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Gui R, Jin H. Organic fluorophores-based molecular probes with dual-fluorescence ratiometric responses to in-vitro/in-vivo pH for biosensing, bioimaging and biotherapeutics applications. Talanta 2024; 275:126171. [PMID: 38703479 DOI: 10.1016/j.talanta.2024.126171] [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: 01/31/2024] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/06/2024]
Abstract
In recent years, organic fluorophores-based molecular probes with dual-fluorescence ratiometric responses to in-vitro/in-vivo pH (DFR-MPs-pH) have been attracting much interest in fundamental application research fields. More and more scientific publications have reported the exploration of various DFR-MPs-pH systems that have unique dual-fluorescence ratiometry as the signal output, in-built and signal self-calibration functions to improve precise detection of targets. DFR-MPs-pH systems possess high-performance applications in biosensing, bioimaging and biomedicine fields. This review has comprehensively summarized recent advances of DFR-MPs-pH for the first time. First of all, the compositions and types of DFR-MPs-pH are introduced by summarizing different organic fluorophores-based molecule systems. Then, construction strategies are analyzed based on specific components, structures, properties and functions of DFR-MPs-pH. Afterward, biosensing and bioimaging applications are discussed in detail, primarily referring to pH sensing and imaging detection at the levels of living cells and small animals. Finally, biomedicine applications are fully summarized, majorly involving bio-toxicity evaluation, bio-distribution, biomedical diagnosis and therapeutics. Meanwhile, the current status, challenges and perspectives are rationally commented after detailed discussions of representative and state-of-the-art studies. Overall, this present review is comprehensive, in-time and in-depth, and can facilitate the following further exploration of new and versatile DFR-MPs-pH systems toward rational design, facile preparation, superior properties, adjustable functions and highly efficient applications in promising fields.
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Affiliation(s)
- Rijun Gui
- College of Chemistry and Chemical Engineering, Intellectual Property Research Institute, Qingdao University, Shandong, 266071, PR China.
| | - Hui Jin
- College of Chemistry and Chemical Engineering, Intellectual Property Research Institute, Qingdao University, Shandong, 266071, PR China
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2
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Alharbi AH, Khan S. Antimicrobial, antioxidant, cell imaging and sensing applications of fluorescein derivatives: A review. Anal Biochem 2024; 688:115479. [PMID: 38342200 DOI: 10.1016/j.ab.2024.115479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/31/2024] [Accepted: 02/03/2024] [Indexed: 02/13/2024]
Abstract
Fluorescein itself is a synthetic organic compound and a prominent member of the xanthene dye family. It exhibits strong fluorescence under ultraviolet (UV) or blue light excitation, making it widely used in various applications, including fluorescence microscopy, flow cytometry, immunoassays, and molecular biology techniques. One of the reasons fluorescein derivatives are highly valuable is their tunable fluorescence properties. Through chemical modifications of the fluorescein structure, different functional groups or substituents can be introduce, altering the compound's fluorescence characteristics such as emission wavelength, intensity, and photo stability. This flexibility allows for tailoring of fluorescent probes to specific experimental requirements, enhancing their utility in a range of scientific disciplines. Fluorescein derivatives also possess excellent antimicrobial and antioxidant activity. This review sheds light on the significant impact of fluorescein derivatives as biological active compounds, highlighting their potential in designing new therapeutic agents with antimicrobial properties. Additionally, their role as antioxidants is discussed. A major aspect covered in the review is the application of fluorescein derivatives as powerful cell imaging probes. Their unique fluorescent properties make them valuable tools for visualizing cellular structures and processes, opening up new possibilities for studying cellular dynamics and interactions.
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Affiliation(s)
- Amani H Alharbi
- Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Sikandar Khan
- Department of Chemistry, University of Malakand, Chakdara, Khyber Pakhtunkhwa, Pakistan.
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3
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Zhao B, Kamanzi A, Zhang Y, Chan KYT, Robertson M, Leslie S, Cullis PR. Determination of the interior pH of lipid nanoparticles using a pH-sensitive fluorescent dye-based DNA probe. Biosens Bioelectron 2024; 251:116065. [PMID: 38330772 DOI: 10.1016/j.bios.2024.116065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/15/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024]
Abstract
Lipid nanoparticles (LNPs) containing ionizable cationic lipids are proven delivery systems for therapeutic nucleic acids, such as small interfering RNA (siRNA). It is important to understand the relationship between the interior pH of LNPs and the pH of the external environment to understand LNP formulation and function. Here, we developed a simple and rapid approach for determining the pH of the LNP core using a pH-sensitive fluorescent dye-based DNA probe. LNP siRNA systems containing pH-responsive DNA probes (LNP-siRNA&DNA) were generated by rapid mixing of lipids in ethanol and pH 4 aqueous buffer containing siRNA and DNA probes. We demonstrated that DNA probes were readily encapsulated in LNP systems and were sequestered into an environment at a high concentration as evidenced by an inter-probe FRET signal. It was shown that the pH of LNP encapsulated probes closely follows the pH increase or decrease of the external environment. This indicates that the clinically approved LNP RNA systems with similar lipid compositions (e.g., Onpattro and Comirnaty) are highly permeable to protons and that the pH of the interior environment closely mirrors the external environment. The pH-dependent response of the probe in LNPs was also confirmed under buffer conditions at various pHs. Furthermore, we showed that the pH-sensitive DNA probe can be incorporated into LNP systems at levels that allow the pH response to be monitored at a single LNP level using convex lens-induced confinement (CLiC) confocal microscopy. Direct visualization of the internal pH of single particles with the fluorescent DNA probe was achieved by CLiC for LNP-siRNA&DNA systems formulated under both high and normal ionic strength conditions.
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Affiliation(s)
- Bin Zhao
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.
| | - Albert Kamanzi
- Michael Smith Laboratories and Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Yao Zhang
- Michael Smith Laboratories and Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada; School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Karen Y T Chan
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Madelaine Robertson
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Sabrina Leslie
- Michael Smith Laboratories and Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Pieter R Cullis
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.
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4
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Fujita K, Urano Y. Activity-Based Fluorescence Diagnostics for Cancer. Chem Rev 2024; 124:4021-4078. [PMID: 38518254 DOI: 10.1021/acs.chemrev.3c00612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
Fluorescence imaging is one of the most promising approaches to achieve intraoperative assessment of the tumor/normal tissue margins during cancer surgery. This is critical to improve the patients' prognosis, and therefore various molecular fluorescence imaging probes have been developed for the identification of cancer lesions during surgery. Among them, "activatable" fluorescence probes that react with cancer-specific biomarker enzymes to generate fluorescence signals have great potential for high-contrast cancer imaging due to their low background fluorescence and high signal amplification by enzymatic turnover. Over the past two decades, activatable fluorescence probes employing various fluorescence control mechanisms have been developed worldwide for this purpose. Furthermore, new biomarker enzymatic activities for specific types of cancers have been identified, enabling visualization of various types of cancers with high sensitivity and specificity. This Review focuses on recent advances in the design, function and characteristics of activatable fluorescence probes that target cancer-specific enzymatic activities for cancer imaging and also discusses future prospects in the field of activity-based diagnostics for cancer.
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5
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Sugiyama K, Shimano H, Takahashi M, Shimura Y, Shimura A, Furuya T, Tomabechi R, Shirasaka Y, Higuchi K, Kishimoto H, Inoue K. The Use of Carboxyfluorescein Reveals the Transport Function of MCT6/SLC16A5 Associated with CD147 as a Chloride-Sensitive Organic Anion Transporter in Mammalian Cells. J Pharm Sci 2024; 113:1113-1120. [PMID: 38160712 DOI: 10.1016/j.xphs.2023.12.023] [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: 10/07/2023] [Revised: 12/25/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
Oral drug absorption involves drug permeation across the apical and basolateral membranes of enterocytes. Although transporters mediating the influx of anionic drugs in the apical membranes have been identified, transporters responsible for efflux in the basolateral membranes remain unclear. Monocarboxylate transporter 6 (MCT6/SLC16A5) has been reported to localize to the apical and basolateral membranes of human enterocytes and to transport organic anions such as bumetanide and nateglinide in the Xenopus oocyte expression system; however, its transport functions have not been elucidated in detail. In this study, we characterized the function of MCT6 expressed in HEK293T cells and explored fluorescent probes to more easily evaluate MCT6 function. The results illustrated that MCT6 interacts with CD147 to localize at the plasma membrane. When the uptake of various fluorescein derivatives was examined in NaCl-free uptake buffer (pH 5.5), the uptake of 5-carboxyfluorescein (5-CF) was significantly greater in MCT6 and CD147-expressing cells. MCT6-mediated 5-CF uptake was saturable with a Km of 1.07 mM and inhibited by several substrates/inhibitors of organic anion transporters and extracellular Cl ion with an IC50 of 53.7 mM. These results suggest that MCT6 is a chloride-sensitive organic anion transporter that can be characterized using 5-CF as a fluorescent probe.
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Affiliation(s)
- Koki Sugiyama
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroe Shimano
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Masaki Takahashi
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Yuta Shimura
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Asuka Shimura
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Takahito Furuya
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Ryuto Tomabechi
- Laboratory of Pharmaceutics, Kitasato University School of Pharmacy, Tokyo, Japan
| | - Yoshiyuki Shirasaka
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Kei Higuchi
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hisanao Kishimoto
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Katsuhisa Inoue
- Department of Biopharmaceutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan.
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6
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Menassol G, van der Sanden B, Gredy L, Arnol C, Divoux T, Martin DK, Stephan O. Gelatine-collagen photo-crosslinkable 3D matrixes for skin regeneration. Biomater Sci 2024; 12:1738-1749. [PMID: 38372031 DOI: 10.1039/d3bm01849k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Immediate care of skin wounds and burns is essential to repair this mechanical and chemical barrier to infections. Hydrogels have become one of the standard methods for wound care. Here, gelatine-collagen photo-crosslinkable matrixes or hydrogels were manufactured by two-photon polymerization (TPP) or one-photon UV exposure using a Digital Light Processing (DLP) setup. Both techniques are able to construct matrixes from computer-aided design models, which is important for future clinical applications in which wound dressings should be customized. Although TPP can mimic the 3D dermo-epidermal junction with a high spatial resolution (i.e., ∼6 μm3), the manufacturing time was too slow to produce large wound dressings. Therefore, a DLP setup was explored in this study to fabricate large 2D matrixes of several cm2 using the same photo-resist as for TPP, except for the photoinitiator. The fibroblast viability, adherence, and proliferation were analysed in time on both 3D and 2D matrixes in vitro using two-photon microscopy. For both types of matrixes, the adherence and proliferation of fibroblasts (3T3-NIH) were optimal for stiff structures with a Young's modulus of 191 ± 35 kPa compared to softer matrixes of 37 ± 12 kPa. Fibroblast showed complete confluence on Day 14 after seeding on these matrixes, which may create the granulation tissue composed of fibronectin, collagen, and various proteoglycans in the future dermis before repair of the epidermis and disintegrating of their host matrix. For the monitoring of this repair, gelatine-collagen matrixes can easily incorporate bio-optical sensors for the simultaneous monitoring of inflammation processes and wound healing in time.
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Affiliation(s)
- Gauthier Menassol
- MoVe, Laboratoire interdisciplinaire de physique, CNRS UMR 5588, Université Grenoble Alpes, St-Martin d'Hères, France.
| | - Boudewijn van der Sanden
- SyNaBi & Platform of Intravital Microscopy, TIMC, CNRS UMR 5525, Université Grenoble Alpes, Grenoble INP, INSERM, Grenoble, France.
| | - Laetitia Gredy
- MoVe, Laboratoire interdisciplinaire de physique, CNRS UMR 5588, Université Grenoble Alpes, St-Martin d'Hères, France.
| | - Capucine Arnol
- SyNaBi & Platform of Intravital Microscopy, TIMC, CNRS UMR 5525, Université Grenoble Alpes, Grenoble INP, INSERM, Grenoble, France.
| | - Thibaut Divoux
- ENSL, CNRS, Laboratoire de Physique, F-69342 Lyon, France.
| | - Donald K Martin
- SyNaBi & Platform of Intravital Microscopy, TIMC, CNRS UMR 5525, Université Grenoble Alpes, Grenoble INP, INSERM, Grenoble, France.
| | - Olivier Stephan
- MoVe, Laboratoire interdisciplinaire de physique, CNRS UMR 5588, Université Grenoble Alpes, St-Martin d'Hères, France.
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7
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Chrisnasari R, Ewing TA, Hilgers R, van Berkel WJH, Vincken JP, Hennebelle M. Versatile ferrous oxidation-xylenol orange assay for high-throughput screening of lipoxygenase activity. Appl Microbiol Biotechnol 2024; 108:266. [PMID: 38498184 PMCID: PMC10948578 DOI: 10.1007/s00253-024-13095-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/02/2024] [Accepted: 02/28/2024] [Indexed: 03/20/2024]
Abstract
Lipoxygenases (LOXs) catalyze dioxygenation of polyunsaturated fatty acids (PUFAs) into fatty acid hydroperoxides (FAHPs), which can be further transformed into a number of value-added compounds. LOXs have garnered interest as biocatalysts for various industrial applications. Therefore, a high-throughput LOX activity assay is essential to evaluate their performance under different conditions. This study aimed to enhance the suitability of the ferrous-oxidized xylenol orange (FOX) assay for screening LOX activity across a wide pH range with different PUFAs. The narrow linear detection range of the standard FOX assay restricts its utility in screening LOX activity. To address this, the concentration of perchloric acid in the xylenol orange reagent was adjusted. The modified assay exhibited a fivefold expansion in the linear detection range for hydroperoxides and accommodated samples with pH values ranging from 3 to 10. The assay could quantify various hydroperoxide species, indicating its applicability in assessing LOX substrate preferences. Due to sensitivity to pH, buffer types, and hydroperoxide species, the assay required calibration using the respective standard compound diluted in the same buffer as the measured sample. The use of correction factors is suggested when financial constraints limit the use of FAHP standard compounds in routine LOX substrate preference analysis. FAHP quantification by the modified FOX assay aligned well with results obtained using the commonly used conjugated diene method, while offering a quicker and broader sample pH range assessment. Thus, the modified FOX assay can be used as a reliable high-throughput screening method for determining LOX activity. KEY POINTS: • Modifying perchloric acid level in FOX reagent expands its linear detection range • The modified FOX assay is applicable for screening LOX activity in a wide pH range • The modified FOX assay effectively assesses substrate specificity of LOX.
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Affiliation(s)
- Ruth Chrisnasari
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
- Wageningen Food & Biobased Research, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
- Faculty of Biotechnology, University of Surabaya (UBAYA), Surabaya, 60293, Indonesia
| | - Tom A Ewing
- Wageningen Food & Biobased Research, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands.
| | - Roelant Hilgers
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - Willem J H van Berkel
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - Jean-Paul Vincken
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - Marie Hennebelle
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands.
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8
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Sakamoto DM, Tamura I, Yi B, Hasegawa S, Saito Y, Yamada N, Takakusagi Y, Kubota SI, Kobayashi M, Harada H, Hanaoka K, Taki M, Nangaku M, Tainaka K, Sando S. Whole-Body and Whole-Organ 3D Imaging of Hypoxia Using an Activatable Covalent Fluorescent Probe Compatible with Tissue Clearing. ACS NANO 2024; 18:5167-5179. [PMID: 38301048 DOI: 10.1021/acsnano.3c12716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Elucidation of biological phenomena requires imaging of microenvironments in vivo. Although the seamless visualization of in vivo hypoxia from the level of whole-body to single-cell has great potential to discover unknown phenomena in biological and medical fields, no methodology for achieving it has been established thus far. Here, we report the whole-body and whole-organ imaging of hypoxia, an important microenvironment, at single-cell resolution using activatable covalent fluorescent probes compatible with tissue clearing. We initially focused on overcoming the incompatibility of fluorescent dyes and refractive index matching solutions (RIMSs), which has greatly hindered the development of fluorescent molecular probes in the field of tissue clearing. The fluorescent dyes compatible with RIMS were then incorporated into the development of activatable covalent fluorescent probes for hypoxia. We combined the probes with tissue clearing, achieving comprehensive single-cell-resolution imaging of hypoxia in a whole mouse body and whole organs.
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Affiliation(s)
- Daichi M Sakamoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Iori Tamura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Bo Yi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Sho Hasegawa
- Division of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Yutaro Saito
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Naoki Yamada
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoichi Takakusagi
- Quantum Hyperpolarized MRI Team, Institute for Quantum Life Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba-city 263-8555, Japan
- Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba-city 263-8555, Japan
| | - Shimpei I Kubota
- Division of Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Hokkaido 060-0815, Japan
| | - Minoru Kobayashi
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
- Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroshi Harada
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
- Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kenjiro Hanaoka
- Division of Analytical Chemistry for Drug Discovery, Graduate School of Pharmaceutical Sciences, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Masayasu Taki
- Institute of Transformative Bio-Molecules, Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Kazuki Tainaka
- Department of System Pathology for Neurological Disorders, Brain Research Institute, Niigata University, 1-757 Asahimachidori, Chuo-ku, Niigata 951-8585, Japan
- Gftd DeSci, Gftd DAO, Nishikawa Building, 20 Kikuicho, Shinjuku-ku, Tokyo 162-0044, Japan
| | - Shinsuke Sando
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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9
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Mantooth SM, Hancock AM, Thompson PM, Varghese P J G, Meritet DM, Vrabel MR, Hu J, Zaharoff DA. Characterization of an Injectable Chitosan Hydrogel for the Tunable, Localized Delivery of Immunotherapeutics. ACS Biomater Sci Eng 2024; 10:905-920. [PMID: 38240491 DOI: 10.1021/acsbiomaterials.3c01580] [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] [Indexed: 02/13/2024]
Abstract
Localized delivery of immunotherapeutics within a tumor has the potential to reduce systemic toxicities and improve treatment outcomes in cancer patients. Unfortunately, local retention of therapeutics following intratumoral injection is problematic and is insufficiently considered. Dense tumor architectures and high interstitial pressures rapidly exclude injections of saline and other low-viscosity solutions. Hydrogel-based delivery systems, on the other hand, can resist shear forces that cause tumor leakage and thus stand to improve the local retention of coformulated therapeutics. The goal of the present work was to construct a novel, injectable hydrogel that could be tuned for localized immunotherapy delivery. A chitosan-based hydrogel, called XCSgel, was developed and subsequently characterized. Nuclear magnetic resonance studies were performed to describe the chemical properties of the new entity, while cryo-scanning electron microscopy allowed for visualization of the hydrogel's cross-linked network. Rheology experiments demonstrated that XCSgel was shear-thinning and self-healing. Biocompatibility studies, both in vitro and in vivo, showed that XCSgel was nontoxic and induced transient mild-to-moderate inflammation. Release studies revealed that coformulated immunotherapeutics were released over days to weeks in a charge-dependent manner. Overall, XCSgel displayed several clinically important features, including injectability, biocompatibility, and imageability. Furthermore, the properties of XCSgel could also be controlled to tune the release of coformulated immunotherapeutics.
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Affiliation(s)
- Siena M Mantooth
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Asher M Hancock
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Peter M Thompson
- Molecular Education, Technology and Research Innovation Center, North Carolina State University, Raleigh, North Carolina 27606, United States
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - George Varghese P J
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Danielle M Meritet
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Maura R Vrabel
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Jingjie Hu
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - David A Zaharoff
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27606, United States
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10
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Maxted G, Estrela P, Moschou D. Employing electrochemically derived pH gradients for Lab-on-PCB protein preconcentration devices. MICROSYSTEMS & NANOENGINEERING 2024; 10:10. [PMID: 38261896 PMCID: PMC10796359 DOI: 10.1038/s41378-023-00638-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/22/2023] [Accepted: 10/16/2023] [Indexed: 01/25/2024]
Abstract
Protein preconcentration is an essential sample preparation step for analysis in which the targeted proteins exist in low concentrations, such as bodily fluids, water, or wastewater. Nonetheless, very few practical implementations of miniaturized protein preconcentration devices have been demonstrated in practice, and even fewer have been integrated with other microanalytical steps. Existing approaches rely heavily on additional chemicals and reagents and introduce complexity to the overall assay. In this paper, we propose a novel miniaturized isoelectric focusing-based protein preconcentration screening device based on electrochemically derived pH gradients rather than existing chemical reagent approaches. In this way, we reduce the need for additional chemical reagents to zero while enabling device incorporation in a seamlessly integrated full protein analysis microsystem via Lab-on-PCB technology. We apply our previously presented Lab-on-PCB approach to quantitatively control the pH of a solution in the vicinity of planar electrodes using electrochemical acid generation through redox-active self-assembled monolayers. The presented device comprises a printed circuit board with an array of gold electrodes that were functionalized with 4-aminothiophenol; this formed a self-assembled monolayer that was electropolymerized to improve its electrochemical reversibility. Protein preconcentration was performed in two configurations. The first was open and needed the use of a holder to suspend a well of fluid above the electrodes; the second used microfluidic channels to enclose small volumes of fluid. Reported here are the resulting data for protein preconcentration in both these forms, with a quantitative concentration factor shown for the open form and qualitative proof shown for the microfluidic.
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Affiliation(s)
- Grace Maxted
- Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY UK
- Centre for Bioengineering and Biomedical Technologies (CBio), University of Bath, Bath, BA2 7AY UK
| | - Pedro Estrela
- Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY UK
- Centre for Bioengineering and Biomedical Technologies (CBio), University of Bath, Bath, BA2 7AY UK
| | - Despina Moschou
- Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY UK
- Centre for Bioengineering and Biomedical Technologies (CBio), University of Bath, Bath, BA2 7AY UK
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11
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Sharifi AR, Ardalan S, Tabatabaee RS, Soleimani Gorgani S, Yousefi H, Omidfar K, Kiani MA, Dincer C, Naghdi T, Golmohammadi H. Smart Wearable Nanopaper Patch for Continuous Multiplexed Optical Monitoring of Sweat Parameters. Anal Chem 2023; 95:16098-16106. [PMID: 37882624 DOI: 10.1021/acs.analchem.3c02044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Notwithstanding the substantial progress in optical wearable sensing devices, developing wearable optical sensors for simultaneous, real-time, and continuous monitoring of multiple biomarkers is still an important, yet unmet, demand. Aiming to address this need, we introduced for the first time a smart wearable optical sensor (SWOS) platform combining a multiplexed sweat sensor sticker with its IoT-enabled readout module. We employed our SWOS system for on-body continuous, real-time, and simultaneous fluorimetric monitoring of sweat volume (physical parameter) and pH (chemical marker). Herein, a variation in moisture (5-45 μL) or pH (4.0-7.0) causes a color/fluorescence change in the copper chloride/fluorescein immobilized within a transparent chitin nanopaper (ChNP) in a selective and reversible manner. Human experiments conducted on athletic volunteers during exercise confirm that our developed SWOS platform can be efficiently exploited for smart perspiration analysis toward personalized health monitoring. Moreover, our system can be further extended for the continuous and real-time multiplexed monitoring of various biomarkers (metabolites, proteins, or drugs) of sweat or other biofluids (for example, analyzing exhaled breath by integrating onto a facemask).
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Affiliation(s)
- Amir Reza Sharifi
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
| | - Sina Ardalan
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
| | - Raziyeh Sadat Tabatabaee
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
| | - Sara Soleimani Gorgani
- Biosensor Research Center, Endocrinology and Metabolism Cellular and Molecular Sciences Institute, Tehran University of Medical Sciences, 14395/1179 Tehran, Iran
| | - Hossein Yousefi
- Laboratory of Sustainable Nanomaterials, Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan 4913815739, Iran
| | - Kobra Omidfar
- Biosensor Research Center, Endocrinology and Metabolism Cellular and Molecular Sciences Institute, Tehran University of Medical Sciences, 14395/1179 Tehran, Iran
| | - Mohammad Ali Kiani
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
| | - Can Dincer
- FIT Freiburg Centre for Interactive Materials and Bioinspired Technology, University of Freiburg, Freiburg 79110, Germany
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg 79110, Germany
| | - Tina Naghdi
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg 79110, Germany
| | - Hamed Golmohammadi
- Nanosensor Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186 Tehran, Iran
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg 79110, Germany
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12
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Bian Z, Dai C, Chu F, Hu A, Xue L, Xu Q, Feng Y, Zhou B. pH biosensors based on hydrogel optical fiber. APPLIED OPTICS 2023; 62:8272-8278. [PMID: 38037929 DOI: 10.1364/ao.501549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 10/09/2023] [Indexed: 12/02/2023]
Abstract
This paper presents a hydrogel optical fiber fluorescence pH sensor doped with 5(6)-carboxyfluorescein (5(6)-FAM). The hydrogel optical fiber was fabricated with 2-hydroxy-2-methylpropiophenone as a photoinitiator, with different concentrations of polyethylene glycol diacrylate (PEGDA) for the core and cladding. A pH-sensitive fluorescence indicator 5(6)-FAM was doped into the core of the fiber. The prepared hydrogel optical fiber pH sensor showed good response within the pH range of 5.0-9.0. The linear range of the pH sensor is 6.0 to 8.0, with R 2=0.9904; within this range, the sensor shows good repeatability and reversibility, and the resolution is 0.07 pH units. The pHs of pork tissues soaked in different pH buffers were detected by the hydrogel optical fiber pH sensor; the linearity is 0.9828 when the pork tissue pH is in the range of 6.0-7.5. Due to the good ion permeability and biocompatibility of the hydrogel, this hydrogel optical fiber pH sensor is expected to be used in biomedical applications.
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13
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Chae S, Kim MS, Kim JH, Fortner JD. Nanobubble Reactivity: Evaluating Hydroxyl Radical Generation (or Lack Thereof) under Ambient Conditions. ACS ES&T ENGINEERING 2023; 3:1504-1510. [PMID: 37854075 PMCID: PMC10581208 DOI: 10.1021/acsestengg.3c00124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 10/20/2023]
Abstract
Nanobubble (NB) generation of reactive oxygen species (ROS), especially hydroxyl radical (·OH), has been controversial. In this work, we extensively characterize NBs in solution, with a focus on ROS generation (as ·OH), through a number of methods including degradation of ·OH-specific target compounds, electron paramagnetic resonance (EPR), and a fluorescence-based indicator. Generated NBs exhibit consistent physical characteristics (size, surface potential, and concentration) when compared with previous studies. For conditions described, which are considered as high O2 NB concentrations, no degradation of benzoic acid (BA), a well-studied ·OH scavenger, was observed in the presence of NBs (over 24 h) and no EPR signal for ·OH was detected. While a positive fluorescence response was measured when using a fluorescence probe for ·OH, aminophenyl fluorescein (APF), we provide an alternate explanation for the result. Gas/liquid interfacial characterization indicates that the surface of a NB is proton-rich and capable of inducing acid-catalyzed hydrolysis of APF, which results in a false (positive) fluorescence response. Given these negative results, we conclude that NB-induced ·OH generation is minimal, if at all, for conditions evaluated.
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Affiliation(s)
- Seung
Hee Chae
- Department
of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave., New Haven, Connecticut 06520, United States
| | - Min Sik Kim
- Department
of Environmental Engineering and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea
| | - Jae-Hong Kim
- Department
of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave., New Haven, Connecticut 06520, United States
| | - John D. Fortner
- Department
of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave., New Haven, Connecticut 06520, United States
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14
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Pronkin PG, Tatikolov AS. Photonics of Some Monomethine Cyanine Dyes in Solutions and in Complexes with Biomolecules. Int J Mol Sci 2023; 24:13954. [PMID: 37762255 PMCID: PMC10531095 DOI: 10.3390/ijms241813954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/03/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
In search of new probes for biomolecules, the spectral fluorescent study of four monomethine cyanine dyes (MCD), both unsymmetrical and symmetrical, has been carried out in different organic solvents, in aqueous buffer solutions, and in the presence of DNA and HSA. The complexation of MCD with biomacromolecules leads to a steep growth of the fluorescence intensity. Complexes of MCD with dsDNA and HSA of various types were modeled in silico by molecular docking. Experiments on thermal dissociation of dsDNA in the presence of MCD showed the formation of intercalative complexes of MCD with DNA. Quenching of intrinsic fluorescence of HSA by MCD occurred with rate constants much higher than the diffusion limit, that is, in dye-HSA complexes. Effective constants of MCD complexation with the biomacromolecules were estimated. MCD 1 has the best characteristics as a possible fluorescent probe for dsDNA and can serve as a sensitive and selective probe for dsDNA in the presence of HSA. Photochemical properties of MCD complexed with DNA have been also studied. An increase in the quantum yield of the triplet states of MCD in complexes with DNA has been found, which may be important for using these dyes as potential candidates in photodynamic therapy.
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Affiliation(s)
| | - Alexander S. Tatikolov
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin Str., 119334 Moscow, Russia;
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15
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Tsuchida S, Himi N, Miura Y, Kodama S, Shindo T, Nakagawa K, Aoki T. Photoinduced electron transfer detection method for identifying UGT1A1*28 microsatellites. PLoS One 2023; 18:e0289506. [PMID: 37535593 PMCID: PMC10399816 DOI: 10.1371/journal.pone.0289506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/19/2023] [Indexed: 08/05/2023] Open
Abstract
During development of a novel detection method for the UDP-glucuronosyl transferase 1A1 (UGT1A1)*28, the fluorescence intensity of a dye conjugated to cytosine (C) at the end of a DNA strand decreased upon hybridization with guanine (G). This phenomenon is referred to as photoinduced electron transfer (PeT). Using this phenomenon, we devised a method for the naked-eye detection of UGT1A1*28 (thymine-adenine (TA)-repeat polymorphism). Fluorescently labeled single-stranded DNA (ssDNA) oligonucleotides (probes) were designed and hybridized with complementary strand DNAs (target DNAs). Base pair formation at the blunt end between fluorescently labeled C (probe side) and G (target side), induced dramatic fluorescence quenching. Additionally, when the labeled-CG pair formed near the TA-repeat sequence, different TA-repeat numbers were discriminated. However, obtaining enough target DNA for this probe by typical polymerase chain reaction (PCR) was difficult. To enable the practical use of the probe, producing sufficient target DNA remains problematic.
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Affiliation(s)
- Shirou Tsuchida
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Noriaki Himi
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Yuuki Miura
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Suzune Kodama
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Tsugumi Shindo
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Koji Nakagawa
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
| | - Takashi Aoki
- Division of Biochemistry, Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari-gun, Hokkaido, Japan
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16
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Tri BD, Shashni B, Matsui H, Nagasaki Y. Designing poly(gamma-aminobutyric acid)-based nanoparticles for the treatment of major depressive disorders. J Control Release 2023; 360:110-121. [PMID: 37336293 DOI: 10.1016/j.jconrel.2023.06.021] [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: 01/06/2023] [Revised: 05/15/2023] [Accepted: 06/14/2023] [Indexed: 06/21/2023]
Abstract
Major depressive disorder (MDD) is a worldwide concern owing to its negative impact on the quality of life. Gamma-aminobutyric acid (GABA), an essential neurotransmitter in the brain, is important for regulating the enteric nervous system and gut-brain dual communication (gut-brain axis), thus providing gastrointestinal GABA and GABA-related pathways with possible targets for MDD treatment. However, the use of GABA for this disease remains limited due to its poor pharmacokinetic properties, including the low permeability through the blood-brain barrier, and the rapid clearance from the gastrointestinal tract. Since poly(amino acid)s are advantageous for improving the beneficial bioactivities of conventional amino acids, poly(gamma-aminobutyric acid) (poly(GABA)) is a potential candidate for MDD therapy. Nevertheless, the non-water-soluble and non-dispersible characteristics of poly(GABA) render difficulty in administering its conventional forms in vitro/in vivo, thereby hindering its therapeutic applications. Therefore, this study proposes a new design for poly(GABA) in nanoparticle form, which is composed of the amphiphilic diblock copolymers of poly(GABA) and poly(ethylene glycol), providing a suitable formulation for medication applications. Herein, we report on a new orally deliverable poly(GABA)-based nanoparticles (NanoGABA) in aqueous media and their efficacy on mouse depression models. NanoGABA treatment efficiently attenuated depression-like symptoms as evidenced by behavioral tests (forced swimming tests and tail suspension tests) and stress biomarkers (corticosterone). These findings suggest that the newly designed poly(GABA)-based nanoparticles are a promising candidate for the treatment of depression. STATEMENT OF SIGNIFICANCE: This research is the first to report the preparation of poly(GABA)-based nanoparticles in aqueous conditions with beneficial physical properties to open the gate for medical and pharmaceutical applications of poly (GABA). It is also a pioneer in using poly(GABA)-based materials for major depressive disorder therapeutics in vivo. Oral administration of NanoGABA attenuates depressive-like symptoms by targeting the enteric nervous system possibly through modulation of the gut-brain axis pathways with negligible toxicity, suggesting that NanoGABA is a promising therapeutic agent for major depressive disorders.
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Affiliation(s)
- Bui Duc Tri
- Degree Program in Pure and Applied Sciences, Graduate School of Science and Technology, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan
| | - Babita Shashni
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan
| | - Hirofumi Matsui
- Division of Gastroenterology, Faculty of Medicine, University of Tsukuba, Tennodai 1-1-1, Ibaraki 305-8575, Japan; Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan
| | - Yukio Nagasaki
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Center for Research in Radiation and Earth System Science (CRiES), University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8654, Japan.
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17
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Godeffroy L, Makogon A, Gam Derouich S, Kanoufi F, Shkirskiy V. Imaging and Quantifying the Chemical Communication between Single Particles in Metal Alloys. Anal Chem 2023. [PMID: 37327768 DOI: 10.1021/acs.analchem.3c01258] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The communication within particle agglomerates in industrial alloys can have a significant impact on the macroscopic reactivity, putting a high demand on the adaptation of wide-field methodologies to clarify this phenomenon. In this work, we report the application of correlated optical microscopies probing operando both local pH and local surface chemical transformation correlated with identical location scanning electron microscopy to quantify in situ the structure reactivity of particle agglomerates of foreign elements in the Al alloy. The optical operando analyses allow us (i) to reveal and quantify the local production of OH- from proton and oxygen reduction at individual Si- or Fe-rich microparticles and (ii) to quantify (and model) the chemical communication between these active sites, within a few micrometer range, on the local chemical transformation of the material. Wide-field image analysis highlights the statistical importance of chemical communication that may introduce a new conceptual framework for the understanding of the mechanisms in related fields of charge transfer, electrocatalysis, and corrosion.
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18
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Rizzo R, Onesto V, Morello G, Iuele H, Scalera F, Forciniti S, Gigli G, Polini A, Gervaso F, del Mercato LL. pH-sensing hybrid hydrogels for non-invasive metabolism monitoring in tumor spheroids. Mater Today Bio 2023; 20:100655. [PMID: 37234366 PMCID: PMC10205545 DOI: 10.1016/j.mtbio.2023.100655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/14/2023] [Accepted: 05/01/2023] [Indexed: 05/27/2023] Open
Abstract
The constant increase in cancer incidence and mortality pushes biomedical research towards the development of in vitro 3D systems able to faithfully reproduce and effectively probe the tumor microenvironment. Cancer cells interact with this complex and dynamic architecture, leading to peculiar tumor-associated phenomena, such as acidic pH conditions, rigid extracellular matrix, altered vasculature, hypoxic condition. Acidification of extracellular pH, in particular, is a well-known feature of solid tumors, correlated to cancer initiation, progression, and resistance to therapies. Monitoring local pH variations, non-invasively, during cancer growth and in response to drug treatment becomes extremely important for understanding cancer mechanisms. Here, we describe a simple and reliable pH-sensing hybrid system, based on a thermoresponsive hydrogel embedding optical pH sensors, that we specifically apply for non-invasive and accurate metabolism monitoring in colorectal cancer (CRC) spheroids. First, the physico-chemical properties of the hybrid sensing platform, in terms of stability, rheological and mechanical properties, morphology and pH sensitivity, were fully characterized. Then, the proton gradient distribution in the spheroids proximity, in the presence or absence of drug treatment, was quantified over time by time lapse confocal light scanning microscopy and automated segmentation pipeline, highlighting the effects of the drug treatment in the extracellular pH. In particular, in the treated CRC spheroids the acidification of the microenvironment resulted faster and more pronounced over time. Moreover, a pH gradient distribution was detected in the untreated spheroids, with more acidic values in proximity of the spheroids, resembling the cell metabolic features observed in vivo in the tumor microenvironment. These findings promise to shed light on mechanisms of regulation of proton exchanges by cellular metabolism being essential for the study of solid tumors in 3D in vitro models and the development of personalized medicine approaches.
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Affiliation(s)
- Riccardo Rizzo
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Valentina Onesto
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Giulia Morello
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
- Department of Mathematics and Physics ‘‘Ennio De Giorgi”, University of Salento, C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Helena Iuele
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Francesca Scalera
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Stefania Forciniti
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Giuseppe Gigli
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
- Department of Mathematics and Physics ‘‘Ennio De Giorgi”, University of Salento, C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Alessandro Polini
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Francesca Gervaso
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
| | - Loretta L. del Mercato
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), C/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy
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19
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Guo WY, Fu YX, Mei LC, Chen Z, Zhang ZY, Wang F, Yang WC, Liu G, Yang GF. Rational Design of Esterase-Insensitive Fluorogenic Probes for In Vivo Imaging. ACS Sens 2023; 8:2041-2049. [PMID: 37146071 DOI: 10.1021/acssensors.3c00264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Small-molecule fluorogenic probes are indispensable tools for performing research in biomedical fields and chemical biology. Although numerous cleavable fluorogenic probes have been developed to investigate various bioanalytes, few of them meet the baseline requirements for in vivo biosensing for disease diagnosis due to their insufficient specificity resulted from the remarkable esterase interferences. To address this critical issue, we developed a general approach called fragment-based fluorogenic probe discovery (FBFPD) to design esterase-insensitive probes for in vitro and in vivo applications. With the designed esterase-insensitive fluorogenic probe, we successfully achieved light-up in vivo imaging and quantitative analysis of cysteine. This strategy was further extended to design highly specific fluorogenic probes for other representative targets, sulfites, and chymotrypsin. The present study expands the bioanalytical toolboxes available and offers a promising platform to develop esterase-insensitive cleavable fluorogenic probes for in vivo biosensing and bioimaging for the early diagnosis of diseases.
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Affiliation(s)
- Wu-Yingzheng Guo
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Yi-Xuan Fu
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Long-Can Mei
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Zhao Chen
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Zi-Ye Zhang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Fan Wang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Wen-Chao Yang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
| | - Guozhen Liu
- School of Medicine, The Chinese University of Hong Kong, Shenzhen 518172, P.R. China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, P.R. China
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20
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Kamino S, Uchiyama M. Xanthene-based functional dyes: towards new molecules operating in the near-infrared region. Org Biomol Chem 2023; 21:2458-2471. [PMID: 36661341 DOI: 10.1039/d2ob02208g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Xanthene-based functional dyes have diverse applications in life science and materials science. A current challenge is to develop new dyes with suitable physicochemical properties, including near-infrared (NIR) operation, for advanced biological applications such as medical diagnostics and molecular imaging. In this review, we first present an overview of xanthene-based functional dyes and then focus on synthetic strategies for modulating the absorption and fluorescence of dyes that operate in the NIR wavelength region with bright emission and good photostability. We also introduce our work on aminobenzopyranoxanthenes (ABPXs) and bridged tetra-aryl-p-quinodimethanes (BTAQs) as new xanthene-based far-red (FR)/NIR absorbing/emitting molecules whose absorption/fluorescence wavelengths change in response to external stimuli.
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Affiliation(s)
- Shinichiro Kamino
- School of Pharmaceutical Sciences, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan.
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
- Research Initiative for Supra-Materials (RISM), Shinshu University, 3-15-1 Tokita, Ueda, Japan
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21
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Kumar B, Saraf P, Sarkar M, Kumar D. Efficient synthesis of α/β-isomeric oxadiazolyl and triazolopyridyl BODIPYs for sensing of Hg2+ ions and pH sensors. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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22
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Salavati R, Sarrafi Y, Tajbakhsh M. A Selective and ''Off-On'' Fluorescent Chemosensor Based on Fluorescein for Al 3+: Synthesis, Characterization, Spectroscopy Analyses, and DFT Calculation. J Fluoresc 2023; 33:639-651. [PMID: 36472774 DOI: 10.1007/s10895-022-03087-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/11/2022] [Indexed: 12/12/2022]
Abstract
An efficient fluorescent cation chemosensor based on fluorescein L4 was well prepared and identified with spectroscopy analyses. UV-vis and fluorescence measurements examined the analyte complexation of the L4 with various cations, demonstrating a clear tendency to Al3+ ion. In the Job plot study, a stoichiometry ratio of a complex between L4 and Al3+ ion was determined to be 1: 2 (L4: Al3+). A stoichiometry ratio of complex between L4 and Al3+ ion was determined to be 1: 2 (L4: Al3+) using the Job plot. The association constant (Ka) of the L4-Al3+ complex was found 2.8 × 107 M-2. The obtained limit of detection (LOD) value (1.37 × 10-6 M for Al3+) exhibited the considerable sensitivity of the chemosensor L4 to Al3+ ion. DFT/TD-DFT calculations have also been employed to support the binding mode and photophysical properties of the complexation of chemosensor L4 to Al3+ ion and also to investigate the enhancement of L4 fluorescence by Al3+ ion.
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Affiliation(s)
- Reza Salavati
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, 47416-95447, Iran
| | - Yaghoub Sarrafi
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, 47416-95447, Iran.
| | - Mahmood Tajbakhsh
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, 47416-95447, Iran
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23
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Onesto V, Forciniti S, Alemanno F, Narayanankutty K, Chandra A, Prasad S, Azzariti A, Gigli G, Barra A, De Martino A, De Martino D, del Mercato LL. Probing Single-Cell Fermentation Fluxes and Exchange Networks via pH-Sensing Hybrid Nanofibers. ACS NANO 2023; 17:3313-3323. [PMID: 36573897 PMCID: PMC9979640 DOI: 10.1021/acsnano.2c06114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/19/2022] [Indexed: 05/31/2023]
Abstract
The homeostatic control of their environment is an essential task of living cells. It has been hypothesized that, when microenvironmental pH inhomogeneities are induced by high cellular metabolic activity, diffusing protons act as signaling molecules, driving the establishment of exchange networks sustained by the cell-to-cell shuttling of overflow products such as lactate. Despite their fundamental role, the extent and dynamics of such networks is largely unknown due to the lack of methods in single-cell flux analysis. In this study, we provide direct experimental characterization of such exchange networks. We devise a method to quantify single-cell fermentation fluxes over time by integrating high-resolution pH microenvironment sensing via ratiometric nanofibers with constraint-based inverse modeling. We apply our method to cell cultures with mixed populations of cancer cells and fibroblasts. We find that the proton trafficking underlying bulk acidification is strongly heterogeneous, with maximal single-cell fluxes exceeding typical values by up to 3 orders of magnitude. In addition, a crossover in time from a networked phase sustained by densely connected "hubs" (corresponding to cells with high activity) to a sparse phase dominated by isolated dipolar motifs (i.e., by pairwise cell-to-cell exchanges) is uncovered, which parallels the time course of bulk acidification. Our method addresses issues ranging from the homeostatic function of proton exchange to the metabolic coupling of cells with different energetic demands, allowing for real-time noninvasive single-cell metabolic flux analysis.
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Affiliation(s)
- Valentina Onesto
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
| | - Stefania Forciniti
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
| | - Francesco Alemanno
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
- Dipartimento
di Matematica e Fisica E. De Giorgi, University
of Salento, 73100Lecce, Italy
- Istituto
Nazionale di Fisica Nucleare (INFN), Sezione di Lecce, 73100Lecce, Italy
| | | | - Anil Chandra
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
| | - Saumya Prasad
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
| | - Amalia Azzariti
- IRCCS
Istituto Tumori Giovanni Paolo II, V.le O. Flacco, 65, 70124Bari, Italy
| | - Giuseppe Gigli
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
- Dipartimento
di Matematica e Fisica E. De Giorgi, University
of Salento, 73100Lecce, Italy
| | - Adriano Barra
- Dipartimento
di Matematica e Fisica E. De Giorgi, University
of Salento, 73100Lecce, Italy
- Istituto
Nazionale di Fisica Nucleare (INFN), Sezione di Lecce, 73100Lecce, Italy
| | - Andrea De Martino
- Politecnico
di Torino, Corso Duca degli Abruzzi, 24, I-10129Torino, Italy
- Italian Institute
for Genomic Medicine, IRCCS Candiolo, SP-142, I-10060Candiolo, Italy
| | - Daniele De Martino
- Biofisika
Institutua (UPV/EHU, CSIC) and Fundación Biofísica Bizkaia, LeioaE-48940, Spain
- Ikerbasque
Foundation, Bilbao48013, Spain
| | - Loretta L. del Mercato
- Institute
of Nanotechnology, National Research Council
(CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100Lecce, Italy
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24
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Zapata-Farfan J, Kafshgari MH, Patskovsky S, Meunier M. Dynamic multispectral detection of bacteria with nanoplasmonic markers. NANOSCALE 2023; 15:3309-3317. [PMID: 36625354 DOI: 10.1039/d2nr03047k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Culture-based diagnosis of bacterial diseases is a time-consuming technique that can lead not only to antibiotic resistance or bacterial mutation but also to fast-spreading diseases. Such mutations contribute to the fast deterioration of the patient's health and in some cases the death depending on the complexity of the infection. There is great interest in developing widely available molecular-level diagnostics that provide accurate and rapid diagnosis at the individual level and that do not require sophisticated analysis or expensive equipment. Here, we present a promising analytical approach to detect the presence of pathogenic bacteria based on their dynamic properties enhanced with nanoplasmonic biomarkers. These markers have shown greater photostability and biocompatibility compared to fluorescent markers and quantum dots, and serve as both a selective marker and an amplifying agent in optical biomedical detection. We show that a simple dark-field side- illumination technique can provide sufficiently high-contrast dynamic images of individual plasmonic nanoparticles attached to Escherichia coli (E. coli) for multiplex biodetection. Combined with numerical dynamic filtering, our proposed system shows great potential for the deployment of portable commercial devices for rapid diagnostic tests available to physicians in emergency departments, clinics and public hospitals as point-of-care devices.
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Affiliation(s)
- Jennyfer Zapata-Farfan
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
| | | | - Sergiy Patskovsky
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
| | - Michel Meunier
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
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25
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Investigation of the Fuzzy Complex between RSV Nucleoprotein and Phosphoprotein to Optimize an Inhibition Assay by Fluorescence Polarization. Int J Mol Sci 2022; 24:ijms24010569. [PMID: 36614009 PMCID: PMC9820559 DOI: 10.3390/ijms24010569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022] Open
Abstract
The interaction between Respiratory Syncytial Virus phosphoprotein P and nucleoprotein N is essential for the formation of the holo RSV polymerase that carries out replication. In vitro screening of antivirals targeting the N-P protein interaction requires a molecular interaction model, ideally consisting of a complex between N protein and a short peptide corresponding to the C-terminal tail of the P protein. However, the flexibility of C-terminal P peptides as well as their phosphorylation status play a role in binding and may bias the outcome of an inhibition assay. We therefore investigated binding affinities and dynamics of this interaction by testing two N protein constructs and P peptides of different lengths and composition, using nuclear magnetic resonance and fluorescence polarization (FP). We show that, although the last C-terminal Phe241 residue is the main determinant for anchoring P to N, only longer peptides afford sub-micromolar affinity, despite increasing mobility towards the N-terminus. We investigated competitive binding by peptides and small compounds, including molecules used as fluorescent labels in FP. Based on these results, we draw optimized parameters for a robust RSV N-P inhibition assay and validated this assay with the M76 molecule, which displays antiviral properties, for further screening of chemical libraries.
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26
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Tverdokhlebova A, Sterin I, Darie CC, Katz E, Smutok O. Stimulation-Inhibition of Protein Release from Alginate Hydrogels Using Electrochemically Generated Local pH Changes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:57408-57418. [PMID: 36516447 DOI: 10.1021/acsami.2c17914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The electrochemically controlled release of proteins was studied in a Ca2+-cross-linked alginate hydrogel deposited on an electrode surface. The electrochemical oxidation of ascorbate or reduction of O2 was achieved upon applying electrical potentials +0.6 or -0.8 V (vs Ag/AgCl/KCl 3 M), respectively, resulting in decreasing or increasing pH locally near an electrode surface. The obtained local acidic solution resulted in the protonation of carboxylic groups in the alginate hydrogel and, as a result, the formation of a hydrophobic shrunken hydrogel film. Conversely, the produced alkaline local environment resulted in a hydrophilic swollen hydrogel film. The release of the proteins was effectively inhibited from the shrunk hydrogel and activated from the swollen hydrogel film. Overall, the electrochemically produced local pH changes allowed control over the biomolecule release process. While the release inhibition by applying +0.6 V was always effective and could be maintained as long as the positive potential was applied, the release activation was different depending on the protein molecular size, being more effective for smaller species, and molecule charge, being more effective for negatively charged species. The repetitive change from the inhibited to stimulated state of the biomolecule release process was obtained upon cyclic application of oxidative and reductive potentials (+0.6 V ↔ -0.8 V). The alginate hydrogel film shrinking-swelling as well as the protein release process were studied and visualized using a confocal fluorescent microscope. In order to be observed, an external surface of the alginate film and the loaded protein molecules were labeled with different fluorescent dyes, which then produced colored fluorescent images under a confocal microscope.
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Affiliation(s)
- Anna Tverdokhlebova
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
| | - Ilya Sterin
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
| | - Costel C Darie
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
- Biochemistry & Proteomics Laboratories, Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
| | - Evgeny Katz
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
| | - Oleh Smutok
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, United States
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27
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Zhang J, Gabel D, Assaf KI, Nau WM. A Fluorescein-Substituted Perbrominated Dodecaborate Cluster as an Anchor Dye for Large Macrocyclic Hosts and Its Application in Indicator Displacement Assays. Org Lett 2022; 24:9184-9188. [PMID: 36507622 DOI: 10.1021/acs.orglett.2c03615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Perhalogenated boron clusters derived from B12Br122-, a superchaotropic dianion with a globular icosahedral shape, serve as inorganic cavity binders for cyclodextrins (CDs), in particular for large CDs (γ-CD and δ-CD), with high binding affinity (Ka > 106 M-1) in aqueous solution. This opens the door for applications of this anchoring moiety by linking it to organic residues, prominently fluorescent dyes. We report here the synthesis of a novel fluorescein-substituted perbrominated dodecaborate cluster by a copper(I)-catalyzed azide-alkyne click reaction. The formation of host-guest inclusion complexes between the dodecaborate-modified fluorescein dye and CDs can be readily followed by optical titrations, which afforded a binding constant of ∼1 × 104 M-1 with γ-CD; that is, the cluster functionalization allows binding of an otherwise nonbinding dye to the macrocycle ("anchor dye"). The formation of the 1:1 host-guest inclusion complex between the dye and γ-CD occurs over a broad range of pH values, which allows its application as a sensitive reporter pair according to the indicator displacement method, e.g., for drug detection. In addition, the substituted dye shows outer-wall binding to cucurbiturils through the dodecaborate moiety, leading to the formation of aggregates and significant fluorescence quenching of the dye.
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Affiliation(s)
- Jinling Zhang
- Jacobs University Bremen, School of Science, Campus Ring 1, 28759 Bremen, Germany
| | - Detlef Gabel
- Jacobs University Bremen, School of Science, Campus Ring 1, 28759 Bremen, Germany
| | - Khaleel I Assaf
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, 19117 Al-Salt, Jordan
| | - Werner M Nau
- Jacobs University Bremen, School of Science, Campus Ring 1, 28759 Bremen, Germany
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28
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Le Guern F, Gaucher A, Cosentino G, Lagune M, Haagsman HP, Roux AL, Prim D, Rottman M. Labeled TEMPO-Oxidized Mannan Differentiates Binding Profiles within the Collectin Families. Int J Mol Sci 2022; 23:ijms232416067. [PMID: 36555720 PMCID: PMC9786299 DOI: 10.3390/ijms232416067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/05/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Establishing the rapid and accurate diagnosis of sepsis is a key component to the improvement of clinical outcomes. The ability of analytical platforms to rapidly detect pathogen-associated molecular patterns (PAMP) in blood could provide a powerful host-independent biomarker of sepsis. A novel concept was investigated based on the idea that a pre-bound and fluorescent ligand could be released from lectins in contact with high-affinity ligands (such as PAMPs). To create fluorescent ligands with precise avidity, the kinetically followed TEMPO oxidation of yeast mannan and carbodiimide coupling were used. The chemical modifications led to decreases in avidity between mannan and human collectins, such as the mannan-binding lectin (MBL) and human surfactant protein D (SP-D), but not in porcine SP-D. Despite this effect, these fluorescent derivatives were captured by human lectins using highly concentrated solutions. The resulting fluorescent beads were exposed to different solutions, and the results showed that displacements occur in contact with higher affinity ligands, proving that two-stage competition processes can occur in collectin carbohydrate recognition mechanisms. Moreover, the fluorescence loss depends on the discrepancy between the respective avidities of the recognized ligand and the fluorescent mannan. Chemically modulated fluorescent ligands associated with a diversity of collectins may lead to the creation of diagnostic tools suitable for multiplex array assays and the identification of high-avidity ligands.
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Affiliation(s)
- Florent Le Guern
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 78035 Versailles, France
- Faculté de Médecine Simone Veil, Université de Versailles St Quentin, INSERM UMR U1173, 2 Avenue de la Source de la Bièvre, 78180 Montigny le Bretonneux, France
| | - Anne Gaucher
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - Gina Cosentino
- Faculté de Médecine Simone Veil, Université de Versailles St Quentin, INSERM UMR U1173, 2 Avenue de la Source de la Bièvre, 78180 Montigny le Bretonneux, France
| | - Marion Lagune
- Faculté de Médecine Simone Veil, Université de Versailles St Quentin, INSERM UMR U1173, 2 Avenue de la Source de la Bièvre, 78180 Montigny le Bretonneux, France
| | - Henk P. Haagsman
- Section Molecular Host Defence, Division Infectious Diseases & Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CS Utrecht, The Netherlands
| | - Anne-Laure Roux
- Hôpital Raymond Poincaré, AP-HP, GHU Paris Saclay, 104 Bd Poincaré, 92380 Garches, France
- Plateforme des Biomarqueurs Innovants, 104 Bd Poincaré, 92380 Garches, France
| | - Damien Prim
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - Martin Rottman
- Faculté de Médecine Simone Veil, Université de Versailles St Quentin, INSERM UMR U1173, 2 Avenue de la Source de la Bièvre, 78180 Montigny le Bretonneux, France
- Hôpital Raymond Poincaré, AP-HP, GHU Paris Saclay, 104 Bd Poincaré, 92380 Garches, France
- Plateforme des Biomarqueurs Innovants, 104 Bd Poincaré, 92380 Garches, France
- Correspondence:
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29
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Tomczyk MM, Minoshima M, Kikuchi K, Blacha-Grzechnik A, Starosolski Z, Bhavane R, Zalewski M, Kuźnik N. Hybrid, dual visible and near-infrared fluorescence emission of (6,5) single-walled carbon nanotubes modified with fluorescein through aryl diazonium salt chemistry. NANOTECHNOLOGY 2022; 34:055703. [PMID: 36278289 DOI: 10.1088/1361-6528/ac9c6a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The aryl diazonium salt chemistry offers enhancement of near-infrared (NIR) emission of single-walled carbon nanotubes (SWCNTs), although, the attachment of functional molecules which could bring hybrid properties through the process is underdeveloped. In this work, we utilize aryl diazonium salt of fluorescein to createsp3defects on (6,5) SWCNTs. We study the influence of pH on the grafting process identifying that pH 5-6 is necessary for a successful reaction. The fluorescein-modified (6,5) SWCNTs (F-(6,5) SWCNTs) exhibit red-shiftedE11* emission in the NIR region attributed to luminescentsp3defects, but also visible (Vis) fluorescence at 515 nm from surface-attached fluorescein molecules. The fluorescence in both Vis and NIR regions of F-(6,5) SWCNTs exhibit strong pH-dependency associated with the dissociation of fluorescein molecules with an indication of photoinduced-electron transfer quenching the Vis emission of fluorescein dianion. The F-(6,5) SWCNTs could potentially be used for dual-channel medical imaging as indicated by our preliminary experiments. We hope that our research will encourage new, bold modifications of SWCNTs with functional molecules introducing new, unique hybrid properties.
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Affiliation(s)
- Mateusz Michał Tomczyk
- Division of Chemistry, Silesian University of Technology, ul. M. Strzody 9, Gliwice, Poland
| | - Masafumi Minoshima
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kazuya Kikuchi
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Agata Blacha-Grzechnik
- Division of Chemistry, Silesian University of Technology, ul. M. Strzody 9, Gliwice, Poland
| | - Zbigniew Starosolski
- Texas Children's Hospital, 1102 Bates Street, Suite 850, Houston, TX 77030, United States of America
| | - Rohan Bhavane
- Texas Children's Hospital, 1102 Bates Street, Suite 850, Houston, TX 77030, United States of America
| | - Mariusz Zalewski
- Division of Chemistry, Silesian University of Technology, ul. M. Strzody 9, Gliwice, Poland
| | - Nikodem Kuźnik
- Division of Chemistry, Silesian University of Technology, ul. M. Strzody 9, Gliwice, Poland
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30
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Fauvel M, Trybala A, Tseluiko D, Starov VM, Bandulasena HCH. Foam-Based Electrophoretic Separation of Charged Dyes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13935-13942. [PMID: 36322953 PMCID: PMC9671044 DOI: 10.1021/acs.langmuir.2c02228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Electrophoretic separation of a fluorescent dye mixture, containing rhodamine B (RB) and fluorescein, in liquid foams stabilized by anionic, cationic, or non-ionic surfactants in water-glycerol mixtures was studied in a custom-designed foam separation device. The effects of the external electric field applied across the foam and the initial pH of the solution on the effectiveness of separation were also studied. The fluid motion due to electroosmosis and the resulting back pressure within the foam and local pH changes were found to be complex and affected the separation. Fluorescein dye molecules, which have a positive or negative charge depending on the solution pH, aggregated in the vicinity of an electrode, leaving a pure band of neutral dye RB. The effectiveness of the separation was quantified by the percentage width of the pure RB band, which was found to be between 29 and 42%. This study demonstrates the potential of liquid foam as a platform for electrophoretic separation.
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Affiliation(s)
- Matthieu Fauvel
- Department
of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
| | - Anna Trybala
- Department
of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
| | - Dmitri Tseluiko
- Department
of Mathematics, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
| | - Victor Mikhilovich Starov
- Department
of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
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31
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Csibra E, Stan GB. Absolute protein quantification using fluorescence measurements with FPCountR. Nat Commun 2022; 13:6600. [PMID: 36329019 PMCID: PMC9633595 DOI: 10.1038/s41467-022-34232-6] [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: 01/10/2022] [Accepted: 10/19/2022] [Indexed: 11/06/2022] Open
Abstract
This paper presents a generalisable method for the calibration of fluorescence readings on microplate readers, in order to convert arbitrary fluorescence units into absolute units. FPCountR relies on the generation of bespoke fluorescent protein (FP) calibrants, assays to determine protein concentration and activity, and a corresponding analytical workflow. We systematically characterise the assay protocols for accuracy, sensitivity and simplicity, and describe an 'ECmax' assay that outperforms the others and even enables accurate calibration without requiring the purification of FPs. To obtain cellular protein concentrations, we consider methods for the conversion of optical density to either cell counts or alternatively to cell volumes, as well as examining how cells can interfere with protein counting via fluorescence quenching, which we quantify and correct for the first time. Calibration across different instruments, disparate filter sets and mismatched gains is demonstrated to yield equivalent results. It also reveals that mCherry absorption at 600 nm does not confound cell density measurements unless expressed to over 100,000 proteins per cell. FPCountR is presented as pair of open access tools (protocol and R package) to enable the community to use this method, and ultimately to facilitate the quantitative characterisation of synthetic microbial circuits.
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Affiliation(s)
- Eszter Csibra
- grid.7445.20000 0001 2113 8111Department of Bioengineering, Imperial College Centre for Synthetic Biology (IC-CSynB), Imperial College London, London, SW7 2AY UK
| | - Guy-Bart Stan
- grid.7445.20000 0001 2113 8111Department of Bioengineering, Imperial College Centre for Synthetic Biology (IC-CSynB), Imperial College London, London, SW7 2AY UK
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32
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Zhang T, Wu S, Qin H, Wu H, Liu X, Li B, Zheng X. An Optically Controlled Virtual Microsensor for Biomarker Detection In Vivo. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205760. [PMID: 36074977 DOI: 10.1002/adma.202205760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Current technologies for the real-time analysis of biomarkers in vivo, such as needle-type microelectrodes and molecular imaging methods based on exogenous contrast agents, are still facing great challenges in either invasive detection or lack of active control of the imaging probes. In this study, by combining the design concepts of needle-type microelectrodes and the fluorescence imaging method, a new technique is developed for detecting biomarkers in vivo, named as "optically controlled virtual microsensor" (OCViM). OCViM is established by the organic integration of a specially shaped laser beam and fluorescent nanoprobe, which serve as the virtual handle and sensor tip, respectively. The laser beam can trap and manipulate the nanoprobe in a programmable manner, and meanwhile excite it to generate fluorescence emission for biosensing. On this basis, fully active control of the nanoprobe is achieved noninvasively in vivo, and multipoint detection can be realized at sub-micrometer resolution by shifting a nanoprobe among multiple positions. By using OCViM, the overexpression and heterogenous distribution of biomarkers in the thrombus is studied in living zebrafish, which is further utilized for the evaluation of antithrombotic drugs. OCViM may provide a powerful tool for the mechanism study of thrombus progression and the evaluation of antithrombotic drugs.
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Affiliation(s)
- Tiange Zhang
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Shuai Wu
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Haifeng Qin
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Huaying Wu
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Xiaoshuai Liu
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Baojun Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Xianchuang Zheng
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
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33
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Lapierre FM, Bolz I, Büchs J, Huber R. Developing a fluorometric urease activity microplate assay suitable for automated microbioreactor experiments. Front Bioeng Biotechnol 2022; 10:936759. [PMID: 36185447 PMCID: PMC9515450 DOI: 10.3389/fbioe.2022.936759] [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: 05/05/2022] [Accepted: 08/19/2022] [Indexed: 11/15/2022] Open
Abstract
Quantifying urease activity is an important task for Microbial Induced Calcite Precipitation research. A new urease activity microplate assay using a fluorescent pH indicator is presented. The method is also suitable for automated measurements during microbioreactor experiments. The assay reagent consists of the green fluorescent pH-indicator fluorescein, urea and a phosphate buffer. After sample addition, the microbial urease hydrolyses urea, which results in a pH and hence fluorescence increase. The fluorescence signal can be measured with a microplate reader or with the microbioreactor system BioLector, allowing for automated urease activity measurements during cultivation experiments. In both measurement systems, the fluorescence signal slope highly correlates with the urease activity measured offline with standard methods. Automated measurement is possible, as no sample preparation such as centrifugation or adjusting of the optical density is required. The assay was developed so that the culture samples turbidity, salinity or buffer concentration does not have a negative impact on the fluorescence signal. The assay allows for straightforward, non-hazardous, parallelized, cheap and reliable measurements, making research on ureolytic bacteria for Microbial Induced Calcite Precipitation more efficient. The assay could be adapted to other enzymes, which have a strong impact on the pH value.
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Affiliation(s)
- Frédéric M. Lapierre
- Munich University of Applied Sciences HM, Munich, Germany
- *Correspondence: Frédéric M. Lapierre, ; Robert Huber,
| | - Isabel Bolz
- Munich University of Applied Sciences HM, Munich, Germany
| | - Jochen Büchs
- Chair of Biochemical Engineering (AVT.BioVT), RWTH Aachen University, Aachen, Germany
| | - Robert Huber
- Munich University of Applied Sciences HM, Munich, Germany
- *Correspondence: Frédéric M. Lapierre, ; Robert Huber,
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34
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Sarageng K, Wongprom W, Noorith W, Lertsathitphong P, Crawford J, Nasongkla N, O'Mullane AP, Lertanantawong B. Using H 2O 2 as a green oxidant to produce fluorescent GaOOH nanomaterials from a liquid metal. Chem Commun (Camb) 2022; 58:10412-10415. [PMID: 36040125 DOI: 10.1039/d2cc02797f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a simple and rapid method for the synthesis of fluorescent gallium oxyhydroxide (GaOOH) nanoparticles from liquid Ga by a probe sonication method in the presence of H2O2 as an oxidant. The aspect ratio of the GaOOH nanoparticles is determined by the concentration of H2O2 and solution pH, as well as the probe energy and sonication time. Further surface modification with cyclodextrin to achieve biocompatibility for potential biomedical applications is reported where an example of cell uptake and fluorescence imaging is shown.
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Affiliation(s)
- Kanyarat Sarageng
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
| | - Wanpawee Wongprom
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
| | - Weesuda Noorith
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
| | - Panjaphong Lertsathitphong
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
| | - Jessica Crawford
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia
| | - Norased Nasongkla
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
| | - Anthony P O'Mullane
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia
| | - Benchaporn Lertanantawong
- Department of Engineering, Faculty of Biomedical Engineering, Mahidol University, Nakhon Pathom, Thailand.
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35
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Shedenkova MO, Stelmashook EV, Isaev NK. Toxic Effect of Zinc Ions Is Accompanied by Acidification of the Cytoplasm in Cultured Rat Cerebellar Granule Neurons. Bull Exp Biol Med 2022; 173:539-543. [DOI: 10.1007/s10517-022-05578-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Indexed: 10/14/2022]
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36
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Cho H, Lee S, Han MS. Investigation of a benzodiazaborine library to identify new pH-responsive fluorophores. Org Biomol Chem 2022; 20:4986-4992. [PMID: 35678608 DOI: 10.1039/d2ob00817c] [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
The detection of pH is important owing to its significance in various processes, such as clinical and industrial processes. Numerous fluorescent pH probes have been developed using a variety of fluorophores; however, most are only suitable for application in a narrow pH range (between 5 and 8) owing to the lack of diversity of the pH-sensitive units. Furthermore, probes suitable for sensing high pHs have rarely been studied despite the importance of reliable detection of high pH in various industrial processes. In this study, we prepared a benzodiazaborine (bDAB) library consisting of 238 different bDABs through combinatorial synthesis to investigate their suitability as fluorescent pH probes. Informed by the results of a fluorescence-based, high-throughput screening of the library, we identified four bDABs that exhibit promising pH-sensitive ratiometric fluorescence responses. Their pKas vary significantly, ranging from 7.29 to 12.44, indicating their suitability for the detection of basic pHs even in extremely basic environments (pH > 10). Furthermore, their fluorescence responses show high stability, anti-interference, and reversibility under various pH conditions.
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Affiliation(s)
- Hyungjin Cho
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Suji Lee
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
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37
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Kromer C, Schwibbert K, Gadicherla AK, Thiele D, Nirmalananthan-Budau N, Laux P, Resch-Genger U, Luch A, Tschiche HR. Monitoring and imaging pH in biofilms utilizing a fluorescent polymeric nanosensor. Sci Rep 2022; 12:9823. [PMID: 35701457 PMCID: PMC9197968 DOI: 10.1038/s41598-022-13518-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 05/25/2022] [Indexed: 01/12/2023] Open
Abstract
Biofilms are ubiquitous in nature and in the man-made environment. Given their harmful effects on human health, an in-depth understanding of biofilms and the monitoring of their formation and growth are important. Particularly relevant for many metabolic processes and survival strategies of biofilms is their extracellular pH. However, most conventional techniques are not suited for minimally invasive pH measurements of living biofilms. Here, a fluorescent nanosensor is presented for ratiometric measurements of pH in biofilms in the range of pH 4.5–9.5 using confocal laser scanning microscopy. The nanosensor consists of biocompatible polystyrene nanoparticles loaded with pH-inert dye Nile Red and is surface functionalized with a pH-responsive fluorescein dye. Its performance was validated by fluorometrically monitoring the time-dependent changes in pH in E. coli biofilms after glucose inoculation at 37 °C and 4 °C. This revealed a temperature-dependent decrease in pH over a 4-h period caused by the acidifying glucose metabolism of E. coli. These studies demonstrate the applicability of this nanosensor to characterize the chemical microenvironment in biofilms with fluorescence methods.
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Affiliation(s)
- Charlotte Kromer
- Division 75 "Product Materials and Nanotechnology", Department Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dorn-Str. 8-10, 10589, Berlin, Germany.,Institute of Pharmacy, Freie Universität Berlin, 14195, Berlin, Germany
| | - Karin Schwibbert
- Department Materials and the Environment, Federal Institute for Materials Research and Testing, 12205, Berlin, Germany
| | - Ashish K Gadicherla
- Department Biological Safety, German Federal Institute for Risk Assessment, 12277, Berlin, Germany
| | - Dorothea Thiele
- Department Materials and the Environment, Federal Institute for Materials Research and Testing, 12205, Berlin, Germany
| | - Nithiya Nirmalananthan-Budau
- Division 1.2 "Biophotonics", Department Analytical Chemistry, Reference Materials, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Str. 11, 12489, Berlin, Germany
| | - Peter Laux
- Division 75 "Product Materials and Nanotechnology", Department Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dorn-Str. 8-10, 10589, Berlin, Germany
| | - Ute Resch-Genger
- Division 1.2 "Biophotonics", Department Analytical Chemistry, Reference Materials, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Str. 11, 12489, Berlin, Germany.
| | - Andreas Luch
- Division 75 "Product Materials and Nanotechnology", Department Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dorn-Str. 8-10, 10589, Berlin, Germany.,Institute of Pharmacy, Freie Universität Berlin, 14195, Berlin, Germany
| | - Harald R Tschiche
- Division 75 "Product Materials and Nanotechnology", Department Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dorn-Str. 8-10, 10589, Berlin, Germany.
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38
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Function of Graphene Oxide as the “Nanoquencher” for Hg2+ Detection Using an Exonuclease I-Assisted Biosensor. Int J Mol Sci 2022; 23:ijms23116326. [PMID: 35683005 PMCID: PMC9180964 DOI: 10.3390/ijms23116326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 02/04/2023] Open
Abstract
Graphene oxide is well known for its excellent fluorescence quenching ability. In this study, positively charged graphene oxide (pGO25000) was developed as a fluorescence quencher that is water-soluble and synthesized by grafting polyetherimide onto graphene oxide nanosheets by a carbodiimide reaction. Compared to graphene oxide, the fluorescence quenching ability of pGO25000 is significantly improved by the increase in the affinity between pGO25000 and the DNA strand, which is introduced by the additional electrostatic interaction. The FAM-labeled single-stranded DNA probe can be almost completely quenched at concentrations of pGO25000 as low as 0.1 μg/mL. A simple and novel FAM-labeled single-stranded DNA sensor was designed for Hg2+ detection to take advantage of exonuclease I-triggered single-stranded DNA hydrolysis, and pGO25000 acted as a fluorescence quencher. The FAM-labeled single-stranded DNA probe is present as a hairpin structure by the formation of T–Hg2+–T when Hg2+ is present, and no fluorescence is observed. It is digested by exonuclease I without Hg2+, and fluorescence is recovered. The fluorescence intensity of the proposed biosensor was positively correlated with the Hg2+ concentration in the range of 0–250 nM (R2 = 0.9955), with a seasonable limit of detection (3σ) cal. 3.93 nM. It was successfully applied to real samples of pond water for Hg2+ detection, obtaining a recovery rate from 99.6% to 101.1%.
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39
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Rizzo R, Onesto V, Forciniti S, Chandra A, Prasad S, Iuele H, Colella F, Gigli G, Del Mercato LL. A pH-sensor scaffold for mapping spatiotemporal gradients in three-dimensional in vitro tumour models. Biosens Bioelectron 2022; 212:114401. [PMID: 35617754 DOI: 10.1016/j.bios.2022.114401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 11/28/2022]
Abstract
The detection of extracellular pH at single cell resolution is challenging and requires advanced sensibility. Sensing pH at high spatial and temporal resolution might provide crucial information in understanding the role of pH and its fluctuations in a wide range of physio-pathological cellular processes, including cancer. Here, a method to embed silica-based fluorescent pH sensors into alginate-based three-dimensional (3D) microgels tumour models, coupled with a computational method for fine data analysis, is presented. By means of confocal laser scanning microscopy, live-cell time-lapse imaging of 3D alginate microgels was performed and the extracellular pH metabolic variations were monitored in both in vitro 3D mono- and 3D co-cultures of tumour and stromal pancreatic cells. The results show that the extracellular pH is cell line-specific and time-dependent. Moreover, differences in pH were also detected between 3D monocultures versus 3D co-cultures, thus suggesting the existence of a metabolic crosstalk between tumour and stromal cells. In conclusion, the system has the potential to image multiple live cell types in a 3D environment and to decipher in real-time their pH metabolic interplay under controlled experimental conditions, thus being also a suitable platform for drug screening and personalized medicine.
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Affiliation(s)
- Riccardo Rizzo
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy.
| | - Valentina Onesto
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Stefania Forciniti
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Anil Chandra
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Saumya Prasad
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Helena Iuele
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Francesco Colella
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy
| | - Giuseppe Gigli
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy; Department of Mathematics and Physics ''Ennio De Giorgi", University of Salento, via Arnesano, 73100, Lecce, Italy
| | - Loretta L Del Mercato
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy.
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40
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Cui S, Qiao J, Xiong MP. Antibacterial and Biofilm-Eradicating Activities of pH-Responsive Vesicles against Pseudomonas aeruginosa. Mol Pharm 2022; 19:2406-2417. [PMID: 35507414 DOI: 10.1021/acs.molpharmaceut.2c00165] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The formation of biofilms by a microcolony of bacteria is a significant burden on the healthcare industry due to difficulty eradicating it. In this study, pH-responsive vesicles capable of releasing apramycin (APR), a model aminoglycoside antibiotic, in response to the low pH typical of establishedPseudomonas aeruginosa biofilms resulted in improved eradication of existing biofilms in comparison to the free drug. The amphiphilic polymeric vesicle (PV) comprised of block polymer poly (ethylene glycol)-block-poly 2-(dimethylamino) ethyl methacrylate (mPEG-b-pDEAEMA) averaged 128 nm. The drug encapsulation content of APR in PV/APR was confirmed to be 28.2%, and the drug encapsulation efficiency was confirmed to be 51.2%. At pH 5.5, PV/APR released >90% APR after 24 h compared to <20% at pH 7.4. At pH 5.5, protonation of the pDEAEMA block results in a zeta potential of +23 mV compared to a neutral zeta potential of +2.2 mV at pH 7.4. Confocal microscopy, flow cytometry, and scanning electron microscopy reveal that the positively charged vesicles can compromise the integrity of the planktonic bacterial membrane in a pH-dependent manner. In addition, PV/APR is able to diffuse into mature biofilms to release APR in the acidic milieu of biofilm bacteria, and PV/APR was more efficient at eliminating preexisting biofilms compared to free APR at 128 and 256 μg/mL. This study reveals that dynamic charge density in response to pH can lead to differential levels of interactions with the biofilm and bacterial membrane. This effectively results in enhanced antibacterial and antibiofilm properties against both planktonic and difficult-to-treat biofilm bacteria at concentrations significantly lower than those of the free drug. Overall, this pH-responsive vesicle could be especially promising for treating biofilm-associated infectious diseases.
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Affiliation(s)
- Shuolin Cui
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602-2352, United States
| | - Jing Qiao
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602-2352, United States.,Institute of Advanced Materials, School of Chemistry and Chemical Engineering, and, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing 211189, China
| | - May P Xiong
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602-2352, United States
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41
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Maspero M, Dallanoce C, Wängler B, Wängler C, Hübner R. The Exception that Proves the Rule: How Sodium Chelation Can Alter the Charge-Cell Binding Correlation of Fluorescein-Based Multimodal Imaging Agents. ChemMedChem 2022; 17:e202100739. [PMID: 35137522 PMCID: PMC9303573 DOI: 10.1002/cmdc.202100739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/07/2022] [Indexed: 11/10/2022]
Abstract
In the present study we describe and explain an aberrant behavior in terms of receptor binding profile of a fluorescein-based multimodal imaging agent for gastrin releasing peptide receptor (GRPR) visualization by elucidating a chelating mechanism on sodium ions of its fluorescent dye moiety. This hypothesis is supported by both biological results and spectroscopic analyses of different fluorescein-carrying conjugates and an equally charged set of analogous tartrazine-based GRPR-binding imaging agents. Fluorescein interacts with sodium which reduces the overall negative charge of the dye molecule by one. This reduction in apparent total net charge explains the exceptional behavior found for the fluorescein-based multimodal bioconjugate in the context of the charge-cell binding correlation hypothesis.
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Affiliation(s)
- Marco Maspero
- University of Milan, Department of Pharmaceutical Sciences, ITALY
| | - Clelia Dallanoce
- University of Milan, Department of Pharmaceutical Sciences, ITALY
| | - Björn Wängler
- University of Heidelberg: Ruprecht Karls Universitat Heidelberg, Medical Faculty Mannheim, GERMANY
| | - Carmen Wängler
- Medical Faculty Mannheim of Heidelberg University, Biomedical Chemistry, Department of Clinical Radiology and Nuclear Medicine, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, GERMANY
| | - Ralph Hübner
- University of Heidelberg: Ruprecht Karls Universitat Heidelberg, Medical Faculty Mannheim, GERMANY
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42
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Zhou Y, Mazur F, Liang K, Chandrawati R. Sensitivity and Selectivity Analysis of Fluorescent Probes for Hydrogen Sulfide Detection. Chem Asian J 2022; 17:e202101399. [PMID: 35018736 PMCID: PMC9306468 DOI: 10.1002/asia.202101399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/07/2022] [Indexed: 11/09/2022]
Abstract
Hydrogen sulfide (H2S) is a gasotransmitter known to regulate physiological and pathological processes. Abnormal H2S levels have been associated with a range of conditions, including Parkinson's and Alzheimer's diseases, cardiovascular and renal diseases, bacterial and viral infections, as well as cancer. Therefore, fast and sensitive H2S detection is of significant clinical importance. Fluorescent H2S probes hold great potential among the currently developed detection methods because of their high sensitivity, selectivity, and biocompatibility. However, many proposed probes do not provide a gold standard for proper use and selection. Consequently, issues arise when applying the probes in different conditions. Therefore, we systematically evaluated four commercially available probes (WSP‐1, WSP‐5, CAY, and P3), considering their detection range, sensitivity, selectivity, and performance in different environments. Furthermore, their capacity for endogenous H2S imaging in live cells was demonstrated.
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Affiliation(s)
- Yingzhu Zhou
- University of New South Wales - Kensington Campus: University of New South Wales, School of Chemical Engineering, AUSTRALIA
| | - Federico Mazur
- University of New South Wales - Kensington Campus: University of New South Wales, School of Chemical Engineering, AUSTRALIA
| | - Kang Liang
- University of New South Wales - Kensington Campus: University of New South Wales, School of Chemical Engineering, AUSTRALIA
| | - Rona Chandrawati
- University of New South Wales, Chemical Engineering, Science and Engineering Building E8, 2052, Sydney, AUSTRALIA
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43
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Lietard J, Ameur D, Somoza MM. Sequence-dependent quenching of fluorescein fluorescence on single-stranded and double-stranded DNA. RSC Adv 2022; 12:5629-5637. [PMID: 35425544 PMCID: PMC8982050 DOI: 10.1039/d2ra00534d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/10/2022] [Indexed: 02/01/2023] Open
Abstract
Fluorescein is commonly used to label macromolecules, particularly proteins and nucleic acids, but its fluorescence is known to be strongly dependent on its direct chemical environment.
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Affiliation(s)
- Jory Lietard
- Institute of Inorganic Chemistry, University of Vienna, Althanstraße 14, 1090 Vienna, Austria
| | - Dominik Ameur
- Institute of Inorganic Chemistry, University of Vienna, Althanstraße 14, 1090 Vienna, Austria
| | - Mark M. Somoza
- Institute of Inorganic Chemistry, University of Vienna, Althanstraße 14, 1090 Vienna, Austria
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, 85354 Freising, Germany
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Straße 34, 85354 Freising, Germany
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44
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Ponomareva D, Petukhova E, Bregestovski P. Simultaneous Monitoring of pH and Chloride (Cl -) in Brain Slices of Transgenic Mice. Int J Mol Sci 2021; 22:13601. [PMID: 34948398 PMCID: PMC8708776 DOI: 10.3390/ijms222413601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
Optosensorics is the direction of research possessing the possibility of non-invasive monitoring of the concentration of intracellular ions or activity of intracellular components using specific biosensors. In recent years, genetically encoded proteins have been used as effective optosensory means. These probes possess fluorophore groups capable of changing fluorescence when interacting with certain ions or molecules. For monitoring of intracellular concentrations of chloride ([Cl-]i) and hydrogen ([H+] i) the construct, called ClopHensor, which consists of a H+- and Cl--sensitive variant of the enhanced green fluorescent protein (E2GFP) fused with a monomeric red fluorescent protein (mDsRed) has been proposed. We recently developed a line of transgenic mice expressing ClopHensor in neurons and obtained the map of its expression in different areas of the brain. The purpose of this study was to examine the effectiveness of transgenic mice expressing ClopHensor for estimation of [H+]i and [Cl-]i concentrations in neurons of brain slices. We performed simultaneous monitoring of [H+]i and [Cl-]i under different experimental conditions including changing of external concentrations of ions (Ca2+, Cl-, K+, Na+) and synaptic stimulation of Shaffer's collaterals of hippocampal slices. The results obtained illuminate different pathways of regulation of Cl- and pH equilibrium in neurons and demonstrate that transgenic mice expressing ClopHensor represent a reliable tool for non-invasive simultaneous monitoring of intracellular Cl- and pH.
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Affiliation(s)
- Daria Ponomareva
- Institut de Neurosciences des Systèmes, Aix-Marseille University, INSERM, INS, 13005 Marseille, France;
- Institute of Neurosciences, Kazan State Medical University, 420111 Kazan, Russia;
- Department of Normal Physiology, Kazan State Medical University, 420111 Kazan, Russia
| | - Elena Petukhova
- Institute of Neurosciences, Kazan State Medical University, 420111 Kazan, Russia;
- Department of Normal Physiology, Kazan State Medical University, 420111 Kazan, Russia
| | - Piotr Bregestovski
- Institut de Neurosciences des Systèmes, Aix-Marseille University, INSERM, INS, 13005 Marseille, France;
- Institute of Neurosciences, Kazan State Medical University, 420111 Kazan, Russia;
- Department of Normal Physiology, Kazan State Medical University, 420111 Kazan, Russia
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45
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Colaruotolo LA, Peters E, Corradini MG. Novel luminescent techniques in aid of food quality, product development, and food processing. Curr Opin Food Sci 2021. [DOI: 10.1016/j.cofs.2021.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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The Cutting Edge of Disease Modeling: Synergy of Induced Pluripotent Stem Cell Technology and Genetically Encoded Biosensors. Biomedicines 2021; 9:biomedicines9080960. [PMID: 34440164 PMCID: PMC8392144 DOI: 10.3390/biomedicines9080960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 08/02/2021] [Indexed: 11/17/2022] Open
Abstract
The development of cell models of human diseases based on induced pluripotent stem cells (iPSCs) and a cell therapy approach based on differentiated iPSC derivatives has provided a powerful stimulus in modern biomedical research development. Moreover, it led to the creation of personalized regenerative medicine. Due to this, in the last decade, the pathological mechanisms of many monogenic diseases at the cell level have been revealed, and clinical trials of various cell products derived from iPSCs have begun. However, it is necessary to reach a qualitatively new level of research with cell models of diseases based on iPSCs for more efficient searching and testing of drugs. Biosensor technology has a great application prospect together with iPSCs. Biosensors enable researchers to monitor ions, molecules, enzyme activities, and channel conformation in live cells and use them in live imaging and drug screening. These probes facilitate the measurement of steady-state concentrations or activity levels and the observation and quantification of in vivo flux and kinetics. Real-time monitoring of drug action in a specific cellular compartment, organ, or tissue type; the ability to screen at the single-cell resolution; and the elimination of the false-positive results caused by low drug bioavailability that is not detected by in vitro testing methods are a few of the benefits of using biosensors in drug screening. Here, we discuss the possibilities of using biosensor technology in combination with cell models based on human iPSCs and gene editing systems. Furthermore, we focus on the current achievements and problems of using these methods.
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47
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An Active Surface Preservation Strategy for the Rational Development of Carbon Dots as pH-Responsive Fluorescent Nanosensors. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9080191] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Here we report the rational development of a carbon dot (CDs)-based fluorescent pH nanosensor by employing an active surface preservation strategy. More specifically, citric acid, urea and fluorescein were subjected to a one-pot hydrothermal treatment, which preserved fluorescein-like structures on the surface of the CDs. The obtained CDs showed pH-sensitive green emission, which can be used to determine pH variations from 3.7 to 12.1 by fluorescence enhancement. Moreover, the obtained nanoparticles showed excellent selectivity toward pH, fluorescence reversibility in different pH values, photostability, while being compatible with human cell lines (even at high concentrations). Furthermore, their performance as pH sensors was comparable with reference pH determination procedures. Thus, an active surface preservation strategy was successfully employed to develop fluorescence pH nanosensors in a rational manner and without post-synthesis functionalization strategies, which show potential for future use in pH determination.
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48
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Cetin S, Elmazoglu Z, Karaman O, Gunduz H, Gunbas G, Kolemen S. Balanced Intersystem Crossing in Iodinated Silicon-Fluoresceins Allows New Class of Red Shifted Theranostic Agents. ACS Med Chem Lett 2021; 12:752-757. [PMID: 34055222 PMCID: PMC8155232 DOI: 10.1021/acsmedchemlett.1c00018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 02/22/2021] [Indexed: 12/12/2022] Open
Abstract
Iodination of the silicon-fluorescein core revealed a new class of highly cytotoxic, red-shifted and water-soluble photosensitizer (SF-I) which is also fairly emissive to serve as a theranostic agent. Singlet oxygen generation capacity of SF-I was evaluated chemically, and up to 45% singlet oxygen quantum yield was reported in aqueous solutions. SF-I was further tested in triple negative breast (MDA MB-231) and colon (HCT-116) cancer cell lines, which are known to have limited chemotherapy options as well as very poor prognosis. SF-I induced efficient singlet oxygen generation and consequent photocytotoxicity in both cell lines upon light irradiation with a negligible dark toxicity while allowing cell imaging at the same time. SF-I marks the first ever example of a silicon xanthene-based photosensitizer and holds a lot of promise as a small-molecule-based theranostic scaffold.
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Affiliation(s)
- Sultan Cetin
- Department
of Chemistry, Koc University, Rumelifeneri Yolu, 34450 Istanbul, Turkey
| | - Zubeyir Elmazoglu
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Osman Karaman
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Hande Gunduz
- Department
of Chemistry, Koc University, Rumelifeneri Yolu, 34450 Istanbul, Turkey
| | - Gorkem Gunbas
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Safacan Kolemen
- Department
of Chemistry, Koc University, Rumelifeneri Yolu, 34450 Istanbul, Turkey
- Surface
Science and Technology Center (KUYTAM), Koc University, 34450 Istanbul, Turkey
- Boron
and Advanced Materials Application and Research Center, Koc University, 34450 Istanbul, Turkey
- TUPRAS
Energy Center (KUTEM), Koc University, 34450 Istanbul, Turkey
| |
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