release of organic, metal and nonmetal contaminants via air and water to the AOSR. For air, studies have found that atmospheric deposition of metals in the AOSR decreased exponentially with distance from the industrial emission sources. For water, toxic metal concentrations often exceeded safe levels leading to the potential for negative impacts to the receiving aquatic environments. Interestingly, although atmospheric deposition, surface waters, fish tissues, and aquatic bird eggs exhibited increasing level of metals in the AOSR, reported results from river sediments showed no increases over time. This could be attributed to physical and/or chemical dynamics of the river system to transport metals to downstream. The monitoring of the airborne emissions of relevant nonmetals (nitrogen and sulphur species) was also considered over the AOSR. These species were found to be increasing along with the oil sands developments with the resultant depositions contributing to nitrogen and sulphur accumulations resulting in ecosystem acidification and eutrophication impacts. In addition to direct monitoring of metals/nonmetals, tracing of air emissions using isotopes was also discussed. Further investigation and characterization of metals/nonmetals emissions in the AOSR are needed to determine their impacts to the ecosystem and to assess the need for further treatment measures to limit their continued output into the receiving environments.
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Affiliation(s)
- Rongfu Huang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 2W2, Canada
| | - Kerry N McPhedran
- Department of Civil and Geological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A9, Canada.
| | - Lingling Yang
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, T6G 2G3, Canada
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 2W2, Canada
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Hashim AF, Alghuthaymi MA, Vasil’kov AY, Abd-Elsalam KA. Polymer Inorganic Nanocomposites: A Sustainable Antimicrobial Agents. ADVANCES AND APPLICATIONS THROUGH FUNGAL NANOBIOTECHNOLOGY 2016:265-289. [DOI: 10.1007/978-3-319-42990-8_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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42
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Wei W, Sun Y, Zhu M, Liu X, Sun P, Wang F, Gui Q, Meng W, Cao Y, Zhao J. Structural Insights and the Surprisingly Low Mechanical Stability of the Au–S Bond in the Gold-Specific Protein GolB. J Am Chem Soc 2015; 137:15358-61. [DOI: 10.1021/jacs.5b09895] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Feng Wang
- Elias
James Corey Institute of Biomedical Research, Wuxi Biortus Biosciences Co., Ltd, Jiangyin, 214437, China
| | | | - Wuyi Meng
- Elias
James Corey Institute of Biomedical Research, Wuxi Biortus Biosciences Co., Ltd, Jiangyin, 214437, China
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Abstract
There is increasing pressure from industry to use advanced wound care products and technologies. Many are very expensive but promise to reduce overall costs associated with wound care. Compelling anecdotal evidence is provided that inevitably shows wounds that failed all other treatments but responded positively to the subject product. Evidence-based medicine is the standard by which physician-scientists must make their clinical care decisions. In an attempt to provide policy makers with the most current evidence on advanced wound care products, the Department of Veteran Affairs conducted an Evidence-based Synthesis Program review of advanced wound care products. This paper suggests how to take this information and apply it to policy to drive evidence-based care to improve outcomes and fiduciary responsibility.
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Affiliation(s)
- Jeffrey M. Robbins
- Podiatry Service, Veterans Affairs Central Office, Podiatry Section, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH
| | - Jeremiah Dillon
- Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH
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Synthesis and characterization of Ag-containing calcium phosphates with various Ca/P ratios. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 53:111-9. [DOI: 10.1016/j.msec.2015.04.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 02/05/2015] [Accepted: 04/21/2015] [Indexed: 11/21/2022]
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Sari E, Dincel GC. Effect of piracetam and nimodipine on full-thickness skin burns in rabbits. Int Wound J 2015; 13:563-71. [PMID: 26192365 DOI: 10.1111/iwj.12478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 06/29/2015] [Indexed: 11/27/2022] Open
Abstract
The potential of several drugs for full-thickness skin burns has been investigated, but the treatment of such burns remains a challenge in plastic surgery. The present study was designed to determine the effect of systemic and topical administration of piracetam and nimodipine on full-thickness skin burn wound healing. A total of 36 New Zealand male rabbits were divided into six groups. Full-thickness skin burns were produced in all the groups, except the control group. Piracetam was administered systemically (piracetam-IV) and topically (piracetam-C) for 14 days, and nimodipine was administered systemically (nimodipine-IV) and topically (nimodipine-C) over the burn wounds for 14 days. The sham group underwent burn injury but was not administered any drug. After 21 days, gross examination and histopathological analysis were performed and the results were compared statistically. Nimodipine-C and nimodipine-IV had no effect on burn wound healing. However, both piracetam-IV and piracetam-C significantly enhanced the healing of the full-thickness skin burn wounds, although the latter was more effective, useful and practical in burn wound healing. The histopathological features of the wounds in the piracetam-C group were closer to those of the control group than those of the other groups. Piracetam-C rather than piracetam-IV may promote full-thickness burn wound healing in rabbits.
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Affiliation(s)
- Elif Sari
- Department of Plastic, Reconstructive and Aesthetic Surgery, Kirikkale University Faculty of Medicine, Kirikkale, Turkey
| | - Gungor C Dincel
- Gumushane University, Siran Mustafa Beyaz Vocational School, Laboratory and Veterinary Health Program, Gumushane, Turkey
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Dong Z, Wang Y, Wang C, Xu H, Guan L, Li Z, Li F. Self-Assembly of the Second Transmembrane Domain of hCtr1 in Micelles and Interaction with Silver Ion. J Phys Chem B 2015; 119:8302-12. [PMID: 26061257 DOI: 10.1021/acs.jpcb.5b03744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human copper transporter 1 (hCtr1) transports copper and silver by a homotrimer. The protein contains three transmembrane domains in which the second transmembrane domain (TMD2) is a key component lining the central pore of the trimer. The MXXXM motif in the C-terminal end of TMD2 plays a significant role in the function of hCtr1. In this study, we characterized the structure and assembly of isolated TMD2 of hCtr1 in sodium dodecyl sulfate (SDS) micelles and the interaction of the micelle-bound peptide with silver ion using nuclear magnetic resonance, circular dichroism, isothermal titration calorimetry and electrophoresis techniques. We detected the formation of a trimer of the isolated hCtr1-TMD2 in SDS micelles and the binding of the trimer to Ag(I) by a chemical stoichiometry of 3:2 of peptide:Ag(I). We showed that either an intensive pretreatment of the TMD2 peptide by 1,1,1,3,3,3-hexafluoro-2-propanol solvent or a conversion from methionine to leucine in the MXXXM motif changes the aggregation structure of the peptide and decreases the binding affinity by 1 order of magnitude. Our results suggest that the intrinsic interaction of the second transmembrane domain itself may be closely associated with the formation of hCtr1 pore in cellular membranes, and two methionine residues in the MXXXM motif may be important for TMD2 both in the trimeric assembly and in a higher-affinity binding to Ag(I).
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Affiliation(s)
- Zhe Dong
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China
| | - Yunrui Wang
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China
| | - Chunyu Wang
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China
| | | | - Liping Guan
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China
| | | | - Fei Li
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, PR China
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Aweda TA, Zhang S, Mupanomunda C, Burkemper J, Heo GS, Bandara N, Lin M, Cutler CS, Cannon CL, Youngs W, Wooley KL, Lapi SE. Investigating the pharmacokinetics and biological distribution of silver-loaded polyphosphoester-based nanoparticles using (111) Ag as a radiotracer. J Labelled Comp Radiopharm 2015; 58:234-41. [PMID: 25952472 PMCID: PMC4457551 DOI: 10.1002/jlcr.3289] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 03/24/2015] [Indexed: 11/09/2022]
Abstract
Purified (111) Ag was used as a radiotracer to investigate silver loading and release, pharmacokinetics, and biodistribution of polyphosphoester-based degradable shell crosslinked knedel-like (SCK) nanoparticles as a comparison to the previously reported small molecule, N-heterocyclic silver carbene complex analog (SCC1) for the delivery of therapeutic silver ions in mouse models. Biodistribution studies were conducted by aerosol administration of (111) Ag acetate, [(111) Ag]SCC1, and [(111) Ag]SCK doses directly into the lungs of C57BL/6 mice. Nebulization of the (111) Ag antimicrobials resulted in an average uptake of 1.07 ± 0.12% of the total aerosolized dose given per mouse. The average dose taken into the lungs of mice was estimated to be 2.6 ± 0.3% of the dose inhaled per mouse for [(111) Ag]SCC1 and twice as much dose was observed for the [(111) Ag]SCKs (5.0 ± 0.3% and 5.9 ± 0.8% for [(111) Ag]aSCK and [(111) Ag]zSCK, respectively) at 1 h post administration (p.a.). [(111) Ag]SCKs also exhibited higher dose retention in the lungs; 62-68% for [(111) Ag]SCKs and 43% for [(111) Ag]SCC1 of the initial 1 h dose were observed in the lungs at 24 h p.a.. This study demonstrates the utility of (111) Ag as a useful tool for monitoring the pharmacokinetics of silver-loaded antimicrobials in vivo.
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Affiliation(s)
- Tolulope A. Aweda
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Shiyi Zhang
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255
| | - Chiedza Mupanomunda
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Jennifer Burkemper
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Gyu Seong Heo
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255
| | - Nilantha Bandara
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Mai Lin
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Cathy S. Cutler
- University of Missouri, Research Reactor Center, 1513 Research Park Drive, Columbia, MO 65211
| | - Carolyn L. Cannon
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, 407 Reynolds Medical Building, College Station, TX 77843-1114
| | - Wiley Youngs
- Department of Chemistry, University of Akron, Akron, OH 44325-3601
| | - Karen L. Wooley
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255
| | - Suzanne E. Lapi
- Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
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Evaluation of osseous integration of PVD-silver-coated hip prostheses in a canine model. BIOMED RESEARCH INTERNATIONAL 2015; 2015:292406. [PMID: 25695057 PMCID: PMC4324895 DOI: 10.1155/2015/292406] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 12/09/2014] [Indexed: 12/14/2022]
Abstract
Infection associated with biomaterials used for orthopedic prostheses remains a serious complication in orthopedics, especially tumor surgery. Silver-coating of orthopedic (mega)prostheses proved its efficiency in reducing infections but has been limited to surface areas exposed to soft tissues due to concerns of silver inhibiting osseous integration of cementless stems. To close this gap in the bactericidal capacity of silver-coated orthopedic prostheses extension of the silver-coating on surface areas intended for osseous integration seems to be inevitable. Our study reports about a PVD- (physical-vapor-deposition-) silver-coated cementless stem in a canine model for the first time and showed osseous integration of a silver-coated titanium surface in vivo. Radiological, histological, and biomechanical analysis revealed a stable osseous integration of four of nine stems implanted. Silver trace elemental concentrations in serum did not exceed 1.82 parts per billion (ppb) and can be considered as nontoxic. Changes in liver and kidney functions associated with the silver-coating could be excluded by blood chemistry analysis. This was in accordance with very limited metal displacement from coated surfaces observed by laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) 12 months after implantation. In conclusion our results represent a step towards complete bactericidal silver-coating of orthopedic prostheses.
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Unosson E, Rodriguez D, Welch K, Engqvist H. Reactive combinatorial synthesis and characterization of a gradient Ag-Ti oxide thin film with antibacterial properties. Acta Biomater 2015; 11:503-10. [PMID: 25281786 DOI: 10.1016/j.actbio.2014.09.048] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 09/22/2014] [Accepted: 09/26/2014] [Indexed: 01/12/2023]
Abstract
The growing demand for orthopedic and dental implants has spurred researchers to develop multifunctional coatings, combining tissue integration with antibacterial features. A possible strategy to endow titanium (Ti) with antibacterial properties is by incorporating silver (Ag), but designing a structure with adequate Ag(+) release while maintaining biocompatibility has been shown difficult. To further explore the composition-structure-property relationships between Ag and Ti, and its effects against bacteria, this study utilized a combinatorial approach to manufacture and test a single sample containing a binary Ag-Ti oxide gradient. The sample, sputter-deposited in a reactive (O2) environment using a custom-built combinatorial physical vapor deposition system, was shown to be effective against Staphylococcus aureus with viability reductions ranging from 17 to above 99%, depending on the amount of Ag(+) released from its different parts. The Ag content along the gradient ranged from 35 to 62 wt.%, but it was found that structural properties such as varied porosity and degree of crystallinity, rather than the amount of incorporated Ag, governed the Ag(+) release and resulting antibacterial activity. The coating also demonstrated in vitro apatite-forming abilities, where structural variety along the sample was shown to alter the hydrophilic behavior, with the degree of hydroxyapatite deposition varying accordingly. By means of combinatorial synthesis, a single gradient sample was able to display intricate compositional and structural features affecting its biological response, which would otherwise require a series of coatings. The current findings suggest that future implant coatings incorporating Ag as an antibacterial agent could be structurally enhanced to better suit clinical requirements.
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50
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An In Vivo Comparison of Commonly Used Topical Antimicrobials on Skin Graft Healing After Full-Thickness Burn Injury. J Burn Care Res 2015; 36:e47-54. [DOI: 10.1097/bcr.0000000000000072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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