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Mathur P, Kumawat M, Nagar R, Singh R, Daima HK. Tailoring metal oxide nanozymes for biomedical applications: trends, limitations, and perceptions. Anal Bioanal Chem 2024; 416:5965-5984. [PMID: 39009769 DOI: 10.1007/s00216-024-05416-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/17/2024]
Abstract
Nanomaterials with enzyme-like properties are known as 'nanozymes'. Nanozymes are preferred over natural enzymes due to their nanoscale characteristics and ease of tailoring of their physicochemical properties such as size, structure, composition, surface chemistry, crystal planes, oxygen vacancy, and surface valence state. Interestingly, nanozymes can be precisely controlled to improve their catalytic ability, stability, and specificity which is unattainable by natural enzymes. Therefore, tailor-made nanozymes are being favored over natural enzymes for a range of potential applications and better prospects. In this context, metal oxide nanoparticles with nanozyme-mimicking characteristics are exclusively being used in biomedical sectors and opening new avenues for future nanomedicine. Realising the importance of this emerging area, here, we discuss the mechanistic actions of metal oxide nanozymes along with their key characteristics which affect their enzymatic actions. Further, in this critical review, the recent progress towards the development of point-of-care (POC) diagnostic devices, cancer therapy, drug delivery, advanced antimicrobials/antibiofilm, dental caries, neurodegenerative diseases, and wound healing potential of metal oxide nanozymes is deliberated. The advantages of employing metal oxide nanozymes, their potential limitations in terms of nanotoxicity, and possible prospects for biomedical applications are also discussed with future recommendations.
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Affiliation(s)
- Parikshana Mathur
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindari, Kishangarh 305817, Ajmer, Rajasthan, India
| | - Mamta Kumawat
- Department of Biotechnology, JECRC University, Sitapura Extension, Jaipur, 303905, Rajasthan, India
| | - Rashi Nagar
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindari, Kishangarh 305817, Ajmer, Rajasthan, India
| | - Ragini Singh
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram, 522302, Andhra Pradesh, India.
| | - Hemant Kumar Daima
- Nanomedicine and Nanotoxicity Research Laboratory, Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindari, Kishangarh 305817, Ajmer, Rajasthan, India.
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Hu J, Chi M, He R, Fan J, Gao H, Xie W, Dai K, Sun S, Hu S. Multi-responsive Pickering emulsifiers: a comprehensive study on the emulsification-demulsification behavior of modified chitosan-coated Fe 3O 4 nanocomposites. Phys Chem Chem Phys 2024; 26:20009-20021. [PMID: 39005229 DOI: 10.1039/d4cp01018c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
The surface characteristics of stimuli-responsive Pickering emulsifiers can be modified by external environmental triggers, making them highly versatile in various applications. In this study, we report three novel organic-inorganic composite structure emulsifiers. These emulsifiers were designed with a core of magnetic Fe3O4 particles, surrounded by a protective silica layer, and coated on the exterior with three distinct types of modified chitosan (CS). Experimental results demonstrate that these emulsifiers can stabilize emulsion systems consisting of liquid paraffin and deionized water at a concentration of 0.5 wt%. The unique properties of the modified CS coatings allowed for the controlled demulsification of two types of emulsions by adjusting the proton concentration. Additionally, these emulsifiers exhibited magnetic-responsive demulsification under the control of an external magnetic field. The findings of this study provide valuable insights into the design and construction of multi-responsive chitosan-based magnetic Pickering emulsifiers with controllable properties.
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Affiliation(s)
- Jianwen Hu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Mingshuo Chi
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Runna He
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Junjie Fan
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Haotian Gao
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Wenqing Xie
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Kunxiu Dai
- School of Petroleum Engineering, Southwest Petroleum University, Chengdu, 610500, P. R. China
| | - Shuangqing Sun
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Songqing Hu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao, 266580, P. R. China
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Rajangam SL, Narasimhan MK. Current treatment strategies for targeting virulence factors and biofilm formation in Acinetobacter baumannii. Future Microbiol 2024; 19:941-961. [PMID: 38683166 PMCID: PMC11290764 DOI: 10.2217/fmb-2023-0263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/20/2024] [Indexed: 05/01/2024] Open
Abstract
A higher prevalence of Acinetobacter baumannii infections and mortality rate has been reported recently in hospital-acquired infections (HAI). The biofilm-forming capability of A. baumannii makes it an extremely dangerous pathogen, especially in device-associated hospital-acquired infections (DA-HAI), thereby it resists the penetration of antibiotics. Further, the transmission of the SARS-CoV-2 virus was exacerbated in DA-HAI during the epidemic. This review specifically examines the complex interconnections between several components and genes that play a role in the biofilm formation and the development of infections. The current review provides insights into innovative treatments and therapeutic approaches to combat A. baumannii biofilm-related infections, thereby ultimately improving patient outcomes and reducing the burden of HAI.
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Affiliation(s)
- Seetha Lakshmi Rajangam
- Department of Genetic Engineering, School of Bioengineering, College of Engineering & Technology, SRM Institute of Science & Technology, Kattankulathur, Chennai, Tamil Nadu, 603203, India
| | - Manoj Kumar Narasimhan
- Department of Genetic Engineering, School of Bioengineering, College of Engineering & Technology, SRM Institute of Science & Technology, Kattankulathur, Chennai, Tamil Nadu, 603203, India
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Nanomaterial Constructs for Catalytic Applications in Biomedicine: Nanobiocatalysts and Nanozymes. Top Catal 2022; 66:707-722. [PMID: 36597435 PMCID: PMC9798949 DOI: 10.1007/s11244-022-01766-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2022] [Indexed: 12/30/2022]
Abstract
Nanomaterials possess superior advantages due to their special geometries, higher surface area, and unique mechanical, optical, and physicochemical properties. Their characteristics make them great contributors to the development of many technological and industrial sectors. Therefore, novel nanomaterials have an increasing interest in many research areas including biomedicine such as chronic inflammations, disease detection, drug delivery, and infections treatment. Their relevant role is, in many cases, associated with an effective catalytic application, either as a pure catalyst (acting as a nanozyme) or as a support for catalytically active materials (forming nanobiocatalysts). In this review, we analyze the construction of nanozymes and nanobiocatalyst by different existing forms of nanomaterials including carbon-based nanomaterials, metal-based nanomaterials, and polymer-based nanocomposites. Then, we examine successful examples of such nanomaterials employed in biomedical research. The role played by nanomaterials in catalytic applications is analyzed to identify possible research directions toward the development of the field and the achievement of real practicability. Graphical Abstract
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Huang P, Su W, Han R, Lin H, Yang J, Xu L, Ma L. Physicochemical, Antibacterial Properties, and Compatibility of ZnO-NP/Chitosan/β-Glycerophosphate Composite Hydrogels. J Microbiol Biotechnol 2022; 32:522-530. [PMID: 35001011 PMCID: PMC9628871 DOI: 10.4014/jmb.2111.11024] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/26/2021] [Accepted: 01/05/2022] [Indexed: 12/15/2022]
Abstract
In this study we aimed to develop novel ZnO-NP/chitosan/β-glycerophosphate (ZnO-NP/CS/β-GP) antibacterial hydrogels for biomedical applications. According to the mass fraction ratio of ZnO-NPs to chitosan, mixtures of 1, 3, and 5% ZnO-NPs/CS/β-GP were prepared. Using the test-tube inversion method, scanning electron microscopy and Fourier-transform infrared spectroscopy, the influence of ZnO-NPs on gelation time, chemical composition, and cross-sectional microstructures were evaluated. Adding ZnO-NPs significantly improved the hydrogel's antibacterial activity as determined by bacteriostatic zone and colony counting. The hydrogel's bacteriostatic mechanism was investigated using live/dead fluorescent staining and scanning electron microscopy. In addition, crystal violet staining and MTT assay demonstrated that ZnO-NPs/CS/β-GP exhibited good antibacterial activity in inhibiting the formation of biofilms and eradicating existing biofilms. CCK-8 and live/dead cell staining methods revealed that the cell viability of gingival fibroblasts (L929) cocultured with hydrogel in each group was above 90% after 24, 48, and 72 h. These results suggest that ZnO-NPs improve the temperature sensitivity and bacteriostatic performance of chitosan/β-glycerophosphate (CS/β-GP), which could be injected into the periodontal pocket in solution form and quickly transformed into hydrogel adhesion on the gingiva, allowing for a straightforward and convenient procedure. In conclusion, ZnO-NP/CS/β-GP thermosensitive hydrogels could be expected to be utilized as adjuvant drugs for clinical prevention and treatment of peri-implant inflammation.
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Affiliation(s)
- Pingping Huang
- The Affiliated Hospital of Qingdao University, Qingdao 266003, P.R. China,School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Wen Su
- School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Rui Han
- The Affiliated Hospital of Qingdao University, Qingdao 266003, P.R. China,School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Hao Lin
- School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Jing Yang
- School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Libin Xu
- School of Stomatology of Qingdao University, Qingdao 266003, P.R. China
| | - Lei Ma
- The Affiliated Hospital of Qingdao University, Qingdao 266003, P.R. China,School of Stomatology of Qingdao University, Qingdao 266003, P.R. China,Corresponding author Phone: +86-18653271498 Fax: +86-82911782 E-mail:
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