1
|
Tateo S, Shinchi H, Matsumoto H, Nagata N, Hashimoto M, Wakao M, Suda Y. Optimized immobilization of single chain variable fragment antibody onto non-toxic fluorescent nanoparticles for efficient preparation of a bioprobe. Colloids Surf B Biointerfaces 2023; 224:113192. [PMID: 36791518 DOI: 10.1016/j.colsurfb.2023.113192] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/27/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
Single-chain variable fragment antibody (scFv) is a small molecular weight antibody that can be used for both therapeutic and diagnostic purposes. To visualize the interaction with the target biomolecules, scFv must be labeled with fluorescent molecules. In this study, to achieve the efficient labeling of scFv, we developed scFv-fluorescent nanoparticle conjugates to utilize scFv as bioprobes. As fluorescent carriers, cadmium-free ZnS-AgInS2/ZnS core/shell nanoparticles were used, and scFv was immobilized onto the nanoparticles via the interaction of nickel ions on nitrilotriacetic acid and hexahistidine (His-tag) fused with scFv. UV-Vis, fluorescence spectra, NMR, and dynamic laser scattering were used to characterize the scFv immobilized fluorescent nanoparticles (scFv-FNPs). The amounts of scFv on FNPs were controlled by the concentration of scFv. The scFv-FNPs that were prepared were non-toxic and selectively bound to cancer cells. The scFv-FNPs could be used as bioanalytical tools, and the immobilization method described here is a promising method for labeling biomolecules with the His-tag.
Collapse
Affiliation(s)
- Seigo Tateo
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Hiroyuki Shinchi
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Hikaru Matsumoto
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Nonoka Nagata
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Masahito Hashimoto
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Masahiro Wakao
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Yasuo Suda
- Department of Engineering, Chemistry and Biotechnology Program, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| |
Collapse
|
2
|
Shinchi H, Yuki M, Yamauchi T, Niimura M, Wakao M, Cottam HB, Hayashi T, Carson DA, Moroishi T, Suda Y. Glyco-Nanoadjuvants: Sugar Structures on Carriers of a Small Molecule TLR7 Ligand Affect Their Immunostimulatory Activities. ACS APPLIED BIO MATERIALS 2021; 4:2732-2741. [PMID: 35014312 DOI: 10.1021/acsabm.0c01639] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Toll-like receptors (TLRs) are pattern recognition receptors that activate innate immunity, and their ligands are promising adjuvants for vaccines and immunotherapies. Small molecule TLR7 ligands are ideal vaccine adjuvants as they induce not only proinflammatory cytokines but also type I interferons. However, their application has only been approved for local administration due to severe systemic immune-related adverse events. In a previous study, we prepared the gold nanoparticles coimmobilized with synthetic small molecule TLR7 ligand, 1V209, and α-mannose (1V209-αMan-GNPs). 1V209-αMan-GNPs were selectively delivered via a cell surface sugar-binding protein, mannose receptor, which enabled selective delivery of TLR7 ligands to immune cells. Besides the mannose receptor, immune cells express various sugar-binding proteins such as macrophage galactose binding lectins and sialic acid-binding immunoglobulin-type lectins and recognize distinct sugar structures. Hence, in the present study, we investigated whether sugar structures on GNPs affect the efficiency and selectivity of intracellular delivery and subsequent immunostimulatory potencies. Five neutral sugars and two sialosides were selected and each sugar was coimmobilized with 1V209 onto GNPs (1V209-SGNPs) and their innate immunostimulatory potencies were compared to that of 1V209-αMan-GNPs. The in vitro study using mouse bone marrow derived dendritic cells (BMDCs) demonstrated that α-glucose, α-N-acetylglucosamine, or α-fucose immobilized 1V209-SGNPs increased interleukin-6 and type I interferon release similar to that of 1V209-αMan-GNPs, whereas galacto-type sugar immobilized 1V209-SGNPs predominantly enhanced type I interferon release. In contrast, sialoside immobilized 1V209-SGNPs did not enhance the potency of 1V209. In the in vivo immunization study using ovalbumin as a model antigen, neutral sugar immobilized 1V209-SGNPs induced comparable T helper-1 immune response to that of 1V209-αMan-GNPs and by 10-fold higher than that of sialoside immobilized 1V209-SGNPs. These results indicate that the sugar structures on 1V209-SGNPs affect their immunostimulatory activities, and functionalization of the carrier particles is important to shape immune responses.
Collapse
Affiliation(s)
- Hiroyuki Shinchi
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Masaharu Yuki
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Takayoshi Yamauchi
- Department of Cell Signaling and Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Mayumi Niimura
- Department of Cell Signaling and Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Masahiro Wakao
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Howard B Cottam
- Moores Cancer Center, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0809, United States
| | - Tomoko Hayashi
- Moores Cancer Center, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0809, United States
| | - Dennis A Carson
- Moores Cancer Center, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0809, United States
| | - Toshiro Moroishi
- Department of Cell Signaling and Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Center for Metabolic Regulation of Healthy Aging (CMHA), Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi 332-0012, Japan
| | - Yasuo Suda
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.,SUDx-Biotec Corporation, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| |
Collapse
|
3
|
Shinchi H, Yamaguchi T, Moroishi T, Yuki M, Wakao M, Cottam HB, Hayashi T, Carson DA, Suda Y. Gold Nanoparticles Coimmobilized with Small Molecule Toll-Like Receptor 7 Ligand and α-Mannose as Adjuvants. Bioconjug Chem 2019; 30:2811-2821. [PMID: 31560198 DOI: 10.1021/acs.bioconjchem.9b00560] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Adjuvants enhance the immune response during vaccination. Among FDA-approved adjuvants, aluminum salts are most commonly used in vaccines. Although aluminum salts enhance humoral immunity, they show a limited effect for cell-mediated immune responses. Thus, further development of adjuvants that induce T-cell-mediated immune response is needed. Toll-like receptors (TLRs) recognizing specific pathogen-associated molecular patterns activate innate immunity, which is crucial to shape adaptive immunity. Using TLR ligands as novel adjuvants in vaccines has therefore attracted substantial attention. Among them a small molecule TLR7 ligand, imiquimod, has been approved for clinical use, but its use is restricted to local administration due to unwanted adverse side effects when used systematically. Since TLR7 is mainly located in the endosomal compartment of immune cells, efficient transport of the ligand into the cells is important for improving the potency of the TLR7 ligand. In this study we examined gold nanoparticles (GNPs) immobilized with α-mannose as carriers for a TLR7 ligand to target immune cells. The small molecule synthetic TLR7 ligand, 2-methoxyethoxy-8-oxo-9-(4-carboxy benzyl)adenine (1V209), and α-mannose were coimmobilized via linker molecules consisting of thioctic acid on the GNP surface (1V209-αMan-GNPs). The in vitro cytokine production activity of 1V209-αMan-GNPs was higher than that of the unconjugated 1V209 derivative in mouse bone marrow-derived dendritic cells and in human peripheral blood mononuclear cells. In the in vivo immunization study, 1V209-αMan-GNPs induced significantly higher titers of IgG2c antibody specific to ovalbumin as an antigen than did unconjugated 1V209, and splenomegaly and weight loss were not observed. These results indicate that 1V209-αMan-GNPs could be useful as safe and effective adjuvants for development of vaccines against infectious diseases and cancer.
Collapse
Affiliation(s)
- Hiroyuki Shinchi
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering , Kagoshima University , 1-21-40 Korimoto , Kagoshima 890-0065 , Japan
| | - Toru Yamaguchi
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering , Kagoshima University , 1-21-40 Korimoto , Kagoshima 890-0065 , Japan
| | - Toshiro Moroishi
- Department of Molecular Enzymology, Faculty of Life Sciences , Kumamoto University , 1-1-1 Honjo, Chuo-ku , Kumamoto 860-8556 , Japan.,Center for Metabolic Regulation of Healthy Aging, Faculty of Life Sciences , Kumamoto University , Kumamoto 860-8556 , Japan.,Precursory Research for Embryonic Science and Technology (PRESTO) , Japan Science and Technology Agency (JST) , Kawaguchi 332-0012 , Japan
| | - Masaharu Yuki
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering , Kagoshima University , 1-21-40 Korimoto , Kagoshima 890-0065 , Japan
| | - Masahiro Wakao
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering , Kagoshima University , 1-21-40 Korimoto , Kagoshima 890-0065 , Japan
| | - Howard B Cottam
- Moores Cancer Center , University of California San Diego , 9500 Gilman Drive , La Jolla , California 92093-0695 , United States
| | - Tomoko Hayashi
- Moores Cancer Center , University of California San Diego , 9500 Gilman Drive , La Jolla , California 92093-0695 , United States
| | - Dennis A Carson
- Moores Cancer Center , University of California San Diego , 9500 Gilman Drive , La Jolla , California 92093-0695 , United States
| | - Yasuo Suda
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering , Kagoshima University , 1-21-40 Korimoto , Kagoshima 890-0065 , Japan.,SUDx-Biotec Corporation , 1-42-1 Shiroyama , Kagoshima 890-0013 , Japan
| |
Collapse
|
4
|
Abstract
Abstract
Despite all major breakthroughs in recent years of research, we are still unsuccessful to effectively diagnose and treat cancer that has express and metastasizes. Thus, the development of a novel approach for cancer detection and treatment is crucial. Recent progress in Glyconanotechnology has allowed the use of glycans and lectins as bio-functional molecules for many biological and biomedical applications. With the known advantages of quantum dots (QDs) and versatility of carbohydrates and lectins, Glyco-functionalised QD is a new prospect in constructing biomedical imaging platform for cancer behaviour study as well as treatment. In this review, we aim to describe the current utilisation of Glyco-functionalised QDs as well as their future prospective to interpret and confront cancer.
Collapse
|
5
|
Shinchi H, Nakamura T, Ota H, Nishihara S, Wakao M, Suda Y. Cell Profiling Based on Sugar‐Chain–Cell Binding Interaction and Its Application to Typing and Quality Verification of Cells. Chembiochem 2019; 20:1810-1816. [DOI: 10.1002/cbic.201900028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Hiroyuki Shinchi
- Graduate School of Science and Engineering Kagoshima University 1-21-40 Kohrimoto Kagoshima 890-0065 Japan
| | - Tomoya Nakamura
- Graduate School of Science and Engineering Kagoshima University 1-21-40 Kohrimoto Kagoshima 890-0065 Japan
| | - Hayato Ota
- Graduate School of Engineering Soka University, 1-236 Tangi-machi Hachioji Tokyo 192-8577 Japan
| | - Shoko Nishihara
- Graduate School of Engineering Soka University, 1-236 Tangi-machi Hachioji Tokyo 192-8577 Japan
| | - Masahiro Wakao
- Graduate School of Science and Engineering Kagoshima University 1-21-40 Kohrimoto Kagoshima 890-0065 Japan
| | - Yasuo Suda
- Graduate School of Science and Engineering Kagoshima University 1-21-40 Kohrimoto Kagoshima 890-0065 Japan
- SUDx-Biotec Corporation 1-42-1 Shiroyama Kagoshima 890-0013 Japan
| |
Collapse
|
6
|
Cunha C, Oliveira A, Firmino T, Tenório D, Pereira G, Carvalho L, Santos B, Correia M, Fontes A. Biomedical applications of glyconanoparticles based on quantum dots. Biochim Biophys Acta Gen Subj 2018; 1862:427-439. [DOI: 10.1016/j.bbagen.2017.11.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 11/01/2017] [Accepted: 11/05/2017] [Indexed: 01/07/2023]
|
7
|
Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2011-2012. MASS SPECTROMETRY REVIEWS 2017; 36:255-422. [PMID: 26270629 DOI: 10.1002/mas.21471] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
This review is the seventh update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2012. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, and fragmentation are covered in the first part of the review and applications to various structural types constitute the remainder. The main groups of compound are oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2015 Wiley Periodicals, Inc. Mass Spec Rev 36:255-422, 2017.
Collapse
Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford, OX1 3QU, UK
| |
Collapse
|
8
|
Shinchi H, Yuki N, Ishida H, Hirata K, Wakao M, Suda Y. Visual Detection of Human Antibodies Using Sugar Chain-Immobilized Fluorescent Nanoparticles: Application as a Point of Care Diagnostic Tool for Guillain-Barré Syndrome. PLoS One 2015; 10:e0137966. [PMID: 26378448 PMCID: PMC4574945 DOI: 10.1371/journal.pone.0137966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 08/25/2015] [Indexed: 11/18/2022] Open
Abstract
Sugar chain binding antibodies have gained substantial attention as biomarkers due to their crucial roles in various disorders. In this study, we developed simple and quick detection method of anti-sugar chain antibodies in sera using our previously developed sugar chain-immobilized fluorescent nanoparticles (SFNPs) for the point-of-care diagnostics. Sugar chain structure on SFNPs was modified with the sugar moieties of the GM1 ganglioside via our original linker molecule to detect anti-GM1 antibodies. The structures and densities of the sugar moieties immobilized on the nanoparticles were evaluated in detail using lectins and sera containing anti-GM1 antibodies from patients with Guillain-Barré syndrome, a neurological disorder, as an example of disease involving anti-sugar chain antibodies. When optimized SFNPs were added to sera from patients with Guillain-Barré syndrome, fluorescent aggregates were able to visually detect under UV light in three hours. The sensitivity of the detection method was equivalent to that of the current ELISA method used for the diagnosis of Guillain-Barré syndrome. These results suggest that our method using SFNPs is suitable for the point-of-care diagnostics of diseases involving anti-sugar chain antibodies.
Collapse
Affiliation(s)
- Hiroyuki Shinchi
- Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima 890–0065, Japan
| | - Nobuhiro Yuki
- Department of Neurology, Dokkyo Medical University, Tochigi 321–0293, Japan
- Brain & Mind Research Institute, University of Sydney, Level 7, Building F, 94 Mallett Street, Camperdown, NSW 2050, Australia
| | - Hideharu Ishida
- Department of Applied Bioorganic Chemistry, Gifu University, Gifu 501–1193, Japan
| | - Koichi Hirata
- Department of Neurology, Dokkyo Medical University, Tochigi 321–0293, Japan
| | - Masahiro Wakao
- Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima 890–0065, Japan
| | - Yasuo Suda
- Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima 890–0065, Japan
- SUDx-Biotec Corporation, 1-42-1 Shiroyama, Kagoshima 890–0013, Japan
- * E-mail:
| |
Collapse
|
9
|
Conde J, Dias JT, Grazú V, Moros M, Baptista PV, de la Fuente JM. Revisiting 30 years of biofunctionalization and surface chemistry of inorganic nanoparticles for nanomedicine. Front Chem 2014; 2:48. [PMID: 25077142 PMCID: PMC4097105 DOI: 10.3389/fchem.2014.00048] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/24/2014] [Indexed: 01/04/2023] Open
Abstract
In the last 30 years we have assisted to a massive advance of nanomaterials in material science. Nanomaterials and structures, in addition to their small size, have properties that differ from those of larger bulk materials, making them ideal for a host of novel applications. The spread of nanotechnology in the last years has been due to the improvement of synthesis and characterization methods on the nanoscale, a field rich in new physical phenomena and synthetic opportunities. In fact, the development of functional nanoparticles has progressed exponentially over the past two decades. This work aims to extensively review 30 years of different strategies of surface modification and functionalization of noble metal (gold) nanoparticles, magnetic nanocrystals and semiconductor nanoparticles, such as quantum dots. The aim of this review is not only to provide in-depth insights into the different biofunctionalization and characterization methods, but also to give an overview of possibilities and limitations of the available nanoparticles.
Collapse
Affiliation(s)
- João Conde
- Harvard-MIT Division for Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of TechnologyCambridge, MA, USA
| | - Jorge T. Dias
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Valeria Grazú
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Maria Moros
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Pedro V. Baptista
- CIGMH, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaCaparica, Portugal
| | - Jesus M. de la Fuente
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
- Fundacion ARAIDZaragoza, Spain
- Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Bio-Nano Science and Engineering, Institute of Nano Biomedicine and Engineering, Research Institute of Translation Medicine, Shanghai Jiao Tong UniversityShanghai, China
| |
Collapse
|
10
|
Ma W, Liu HT, He XP, Zang Y, Li J, Chen GR, Tian H, Long YT. Target-specific imaging of transmembrane receptors using quinonyl glycosides functionalized quantum dots. Anal Chem 2014; 86:5502-7. [PMID: 24803208 DOI: 10.1021/ac501463u] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Here, we describe a novel "switch-on" biosensor based on quinonyl glycosides functionalized quantum dots (QDs) for the specific targeting and imaging of transmembrane glycoprotein receptors on the surface of cancer cells. The design of the quinonyl glycosides lies in that the quinone moiety serves as a quencher of QDs and the glycoside moiety as a biospecific ligand for targeting a receptor. We observed that the quenched photoluminescence of the quinone glycosides functionalized QDs could be significantly recovered by a specific lectin that selectively binds to the glycosides clustering the QDs but was not affected by a panel of nonspecific lectins. Moreover, we determined that quinonyl galactoside functionalized QDs could optically image the asialoglycoprotein receptors of a hepatoma cell line in a target-specific manner. This system might provide new insights into the fabrication of photoluminogenic biosensors for the analysis of the universal ligand-receptor recognitions in nature.
Collapse
Affiliation(s)
- Wei Ma
- Key Laboratory for Advanced Materials & Institute of Fine Chemicals, East China University of Science and Technology , Shanghai, P. R. China
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Shinchi H, Wakao M, Nagata N, Sakamoto M, Mochizuki E, Uematsu T, Kuwabata S, Suda Y. Cadmium-free sugar-chain-immobilized fluorescent nanoparticles containing low-toxicity ZnS-AgInS2 cores for probing lectin and cells. Bioconjug Chem 2014; 25:286-95. [PMID: 24437371 DOI: 10.1021/bc400425w] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Sugar chains play a significant role in various biological processes through sugar chain-protein and sugar chain-sugar chain interactions. To date, various tools for analyzing sugar chains biofunctions have been developed. Fluorescent nanoparticles (FNPs) functionalized with carbohydrate, such as quantum dots (QDs), are an attractive imaging tool for analyzing carbohydrate biofunctions in vitro and in vivo. Most FNPs, however, consist of highly toxic elements such as cadmium, tellurium, selenium, and so on, causing problems in long-term bioimaging because of their cytotoxicity. In this study, we developed cadmium-free sugar-chain-immobilized fluorescent nanoparticles (SFNPs) using ZnS-AgInS2 (ZAIS) solid solution nanoparticles (NPs) of low or negligible toxicity as core components, and investigated their bioavailability and cytotoxicity. SFNPs were prepared by mixing our originally developed sugar-chain-ligand conjugates with ZAIS/ZnS core/shell NPs. In binding experiments with lectin, the obtained ZAIS/ZnS SFNPs interacted with an appropriate lectin to give specific aggregates, and their binding interaction was visually and/or spectroscopically detected. In addition, these SFNPs were successfully utilized for cytometry analysis and cellular imaging in which the cell was found to possess different sugar-binding properties. The results of the cytotoxicity assay indicated that SFNPs containing ZAIS/ZnS have much lower toxicity than those containing cadmium. These data strongly suggest that our designed SFNPs can be widely utilized in various biosensing applications involved in carbohydrates.
Collapse
Affiliation(s)
- Hiroyuki Shinchi
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University , 1-21-40 Kohrimoto, Kagoshima 890-0065, Japan
| | | | | | | | | | | | | | | |
Collapse
|