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Hu Z, Wu K, Lin J, Tan X, Jiang X, Xiao Y, Xiang L, Yang S, Zhang M, Xu W, Chen P. Synergistic antibacterial attributes of copper-doped polydopamine nanoparticles: an insight into photothermal enhanced antibacterial efficacy. NANOTECHNOLOGY 2024; 35:155102. [PMID: 38157559 DOI: 10.1088/1361-6528/ad19ad] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Antibiotic-resistant bacteria and associated infectious diseases pose a grave threat to human health. The antibacterial activity of metal nanoparticles has been extensively utilized in several biomedical applications, showing that they can effectively inhibit the growth of various bacteria. In this research, copper-doped polydopamine nanoparticles (Cu@PDA NPs) were synthesized through an economical process employing deionized water and ethanol as a solvent. By harnessing the high photothermal conversion efficiency of polydopamine nanoparticles (PDA NPs) and the inherent antibacterial attributes of copper ions, we engineered nanoparticles with enhanced antibacterial characteristics. Cu@PDA NPs exhibited a rougher surface and a higher zeta potential in comparison to PDA NPs, and both demonstrated remarkable photothermal conversion efficiency. Comprehensive antibacterial evaluations substantiated the superior efficacy of Cu@PDA NPs attributable to their copper content. These readily prepared nano-antibacterial materials exhibit substantial potential in infection prevention and treatment, owing to their synergistic combination of photothermal and spectral antibacterial features.
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Affiliation(s)
- Zhiqiong Hu
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Kexian Wu
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Jiahong Lin
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Xiaoqian Tan
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Xinyuan Jiang
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Yuhang Xiao
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Lanxin Xiang
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Shuang Yang
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Maolan Zhang
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Wenfeng Xu
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
| | - Peixing Chen
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, People's Republic of China
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Bak S, Shin J, Jeong J. Subdividing Stress Groups into Eustress and Distress Groups Using Laterality Index Calculated from Brain Hemodynamic Response. BIOSENSORS 2022; 12:bios12010033. [PMID: 35049661 PMCID: PMC8773747 DOI: 10.3390/bios12010033] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/07/2022] [Accepted: 01/07/2022] [Indexed: 12/28/2022]
Abstract
A stress group should be subdivided into eustress (low-stress) and distress (high-stress) groups to better evaluate personal cognitive abilities and mental/physical health. However, it is challenging because of the inconsistent pattern in brain activation. We aimed to ascertain the necessity of subdividing the stress groups. The stress group was screened by salivary alpha-amylase (sAA) and then, the brain’s hemodynamic reactions were measured by functional near-infrared spectroscopy (fNIRS) based on the near-infrared biosensor. We compared the two stress subgroups categorized by sAA using a newly designed emotional stimulus-response paradigm with an international affective picture system (IAPS) to enhance hemodynamic signals induced by the target effect. We calculated the laterality index for stress (LIS) from the measured signals to identify the dominantly activated cortex in both the subgroups. Both the stress groups exhibited brain activity in the right frontal cortex. Specifically, the eustress group exhibited the largest brain activity, whereas the distress group exhibited recessive brain activity, regardless of positive or negative stimuli. LIS values were larger in the order of the eustress, control, and distress groups; this indicates that the stress group can be divided into eustress and distress groups. We built a foundation for subdividing stress groups into eustress and distress groups using fNIRS.
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Affiliation(s)
- SuJin Bak
- Department of Brain and Cognitive Engineering, Korea University, Seoul 02841, Korea;
| | - Jaeyoung Shin
- Department of Electronic Engineering, Wonkwang University, Iksan 54538, Korea;
| | - Jichai Jeong
- Department of Brain and Cognitive Engineering, Korea University, Seoul 02841, Korea;
- Correspondence:
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