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Abdulsada ZK, Kibbee R, Princz J, Örmeci B. Impact of Silver and Copper Oxide Nanoparticles on Anaerobic Digestion of Sludge and Bacterial Community Structure. NANOMATERIALS (BASEL, SWITZERLAND) 2025; 15:236. [PMID: 39940212 PMCID: PMC11820454 DOI: 10.3390/nano15030236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2024] [Revised: 01/27/2025] [Accepted: 01/29/2025] [Indexed: 02/14/2025]
Abstract
The effect of metal nanoparticles on the anaerobic digestion of sludge and the sludge bacterial community are still not well-understood, and both improvements and inhibitions have been reported. This study investigated the impact of 2, 10, and 30 mg/g TS silver and copper oxide nanoparticles (AgNPs and CuONPs) on the mesophilic anaerobic digestion of sludge and the bacterial community structure. The reactors were monitored for changes in tCOD, sCOD, TS, VS, biogas generation, and cell viability. Also, the relative abundance and taxonomic distribution of the bacterial communities were analyzed at the phylum and genus levels, including the genera involved in anaerobic digestion. Both AgNPs and CuONPs exhibited some inhibition on anaerobic digestion of sludge and biogas generation, and the inhibition was more evident at higher concentrations. CuONPs had a stronger inhibitory effect compared to AgNPs. After the introduction of AgNPs and CuONPs, cell viability initially decreased over the first two weeks but recovered after that. At high concentrations, AgNPs and CuONPs decreased the overall bacterial diversity, and inhibited the dominant bacterial species, allowing those in less abundance to flourish. The relative abundance of the bacteria responsible for hydrolysis and acidogenesis increased and the relative abundance of acetogenic bacteria decreased with higher AgNP and CuONP concentrations. The majority of the parameters measured for monitoring the anaerobic digestion performance and bacterial community were not statistically significant at 2 mg/g TS of AgNPs and CuONPs, which represents naturally present concentrations in wastewater sludge that are below the USEPA ceiling concentration limits.
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Affiliation(s)
- Zainab K. Abdulsada
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada; (Z.K.A.); (R.K.)
| | - Richard Kibbee
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada; (Z.K.A.); (R.K.)
| | - Juliska Princz
- Environment and Climate Change Canada, 335 River Road South, Ottawa, ON K1V 1C7, Canada;
| | - Banu Örmeci
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada; (Z.K.A.); (R.K.)
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Doğan Ulu Ö, Kuruçay A, Gümüşhan İY, Özdemir N, Ateş B, Özdemir İ. Design, synthesis, characterization, and biological activities of novel Ag(I)-NHC complexes based on 1,3-dioxane ligand. J Inorg Biochem 2024; 261:112719. [PMID: 39236445 DOI: 10.1016/j.jinorgbio.2024.112719] [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: 06/10/2024] [Revised: 08/21/2024] [Accepted: 08/30/2024] [Indexed: 09/07/2024]
Abstract
Herein, a series of new Ag(I)-NHC complexes containing 1,3-dioxane group were synthesized by the direct reaction of Ag2O and benzimidazolium salts in light-free conditions. All Ag(I)-NHC complexes were spectrally characterized using 1H, 13C NMR, FT-IR, LC-MS, and elemental analysis. Additionally, the structures of compounds 1a and 1e were elucidated by the single X-ray diffraction techniques. Further, the synthesized Ag(I)-NHC complexes were evaluated for cytotoxicity study on the L-929 cells and the anticancer activity against the HCT 116 and MCF-7 cancer cell lines. Notably, 1a showed significant anticancer activity against HCT 116 with an IC50 of 6.37 ± 0.92 μg/mL compared to cisplatin (IC50 = 36.75 ± 1.76 μg/mL). 1c (IC50 = 3.21 ± 1.96 μg/mL) and 1e (IC50 = 3.72 ± 1.12 μg/mL) exhibited significant anticancer activity against MCF-7 cells and was similar to cisplatin (IC50 = 32.17 ± 2.85 μg/mL). Meanwhile, 1a and 1e displayed the highest selectivity index. Most importantly, the cell viability test showed that 1e induced neglectable cytotoxicity (IC50 = 36.38 ± 2.27 μg/mL) toward L-929 and was similar to cisplatin (IC50 = 36.11 ± 2.09 μg/mL). The anticancer activities of Ag(I)-NHC complexes vary depending on the substituent group of the silver complex and the cell line type. Moreover, the inhibitory mechanism of 1e was not dependent on caspase-associated apoptosis initiated by the lysosomal-mitochondrial pathway. Taken together, we conclude that this work provides a simple and rapid protocol for the synthesis of Ag(I)-NHC complexes and the featured Ag(I)-NHC complexes have an anticancer drug potential for biomedical applications.
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Affiliation(s)
- Öznur Doğan Ulu
- Catalysis Research and Application Center, İnönü University, 44280 Malatya, Türkiye; Scientific And Technological Research Center, İnönü University, 44280 Malatya, Türkiye
| | - Ali Kuruçay
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye
| | | | - Namık Özdemir
- Department of Physics, Faculty of Science, Ondokuz Mayıs University, 55139 Samsun, Türkiye
| | - Burhan Ateş
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye
| | - İsmail Özdemir
- Catalysis Research and Application Center, İnönü University, 44280 Malatya, Türkiye; Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye; Drug Application and Research Center, İnönü University, 44280 Malatya, Türkiye.
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Liang K, Liu Y, Jiang F. Analysis of therapeutic effect of silver-based dressings on chronic wound healing. Int Wound J 2024; 21:e70006. [PMID: 39087750 PMCID: PMC11292664 DOI: 10.1111/iwj.70006] [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: 03/28/2024] [Revised: 07/03/2024] [Accepted: 07/08/2024] [Indexed: 08/02/2024] Open
Abstract
Chronic wounds are susceptible to bacterial infections and at high risk of developing antibiotic-resistant bacterial infections. Silver is an antimicrobial by targeting almost all types of bacteria in chronic wounds to reduce the bacterial load in the infected area and further facilitate the healing process. This study focused on exploring whether silver-based dressings were superior to non-silver dressings in the treatment of chronic wounds. PubMed, Web of Science and Embase were comprehensively searched from inception to March 2024 for randomized clinical trials and observational studies. The endpoints in terms of wound healing rate, complete healing time, reduction on wound surface area and wound infection rate were analysed using Review Manager 5.4 software. A total of 15 studies involving 5046 patients were eventually included. The results showed that compared with patients provided with non-silver dressings, patients provided with silver-based dressings had higher wound healing rate (OR: 1.43, 95% CI: 1.10-1.85, p = 0.008), shorter complete healing time (MD: -0.96, 95% CI: -1.08 ~ -0.85, p < 0.00001) and lower wound infection rate (OR: 0.56, 95% CI: 0.40-0.79, p = 0.001); no significant difference in the reduction on wound surface area (MD: 12.41, 95% CI: -19.59-44.40, p = 0.45) was found. These findings suggested that the silver-based dressings were able to enhance chronic wound healing rate, shorten the complete healing time and reduce wound infection rate, but had no significant improvement in the reduction on wound surface area. Large-scale and rigorous studies are required to confirm the beneficial effects of silver-based dressings on chronic wound healing.
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Affiliation(s)
- Kaitao Liang
- Trauma Orthopedics DepartmentThe Affiliated Panyu Central Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Yan Liu
- Intensive Care MedicineZhongshan Hospital of Traditional Chinese MedicineZhongshanChina
| | - Fengting Jiang
- Trauma Orthopedics DepartmentThe Affiliated Panyu Central Hospital of Guangzhou Medical UniversityGuangzhouChina
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Yoosefian M, Sabaghian H. Silver nanoparticle-based drug delivery systems in the fight against COVID-19: enhancing efficacy, reducing toxicity and improving drug bioavailability. J Drug Target 2024; 32:794-806. [PMID: 38742854 DOI: 10.1080/1061186x.2024.2356147] [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: 01/20/2024] [Revised: 03/26/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Nanoparticles (NPs) have played a pivotal role in various biomedical applications, spanning from sensing to drug delivery, imaging and anti-viral therapy. The therapeutic utilisation of NPs in clinical trials was established in the early 1990s. Silver nanoparticles (AgNPs) possess anti-microbial, anti-cancer and anti-viral properties, which make them a possible anti-viral drug to combat the COVID-19 virus. Free radicals and reactive oxygen species are produced by AgNPs, which causes apoptosis induction and prevents viral contamination. The shape and size of AgNPs can influence their interactions and biological activities. Therefore, it is recommended that silver nanoparticles (AgNPs) be used as a valuable tool in the management of COVID-19 pandemic. These nanoparticles possess strong anti-microbial properties, allowing them to penetrate and destroy microbial cells. Additionally, the toxicity level of nanoparticles depends on the administered dose, and surface modifications are necessary to reduce toxicity, preventing direct interaction between metal surfaces and cells. By utilising silver nanoparticles, drugs can be targeted to specific areas in the body. For example, in the case of COVID-19, anti-viral drugs can be stimulated as nanoparticles in the lungs to accelerate disease recovery. Nanoparticle-based systems have the capability to transport drugs and treat specific body parts. This review offers an examination of silver nanoparticle-based drug delivery systems for combatting COVID-19, with the objective of boosting the bioavailability of existing medications, decreasing their toxicity and raising their efficiency.
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Affiliation(s)
- Mehdi Yoosefian
- Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran
| | - Hanieh Sabaghian
- Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran
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Isbel SR, Patil SA, Bugarin A. NHCs silver complexes as potential antimicrobial agents. Inorganica Chim Acta 2024; 563:121899. [PMID: 38292701 PMCID: PMC10824532 DOI: 10.1016/j.ica.2023.121899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
NHCs (N-heterocyclic carbenes) are generally used as organic ligands that can coordinate with metal ions like silver to form stable complexes. These complexes have shown enhanced antimicrobial properties compared to silver alone. This document provides an overview of the reported NHC-based silver derivatives (acetates, chlorides, bromides, and iodides) who possess antimicrobial activity. This review covers articles published between the first report (2006) and 2023.
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Affiliation(s)
- Stephen R. Isbel
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, FL 33965, USA
| | - Siddappa A. Patil
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, FL 33965, USA
- Centre for Nano & Material Sciences, Jain University, Jain Global Campus, Bangalore 562112, Karnataka, India
| | - Alejandro Bugarin
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, FL 33965, USA
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Lee GKY, Tan MN, Gao X, Wee HL, Lai BWP, Hong CHL, Hu S. Acceptance of silver diamine fluoride use in community dwelling older adults, nursing home residents, and caregivers. J Dent 2024; 141:104819. [PMID: 38128821 DOI: 10.1016/j.jdent.2023.104819] [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: 11/17/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023] Open
Abstract
OBJECTIVES To compare the level of acceptance of silver diamine fluoride (SDF) treatment between different functional groups of older adults aged 65-years-old and above. METHODS Three groups were recruited representing functionally-independent ("Community dwelling"), frail ("Nursing home"), and functionally-dependent older adults ("Caregiver": proxy respondent involved in caring for an older adult of all functional levels). Participants viewed a video on SDF and an interviewer-led questionnaire collected demographics, dental experience and perception on SDF use. RESULTS The study recruited 201 participants (100 "Community dwelling", 51 "Nursing home", 50 "Caregiver"). Overall, 73 % of participants were accepting of SDF treatment. Those in the "Community dwelling" group were most accepting (85 %), followed by the "Nursing home" group (61 %) and "Caregiver" group (60 %) (p<0.001). Participants were more accepting of SDF use on posterior (73 %) compared to anterior teeth (46 %). They were more accepting when SDF was presented as a treatment to avoid infection and pain (87 %), and general anesthesia (78 %). In a regression analysis, "Nursing home" and "Caregiver" participants were three times less likely to accept SDF (OR 0.27 [95 % CI: 0.13 to 0.60], and OR 0.27 [95 % CI: 0.12 to 0.58] respectively) compared to "Community dwelling" participants. After adjusting for other factors, only the "Caregiver" group remained significant (Adjusted OR 0.32 [95 % CI: 0.13 to 0.78]). CONCLUSIONS Older adults were accepting of SDF and this treatment modality has the potential to be a routine treatment option in dental caries management in this population. However, this was less certain among frail and functionally dependent older adults. CLINICAL SIGNIFICANCE An SDF program to manage caries is likely to be well-received by functionally-independent older adults. However, the acceptance among frail and functionally-dependent older adults were lower even though SDF is mostly likely to benefit these populations. There is a need to investigate this relatively lower levels of acceptance.
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Affiliation(s)
| | - Mei Na Tan
- National University Centre for Oral Health Singapore, National University Health System, Singapore
| | - Xiaoli Gao
- Faculty of Dentistry, National University of Singapore, Singapore; Saw Swee Hock School of Public Heath, National University of Singapore, Singapore
| | - Hwee Lin Wee
- Saw Swee Hock School of Public Heath, National University of Singapore, Singapore
| | - Bien Wen Pui Lai
- Paediatric Dentistry Unit, National Dental Centre Singapore, Singapore
| | | | - Shijia Hu
- Faculty of Dentistry, National University of Singapore, Singapore.
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Girma A, Abera B, Mekuye B, Mebratie G. Antibacterial Activity and Mechanisms of Action of Inorganic Nanoparticles against Foodborne Bacterial Pathogens: A Systematic Review. IET Nanobiotechnol 2024; 2024:5417924. [PMID: 38863967 PMCID: PMC11095078 DOI: 10.1049/2024/5417924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/25/2023] [Accepted: 07/18/2023] [Indexed: 06/13/2024] Open
Abstract
Foodborne disease outbreaks due to bacterial pathogens and their toxins have become a serious concern for global public health and security. Finding novel antibacterial agents with unique mechanisms of action against the current spoilage and foodborne bacterial pathogens is a central strategy to overcome antibiotic resistance. This study examined the antibacterial activities and mechanisms of action of inorganic nanoparticles (NPs) against foodborne bacterial pathogens. The articles written in English were recovered from registers and databases (PubMed, ScienceDirect, Web of Science, Google Scholar, and Directory of Open Access Journals) and other sources (websites, organizations, and citation searching). "Nanoparticles," "Inorganic Nanoparticles," "Metal Nanoparticles," "Metal-Oxide Nanoparticles," "Antimicrobial Activity," "Antibacterial Activity," "Foodborne Bacterial Pathogens," "Mechanisms of Action," and "Foodborne Diseases" were the search terms used to retrieve the articles. The PRISMA-2020 checklist was applied for the article search strategy, article selection, data extraction, and result reporting for the review process. A total of 27 original research articles were included from a total of 3,575 articles obtained from the different search strategies. All studies demonstrated the antibacterial effectiveness of inorganic NPs and highlighted their different mechanisms of action against foodborne bacterial pathogens. In the present study, small-sized, spherical-shaped, engineered, capped, low-dissolution with water, high-concentration NPs, and in Gram-negative bacterial types had high antibacterial activity as compared to their counterparts. Cell wall interaction and membrane penetration, reactive oxygen species production, DNA damage, and protein synthesis inhibition were some of the generalized mechanisms recognized in the current study. Therefore, this study recommends the proper use of nontoxic inorganic nanoparticle products for food processing industries to ensure the quality and safety of food while minimizing antibiotic resistance among foodborne bacterial pathogens.
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Affiliation(s)
- Abayeneh Girma
- Department of Biology, College of Natural and Computational Science, Mekdela Amba University, P.O. Box 32, Tuluawlia, Ethiopia
| | - Birhanu Abera
- Department of Physics, College of Natural and Computational Science, Mekdela Amba University, P.O. Box 32, Tuluawlia, Ethiopia
| | - Bawoke Mekuye
- Department of Physics, College of Natural and Computational Science, Mekdela Amba University, P.O. Box 32, Tuluawlia, Ethiopia
| | - Gedefaw Mebratie
- Department of Physics, College of Natural and Computational Science, Mekdela Amba University, P.O. Box 32, Tuluawlia, Ethiopia
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Ma FJ, Huang X, Li XY, Tang SL, Li DJ, Cheng YZ, Azam M, Zhang LP, Sun D. Synthesis, structure and biological activity of silver(I) complexes containing triphenylphosphine and non-steroidal anti-inflammatory drug ligands. J Inorg Biochem 2023; 250:112404. [PMID: 39492372 DOI: 10.1016/j.jinorgbio.2023.112404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 11/05/2024]
Abstract
Two Ag(I) complexes containing triphenylphosphine and non-steroidal anti-inflammatory drug ligands were synthesized and investigated using various spectroscopic studies and single crystal X-ray crystallography. The binding properties of tolfenamic acid, ibuprofen and the two complexes with DNA and BSA were investigated using UV or fluorescence spectroscopy. The results showed that two Ag(I) complexes bound to DNA by the intercalation mode and interacted with BSA using a static quenching procedure. Furthermore, the results of fluorescence titration suggested that the complexes had good affinity for BSA and one binding site close to BSA. The in vitro cytotoxicity of tolfenamic acid, ibuprofen, and the two complexes against four human carcinoma cell lines (MCF-7, HepG-2, A549, and HeLa cells) was tested using an MTT assay. Complex 1 had higher cytotoxicity against HeLa cells. The intracellular reactive oxygen species (ROS) assay showed complex 1 induced the ROS generation in HeLa cells in a concentration dependent manner. Flow cytometry analysis showed complex 1 could suppress the HeLa cells growth during the G0/G1 phase and induce apoptosis in dose-depended manner.
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Affiliation(s)
- Feng-Jie Ma
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China
| | - Xiang Huang
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China
| | - Xue-Ying Li
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China
| | - Shi-Li Tang
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China
| | - De-Jun Li
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China
| | - Yuan-Zheng Cheng
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China.
| | - Mohammad Azam
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Li-Ping Zhang
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR China.
| | - Di Sun
- School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100, PR China.
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Dar MO, Mir RH, Mohiuddin R, Masoodi MH, Sofi FA. Metal complexes of xanthine and its derivatives: Synthesis and biological activity. J Inorg Biochem 2023; 246:112290. [PMID: 37327591 DOI: 10.1016/j.jinorgbio.2023.112290] [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: 05/03/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/18/2023]
Abstract
Xanthine and its derivatives are considered an important class of N-heterocyclic purine compounds that have gained significant importance in medicinal chemistry. N-heterocyclic carbene (NHC) and N-coordinated metal complexes of xanthine and its derivatives have revealed a range of new possibilities for their use as therapeutic agents in addition to their established catalytic behavior. The metal complexes of xanthine and its derivatives have been designed and synthesized for the exploration of their potential therapeutic applications. These metal complexes based on the xanthine scaffold exhibited various potential medicinal applications including anticancer, antibacterial, and antileishmanial activity. The metal complexes of xanthine and its derivatives shall pave the way for the rational design and development of new therapeutic agents. In the present comprehensive review, we highlighted the recent advancements in the synthesis and medicinal applications of metal complexes based on N-heterocyclic carbene (NHC) derived from xanthine scaffolds.
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Affiliation(s)
- Mohammad Ovais Dar
- Department of Pharmaceutical Chemistry, M. M. College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133207, India.
| | - Reyaz Hassan Mir
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Hazratbal, Srinagar 190006, J & K, India
| | - Roohi Mohiuddin
- Department of General Medicine, Sher-I-Kashmir Institute of Medical Sciences (SKIMS), Srinagar, Jammu and Kashmir 190001, India
| | - Mubashir H Masoodi
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Hazratbal, Srinagar 190006, J & K, India
| | - Firdoos Ahmad Sofi
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Hazratbal, Srinagar 190006, J & K, India.
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Jin H, Cai M, Deng F. Antioxidation Effect of Graphene Oxide on Silver Nanoparticles and Its Use in Antibacterial Applications. Polymers (Basel) 2023; 15:3045. [PMID: 37514433 PMCID: PMC10386249 DOI: 10.3390/polym15143045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/03/2023] [Accepted: 06/09/2023] [Indexed: 07/30/2023] Open
Abstract
Silver nanoparticles (AgNPs) have drawn great attention due to their outstanding antibacterial effect in a wide range of applications, such as biomass packaging materials, wound dressings, flexible sensors, etc. However, the oxidation of AgNPs limits the antibacterial effect. Firstly, the effects of pretreatment methods on the antibacterial property of AgNPs were investigated by the shake flask method and agar diffusion plate method. Secondly, graphene oxide/silver nanoparticle (GO/AgNPs) nanocomposite prepared by an in-situ growth method was used as antibacterial filler for polyacrylate emulsion via a blending method. The antibacterial mechanism of GO/AgNPs was revealed by comparing the actual contents of oxygen with the theoretically calculated contents of oxygen. Finally, the polyacrylate/graphene oxide/silver nanoparticles (PA/GO/AgNPs) composite emulsion was applied onto a leather surface using a layer-by-layer spraying method to improve the leather's antibacterial properties. The results showed that ultraviolet irradiation could better maintain the antibacterial property of AgNPs, while GO could improve the dispersibility of AgNPs and prevent their oxidation. The leather finished with the PA/GO/AgNPs-2 wt% composite emulsion showed the highest bacteriostatic rate of 74%, demonstrating its great potential in the application of antibacterial leather products.
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Affiliation(s)
- Hua Jin
- School of Design and Innovation, Wenzhou Polytechnic, Wenzhou 325000, China
| | - Mengyao Cai
- College of Art and Design, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Fuquan Deng
- College of Art and Design, Shaanxi University of Science and Technology, Xi'an 710021, China
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Atalay Çetinkaya E, Koç A, Kübra Koç H, Karabıyık H, Karabıyık H, Üstün E, Özdemir İ. Synthesis, characterization and antimicrobial properties of silver complexes derived from 5,6-Dimethylbenzimidazol-2-ylidene. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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12
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Ronga L, Varcamonti M, Tesauro D. Structure-Activity Relationships in NHC-Silver Complexes as Antimicrobial Agents. Molecules 2023; 28:molecules28114435. [PMID: 37298911 DOI: 10.3390/molecules28114435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Silver has a long history of antimicrobial activity and received an increasing interest in last decades owing to the rise in antimicrobial resistance. The major drawback is the limited duration of its antimicrobial activity. The broad-spectrum silver containing antimicrobial agents are well represented by N-heterocyclic carbenes (NHCs) silver complexes. Due to their stability, this class of complexes can release the active Ag+ cations in prolonged time. Moreover, the properties of NHC can be tuned introducing alkyl moieties on N-heterocycle to provide a range of versatile structures with different stability and lipophilicity. This review presents designed Ag complexes and their biological activity against Gram-positive, Gram-negative bacteria and fungal strains. In particular, the structure-activity relationships underlining the major requirements to increase the capability to induce microorganism death are highlighted here. Moreover, some examples of encapsulation of silver-NHC complexes in polymer-based supramolecular aggregates are reported. The targeted delivery of silver complexes to the infected sites will be the most promising goal for the future.
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Affiliation(s)
- Luisa Ronga
- Institut des Sciences Analytiques et de Physico-Chimie Pour l'Environnement et les Matériaux, Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, 64053 Pau, France
| | - Mario Varcamonti
- Department of Biology, University of Naples "Federico II", Via Cynthia, 80143 Naples, Italy
| | - Diego Tesauro
- Department of Pharmacy and Interuniversity Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", Via Montesano, 49, 80131 Naples, Italy
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Chang CH, Tsai LH, Lee YC, Yao WC, Lin JJ. Synergistic Effects of Silicate-Platelet Supporting Ag and ZnO, Offering High Antibacterial Activity and Low Cytotoxicity. Int J Mol Sci 2023; 24:ijms24087024. [PMID: 37108187 PMCID: PMC10138669 DOI: 10.3390/ijms24087024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/02/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Silver nanoparticles (AgNPs) are remarkably able to eliminate microorganisms, but induce cytotoxicity in mammalian cells, and zinc oxide nanoparticles (ZnONPs) are considered to have a wide bactericidal effect with weak cytotoxicity. In this study, both zinc oxide nanoparticles and silver nanoparticles were co-synthesized on a nano-silicate platelet (NSP) to prepare a hybrid of AgNP/ZnONP/NSP. Ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), and transmission electron microscopy (TEM) were used to characterize the formation of nanoparticles on the NSP. Synthesized ZnONP/NSP (ZnONP on NSP) was confirmed by the absorption peaks on UV-Vis and XRD. AgNP synthesized on ZnONP/NSP was also characterized by UV-Vis, and ZnONP/NSP showed no interference with synthesis. The images of TEM demonstrated that NSP provides physical support for the growth of nanoparticles and could prevent the inherent aggregation of ZnONP. In antibacterial tests, AgNP/ZnONP/NSP exhibited more efficacy against Staphylococcus aureus (S. aureus) than ZnONP/NSP (ZnONP was synthesized on NSP) and AgNP/NSP (AgNP was synthesized on NSP). In cell culture tests, 1/10/99 (weight ratio) of AgNP/ZnONP/NSP exhibited low cytotoxicity for mammalian cells (>100 ppm). Therefore, AgNP/ZnONP/NSP, containing both AgNP and ZnONP, with both strong antibacterial qualities and low cytotoxicity, showed potentially advantageous medical utilizations due to its antibacterial properties.
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Affiliation(s)
- Chih-Hao Chang
- Department of Orthopedics, National Taiwan University Hospital Jin-Shan Branch, New Taipei City 20844, Taiwan
- Department of Orthopedics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Li-Hui Tsai
- Department of Biomedical Engineering, National Taiwan University, Taipei 100, Taiwan
| | - Yi-Chen Lee
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Cheng Yao
- Department of Anesthesiology and Pain Medicine, Min-Sheng General Hospital, Taoyuan 330, Taiwan
| | - Jiang-Jen Lin
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
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Qiao Y, Han Y, Guan R, Liu S, Bi X, Liu S, Cui W, Zhang T, He T. Inorganic hollow mesoporous spheres-based delivery for antimicrobial agents. FRONTIERS OF MATERIALS SCIENCE 2023; 17:230631. [PMID: 36911597 PMCID: PMC9991883 DOI: 10.1007/s11706-023-0631-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 11/10/2022] [Indexed: 06/18/2023]
Abstract
Microorganisms coexist with human beings and have formed a complex relationship with us. However, the abnormal spread of pathogens can cause infectious diseases thus demands antibacterial agents. Currently available antimicrobials, such as silver ions, antimicrobial peptides and antibiotics, have diverse concerns in chemical stability, biocompatibility, or triggering drug resistance. The "encapsulate-and-deliver" strategy can protect antimicrobials against decomposing, so to avoid large dose release induced resistance and achieve the controlled release. Considering loading capacity, engineering feasibility, and economic viability, inorganic hollow mesoporous spheres (iHMSs) represent one kind of promising and suitable candidates for real-life antimicrobial applications. Here we reviewed the recent research progress of iHMSs-based antimicrobial delivery. We summarized the synthesis of iHMSs and the drug loading method of various antimicrobials, and discussed the future applications. To prevent and mitigate the spread of an infective disease, multilateral coordination at the national level is required. Moreover, developing effective and practicable antimicrobials is the key to enhancing our capability to eliminate pathogenic microbes. We believe that our conclusion will be beneficial for researches on the antimicrobial delivery in both lab and mass production phases.
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Affiliation(s)
- Yunping Qiao
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Yanyang Han
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Rengui Guan
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Shiliang Liu
- Weifang Branch Company, Shandong HI-speed Transportation Construction Group Co., Ltd., Qingzhou, 262500 China
| | - Xinling Bi
- Shandong Jinhai Titanium Resources Technology Co., Ltd., Binzhou, 256600 China
| | - Shanshan Liu
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Wei Cui
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Tao Zhang
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
| | - Tao He
- Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Clearspring RD 30th, Laishan, Yantai, 264005 China
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15
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Mendes-Oliveira G, Luo Y, Zhou B, Gu G, Teng Z, Bolten S, Park E, Pearlstein D, Turner ER, Millner PD, Nou X. Use of a silver-based sanitizer to accelerate Escherichia coli die-off on fresh-cut lettuce and maintain produce quality during cold storage: Laboratory and pilot-plant scale tests. Food Res Int 2022; 157:111170. [PMID: 35761517 DOI: 10.1016/j.foodres.2022.111170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 11/16/2022]
Abstract
Outbreaks and product recalls involving romaine and iceberg lettuce are frequently reported in the United States. Novel technologies are needed to inactivate pathogens without compromising product quality and shelf life. In this study, the effects of a process aid composed of silver dihydrogen citrate, glycerin, and lactic acid (SGL) on Escherichia coli and Listeria monocytogenes concentrations on lettuce immediately after washing and during cold storage were evaluated. Sensory and quality attributes of fresh-cut iceberg lettuce were also evaluated. Laboratory results indicated that application of SGL solution for 30 s as a first step in the washing process resulted in a 3.15 log reduction in E. coli O157:H7 immediately after washing. For E. coli O157:H7 a significant difference between SGL treatment and all other treatments was maintained until day 7. On day zero, SGL led to a 2.94 log reduction of L. monocytogenes. However, there was no significant difference between treatments with or without SGL regardless of storage time. Pilot-plant results showed that samples receiving SGL spray followed by chlorinated flume wash exhibited a greater reduction (1.48 log) in nonpathogenic E. coli populations at the end of shelf life than other treatments (p < 0.05). Additional pilot plant tests were conducted to investigate the hypothesis that SGL residues could continue to impact microbial survival on the final washed lettuce. Results show that pathogens introduced subsequent to flume washing of lettuce pretreated with SGL solution were not affected by antimicrobial residues. The final quality and shelf life of flume washed lettuce were also unaffected by pretreatment with SGL. In conclusion, the results of this study demonstrate that this new technology has the potential to accelerate E. coli die-off on fresh-cut lettuce during cold storage and improve product safety, while not affecting quality throughout the shelf life of the finished products.
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Affiliation(s)
- Gabriella Mendes-Oliveira
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Yaguang Luo
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States; Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Bin Zhou
- Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Ganyu Gu
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Zi Teng
- Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Samantha Bolten
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Eunhee Park
- Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Daniel Pearlstein
- Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Ellen R Turner
- Food Quality Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
| | - Patricia D Millner
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States.
| | - Xiangwu Nou
- Environmental Microbial and Food Safety Laboratory, United States Department of Agriculture, USDA-ARS, Beltsville, MD 20705, United States
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First Report on the Phenotypic and Genotypic Susceptibility Profiles to Silver Nitrate in Bacterial Strains Isolated from Infected Leg Ulcers in Romanian Patients. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12104801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Silver-ion-based antiseptics are widely used in treating chronic leg ulcers and, given the emergence of resistance to such compounds, the investigation of silver susceptibility and resistance profiles of pathogenic strains isolated from this type of wound is a topic of great interest. Therefore, in this study, 125 bacterial strains isolated from 103 patients with venous ulcers were investigated to elucidate their susceptibility to silver-nitrate solutions in planktonic and biofilm growth states, and the associated genetic determinants. The isolated strains, both in the planktonic and biofilm growth phases, showed high sensitivity to the standard concentration of 1/6000 silver-nitrate solution. It was noticed that even at concentrations lower than the clinical one (the first 2–3 binary dilutions in the case of planktonic cultures and the first 6–7 binary dilutions in the case of biofilms), the antiseptic solution proved to maintain its antibacterial activity. The phenotypic results were correlated with the genetic analysis, highlighting the presence of silver-resistance genes (sil operon) in only a few of the tested Staphylococcus sp. (especially in S. aureus) strains, Escherichia coli and Pseudomonas aeruginosa strains. These results demonstrate that despite its large use, this antiseptic remains a viable treatment alternative for the management of chronic leg wounds.
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Arokiyaraj C, Parthiban E, Ramanibai R, Janarthanan S. Facile green approach for solar energy assisted biogenic nanoparticles synthesis mediated by seed kernel aqueous extract of Trichosanthes tricupsidata and its potential biomedical applications. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2069121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Carpio-Granillo M, Zuno-Cruz FJ, Sánchez-Cabrera G, Rojo-Gómez EG, González-Ábrego DO, Coronel-Olivares C, Caviedes MF, Andrade-López N, Rosales-Hoz MJ, Leyva MA. p–nitrobenzyl-substituted N–heterocyclic carbene in Silver(I) and Gold(I) complexes and their antibacterial activities. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Şahin-Bölükbaşı S, Cantürk-Kılıçkaya P, Kılıçkaya O. Silver(I)-N-heterocyclic carbene complexes challenge cancer; evaluation of their anticancer properties and in silico studies. Drug Dev Res 2021; 82:907-926. [PMID: 33978961 DOI: 10.1002/ddr.21822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/19/2021] [Accepted: 04/25/2021] [Indexed: 02/05/2023]
Abstract
Because of the continuous need for efficient therapeutic agents against various kinds of cancers and infectious diseases, the pharmaceutical industry has to find new candidates and strategies to develop novel and efficient drugs. They increasingly use computational tools in R&D stages for screening extensive sets of drug candidates before starting pre-clinical and clinical trials. N-Heterocyclic carbenes (NHCs) can be evaluated as good drug candidates because they offer both anti-cancer and anti-inflammatory features with their general low-toxicity profiles. To date, different kinds of NHCs (Cu, Co, Ni, Au, Ag, Ru, etc.) have been synthesized and their therapeutic uses has been shown. Here, we have reviewed the recent studies focused on Ag(I)-NHC complexes and their anti-cancer activities. Also, existing examples of the usage of density functional theory and structure-activity relationship have been evaluated.
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Affiliation(s)
- Serap Şahin-Bölükbaşı
- Department of Biochemistry, Faculty of Pharmacy, Sivas Cumhuriyet University, Sivas, Turkey
| | - Pakize Cantürk-Kılıçkaya
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Sivas Cumhuriyet University, Sivas, Turkey
| | - Ozan Kılıçkaya
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Sivas Cumhuriyet University, Sivas, Turkey
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20
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Moringa oleifera gum based silver and zinc oxide nanoparticles: green synthesis, characterization and their antibacterial potential against MRSA. Biomater Res 2021; 25:17. [PMID: 33964968 PMCID: PMC8106117 DOI: 10.1186/s40824-021-00219-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 04/25/2021] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Herein, we first time used the gum Moringa oleifera as reducing and capping agent for successful synthesis of silver nitrate and zinc oxide nanoparticles(NPs) through green synthesis approach. This study was aimed to check antibacterial activities of synthesized NPs against multidrug resistant bacteria methicillin-resistant Staphylococcus aureus (MRSA). METHODS Aqueous solutions of AgNO3 and purified gum powder were mixed with 1:1 ratio, autoclaved at 120oC for 2 min. NPs pellet collected after centrifugation at 10,000 g for 20 min. ZnO NPs were prepared by mixing purified gum powder and metal salt with1:1 ratio, heated (70oC) and stirred at 100 rpm for 4 h followed by centrifugation at 10,000 g for 20 min. Pellet was washed and calcinated at 400oC for 4 h. Antibacterial potential against E. coli, S. aureus and methicillin-resistant Staphylococcus aureus (MRSA) was assessed by widely used Kirby-Bauer antibiotic susceptibility test. RESULTS Optical observation of colour change from transparent to dark and UV-Visible analysis confirmed the synthesis of NPs. Fourier transform infrared spectroscopy (FTIR) of prepared nonmaterial revealed the characteristic AgNPs and ZnO stretch vibrations at wave number of 523 cm- 1 and 471 cm- 1resectively. Crystalline nature of AgNPs and ZnO NPs was confirmed by x-ray diffraction pattern with clear sharp Peaks. Scanning electron microscopy (SEM) revealed good surface morphology of AgNPs and ZnO NPs with 50nm and 60nm size respectively. AgNPs and ZnO NPs exhibited excellent antibacterial activity against E. coli (with zone of inhibition of 21 ± 02mm and 22 ± 03mm) and S.aureus ( with zone of inhibition of 20 ± 03mm and 21 ± 02mm) while good activity was observed against "super bug" methicillin-resistant Staphylococcus aureus (MRSA) with 16 ± 03mm ad 17 ± 02mm zone if inhibitions respectively. CONCLUSIONS This novel addition of Moringa Gum based nanoparticles will open new dimensions in the field of nanomedicine and pharmaceutics especially against MDR bacterial strains.
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21
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Olaya W, Dilawar H, Eskicioglu C. Comparative response of thermophilic and mesophilic sludge digesters to zinc oxide nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:24521-24534. [PMID: 32399876 DOI: 10.1007/s11356-020-09067-7] [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: 12/06/2019] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
The inevitable discharge of zinc oxide nanoparticles (ZnO NPs), from consumer and industrial products, into wastewater treatment plants (WWTPs) has created a need to determine their effect on sludge digestion. In this study, the effect of particle size (30 nm and 100 nm), type (coated and non-coated), and dose (6, 75, and 150 mg/g feed total solids (TS)) of ZnO NPs on anaerobic sludge digestion was studied under mesophilic (35 °C) and thermophilic (55 °C) conditions. The effect was investigated in two stages with different digester feeding regime: (1) batch biochemical methane potential (BMP) assays, and (2) semi-continuously fed reactors. Results showed that ZnO NPs were inhibitory at medium and high levels (75 and 100 mg ZnO/g TS, respectively). Coated NPs created less inhibition than non-coated NPs. Thermophilic bacteria were more sensitive to ZnO NPs compared with mesophilic bacteria. For the non-coated ZnO NPs, only the mesophilic batch assays were able to recover at the medium concentration and the thermophilic reactors presented chronic inhibition and could not recover. As a beneficial outcome, coated ZnO NPs significantly reduced odor-causing volatile sulfur compounds in digester headspace in comparison with the non-coated NPs. In summary, the condition in which ZnO NPs would have little to no effect would be 6 mg/g TS-coated ZnO NPs under mesophilic conditions.
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Affiliation(s)
- Wesley Olaya
- UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia, Okanagan Campus, 1137 Alumni Avenue, Kelowna, BC, V1V 1V7, Canada
| | - Hina Dilawar
- UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia, Okanagan Campus, 1137 Alumni Avenue, Kelowna, BC, V1V 1V7, Canada
| | - Cigdem Eskicioglu
- UBC Bioreactor Technology Group, School of Engineering, The University of British Columbia, Okanagan Campus, 1137 Alumni Avenue, Kelowna, BC, V1V 1V7, Canada.
- EME 4273, School of Engineering, Faculty of Applied Science, The University of British Columbia, Okanagan Campus, 1137 Alumni Avenue, Kelowna, BC, V1V 1V7, Canada.
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N-heterocyclic carbene-metal complexes as bio-organometallic antimicrobial and anticancer drugs, an update (2015–2020). Future Med Chem 2020; 12:2239-2275. [DOI: 10.4155/fmc-2020-0175] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
N-heterocyclic carbenes (NHCs) are organic compounds that typically mimic the chemical properties of phosphines. NHCs have made a significant impact on the field of coordination and organometallic chemistry because they are easy to prepare and handle and because of their versatility and stability. Importantly, the physicochemical properties of NHCs can be easily fine-tuned by simple variation of substituents on the nitrogen atoms. Over the past few years, various NHC–metal complexes have been extensively used as metal-based drug candidates and catalysts (homogeneous or heterogeneous) for various applications. To help assist future work with these compounds, this review provides a thorough review on the latest information involving some biomedical applications of NHC–metal complexes. Specifically, this article focuses on recent advances in the design, synthesis, characterization and biomedical applications (e.g., antimicrobial and anticancer activity) of various NHC–metal complexes (metal: silver, gold, palladium, rhodium, ruthenium, iridium and platinum) covering work published from 2015 to 2020. It is hoped that the promising discoveries to date will help accelerate studies on the encouraging potential of NHC–metal complexes as a class of effective therapeutic agents.
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Talapko J, Matijević T, Juzbašić M, Antolović-Požgain A, Škrlec I. Antibacterial Activity of Silver and Its Application in Dentistry, Cardiology and Dermatology. Microorganisms 2020; 8:1400. [PMID: 32932967 PMCID: PMC7565656 DOI: 10.3390/microorganisms8091400] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/07/2020] [Accepted: 09/11/2020] [Indexed: 02/07/2023] Open
Abstract
The problem of antimicrobial resistance is increasingly present and requires the discovery of new antimicrobial agents. Although the healing features of silver have been recognized since ancient times, silver has not been used due to newly discovered antibiotics. Thanks to technology development, a significant step forward has been made in silver nanoparticles research. Nowadays, silver nanoparticles are a frequent target of researchers to find new and better drugs. Namely, there is a need for silver nanoparticles as alternative antibacterial nanobiotics. Silver nanoparticles (AgNPs), depending on their size and shape, also have different antimicrobial activity. In addition to their apparent antibacterial activity, AgNPs can serve as drug delivery systems and have anti-thrombogenic, anti-platelet, and anti-hypertensive properties. Today they are increasingly used in clinical medicine and dental medicine. This paper presents silver antimicrobial activity and its use in dentistry, cardiology, and dermatology, where it has an extensive range of effects.
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Affiliation(s)
- Jasminka Talapko
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, HR-31000 Osijek, Croatia; (J.T.); (M.J.)
| | - Tatjana Matijević
- Department of Dermatology and Venereology, Clinical Hospital Center Osijek, HR-31000 Osijek, Croatia;
| | - Martina Juzbašić
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, HR-31000 Osijek, Croatia; (J.T.); (M.J.)
| | - Arlen Antolović-Požgain
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, HR-31000 Osijek, Croatia
- Department of Microbiology, Institute of Public Health Osijek, HR-31000 Osijek, Croatia
| | - Ivana Škrlec
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, HR-31000 Osijek, Croatia; (J.T.); (M.J.)
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Zhao M, Zhang D, Tan L, Huang H. Silver dressings for the healing of venous leg ulcer: A meta-analysis and systematic review. Medicine (Baltimore) 2020; 99:e22164. [PMID: 32925780 PMCID: PMC7489700 DOI: 10.1097/md.0000000000022164] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This study was aimed to evaluate whether silver-containing dressings were superior to other types of dressings in the treatment of venous leg ulcers (VLU) and their specific advantages.Eight databases (Cochrane Library, PubMed, Web of Science, Ovid-Medline, Wanfang, VIP, China Biology Medicine, and China National Knowledge Infrastructure) were systematically reviewed from inception to May 2019 for randomized controlled trials (RCTs). The primary outcome was complete wound healing, and the secondary outcomes included absolute wound size changes (change of cm area since baseline), relative changes (percentage change of area relative to baseline), and healing rate. Two reviewers independently evaluated the risk of bias using the Cochrane Collaboration assessment tool and extracted the data according to the predesigned table. All analyses were performed using the latest Review Manager Software (version 5.3).A total of 8 studies qualified and were included in the meta-analysis, including 1057 patients (experiment: 526, control: 531). Both complete wound healing and wound healing rates were reported in 5 studies. Two and 3 studies reported the effect of silver dressings on absolute and relative wound size changes, respectively. Most of the studies used intention-to-treat analysis.There was sufficient evidence that silver-containing dressings can accelerate the healing rate of chronic VLU and improve their healing in a short duration of time. However, compared with other dressings, clinical trials with long-term follow-up data are needed to confirm whether silver dressings have advantages regarding complete wound healing.
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Affiliation(s)
- Minyan Zhao
- Department of Oncology, The Second Affiliated Hospital of Soochow University
| | | | - Liping Tan
- Department of Nursing, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hui Huang
- Department of Nursing, The Second Affiliated Hospital of Soochow University, Suzhou, China
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Affiliation(s)
- Sarah K. Pilz
- Anorganische Chemie Fakultät für Mathematik und Naturwissenschaften Bergische Universität Wuppertal 42119 Wuppertal Germany
| | - Fabian Mohr
- Anorganische Chemie Fakultät für Mathematik und Naturwissenschaften Bergische Universität Wuppertal 42119 Wuppertal Germany
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Study of new cellulosic dressing with enhanced antibacterial performance grafted with a biopolymer of chitosan and myrrh polysaccharide extract. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Sethuram L, Thomas J, Mukherjee A, Chandrasekaran N. Effects and formulation of silver nanoscaffolds on cytotoxicity dependent ion release kinetics towards enhanced excision wound healing patterns in Wistar albino rats. RSC Adv 2019; 9:35677-35694. [PMID: 35528070 PMCID: PMC9074428 DOI: 10.1039/c9ra06913e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 10/23/2019] [Indexed: 01/09/2023] Open
Abstract
Wound tissue regeneration and angiogenesis are dynamic processes that send physiological signals to the body. Thus, designing novel nanoscaffolds by understanding their surface modifications and toxicological response in a biological system with a potent anti-inflammatory response is a viable solution. In this respect, inspired by the surface chemistry, in the present work we focus on the chemical optimization of silver nanoscaffolds using surface cappings in order to understand their kinetic release behaviour in simulated wound fluids (SWF), to analyze their blood compatibility in human lymphocytes and erythrocytes and then embed them in a chitosan-agarose matrix (CAM) as a productive drug delivery system to evaluate in vivo excision wound tissue regeneration efficiency in Wistar rats. In this regard, polyvinyl alcohol capped silver nanocomposites (PVA-AgNPs) exhibit a dominant antibacterial efficacy with the sustained and controlled release of silver ions and percentage cell mortality and percentage hemolysis of only 10% and 16% compared with uncapped-AgNPs or silver bandaids (SBDs). Also, PVA-AgNP impregnated CAM (PVA-CAM) shows positive effects through their anti-inflammatory and angiogenic properties, with a nearly 95% healing effect within 9 days. The complete development of collagen and fibroblast constituents was also monitored in PVA-CAM by hematoxylin & eosin (H & E) and Masson trichrome (MT) staining. These results provide a clear insight into the development of a potent therapeutic formulation using CAM as a scaffold incorporated with surface functionalized PVA-AgNPs as a bioeffective and biocompatible polymer for the fabrication of efficacious silver wound dressing scaffolds in clinical practice.
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Affiliation(s)
- Lakshimipriya Sethuram
- Centre for Nanobiotechnology, VIT University Vellore Tamilnadu India +91 416 2243092 +91 416 2202624
| | - John Thomas
- Centre for Nanobiotechnology, VIT University Vellore Tamilnadu India +91 416 2243092 +91 416 2202624
| | - Amitava Mukherjee
- Centre for Nanobiotechnology, VIT University Vellore Tamilnadu India +91 416 2243092 +91 416 2202624
| | - Natarajan Chandrasekaran
- Centre for Nanobiotechnology, VIT University Vellore Tamilnadu India +91 416 2243092 +91 416 2202624
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Synthesis of nanostructured Ag@SiO2-Penicillin from high purity Ag NPs prepared by electromagnetic levitation melting process. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:616-622. [DOI: 10.1016/j.msec.2019.04.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 04/23/2019] [Accepted: 04/25/2019] [Indexed: 12/31/2022]
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Zhou X, Huang X, Li M, Peng X, Wang S, Zhou X, Cheng L. Development and status of resin composite as dental restorative materials. J Appl Polym Sci 2019. [DOI: 10.1002/app.48180] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xinxuan Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xiaoyu Huang
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Mingyun Li
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xian Peng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Suping Wang
- Department of Operative Dentistry and Endodontics & Stomatology CenterThe First Affiliated Hospital of Zhengzhou University Zhengzhou 540052 Henan China
| | - Xuedong Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Lei Cheng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
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30
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Cereceres S, Lan Z, Bryan L, Whitely M, Wilems T, Greer H, Alexander ER, Taylor RJ, Bernstein L, Cohen N, Whitfield-Cargile C, Cosgriff-Hernandez E. Bactericidal activity of 3D-printed hydrogel dressing loaded with gallium maltolate. APL Bioeng 2019; 3:026102. [PMID: 31123722 PMCID: PMC6506339 DOI: 10.1063/1.5088801] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/03/2019] [Indexed: 12/21/2022] Open
Abstract
Chronic wounds are projected to reach epidemic proportions worldwide because of the aging population and the increasing incidence of diabetes. Despite extensive research, infection remains one of the leading sources of complications in chronic wounds, resulting in improper healing, biofilm formation, and lower extremity amputation. To address the limitations of standard treatments, we have developed a hydrogel wound dressing with self-tuning moisture control that incorporates a novel antimicrobial agent to eliminate and prevent infection. 3D-printing of a hydrogel dressing with dual porosity resulted in a new dressing with greater flexibility, increased water uptake, and more rapid swelling than bulk hydrogel dressings. Additionally, gallium maltolate (GaM) was incorporated into the dressing to investigate the efficacy of this antimicrobial agent. Loading profiles, release kinetics, and the bactericidal activity against Staphylococcus aureus (including methicillin-resistant Staphylococcus aureus) of GaM were investigated in vitro to identify target profiles that supported infection control. Finally, GaM-loaded hydrogel dressings were evaluated in vivo, utilizing a murine splinted-wound model that was inoculated with S. aureus. In comparison to an untreated control, GaM dressings markedly reduced the wound bacterial load without compromising wound closure rates. Overall, this work demonstrates the utility of a 3D-printed hydrogel dressing as an antimicrobial dressing to control infection in chronic wounds.
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Affiliation(s)
- Stacy Cereceres
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, USA
| | - Ziyang Lan
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Laura Bryan
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Michael Whitely
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, USA
| | - Thomas Wilems
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Hunter Greer
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Ellen Ruth Alexander
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Robert J Taylor
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | | | - Noah Cohen
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Canaan Whitfield-Cargile
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
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Abstract
Silver is added to an array of commercially available healthcare products including wound dressings. However, overuse of silver is being raised as a potential health concern due to the possible selection of tolerant or resistant bacteria and as a factor that may induce cross resistance to antibiotics. To date, there are only a limited number of studies that have documented evidence of silver resistance in bacteria isolated from medical situations. These studies have indicated low levels of silver resistance in bacteria. However, in comparison to antibiotics, only a small number of studies have been undertaken to investigate silver resistance. It is clear that more studies are required to confirm the most effective therapeutic levels of silver that are needed to kill microbes. In addition, it is probable that sub-therapeutic levels of silver may potentially select for enhanced microbial tolerance. Nevertheless, to date, there still remains very little evidence that silver resistance is a growing health concern in wound care; more studies are clearly needed to substantiate this concern, which has not been observed clinically to any major degree. The issue of biofilm tolerance to silver is more complicated and data on the effect of silver on biofilms is sparse at present.
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Affiliation(s)
- Steven L Percival
- a R&D Department, Centre of Excellence in Biofilm Science (CEBS) , 5D Health Protection Group Ltd , Liverpool Bio-Innovation Hub , Liverpool , UK
| | - Anne-Marie Salisbury
- a R&D Department, Centre of Excellence in Biofilm Science (CEBS) , 5D Health Protection Group Ltd , Liverpool Bio-Innovation Hub , Liverpool , UK
| | - Rui Chen
- a R&D Department, Centre of Excellence in Biofilm Science (CEBS) , 5D Health Protection Group Ltd , Liverpool Bio-Innovation Hub , Liverpool , UK
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32
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Kankala S, Thota N, Björkling F, Taylor MK, Vadde R, Balusu R. Silver carbene complexes: An emerging class of anticancer agents. Drug Dev Res 2018; 80:188-199. [PMID: 30387164 DOI: 10.1002/ddr.21478] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 12/15/2022]
Abstract
Cancer is a major global health problem with large therapeutic challenges. Although substantial progress has been made in cancer therapy, there still remains a need to develop novel and effective treatment strategies to treat several relapsed and refractory cancers. Recently, there has been growing demand for considering organometallics as antineoplastic agents. This review is focused on a group of organometallics, silver N-heterocyclic carbene complexes (SCCs) and their anticancer efficacy in targeting multiple pathways in various in vitro cancer model systems. However, the precise molecular mechanism of SCCs anticancer properties remains unclear. Here, we discuss the SCCs chemistry, potential molecular targets, possible molecular mechanism of action, and their application in cancer therapies.
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Affiliation(s)
| | - Niranjan Thota
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Fredrik Björkling
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Myles K Taylor
- University of Kansas Medical Center, Kansas City, Kansas
| | - Ravinder Vadde
- Department of Chemistry, Kakatiya University, Warangal, Telangana State, India
| | - Ramesh Balusu
- University of Kansas Medical Center, Kansas City, Kansas.,Division of Hematologic Malignancies and Cellular Therapeutics, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas
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33
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Shahriary M, Veisi H, Hekmati M, Hemmati S. In situ green synthesis of Ag nanoparticles on herbal tea extract (Stachys lavandulifolia)-modified magnetic iron oxide nanoparticles as antibacterial agent and their 4-nitrophenol catalytic reduction activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:57-66. [DOI: 10.1016/j.msec.2018.04.044] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 03/25/2018] [Accepted: 04/16/2018] [Indexed: 02/03/2023]
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34
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Human exposure to nanoparticles through trophic transfer and the biosafety concerns that nanoparticle-contaminated foods pose to consumers. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.03.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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35
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36
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Jo JK, El-Fiqi A, Lee JH, Kim DA, Kim HW, Lee HH. Rechargeable microbial anti-adhesive polymethyl methacrylate incorporating silver sulfadiazine-loaded mesoporous silica nanocarriers. Dent Mater 2017; 33:e361-e372. [DOI: 10.1016/j.dental.2017.07.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 04/29/2017] [Accepted: 07/08/2017] [Indexed: 12/19/2022]
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37
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Synthesis, structural investigation and antibacterial studies of non–symmetrically p–nitrobenzyl substituted benzimidazole N–heterocyclic carbene–silver(I) complexes. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.06.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Patra JK, Baek KH. Antibacterial Activity and Synergistic Antibacterial Potential of Biosynthesized Silver Nanoparticles against Foodborne Pathogenic Bacteria along with its Anticandidal and Antioxidant Effects. Front Microbiol 2017; 8:167. [PMID: 28261161 PMCID: PMC5309230 DOI: 10.3389/fmicb.2017.00167] [Citation(s) in RCA: 157] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/23/2017] [Indexed: 01/08/2023] Open
Abstract
Silver nanoparticles plays a vital role in the development of new antimicrobial substances against a number of pathogenic microorganisms. These nanoparticles due to their smaller size could be very effective as they can improve the antibacterial activity through lysis of bacterial cell wall. Green synthesis of metal nanoparticles using various plants and plant products has recently been successfully accomplished. However, few studies have investigated the use of industrial waste materials in nanoparticle synthesis. In the present investigation, synthesis of silver nanoparticles (AgNPs) was attempted using the aqueous extract of corn leaf waste of Zea mays, which is a waste material from the corn industry. The synthesized AgNPs were evaluated for their antibacterial activity against foodborne pathogenic bacteria (Bacillus cereus ATCC 13061, Listeria monocytogenes ATCC 19115, Staphylococcus aureus ATCC 49444, Escherichia coli ATCC 43890, and Salmonella Typhimurium ATCC 43174) along with the study of its synergistic antibacterial activity. The anticandidal activity of AgNPs were evaluated against Candida species (C. albicans KACC 30003 and KACC 30062, C. glabrata KBNO6P00368, C. geochares KACC 30061, and C. saitoana KACC 41238), together with the antioxidant potential. The biosynthesized AgNPs were characterized by UV-Vis spectrophotometry with surface plasmon resonance at 450 nm followed by the analysis using scanning electron microscope, X-ray diffraction, Fourier-transform infrared spectroscopy and thermogravimetric analysis. The AgNPs displayed moderate antibacterial activity (9.26-11.57 mm inhibition zone) against all five foodborne pathogenic bacteria. When AgNPs were mixed with standard antibacterial or anticandidal agent, they displayed strong synergistic antibacterial (10.62-12.80 mm inhibition zones) and anticandidal activity (11.43-14.33 mm inhibition zones). In addition, the AgNPs exhibited strong antioxidant potential. The overall results highlighted the potential use of maize industrial waste materials in the synthesis of AgNPs and their utilization in various applications particularly as antibacterial substance in food packaging, food preservation to protect against various dreadful foodborne pathogenic bacteria together with its biomedical, pharmaceutical based activities.
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Affiliation(s)
- Jayanta Kumar Patra
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-SeoulGoyang-si, South Korea
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam UniversityGyeongsan, South Korea
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39
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Cao Y, Lv J, Yu K, Wang CM, Su ZH, Wang L, Zhou BB. Synthesis and photo-/electro-catalytic properties of Keggin polyoxometalate inorganic–organic hybrid layers based on d10 metal and rigid benzo-diazole/-triazole ligands. NEW J CHEM 2017. [DOI: 10.1039/c7nj02615c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual hepta- and nona-nuclear copper/silver complexes were introduced into different Keggin cluster leading to 2-D hybrid layers, which exhibit merit photo- and electro-catalytic properties.
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Affiliation(s)
- Yue Cao
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
| | - Jinghua Lv
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
| | - Kai Yu
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
| | - Chun-mei Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
| | - Zhan-hua Su
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
| | - Lu Wang
- Department of Biochemical Engineering
- Harbin Institute of Technology
- Harbin
- People's Republic of China
| | - Bai-bin Zhou
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin 150025
- People's Republic of China
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40
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Myconanotechnology to Treat Infectious Diseases: A Perspective. Fungal Biol 2017. [DOI: 10.1007/978-3-319-68424-6_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Assessment of Deep Partial Thickness Burn Treatment with Keratin Biomaterial Hydrogels in a Swine Model. BIOMED RESEARCH INTERNATIONAL 2016; 2016:1803912. [PMID: 28025638 PMCID: PMC5153489 DOI: 10.1155/2016/1803912] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/19/2016] [Accepted: 10/16/2016] [Indexed: 01/28/2023]
Abstract
Partial thickness burns can advance to full thickness after initial injury due to inadequate tissue perfusion and increased production of inflammatory cytokines, which has been referred to as burn wound progression. In previous work, we demonstrated that a keratin biomaterial hydrogel appeared to reduce burn wound progression. In the present study, we tested the hypothesis that a modified keratin hydrogel could reduce burn wound progression and speed healing. Standardized burn wounds were created in Yorkshire swine and treated within 30 minutes with keratin hydrogel (modified and unmodified), collagen hydrogel, or silver sulfadiazine (SSD). Digital images of each wound were taken for area measurements immediately prior to cleaning and dressing changes. Wound tissue was collected and assessed histologically at several time points. Wound area showed a significant difference between hydrogels and SSD groups, and rates of reepithelialization at early time points showed an increase when keratin treatment was used compared to both collagen and SSD. A linear regression model predicted a time to wound closure of approximately 25 days for keratin hydrogel while SSD treatment required 35 days. There appeared to be no measurable differences between the modified and unmodified formulations of keratin hydrogels.
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42
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N-heterocyclic carbene metal complexes as bio-organometallic antimicrobial and anticancer drugs. Future Med Chem 2016; 7:1305-33. [PMID: 26144266 DOI: 10.4155/fmc.15.61] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Late transition metal complexes that bear N-heterocyclic carbene (NHC) ligands have seen a speedy growth in their use as both, metal-based drug candidates and potentially active homogeneous catalysts in a plethora of C-C and C-N bond forming reactions. This review article focuses on the recent developments and advances in preparation and characterization of NHC-metal complexes (metal: silver, gold, copper, palladium, nickel and ruthenium) and their biomedical applications. Their design, syntheses and characterization have been reviewed and correlated to their antimicrobial and anticancer efficacies. All these initial discoveries help validate the great potential of NHC-metal derivatives as a class of effective antimicrobial and anticancer agents.
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43
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Kadar A, Eisenberg G, Yahav E, Drexler M, Salai M, Steinberg E. Surgical site infection in elderly patients with hip fractures, silver-coated versus regular dressings: a randomised prospective trial. J Wound Care 2015; 24:441-2, 444-5. [DOI: 10.12968/jowc.2015.24.10.441] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A. Kadar
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
| | - G. Eisenberg
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
| | - E. Yahav
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
| | - M. Drexler
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
| | - M. Salai
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
| | - E.L. Steinberg
- All at the Orthopedic Division, Tel Aviv Sourasky Medical Center, 6 Weizmann St., Tel Aviv 6423906, Israel
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44
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Wright BD, Deblock MC, Wagers PO, Duah E, Robishaw NK, Shelton KL, Southerland MR, DeBord MA, Kersten KM, McDonald LJ, Stiel JA, Panzner MJ, Tessier CA, Paruchuri S, Youngs WJ. Anti-tumor activity of lipophilic imidazolium salts on select NSCLC cell lines. Med Chem Res 2015; 24:2838-2861. [PMID: 26446298 PMCID: PMC4593509 DOI: 10.1007/s00044-015-1330-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/19/2015] [Indexed: 10/23/2022]
Abstract
The anti-tumor activity of imidazolium salts is highly dependent upon the substituents on the nitrogen atoms of the imidazolium cation. We have synthesized and characterized a series of naphthalene-substituted imidazolium salts and tested them against a variety of non-smallcell lung cancer cell lines. Several of these complexes displayed anticancer activity comparable to cisplatin. These compounds induced apoptosis in the NCI-H460 cell line as determined by Annexin V staining, caspase-3, and PARP cleavage. These results strongly suggest that this class of compounds can serve as potent chemotherapeutic agents.
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Affiliation(s)
- Brian D. Wright
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Michael C. Deblock
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Patrick O. Wagers
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Ernest Duah
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Nikki K. Robishaw
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Kerri L. Shelton
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | | | - Michael A. DeBord
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Kortney M. Kersten
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Lucas J. McDonald
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Jason A. Stiel
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Matthew J. Panzner
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Claire A. Tessier
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Sailaja Paruchuri
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
| | - Wiley J. Youngs
- Department of Chemistry, The University of Akron, Akron, OH 44325-3601, USA
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45
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Dias FGF, Dias PHGF, Prudente A, Riccetto C. New strategies to improve results of mesh surgeries for vaginal prolapses repair--an update. Int Braz J Urol 2015; 41:623-34. [PMID: 26401853 PMCID: PMC4756989 DOI: 10.1590/s1677-5538.ibju.2014.0163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Accepted: 02/16/2015] [Indexed: 12/25/2022] Open
Abstract
The use of meshes has become the first option for the treatment of soft tissue disorders as hernias and stress urinary incontinence and widely used in vaginal prolapse's treatment. However, complications related to mesh issues cannot be neglected. Various strategies have been used to improve tissue integration of prosthetic meshes and reduce related complications. The aim of this review is to present the state of art of mesh innovations, presenting the whole arsenal which has been studied worldwide since composite meshes, coated meshes, collagen's derived meshes and tissue engineered prostheses, with focus on its biocompatibility and technical innovations, especially for vaginal prolapse surgery.
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Affiliation(s)
| | | | | | - Cassio Riccetto
- Departamento de Urologia da Universidade de Campinas, Campinas, SP, Brasil
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46
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Abstract
Silver compounds are increasingly used in medical applications and consumer products. Confusion exists over the benefits and hazards associated with silver compounds. In this article, the biochemistry and physiology of silver are reviewed with emphasis on the use of silver for wound care.
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47
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Tummalapalli M, Deopura B, Alam M, Gupta B. Facile and green synthesis of silver nanoparticles using oxidized pectin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 50:31-6. [DOI: 10.1016/j.msec.2015.01.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/20/2014] [Accepted: 01/14/2015] [Indexed: 12/01/2022]
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48
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Leawhiran N, Pavasant P, Soontornvipart K, Supaphol P. Gamma irradiation synthesis and characterization of AgNP/gelatin/PVA hydrogels for antibacterial wound dressings. J Appl Polym Sci 2014. [DOI: 10.1002/app.41138] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nuchanan Leawhiran
- Faculty of Engineering; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
| | - Prasit Pavasant
- Faculty of Dentistry; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
| | | | - Pitt Supaphol
- The Petroleum and Petrochemical College; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
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49
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McShan D, Ray PC, Yu H. Molecular toxicity mechanism of nanosilver. J Food Drug Anal 2014; 22:116-127. [PMID: 24673909 PMCID: PMC4281024 DOI: 10.1016/j.jfda.2014.01.010] [Citation(s) in RCA: 436] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 12/27/2013] [Indexed: 12/12/2022] Open
Abstract
Silver is an ancient antibiotic that has found many new uses due to its unique properties on the nanoscale. Due to its presence in many consumer products, the toxicity of nanosilver has become a hot topic. This review summarizes recent advances, particularly the molecular mechanism of nanosilver toxicity. The surface of nanosilver can easily be oxidized by O2 and other molecules in the environmental and biological systems leading to the release of Ag+, a known toxic ion. Therefore, nanosilver toxicity is closely related to the release of Ag+. In fact, it is difficult to determine what portion of the toxicity is from the nano-form and what is from the ionic form. The surface oxidation rate is closely related to the nanosilver surface coating, coexisting molecules, especially thiol-containing compounds, lighting conditions, and the interaction of nanosilver with nucleic acids, lipid molecules, and proteins in a biological system. Nanosilver has been shown to penetrate the cell and become internalized. Thus, nanosilver often acts as a source of Ag+ inside the cell. One of the main mechanisms of toxicity is that it causes oxidative stress through the generation of reactive oxygen species and causes damage to cellular components including DNA damage, activation of antioxidant enzymes, depletion of antioxidant molecules (e.g., glutathione), binding and disabling of proteins, and damage to the cell membrane. Several major questions remain to be answered: (1) the toxic contribution from the ionic form versus the nano-form; (2) key enzymes and signaling pathways responsible for the toxicity; and (3) effect of coexisting molecules on the toxicity and its relationship to surface coating.
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Affiliation(s)
- Danielle McShan
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA
| | - Paresh C Ray
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA
| | - Hongtao Yu
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA.
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50
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Synthesis of water soluble copper(II) complexes: crystal structures, DNA binding, oxidative DNA cleavage, and in vitro anticancer studies. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0824-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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