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Pongsanon P, Kawamura A, Kawasaki H, Miyata T. Effect of Gold Nanoparticle Size on Regulated Catalytic Activity of Temperature-Responsive Polymer-Gold Nanoparticle Hybrid Microgels. Gels 2024; 10:357. [PMID: 38920904 PMCID: PMC11202582 DOI: 10.3390/gels10060357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/13/2024] [Accepted: 05/19/2024] [Indexed: 06/27/2024] Open
Abstract
Gold nanoparticles (AuNPs) possess attractive electronic, optical, and catalytic properties, enabling many potential applications. Poly(N-isopropyl acrylamide) (PNIPAAm) is a temperature-responsive polymer that changes its hydrophilicity upon a slight temperature change, and combining PNIPAAm with AuNPs allows us to modulate the properties of AuNPs by temperature. In a previous study, we proposed a simpler method for designing PNIPAAm-AuNP hybrid microgels, which used an AuNP monomer with polymerizable groups. The size of AuNPs is the most important factor influencing their catalytic performance, and numerous studies have emphasized the importance of controlling the size of AuNPs by adjusting their stabilizer concentration. This paper focuses on the effect of AuNP size on the catalytic activity of PNIPAAm-AuNP hybrid microgels prepared via the copolymerization of N-isopropyl acrylamide and AuNP monomers with different AuNP sizes. To quantitatively evaluate the catalytic activity of the hybrid microgels, we monitored the reduction of 4-nitrophenol to 4-aminophenol using the hybrid microgels with various AuNP sizes. While the hybrid microgels with an AuNP size of 13.0 nm exhibited the highest reaction rate and the apparent reaction rate constant (kapp) of 24.2 × 10-3 s-1, those of 35.9 nm exhibited a small kapp of 1.3 × 10-3 s-1. Thus, the catalytic activity of the PNIPAAm-AuNP hybrid microgel was strongly influenced by the AuNP size. The hybrid microgels with various AuNP sizes enabled the reversibly temperature-responsive on-off regulation of the reduction reaction.
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Affiliation(s)
- Palida Pongsanon
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
| | - Akifumi Kawamura
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
| | - Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
| | - Takashi Miyata
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
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Zelikovich D, Dery L, Sagi-Cohen H, Mandler D. Imprinting of nanoparticles in thin films: Quo Vadis? Chem Sci 2023; 14:9630-9650. [PMID: 37736620 PMCID: PMC10510851 DOI: 10.1039/d3sc02178e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/01/2023] [Indexed: 09/23/2023] Open
Abstract
Nanomaterials, and especially nanoparticles, have been introduced to almost any aspect of our lives. This has caused increasing concern as to their toxicity and adverse effects on the environment and human health. The activity of nanoparticles, including their nanotoxicity, is not only a function of the material they are made of but also their size, shape, and surface properties. It is evident that there is an unmet need for simple approaches to the speciation of nanoparticles, namely to monitor and detect them based on their properties. An appealing method for such speciation involves the imprinting of nanoparticles in soft matrices. The principles of imprinting nanoparticles originate from the molecularly imprinted polymer (MIP) approach. This review summarizes the current status of this emerging field, which bridges between the traditional MIP approach and the imprinting of larger entities such as viruses and bacteria. The concepts of nanoparticle imprinting and the requirement of both physical and chemical matching between the nanoparticles and the matrix are discussed and demonstrated.
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Affiliation(s)
- Din Zelikovich
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Linoy Dery
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Hila Sagi-Cohen
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Daniel Mandler
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
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Sakai S, Hirano Y, Kobayashi Y, Arai N. Effect of temperature on the structure and drug-release behaviour of inclusion complex of β-cyclodextrin with cyclophosphamide: a molecular dynamics study. SOFT MATTER 2023; 19:2902-2907. [PMID: 36987748 DOI: 10.1039/d2sm01542k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Cyclodextrins (CDs) are suitable drug carriers because of their doughnut-shaped cavities with hydrophilic outer and hydrophobic inner surfaces. Temperature-responsive CD-based drug carriers are expected to be one of the most promising candidates for drug delivery systems. In this study, we performed molecular dynamics simulations of the inclusion complex of β-CD with cyclophosphamide (CP) at temperatures from 300 K to 400 K to investigate the temperature dependency of the release behaviour of CP and structural changes of β-CD in an aqueous solution. We analysed the distance between the centres of mass of β-CD and CP and the radius of gyration of β-CD. The CP molecule was released from the β-CD cavity at 400 K, whereas two different inclusion complexes, partially and completely, were observed at T < 400 K. β-CD encapsulating a CP molecule had a more spherical shape and rigidity than β-CD without a CP, and the rigidity of their inclusion complex decreased with increasing temperature. Our findings provide fundamental insights into the behaviours of the β-CD/CP complex and drug release at the molecular level and can facilitate the development of new temperature-responsive drug delivery systems with CD nanocarriers triggered by localised temperature increases using focused ultrasound.
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Affiliation(s)
- Seiga Sakai
- Department of Mechanical Engineering, Keio University, Yokohama, Kanagawa 223-8522, Japan.
| | - Yoshinori Hirano
- Department of Mechanical Engineering, Keio University, Yokohama, Kanagawa 223-8522, Japan.
| | - Yusei Kobayashi
- Department of Mechanical Engineering, Keio University, Yokohama, Kanagawa 223-8522, Japan.
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Keio University, Yokohama, Kanagawa 223-8522, Japan.
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Ihsan AB, Imran AB, Susan MABH. Advanced Functional Polymers: Properties and Supramolecular Phenomena in Hydrogels and Polyrotaxane-based Materials. CHEMISTRY AFRICA 2023; 6:79-94. [DOI: 10.1007/s42250-022-00460-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/20/2022] [Indexed: 09/01/2023]
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Feng Q, Huang XY, Feng YM, Sun LJ, Sun JY, Li Y, Xie X, Hu J, Guo CY. Identification and analysis of B cell epitopes of hemagglutinin of H1N1 influenza virus. Arch Microbiol 2022; 204:594. [PMID: 36053375 PMCID: PMC9438888 DOI: 10.1007/s00203-022-03133-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/06/2022] [Accepted: 07/10/2022] [Indexed: 11/27/2022]
Abstract
The frequent variation of influenza virus hemagglutinin (HA) antigen is the main cause of influenza pandemic. Therefore, the study of B cell epitopes of HA is of great significance in the prevention and control of influenza virus. In this study, the split vaccine of 2009 H1N1 influenza virus was used as immunogen, and the monoclonal antibodies (mAbs) were prepared by conventional hybridoma fusion and screening techniques. The characteristics of mAbs were identified by ELISA method, Western-blot test and hemagglutination inhibition test (HI). Using the obtained mAbs as a tool, the B cell epitopes of HA were predicted by ELISA blocking test, sandwich ELISA method and computer simulation method. Finally, four mAbs against HA antigen of H1N1 influenza virus were obtained. The results of ELISA and computer prediction showed that there were at least two types of epitopes on HA of influenza virus. The results of this study complemented the existing methods for predicting HA epitopes, and also provided a new method for predicting other pathogenic microorganisms.
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Affiliation(s)
- Qing Feng
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Xiao-Yan Huang
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
| | - Yang-Meng Feng
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Li-Jun Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Jing-Ying Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Yan Li
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China
| | - Xin Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Science, Northwest University, Xi'an, China
| | - Jun Hu
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China.
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China.
| | - Chun-Yan Guo
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Xi'an, Shaanxi, China.
- Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi, China.
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