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Gao Y, Wu J, Shen J, Xu Y, Li L, Wang W, Zhou N, Zhang M. Chitosan modified magnetic nanocomposite for biofilm destruction and precise photothermal/photodynamic therapy. Int J Biol Macromol 2024; 259:129402. [PMID: 38219940 DOI: 10.1016/j.ijbiomac.2024.129402] [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: 07/23/2023] [Revised: 12/28/2023] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
Getting rid of the biofilms is a major challenge when treating skin and soft tissue infections (SSTI), an inflammatory illness brought on by bacteria. Traditional magnetic materials have a limited dispersibility and a biofilm permeable property, making it challenging to remove biofilms and causing infection to linger. To solve these problems, we developed a kind of magnetic composite nanoplatform coated with indocyanine green carbon dots and modified with chitosan modification (Fe-ICGCDs@CS). Fe-ICGCDs@CS has high dispersibility and improves the conductivity of biofilms under magnetic action. Fe-ICGCDs@CS can adsorb bacteria via the positive charge and achieve precise photothermal sterilization and photodynamic therapy (PDT). Moreover, by catalyzing hydrogen peroxide (2 mM), Fe-ICGCDs@CS can produce oxygen to relieve the anoxic state in the deep layer of biofilms and activate dormant bacteria to make them sensitive to external stimuli. All in all, unlike the common "just kill" sterilization model, Fe-ICGCDs@CS can accurately kill bacteria and be recovered by an external magnetic field at the end of treatment, thus reducing the potential biological toxicity of nanomaterials. Therefore, the proposed Fe-ICGCDs@CS provides a new antibacterial method with low biotoxicity for clinical application in the treatment of biofilm infections.
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Affiliation(s)
- Yumeng Gao
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, PR China; Jiangsu Collaborative Innovation Center for Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Jing Wu
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, PR China; Jiangsu Collaborative Innovation Center for Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Jian Shen
- Jiangsu Collaborative Innovation Center for Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Yan Xu
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, PR China
| | - Lu Li
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, PR China
| | - Wentao Wang
- College of Science, Nanjing Forestry University, Nanjing 210037, PR China
| | - Ninglin Zhou
- Jiangsu Collaborative Innovation Center for Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Ming Zhang
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, PR China.
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Chen Y, Lu Y, Xu J, Feng Y, Li X. Antibiotics and their associations with antibiotic resistance genes and microbial communities in estuarine and coastal sediment of Quanzhou Bay, Southeast China. Mar Pollut Bull 2023; 195:115539. [PMID: 37714074 DOI: 10.1016/j.marpolbul.2023.115539] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 09/03/2023] [Accepted: 09/10/2023] [Indexed: 09/17/2023]
Abstract
The antibiotic concentrations spanned from 11.2 to 173.8 ng/g, with quinolones and tetracyclines being observed to be prevalent. The amount of microbial biomass as determined by Phospholipid fatty acid (PLFA) ranged from 2.92 to 10.99 mg kg-1, with G- bacteria dominating. A total of 254 distinct ARGs and 10 MEGs were identified, with multidrug ARGs having the highest relative abundance (1.18 × 10-2 to 3.00 × 10-1 copies/16S rRNA gene copies), while vancomycin and sulfonamide resistance genes were the least abundant. Results from canonical-correlation analyses combined with redundancy analysis indicated that macrolides were significantly related to the shifts of microbial community structure in sediments, particularly in G+ bacteria that were more sensitive to antibiotic residues. It was observed that sulfonamide ARGs had a greater correlation with residual antibiotics than other ARGs. This study provided a field evidence that multiple residual antibiotics from coastal sites could cause fundamental shifts in microbial community and their associated ARGs.
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Affiliation(s)
- Yongshan Chen
- Key Laboratory of Rural Environmental Remediation and Waste Recycling (Quanzhou Normal University), Fujian Province University, 362000, Quanzhou 362000, PR China; School of Resource and Environmental Science, Quanzhou Normal University, Quanzhou 362000, PR China.
| | - Yue Lu
- School of Resource and Environmental Science, Quanzhou Normal University, Quanzhou 362000, PR China
| | - Jinghua Xu
- Key Laboratory of Rural Environmental Remediation and Waste Recycling (Quanzhou Normal University), Fujian Province University, 362000, Quanzhou 362000, PR China; School of Resource and Environmental Science, Quanzhou Normal University, Quanzhou 362000, PR China
| | - Ying Feng
- Key Laboratory of Rural Environmental Remediation and Waste Recycling (Quanzhou Normal University), Fujian Province University, 362000, Quanzhou 362000, PR China; School of Resource and Environmental Science, Quanzhou Normal University, Quanzhou 362000, PR China
| | - Xiaofeng Li
- School of Resource and Environmental Science, Quanzhou Normal University, Quanzhou 362000, PR China
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Abdel-Latif HMR, Yilmaz S, Kucharczyk D. Editorial: Functionality and applications of phytochemicals in aquaculture nutrition. Front Vet Sci 2023; 10:1218542. [PMID: 37303733 PMCID: PMC10250716 DOI: 10.3389/fvets.2023.1218542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Affiliation(s)
- Hany M. R. Abdel-Latif
- Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Sevdan Yilmaz
- Department of Aquaculture, Faculty of Marine Sciences and Technology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Dariusz Kucharczyk
- Department of Ichthyology and Aquaculture, University of Warmia and Mazury, Olsztyn, Poland
- Department of Research and Development, Chemprof, Olsztyn, Poland
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