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Li T, Li Z, Chen F, Zhu L, Tang H, Wang D, Tang Z. Impact of BSA and Au 3+ concentration on the formation and fluorescence properties of Au nanoclusters. RSC Adv 2024; 14:19284-19293. [PMID: 38887651 PMCID: PMC11181134 DOI: 10.1039/d4ra01140f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 06/10/2024] [Indexed: 06/20/2024] Open
Abstract
Bovine serum albumin-stabilized Au nanoclusters (BSA-Au NCs) have emerged as promising contenders for imaging agents and highly sensitive fluorescence sensors due to their biocompatibility and strong photoluminescence. Optimizing the synthesis conditions of BSA-Au NCs is crucial for enhancing fluorescence imaging and other nanocluster applications. In this study, for the first time, we systematically investigated the effects of BSA concentration and Au3+ on both particle size and optical characteristics of BSA-Au NCs. When the two components achieved a suitable concentration ratio, it was beneficial to form BSA-Au NCs with a high quantum yield (QY = 74.30%) and good fluorescence stability. In contrast, an inappropriate concentration ratio would lead to the formation of gold nanoparticles (Au NPs), and their internal filtration effect (IFE) would attenuate the fluorescence emission of BSA-Au NCs. The BSA-Au NCs were then employed as efficient fluorescence sensors for detecting Hg2+. Furthermore, the growth mechanism of BSA-Au NCs was elucidated by monitoring fluorescence changes during different incubation times. The BSA-Au NCs with a high quantum yield introduce a novel synthetic concept for sensitive fluorescent probes and expanding versatile applications of BSA-Au NCs in catalysis, chemical sensing and biomedicine.
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Affiliation(s)
- Tao Li
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University Chongqing China
| | - Zhuo Li
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University Chongqing China
| | - Fengjiao Chen
- Department of Clinical Laboratory, The First Affiliated Hospital of Chongqing Medical University Chongqing China
| | - Liying Zhu
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University Guiyang China
| | - Hua Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University Chongqing China
| | - Dan Wang
- Post-Doctoral Research Center, The People's Hospital of Rongchang District Chongqing China
| | - Zhenrong Tang
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Chongqing Medical University Chongqing China
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2
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Cheng B, Xia X, Han Z, Yu H, Xie Y, Guo Y, Yao W, Qian H, Cheng Y. A ratiometric fluorescent "off-on" sensor for acrylamide detection in toast based on red-emitting copper nanoclusters stabilized by bovine serum albumin. Food Chem 2024; 437:137878. [PMID: 37913709 DOI: 10.1016/j.foodchem.2023.137878] [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: 06/14/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
Acrylamide, as a Class 2A carcinogen, poses serious threats to human health. To achieve rapid and accurate determination of acrylamide in food, a ratiometric fluorescent "off-on" sensor was designed by incorporating red-emitting copper nanoclusters and glutathione. Copper nanoclusters with bimodal emission at 395 nm and 650 nm (excited at 310 nm) were synthesized by using bovine serum albumin as the ligand and ascorbic acid as the reductant. With glutathione addition, the fluorescence intensity at 650 nm gradually decreased, while the case at 395 nm slightly increased. The quenched fluorescence at 650 nm was subsequently restored by acrylamide through thiol-ene Michael addition reaction between acrylamide and glutathione. The constructed sensor showed excellent performance towards acrylamide detection in the range of 5-300 μM with a detection limit of 1.48 μM, and was further applied to real-sample detection of acrylamide in toast and exhibited good recoveries (90.29-101.30 %), indicating potential applications of this sensor.
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Affiliation(s)
- Baoxin Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xiuhua Xia
- Wuxi Vocational Institute of Commerce, Wuxi 214122, China
| | - Zhiqiang Han
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Hang Yu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Yufei Xie
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Yahui Guo
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Weirong Yao
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - He Qian
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Yuliang Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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3
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Zhang X, Huang Z, Zhang L, Yang W. Synthesis of Au Nanoclusters by Reduction of Bovine Serum Albumin: The Role of Sodium Hydroxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6748-6755. [PMID: 37144972 DOI: 10.1021/acs.langmuir.3c00252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Using bovine serum albumin (BSA) as both a reductant and ligand had been developed as one of the most used approaches for synthesis of fluorescent Au nanoclusters (NCs), in which first HAuCl4 and BSA were mixed together and then NaOH was added to the mixture after a certain time to obtain the Au NCs. In this work, the role of sodium hydroxide in the formation and emission properties of the Au NCs was investigated systematically. It was revealed, for the first time, that activity of the gold precursor and, thus, emission properties of the resulting Au NCs are dependent upon the addition time of sodium hydroxide. Meanwhile, the reducing ability of BSA is dependent upon the concentration of sodium hydroxide added to the reaction solution. By optimization of the addition time and concentration of sodium hydroxide used, Au NCs with improved emission properties were successfully synthesized under relatively low BSA concentrations, which showed improved performance toward the sensing of Cu2+ ions.
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Affiliation(s)
- Xiaoyu Zhang
- Engineering Research Center for Nanomaterials, Henan University, Zhengzhou, Henan 450000, People's Republic of China
| | - Zhenzhen Huang
- College of Chemistry, Jilin University, Changchun, Jilin 130012, People's Republic of China
| | - Lin Zhang
- Engineering Research Center for Nanomaterials, Henan University, Zhengzhou, Henan 450000, People's Republic of China
| | - Wensheng Yang
- Engineering Research Center for Nanomaterials, Henan University, Zhengzhou, Henan 450000, People's Republic of China
- College of Chemistry, Jilin University, Changchun, Jilin 130012, People's Republic of China
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4
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Sun Y, Zhou Z, Peng P, Shu T, Su L, Zhang X. Protein-Directed Au(0)-Rich Gold Nanoclusters as Ratiometric Luminescence Sensors for Auric Ions via Comproportionation-Induced Emission Enhancement. Anal Chem 2023; 95:5886-5893. [PMID: 36971524 DOI: 10.1021/acs.analchem.2c04718] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Gold nanoclusters (Au NCs) are widely used as fluorescent probes in biomedical sensing and imaging due to their versatile optical properties and low cytotoxicity. Surface engineering of gold nanoclusters (Au NCs) aims to design a surface with versatile physicochemical performances, but previous investigations have primarily focused on the acquisition of the "brightest" species. This has resulted in other types of Au NC being neglected. In the present study, our group prepared a series of Au NCs that were rich in surface Au(0), using the "aged" form of bovine serum albumin (BSA) via controlling the pH during synthesis. We found that slight increases of alkalinity during synthesis over that which produced Au NCs with the most intensive photoluminescence generated the "darkest" Au NCs, which exhibited the strongest absorption. These Au NCs included more Au atoms and had a higher Au(0) content. Furthermore, the addition of Au3+ quenched the emission of the "brightest" Au NCs, but increased that of the "darkest" Au NCs. The increased Au(I) proportion observed in the Au3+-treated "darkest" Au NCs resulted in a novel comproportionation-induced emission enhancement effect, which we utilized to construct a "turn-on" ratiometric sensor for toxic Au3+. The addition of Au3+ generated simultaneous, opposite effects on blue-emissive diTyr BSA residues and red-emissive Au NCs. After optimization, we successfully constructed ratiometric sensors for Au3+ with high sensitivity, selectivity, and accuracy. This study will inspire a new pathway to redesign the protein-framed Au NCs and analytical methodology via comproportionation chemistry.
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Cai Z, Wei Y, Shi A, Zhong J, Rao P, Wang Q, Zhang H. Correlation between interfacial layer properties and physical stability of food emulsions: current trends, challenges, strategies, and further perspectives. Adv Colloid Interface Sci 2023; 313:102863. [PMID: 36868168 DOI: 10.1016/j.cis.2023.102863] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 03/02/2023]
Abstract
Emulsions are thermodynamically unstable systems that tend to separate into two immiscible phases over time. The interfacial layer formed by the emulsifiers adsorbed at the oil-water interface plays an important role in the emulsion stability. The interfacial layer properties of emulsion droplets have been considered the cutting-in points that influence emulsion stability, a traditional motif of physical chemistry and colloid chemistry of particular significance in relation to the food science and technology sector. Although many attempts have shown that high interfacial viscoelasticity may contribute to long-term emulsion stability, a universal relationship for all cases between the interfacial layer features at the microscopic scale and the bulk physical stability of the emulsion at the macroscopic scale remains to be established. Not only that, but integrating the cognition from different scales of emulsions and establishing a unified single model to fill the gap in awareness between scales also remain challenging. In this review, we present a comprehensive overview of recent progress in the general science of emulsion stability with a peculiar focus on interfacial layer characteristics in relation to the formation and stabilization of food emulsions, where the natural origin and edible safety of emulsifiers and stabilizers are highly requested. This review begins with a general overview of the construction and destruction of interfacial layers in emulsions to highlight the most important physicochemical characteristics of interfacial layers (formation kinetics, surface load, interactions among adsorbed emulsifiers, thickness and structure, and shear and dilatational rheology), and their roles in controlling emulsion stability. Subsequently, the structural effects of a series of typically dietary emulsifiers (small-molecule surfactants,proteins, polysaccharides, protein-polysaccharide complexes, and particles) on oil-water interfaces in food emulsions are emphasized. Finally, the main protocols developed for modifying the structural characteristics of adsorbed emulsifiers at multiple scales and improving the stability of emulsions are highlighted. Overall, this paper aims to comprehensively study the literature findings in the past decade and find out the commonality of multi-scale structures of emulsifiers, so as to deeply understand the common characteristics and emulsification stability behaviour of adsorption emulsifiers with different interfacial layer structures. It is difficult to say that there has been significant progress in the underlying principles and technologies in the general science of emulsion stability over the last decade or two. However, the correlation between interfacial layer properties and physical stability of food emulsions promotes revealing the role of interfacial rheological properties in emulsion stability, providing guidance on controlling the bulk properties by tuning the interfacial layer functionality.
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Affiliation(s)
- Zhixiang Cai
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yue Wei
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China
| | - Jian Zhong
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Pingfan Rao
- Food Nutrition Sciences Centre, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China.
| | - Hongbin Zhang
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China..
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6
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Wang D, Gao X, Jia J, Zhang B, Zou G. Valence-State-Engineered Electrochemiluminescence from Au Nanoclusters. ACS NANO 2023; 17:355-362. [PMID: 36534370 DOI: 10.1021/acsnano.2c08474] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
To determine the intrinsic effects of body elements on the electrochemiluminescence (ECL) of metal nanoclusters (NCs), herein, a valence-state engineering strategy is developed to adjust the NCs' ECL with bovine serum albumin (BSA)-stabilized AuNCs as a model, in which engineering the valence state of the Au body element, i.e., Au(0) and Au(I), is performed via successively reducing the precursor AuCl4- to Au(I) and Au(0) with BSA. The obtained BSA-AuNCs/N2H4 system leads to three anodic ECL processes at 0.37 (ECL-1), 0.85 (ECL-2), and 1.45 V (ECL-3). ECL-1 is generated from the BSA-Au(0) section of BSA-AuNCs in a surface-defect-involved route and is much stronger and red-shifted compared to ECL-2 and ECL-3, which are generated from the BSA-Au(I) section of BSA-AuNCs in the band-gap-engineered route. Each of the anodic ECL processes can be selectively generated and/or suppressed via adjusting the Au(I)/Au(0) ratio of BSA-AuNCs, tunable ECL generation route, and triggering potential, and the emission intensity and waveband of metal NCs are conveniently achieved in body-element-involved valence-state engineering.
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Affiliation(s)
- Dongyang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
| | - Xuwen Gao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
| | - Jingna Jia
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
| | - Bin Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
| | - Guizheng Zou
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
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Hu S, Zhou G, Xu X, Zhang W, Li C. Insight into the impacts of Jinhua ham processing conditions on cathepsin B activity and conformation changes based on molecular simulation. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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8
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Joshi DJ, Lalrinhlupuii, Malek NI, Muthukumaran RB, Kailasa SK. Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb 2+ And Hg 2+ Ions in Water and Tobacco Samples. APPLIED SPECTROSCOPY 2022; 76:1234-1245. [PMID: 35477299 DOI: 10.1177/00037028221100544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, a microwave assisted method was developed for synthesis of red fluorescent copper nanoclusters (NCs) using trypsin as a template (trypsin-Cu). The as-synthesized trypsin-Cu NCs are stable and water soluble, exhibiting fluorescence emission at 657 nm when excited at 490 nm. The as-prepared red-emitting trypsin-Cu NCs were characterized by using several analytical techniques such as ultraviolet-visible (UV-Vis) and fluorescence, fluorescence lifetime, Fourier transform infrared, and X-ray photoelectron spectroscopic techniques. Red-emitting trypsin-Cu NCs acted as a nanosensor for sensing both Pb2+ and Hg2+ ions through fluorescence quenching. Using this approach, good linearities are observed in the range of 0.1-25 and of 0.001-1 μM with the lower limit of detection of 14.63 and 56.81 nM for Pb2+ and Hg2+ ions, respectively. Trypsin-Cu NCs-based fluorescence assay was successfully applied to detect both Hg2+ and Pb2+ ions in water and tobacco samples.
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Affiliation(s)
- Dharaben J Joshi
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Lalrinhlupuii
- Department of Chemistry, 29670Mizoram University, Aizawl, India
| | - Naved I Malek
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | | | - Suresh Kumar Kailasa
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
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Tang Z, Chen F, Wang D, Xiong D, Yan S, Liu S, Tang H. Fabrication of avidin-stabilized gold nanoclusters with dual emissions and their application in biosensing. J Nanobiotechnology 2022; 20:306. [PMID: 35761380 PMCID: PMC9235210 DOI: 10.1186/s12951-022-01512-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 06/16/2022] [Indexed: 11/26/2022] Open
Abstract
Protein-stabilized gold nanoclusters (Prot-Au NCs) have been widely used in biosensing and cell imaging owing to their excellent optical properties and low biotoxicity. However, several Prot-Au NCs reported in the literature do not retain the biological role of the protein, which greatly limits their ability to directly detect biomarkers. This study demonstrated for the first time the successful synthesis of dual-function avidin-stabilized gold nanoclusters (Av–Au NCs) using a one-pot method. The resulting Av–Au NCs exhibited intense blue and red emissions under 374 nm excitation. Furthermore, the Av–Au NCs retained the native functionality of avidin to bind to biotin. When DNA strands modified with biotin at both ends (i.e., linker chains) were mixed with Av–Au NCs, large polymers were formed, indicating that Av–Au NCs could achieve fluorescence signal amplification by interacting with biotin. Taking advantage of the aforementioned properties, we constructed a novel enzyme-free fluorescent biosensor based on the Av–Au NCs-biotin system to detect DNA. The designed fluorescent biosensor could detect target DNA down to 0.043 nM, with a wide line range from 0.2 nM to 20 µM. Thus, these dual-functional Av–Au NCs were shown to be an excellent fluorescent material for biosensing. Avidin-stabilized gold nanoclusters (Av–Au NCs) were synthesized for the first time by a water-bath method. The synthesized Av–Au NCs not only exhibited intense blue and red emissions under 374 nm excitation, but also retained the native functionality of avidin to bind to biotin. The fluorescent signal amplification system constructed by the interaction of Av–Au NCs with biotin was successfully applied to detect target DNA in vitro.
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Affiliation(s)
- Zhenrong Tang
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400042, China
| | - Fengjiao Chen
- Guangshan County People's Hospital, Xinyang, 465450, Henan, China
| | - Dan Wang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Department of Infectious Diseases, Institute for Viral Hepatitis, The Second Affiliated Hospital, Chongqing Medical University, 1 Yi Xue Yuan Road, Chongqing, 400016, China
| | - Dongmei Xiong
- Nursing School of Chongqing Medical and Pharmaceutical College, Chongqing, 401331, China
| | - Shaoying Yan
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Shengchun Liu
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400042, China.
| | - Hua Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Department of Infectious Diseases, Institute for Viral Hepatitis, The Second Affiliated Hospital, Chongqing Medical University, 1 Yi Xue Yuan Road, Chongqing, 400016, China.
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Ostruszka R, Zoppellaro G, Tomanec O, Pinkas D, Filimonenko V, Šišková K. Evidence of Au(II) and Au(0) States in Bovine Serum Albumin-Au Nanoclusters Revealed by CW-EPR/LEPR and Peculiarities in HR-TEM/STEM Imaging. NANOMATERIALS 2022; 12:nano12091425. [PMID: 35564133 PMCID: PMC9105226 DOI: 10.3390/nano12091425] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/11/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023]
Abstract
Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of microscopic investigations performed via high-resolution transmission electron microscopy (HR-TEM), scanning transmission electron microscopy (STEM), and energy dispersive X-ray analysis (EDS). To the best of our knowledge, this is the first report analyzing the BSA-AuNCs by CW-EPR/LEPR technique. Besides the presence of Au(0) and Au(I) oxidation states in BSA-AuNCs, the authors observe a significant amount of Au(II), which may result from a disproportionation event occurring within NCs: 2Au(I) → Au(II) + Au(0). Based on the LEPR experiments, and by comparing the behavior of BSA versus BSA-AuNCs under UV light irradiation (at 325 nm) during light off-on-off cycles, any energy and/or charge transfer event occurring between BSA and AuNCs during photoexcitation can be excluded. According to CW-EPR results, the Au nano assemblies within BSA-AuNCs are estimated to contain 6–8 Au units per fluorescent cluster. Direct observation of BSA-AuNCs by STEM and HR-TEM techniques confirms the presence of such diameters of gold nanoclusters in BSA-AuNCs. Moreover, in situ formation and migration of Au nanostructures are observed and evidenced after application of either a focused electron beam from HR-TEM, or an X-ray from EDS experiments.
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Affiliation(s)
- Radek Ostruszka
- Department of Experimental Physics, Faculty of Science, Palacký University, tř. 17. Listopadu 12, 77900 Olomouc, Czech Republic;
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, tř. 17. Listopadu 12, 77900 Olomouc, Czech Republic;
- Correspondence: (G.Z.); (K.Š.)
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, tř. 17. Listopadu 12, 77900 Olomouc, Czech Republic;
| | - Dominik Pinkas
- Institute of Molecular Genetics of the Czech Academy of Sciences, Microscopy Centre, Electron Microscopy Core Facility, Vídeňská 1083, 14220 Prague, Czech Republic; (D.P.); (V.F.)
| | - Vlada Filimonenko
- Institute of Molecular Genetics of the Czech Academy of Sciences, Microscopy Centre, Electron Microscopy Core Facility, Vídeňská 1083, 14220 Prague, Czech Republic; (D.P.); (V.F.)
| | - Karolína Šišková
- Department of Experimental Physics, Faculty of Science, Palacký University, tř. 17. Listopadu 12, 77900 Olomouc, Czech Republic;
- Correspondence: (G.Z.); (K.Š.)
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Fehér B, Mihály J, Demeter A, Almásy L, Wacha A, Varga Z, Varga I, Pedersen JS, Bóta A. Advancement of Fluorescent and Structural Properties of Bovine Serum Albumin-Gold Bioconjugates in Normal and Heavy Water with pH Conditioning and Ageing. NANOMATERIALS 2022; 12:nano12030390. [PMID: 35159734 PMCID: PMC8840595 DOI: 10.3390/nano12030390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 02/01/2023]
Abstract
The red-emitting fluorescent properties of bovine serum albumin (BSA)–gold conjugates are commonly attributed to gold nanoclusters formed by metallic and ionized gold atoms, stabilized by the protein. Others argue that red fluorescence originates from gold cation–protein complexes instead, not gold nanoclusters. Our fluorescence and infrared spectroscopy, neutron, and X-ray small-angle scattering measurements show that the fluorescence and structural behavior of BSA–Au conjugates are different in normal and heavy water, strengthening the argument for the existence of loose ionic gold–protein complexes. The quantum yield for red-emitting luminescence is higher in heavy water (3.5%) than normal water (2.4%), emphasizing the impact of hydration effects. Changes in red luminescence are associated with the perturbations of BSA conformations and alterations to interatomic gold–sulfur and gold–oxygen interactions. The relative alignment of domains I and II, II and III, III and IV of BSA, determined from small-angle scattering measurements, indicate a loose (“expanded-like”) structure at pH 12 (pD ~12); by contrast, at pH 7 (pD ~7), a more regular formation appears with an increased distance between the I and II domains, suggesting the localization of gold atoms in these regions.
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Affiliation(s)
- Bence Fehér
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
- Neutron Spectroscopy Department, Centre for Energy Research, Konkoly-Thege M. út 29-33, 1121 Budapest, Hungary;
| | - Judith Mihály
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
| | - Attila Demeter
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
- Correspondence: (A.D.); (A.B.)
| | - László Almásy
- Neutron Spectroscopy Department, Centre for Energy Research, Konkoly-Thege M. út 29-33, 1121 Budapest, Hungary;
| | - András Wacha
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
| | - Zoltán Varga
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
| | - Imre Varga
- Institute of Chemistry, Eötvös Loránd University (ELTE), Pázmány Péter sétány 1/A, 1117 Budapest, Hungary;
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark;
| | - Attila Bóta
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; (B.F.); (J.M.); (A.W.); (Z.V.)
- Correspondence: (A.D.); (A.B.)
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Qiao L, Li X, Xiao Y, Yuan J, Yu D, Zuo M, Chen J, Han SS, Du C. Component-optimized chemo-dynamic nanoagent for enhanced tumour cell-selective chemo-dynamic therapy with minimal side effect in glioma mouse model. Biomater Sci 2022; 10:4170-4183. [DOI: 10.1039/d2bm00615d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although CuO-deposited bovine serum albumin (CuO-BSA) and glucose oxidase (Gox) were combined to achieve H2O2 self-supplied chemo-dynamic therapy (CDT) and glucose consumption-based starvation therapy, the uses of copper and Gox...
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13
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Algar WR, Massey M, Rees K, Higgins R, Krause KD, Darwish GH, Peveler WJ, Xiao Z, Tsai HY, Gupta R, Lix K, Tran MV, Kim H. Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging. Chem Rev 2021; 121:9243-9358. [PMID: 34282906 DOI: 10.1021/acs.chemrev.0c01176] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Research related to the development and application of luminescent nanoparticles (LNPs) for chemical and biological analysis and imaging is flourishing. Novel materials and new applications continue to be reported after two decades of research. This review provides a comprehensive and heuristic overview of this field. It is targeted to both newcomers and experts who are interested in a critical assessment of LNP materials, their properties, strengths and weaknesses, and prospective applications. Numerous LNP materials are cataloged by fundamental descriptions of their chemical identities and physical morphology, quantitative photoluminescence (PL) properties, PL mechanisms, and surface chemistry. These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanide-doped upconversion nanoparticles and downshifting nanoparticles, triplet-triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica. As an exercise in the critical assessment of LNP properties, these materials are ranked by several application-related functional criteria. Additional sections highlight recent examples of advances in chemical and biological analysis, point-of-care diagnostics, and cellular, tissue, and in vivo imaging and theranostics. These examples are drawn from the recent literature and organized by both LNP material and the particular properties that are leveraged to an advantage. Finally, a perspective on what comes next for the field is offered.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelly Rees
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rehan Higgins
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Katherine D Krause
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - William J Peveler
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Zhujun Xiao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hsin-Yun Tsai
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rupsa Gupta
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelsi Lix
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Michael V Tran
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hyungki Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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Xu C, Zhang W, Wang R, Tan S, Holub JM, Tang B. Versatile Gold-Coupled Te-Carbon Dots for Quantitative Monitoring and Efficient Scavenging of Superoxide Anions. Anal Chem 2021; 93:9111-9118. [PMID: 34157223 DOI: 10.1021/acs.analchem.1c00844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The superoxide anion (O2•-) is a reactive oxygen species (ROS) that functions as an important regulator of signal transduction in living systems. However, excess O2•- can cause metabolic imbalances and oxidative damage inside cells. Quantitative detection and efficient scavenging of O2•- are therefore critical for maintaining intracellular redox balance and homeostasis. In this work, a nanomaterial (Au-TeCD) composed of BSA-modified gold nanoparticles (AuNPs) complexed with tellurium-containing carbon dots (TeCDs) was constructed. The introduction of Au-TeCDs to solutions containing superoxide resulted in enhanced elimination of the anion, indicating that Au-TeCDs are able to scavenge O2•- from the surrounding environment. Notably, the respective TeCD and AuNP components of the Au-TeCDs were found to emit fluorescence at 425 and 640 nm upon exposure to superoxide anions. This unique spectroscopic property of Au-TeCDs allowed levels of O2•- in solution to be quantified using dual-fluorescence detection. The Au-TeCDs developed herein also exhibited low-cytotoxicity, versatile capabilities for in situ fluorescence imaging, and effective scavenging of O2•- in living cells. Taken together, these results suggest that Au-TeCDs act as effective tools for monitoring superoxide concentrations in complex mixtures and may be developed as possible therapeutics designed to scavenge excess ROS from diseased cells.
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Affiliation(s)
- Chang Xu
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, United States
| | - Wei Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014 P. R. China
| | - Ruixia Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014 P. R. China
| | - Shuzhi Tan
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014 P. R. China
| | - Justin M Holub
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, United States
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014 P. R. China
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15
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Rapid synthesis of fluorescent bovine serum albumin-gold nanoclusters complex for glutathione determination. Mikrochim Acta 2021; 188:193. [PMID: 34009425 DOI: 10.1007/s00604-021-04844-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 05/03/2021] [Indexed: 10/21/2022]
Abstract
A facile one-pot method for synthesis of bovine serum albumin (BSA)-gold nanoclusters (AuNCs) has been developed. The formation of BSA-AuNCs took only 30 s under mild conditions. BSA-AuNCs exhibited strong orange-yellow fluorescence, and the excitation and emission peaks were at 370 nm and 564 nm, respectively. In the process of forming BSA-AuNCs, the molecular chain of BSA has not been destroyed. Moreover, there were a large number of Au cations on the surface of BSA-AuNCs, which had strong oxidizing abilities. The reason for the ultrabright fluorescence of BSA-AuNCs was attributed to the Au(0)@Au(I)@Au(III)-ligand structure on the surface of BSA. In order to evaluate the fluorescence performance of BSA-AuNCs, BSA-AuNCs was used as a probe, realizing the sensitive and selective determination of glutathione (GSH) in a wide linear range of 0.01-0.48 μM and a detection limit of 3.3 nM. The proposed method not only offers a brand-new scheme for synthesizing BSA-AuNCs, but also provides a platform for studying the interaction between metal core and proteins. A facile one-pot method to synthesize ultrabright fluorescent BSA-AuNCs in tens of seconds has been introduced by mixing BSA suspension, KSCN, and HAuCl4. The as-prepared BSA-AuNCs showed intensive orange-yellow fluorescence under a UV lamp (365 nm), and BSA still keeps the integral molecular chains during the whole synthesis process. Moreover, the as-prepared BSA-AuNCs have realized the sensitive and selective detection of glutathione (GSH) in a wide linear range of 0.01-0.48 μM and a detection limit of 3.3 nM.
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Dixon JM, Egusa S. Common Motif at the Red Luminophore in Bovine Serum Albumin-, Ovalbumin-, Trypsin-, and Insulin-Gold Complexes. J Phys Chem Lett 2021; 12:2865-2870. [PMID: 33720724 DOI: 10.1021/acs.jpclett.1c00222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We examined the static and dynamic characters of the red luminescence in the protein-Au(III) compounds, directly comparing multiple proteins: BSA, OVA, trypsin, and insulin. These four protein-Au(III) complexes showed a nearly identical excitation-emission pattern, not only the wavelength of luminescence (λem ∼ 640 nm). Lifetimes of the red luminescence shared a common value of ∼300 ns. Kinetics of the luminophore formation was consistently described by a Langmuir-type chemisorption of Au(III) for these proteins, coinciding with the protein conformation change at pH ∼ 10. These observations and the protein structural analyses support that the red luminophore formation involves Au(III) coordination to a common motif within these proteins.
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Affiliation(s)
- Jacob M Dixon
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina, Charlotte, North Carolina 28223, United States
| | - Shunji Egusa
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina, Charlotte, North Carolina 28223, United States
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17
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Gao Y, Wang G, Gu H, Zhang J, Li W, Fu Y. Cooperatively controlling the enzyme mimicking Pt nanomaterials with nucleotides and solvents. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.126070] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Dixon JM, Egusa S. Limited Proteolysis and Gel Electrophoresis in the Presence of Metal Cations: Au(III)-binding Luminescent Domain in Serum Albumins. J Vis Exp 2021. [PMID: 33554961 DOI: 10.3791/61905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The purpose of the presented protocols is to determine the domain of Au(III) binding in BSA. The BSA-Au(III) compound exhibits ultraviolet (UV)-excitable red luminescence (λem = 640 nm), with unusual Stokes shifts compared to the innate UV/blue fluorescence arising from the aromatic residues. Red-luminescent complexes are formed in highly alkaline conditions above pH 10 and require a conformation change within the protein to occur. In addition, preservation of Cys-Cys disulfide bonds in BSA is necessary to obtain this red luminescence. In order to understand the mechanism of this luminescence, elucidation of the luminophore-forming Au(III) binding site is essential. A facile way to assess the luminophore-forming site would be to (1) predictably fragment the protein by enzymatic digestion, (2) react the obtained fragments with Au(III), then (3) perform gel electrophoresis to observe the well-separated fragment bands and analyze the in-gel red luminescence. However, due to the alkaline conditions and the reaction with metal cations, new limited proteolysis techniques and gel electrophoresis conditions must be applied. Particularly, the presence of metal cations in gel electrophoresis can make the band separations technically difficult. We describe this new protocol in steps to identify the red-luminophore-forming metal binding domain in BSA. This protocol can thus be applied for analyzing protein fragments that must remain in a non-denatured or a partially denatured state, in the presence of metal cations. Because the majority of proteins need metal cations to function, analyses of metal-bound proteins are often desired, which have relied on x-ray crystallography in the literature. This method, on the other hand, could be used in supplement to study the interactions of proteins with metal cations without requiring the protein crystallization and at a desired pH condition.
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Affiliation(s)
- Jacob M Dixon
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina
| | - Shunji Egusa
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina;
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19
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Roberts P, Perry JK, Gupta RK, Karna SP, Frechette J. Confinement-Enhanced Luminescence in Protein-Gold Nanoclusters. J Phys Chem Lett 2020; 11:10278-10282. [PMID: 33216558 DOI: 10.1021/acs.jpclett.0c03054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Confinement has profound effects on protein functions. Nanoscale probes for confinement or excluded volume interactions could help us understand how these interactions influence protein functions. This work reports on the increased luminescence of BSA-gold nanoclusters when confined. Confinement of the BSA-gold nanoclusters occurred within reverse micelles (RMs), where the size of the RMs determined the degree of confinement. The confinement-enhanced luminescence is reversible, i.e., the emission returns to its original value following cyclic changes in RM size. Circular dichroism measurements show an increase in alpha-helical character of the BSA-stabilized nanoclusters with confinement, which could provide a mechanism for the increase in luminescence. The alpha-helical character of the native proteins also increases with confinement, suggesting that the protein-nanocluster might sense confinement in an analogous fashion as the proteins. When the RMs approach the size of the protein, the intensity becomes independent of alpha-helical character, suggesting a different mechanism for the luminescence increase.
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Affiliation(s)
| | - Jeneh Karima Perry
- CCDC Army Research Laboratory, Weapons and Material Research Directorate, 6300 Rodman Road, Aberdeen, Proving Ground, Maryland 21005, United States
| | - Raj K Gupta
- DoD Blast Injury Research Coordinating Office, U.S. Army Medical Research and Development Command, 504 Scott Street, Fort Detrick, Maryland 21702, United States
| | - Shashi P Karna
- CCDC Army Research Laboratory, Weapons and Material Research Directorate, 6300 Rodman Road, Aberdeen, Proving Ground, Maryland 21005, United States
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On the Different Mode of Action of Au(I)/Ag(I)-NHC Bis-Anthracenyl Complexes Towards Selected Target Biomolecules. Molecules 2020; 25:molecules25225446. [PMID: 33233711 PMCID: PMC7699860 DOI: 10.3390/molecules25225446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 12/20/2022] Open
Abstract
Gold and silver N-heterocyclic carbenes (NHCs) are emerging for therapeutic applications. Multiple techniques are here used to unveil the mechanistic details of the binding to different biosubstrates of bis(1-(anthracen-9-ylmethyl)-3-ethylimidazol-2-ylidene) silver chloride [Ag(EIA)2]Cl and bis(1-(anthracen-9-ylmethyl)-3-ethylimidazol-2-ylidene) gold chloride [Au(EIA)2]Cl. As the biosubstrates, we tested natural double-stranded DNA, synthetic RNA polynucleotides (single-poly(A), double-poly(A)poly(U) and triple-stranded poly(A)2poly(U)), DNA G-quadruplex structures (G4s), and bovine serum albumin (BSA) protein. Absorbance and fluorescence titrations, mass spectrometry together with melting and viscometry tests show significant differences in the binding features between silver and gold compounds. [Au(EIA)2]Cl covalently binds BSA. It is here evidenced that the selectivity is high: low affinity and external binding for all polynucleotides and G4s are found. Conversely, in the case of [Ag(EIA)2]Cl, the binding to BSA is weak and relies on electrostatic interactions. [Ag(EIA)2]Cl strongly/selectively interacts only with double strands by a mechanism where intercalation plays the major role, but groove binding is also operative. The absence of an interaction with triplexes indicates the major role played by the geometrical constraints to drive the binding mode.
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21
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Zhang X, Chen M, Zhang Y, Hou Y, Wu Y, Yao M, Li L, Shi L, Liu T, Hu B, Zhao H, Li X, Shi J, Jia B, Wang F. Monoclonal-Antibody-Templated Gold Nanoclusters for HER2 Receptors Targeted Fluorescence Imaging. ACS APPLIED BIO MATERIALS 2020; 3:7061-7066. [DOI: 10.1021/acsabm.0c00905] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xin Zhang
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Big Data and Engineering Research Center, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, No. 56 Nanlishi Road, Beijing 100045, China
| | - Muhua Chen
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Yunwei Zhang
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Yi Hou
- College of Life Science and Technology, Beijing University of Chemical Technology, North Third Ring Road 15, Chaoyang District, Beijing 100029, China
| | - Yue Wu
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Meinan Yao
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Liqiang Li
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Linqing Shi
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Tianyu Liu
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Biao Hu
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Huiyun Zhao
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Medical and Healthy Analytical Center, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Xiaoda Li
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Medical and Healthy Analytical Center, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Jiyun Shi
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Key Laboratory of Protein and Peptide Pharmaceuticals, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road,
Chaoyang District, Beijing 100101, China
| | - Bing Jia
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Fan Wang
- Medical Isotopes Research Center and Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China
- Key Laboratory of Protein and Peptide Pharmaceuticals, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road,
Chaoyang District, Beijing 100101, China
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Guo Y, Amunyela HTNN, Cheng Y, Xie Y, Yu H, Yao W, Li HW, Qian H. Natural protein-templated fluorescent gold nanoclusters: Syntheses and applications. Food Chem 2020; 335:127657. [PMID: 32738539 DOI: 10.1016/j.foodchem.2020.127657] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 07/01/2020] [Accepted: 07/21/2020] [Indexed: 12/19/2022]
Abstract
For the past decades, the synthesis of metal nanoclusters has been a great interest for research, for their unique physicochemical properties and great contributions to the catalytic, electrical and biomedical applications. Protein-templated gold nanoclusters (AuNCs) is a kind of fluorescent nanomaterials with good solubility, excellent stability, biocompatibility, decent quantum yields and active groups (-COOH, -NH2) for facilitating modifications. Natural proteins are easily available, commercially affordable, diverse and multitudinous in animals, plants and foods, which provide a template pool for the exploration of AuNCs. This is one of the few reviews of specifically focusing on the natural protein-templated fluorescent AuNCs. The syntheses, properties and applications of different AuNCs were enumerated. Prospects were given on utilizing structure-modified proteins, bioactive enzymes, antibodies which should endow the AuNCs more favourable fluorescence performances and functional characteristics. The applications of AuNCs in analytical, biomedical and food sciences would be further heightened.
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Affiliation(s)
- Yahui Guo
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Helena T N N Amunyela
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yuliang Cheng
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yunfei Xie
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hang Yu
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Weirong Yao
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hung-Wing Li
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
| | - He Qian
- State Key Laboratory of Food Science and Technology, National Center for Technology Innovation on Fast Biological Detection of Grain Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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Fehér B, Lyngsø J, Bartók B, Mihály J, Varga Z, Mészáros R, Pedersen JS, Bóta A, Varga I. Effect of pH on the conformation of bovine serume albumin - gold bioconjugates. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113065] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Palermo GA, Tarannum M, Egusa S. Luminescence Onset and Mechanism of the Formation of Gold(I)-Thiolate Complexes as the Precursors to Nanoparticles. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:11248-11255. [PMID: 34552684 PMCID: PMC8455096 DOI: 10.1021/acs.jpcc.0c02725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Gold(I) (Au(I))-thiolate complexes are widely believed as the precursors to Au nanoparticle formations. While the literature suggests that the Au(III)-to-thiol ligand stoichiometric ratio of 1:3 is required to reduce a Au(III) and yield a Au(I)-thiolate, other stoichiometric ratios are also known to produce Au nanoparticles upon reduction. Using the characteristic red luminescence of Au(I)-alkanethiolates, we examined the process of their formations and their implications on the Au nanoparticle synthesis in detail. The onset of the luminescence, correlated with the Au(I)-thiolate formation, as well as the kinetics of the luminophore formation were evaluated in terms of the Au(III)-to-alkanethiol ratios. The onset of the luminescence was affected significantly by the solvent polarity during reaction but not post reaction. We found that the kinetics of the luminophore formation can vary widely, requiring from minutes to 24 h for completion depending on the thiol ligands and molar ratios, as well as solvents. This information could help in designing Au nanoparticle syntheses with the logical choice of Au(III)-to-thiol ratio, solvent, and the timing of reduction.
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Affiliation(s)
- Gabriel A Palermo
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina, Charlotte, North Carolina 28223, United States
| | - Mehnaz Tarannum
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina, Charlotte, North Carolina 28223, United States
| | - Shunji Egusa
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, The University of North Carolina, Charlotte, North Carolina 28223, United States
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25
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Dixon JM, Tomida J, Egusa S. Identifying the Red-Luminophore-Forming Domain in Serum Albumin-Gold Complexes. J Phys Chem Lett 2020; 11:3345-3349. [PMID: 32294382 DOI: 10.1021/acs.jpclett.0c00805] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Serum albumin-gold complexes exhibit UV-excitable red luminescence (λem = 640 nm) with unusual Stokes shifts compared with the innate UV/blue fluorescence arising from the aromatic residues. In order to understand the mechanism of this luminescence, we employed limited proteolysis and molecular cloning techniques and assessed the domain containing the red luminophore in bovine serum albumin (BSA) and human serum albumin (HSA). We identified that the luminophore is localized in a domain of serum albumin, residing within the N-terminus half.
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26
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Nain A, Tseng YT, Wei SC, Periasamy AP, Huang CC, Tseng FG, Chang HT. Capping 1,3-propanedithiol to boost the antibacterial activity of protein-templated copper nanoclusters. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121821. [PMID: 31879116 DOI: 10.1016/j.jhazmat.2019.121821] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/27/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
We have prepared copper nanoclusters (Cu NCs) in the presence of bovine serum albumin (BSA) and 1,3-propanedithiol (PDT). The PDT/BSA-Cu NCs possess great activities against different types of bacteria, including non-multidrug-resistant bacteria (Escherichia coli, Salmonella Enteritidis, Pseudomonas aeruginosa, and Staphylococcus aureus) and multidrug-resistant bacteria (methicillin-resistant S. aureus). Their minimal inhibitory concentration (MIC) values are at least 242-fold and 10-fold lower than that of the free PDT and BSA-Cu NCs, respectively. The PDT/BSA-Cu NCs are strongly bound to the bacterial membrane, in which they induce the generation of ascorbyl (Asc) and perhydroxyl (HOO) radicals that result in disruption of their membrane integrity. At a concentration of 100-fold higher than their MIC for Escherichia coli, the PDT/BSA-Cu NCs exhibit negligible cytotoxicity towards the tested mammalian cells and show insignificant hemolysis. We have further demonstrated that low-cost PDT/BSA-Cu NCs-coated carbon fiber fabrics (CFFs) are effective against antibacterial growth, showing their great potential for antifouling applications.
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Affiliation(s)
- Amit Nain
- Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan; Nano Science and Technology Program, Taiwan International Graduate Program, Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan; Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Ting Tseng
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Shih-Chun Wei
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | | | - Chih-Ching Huang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan; Research Center for Applied Sciences Academia Sinica, Taipei, 11529, Taiwan; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan.
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan; Department of Chemistry, Chung Yuan Christian University, Chungli District, Taoyuan City, 32023, Taiwan.
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27
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Shu T, Sun Y, Bai Y, Lin X, Zhou Z, Su L, Zhang X. Rational Design of "Three-in-One" Ratiometric Nanoprobes: Protein-Caged Dityrosine, CdS Quantum Dots, and Gold Nanoclusters. ACS OMEGA 2020; 5:8943-8951. [PMID: 32337458 PMCID: PMC7178766 DOI: 10.1021/acsomega.0c00711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Recently, multiplexed ratiometric fluorescence sensors for detecting several analytes have received much interest because of their multifunctionality. Here, we fabricate a novel trinity fluorescent nanoprobe in which one small-molecule fluorophore, blue-emissive dityrosine (diTyr) residues, and two nanomaterial fluorophores, green-emissive CdS quantum dots (CdSQDs) and red-emissive gold nanoclusters (AuNCs), are cocaged in a bovine serum albumin (BSA) molecule. The large differences of Stokes shifts among diTyr residues, CdSQDs, and AuNCs ensure their emission at a single excitation wavelength. The nanoprobes can be facilely integrated using two-step synthetic reactions. DiTyr residues and AuNCs are formed and bound to the protein cage through the redox reaction between Au3+ and tyrosine residues of BSA, and the CdSQDs are followed to be conjugated to the modified BSA cage-templated CdS combination reaction. With established benign biocompatibility, the nanoprobes can ratiometrically detect intracellular glutathione by significantly enhancing the green emission of the conjugated CdSQDs. Likewise, the ratiometric sensing of solution alkalinity and tris(2-carboxyethyl)phosphine can be achieved using blue-emitted diTyr residues and red-emitted AuNCs as the responsive units, respectively, and the corresponding other two fluorophores as the reference signals. This study addresses a concept of trinity fluorescence ratiometric sensing system with multiple targets and optional references, which should be a promising pathway to meet the challenges from complexing biochemical environments and multivariate analysis.
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Affiliation(s)
- Tong Shu
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Yanping Sun
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Yunlong Bai
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Xiangfang Lin
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Ziping Zhou
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Lei Su
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
| | - Xueji Zhang
- Beijing
Key Laboratory for Bioengineering and Sensing Technology, Research
Center for Bioengineering and Sensing Technology, School of Chemistry
and Biological Engineering, University of
Science and Technology Beijing, Beijing 100083, P. R. China
- School
of Biomedical Engineering, Shenzhen University
Health Science Center, Shenzhen, Guangdong 518060, China
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28
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Liu R, Duan S, Bao L, Wu Z, Zhou J, Yu R. Photonic crystal enhanced gold-silver nanoclusters fluorescent sensor for Hg 2+ ion. Anal Chim Acta 2020; 1114:50-57. [PMID: 32359514 DOI: 10.1016/j.aca.2020.04.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 03/01/2020] [Accepted: 04/02/2020] [Indexed: 01/16/2023]
Abstract
Luminescent nanoclusters (NCs) have attracted much attention because of their good photostability and low toxicity, however, the low quantum yield is still a deficiency, and many increasing efforts are being devoted to enhance the luminescence intensity of NCs. In this paper, a method of enhancing the fluorescent signal of gold-silver nanoclusters (AuAgNCs) by photonic crystals (PhCs) was proposed. The fluorescent intensity of AuAgNCs on PhCs can be enhanced 8.0-fold in comparison to the control sample without PhCs. Furthermore, a novel fluorescence sensor of AuAgNCs based on PhCs is used for the sensitive and selective detection of Hg2+ ion in the aqueous solution, the detection limit is 0.35 nM due to the PhCs enhancement effect for the fluorescence. This proposed method may not only develop a highly sensitive method for determination of Hg2+ ion, but also expand the application of AuAgNCs in ultra-trace analysis.
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Affiliation(s)
- Rong Liu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China; Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, PR China
| | - Shanshan Duan
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Lijiao Bao
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Zhaoyang Wu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
| | - Jun Zhou
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Ruqin Yu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
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29
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Zhou Y, Liu J, Zheng T, Tian Y. Label-Free SERS Strategy for In Situ Monitoring and Real-Time Imaging of Aβ Aggregation Process in Live Neurons and Brain Tissues. Anal Chem 2020; 92:5910-5920. [PMID: 32227892 DOI: 10.1021/acs.analchem.9b05837] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The aggregation of Aβ has been reported to closely correlate with Alzheimer's disease (AD). However, clear monitoring of the entire aggregation process of Aβ from monomer to fibril has been scarcely reported until now. Herein, we developed a label-free ratiometric surface enhanced Raman spectroscopic (SERS) platform for real-time monitoring of the entire process of Aβ aggregation in neurons and brain tissues. Different gold nanoparticles, generated in situ with Aβ monomer and fibril as templates separately, were served as effective SERS substrates to achieve a high sensitivity with a limit of detection (LOD) down to 70 ± 4 pM and 3.0 ± 0.5 pM for Aβ40 monomer and fibrils, respectively. Besides, the introduction of ratiometric determination of Aβ monomer and fibril (I1244/I1268) realized real-time monitoring of the entire aggregation process of Aβ monomer with high accuracy and selectivity against other proteins and amino acids. The significant analytical performance of the developed platform, together with good biocompatibility, long-term stability, and remarkable spatial resolution, enabled the present SERS platform imaging and real-time monitoring and imaging of Aβ aggregation influenced by different metal ions (Cu2+, Zn2+, and Fe3+) in neurons and brain tissues at the single cell level. Our results suggested that Cu2+ and Zn2+ ion of low concentration (10 μM) promoted fibril formation, while Fe3+ and Zn2+ of high concentration (100 μM) showed inhibition of fibrosis.
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Affiliation(s)
- Yan Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, P. R. China
| | - Jia Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, P. R. China
| | - Tingting Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, P. R. China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, P. R. China
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30
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Andrýsková P, Šišková KM, Michetschlägerová Š, Jiráková K, Kubala M, Jirák D. The Effect of Fatty Acids and BSA Purity on Synthesis and Properties of Fluorescent Gold Nanoclusters. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E343. [PMID: 32079332 PMCID: PMC7075172 DOI: 10.3390/nano10020343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/31/2020] [Accepted: 02/09/2020] [Indexed: 12/25/2022]
Abstract
Fluorescent gold nanoclusters (AuNCs) are envisaged as a novel type of fluorophores. This work reports on the first comparative study investigating the effect of presence/absence/abundance of fatty acids (namely palmitic acid, PA) or other substances (like glycoproteins and globulins) in the protein (bovine serum albumin, BSA) on synthesis and properties of the final AuNCs. The most popular template (BSA) and microwave (MW)-assisted synthesis of AuNCs have been intentionally chosen. Our results clearly demonstrate that the fluorescent characteristics (i.e., fluorescence lifetime and quantum yield) are affected by the fatty acids and/or other substances. Importantly, the as-prepared AuNCs are biocompatible, as determined by Alamar Blue assay performed on Hep G2 cell line.
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Affiliation(s)
- Pavlína Andrýsková
- Department of Biophysics, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 771 46 Olomouc, Czech Republic;
| | - Karolína Machalová Šišková
- Department of Biophysics, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 771 46 Olomouc, Czech Republic;
| | - Šárka Michetschlägerová
- Department of Science and Research, Faculty of Health Studies, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec, Czech Republic; (Š.M.); (K.J.); (D.J.)
| | - Klára Jiráková
- Department of Science and Research, Faculty of Health Studies, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec, Czech Republic; (Š.M.); (K.J.); (D.J.)
| | - Martin Kubala
- Department of Experimental Physics, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 771 46 Olomouc, Czech Republic;
| | - Daniel Jirák
- Department of Science and Research, Faculty of Health Studies, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec, Czech Republic; (Š.M.); (K.J.); (D.J.)
- Institute for Clinical and Experimental Medicine, Videnska 9, 140 21 Prague, Czech Republic
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31
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Behera S, Behura R, Mohanty M, Dinda R, Mohanty P, Verma AK, Sahoo SK, Jali B. Spectroscopic, cytotoxicity and molecular docking studies on the interaction between 2,4-dinitrophenylhydrazine derived Schiff bases with bovine serum albumin. SENSORS INTERNATIONAL 2020. [DOI: 10.1016/j.sintl.2020.100048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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32
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Liu Z, Jung KO, Takahata R, Sakamoto M, Teranishi T, Fujitsuka M, Pratx G, Osakada Y. Hard X-ray excited optical luminescence from protein-directed Au ∼20 clusters. RSC Adv 2020; 10:13824-13829. [PMID: 35492997 PMCID: PMC9051530 DOI: 10.1039/d0ra01935f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 03/24/2020] [Indexed: 11/21/2022] Open
Abstract
Hard X-ray excited optical luminescence is a unique property of materials, which makes them promising for biological imaging applications. However, the preparation of biocompatible contrast agents for hard X-ray excited optical luminescence remains a considerable challenge that has, to date, not been overcome. In this study, we investigated the luminescence properties of protein-directed Au∼20 clusters upon hard X-ray irradiation, both in solution and when embedded in films. We investigated the luminescence properties of protein-directed Au∼20 clusters upon hard X-ray irradiation, demonstrating the further possible application toward nanomaterial based bio-imaging and diagnostics.![]()
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Affiliation(s)
- Zuoyue Liu
- The Institute of Scientific and Industrial Research (SANKEN)
- Osaka University
- Osaka 567-0047
- Japan
| | - Kyung Oh Jung
- Department of Radiation Oncology and Medical Physics
- Stanford University
- Stanford
- USA
| | - Ryo Takahata
- Institute for Chemical Research
- Kyoto University
- Kyoto 611-0011
- Japan
| | | | | | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN)
- Osaka University
- Osaka 567-0047
- Japan
| | - Guillem Pratx
- Department of Radiation Oncology and Medical Physics
- Stanford University
- Stanford
- USA
| | - Yasuko Osakada
- The Institute of Scientific and Industrial Research (SANKEN)
- Osaka University
- Osaka 567-0047
- Japan
- Institute for Advanced Co-creation Studies
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33
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El‐Sayed N, Trouillet V, Clasen A, Jung G, Hollemeyer K, Schneider M. NIR-Emitting Gold Nanoclusters-Modified Gelatin Nanoparticles as a Bioimaging Agent in Tissue. Adv Healthc Mater 2019; 8:e1900993. [PMID: 31769613 DOI: 10.1002/adhm.201900993] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/09/2019] [Indexed: 12/30/2022]
Abstract
Gold nanocluster (AuNC) synthesis using a well-distinguished polymer for nanoparticle-mediated drug delivery paves the way for developing efficient theranostics based on pharmaceutically accepted materials. Gelatin-stabilized AuNCs are synthesized and modified by glutathione for tuning the emission spectra. Addition of silver ions enhances the fluorescence, reaching also high quantum yield (26.7%). A simplified model can be proposed describing the nanoclusters' properties-structure relationship based on X-ray photoelectron spectroscopy data and synthesis sequence. Furthermore, these modifications improve fluorescence stability toward pH changes and enzymatic degradation, offering different AuNCs for various applications. The impact of nanocluster formation on gelatin structure integrity is investigated by Fourier transform infrared spectrometry and matrix-assisted laser desorption/ionization time of flight mass spectroscopy, being important to further formulate gelatin nanoparticles (GNPs). The 218 nm-sized NPs show no cytotoxicity up to 600 µg mL-1 and are imaged in skin, as a challenging autofluorescent tissue, by confocal microscopy, when transcutaneously delivered using dissolving microneedles. Linear unmixing allows simultaneous imaging of AuNCs-GNPs and skin with accurate signal separation. This underlines the great potential for bioimaging of this system to better understand nanomaterials' behavior in tissue. Additionally, it is drug delivery system also potentially serving as a theranostic system.
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Affiliation(s)
- Nesma El‐Sayed
- Department of PharmacyBiopharmaceutics and Pharmaceutical TechnologySaarland University Campus C4 1 D‐66123 Saarbrücken Germany
- Department of PharmaceuticsFaculty of PharmacyAlexandria University 21521 Alexandria Egypt
| | - Vanessa Trouillet
- Institute for Applied Materials (IAM) and Karlsruhe Nano Micro Facility (KNMF)Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Anne Clasen
- Department of Biophysical ChemistrySaarland University Campus B2 2 D‐66123 Saarbrücken Germany
| | - Gregor Jung
- Department of Biophysical ChemistrySaarland University Campus B2 2 D‐66123 Saarbrücken Germany
| | - Klaus Hollemeyer
- Physical Chemistry and Didactics of ChemistrySaarland University Campus B2 2 D‐66123 Saarbrücken Germany
| | - Marc Schneider
- Department of PharmacyBiopharmaceutics and Pharmaceutical TechnologySaarland University Campus C4 1 D‐66123 Saarbrücken Germany
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34
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Insights into the binding mechanism of a model protein with fomesafen: Spectroscopic studies, thermodynamics and molecular modeling exploration. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.128] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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35
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Chen J, Wu W, Huang L, Ma Q, Dong S. Self‐Indicative Gold Nanozyme for H
2
O
2
and Glucose Sensing. Chemistry 2019; 25:11940-11944. [DOI: 10.1002/chem.201902288] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/07/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Jinxing Chen
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 P.R. China
- University of Science and Technology of China Hefei Anhui 230026 P.R. China
| | - Weiwei Wu
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 P.R. China
- University of Science and Technology of China Hefei Anhui 230026 P.R. China
| | - Liang Huang
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 P.R. China
- University of Science and Technology of China Hefei Anhui 230026 P.R. China
| | - Qian Ma
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 P.R. China
- University of Science and Technology of China Hefei Anhui 230026 P.R. China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 P.R. China
- University of Science and Technology of China Hefei Anhui 230026 P.R. China
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36
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Luo D, Wang X, Zeng S, Ramamurthy G, Burda C, Basilion JP. Targeted Gold Nanocluster-Enhanced Radiotherapy of Prostate Cancer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900968. [PMID: 31265213 PMCID: PMC6707872 DOI: 10.1002/smll.201900968] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/14/2019] [Indexed: 05/02/2023]
Abstract
For over a hundred years, X-rays have been a main component of the radiotherapeutic approaches to treat cancer. Yet, to date, no radiosensitizer has been developed to selectively target prostate cancer. Gold has excellent X-ray absorptivity and is used as a radiotherapy enhancing material. In this work, ultrasmall Au25 nanoclusters (NCs) are developed for selective prostate cancer targeting, radiotherapy enhancement, and rapid clearance from the body. Targeted-Au25 NCs are rapidly and selectively taken up by prostate cancer in vitro and in vivo and also have fast renal clearance. When combined with X-ray irradiation of the targeted cancer tissues, radiotherapy is significantly enhanced. The selective targeting and rapid clearance of the nanoclusters may allow reductions in radiation dose, decreasing exposure to healthy tissue and making them highly attractive for clinical translation.
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Affiliation(s)
- Dong Luo
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Xinning Wang
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sophia Zeng
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Chemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | | | - Clemens Burda
- Department of Chemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - James P Basilion
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
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37
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Xu HV, Zhao Y, Tan YN. Nanodot-Directed Formation of Plasmonic-Fluorescent Nanohybrids toward Dual Optical Detection of Glucose and Cholesterol via Hydrogen Peroxide Sensing. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27233-27242. [PMID: 31282641 DOI: 10.1021/acsami.9b08708] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Hybrid nanoparticles (NPs) have emerged as an important class of nanomaterials owing to their integrated enhanced properties and functionality. In this study, we have developed an effective nanodot templating strategy for the in situ formation of surfactant-free nanohybrids with unique plasmonic-fluorescent properties. A bright photoluminescent biodot synthesized from serine and histamine biomolecular precursors (Ser-Hist dot) was first engineered to have rich functional groups on the nanosurface capable of anchoring Ag+ ions via electrostatic interaction. Upon UV irradiation, free electrons could transfer from the photoexcited Ser-Hist dot to the Ag+ ions, facilitating the in situ growth of AgNPs. The resulting nanohybrid system (Bio@AgNPs) exhibits distinct characteristic surface plasmon resonance absorbance and highly quenched PL intensity due to the inner filter effect. Furthermore, the Bio@AgNP nanohybrid retains its redox capability, enabling hydrogen peroxide sensing via AgNP etching, which in turn empowers a dual colorimetric and fluorescent detection of glucose and cholesterol in complex biological samples (i.e., synthetic urine and human plasma) with high selectivity and sensitivity. This finding reveals a new effective and facile method for the preparation of highly functional hybrid nanomaterials for dual-mode detection of hydrogen peroxide-producing species and/or reactions.
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Affiliation(s)
- Hesheng Victor Xu
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR) , 2 Fusionopolis Way , Singapore 138634 , Singapore
- Division of Chemical and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Yanli Zhao
- Division of Chemical and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Yen Nee Tan
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR) , 2 Fusionopolis Way , Singapore 138634 , Singapore
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 , Singapore
- Faculty of Science, Agriculture & Engineering , Newcastle University , Newcastle upon Tyne NE1 7RU , U.K
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38
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Kluz M, Nieznańska H, Dec R, Dzięcielewski I, Niżyński B, Ścibisz G, Puławski W, Staszczak G, Klein E, Smalc-Koziorowska J, Dzwolak W. Revisiting the conformational state of albumin conjugated to gold nanoclusters: A self-assembly pathway to giant superstructures unraveled. PLoS One 2019; 14:e0218975. [PMID: 31247048 PMCID: PMC6597083 DOI: 10.1371/journal.pone.0218975] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/12/2019] [Indexed: 11/21/2022] Open
Abstract
Bovine serum albumin (BSA) is often employed as a proteinaceous component for synthesis of luminescent protein-stabilized gold nanoclusters (AuNC): intriguing systems with many potential applications. Typically, the formation of BSA-AuNC conjugate occurs under strongly alkaline conditions. Due to the sheer complexity of intertwined chemical and structural transitions taking place upon BSA-AuNC formation, the state of albumin enveloping AuNCs remains poorly characterized. Here, we study the conformational properties of BSA bound to AuNCs using an array of biophysical tools including vibrational spectroscopy, circular dichroism, fluorescence spectroscopy and trypsin digestion. The alkaline conditions of BSA-AuNC self-assembly appear to be primary responsible for the profound irreversible disruption of tertiary contacts, partial unfolding of native α-helices, hydrolysis of disulfide bonds and the protein becoming vulnerable to trypsin digestion. Further unfolding of BSA-AuNC by guanidinium hydrochloride (GdnHCl) is fully reversible equally in terms of albumin's secondary structure and conjugate's luminescent properties. This suggests that binding to AuNCs traps the albumin molecule in a state that is both partly disordered and refractory to irreversible misfolding. Indeed, when BSA-AuNC is subjected to conditions favoring self-association of BSA into amyloid-like fibrils, the buildup of non-native β-sheet conformation is less pronounced than in a control experiment with unmodified BSA. Unexpectedly, BSA-AuNC reveals a tendency to self-assemble into giant twisted superstructures of micrometer lengths detectable with transmission electron microscopy (TEM), a property absent in unmodified BSA. The process is accompanied by ordering of bound AuNCs into elongated streaks and simultaneous decrease in fluorescence intensity. The newly discovered self-association pathway appears to be specifically accessible to protein molecules with a certain restriction on structural dynamics which in the case of BSA-AuNC arises from binding to metal nanoclusters. Our results have been discussed in the context of mechanisms of protein misfolding and applications of BSA-AuNC.
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MESH Headings
- Amino Acid Sequence
- Animals
- Cattle
- Circular Dichroism
- Gold/chemistry
- Metal Nanoparticles/chemistry
- Metal Nanoparticles/ultrastructure
- Microscopy, Atomic Force
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Models, Molecular
- Protein Aggregates
- Protein Conformation
- Protein Denaturation
- Protein Stability
- Serum Albumin, Bovine/chemistry
- Serum Albumin, Bovine/genetics
- Serum Albumin, Bovine/ultrastructure
- Spectrometry, Fluorescence
- Spectroscopy, Fourier Transform Infrared
- Spectrum Analysis, Raman
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Affiliation(s)
- Michał Kluz
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Hanna Nieznańska
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Robert Dec
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Igor Dzięcielewski
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Bartosz Niżyński
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Grzegorz Ścibisz
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Wojciech Puławski
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Grzegorz Staszczak
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Ewelina Klein
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | | | - Wojciech Dzwolak
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
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39
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Dehvari K, Li JD, Chang JY. Bovine Serum Albumin-Templated Synthesis of Manganese-Doped Copper Selenide Nanoparticles for Boosting Targeted Delivery and Synergistic Photothermal and Photodynamic Therapy. ACS APPLIED BIO MATERIALS 2019; 2:3019-3029. [DOI: 10.1021/acsabm.9b00339] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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40
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Hsu YC, Hung MJ, Chen YA, Wang TF, Ou YR, Chen SH. Identifying Reducing and Capping Sites of Protein-Encapsulated Gold Nanoclusters. Molecules 2019; 24:molecules24081630. [PMID: 31027193 PMCID: PMC6514900 DOI: 10.3390/molecules24081630] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/19/2019] [Accepted: 04/22/2019] [Indexed: 11/28/2022] Open
Abstract
The reducing and capping sites along with their local structure impact photo properties of the red bovine serum albumin-capped Au nanocluster (BSA-AuNC), however, they are hard to identify. We developped a workflow and relevant techniques using mass spectrometry (MS) to identify the reducing and capping sites of BSA-AuNCs involved in their formation and fluorescence. Digestion without disulfide cleavages yielded an Au core fraction exhibiting red fluorescence and [AunSm] ion signals and a non-core fraction exhibiting neither of them. The core fraction was identified to mainly be comprised of peptides containing cysteine residues. The fluorescence and [AunSm] signals were quenched by tris(2-carboxyethyl)phosphine, confirming that disulfide groups were required for nanocluster stabilization and fluorescence. By MS sequencing, the disulfide pairs, C75–C91/C90–C101 in domain IA, C315–C360/C359–C368 in domain IIB, and C513–C558/C557–C566 in domain IIIB, were identified to be main capping sites of red AuNCs. Peptides containing oxidized cysteines (sulfinic or cysteic acid) were identified as reducing sites mainly in the non-core fraction, suggesting that disulfide cleavages by oxidization and conformational changes contributed to the subsequent growth of nanoclusters at nearby intact disulfide pairs. This is the first report on precise identification of the reducing and capping sites of BSA-AuNCs.
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Affiliation(s)
- Yu-Chen Hsu
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Mei-Jou Hung
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Yi-An Chen
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Tsu-Fan Wang
- Department of Applied Chemistry, National Chia-Yi University, Chia-Yi 60004, Taiwan.
| | - Ying-Ru Ou
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Shu-Hui Chen
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan.
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41
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Islam MM, Barik S, Sarkar M. Probing the Interactions of 1-Alkyl-3-methylimidazolium Tetrafluoroborate (Alkyl = Octyl, Hexyl, Butyl, and Ethyl) Ionic Liquids with Bovine Serum Albumin: An Alkyl Chain Length-Dependent Study. J Phys Chem B 2019; 123:1512-1526. [DOI: 10.1021/acs.jpcb.8b10795] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mullah Muhaiminul Islam
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
| | - Sahadev Barik
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
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42
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Zheng Z, Li H, Sun S, Xu Y. Media Dependent Switching of Selectivity and Continuous near Infrared Turn-on Fluorescence Response through Cascade Interactions from Noncovalent to Covalent Binding for Detection of Serum Albumin in Living Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44336-44343. [PMID: 30514088 DOI: 10.1021/acsami.8b19768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Abnormal level of proteins is proved to be associated with diseases. Thus, protein sensing is helpful for clinical diagnosis and therapy. However, there is a great variety of protein species and relatively low concentration of each protein in complicated biological systems including other nonprotein biomolecules. Therefore, it remains challenging to develop an effective method for detecting protein with high selectivity and sensitivity. Herein, a new self-assembly method based on a robust dye SQSS of which two squaraine molecules were conjugated through disulfide bond was developed for highly selective and sensitive detection of serum albumin (SA) in aqueous solution and live cells. SQSS can self-assemble into "compact" aggregates, offering "inert" disulfide group and very low background fluorescence through the combination of aggregation quenching and homogeneous fluorescence resonance energy transfer (homoFRET) quenching. The response of SQSS to SA undergoes two cascade stages. At the first stage, SA drives the compact assemblies of SQSS to form loose ones with fast speed (30 s) through noncovalent interaction, resulting in the enhancement of fluorescence to some extent. In this loose assembly state, the disulfide bond in SQSS is reactive. At the second stage, the Cys34 in SA slowly induced further disassembly through covalent binding with reactive disulfide bond, resulting in fluorescence further increasing and SQSS labeling to SA that cannot be displaced by site binding ligands of SA. The self-assemblies of SQSS can selectively detect SA with continuous near-infrared (NIR) turn-on fluorescence response in 100% aqueous buffer solution. In addition, SQSS showed the potential application of imaging SA in living cells. On the other hand, the loose assembly state of SQSS was also achieved in aqueous solution with 20% CH3CN. In this media, thiol-containing glutathione (GSH) caused the disassembly of SQSS with turn-on fluorescence response through interaction with disulfide bond. SQSS can selectively recognize GSH over other amino acids even in the presence of other sulfhydryl amino acids. As a proof-of-concept method, the molecular self-assembly through multisteps interactions would provide an ideal strategy for detection and live-cell imaging of biorelated molecules with high selectivity and signal-to-noise ratio.
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Affiliation(s)
- Ziming Zheng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Hongjuan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Shiguo Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Yongqian Xu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
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43
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Hua XW, Bao YW, Zeng J, Wu FG. Ultrasmall All-In-One Nanodots Formed via Carbon Dot-Mediated and Albumin-Based Synthesis: Multimodal Imaging-Guided and Mild Laser-Enhanced Cancer Therapy. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42077-42087. [PMID: 30403472 DOI: 10.1021/acsami.8b16065] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Integration of multiple diagnostic/therapeutic modalities into a single system with ultrasmall size, excellent photothermal/photodynamic properties, high cellular uptake efficiency, nuclear delivery capacity, rapid renal clearance, and good biosafety is highly desirable for cancer theranostics, but still remains challenging. Here, a novel type of multifunctional nanodots (denoted as BCCGH) was synthesized by mixing bovine serum albumin, carbon dots, and metal ions (Cu2+ and Gd3+), followed by the conjugation with a photosensitizer (HPPH). The nanodots hold great promise for fluorescence/photoacoustic/magnetic resonance/photothermal imaging-guided synergistic photothermal/photodynamic therapy (PDT) because of their appealing properties such as high photothermal conversion efficiency (68.4%), high longitudinal relaxivity (11.84 mM-1 s-1, 7 T), and superior colloidal stability with negligible Gd3+ release. Benefiting from the massive cellular uptake, endoplasmic reticulum/mitochondrion-targeting ability, and mild near-infrared laser irradiation-promoted nuclear delivery of BCCGH, a high anticancer therapeutic efficiency is achieved in the subsequent in vitro PDT. Besides, as revealed by the in vivo/ex vivo results, the nanodots also exhibit excellent tumor accumulation, efficient renal clearance, complete tumor ablation, and exceptional biosafety. To summarize, this work develops a carbon dot-mediated and albumin-based synthetic approach for constructing ultrasmall and multifunctional nanodots, which may hold great potential for cancer theranostics and beyond.
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Affiliation(s)
- Xian-Wu Hua
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , 2 Sipailou Road , Nanjing 210096 , P. R. China
| | - Yan-Wen Bao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , 2 Sipailou Road , Nanjing 210096 , P. R. China
| | - Jia Zeng
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , 2 Sipailou Road , Nanjing 210096 , P. R. China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , 2 Sipailou Road , Nanjing 210096 , P. R. China
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44
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Dixon JM, Egusa S. Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III). J Vis Exp 2018. [PMID: 30222150 DOI: 10.3791/58141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The purpose of the presented protocols is to study the process of Au(III) binding to BSA, yielding conformation change-induced red fluorescence (λem = 640 nm) of BSA-Au(III) complexes. The method adjusts the pH to show that the emergence of the red fluorescence is correlated with the pH-induced equilibrium transitions of the BSA conformations. Red fluorescent BSA-Au(III) complexes can only be formed with an adjustment of pH at or above 9.7, which corresponds to the "A-form" conformation of BSA. The protocol to adjust the BSA to Au molar ratio and to monitor the time-course of the process of Au(III) binding is described. The minimum number of Au(III) per BSA, to produce the red fluorescence, is less than seven. We describe the protocol in steps to illustrate the presence of multiple Au(III) binding sites in BSA. First, by adding copper (Cu(II)) or nickel (Ni(II)) cations followed by Au(III), this method reveals a binding site for Au(III) that is not the red fluorophore. Second, by modifying BSA by thiol capping agents, another nonfluorophore-forming Au(III) binding site is revealed. Third, changing the BSA conformation by cleaving and capping of the disulfide bonds, the possible Au(III) binding site(s) are illustrated. The protocol described, to control the BSA conformations and Au(III) binding, can be generally applied to study the interactions of other proteins and metal cations.
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Affiliation(s)
- Jacob M Dixon
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, University of North Carolina
| | - Shunji Egusa
- Department of Physics and Optical Science, Center for Biomedical Engineering & Science, University of North Carolina;
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45
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Carnerero JM, Masuoka S, Baba H, Yoshikawa Y, Prado-Gotor R, Yoshikawa K. Decorating a single giant DNA with gold nanoparticles. RSC Adv 2018; 8:26571-26579. [PMID: 35541036 PMCID: PMC9083275 DOI: 10.1039/c8ra05088k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 07/18/2018] [Indexed: 11/21/2022] Open
Abstract
We decorated a single giant DNA (1.66 × 105 base pairs) with gold nanoparticles through the simple procedure of mild warming, without denaturation of the DNA molecule. Single-molecule observation with fluorescence microscopy revealed that individual decorated DNA molecules stay in the bulk solution by avoiding aggregation and precipitation, and exhibit translational and conformational fluctuation, i.e., Brownian motion. An analysis of the intra-chain fluctuation of single DNA molecules revealed that the apparent spring constant and damping coefficient of a DNA chain increased by ca. 13- and 5-fold, respectively, upon decoration with gold nanoparticles. Observation by transmission electron microscopy revealed that gold nanoparticles were stably attached to the DNA skeleton. UV-visible measurements revealed the absence of any detectable change in surface plasmon resonance, suggesting that the gold nanoparticles assemble without the formation of a densely packed aggregate. CD measurements showed that the secondary structure of decorated DNA is still essentially the B-form. We decorated a single giant DNA (1.66 × 105 base pairs) with gold nanoparticles through the simple procedure of mild warming, without denaturation of the DNA molecule.![]()
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Affiliation(s)
- Jose M. Carnerero
- Department of Physical Chemistry
- Faculty of Chemistry
- Universidad de Sevilla
- Seville
- Spain
| | - Shinsuke Masuoka
- Faculty of Life and Medical Sciences
- Doshisha University
- Kyotanabe 610-0394
- Japan
| | - Hikari Baba
- Faculty of Life and Medical Sciences
- Doshisha University
- Kyotanabe 610-0394
- Japan
| | - Yuko Yoshikawa
- Faculty of Life and Medical Sciences
- Doshisha University
- Kyotanabe 610-0394
- Japan
| | - Rafael Prado-Gotor
- Department of Physical Chemistry
- Faculty of Chemistry
- Universidad de Sevilla
- Seville
- Spain
| | - Kenichi Yoshikawa
- Faculty of Life and Medical Sciences
- Doshisha University
- Kyotanabe 610-0394
- Japan
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