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Xu GY, Zhao IS, Lung CYK, Yin IX, Lo ECM, Chu CH. Silver Compounds for Caries Management. Int Dent J 2024; 74:179-186. [PMID: 38008704 PMCID: PMC10988255 DOI: 10.1016/j.identj.2023.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 11/28/2023] Open
Abstract
Silver metal and compounds have antibacterial properties, although their action's mechanisms are not fully understood. Scientists generally consider that silver disrupts the bacterial cell wall. It causes a structural change in the bacterial cell membrane and cytoplasm. It also stops deoxyribonucleic acid replication, resulting in inactivating enzymatic activity and cell death. The antimicrobial effect of silver-containing compounds relies on the release of bioactive silver ions. Hence, silver metal and compounds have been used in medicine to prevent infection for hundreds of years. Silver metal and compounds are also used as antibacterial agents in dentistry. Studies have shown that silver compounds are effective in the management of dental caries. Fluoride-containing silver compounds have been found in experiments to be beneficial at remineralising dental cavities. Silver diamine fluoride (SDF) can assist in preventing and arresting tooth cavities. The World Health Organization included SDF in its Model List of Essential Medicine for both adults and children in 2021. Clinicians also use SDF to manage dentine hypersensitivity as well as to inhibit growth of periodontal pathogens. However, traditional silver compounds cause tooth discolouration because of the silver-staining effect. These side effects of their applications depend on the amount applied and the frequency of application. Researchers are developing nanosilver fluoride and silver nanoparticles to overcome the staining. This review gives an overview of the antibacterial mechanism of silver compounds, namely silver nitrate, silver fluoride, SDF, silver nanoparticles, and nano silver fluoride for caries management. The outlook for the future development of silver compounds will be discussed.
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Affiliation(s)
- Grace Y Xu
- School of Dentistry, Shenzhen University Health Science Center, Shenzhen, China; Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Irene S Zhao
- School of Dentistry, Shenzhen University Health Science Center, Shenzhen, China; Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Christie Y K Lung
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Iris X Yin
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Edward C M Lo
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Chun Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
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Wang L, Xin M, Li M, Zhang T, Pang Y, Mao Y. Preparation of biguanidine quaternary ammonium salts grafted chitosan with enhanced antibacterial and antibiofilm activities. Carbohydr Res 2024; 538:109078. [PMID: 38513462 DOI: 10.1016/j.carres.2024.109078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/03/2024] [Accepted: 03/07/2024] [Indexed: 03/23/2024]
Abstract
N-(4-N'-pyridine-benzylcarbonyl chloride) chitosan (CBPyC), N-p-biguanidine benzoyl chitosan (CSBG), and N-(p-biguanidine -1-pyridine-4-benzylcarbonyl chloride) chitosan (CSQPG) were synthesized. The structures of prepared chitosan derivatives were characterized using nuclear magnetic resonance spectroscopy (NMR) and ultraviolet-visible (UV-vis) spectroscopy, and the degree of substitution was determined through elemental analysis (EA) and evaluated on the basis of the integral values in 1H NMR. The antibacterial activities of chitosan derivatives against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were investigated in vitro using antibacterial rate, minimal inhibitory concentration and minimum bacterial concentration assays. The antibiofilm activity was also assessed using the crystal violet assay. CSQPC exhibited higher antibacterial and antibiofilm activities against E. coli and S. aureus compared to CBPyC and CSBG. The antibacterial rate of CSQPG against E. coli and S. aureus at a concentration of 0.5 mg/mL was 43.3% and 100%, respectively. The biofilm inhibition rate of CSQPG at 0.5 MIC against E. coli and S. aureus was 56.5% and 69.1%, respectively. At a concentration of 2.5 mg/mL, the biofilm removal rates of E. coli and S. aureus were 72.9% and 90.1%, respectively. The antibacterial and antibiofilm activities of CSQPG were better than CSBG and CBPyC, and the combination of guanidine and quaternary ammonium further improved the positive charge density of chitosan and enhanced its antibacterial activity.
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Affiliation(s)
- Lin Wang
- College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, PR China
| | - Meihua Xin
- College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, PR China.
| | - Mingchun Li
- College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, PR China.
| | - Tao Zhang
- College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, PR China
| | - Yu Pang
- College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, PR China
| | - Yangfan Mao
- The Instrumental Analysis Center, Huaqiao University, Xiamen, 361021, PR China
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Rath S, Sen S. Protocol for aqueous synthesis of bioactive quaternary ammonium betaine derivatives under blue LED. STAR Protoc 2024; 5:102890. [PMID: 38341848 PMCID: PMC10867440 DOI: 10.1016/j.xpro.2024.102890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 01/17/2024] [Accepted: 01/30/2024] [Indexed: 02/13/2024] Open
Abstract
Quaternary ammonium compounds exhibit diverse applications as antibiotics, as surfactants, in paper industries, in sewage treatment, and in aquaculture. Here, we present a protocol for synthesizing a library of bioactive quaternary ammonium betaine derivatives under blue LED in water. We describe steps for preparing diazo compounds, synthesizing glycine betaine derivatives, and isolating pure final compounds via precipitation from an aqueous reaction mixture. This protocol promotes a sustainable approach by using water as the reaction medium and room temperature reactions. For complete details on the use and execution of this protocol, please refer to Rath et al. (2023).1.
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Affiliation(s)
- Suchismita Rath
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India.
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Chan AKY, Tsang YC, Yu OY, Lo ECM, Leung KCM, Chu CH. Clinical evidence for silver diamine fluoride to reduce dentine hypersensitivity: A systematic review. J Dent 2024; 142:104868. [PMID: 38301767 DOI: 10.1016/j.jdent.2024.104868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/26/2024] [Accepted: 01/27/2024] [Indexed: 02/03/2024] Open
Abstract
OBJECTIVE To assess the clinical evidence for silver diamine fluoride (SDF) to reduce dentine hypersensitivity in adults. METHODS Two independent researchers searched the English literature in five databases (Scopus, PubMed, Web of Science, EMBASE and the Cochrane Library) up to 15th July 2023 for clinical trials investigating the desensitising effect of professionally applied SDF to manage dentine hypersensitivity in adults aged 18 or above at any follow-up period. The primary outcome was the change in dentine hypersensitivity between baseline and follow-up visits after SDF application regarding any validated pain outcome measures. The Cochrane guidelines were used for the risk of bias assessment. RESULTS Three hundred and thirty-one studies were identified, and four of them were finally included. Three of the included studies were rated as having a 'low risk' of bias. The SDF solution reduced dentine hypersensitivity in adults. The percentage reduction in dentine hypersensitivity ranged from 23 % to 56 % after a single application of SDF solution. Moreover, the SDF solution was more effective than potassium nitrate, potassium oxalate and glutaraldehyde plus hydroxyethyl methacrylate in reducing dentine hypersensitivity. Meta-analysis indicated a more significant reduction in visual analogue scales (1-10) by 1.35 (95 % CI:0.9-1.8; p<0.00001) after receiving the SDF application than controls. CONCLUSION The included clinical trials showed that SDF solution reduced dentine hypersensitivity in adults. However, clinical trials are few, and their protocol varied from one another. Further well-designed clinical trials should be conducted to provide more evidence on its use to manage dentine hypersensitivity. CLINICAL SIGNIFICANCE SDF is cleared as desensitizing agents by the US Food and Drug Administration to manage dentine hypersensitivity, which induces pain, limits food choice, and impacts the quality of life. Evidence from this systematic review informs clinicians and provides researchers insight for future research on SDF use for dentine hypersensitivity. THE INTERNATIONAL PROSPECTIVE REGISTER OF SYSTEMATIC REVIEWS (PROSPERO) REGISTRATION NUMBER: CRD42023462613.
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Affiliation(s)
- Alice Kit Ying Chan
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China
| | - Yiu Cheung Tsang
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China
| | - Ollie Yiru Yu
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China
| | - Edward Chin Man Lo
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China
| | - Katherine Chiu Man Leung
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China
| | - Chun Hung Chu
- Faculty of Dentistry, The University of Hong Kong, 3/F, The Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong, China.
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Quritum M, Abdella A, Amer H, El Tantawi M. Effect of silver diamine fluoride and nano silver fluoride on oral health-related quality of life of children with early childhood caries: A randomized clinical trial. J Dent 2024; 142:104878. [PMID: 38311016 DOI: 10.1016/j.jdent.2024.104878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 02/06/2024] Open
Abstract
OBJECTIVES Untreated caries in primary teeth is one of the most prevalent health problems in children worldwide. Silver diamine fluoride (SDF) non-invasively arrests caries but causes staining unlike Nano Silver Fluoride (NSF) which causes no stains. This study compared the effect of NSF and 38 % SDF on the oral health related quality of life (OHRQoL) of preschool children after 6 months. METHODS Children were included if they were younger than 4 years, with at least one active lesion, ICDAS score ≥3, attending nurseries in a rural area in Alexandria, Egypt. They were randomly assigned to receive NSF once at baseline, or SDF at baseline and after 6 months. The Arabic version of the Early Childhood Oral Health Impact Scale (A-ECOHIS) was used to assess the OHRQoL. The groups were compared using chi-square test and the effect of the intervention on OHRQoL was assessed using multiple linear regression. RESULTS 360 children were included, mean (SD) age = 42.3 (8.2) months. After 6 months, NSF had significantly lower A-ECOHIS scores than SDF in bivariate analysis (p< 0.05) and in regression analysis (B= -5.02, p = 0.001) after adjusting for confounders. There were significant reductions in the A-ECOHIS total and domains' scores in both study groups, except for the social interaction domain in the SDF group. CONCLUSION After 6-month, both agents significantly improved children's OHRQoL although NSF had a significantly better impact on OHRQoL than SDF. CLINICAL SIGNIFICANCE Patient-reported outcomes support the inclusion of the two agents among the options for ECC management with better effect on quality of life after NSF. TRIAL REGISTRATION The trial was registered in the clinicaltrials.gov registry (#NCT05255913).
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Affiliation(s)
- Maryam Quritum
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
| | - Ahmed Abdella
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Hala Amer
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Maha El Tantawi
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
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Kongyodsueb P, Poolthong S, Chumprasert S, Sae-Ear P, Tantilertanant Y. The effect of silver nanoparticles in addition to sodium fluoride on remineralization of artificial root dentin caries. Aust Dent J 2024; 69:56-66. [PMID: 37813824 DOI: 10.1111/adj.12985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2023] [Indexed: 10/11/2023]
Abstract
BACKGROUND Silver nanoparticle was developed to overcome the drawback of silver diamine fluoride. However, evidence is limited, especially in root caries. The aim of this study was to evaluate the remineralization effect of silver nanoparticles on root caries. MATERIALS AND METHODS Fifty-five root human dentin slices size 5 × 5 mm2 from patients aged over 60 years old were immersed in demineralized solution to create artificial caries. Specimens were allocated into five groups according to the remineralizing agents: silver diamine fluoride (SDF), silver nanoparticles solution (AgNPs), silver nanoparticle solution followed by sodium fluoride varnish (AgNPs+NaF), sodium fluoride varnish (NaF), and tap water. After 8 days of pH-cycling challenge, the microhardness test, lesion depth evaluation, dentin surface morphology, and elemental analysis were performed. Data was analysed using F-test One-way ANOVA followed by Tukey's post hoc test and paired T-test. RESULTS All test groups demonstrated a significantly higher microhardness value and lower lesion depth compared with the control group. AgNPs+NaF and NaF-treated groups showed lower efficacy than SDF. Crystal precipitation was presented in all groups composed of silver. CONCLUSION Addition of fluoride varnish did not benefit for silver nanoparticles in preventing further demineralization. SDF provides the highest effectiveness in elderly root carious dentin.
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Affiliation(s)
- P Kongyodsueb
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - S Poolthong
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - S Chumprasert
- Oral Biology Research Center, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - P Sae-Ear
- Oral Biology Research Center, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Y Tantilertanant
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
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Zhou Z, Zhang X, Zeng S, Xu Y, Nie W, Zhou Y, Chen P. Quaternary ammonium salts for water treatment with balanced rate of sterilization and degradation. Chemosphere 2024; 352:141386. [PMID: 38316276 DOI: 10.1016/j.chemosphere.2024.141386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 01/06/2024] [Accepted: 02/03/2024] [Indexed: 02/07/2024]
Abstract
The growing number of infections caused by drug-resistant bacteria which arise from the overuse of antibiotics has severely affected the normal operation of human society. The high antibacterial activity of QAS makes it promising as an alternative to antibiotics, but it suffers from secondary pollution due to its non-degradation. Here we have synthesized a class of gemini quaternary ammonium salts (GQAS) with different carbon chain lengths containing ester groups by using facile methylation reaction. Quaternary ammonium groups contribute to insert negatively charged bacterial membranes, resulting in membrane damage and bacteria death. Compared with conventional single-chain QAS, except for the more efficient antibacterial efficiency attribute to the presence of the second carbon chain, GQAS with alterable antibacterial properties can minimize the possibility of bacterial resistance and reduce the accumulation of GQAS in the environment through the introduction of degradable ester groups. GQAS is completely superior to the commercial bactericide benzalkonium chloride (BAC) in both antibacterial activity and degrade performance, which can be used as a more environmentally friendly bactericide.
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Affiliation(s)
- Zhenyang Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - XiRan Zhang
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Shaohua Zeng
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Ying Xu
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Wangyan Nie
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Yifeng Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Pengpeng Chen
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
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Han X, Mi Y, Ji Y, Sun M, Tang H, Dong F, Guo Z. A novel chitosan antioxidant bearing sulfhydryl group: Synthesis, characterization and activity assessment. Int J Biol Macromol 2024; 261:129816. [PMID: 38290626 DOI: 10.1016/j.ijbiomac.2024.129816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 01/04/2024] [Accepted: 01/26/2024] [Indexed: 02/01/2024]
Abstract
To improve the antioxidant activity, sulfhydryl groups (-SH) were introduced into chitosan. Acylated chitosan derivatives, chitosan cationic salt derivatives, hydroxypropyl trimethylammonium chloride chitosan quaternary ammonium salt (HACC) derivatives and N,N,N-trimethyl chitosan iodine (TMC) derivatives were obtained. The chitosan derivatives were characterized by FTIR and 1H NMR to confirm the successful synthesis. Ellman's reagent was used to determine that the compound contained free sulfhydryl groups. The water solubility and thermal stability of chitosan and derivatives were evaluated. The antioxidant activities of the derivatives were verified, including DPPH radical scavenging activity, superoxide anion radical scavenging activity and reducing power activity. The novel chitosan derivatives showed excellent antioxidant activities. Toxicity assay used L929 cells proved that the derivatives had no significant toxic. The results showed that the chitosan derivatives bearing sulfhydryl groups described in this paper has a certain antioxidant effect, which provides a practical approach for further study of chitosan.
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Affiliation(s)
- Xiangru Han
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingqi Mi
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuting Ji
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mingzhi Sun
- Yantai Fuhui Agricultural Technology Co., Ltd, Yantai 264100, China
| | - Hongxia Tang
- Yantai Fuhui Agricultural Technology Co., Ltd, Yantai 264100, China
| | - Fang Dong
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhanyong Guo
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Hirao R, Takeuchi H, Kawada J, Ishida N. Polypropylene-Rendered Antiviral by Three-Dimensionally Surface-Grafted Poly( N-benzyl-4-vinylpyridinium bromide). ACS Appl Mater Interfaces 2024; 16:10590-10600. [PMID: 38343039 PMCID: PMC10910468 DOI: 10.1021/acsami.3c15125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/28/2023] [Accepted: 02/02/2024] [Indexed: 03/01/2024]
Abstract
To inhibit viral infection, it is necessary for the surface of polypropylene (PP), a polymer of significant industrial relevance, to possess biocidal properties. However, due to its low surface energy, PP weakly interacts with other organic molecules. The biocidal effects of quaternary ammonium compounds (QACs) have inspired the development of nonwoven PP fibers with surface-bound quaternary ammonium (QA). Despite this advancement, there is limited knowledge regarding the durability of these coatings against scratching and abrasion. It is hypothesized that the durability could be improved if the thickness of the coating layer were controlled and increased. We herein functionalized PP with three-dimensionally surface-grafted poly(N-benzyl-4-vinylpyridinium bromide) (PBVP) by a simple and rapid method involving graft polymerization and benzylation and examined the influence of different factors on the antiviral effect of the resulting plastic by using a plaque assay. The thickness of the PBVP coating, surface roughness, and amount of QACs, which jointly determine biocidal activity, could be controlled by adjusting the duration and intensity of the ultraviolet irradiation used for grafting. The best-performing sample reduced the viral infection titer of an enveloped model virus (bacteriophage ϕ6) by approximately 5 orders of magnitude after 60 min of contact and retained its antiviral activity after surface polishing-simulated scratching and abrasion, which indicated the localization of QACs across the coating interior. Our method may expand the scope of application to resin plates as well as fibers of PP. Given that the developed approach is not limited to PP and may be applied to other low-surface-energy olefinic polymers such as polyethylene and polybutene, our work paves the way for the fabrication of a wide range of biocidal surfaces for use in diverse environments, helping to prevent viral infection.
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Affiliation(s)
- Rie Hirao
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Hisato Takeuchi
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Jumpei Kawada
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Nobuhiro Ishida
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
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10
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Patel J, Turton B, Cherian S, Anthonappa R. Silver Diamine Fluoride Staining With Potassium Iodide: A Prospective Cohort Study. Int Dent J 2024; 74:95-101. [PMID: 37748963 PMCID: PMC10829362 DOI: 10.1016/j.identj.2023.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/11/2023] [Accepted: 07/14/2023] [Indexed: 09/27/2023] Open
Abstract
BACKGROUND Staining after silver diamine fluoride (SDF) treatment limits treatment acceptability but is also used as a clinical indicator of lesion stability. Potassium iodide (KI) has been postulated to modify SDF staining. Understanding the natural history and resultant shade of SDF/KI-treated lesions will inform clinical decision-making. This study describes the change in colour of carious lesions in primary teeth treated with SDF and KI. METHODS One hundred carious lesions in primary teeth were treated with SDF + KI (Riva Star, SDI) and followed up over 6 months. Lesion shade was determined using standardised intraoral photography and broadly categorised into 4 shades: yellow, light brown, dark brown, and black. Lesions were digitally isolated, and colour was evaluated using CIELAB (L*: lightness, a*/b*: hue) and perceptible colour change (ΔE). RESULTS One hundred valid observations were analysed on 129 lesions included in the study. Lesions were excluded if subsequently restored (n = 15), teeth exfoliated (n = 2), exhibited pulpal exposure (n = 1), or failed to attend at follow-up visits (n = 11). At baseline, the shade of carious lesions was yellow (n = 22), light brown (n = 19), dark brown (n = 29), or black (n = 30). The changes in shade between baseline and 6 months were clinically perceptible to the human eye, with the mean ΔE being 12.2 (SD = 6.9). Neither tooth type, lesion severity, nor baseline shade was statistically associated with the degree of perceptible change at 6 months. CONCLUSIONS Carious lesions exhibited clinically significant changes in colour after application of SDF + KI, primarily attributed to differences in L* of lesions over the 6 months.
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Affiliation(s)
- Jilen Patel
- UWA Dental School, The University of Western Australia, Perth, Western Australia, Australia; Department of Dental Medicine, Perth Children's Hospital, Perth, Western Australia, Australia.
| | - Bathsheba Turton
- Office of Global and Population Health, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, United States
| | - Sarah Cherian
- Department of General Paediatrics, Perth Children's Hospital, Perth, Western Australia, Australia; UWA Medical School, Discipline of Paediatrics, The University of Western Australia, Perth, Western Australia, Australia; Wesfarmers Centre of Vaccines & Infectious Diseases, Telethon Kids Institute, Perth, Western Australia, Australia
| | - Robert Anthonappa
- UWA Dental School, The University of Western Australia, Perth, Western Australia, Australia; Department of Dental Medicine, Perth Children's Hospital, Perth, Western Australia, Australia
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11
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Chaves RD, Kumazawa SH, Khaneghah AM, Alvarenga VO, Hungaro HM, Sant'Ana AS. Comparing the susceptibility to sanitizers, biofilm-forming ability, and biofilm resistance to quaternary ammonium and chlorine dioxide of 43 Salmonella enterica and Listeria monocytogenes strains. Food Microbiol 2024; 117:104380. [PMID: 37918997 DOI: 10.1016/j.fm.2023.104380] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/28/2023] [Accepted: 09/05/2023] [Indexed: 11/04/2023]
Abstract
This study determined the susceptibility to sanitizers and biofilm-forming ability on stainless steel of 43 Salmonella enterica and Listeria monocytogenes strains. Besides, the biofilm resistance to sanitizers of four bacterial pathogen strains was evaluated. Four sanitizers commonly used in the food industry were tested: peracetic acid (PAA), chlorine dioxide (ClO2), sodium hypochlorite (SH), and quaternary ammonium compound (QAC). The susceptibility to sanitizers varied widely among the strains of both pathogens. On the other hand, the number of biofilm-associated cells on the stainless-steel surface was >5 log CFU/cm2 for all of them. Only one Salmonella strain and two L. monocytogenes strains stood out as the least biofilm-forming. The resistance of biofilms to sanitizers also varied among strains of each pathogen. Biofilms of L. monocytogenes were more susceptible to the disinfection process with ClO2 and QAC than those of Salmonella. However, no correlation was observed between the ability to form denser biofilm and increased sanitizer resistance. In general, chlorine compounds were more effective than other sanitizers in inactivating planktonic cells and biofilms.
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Affiliation(s)
- Rafael D Chaves
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Samuel H Kumazawa
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Amin Mousavi Khaneghah
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Verônica O Alvarenga
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil; Department of Food, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Humberto M Hungaro
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Anderson S Sant'Ana
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil.
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12
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Chen H, Hu P, Liu H, Liu S, Liu Y, Chen L, Feng L, Chen L, Zhou T. Combining with domiphen bromide restores colistin efficacy against colistin-resistant Gram-negative bacteria in vitro and in vivo. Int J Antimicrob Agents 2024; 63:107066. [PMID: 38135012 DOI: 10.1016/j.ijantimicag.2023.107066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/20/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023]
Abstract
Today, colistin is considered a last-resort antibiotic for treating multidrug-resistant (MDR) Gram-negative bacteria (GNB). However, the increased and improper use of colistin has led to the emergence of colistin-resistant (Col-R) GNB. Thus, it is urgent to develop new drugs and therapies in response to the ongoing emergence of colistin resistance. In this study, we investigated the antibacterial and antibiofilm activities of the quaternary ammonium compound domiphen bromide (DB) in combination with colistin against clinical Col-R GNB both in vitro and in vivo. Checkerboard assay and time-kill analysis demonstrated significant synergistic antibacterial effects of the colistin/DB combination. The synergistic antibiofilm activity was confirmed through crystal violet staining and scanning electron microscopy (SEM). Furthermore, the colistin/DB combination exhibited increased survival rates in infected larvae and reduced bacterial loads in a mouse thigh infection model. The cytotoxicity measurement and hemolysis test showed that the combination did not adversely affect cell viability at synergistic concentrations. The alkaline phosphatase (ALP) leak test and propidium iodide (PI) staining analysis further revealed that the colistin/DB combination enhanced the therapeutic effect of colistin by altering bacterial membrane permeability. The ROS assays revealed that the combination induced the accumulation of bacterial ROS, leading to bacterial death. In conclusion, our study is the first to identify DB as a colistin potentiator, effectively restoring the sensitivity of bacteria to colistin. It provides a promising alternative approach for combating Col-R GNB infections.
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Affiliation(s)
- Huanchang Chen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Panjie Hu
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Haifeng Liu
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Sichen Liu
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yan Liu
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lei Chen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Luozhu Feng
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lijiang Chen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Tieli Zhou
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
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13
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Pensato V, Laginestra MA, Falvo P, Orecchioni S, Talarico G, De Marchi E, Bruno S, Mongiorgi S, Mitola G, Bertolini F, Adinolfi E, Cavo M, Curti A, Salvestrini V. Bitter Taste Receptor Agonist Denatonium Inhibits Stemness Characteristics in Hematopoietic Stem/Progenitor Cells. Stem Cells 2024; 42:42-54. [PMID: 37798139 PMCID: PMC10787278 DOI: 10.1093/stmcls/sxad075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 09/11/2023] [Indexed: 10/07/2023]
Abstract
Bone marrow microenvironmental stimuli profoundly impact hematopoietic stem cell fate and biology. As G protein-coupled receptors, the bitter taste receptors (TAS2Rs) are key in transmitting extracellular stimuli into an intracellular response, within the oral cavity but also in extraoral tissues. Their expression in the bone marrow (BM)-derived cells suggests their involvement in sensing the BM microenvironmental fluctuation. In the present study, we demonstrated that umbilical cord blood (UCB)-derived CD34+ cells express fully functional TAS2Rs along with the signal transduction cascade components and their activation by the prototypical agonist, denatonium benzoate, significantly modulated genes involved in stemness maintenance and regulation of cell trafficking. The activation of these specific pathways was confirmed in functional in vitro experiments. Denatonium exposure exerted an antiproliferative effect on UCB-derived CD34+ cells, mainly affecting the most undifferentiated progenitor frequency. It also reduced their clonogenicity and repopulating potential in vitro. In addition, the TAS2R signaling activation impaired the UCB-derived CD34+ cell trafficking, mainly reducing the migration toward the chemoattractant agent CXCL12 and modulating the expression of the adhesion molecules CD62L, CD49d, and CD29. In conclusion, our results in UCB-derived CD34+ cells expand the observation of TAS2R expression in the setting of BM-resident cells and shed light on the role of TAS2Rs in the extrinsic regulation of hematopoietic stem cell functions.
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Affiliation(s)
- Valentina Pensato
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
- Institute of Hematology and Center for Hemato-Oncology Research, Department of Medicine and Surgery, University and Hospital of Perugia, Perugia, Italy
| | | | - Paolo Falvo
- Laboratory of Hematology-Oncology, European Institute of Oncology IRCCS, Milan, Italy
- Onco-Tech Lab, European Institute of Oncology IRCCS and Politecnico di Milano, Milan, Italy
| | - Stefania Orecchioni
- Laboratory of Hematology-Oncology, European Institute of Oncology IRCCS, Milan, Italy
- Onco-Tech Lab, European Institute of Oncology IRCCS and Politecnico di Milano, Milan, Italy
| | - Giovanna Talarico
- Laboratory of Hematology-Oncology, European Institute of Oncology IRCCS, Milan, Italy
- Onco-Tech Lab, European Institute of Oncology IRCCS and Politecnico di Milano, Milan, Italy
| | - Elena De Marchi
- Department of Medical Sciences, Section of Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Samantha Bruno
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - Sara Mongiorgi
- Department of Biomedical and Neuromotor Sciences - DIBINEM, University of Bologna, Bologna, Italy
| | - Giulia Mitola
- Laboratory of Hematology-Oncology, European Institute of Oncology IRCCS, Milan, Italy
- Onco-Tech Lab, European Institute of Oncology IRCCS and Politecnico di Milano, Milan, Italy
| | - Francesco Bertolini
- Laboratory of Hematology-Oncology, European Institute of Oncology IRCCS, Milan, Italy
- Onco-Tech Lab, European Institute of Oncology IRCCS and Politecnico di Milano, Milan, Italy
| | - Elena Adinolfi
- Department of Medical Sciences, Section of Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Michele Cavo
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia "Seràgnoli" Bologna, Italy
| | - Antonio Curti
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia "Seràgnoli" Bologna, Italy
| | - Valentina Salvestrini
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia "Seràgnoli" Bologna, Italy
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Ma B, Li Q, Zhang J, Mi Y, Tan W, Guo Z. Improvement of the Antioxidant and Antitumor Activities of Benzimidazole-Chitosan Quaternary Ammonium Salt on Drug Delivery Nanogels. Mar Drugs 2024; 22:40. [PMID: 38248665 PMCID: PMC10817266 DOI: 10.3390/md22010040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/07/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024] Open
Abstract
The present study focused on the design and preparation of acid-responsive benzimidazole-chitosan quaternary ammonium salt (BIMIXHAC) nanogels for a controlled, slow-release of Doxorubicin HCl (DOX.HCl). The BIMIXHAC was crosslinked with sodium tripolyphosphate (TPP) using the ion crosslinking method. The method resulted in nanogels with low polydispersity index, small particle size, and positive zeta potential values, indicating the good stability of the nanogels. Compared to hydroxypropyl trimethyl ammonium chloride chitosan-Doxorubicin HCl-sodium tripolyphosphate (HACC-D-TPP) nanogel, the benzimidazole-chitosan quaternary ammonium salt-Doxorubicin HCl-sodium tripolyphosphate (BIMIXHAC-D-TPP) nanogel show higher drug encapsulation efficiency and loading capacity (BIMIXHAC-D-TPP 93.17 ± 0.27% and 31.17 ± 0.09%), with acid-responsive release profiles and accelerated release in vitro. The hydroxypropyl trimethyl ammonium chloride chitosan-sodium tripolyphosphate (HACC-TPP), and benzimidazole-chitosan quaternary ammonium salt-sodium tripolyphosphate (BIMIXHAC-TPP) nanogels demonstrated favorable antioxidant capability. The assay of cell viability, measured by the MTT assay, revealed that nanogels led to a significant reduction in the cell viability of two cancer cells: the human lung adenocarcinoma epithelial cell line (A549) and the human breast cancer cell line (MCF-7). Furthermore, the BIMIXHAC-D-TPP nanogel was 2.96 times less toxic than DOX.HCl to the mouse fibroblast cell line (L929). It was indicated that the BIMIXHAC-based nanogel with enhanced antioxidant and antitumor activities and acidic-responsive release could serve as a potential nanocarrier.
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Affiliation(s)
- Bing Ma
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Qing Li
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Jingjing Zhang
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Yingqi Mi
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Wenqiang Tan
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Zhanyong Guo
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (B.M.); (Q.L.); (J.Z.); (Y.M.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
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15
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Strizzi S, Cappelletti G, Biasin M, Artasensi A, Fumagalli L, Casiraghi A. Evaluation of in vitro SARS-CoV-2 inactivation by a new quaternary ammonium compound: Bromiphen bromide. Arch Pharm (Weinheim) 2024; 357:e2300424. [PMID: 37828623 DOI: 10.1002/ardp.202300424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/14/2023]
Abstract
The pneumonia (COVID-19) outbreak caused by the novel coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which unpredictably exploded in late December of 2019 has stressed the importance of being able to control potential pathogens with the aim of limiting their spread. Although vaccines are well known as a powerful tool for ensuring public health and controlling the pandemic, disinfection and hygiene habits remain crucial to prevent infection from spreading and maintain the barrier, especially when the microorganism can persist and survive on textiles, surfaces, and medical devices. During the coronavirus disease pandemic, around half of the disinfectants authorized by the US Environmental Protection Agency contained quaternary ammonium compounds (QACs); their effectiveness had not been proven. Herein, the in vitro SARS-CoV-2 inactivation by p-bromodomiphen bromide, namely bromiphen (BRO), a new, potent, and fast-acting QAC is reported. This study demonstrates that BRO, with a dose as low as 0.02%, can completely inhibit SARS-CoV-2 replication in just 30 s. Its virucidal activity was 10- and 100-fold more robust compared to other commercially available QACs, namely domiphen bromide and benzalkonium chloride. The critical micellar concentration and the molecular lipophilicity potential surface area support the relevance of the lipophilic nature of these molecules for their activity.
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Affiliation(s)
- Sergio Strizzi
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - G Cappelletti
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - M Biasin
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Angelica Artasensi
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Laura Fumagalli
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
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Farahani HE, Asgharzadeh S, Golmoradizadeh R, Akrami S, Ghaznavi-Rad E, Mirkalantari S, Masjedian-Jazi F. Resistance to Chlorhexidine and Benzalkonium Chloride in E. Coli ST131, A. Baumannii, and P. Aeruginosa Isolates. Clin Lab 2024; 70. [PMID: 38213201 DOI: 10.7754/clin.lab.2023.230434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
BACKGROUND The goal was to assess the antimicrobial efficacy of two commonly used biocides, chlorhexidine, and benzalkonium chloride, against MDR isolates of Pseudomonas aeruginosa, Acinetobacter baumannii, and Escherichia coli ST131, as well as the prevalence of resistance genes. METHODS MIC of chlorhexidine and benzalkonium chloride and their effects on both the planktonic phase and biofilm were determined. Finally, the presence of genes responsible for resistance to quaternary ammonium compounds was investigated by PCR. RESULTS No significant relationship was observed between the presence of resistance genes and different concentrations of quaternary ammonium compounds (benzalkonium chloride). There was no association between biofilm formation and the presence of resistance genes. CONCLUSIONS Chlorhexidine digluconate and benzalkonium chloride at appropriate concentrations could prevent biofilm formation.
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17
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Li Z, Qu J, Qian L, Li Y, Liu J, Yao X, Zhang S, Valentin N, Song W. Multifunctional composite films based on polyvinyl alcohol, quaternary ammonium salt modified cellulose nanofibers and tannic acid-iron ion coordination complexes for food packaging. Int J Biol Macromol 2023; 253:126857. [PMID: 37703973 DOI: 10.1016/j.ijbiomac.2023.126857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/06/2023] [Accepted: 09/09/2023] [Indexed: 09/15/2023]
Abstract
The development of sustainable and well-performing food packaging materials takes on critical significance, whereas it is still challenging. To overcome the shortcomings of polyvinyl alcohol (PVA) as a degradable packaging material, in this work, hydrophobic quaternary ammonium salt (QAS) modified cellulose nanofibers (CNF) and tannic acid‑iron ion coordination complexes (TA-Fe) were adopted for the preparation of functional PVA films. The modified CNF (CNF-QAS) not only improved the mechanical properties and water resistance of PVA, but also endowed it with antibacterial ability. In addition, the synergistic antibacterial capability with CNF-QAS was achieved using TA-Fe with photothermal therapy. As a result, the modulus, elongation at break, tensile strength, and water contact angle of the prepared PVA films were examined as 88 MPa, 200 %, 11.7 MPa, and 94.8°, respectively. Furthermore, with the assistance of CNF-QAS and TA-Fe, the films inhibited the growth of E. coli and S. aureus by 99.8 % and 99.7 %, respectively, and they exhibited high cell viability of 90.5 % for L929 fibroblasts. Based on the above encouraging properties, the functional PVA films could significantly extend the shelf life of oranges for over two weeks, proving the excellent application prospects in the food packaging field.
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Affiliation(s)
- Zhiqiang Li
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Jiahui Qu
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Liwei Qian
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Yan Li
- National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Jingtao Liu
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xue Yao
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Sufeng Zhang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Nica Valentin
- Department of Physics, "Alexandru Ioan Cuza" University of Iasi, Carol I Blvd. 11, 700506 Iasi, Romania
| | - Wenqi Song
- Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, China.
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18
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Hyla K, Jama D, Grzywacz A, Janek T. Evaluation of the Antitumor Activity of Quaternary Ammonium Surfactants. Int J Mol Sci 2023; 24:17237. [PMID: 38139066 PMCID: PMC10743841 DOI: 10.3390/ijms242417237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
Quaternary ammonium surfactants, due to their diverse chemical structure and their biological properties, can be used in medicine as DNA carriers, disinfectants, and antimicrobial and antitumor agents. In this study, using melanoma A375, colon adenocarcinoma HT-29 and normal human dermal fibroblast (NHDF) cells, we tested the hypothesis that the quaternary ammonium surfactants 2-dodecanoyloxyethyl)trimethylammonium bromide (DMM-11), 2-dodecanoyloxypropyl)trimethylammonium bromide (DMPM-11) and 2-pentadecanoyloxymethyl)trimethylammonium bromide (DMGM-14) act selectively against cancer cells. The results showed that these compounds led to the initiation of the apoptotic process of programmed cell death, as evidenced by the ratio of the relative expression of Bax protein to Bcl-2. The encapsulation of surfactants in liposomes allowed lower concentrations to be used. Moreover, encapsulation reduced their toxicity towards non-cancerous cells. The anticancer efficiency and apoptotic effect of the liposomal formulations with surfactants (DMM-11, DMPM-11 and DMGM-14) were higher than those of surfactant-free liposomes. Therefore, quaternary ammonium surfactant-loaded liposomes show significant potential as delivery vehicles for the treatment of melanoma and colon cancers. The use of nano-formulations offers the advantage of optimizing quaternary ammonium surfactant delivery for improved anticancer therapy.
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Affiliation(s)
| | | | | | - Tomasz Janek
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, 51-630 Wrocław, Poland; (K.H.); (D.J.); (A.G.)
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Fernandes LDO, Mendes Soares IP, Anselmi C, Pires MLBA, Ribeiro RADO, Peruchi V, de Souza Costa CA, Hebling J. Pulp cell response to the application of silver diamine fluoride and potassium iodide on caries-like demineralized dentin. Clin Oral Investig 2023; 27:7295-7306. [PMID: 37853265 DOI: 10.1007/s00784-023-05320-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
OBJECTIVES To investigate the response of pulp cells to the application of silver diamine fluoride (SDF) and potassium iodide (KI) on demineralized dentin. MATERIALS AND METHODS The occlusal surfaces of human dentin discs (0.4 mm thick) with similar permeability were subjected to an artificial caries protocol, and then the discs were adapted into artificial pulp chambers. MDPC-23 cells were seeded on the healthy pulp dentin surface, while the demineralized surface was treated with SDF, KI, SDF + KI, or hydrogen peroxide (positive control-PC) (n = 8). The negative control (NC) received ultrapure water. After 24 h, cell viability (alamarBlue) and morphology (SEM) were evaluated. The extracts were then applied to new MDPC-23 cells seeded in culture plates to assess their viability and the formation of mineralized nodules (MN; Alizarin Red) after seven days. The data were analyzed using one-way analysis of variance/Tukey or Games-Howell tests (α = 5%). RESULTS SDF and PC significantly reduced the viability of cells seeded on discs (45.6% and 71.0%, respectively). Only cells treated with SDF or PC detached from the dentin substrate, while the remaining cells showed altered morphology. Cells in contact with extracts showed less reduction in viability, but it was still more toxic compared to NC. Only PC reduced MN deposition. SDF + KI or KI alone did not affect the cell response. CONCLUSIONS SDF applied alone showed a mild to moderate transdentinal cytotoxic effect on pulp cells. However, the combination of SDF + KI reduced the cytotoxic effects. Both materials used alone or in combination did not affect the mineralization ability of pulp cells. CLINICAL RELEVANCE Besides improving esthetic results, associating potassium iodide with silver diamine fluoride may reduce the transdentinal cytotoxic effects of this cariostatic agent on pulp cells.
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Affiliation(s)
- Lídia de Oliveira Fernandes
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Igor Paulino Mendes Soares
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Caroline Anselmi
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil
| | - Maria Luiza Barucci Araujo Pires
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil
| | | | - Victória Peruchi
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | | | - Josimeri Hebling
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil.
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Feng ZJ, Wang LS, Ma X, Li K, Li XY, Tang Y, Peng CJ. Catapol attenuates the aseptic inflammatory response to hepatic I/R injury in vivo and in vitro by inhibiting the HMGB1/TLR-4/NF-κB signaling pathway via the microRNA-410-3p. Mol Immunol 2023; 164:66-78. [PMID: 37979473 DOI: 10.1016/j.molimm.2023.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/31/2023] [Accepted: 11/07/2023] [Indexed: 11/20/2023]
Abstract
BACKGROUND Hepatic ischemia-reperfusion (I/R) injury involves inflammatory necrosis of liver cells as a significant pathological mechanism. Catapol possesses anti-inflammatory activity that is extracted from the traditional Chinese medicine, Rehmannia glutinosa. METHODS The liver function and histopathology, Oxidative stress, and aseptic inflammatory responses were assessed in vivo, and the strongest dose group was selected. For mechanism, the expression of miR-410-3p, HMGB1, and TLR-4/NF-κB signaling pathways was detected. The dual luciferase assay can verify the targeting relationship between miR-410-3p and HMGB1. Knockdown of miR-410-3p in L02 cells is applied in interference experiments. RESULTS CAT pre-treatment significantly decreased the liver function markers alanine and aspartate aminotransferases and reduced the areas of hemorrhage and necrosis induced by hepatic I/R injury. Additionally, it reduced the aseptic inflammatory response and oxidative stress, with the strongest protective effect observed in the high-dose CAT group. Mechanistically, CAT downregulates HMGB1, inhibits TLR-4/NF-κB signaling pathway activation, and reduces inflammatory cytokines TNF-α, and IL-1β. In addition, the I/R-induced downregulation of microRNA-410-3p was inhibited by CAT pre-treatment in vivo and in vitro. HMGB1 was identified as a potential target of microRNA-410-3p using a dual-luciferase reporter assay. Knockdown of microRNA-410-3p abolished the inhibitory effect of CAT on HMGB1, p-NF-κB, and p-IκB-α protein expression. CONCLUSIONS Our study showed that CAT pre-treatment has a protective effect against hepatic I/R injury in rats. Specifically, CAT attenuates the aseptic inflammatory response to hepatic I/R injury in vivo and in vitro by inhibiting the HMGB1/TLR-4/NF-κB signaling pathway via the microRNA-410-3p.
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Affiliation(s)
- Zan Jie Feng
- Clinical Medical Research Center, Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Liu Song Wang
- Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xuan Ma
- Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Kai Li
- Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xin Yao Li
- Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Yi Tang
- Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Ci Jun Peng
- Department of Hepatobiliary Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang, China.
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21
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Cabalén MB, Molina GF, Piscitelli V, Rossa M, Aranguren JP, Palma SD, Pino GA, Picca M, Burrow MF. Application of 20% silver nanoclusters in polymethacrylic acid on simulated dentin caries; its penetration depth and effect on surface hardness. Sci Rep 2023; 13:21126. [PMID: 38036660 PMCID: PMC10689463 DOI: 10.1038/s41598-023-48519-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/27/2023] [Indexed: 12/02/2023] Open
Abstract
The aims of this study were: To evaluate the surface hardness of simulated dentin caries lesions treated with either silver nanoclusters (AgNCls) synthesized in polymethacrylic acid (PMAA) or 38% silver diammine fluoride (SDF), as well as observe the penetration of the treatment solutions into the simulated caries lesions. Dentin blocks 4 mm thick obtained from caries-free third molars were sectioned and then simulated caries lesions on the occlusal dentin surfaces were created. Each specimen (n = 8) was divided into four sections: (A) treated with 20% AgNCls/PMAA; (B) treated with SDF 38% (FAgamin, Tedequim, Cordoba, Argentina); (C) sound tooth protected by nail-varnish during artificial caries generation (positive control); and (D) artificial caries lesion without surface treatment (negative control). AgNCls/PMAA or SDF were applied on the simulated lesions with a microbrush for 10 s, then excess removed. The surface hardness was measured by means of Vickers indentation test. To trace the depth of penetration, up to 400 μm, of silver ions, elemental composition of the samples was observed using EDX, coupled with SEM, and measured every 50 μm from the surface towards the pulp chamber. Laser Induced Breakdown Spectroscopy (LIBS) was also employed to trace silver ion penetration; the atomic silver line 328.06 nm was used with a 60 μm laser spot size to a depth of 240 μm. Student's-t test identified significant differences between treatment groups for each depth and the Bonferroni test was used for statistical analysis of all groups (p < 0.05). Mean surface hardness values obtained were 111.2 MPa, 72.3 MPa, 103.3 MPa and 50.5 MPa for groups A, B, C and D respectively. There was a significant difference between groups A and C compared with groups B and D, the group treated with AgNCls/PMAA achieved the highest surface hardness, similar or higher than the sound dentin control. A constant presence of silver was observed throughout the depth of the sample for group A, while group B showed a peak concentration of silver at the surface with a significant drop beyond 50 μm. The 20% AgNCls/PMAA solution applied to simulated dentin caries lesions achieved the recovery of surface hardness equivalent to sound dentin with the penetration of silver ions throughout the depth of the lesion.
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Affiliation(s)
- Maria Belén Cabalén
- Becaria CONICET, Facultad de Ciencias de la Salud, Universidad Católica de Córdoba, Córdoba, Argentina
| | - Gustavo Fabian Molina
- Facultad de Ciencias de la Salud, Universidad Católica de Córdoba, Córdoba, Argentina.
- The Faculty of Dentistry, University of Hong Kong, Pok Fu Lam, Hong Kong SAR, China.
| | - Vincent Piscitelli
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de La Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- INFIQC: Instituto de Investigaciones en Fisicoquímica de Córdoba (CONICET - UNC), Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- Departamento de Fisicoquímicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Maximiliano Rossa
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de La Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- INFIQC: Instituto de Investigaciones en Fisicoquímica de Córdoba (CONICET - UNC), Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- Departamento de Fisicoquímicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Juan Pablo Aranguren
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de La Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- INFIQC: Instituto de Investigaciones en Fisicoquímica de Córdoba (CONICET - UNC), Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- Departamento de Fisicoquímicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Santiago Daniel Palma
- INFIQC: Instituto de Investigaciones en Fisicoquímica de Córdoba (CONICET - UNC), Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- Departamento de Fisicoquímicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Gustavo Ariel Pino
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de La Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- INFIQC: Instituto de Investigaciones en Fisicoquímica de Córdoba (CONICET - UNC), Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
- Departamento de Fisicoquímicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Pabellón Argentina, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Mariana Picca
- Cátedra de Materiales Dentales, Facultad de Odontología, Universidad de Buenos Aires, Buenos Aires, Argentina
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Allen RA, McCormack CEM, Wuest WM. Deriving Novel Quaternary Ammonium Compound Disinfectant Scaffolds from a Natural Product: Mechanistic Insights of the Quaternization of Ianthelliformisamine C. ChemMedChem 2023; 18:e202300253. [PMID: 37770411 PMCID: PMC10841702 DOI: 10.1002/cmdc.202300253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/28/2023] [Accepted: 09/28/2023] [Indexed: 09/30/2023]
Abstract
In the search for novel quaternary ammonium compound (QAC) disinfectants that can evade bacterial resistance, we turned to natural products as a source of inspiration. Herein we used natural product ianthelliformisamine C as a scaffold to design a small library of QACs. We first synthesized ianthelliformisamine C via an amide coupling that allowed for facile purification without the need for protecting groups. We then alkylated and quaternized the internal amines to yield four novel QACs, but all but one demonstrated no antibacterial activity against the tested strains. Using a combination of membrane depolarization and permeabilization assays, we were able to demonstrate that ianthelliformisamine C and the active QAC analog enact cell death via membrane permeabilization, contrary to prior reports on ianthelliformisamine C's mechanism of action.
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Affiliation(s)
- Ryan A Allen
- Department of Chemistry, Emory University, 30322, Atlanta, GA, USA
| | | | - William M Wuest
- Department of Chemistry, Emory University, 30322, Atlanta, GA, USA
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23
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Camatta IB, Nobre-Dos-Santos M, Steiner-Oliveira C. Influence of the Salivary Acquired Pellicle on the Inhibition/Progression of In Vitro Carious Dentin Treated with Silver Diamine Fluoride. Pediatr Dent 2023; 45:524-530. [PMID: 38129757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Purpose: To evaluate, in vitro, whether the presence of the acquired pellicle (AP) interferes with the effect of 38 percent silver diamine fluoride (SDF) on the inhibition or progression of carious dentin. Methods: Carious dentin specimens were divided into groups: C-no treatment control; FV-fluoride varnish; AP-acquired pellicle formation; SDF only, and APSDF-SDF plus acquired pellicle formation. After AP formation (AP and APSDF groups), all groups were subjected to pH cycling. Dentin mineral gain or loss was quantified using surface microhardness (SM). Concentrations of fluoride calcium (CaF₂) and fluorapatite (FAp) fluoride retained in dentin and fluoride concentrations in de- and remineralizing solutions were determined. Results: Groups AP, FV, SDF, and APSDF showed reduced demineralization compared with the C group, but the AP group showed greater surface loss than the fluoridated groups. Groups FV, SDF, and APSDF showed greater mineral recovery than C and AP groups (P<0.05), but no differences were observed between the FV, SDF, and APSDF groups (P>0.05). The retained CaF₂ and FAp were greater in the groups treated with fluoride, but there was no difference between the SDF and APSDF groups. Conclusion: The presence of the acquired pellicle reduced the progression of carious dentin lesion but did not influence its remineralization when associated with silver diamine fluoride.
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Affiliation(s)
| | - Marinês Nobre-Dos-Santos
- Department of Health Sciences and Pediatric Dentistry, at the Piracicaba Dental School, University of Campinas, Areião, Piracicaba, São Paulo, Brazil
| | - Carolina Steiner-Oliveira
- Department of Health Sciences and Pediatric Dentistry, at the Piracicaba Dental School, University of Campinas, Areião, Piracicaba, São Paulo, Brazil
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24
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Samaddar K, Kar S, Zahir S, Rao D. A quantitative evaluation of the effects of potassium iodide on the clinical properties of silver diamine fluoride. Gen Dent 2023; 71:68-72. [PMID: 37889247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Silver diamine fluoride (SDF), an effective topical fluoride agent for arresting caries, has a reputation for staining the teeth. Potassium iodide (KI) has been reported to minimize such staining, but doubts remain over its long-term efficacy and potential adverse influence on the effectiveness of SDF. This in vitro study used quantitative evaluation of color changes and the silver and fluoride release of treated tooth specimens to determine the effect of KI on the staining and caries-arresting properties of SDF. Twenty-one noncarious premolars were sectioned buccolingually to create 42 tooth specimens that were divided into 3 groups for color comparison and ion release measurements. The specimens in the experimental group were treated with a combined SDF + KI product (n = 16), the specimens in the positive control group were treated with SDF (n = 16), and the specimens in the negative control group were untreated (n = 10). Digital color analysis was performed weekly for a month according to the CIE L*a*b* color system of the International Commission on Illumination. Atomic spectrophotometry and ion-selective electrodes were used to measure the quantity of fluoride and silver ions released after 24 and 48 hours. The data from the color measurements were analyzed with the Friedman and Fisher tests, while the data from the ion release measurements were analyzed with the Mann-Whitney U and Wilcoxon signed rank tests. The analysis revealed that KI reduced the dentinal staining caused by SDF, but its effectiveness decreased over time as evidenced by the significantly deteriorating perceptual lightness (L*) values of SDF + KI-treated tooth specimens. The SDF + KI-treated specimens released significantly less silver and fluoride ions than the SDF-treated specimens. Because KI lost its stain-reducing property over time and reduced the effectiveness of SDF, a better "antidote" to SDF staining is needed.
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25
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Wilkinson RC, Meldrum K, Maggs CJ, Thomas NE, Thomas BR, De Mello N, Joyce N. Determining the efficacy of disinfectants at nucleic acid degradation. J Appl Microbiol 2023; 134:lxad244. [PMID: 37884448 DOI: 10.1093/jambio/lxad244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 10/06/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023]
Abstract
AIMS Nucleic acids, particularly antibiotic resistance genes, are commonly found on surfaces within healthcare environments, with levels not reducing following cleaning. Within the UK, there are no regulations for testing disinfectants against nucleic acids. METHODS AND RESULTS A series of commonplace in vitro methods were used to determine disinfectant-induced physical and functional damage to various nucleic acids; RNA (10 μg), genomic DNA (2 μg), and plasmids (1 μg). Using these methods, the optimal residence time (10 minutes) and working concentration (10%) were determined for a new disinfectant. Furthermore, comparison of disinfectants with different active ingredients including lactic acid (LA), sodium hydroxide (NaOH), chloroxylenol (PCMX), and quaternary ammonium compounds (QACs), were compared to controls. All disinfectants showed greater degradation by gel electrophoresis of genomic DNA and RNA than of purified plasmids. Functional analysis using quantitative polymerase chain reaction (qPCR) and polymerase chain reaction (PCR) demonstrated that no disinfectant tested (apart from control) could damage DNA to the level where PCR amplification was not possible, and only the NaOH reagent could achieve this for RNA. CONCLUSIONS The set of methods described herein provides a platform for future standardization and potential regulation regarding monitoring cleaning solutions for their activity against nucleic acids.
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Affiliation(s)
- Rachael C Wilkinson
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Kirsty Meldrum
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Caitlin J Maggs
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Nerissa E Thomas
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Bethan R Thomas
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Natalie De Mello
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Naomi Joyce
- Healthcare Technology Centre, Swansea University Medical School, Swansea University, Swansea SA2 8PP, United Kingdom
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26
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Nemchenko UM, Voropaeva NM, Sitnikova KO, Belkova NL, Savilov ED. Testing a Method for Evaluation of the Viability of Biofilm-Forming Bacteria after Exposure to Disinfectants. Bull Exp Biol Med 2023; 176:60-63. [PMID: 38091139 DOI: 10.1007/s10517-023-05967-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Indexed: 12/19/2023]
Abstract
A method for determining the viability of opportunistic pathogenic bacteria at the stage of biofilm formation after exposure to disinfectants with different active components was tested. The method is based on oxidation of tetrazolium salts by metabolically active cells with the formation of colored formazan derivatives and their quantitative spectrophotometry. The cell viability in the biofilm decreased after exposure to quaternary ammonium compounds and chlorine-containing disinfectants, but their effect was reversible. Dissemination of cells that had retained viability from the biofilm occurred after 24 h. The algorithm of testing, necessary controls, counting, and data interpretation are specified. The method can be recommended for use in laboratory diagnostics and clinical practice.
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Affiliation(s)
- U M Nemchenko
- Scientific Center for Family Health and Human Reproduction Problems, Irkutsk, Russia.
| | - N M Voropaeva
- Scientific Center for Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - K O Sitnikova
- Scientific Center for Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - N L Belkova
- Scientific Center for Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - E D Savilov
- Scientific Center for Family Health and Human Reproduction Problems, Irkutsk, Russia
- Irkutsk State Medical Academy of Postgraduate Education, Branch of Russian Medical Academy of Continuous Professional Education, Ministry of Health of the Russian Federation, Moscow, Russia
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27
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Copes WE, Ojiambo PS. A Systematic Review and Quantitative Synthesis of the Efficacy of Quaternary Ammonium Compounds in Disinfesting Nonfungal Plant Pathogens. Plant Dis 2023; 107:3176-3187. [PMID: 36890133 DOI: 10.1094/pdis-12-21-2751-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
This quantitative review and systematic analysis of the effectiveness of quaternary ammonium compounds (QACs) in disinfesting nonfungal plant pathogens in agricultural and horticultural cropping systems is a complementary follow-up to a previous study that evaluated the efficacy of QACs against fungal plant pathogens. In the present study, a meta-analysis involving 67 studies was conducted to assess the overall efficacy of QACs against plant pathogenic bacteria, oomycetes, and viruses and to identify factors associated with observed differences in product efficacy. Across all studies, QACs resulted in a significant (P < 0.0001) reduction in either disease intensity or propagule viability with a mean Hedges' g ([Formula: see text]) of 1.75, indicating that overall QAC treatments were moderately effective against nonfungal pathogens. Significant differences in product efficacy were observed between organism types (P = 0.0001), with QAC interventions resulting in higher efficacy (P = 0.0002) against oomycetes ([Formula: see text] = 4.20) than against viruses ([Formula: see text] = 1.42) and bacteria ([Formula: see text] = 1.07), which were not different (P = 0.2689) from each other. As a result, bacterium and virus types were combined into a composite set (BacVir). QAC intervention against BacVir resulted in significant differences in efficacy within categorical moderator subgroups for genus (P = 0.0133), target material (P = 0.0001), and QAC product generation (P = 0.0281). QAC intervention against oomycetes resulted in significant differences in efficacy only for genus (P < 0.0001). For the BacVir composite, five random effect (RE) meta-regression models were significant (P = 0.05), where models with dose and time, dose and genus, time and genus, dose and target, and time and target accounted for 62, 61, 52, 83, and 88%, respectively, of the variance in true effect sizes (R2) associated with [Formula: see text]. For oomycetes, three RE meta-regression models were significant (P = 0.05), where models with dose and time, dose and genus, and time and genus accounted for 64, 86, and 90%, respectively, of R2 associated with [Formula: see text]. These results show that while QACs are moderately effective against nonfungal plant pathogens, the observed variability in their efficacy due to dose of active ingredient and contact time of these products can be influenced by organism type, genus within organism type, the target being treated, and the generation of QAC products.
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Affiliation(s)
- Warren E Copes
- United States Department of Agriculture, Agricultural Research Service, Poplarville, MS 39470
| | - Peter S Ojiambo
- Center for Integrated Fungal Research, Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695
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28
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Castro VS, Conte CA, de Souza Figueiredo EE, Yang X, Stanford K. Efficacy of Quaternary Ammonium Compounds for Control of Individual and Mixed Cultures of Escherichia coli with High- and Low-Quaternary Ammonium Compounds Resistance. Foodborne Pathog Dis 2023; 20:261-269. [PMID: 37379475 DOI: 10.1089/fpd.2023.0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023] Open
Abstract
Escherichia coli is a well-characterized micro-organism in scientific literature. Similarly, quaternary ammonium compounds (QACs) are historical sanitizers in food processing. However, the use of QACs has been questioned due to bacterial resistance in some studies. Therefore, this study aimed to compare effects of single and mixed cultures of E. coli strains of different serogroups with either high (six strains) or low (five strains) resistance to QACs. Twenty-five combinations of strains with either high (H)- or low (L)-QAC resistance were analyzed (H + H vs. L + L). After exposure to QAC, combinations with statistical differences (p < 0.05) compared with individuals were selected and an inactivation model determined using GInaFit®. Only one combination of two strains (C23 and C20) with low-QAC resistance (mixture T18) had greater resistance (p < 0.05) than the individual isolates. The combination T18 and individual strain C23 presented a Weibull model, whereas the other isolated strain (C20) presented a biphasic inactivation model with a shoulder. Whole genome sequencing determined that unlike C20, C23 carried yehW, which may have led to Weibull inactivation. Possibly, very rapid interaction of C20 with the QAC favored increased survival of C23 and overall persistence of the T18 mixture. Consequently, our results indicate that individual E. coli with low-QAC resistance can synergistically interfere with QAC inactivation.
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Affiliation(s)
- Vinicius Silva Castro
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Carlos Adam Conte
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Xianqin Yang
- Science and Technology Branch, Agriculture and AgriFood Canada, Lacombe, Alberta, Canada
| | - Kim Stanford
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
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Seferyan MA, Saverina EA, Frolov NA, Detusheva EV, Kamanina OA, Arlyapov VA, Ostashevskaya II, Ananikov VP, Vereshchagin AN. Multicationic Quaternary Ammonium Compounds: A Framework for Combating Bacterial Resistance. ACS Infect Dis 2023; 9:1206-1220. [PMID: 37161274 DOI: 10.1021/acsinfecdis.2c00546] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
During previous stages of research, high biocidal activity toward microorganism archival strains has been used as the main indicator in the development of new antiseptic formulations. Although this factor remains one of the most important characteristics of biocide efficiency, the scale of antimicrobial resistance spread causes serious concern. Therefore, focus shifts toward the development of formulations with a stable effect even in the case of prolonged contact with pathogens. Here, we introduce an original isocyanuric acid alkylation method with the use of available alkyl dichlorides, which opened access to a wide panel of multi-QACs with alkyl chains of various lengths between the nitrogen atoms of triazine and pyridine cycles. We used a complex approach for the resulting series of 17 compounds, including their antibiofilm properties, bacterial tolerance development, and antimicrobial activity toward multiresistant pathogenic strains. As a result of these efforts, available compounds have shown higher levels of antibacterial activity against ESKAPE pathogens than widely used commercial QACs. Hit compounds possessed high activity toward clinical bacterial strains and have also demonstrated a long-term biocidal effect without significant development of microorganism tolerance. The overall results indicated a high level of antibacterial activity and the broad application prospects of multi-QACs based on isocyanuric acid against multiresistant bacterial strains.
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Affiliation(s)
- Mary A Seferyan
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
| | - Evgeniya A Saverina
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
- Tula State University, Lenin pr. 92, 300012 Tula, Russia
| | - Nikita A Frolov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
| | - Elena V Detusheva
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, 142279 Serpukhov, Moscow Region, Russia
| | | | | | - Irina I Ostashevskaya
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
- Faculty of Chemistry, Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia
| | - Valentine P Ananikov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky pr. 47, 119991 Moscow, Russia
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Jepkes S, Josee-Lemoy M, Knych H, de Lucena T, Ardeshir A, Stockinger DE. The Pharmacokinetics of Subcutaneous Methylnaltrexone Bromide in Rhesus Macaques ( Macaca mulatta). J Am Assoc Lab Anim Sci 2023; 62:260-266. [PMID: 37080736 PMCID: PMC10230534 DOI: 10.30802/aalas-jaalas-22-000111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/13/2023] [Accepted: 01/23/2023] [Indexed: 04/22/2023]
Abstract
Opioids are an integral component of pain management for nonhuman primates. These potent analgesics also adverse gastrointestinal (GI) effects that include constipation, bloating, and delayed gastric emptying. Methylnaltrexone bromide (MNTX) is a selective, peripherally acting μ- and κ-opioid receptor antagonist that can be used to mitigate the GI effects associated with opioid administration. Unlike naltrexone, a similar drug in this class, MNTX possesses an N-methyl-quaternary amine group that prevents it from crossing the blood brain barrier. This blockage allows inhibition of peripheral GI opioid receptors without affecting opioid-mediated analgesia in the central nervous system. We conducted a pharmacokinetic analysis of MNTX in serum and CSF of 6 healthy juvenile male rhesus macaques after subcutaneous administration of a 0.15-mg/kg dose. We hypothesized that the macaques would demonstrate a Tmax of 0.5 h, similar to that of humans, and that no MNTX would be detected in the CSF. This treatment resulted in a peak serum concentration of 114 ± 44 ng/mL at 0.25 ± 0.00 h; peak CSF at concentrations were 0.34 ± 0.07 ng/mL at the Tmax. These data show that subcutaneous administration of MNTX to rhesus macaques may block peripheral adverse effects of opioids without interfering with their central analgesic effects.
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Affiliation(s)
- Sarah Jepkes
- Primate Medicine Services, California National Primate Research Center, University of California, Davis, California
| | - Marie Josee-Lemoy
- Primate Medicine Services, California National Primate Research Center, University of California, Davis, California
| | - Heather Knych
- California Animal Health and Food Safety Lab Molecular Biosciences, University of California, Davis, California
| | - Thiago de Lucena
- Division of Economics, San Diego State University, San Diego, California; and
| | - Amir Ardeshir
- Infectious Disease Unit, California National Primate Research Center, University of California, Davis, California
| | - Diane E Stockinger
- Primate Medicine Services, California National Primate Research Center, University of California, Davis, California
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Siddiqui R, Makhlouf Z, Akbar N, Khamis M, Ibrahim T, Khan AS, Khan NA. Antiamoebic properties of Methyltrioctylammonium chloride based deep eutectic solvents. Cont Lens Anterior Eye 2023; 46:101758. [PMID: 36243521 DOI: 10.1016/j.clae.2022.101758] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 09/06/2022] [Accepted: 09/09/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE This aim of this study was to assess anti-parasitic properties of deep eutectic solvents against eye pathogen, Acanthamoeba, often associated with the use of contact lens. METHODS Assays were performed to investigate the effects of various Methyltrioctylammonium chloride-based deep eutectic solvents on Acanthamoeba castellanii, comprising amoebicidal assays, encystment assays, excystment assays, cytotoxicity assays by measuring lactate dehydrogenase release from human cells, and cytopathogenicity assays to determine parasite-mediated host cell death. RESULTS In a 2 h incubation period, DES-B, DES-C, DES-D, and DES-E exhibited up to 85 % amoebicidal activity at micromolar doses, which was enhanced further following 24 h incubation. When tested in encystment assays, selected deep eutectic solvents abolished cyst formation and were able to block excystment of A. castellanii. All solvents exhibited minimal human cell cytotoxicity except DES-D. Finally, all tested deep eutectic solvents inhibited amoeba-mediated cytopathogenicity, except DES-B. CONCLUSIONS Deep eutectic solvents show potent antiamoebic effects. These findings are promising and could lead to the development of novel contact lens disinfectants, as well as opening several avenues to explore the molecular mechanisms, various doses and incubation periods, and use of different bases against Acanthamoeba castellanii.
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Affiliation(s)
- Ruqaiyyah Siddiqui
- College of Arts and Sciences, American University of Sharjah, University City, Sharjah 26666, United Arab Emirates; Istinye Faculty of Medicine, Istinye University, Istanbul, Turkey
| | - Zinb Makhlouf
- College of Arts and Sciences, American University of Sharjah, University City, Sharjah 26666, United Arab Emirates
| | - Noor Akbar
- College of Arts and Sciences, American University of Sharjah, University City, Sharjah 26666, United Arab Emirates
| | - Mustafa Khamis
- College of Arts and Sciences, American University of Sharjah, University City, Sharjah 26666, United Arab Emirates
| | - Taleb Ibrahim
- Department of Chemical Engineering, College of Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Amir Sada Khan
- Department of Chemical Engineering, College of Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates; Department of Chemistry, University of Science & Technology, Banuu 28100, Khyber Pakhtunkhwa, C
| | - Naveed Ahmed Khan
- Department of Clinical Sciences, College of Medicine, University of Sharjah, University, City, Sharjah 27272, United Arab Emirates; Istinye Faculty of Medicine, Istinye University, Istanbul, Turkey..
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Miatmoko A, Asmoro FH, Azhari AA, Rosita N, Huang CS. The effect of 1,2-dioleoyl-3-trimethylammonium propane (DOTAP) Addition on the physical characteristics of β-ionone liposomes. Sci Rep 2023; 13:4324. [PMID: 36922639 PMCID: PMC10017702 DOI: 10.1038/s41598-023-31560-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 03/14/2023] [Indexed: 03/17/2023] Open
Abstract
β-ionone (ION) is a cyclic terpenoid compound that demonstrates considerable potential for the prevention and treatment of cancer. However, the water solubility of β-ionone is poor and the compound demonstrates low permeability. Liposomes have been reported as increasing both qualities. In this study, the development of β-ionone liposomes was initiated by adding 1,2-dioleoyl-3-trimethylammonium propane (DOTAP) to produce cationic liposomes as a means of enhancing binding to cancer cells. Liposomes composed of β-ionone, HSPC, cholesterol, and DSPE-mPEG2000 were prepared using the thin layer hydration method. Cellular uptake studies were carried out with HeLa cells incubated with β-ionone liposomes for two hours. The results indicated that the addition of DOTAP increased particle size and affected the spectroscopical and thermogram profiles of the liposomes, thereby confirming reduction in liposome crystallinity, while the zeta potential became positive. Moreover, the calcein release profile further showed that additional DOTAP increased both membrane fluidity and cellular uptake in HeLa cells In conclusion, adding DOTAP affected the physicochemical cationic properties of liposome and improved cellular uptake in HeLa cells.
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Affiliation(s)
- Andang Miatmoko
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Campus C UNAIR, Surabaya, 60115, Indonesia.
- Stem Cell Research and Development Center, Universitas Airlangga, Campus C UNAIR, Surabaya, 60115, Indonesia.
| | - Febe Harum Asmoro
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Campus C UNAIR, Surabaya, 60115, Indonesia
| | - Andre Alwi Azhari
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Campus C UNAIR, Surabaya, 60115, Indonesia
| | - Noorma Rosita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Campus C UNAIR, Surabaya, 60115, Indonesia
| | - Chin-Shiu Huang
- Department of Food Nutrition and Health Biotechnology, Asia University, Liofang Road, Wufeng District, Taichung, 413545, Taiwan
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Thierer LM, Petersen AA, Michaud ME, Sanchez CA, Brayton SR, Wuest WM, Minbiole KPC. Atom Economical QPCs: Phenyl-Free Biscationic Quaternary Phosphonium Compounds as Potent Disinfectants. ACS Infect Dis 2023; 9:609-616. [PMID: 36757826 PMCID: PMC10032568 DOI: 10.1021/acsinfecdis.2c00575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Quaternary ammonium compounds (QACs) are vital disinfectants for the neutralization of pathogenic bacteria in clinical, domestic, and commercial settings. After decades of dependence on QACs, the emergence of antimicrobial resistance to this class of compounds threatens the ability of existing QAC products to effectively manage rising bacterial threats. The need for new disinfectants is therefore urgent, with quaternary phosphonium compounds (QPCs) emerging as a new class of promising antimicrobials that boast significant activity against highly resistant bacteria. Reported here is a series of twenty-one novel QPCs that replace phenyl substituents on the phosphorus center with alkyl groups yet allow for rapid synthetic routes in high yields. Within this series are structures containing methyl, ethyl, or cyclohexyl phosphonium substituents on bisphosphane scaffolds bearing ethyl linkers, affording atom economical structures and ones that represent exact analogs to nitrogenous amphiphiles. The resultant bisQPC structures display high antibacterial efficacy enjoyed by comparably constructed QACs, with three structures in the single-digit micromolar activity range despite structural simplification.
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Affiliation(s)
- Laura M Thierer
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085, United States of America
| | - Ashley A Petersen
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085, United States of America
| | - Marina E Michaud
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States of America
| | - Christian A Sanchez
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States of America
| | - Samantha R Brayton
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085, United States of America
| | - William M Wuest
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States of America
| | - Kevin P C Minbiole
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085, United States of America
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Baraka MMAL, Cevidanes L, Tekeya M, Bakry N, Ruellas A, Botero T, Benavides E, Fontana M. Three-Dimensional Assessment of Radiographic Changes after Indirect Pulp Capping Using Silver Diamine Fluoride with or without Potassium Iodide in Young Permanent Teeth (12-Month RCT). Caries Res 2023; 57:177-188. [PMID: 36878216 DOI: 10.1159/000529893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 02/20/2023] [Indexed: 03/08/2023] Open
Abstract
The aim of this study was to conduct a three-dimensional (3D) evaluation of radiographic changes after indirect pulp capping (IPC) with silver diamine fluoride (SDF) with or without potassium iodide (KI) and resin-modified glass ionomer cement (RMGIC) in deep carious young permanent molars using cone-beam computed tomography (CBCT). 108 first permanent molars with deep occlusal cavitated caries lesions, in forty-nine 6- to 9-year-old children, were randomly allocated to one of 3 groups (n = 36) and treated with SDF+KI, SDF, and RMGIC as IPC materials. CBCT scans were taken at 0 and 12 months to assess tertiary dentin formation (volume and grey level intensity), increase in root length, and pathological changes such as secondary caries, periapical radiolucency, internal resorption, and obliteration of the pulp. The 3D image analysis procedures were performed using ITK-SNAP and 3D Slicer CMF. Comparisons were made using analysis of variance with a fixed effect for treatment and random effects for patient and patient-by-treatment to account for within-patient correlations. A two-sided 5% significance level was used. There were no significant differences among the three groups regarding tertiary dentin volume (p = 0.712) and grey level intensity (p = 0.660), increase in root length (p = 0.365), prevention of secondary caries (p = 0.63), and periapical radiolucency (p = 0.80) in the analysed 69 CBCT scans. The study did not find differences among the groups regarding quality and quantity of tertiary dentin formed, increase in root length, absence of secondary caries, and other signs of failure as shown by CBCT. Clinical Significance: The results show no significant differences in radiographic outcomes (quality and quantity of tertiary dentin formed, increase in root length, absence of secondary caries, and other signs of failure) when using SDF+KI, SDF, and RMGIC in IPC. The results of this study can help guide treatment decision-making regarding use of SDF and SDF+KI as IPC materials in deep cavitated lesions.
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Affiliation(s)
| | - Lucia Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Magda Tekeya
- Pediatric Dentistry Department, Alexandria University, Faculty of Dentistry, Alexandria, Egypt
| | - Niveen Bakry
- Pediatric Dentistry Department, Alexandria University, Faculty of Dentistry, Alexandria, Egypt
| | - Antonio Ruellas
- Department of Orthodontics, Federal University of Rio de Janeiro, Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tatiana Botero
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Erika Benavides
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Margherita Fontana
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
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Zhao M, Gao J, Zhang H, Cui Y, Wang Z, Zhao Y, Zhang Y, Liu Y. Quaternary ammonium compounds promoted anoxic sludge granulation and altered propagation risk of intracellular and extracellular antibiotic resistance genes. J Hazard Mater 2023; 445:130464. [PMID: 36444811 DOI: 10.1016/j.jhazmat.2022.130464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/14/2022] [Accepted: 11/22/2022] [Indexed: 06/16/2023]
Abstract
Surfactants could influence sludge morphology and disinfectants were linked to antibiotic resistance genes (ARGs). Thus, the response of activated sludge and ARGs to long-term quaternary ammonium compounds (QACs) exposure required further investigation, which is a popular surfactant and disinfectant. Here, three sequencing batch reactors were fed with 5 mg/L most frequently detected QACs (dodecyl trimethyl ammonium chloride (ATMAC C12), dodecyl benzyl dimethyl ammonium chloride (BAC C12) and didodecyl dimethyl ammonium chloride (DADMAC C12)) for 180 d. The long-term inhibitory effect on denitrification ranked: DADMAC C12 > BAC C12 > ATMAC C12. Besides, obvious granular sludge promoted by the increase of α-Helix/(β-Sheet + Random coil) appeared in DADMAC C12 system. Moreover, intracellular ARGs increased when denitrification systems encountered QACs acutely but decreased in systems chronically exposed to QACs. Although replication and repair metabolism in ATMAC C12 system was higher, ATMAC C12 significantly promoted proliferation of extracellular ARGs. It was noteworthy that the propagation risk of extracellular ARGs in sludge increased significantly during sludge granulation process, and intracellular sul2 genes in sludge and water both increased with the granular diameter in DADMAC C12 system. The universal utilization of QACs may enhance antibiotic resistance of bacteria in wastewater treatment plants, deserving more attention.
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Affiliation(s)
- Mingyan Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Jingfeng Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Haoran Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yingchao Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Zhiqi Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yifan Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yi Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Ying Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
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Copes WE, Ojiambo PS. A Systematic Review and Quantitative Synthesis of the Efficacy of Quaternary Ammonium Disinfestants Against Fungal Plant Pathogens. Plant Dis 2023; 107:480-492. [PMID: 35787003 DOI: 10.1094/pdis-09-21-2018-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Quaternary ammonium compounds (QACs) have been used as disinfestants in plant production systems since the late 20th century. In studies on the control of fungal pathogens in agricultural and horticultural crop production systems, the efficacy of QAC disinfestants is variable, ranging from very high to ineffective. A systematic review and meta-analysis were performed to establish and understand how pathogen- and application-related factors influenced product efficacy. The meta-analysis was based on 124 studies involving 14 fungal plant pathogen genera, eight target materials, and four generations of QAC products that contained different mixtures of active ingredients. A significant (P < 0.0001) reduction in either disease intensity or propagule viability resulted following disinfestation using QAC products. Hedges' g standardized mean difference (g̅+) across the studies was 2.16, indicating that QACs, on average, were highly effective against fungal pathogens. Heterogeneity was significant (P < 0.0001), indicating that effect sizes (g) were not representative of a common mean effect size and supported selection of a random effects model. In all, 78.5% of the observed variance consisted of variance in true effects with a high estimate of between-study variability (τ2 = 2.15). For fungal genus, subgroup g̅+ for genera Pseudonectria and Calonectria was significantly (P < 0.0038) higher than for all other genus subgroups, except Fusarium. For target materials, subgroup g̅+ for solution, cloth, plant, and metal were significantly (P > 0.0071) higher than for inorganic material or wood. For product generation, subgroup g̅+ for fifth-generation products was significantly (P > 0.0071) higher than for fourth-, third-, and second-generation products. Dose and time accounted for only 8 and 4%, respectively, of the true variance in effect sizes in the regression model dose, time, and dose-time (P = 0.0004). Genus accounted for 40 and 51% of the true variance in effect sizes in the regression models dose and genus (P = 0.0008) and time and genus (P = 0.0007), respectively. Target material accounted for 18 and 19% of the true variance in effect sizes in the regression models dose and target (P = 0.0001) and time and target (P = 0.0001), respectively. QAC product generation accounted for 24 and 21% of the true variance in effect sizes in the regression models dose and QAC generation (P = 0.0034) and time and QAC generation (P = 0.0189), respectively. These results show that the current recommended rates for dose and contact time are generally expected to result in effective disinfestation for commercial QAC products. However, the efficacy against fungal plant pathogens is likely to be influenced by the fungal genus and target being treated and the generation of the QAC product that is used for disinfestation.
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Affiliation(s)
- Warren E Copes
- United States Department of Agriculture-Agricultural Research Service, Poplarville, MS 39470
| | - Peter S Ojiambo
- Center for Integrated Fungal Research, Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695
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Dias FA, Vidal CMP, Comnick CL, Xie XJ, Berger SB. Effect of silver nanoparticles associated with fluoride on the progression of root dentin caries in vitro. PLoS One 2023; 18:e0277275. [PMID: 36662694 PMCID: PMC9858332 DOI: 10.1371/journal.pone.0277275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 10/24/2022] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES To assess the anti-proteolytic effect and potential to inhibit dentin root caries progression of a silver nanoparticle and fluoride solution (CNanoF) in comparison to silver diamine fluoride (SDF). METHODS 48 specimens of root dentin artificial caries lesion were treated with 38% SDF, CNanoF, CNano or F (n = 6 per group). Ph cycling with demineralization and remineralization solutions simulated caries lesion progression. In addition, specimens were incubated with or without bacterial collagenase in the remineralization solution to induce dentin proteolytic degradation. Dentin degradation was assessed by weight loss rate and hydroxyproline (Hyp) release. Changes in cross-sectional microhardness, and lesion permeability and collagen integrity as determined by confocal laser scanning microscopy indicated potential for further demineralization inhibition. The effect of the solutions on the activity of metalloproteinases (MMP) -2 and -9 was also investigated. Statistical analysis consisted of ANOVA, Kruskal-Wallis, and linear mixed models with post-hoc pairwise Tukey, Dunn, and t-tests (α = 0.05). RESULTS Treatment with SDF resulted in lower weight loss rate than did other solutions, but all groups showed similar Hyp release (p = 0.183). SDF resulted in greater microhardness at superficial layers of the caries lesions (p<0.05), while there were no differences among CNanoF, CNano, and F. Lesion permeability was similar among all groups after pH cycling (p>0.05), with or without the use of collagenase (p = 0.58). No statistically significant difference was noted among solutions regarding collagen integrity after pH cycling; however, SDF-treated dentin had a significant decrease in collagen integrity when collagenase was used (p = 0.003). Interestingly, only SDF was able to completely inactivate MMP-2 and -9. CONCLUSIONS CNanoF and SDF both potentially prevent dentin degradation during caries lesion progression in vitro; however, SDF was more effective at inhibiting further tissue demineralization.
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Affiliation(s)
- Flaviana Alves Dias
- Department of Restorative Dentistry, University of North Parana, Londrina, Paraná, Brazil
| | - Cristina M. P. Vidal
- Department of Operative Dentistry, College of Dentistry, The University of Iowa, Iowa City, Iowa, United States of America
| | - Carissa L. Comnick
- Division of Biostatistics and Computational Biology, College of Dentistry, The University of Iowa, Iowa City, Iowa, United States of America
| | - Xian Jin Xie
- Division of Biostatistics and Computational Biology, College of Dentistry, The University of Iowa, Iowa City, Iowa, United States of America
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Zhang X, Ma J, Guo Y, Luo Y, Li F, Wang Z. Induced mazEF-mediated programmed cell death contributes to antibiofouling properties of quaternary ammonium compounds modified membranes. Water Res 2022; 227:119319. [PMID: 36368087 DOI: 10.1016/j.watres.2022.119319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 10/29/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Functionalized antibiofouling membranes have attracted increasing attention in water and wastewater treatment. Among them, contact-killing antibiofouling membranes deliver a long-lasting effect with no leaching or release, thus providing distinctive advantages. However, the antibiofouling mechanism especially in the vicinity of the membrane surface remains unclear. Herein, we demonstrate that mazEF-mediated programmed cell death (PCD) is critical for the antibiofouling behaviors of quaternary ammonium compounds modified membranes (QM). The viability of wild type Escherichia coli (WT E. coli) upon exposure to QM for 1 h was decreased dramatically (31.5 ± 1.4% of the control). In contrast, the bacterial activity of E. coli with the knockout of mazEF gene (KO E. coli) largely remained (85.8 ± 5.2%). Through addition of quorum sensing factor, i.e., extracellular death factor (EDF), the antibacterial activity was significantly enhanced in a dilute culture, indicating that the density-dependent bacterial communication played an important role in the mazEF-mediated PCD system in biofouling control. Long-term study further showed that QM exhibited a better antibiofouling performance to treat feedwater containing WT E. coli, especially when EDF was dosed. Results of this study suggested that the bacteria on the membrane surface subject to contact killing could modulate the population growth in the vicinity via quorum-sensing mazEF-mediated PCD, paving a way to develop efficient antibiofouling materials based on contact-killing scenarios.
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Affiliation(s)
- Xingran Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Textile pollution controlling Engineering Centre of Ministry of Ecology and Environment, Donghua University, Shanghai 201620, China
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yu Guo
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yi Luo
- College of Environmental Science and Engineering, Textile pollution controlling Engineering Centre of Ministry of Ecology and Environment, Donghua University, Shanghai 201620, China
| | - Fang Li
- College of Environmental Science and Engineering, Textile pollution controlling Engineering Centre of Ministry of Ecology and Environment, Donghua University, Shanghai 201620, China
| | - Zhiwei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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Rozman U, Duh D, Cimerman M, Turk SŠ. Hygiene of Medical Devices and Minimum Inhibitory Concentrations for Alcohol-Based and QAC Disinfectants among Isolates from Physical Therapy Departments. Int J Environ Res Public Health 2022; 19:14690. [PMID: 36429408 PMCID: PMC9691081 DOI: 10.3390/ijerph192214690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Disinfectants are used intensively to control and prevent healthcare-associated infections. With continuous use and exposure to disinfectants, bacteria may develop reduced susceptibility. The study aimed to check the hygiene of devices in the physiotherapy department. For isolated bacterial strains, we aimed to determine the minimum inhibitory concentration of five different disinfectant wipe products currently in use. Microbiological environmental sampling in four various institutions in four different cities from two counties was performed, followed by CFU calculation and identification using matrix-assisted laser desorption and ionization with time-of-flight analyzer mass spectrometry (MALDI-TOF). The sampling was performed on three different occasions: before patient use, after patient use, and after disinfection. The susceptibility of isolates to three different alcohol-based and three different quaternary ammonium compounds (QAC) disinfectant wipes was examined by determining the minimal inhibitory concentrations (MIC). We identified 27 different bacterial species from 11 different genera. Gram-positive bacteria predominated. The most abundant genera were Staphylococcus, Micrococcus, and Bacillus. The average MIC values of alcohol-based disinfectants range between 66.61 and 148.82 g/L, and those of QAC-based disinfectants range between 2.4 and 3.5 mg/L. Distinctive strains with four-fold increases in MIC values, compared to average values, were identified. The widespread use of disinfectants can induce a reduction in the susceptibility of bacteria against disinfectants and affect the increase in the proportion of antibiotic-resistant bacteria. Therefore, it is urgent to define clear criteria for defining a microorganism as resistant to disinfectants by setting epidemiological cut-off (ECOFF) values and standardizing protocols for testing the resistance of microorganisms against disinfectants.
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Affiliation(s)
- Urška Rozman
- Faculty of Health Sciences, University of Maribor, Žitna ulica 15, 2000 Maribor, Slovenia
| | - Darja Duh
- Chemicals Office of the Republic of Slovenia, Ajdovščina 4, 1000 Ljubljana, Slovenia
| | - Mojca Cimerman
- National Laboratory of Health, Environment and Food, Prvomajska ulica 1, 2000 Maribor, Slovenia
| | - Sonja Šostar Turk
- Faculty of Health Sciences, University of Maribor, Žitna ulica 15, 2000 Maribor, Slovenia
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Zhang P, Zhu S, Xiong C, Yan B, Wang Z, Li K, Olivier I, Wang H. Flocculation of Chlorella vulgaris-induced algal blooms: critical conditions and mechanisms. Environ Sci Pollut Res Int 2022; 29:78809-78820. [PMID: 35699884 DOI: 10.1007/s11356-022-21383-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Algal blooms have posed great threats to livestocks and human health. Although flocculation is effective, its efficiency may hinder the direct application for algal blooms. In this study, critical (optimal) conditions and mechanisms for AlCl3, FeCl3, poly-aluminum chloride (PAC), chitosan, and polydimethyldiallylammonium chloride (PDADMAC)-induced flocculation of Chlorella vulgaris (C. vulgaris) were studied. Results identified the critical conditions which can cause flocculation efficiencies over 90% in 45 min for the five flocculants. Specifically, 4~10-mg/L doses of PDADMAC were proved to be appropriate for the treatment of C. vulgaris-induced algal blooms at pH 6.0~12.0. To probe the underlying mechanisms, functional groups involved in flocculation, zeta potential, and species distribution were analyzed during flocculation. FT-IR results indicated that N-H stretching in amine and C-H deformation in aliphatics were involved in algal flocculation with FeCl3, and C-H deformation played an important role with PDADMAC, PAC, and chitosan. For AlCl3, zeta potential and species distribution results suggested that charge neutralization and adsorption bridging were responsible for algal flocculation at pH 6~8. However, adsorption bridging and sweeping effects were the main mechanisms at pH >3 for FeCl3. The flocculation mechanisms for the rest of the three polymers were charge neutralization, adsorption bridging, and sweeping. Meanwhile, all the flocculation processes followed second-order kinetics. Strong linkages were found between the rate constant, fractal dimension, and flocculation efficiency (P < 0.05). The results of critical flocculation conditions and mechanisms indicated that PDADMAC was an excellent flocculant for C. vulgaris removing and recycling, especially in water bloom treatment.
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Affiliation(s)
- Ping Zhang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Sihan Zhu
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Chao Xiong
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Bin Yan
- College of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404020, China
| | - Zhikang Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China.
| | - Kai Li
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Irumva Olivier
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
- University of Rwanda, College of Science and Technology, P.O. Box 3900, Kigali, Rwanda
| | - Han Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
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Chen Q, Zhao K, Li G, Luo J, Li X, Zeng Y, Wang XM. Highly Permeable Polylactic Acid Membrane Grafted with Quaternary Ammonium Salt for Effective and Durable Water Disinfection. ACS Appl Mater Interfaces 2022; 14:43741-43748. [PMID: 36099237 DOI: 10.1021/acsami.2c11551] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Given the increasing usage of drinking water purifiers, highly permeable membranes with strong antimicrobial functions are desperately desirable for effective and durable water disinfection. Hereby, we prepared such antimicrobial membranes by chemical grafting of quaternary ammonium salt (QAS) molecules, 3-(trimethoxysilyl)propyldimethyloctadecyl ammonium chloride (TPMMC), onto air plasma pretreated biodegradable polylactic acid (PLA) substrates. The high chemical grafting density promoted very strong and positive zeta potential charge of the resulted PLA-QAS membrane, contributing to effective and broad-spectrum antimicrobial efficiencies (>99.99%) against different microbes, including fungi and conventional and drug-resistant bacteria. The solid grafting of QAS molecules produced a durable antimicrobial performance of the PLA-QAS membrane. In addition, the pleated filter (0.45 m2) of PLA-QAS membrane showed outstanding bacteria rejection properties (>99.99%) and excellent washing durability (up to 20 m3 water) even at very high water filtration rates (up to 4 L/min). The disinfection mechanism was clarified that negatively charged bacteria could be rapidly adsorbed to positively charged PLA-QAS spinnings, followed by devastating cell membrane damage to bacterial debris, leaving a clean environment without significant biofilm and biofouling formation.
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Affiliation(s)
- Qingyan Chen
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Kai Zhao
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Guoping Li
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Jiyue Luo
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Xin Li
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Yingjie Zeng
- Shenzhen Angel Drinking Water Industrial Group Corporation, Angel Industrial Park, Baoan District, Shenzhen, Guangdong 518108, China
| | - Xiao-Mao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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Zhou Y, Jiang Y, Zhang Y, Tan L. Improvement of Antibacterial and Antifouling Properties of a Cellulose Acetate Membrane by Surface Grafting Quaternary Ammonium Salt. ACS Appl Mater Interfaces 2022; 14:38358-38369. [PMID: 35950600 DOI: 10.1021/acsami.2c09963] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Through etherification reaction, epoxy propyl dimethyl dodecyl ammonium chloride (EPDMDAC) was grafted onto the surface of a cellulose acetate (CA) membrane to prepare a stable nonleaching antibacterial antifouling membrane (QCA-X). The results showed that with the extension of grafting reaction time, the quaternary ammonium salt groups on the membrane surface increased and the hydrophilicity was enhanced. Compared with those of the CA membrane, the filtration capacity and antifouling performance of the QCA-X membrane are improved. When the grafting time is 4 h, the water permeability and flux recovery rate of the QCA-4 membrane are increased by 139 and 21.5%, respectively. The QCA-X membrane showed excellent antibacterial performance, and the sterilization rate against S. aureus and E. coli was more than 99.99%. After four repeated antibacterial cycles, the bactericidal rates against S. aureus and E. coli were maintained at about 99.69 ± 0.02 and 99.98 ± 0.02%, respectively, with good antibacterial persistence. Moreover, the QCA-X membrane can effectively inhibit bacterial adhesion. Mild and simple EPDMDAC grafting modifications improve the antibacterial, antifouling, and antibioadhesion properties of the CA membrane, showing its application potential in long-term water treatment, especially in biofouling water treatment.
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Affiliation(s)
- Yuan Zhou
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- Research Center for Fiber Science and Engineering Technology, Yibin Institute of Industrial Technology/Sichuan University, Yibin Park, Yibin 64460, China
| | - Yuanzhang Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- Research Center for Fiber Science and Engineering Technology, Yibin Institute of Industrial Technology/Sichuan University, Yibin Park, Yibin 64460, China
| | - Yong Zhang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- Research Center for Fiber Science and Engineering Technology, Yibin Institute of Industrial Technology/Sichuan University, Yibin Park, Yibin 64460, China
| | - Lin Tan
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- Research Center for Fiber Science and Engineering Technology, Yibin Institute of Industrial Technology/Sichuan University, Yibin Park, Yibin 64460, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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Hollenhorst MI, Kumar P, Zimmer M, Salah A, Maxeiner S, Elhawy MI, Evers SB, Flockerzi V, Gudermann T, Chubanov V, Boehm U, Krasteva-Christ G. Taste Receptor Activation in Tracheal Brush Cells by Denatonium Modulates ENaC Channels via Ca2+, cAMP and ACh. Cells 2022; 11:cells11152411. [PMID: 35954259 PMCID: PMC9367940 DOI: 10.3390/cells11152411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/23/2022] [Accepted: 08/03/2022] [Indexed: 02/04/2023] Open
Abstract
Mucociliary clearance is a primary defence mechanism of the airways consisting of two components, ciliary beating and transepithelial ion transport (ISC). Specialised chemosensory cholinergic epithelial cells, named brush cells (BC), are involved in regulating various physiological and immunological processes. However, it remains unclear if BC influence ISC. In murine tracheae, denatonium, a taste receptor agonist, reduced basal ISC in a concentration-dependent manner (EC50 397 µM). The inhibition of bitter taste signalling components with gallein (Gβγ subunits), U73122 (phospholipase C), 2-APB (IP3-receptors) or with TPPO (Trpm5, transient receptor potential-melastatin 5 channel) reduced the denatonium effect. Supportively, the ISC was also diminished in Trpm5−/− mice. Mecamylamine (nicotinic acetylcholine receptor, nAChR, inhibitor) and amiloride (epithelial sodium channel, ENaC, antagonist) decreased the denatonium effect. Additionally, the inhibition of Gα subunits (pertussis toxin) reduced the denatonium effect, while an inhibition of phosphodiesterase (IBMX) increased and of adenylate cyclase (forskolin) reversed the denatonium effect. The cystic fibrosis transmembrane conductance regulator (CFTR) inhibitor CFTRinh172 and the KCNQ1 potassium channel antagonist chromanol 293B both reduced the denatonium effect. Thus, denatonium reduces ISC via the canonical bitter taste signalling cascade leading to the Trpm5-dependent nAChR-mediated inhibition of ENaC as well as Gα signalling leading to a reduction in cAMP-dependent ISC. Therefore, BC activation contributes to the regulation of fluid homeostasis.
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Affiliation(s)
| | - Praveen Kumar
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | - Maxim Zimmer
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | - Alaa Salah
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | - Stephan Maxeiner
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | | | - Saskia B. Evers
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | - Veit Flockerzi
- Institute for Experimental and Clinical Pharmacology and Toxicology, Centre for Molecular Signalling, Saarland University, 66421 Homburg, Germany
| | - Thomas Gudermann
- Walter-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University and German Centre for Lung Research (DZL), 80366 Munich, Germany
| | - Vladimir Chubanov
- Walter-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University and German Centre for Lung Research (DZL), 80366 Munich, Germany
| | - Ulrich Boehm
- Experimental Pharmacology, Centre for Molecular Signalling, School of Medicine, Saarland University, 66421 Homburg, Germany
| | - Gabriela Krasteva-Christ
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
- Correspondence: ; Tel.: +49-6841-16-26101
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Jia Y, Lu H, Zhu L. Molecular mechanism of antibiotic resistance induced by mono- and twin-chained quaternary ammonium compounds. Sci Total Environ 2022; 832:155090. [PMID: 35398118 PMCID: PMC8985400 DOI: 10.1016/j.scitotenv.2022.155090] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/17/2022] [Accepted: 04/03/2022] [Indexed: 05/08/2023]
Abstract
The usage of quaternary ammonium compounds (QACs) as disinfectants has increased dramatically since the outbreak of COVID-19 pandemic, leading to potentially accelerated emergence of antibiotic resistance. Long-term exposure to subinhibitory level QACs can lead to multidrug resistance, but the contribution of mutagenesis to resistance evolution is obscure. In this study, we subcultured E. coli K-12 under subinhibitory (0.25 × and 0.5 × Minimum Inhibitory Concentration, MIC) or inhibitory (1 × and 2 × MIC) concentrations of benzalkonium chloride (BAC, mono-chained) or didecyldimethylammonium chloride (DDAC, twin-chained) for 60 days. The sensitivity of QAC-adapted cells to five typical antibiotics decreased significantly, and in particular, the MIC of rifampicin increased by 85 times. E. coli adapted faster to BAC but developed 20-167% higher antibiotic resistance with 56% more mutations under DDAC exposure. The broader mutations induced by QACs, including negative regulators (acrR, marR, soxR, and crp), outer membrane proteins and transporters (mipA and sbmA), and RNA polymerase (rpoB and rpoC), potentially contributed to the high multi-drug resistance. After QACs stresses were removed, the phenotypic resistance induced by subinhibitory concentrations of QACs was reversible, whereas that induced by inhibitory concentrations of QACs was irreversible. The different patterns and molecular mechanism of antibiotic resistance induced by BAC and DDAC is informative to estimating the risks of broader QACs present at varied concentrations in the environment.
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Affiliation(s)
- Yin Jia
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Huijie Lu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lizhong Zhu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
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Fan W, Zhang Y, Li Y, Zhang W, Huang D. Solvent-Free Strategy for Direct Access to Versatile Quaternary Ammonium Salts with Complete Atom Economy. ChemSusChem 2022; 15:e202200529. [PMID: 35466550 DOI: 10.1002/cssc.202200529] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 04/22/2022] [Indexed: 06/14/2023]
Abstract
A solvent-free method for the synthesis of quaternary ammonium salts (QAS) by iodoquaternization of alkenes with N-heteroarenes was reported. Its advantages lie in energy-saving and clean production by using iodine as the oxidant and manual grinding the starting materials, together with the complete atom economy and low process mass intensity (PMI) value. Demonstrated by 50 examples, the generated QAS was proved to be able to produce valuable chemicals, such as biological protease inhibitors, anti-cancer agents, and organic fluorescent materials.
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Affiliation(s)
- Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yuan Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Yinghua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Wei Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Deguang Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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Yao S, Qin L, Wang Z, Zhu L, Zhou C, Wu J. Novel nanoparticle-modified multifunctional microcapsules with self-healing and antibacterial activities for dental applications. Dent Mater 2022; 38:1301-1315. [PMID: 35718598 DOI: 10.1016/j.dental.2022.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/03/2022] [Accepted: 06/05/2022] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Although microcapsules (MCs) have been used for dental resins to achieve self-healing capabilities, the fragile organic shell and single healing event functions during the service period limit their use. Herein, a novel nanoparticle-modified MC with a nano-antibacterial inorganic filler (NIF) containing a quaternary ammonium salt was synthesized to address these issues. METHODS MCs with 0 %-30 % NIFs were prepared via an in situ polymerization method and characterized their morphology, chemical composition, thermal stability, roughness, mechanical properties, and antibacterial effect. Subsequently, M-10 MCs were mixed into the resin matrix at a mass fraction of 7.5 %. The self-healing capability and cytotoxicity were evaluated. RESULTS The introduction of nanomaterials enhances the shell of the MCs and endows them with an antibacterial effect. With the addition of NIFs, the roughness, modulus, and hardness values of MCs all increased (p < 0.05). The presence of M-10 MCs reduced the CFU by 2-3 orders of magnitude compared to the control group. The dental resin containing 7.5 % M-10 MCs obtained almost 69 % self-healing efficiency, without significantly compromising cell viability (p < 0.05). SIGNIFICANCE Self-healing MCs with NIFs were prepared for the first time with strong antibacterial properties, a substantial self-healing capability, and low toxicity. This multifunctional MC is a promising candidate for use in dental resins to extend the service life and resolve the problem of bulk fracture and secondary caries.
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Affiliation(s)
- Shuo Yao
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, 250012, China
| | - Ludan Qin
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, 250012, China
| | - Zonghua Wang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, 250012, China
| | - Lin Zhu
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan, 250061, China
| | - Chuanjian Zhou
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan, 250061, China
| | - Junling Wu
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, 250012, China.
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Li D, Gao J, Dai H, Wang Z, Cui Y, Zhao Y, Zhou Z. Fates of quaternary ammonium compound resistance genes and the corresponding resistant strain in partial nitrification/anammox system under pressure of hexadecyl trimethyl ammonium chloride. Water Res 2022; 217:118395. [PMID: 35429877 DOI: 10.1016/j.watres.2022.118395] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 02/19/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
Hexadecyl trimethyl ammonium chloride (ATMAC-C16) is a kind of quaternary ammonium compound (QACs) which is extensively consumed as disinfectants, antimicrobials and surfactants. Here, the partial nitrification/anammox (PN/A) system was exposed to different levels of ATMAC-C16 (0-10 mg/L) and the main objective was to reveal the long-term microbiological responses of PN/A system to ATMAC-C16, importantly, explore the tolerance of PN/A to ATMAC-C16 and the key resistant strain. Nitrogen removal efficiency was influenced by environmental and extreme levels of ATMAC-C16 through mainly affecting the anammox (hzsB) gene. Two types of anammox, Candidatus Jettenia and Candidatus Kuenenia, were enriched under the pressure of ATMAC-C16, which allowed PN/A system to maintain good nitrogen removal performance. ATMAC-C16 might cause the hormesis of entire microbial population in PN/A system, leading to the enhancement of cell viability. ATMAC-C16 decreased the relative abundances of most antibiotics resistance genes (ARGs) but significantly enriched QACs resistance genes (QRGs). The tolerance of PN/A system to ATMAC-C16 might be strengthened by inducing the efflux pumps encoding genes (qacH-01/02). Microbial hosts dynamic and co-selection mechanism among ARGs and QRGs resulted in the opposite trends of qacEdeltal-01/02 and qacH-01/02. Pseudoxanthomonas mexicana was identified as the ATMAC-C16 resistant strain, and its resistance to 10 mg/L ATMAC-C16 might not only obtain by capturing the qacH gene, but also benefit from its own efflux pump system. Therefore, from the perspective of the transmission of resistance genes, especially for QRGs, the spread risk of QRGs and ATMAC-C16 resistant strain in PN/A technique should be taken seriously.
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Affiliation(s)
- Dingchang Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Jingfeng Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Huihui Dai
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Zhiqi Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yingchao Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yifan Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Zhixiang Zhou
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
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Tu ATT, Hoshi K, Shobo M, Yamazaki T. G-quadruplex-based CpG oligodeoxynucleotide/DOTAP complex strongly stimulates immunity in CpG motif-specific and loop-length-dependent manners. Nanomedicine 2022; 40:102508. [PMID: 34906721 DOI: 10.1016/j.nano.2021.102508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/11/2021] [Accepted: 11/19/2021] [Indexed: 06/14/2023]
Abstract
Guanine-quadruplex (G4) oligodeoxynucleotides (ODNs) that contain unmethylated cytosine-phosphate-guanine motifs (G4 CpG ODN) with phosphodiester backbones are safer than the phosphorothioate (PT)-modified CpG ODNs recently used as vaccine adjuvants. However, cellular uptake and the nuclease stability of G4 CpG ODNs are still insufficient, resulting in lower immunostimulatory activity than PT-modified CpG ODNs. We aimed to enhance the immunostimulatory properties of G4 CpG ODNs by complexing with the cationic liposome 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP). The complex acquired nuclease resistance and improved cellular uptake. The immunostimulatory activity of the G4 CpG ODN-DOTAP lipoplexes was enhanced to a level comparable to that of PT-modified ODNs. In addition, the lipoplexes based on unmodified G4 CpG ODNs demonstrated CpG motif-specific immunostimulant activity, although PT-modified ODNs lacking the CpG motif could activate human immune cells. Interestingly, G4 CpG ODN-DOTAP lipoplexes induced interferon-α production in a loop-length dependent manner.
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Affiliation(s)
- Anh Thi Tram Tu
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan; Division of Life Science, Hokkaido university, Sapporo, Japan
| | - Kazuaki Hoshi
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Miwako Shobo
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Tomohiko Yamazaki
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan; Division of Life Science, Hokkaido university, Sapporo, Japan.
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Cui J, Ji X, Mi Y, Miao Q, Dong F, Tan W, Guo Z. Antimicrobial and Antioxidant Activities of N-2-Hydroxypropyltrimethyl Ammonium Chitosan Derivatives Bearing Amino Acid Schiff Bases. Mar Drugs 2022; 20:md20020086. [PMID: 35200616 PMCID: PMC8877835 DOI: 10.3390/md20020086] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/13/2022] [Accepted: 01/14/2022] [Indexed: 11/26/2022] Open
Abstract
N-2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC), a cationic quaternary ammonium salt polymer exhibiting good solubility in water, is widely used because of its low toxicity and good biocompatibility. Herein, through ion exchange reaction, we prepared N-2-hydroxypropyltrimethyl ammonium chitosan derivatives bearing amino acid Schiff bases with good biological activities. The accuracy of the structures was verified by FT-IR and 1H NMR. The antibacterial activity, antifungal activity, and scavenging ability of DPPH radical and superoxide radical of HACC derivatives were significantly improved compared with that of HACC. In particular, HACGM (HACC-potassium 2-((2-hydroxy-3-methoxybenzylidene)amino)acetate) and HACGB (HACC-potassium 2-((5-bromo-2-hydroxybenzylidene)amino)acetate) showed good inhibitory effect on bacteria and fungi, including Staphylococcus aureus, Escherichia coli, Botrytis cinerea, and Fusarium oxysporum f. sp. cubense. The inhibition rate of HACGB on Staphylococcus aureus and Escherichia coli could reach 100% at the concentration of 0.1 mg/mL, and the inhibition rate of HACGM and HACGB on Botrytis cinerea and Fusarium oxysporum f. sp. cubense could also reach 100% at the concentration of 0.5 mg/mL. Improving antimicrobial and antioxidant activities of HACC could provide ideas and experiences for the development and utilization of chitosan derivatives.
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Affiliation(s)
- Jingmin Cui
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Xia Ji
- School of Pharmacy, Qilu Medical University, Zibo 255300, China
- Correspondence: (X.J.); (Z.G.)
| | - Yingqi Mi
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Qin Miao
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Fang Dong
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Wenqiang Tan
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zhanyong Guo
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (J.C.); (Y.M.); (Q.M.); (F.D.); (W.T.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
- Correspondence: (X.J.); (Z.G.)
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Yan B, Bao X, Liao X, Wang P, Zhou M, Yu Y, Yuan J, Cui L, Wang Q. Sensitive Micro-Breathing Sensing and Highly-Effective Photothermal Antibacterial Cinnamomum camphora Bark Micro-Structural Cotton Fabric via Electrostatic Self-Assembly of MXene/HACC. ACS Appl Mater Interfaces 2022; 14:2132-2145. [PMID: 34939796 DOI: 10.1021/acsami.1c22740] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Natural fabrics are gradually becoming the ideal substrate for flexible smart wearable devices due to their excellent moisture absorption, softness, and skin-friendliness. However, the bonding fastness of the conductive layer and the corresponding durability during service have not yet been well satisfied. In this report, we successfully prepared a smart wearable multifunctional protective cotton fabric with microbreathing monitoring and rapid-photothermal antibacterial abilities of Cinnamomum camphora bark microstructure, by combining chitosan quaternary ammonium salt (HACC) with MXene nanosheets through electrostatic self-assembly. Impressively, MXene nanosheets and HACC established a strong interaction using the electrostatic attraction, endowing the fiber surface with ordered nanosheets. Meanwhile, the fabric decorated with MXene/HACC retains its original characteristics of outstanding breathability and softness, and its conductivity exhibits noticeable stability in terms of resistances to oxidation, washing, various solvents, and long-term bending cycles. On the basis of the principle of adsorption and release of water molecules in the MXene multilayer structures, the MXene/HACC fabric could accurately monitor the physiological health activities of users according to their breathing frequency and depth. Benefiting from the local surface plasmon resonance (LSPR) effect, the MXene/HACC shows encouraging photothermal conversion ability, photothermal stability under long time irradiation, washing resistance, and cycle stability. In addition, the fabric achieved an antibacterial efficiency of nearly 100% against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus within 5 min under an irradiation intensity of 400 mW/cm2. More importantly, after 10 washes, the antibacterial efficiency against the two bacteria could still reach 99.975% and 99.98%, respectively. This multifunctional protective MXene/HACC cotton fabric is expected to play a unique role in the new generation of smart wearable microbreathing sensing and against to bacterial attack, and shows a broad application prospect.
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Affiliation(s)
- Biaobiao Yan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Xueming Bao
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Xiaoting Liao
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Man Zhou
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Jiugang Yuan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Li Cui
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, People's Republic of China
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