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Adebayo MA, Kolawole AN, Falese BA, Kolawole AO. Spectroscopic and in silico evaluation of hesperetin, aglycone flavanone, as a prospective regulatory ligand for human salivary α-amylase. J Biomol Struct Dyn 2024; 42:3177-3192. [PMID: 37382217 DOI: 10.1080/07391102.2023.2225621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 05/01/2023] [Indexed: 06/30/2023]
Abstract
The insight into the binding mechanism of hesperetin, an aglycone flavanone, with human salivary α-amylase (HSAA), simulated under physiological salivary condition, was explored using various spectroscopic approaches and in silico method. Hesperetin effectively quenched the intrinsic fluorescence of HSAA and the quenching was mixed quenching mechanism. The interaction perturbed the HSAA intrinsic fluorophore microenvironment and the enzyme global surface hydrophobicity. The negative values of ΔG for thermodynamic parameters and in silico study revealed the spontaneity of HSAA-hesperetin complex while the positive values of enthalpy change (ΔH) and entropy change (ΔS) showed noticeable involvement of hydrophobic bonding in the stabilization of the complex. Hesperetin was a mixed inhibitor for HSAA with a KI of 44.60 ± 1.63 μM and having apparent inhibition coefficient (α) of 0.26. Macromolecular crowding, given rise to microviscosity and anomalous diffusion, regulated the interaction. Sodium ion (Na+) created high ionic strength, also, modulated the interaction. The in silico study proposed the preferential binding of hesperetin at the active cleft domain of HSAA with the least energy of -8.0 kcal/mol. This work gives a novel insight on the potentials of hesperetin as a future prospective medicinal candidate in the management of postprandial hyperglycemic condition.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Masaudat A Adebayo
- Department of Science Laboratory Technology (Biochemistry Option), School of Science and Technology, Federal Polytechnic, Ede, Osun State, Nigeria
| | - Adejoke N Kolawole
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
| | - Babatunde A Falese
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
| | - Ayodele O Kolawole
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
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Lundberg AT, Hathcock T, Kennis RA, White AG. In vitro evaluation of bactericidal effects of fluorescent light energy on Staphylococcus pseudintermedius and S. aureus. Vet Dermatol 2024; 35:166-174. [PMID: 38177510 DOI: 10.1111/vde.13235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 11/02/2023] [Accepted: 12/16/2023] [Indexed: 01/06/2024]
Abstract
BACKGROUND Staphylococcus pseudintermedius and S. aureus are bacterial species of importance in veterinary medicine. The increasing incidence of antibiotic resistance necessitates the implementation of novel treatment modalities. Fluorescent light energy (FLE) is used as an adjunctive and primary treatment for canine pyoderma. However, no in vitro studies exist investigating its bactericidal effects against S. pseudintermedius or S. aureus. OBJECTIVES To determine the bactericidal effects of FLE on S. pseudintermedius and S. aureus isolates. MATERIALS AND METHODS Two meticillin-susceptible S. pseudintermedius (MSSP) isolates, three meticillin-resistant S. pseudintermedius (MRSP) isolates and one meticillin-resistant S. aureus (MRSA) isolate were studied. A commercially available blue light-emitting diode (bLED) lamp and photoconverting hydrogel FLE system was used. All bacteria were exposed to five conditions following inoculation: (i) no treatment (control); (ii) blue light (bLED) once; (iii) bLED twice consecutively; (iv) FLE (bLED and photoconverting hydrogel) once; and (v) FLE (bLED and photoconverting hydrogel) twice consecutively. Each individual exposure was 2 min long. RESULTS No statistically significant differences (p < 0.05) were found for any treatment group when each bacterial isolate was evaluated individually, MSSP isolates were grouped, MRSP isolates were grouped, when all S. pseudintermedius isolates were combined, or when all isolates of both Staphylococcus species were combined. CONCLUSIONS AND CLINICAL RELEVANCE While clinical success is reported when using FLE to treat Staphylococcus infections in animals, no in vitro antibacterial efficacy was identified for S. pseudintermedius or S. aureus under experimental conditions. The clinical success observed with FLE may be the result of a more complex in vivo response.
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Affiliation(s)
- Annette T Lundberg
- College of Veterinary Medicine, Department of Clinical Sciences, Auburn University, Auburn, Alabama, USA
| | - Terri Hathcock
- College of Veterinary Medicine, Department of Pathobiology, Auburn University, Auburn, Alabama, USA
| | - Robert A Kennis
- College of Veterinary Medicine, Department of Clinical Sciences, Auburn University, Auburn, Alabama, USA
| | - Amelia G White
- College of Veterinary Medicine, Department of Clinical Sciences, Auburn University, Auburn, Alabama, USA
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Si Q, Li Y, Huang Z, Liu C, Jiao T, Chen Q, Chen X, Chen Q, Wei J. Isothermal Reciprocal Catalytic DNA Circuit for Sensitive Analysis of Kanamycin. J Agric Food Chem 2024; 72:6754-6761. [PMID: 38470333 DOI: 10.1021/acs.jafc.4c00261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Inappropriate use of veterinary drugs can result in the presence of antibiotic residues in animal-derived foods, which is a threat to human health. A simple yet efficient antibiotic-sensing method is highly desirable. Programmable DNA amplification circuits have supplemented robust toolkits for food contaminants monitoring. However, they currently face limitations in terms of their intricate design and low signal gain. Herein, we have engineered a robust reciprocal catalytic DNA (RCD) circuit for highly efficient bioanalysis. The trigger initiates the cascade hybridization reaction (CHR) to yield plenty of repeated initiators for activating the rolling circle amplification (RCA) circuit. Then the RCA-generated numerous reconstituted triggers can reversely stimulate the CHR circuit. This results in a self-sufficient supply of numerous initiators and triggers for the successive cross-invasion of CHR and RCA amplifiers, thus leading to exponential signal amplification for the highly efficient detection of analytes. With its flexible programmability and modular features, the RCD amplifier can serve as a universal toolbox for the high-performance and accurate sensing of kanamycin in buffer and food samples including milk, honey, and fish, highlighting its enormous promise for low-abundance contaminant analysis in foodstuffs.
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Affiliation(s)
- Qingyang Si
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Yumeng Li
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Ziling Huang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Chuanyi Liu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Tianhui Jiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Qingmin Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Xiaomei Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Quansheng Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Jie Wei
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
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d'Udekem d'Acoz O, Hue F, Ye T, Wang L, Leroux M, Rajngewerc L, Tran T, Phan K, Ramirez MS, Reisner W, Tolmasky ME, Reyes-Lamothe R. Dynamics and quantitative contribution of the aminoglycoside 6'- N-acetyltransferase type Ib to amikacin resistance. mSphere 2024; 9:e0078923. [PMID: 38353533 DOI: 10.1128/msphere.00789-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 01/09/2024] [Indexed: 02/27/2024] Open
Abstract
Aminoglycosides are essential components in the available armamentarium to treat bacterial infections. The surge and rapid dissemination of resistance genes strongly reduce their efficiency, compromising public health. Among the multitude of modifying enzymes that confer resistance to aminoglycosides, the aminoglycoside 6'-N-acetyltransferase type Ib [AAC(6')-Ib] is the most prevalent and relevant in the clinical setting as it can inactivate numerous aminoglycosides, such as amikacin. Although the mechanism of action, structure, and biochemical properties of the AAC(6')-Ib protein have been extensively studied, the contribution of the intracellular milieu to its activity remains unclear. In this work, we used a fluorescent-based system to quantify the number of AAC(6')-Ib per cell in Escherichia coli, and we modulated this copy number with the CRISPR interference method. These tools were then used to correlate enzyme concentrations with amikacin resistance levels. Our results show that resistance to amikacin increases linearly with a higher concentration of AAC(6')-Ib until it reaches a plateau at a specific protein concentration. In vivo imaging of this protein shows that it diffuses freely within the cytoplasm of the cell, but it tends to form inclusion bodies at higher concentrations in rich culture media. Addition of a chelating agent completely dissolves these aggregates and partially prevents the plateau in the resistance level, suggesting that AAC(6')-Ib aggregation lowers resistance to amikacin. These results provide the first step in understanding the cellular impact of each AAC(6')-Ib molecule on aminoglycoside resistance. They also highlight the importance of studying its dynamic behavior within the cell.IMPORTANCEAntibiotic resistance is a growing threat to human health. Understanding antibiotic resistance mechanisms can serve as foundation for developing innovative treatment strategies to counter this threat. While numerous studies clarified the genetics and dissemination of resistance genes and explored biochemical and structural features of resistance enzymes, their molecular dynamics and individual contribution to resistance within the cellular context remain unknown. Here, we examined this relationship modulating expression levels of aminoglycoside 6'-N-acetyltransferase type Ib, an enzyme of clinical relevance. We show a linear correlation between copy number of the enzyme per cell and amikacin resistance levels up to a threshold where resistance plateaus. We propose that at concentrations below the threshold, the enzyme diffuses freely in the cytoplasm but aggregates at the cell poles at concentrations over the threshold. This research opens promising avenues for studying enzyme solubility's impact on resistance, creating opportunities for future approaches to counter resistance.
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Affiliation(s)
| | - Fong Hue
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
| | - Tianyi Ye
- Department of Biology, McGill University, Montréal, Québec, Canada
| | - Louise Wang
- Department of Biology, McGill University, Montréal, Québec, Canada
| | - Maxime Leroux
- Department of Biology, McGill University, Montréal, Québec, Canada
| | - Lucila Rajngewerc
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
| | - Tung Tran
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
| | - Kimberly Phan
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
| | - Maria S Ramirez
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
| | - Walter Reisner
- Department of Physics, McGill University, Montréal, Québec, Canada
| | - Marcelo E Tolmasky
- Center for Applied Biotechnology Studies, California State University Fullerton, Fullerton, California, USA
- Department of Biological Science, California State University Fullerton, Fullerton, California, USA
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Nakamura M, Kanetani I, Gon M, Tanaka K. NIR-II Absorption/ Fluorescence of D-A π-Conjugated Polymers Composed of Strong Electron Acceptors Based on Boron-Fused Azobenzene Complexes. Angew Chem Int Ed Engl 2024:e202404178. [PMID: 38525914 DOI: 10.1002/anie.202404178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 03/26/2024]
Abstract
Luminescence in the second near-infrared (NIR-II, 1,000-1,700 nm) window is beneficial especially for deep tissue imaging and optical sensors because of intrinsic high permeability through various media. Strong electron-acceptors with low-lying lowest unoccupied molecular orbital (LUMO) energy levels are a crucial unit for donor-acceptor (D-A) π-conjugated polymers (CPs) with the NIR-II emission property, however, limited kinds of molecular skeletons are still available. Herein, D-A CPs involving fluorinated boron-fused azobenzene complexes (BAz) with enhanced electron-accepting properties are reported. Combination of fluorination at the azobenzene ligand and trifluoromethylation at the boron can effectively lower the LUMO energy level down to -4.42 eV, which is much lower than those of conventional strong electron-acceptors. The synthesized series of CPs showed excellent absorption/fluorescence property in solution over a wide NIR range including NIR-II. Furthermore, owing to the inherent solid-state emissive property of the BAz skeleton, obvious NIR-II fluorescence from the film (up to λFL = 1213 nm) and the nanoparticle in water (λFL = 1036 nm, brightness = up to 29 cm-1 M-1) were observed, proposing that our materials are applicable for developing next-generation of NIR-II luminescent materials.
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Affiliation(s)
- Masashi Nakamura
- Kyoto University: Kyoto Daigaku, Polymer chemistry, Katsura, Nishikyo-ku, 615-8510, Kyoto, JAPAN
| | - Ippei Kanetani
- Kyoto University, Department of Polymer Chemistry, JAPAN
| | - Masayuki Gon
- Kyoto University, Department of Polymer Chemistry, JAPAN
| | - Kazuo Tanaka
- Kyoto University, Graduate School of Engineering, Department of Polymer Chemistry, Katsura, Nishikyo-ku, 615-8510, Kyoto, JAPAN
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Mehl BP, Vairaprakash P, Li L, Hinde E, MacNevin CJ, Hsu CW, Gratton E, Liu B, Hahn KM. Live-cell biosensors based on the fluorescence lifetime of environment-sensing dyes. Cell Rep Methods 2024; 4:100734. [PMID: 38503289 DOI: 10.1016/j.crmeth.2024.100734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/13/2023] [Accepted: 02/26/2024] [Indexed: 03/21/2024]
Abstract
In this work, we examine the use of environment-sensitive fluorescent dyes in fluorescence lifetime imaging microscopy (FLIM) biosensors. We screened merocyanine dyes to find an optimal combination of environment-induced lifetime changes, photostability, and brightness at wavelengths suitable for live-cell imaging. FLIM was used to monitor a biosensor reporting conformational changes of endogenous Cdc42 in living cells. The ability to quantify activity using phasor analysis of a single fluorophore (e.g., rather than ratio imaging) eliminated potential artifacts. We leveraged these properties to determine specific concentrations of activated Cdc42 across the cell.
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Affiliation(s)
- Brian P Mehl
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Pothiappan Vairaprakash
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Li Li
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Elizabeth Hinde
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California at Irvine, Irvine, CA 92617, USA
| | - Christopher J MacNevin
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Chia-Wen Hsu
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California at Irvine, Irvine, CA 92617, USA
| | - Bei Liu
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Klaus M Hahn
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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Klingstedt T, Lantz L, Shirani H, Ge J, Hanrieder J, Vidal R, Ghetti B, Nilsson KPR. Thiophene-Based Ligands for Specific Assignment of Distinct Aβ Pathologies in Alzheimer's Disease. ACS Chem Neurosci 2024. [PMID: 38523263 DOI: 10.1021/acschemneuro.4c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
Aggregated species of amyloid-β (Aβ) are one of the pathological hallmarks in Alzheimer's disease (AD), and ligands that selectively target different Aβ deposits are of great interest. In this study, fluorescent thiophene-based ligands have been used to illustrate the features of different types of Aβ deposits found in AD brain tissue. A dual-staining protocol based on two ligands, HS-276 and LL-1, with different photophysical and binding properties, was developed and applied on brain tissue sections from patients affected by sporadic AD or familial AD associated with the PSEN1 A431E mutation. When binding to Aβ deposits, the ligands could easily be distinguished for their different fluorescence, and distinct staining patterns were revealed for these two types of AD. In sporadic AD, HS-276 consistently labeled all immunopositive Aβ plaques, whereas LL-1 mainly stained cored and neuritic Aβ deposits. In the PSEN1 A431E cases, each ligand was binding to specific types of Aβ plaques. The ligand-labeled Aβ deposits were localized in distinct cortical layers, and a laminar staining pattern could be seen. Biochemical characterization of the Aβ aggregates in the individual layers also showed that the variation of ligand binding properties was associated with certain Aβ peptide signatures. For the PSEN1 A431E cases, it was concluded that LL-1 was binding to cotton wool plaques, whereas HS-276 mainly stained diffuse Aβ deposits. Overall, our findings showed that a combination of ligands was essential to identify distinct aggregated Aβ species associated with different forms of AD.
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Affiliation(s)
- Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | - Linda Lantz
- Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | - Hamid Shirani
- Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | - Junyue Ge
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Mölndal Hospital, Mölndal 431 80, Sweden
| | - Jörg Hanrieder
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Mölndal Hospital, Mölndal 431 80, Sweden
- Department of Neurodegenerative Diseases, University College London Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
| | - Ruben Vidal
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
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Khanolkar B, Shende P. BSA nanoclusters-based sensor for detection of dopamine in schizophrenia from biofluids. Drug Dev Ind Pharm 2024:1-13. [PMID: 38470160 DOI: 10.1080/03639045.2024.2328722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 03/05/2024] [Indexed: 03/13/2024]
Abstract
OBJECTIVE To develop nontoxic and stable fluorescent emission B-Cu nanoclusters (NCs) for the specific detection of dopamine at low concentrations in cerebrospinal fluid (CSF). SIGNIFICANCE Fluorescent gold and copper NCs conjugated with proteins, such as bovine serum albumin (BSA), offer photostability and healthcare potential. This study focused on fabricating B-Cu NCs that exhibited superior characteristics for sensitive dopamine detection. METHODS The study employed various instrumental techniques including attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), spectrofluorometry, and transmission electron microscopy (TEM) to characterize the formulated B-Cu NCs. The NCs were synthesized, resulting in particle size ∼300 nm. The highest observed fluorescence was recorded at 24542.81 relative fluorescence units (RFU). RESULTS The introduction of dopamine at concentrations of 0.1, 0.2, 0.3, and 0.4 ng/mL led to decreased fluorescence in both B-Au and B-Cu NCs due to an electron transport system. This reduction in fluorescence allowed dopamine concentration analysis in phosphate buffer and biological fluids such as blood plasma and CSF. B-Cu NCs showed potential as a biosensing system for point-of-care (POC) applications, specifically for diagnosing schizophrenia. CONCLUSION The study successfully synthesized stable and nontoxic B-Cu NCs with enhanced fluorescent emission properties. These NCs exhibited the capacity to detect dopamine at low concentrations in CSF. The study's findings hold promise for future applications, particularly in the development of a B-Cu NCs-based biosensing system for convenient POC detection of schizophrenia by both patients and clinicians. The potential impact of this technology on healthcare and biomedical fields is substantial.
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Affiliation(s)
- Bhakti Khanolkar
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM'S NMIMS, Mumbai, India
| | - Pravin Shende
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM'S NMIMS, Mumbai, India
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Carranza ME, Elero HM, Hernández PJP, Veglia AV. Calixarenes and cyclodextrins as off- and on- fluorescence probes for carbazole. Methods Appl Fluoresc 2024; 12:025005. [PMID: 38467069 DOI: 10.1088/2050-6120/ad326d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 03/11/2024] [Indexed: 03/13/2024]
Abstract
Absorption and fluorescence spectra of the nitrogen polycyclic aromatic hydrocarbon carbazole (CZL) were analyzed with native cyclodextrins (CD;α,β,γ); derivatizedCD(hydroxypropyl-β-cyclodextrin,HPCD; methyl-β-cyclodextrin,MeCD) and p-sulfonated calixarenes (SCAn, with n = 6 and 8) macrocycles. The results showed a slight increase in the absorbance ofCZLwithCD, but the mixture ofCZLwithSCAshowed lower absorption than the sum of the individual spectra. Also, changes in fluorescence were observed by adding the macrocycles, quenching withSCA, and significant increases withCD. The higher fluorescence enhancement was withHPCDrationalized as a complex formation with 1:1 stoichiometry, with an average value for the association constant (KA) of (12 ± 1) x 102M-1, and a quantum yield ratio between the complexedCZLand freeCZL(ΦCZL-HPCD/ΦCZL) of (1.56 ± 0.02) at neutral pH and 25.0 °C. These increases in fluorescence were used as an on-fluorescence switch to develop a supramolecular analytical method forCZLin aqueous samples. The best analytical parameters were inHPCD(LOD = 1.41 ± 0.01 ng mL-1). The method was validated in aqueous samples of river and tap water with recoveries between 96%-104%. The proposed supramolecular method is quick, direct, selective and represents an alternative and low-cost analysis method.
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Affiliation(s)
- Matías E Carranza
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Química Orgánica. Haya de la Torre y Medina Allende s/n, X5000HUA, Ciudad Universitaria, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), INFIQC, Córdoba, Argentina
| | - Hugo M Elero
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Química Orgánica. Haya de la Torre y Medina Allende s/n, X5000HUA, Ciudad Universitaria, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), INFIQC, Córdoba, Argentina
| | - Pedro J Peña Hernández
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Química Orgánica. Haya de la Torre y Medina Allende s/n, X5000HUA, Ciudad Universitaria, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), INFIQC, Córdoba, Argentina
| | - Alicia V Veglia
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Química Orgánica. Haya de la Torre y Medina Allende s/n, X5000HUA, Ciudad Universitaria, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), INFIQC, Córdoba, Argentina
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Yi Z, Xiao S, Kang X, Long F, Zhu A. Bifunctional MOF-Encapsulated Cobalt-Doped Carbon Dots Nanozyme-Powered Chemiluminescence/ Fluorescence Dual-Mode Detection of Aflatoxin B1. ACS Appl Mater Interfaces 2024. [PMID: 38507690 DOI: 10.1021/acsami.4c00560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
A novel bifunctional MOF-encapsulated cobalt-doped carbon dots nanozyme (Co-CD/PMOF) with excellent peroxidase-mimic catalytic activity and fluorescence property was synthesized and employed to fabricate a chemiluminescence/fluorescence (CL/FL) dual-mode immunosensor for AFB1 detection. Co-CD/PMOF could catalyze the luminol/H2O2 system to generate robust and long-lasting CL signals due to the slow diffusion effect and continuous generation of •OH, O2•-, and 1O2 species. Differing from traditional flash-type CL emissions, this glow-type CL emission is helpful to fabricate a sensitive and accurate CL sensing platform. Then the CL/FL dual-mode detection of AFB1 was developed using antibody-functionalized Co-CD/PMOF as the signal-amplifying nanoprobe. The CL mode assay based on indirect competitive immune principle was carried out on a chemiluminescence optical fiber platform, where the AFB1-OVA-functionalized optical fiber probe was employed for biorecognition, separation, and signal conducting. The AFB1 detection range and LOD were 0.63-69.36 ng/mL and 0.217 ng/mL, respectively. Using AFB1 antibody-functionalized immunomagnetic beads for capturing and separation, the FL mode detection of AFB1 was established based on the sandwich immune principle. A linear range of 0.54-51.91 ng/mL and a LOD of 0.027 ng/mL were obtained. This work designed a sensitive, rapid, and reliable nanozyme-powered dual-mode assay strategy and provided technical support in the field of environmental monitoring and food safety.
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Affiliation(s)
- Zhihao Yi
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Shuang Xiao
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Xinzheng Kang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Feng Long
- College of Environment and Natural Resource, Renmin University of China, Beijing 100872, China
| | - Anna Zhu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
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Easson MW, Jordan JH, Edwards JV, Prevost NT, Dupre RA, Hillyer MB, Lima IM, Nam S. Assessment of Cellulose Nanofiber-Based Elastase Biosensors to Inflammatory Disease as a Function of Spacer Length and Fluorescence Response. ACS Appl Bio Mater 2024; 7:1490-1500. [PMID: 38377436 PMCID: PMC10951950 DOI: 10.1021/acsabm.3c00885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/11/2023] [Accepted: 01/23/2024] [Indexed: 02/22/2024]
Abstract
Inflammatory disease biomarker detection has become a high priority in point-of-care diagnostic research in relation to chronic wounds, with a variety of sensor-based designs becoming available. Herein, two primary aspects of biosensor design are examined: (1) assessment of a cellulose nanofiber (CNF) matrix derived from cotton ginning byproducts as a sensor transducer surface; and (2) assessment of the relation of spacer length and morphology between the CNF cellulose backbone and peptide fluorophore as a function of sensor activity for porcine pancreatic and human neutrophil elastases. X-ray crystallography, specific surface area, and pore size analyses confirmed the suitability of CNF as a matrix for wound care diagnostics. Based upon the normalized degree of substitution, a pegylated-linker connecting CNF transducer substrate to peptide fluorophore showed the greatest fluorescence response, compared to short- and long-chain alkylated linkers.
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Affiliation(s)
- Michael W. Easson
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - Jacobs H. Jordan
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - J. Vincent Edwards
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - Nicolette T. Prevost
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - Rebecca A. Dupre
- Oak
Ridge Institute for Science and Education, U.S. Department of Energy, 1299 Bethel Valley Rd, Oak
Ridge, Tennessee 37831, United States
| | - Matthew B. Hillyer
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - Isabel M. Lima
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
| | - Sunghyun Nam
- US
Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Allen Toussaint Blvd, New Orleans, Louisiana 70124, United States
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12
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Mondal P, Roy S, Dey J, Dasgupta SB. Impact of Linker Groups on Self-Assembly, Gene Transfection, Antibacterial Activity, and In Vitro Cytotoxicity of Cationic Bolaamphiphiles. ACS Appl Bio Mater 2024; 7:1703-1712. [PMID: 38433388 DOI: 10.1021/acsabm.3c01142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Cationic bolaamphiphiles have gained significant attention in various research fields, including materials science, drug delivery, and gene therapy, due to their unique properties and potential applications. The objective of the current research is to develop more effective cationic bolaamphiphiles. Thus, we have designed and synthesized two cationic bolaamphiphiles (-(CH2)12(2,3-dihydroxy-N,N-dimethyl-N-(3-ureidopropyl)propan-1-aminium chloride))2 (C12(DDUPPAC)2)) and (-(CH2)12(N-(3-(carbamoyloxy)propyl)-2,3-dihydroxy-N,N-dimethylpropan-1-aminium chloride)2 (C12(CPDDPAC)2) containing urea and urethane linkages, respectively. We have investigated their self-assembly properties in water using several techniques, including surface tension, electrical conductivity, fluorescence probe, calorimetry, dynamic light scattering, and atomic force microscopy. Their biological applications, e.g., in vitro gene transfection, antibacterial activity, and cytotoxicity, were studied. Both bolaamphiphiles were observed to produce aggregates larger than spherical micelles above a relatively low critical aggregation concentration (cac). The calorimetric experiments suggested the thermodynamically favorable spontaneous aggregation of both bolaforms in water. The results of interaction studies led to the conclusion that C12(CPDDPAC)2 binds DNA with a greater affinity than C12(DDUPPAC)2. Also, C12(CPDDPAC)2 is found to act as a more efficient gene transfection vector than C12(DDUPPAC)2 in 264.7 cell lines. The in vitro cytotoxicity assay using MTT, however, revealed that neither of the bolaamphiphiles was toxic, even at higher quantities. Additionally, both bolaforms show beneficial antibacterial activity.
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Affiliation(s)
- Pabitra Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sadhana Roy
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Joykrishna Dey
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Somdeb Bose Dasgupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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13
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Berry SN, Zou M, Nguyen SL, Sajowitz AE, Qin L, Lewis W, Jolliffe K. Supramolecular Control of the Temperature Responsiveness of Fluorescent Macrocyclic Molecular Rotamers. Chemistry 2024:e202400504. [PMID: 38499467 DOI: 10.1002/chem.202400504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 03/20/2024]
Abstract
To fully harness the potential of molecular machines, it is crucial to develop methods by which to exert control over their speed of motion through the application of external stimuli. A conformationally strained macrocyclic fluorescent rotamer, CarROT, displays a reproducible and linear fluorescence decrease towards temperature over the physiological temperature range. Through the external addition of anions, cations or through deprotonation, the compound can access four discreet rotational speeds via supramolecular interactions (very slow, slow, fast and very fast) which in turn stop, reduce or enhance the thermoluminescent properties due to increasing or decreasing non-radiative decay processes, thereby providing a means to externally control the temperature sensitivity of the system. Through comparison with analogues with a higher degree of conformational freedom, the high thermosensitivity of CarROT over the physiological temperature range was determined to be due to conformational strain, which causes a high energy barrier to rotation over this range. Analogues with a higher degree of conformational freedom display lower sensitivities towards temperature over the same temperature range. This study provides an example of an information rich small molecule, in which programable rotational speed states can be observed with facile read-out.
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Affiliation(s)
- Stuart N Berry
- The University of Sydney, School of Chemistry, AUSTRALIA
| | - Meijun Zou
- The University of Sydney, School of Chemistry, AUSTRALIA
| | - Sarah L Nguyen
- The University of Sydney, School of Chemistry, AUSTRALIA
| | | | - Lei Qin
- The University of Sydney, School of Chemistry, AUSTRALIA
| | - William Lewis
- The University of Sydney, School of Chemistry, AUSTRALIA
| | - Katrina Jolliffe
- University of Sydney, Chemistry, School of Chemistry, The University of Sydney, 2006, Sydney, AUSTRALIA
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14
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Zeine GM, Omoto ÉM, Ramos FDSES, Briso ALF, Dos Santos PH, Fagundes TC. Fluorescence intensity of composite resin for direct veneer removal using a fluorescence-aided identification technique. J ESTHET RESTOR DENT 2024. [PMID: 38500312 DOI: 10.1111/jerd.13223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/20/2024]
Abstract
OBJECTIVES This laboratory study evaluated the influence of the fluorescence intensity of composite resins on additional tooth wear and the presence of restorative material in different dental thirds during the retreatment of direct veneers. MATERIALS AND METHODS The crown dimensions of 60 bovine incisors were reduced to 10 × 8 mm. The teeth were classified according to the fluorescence intensity of the composites: low (LOW) (TPH Spectra), medium (MED) (Opallis), and high (HIGH) (Essentia) groups. The teeth were divided according to the removal methods: conventional (CON) and fluorescence-aided identification technique (FIT). The specimens were scanned (T0), received veneer preparation, and scanned again (T1). After restorations, the composites were removed and the teeth were scanned (T2). Measurement assessments between T1 and T2 were performed to determine additional wear, presence of residual areas, and the average between additional wear and the presence of residual areas. Kruskal Wallis, Mann-Whitney, Friedman, 2-way ANOVA, and post-Tukey tests were performed (α < 0.05). RESULTS The comparison of composite resins indicated a smaller area of additional wear and greater residue presence in the HIGH group than the LOW group for both techniques in the cervical third. Regarding removal methods, the FIT produced greater additional wear than the CON method for the LOW and MED groups in the middle and cervical thirds. The incisal third exhibited greater additional wear than the other thirds. CONCLUSIONS Composite resins with high fluorescence intensity removed using FIT had less tooth wear. The incisal third was the most affected area for direct veneer removal procedures. CLINICAL SIGNIFICANCE A FIT has been proposed for composite resin removal; however, the different fluorescence intensities of composite resins can influence tooth wear caused during this procedure.
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Affiliation(s)
- Giovana Maria Zeine
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
| | - Érika Mayumi Omoto
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
| | - Fernanda de Souza E Silva Ramos
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
| | - Paulo Henrique Dos Santos
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
| | - Ticiane Cestari Fagundes
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Campus of Araçatuba, Araçatuba, SP, Brazil
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15
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Kocalar S, Miller BM, Huang A, Gleason E, Martin K, Foley K, Copeland DS, Jewett MC, Saavedra EA, Kraves S. Validation of Cell-Free Protein Synthesis Aboard the International Space Station. ACS Synth Biol 2024; 13:942-950. [PMID: 38442491 PMCID: PMC10949350 DOI: 10.1021/acssynbio.3c00733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 03/07/2024]
Abstract
Cell-free protein synthesis (CFPS) is a rapidly maturing in vitro gene expression platform that can be used to transcribe and translate nucleic acids at the point of need, enabling on-demand synthesis of peptide-based vaccines and biotherapeutics as well as the development of diagnostic tests for environmental contaminants and infectious agents. Unlike traditional cell-based systems, CFPS platforms do not require the maintenance of living cells and can be deployed with minimal equipment; therefore, they hold promise for applications in low-resource contexts, including spaceflight. Here, we evaluate the performance of the cell-free platform BioBits aboard the International Space Station by expressing RNA-based aptamers and fluorescent proteins that can serve as biological indicators. We validate two classes of biological sensors that detect either the small-molecule DFHBI or a specific RNA sequence. Upon detection of their respective analytes, both biological sensors produce fluorescent readouts that are visually confirmed using a hand-held fluorescence viewer and imaged for quantitative analysis. Our findings provide insights into the kinetics of cell-free transcription and translation in a microgravity environment and reveal that both biosensors perform robustly in space. Our findings lay the groundwork for portable, low-cost applications ranging from point-of-care health monitoring to on-demand detection of environmental hazards in low-resource communities both on Earth and beyond.
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Affiliation(s)
- Selin Kocalar
- Leigh
High School, 5210 Leigh
Ave, San Jose, California 95124, United States
- Massachusetts
Institute of Technology, 77 Massachusetts Ave, Cambridge, Massachusetts 02139, United States
| | - Bess M. Miller
- Division
of Genetics, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis St, Boston, Massachusetts 02115, United States
| | - Ally Huang
- miniPCR
bio, 1770 Massachusetts
Ave, Cambridge, Massachusetts 02140, United States
| | - Emily Gleason
- miniPCR
bio, 1770 Massachusetts
Ave, Cambridge, Massachusetts 02140, United States
| | - Kathryn Martin
- miniPCR
bio, 1770 Massachusetts
Ave, Cambridge, Massachusetts 02140, United States
| | - Kevin Foley
- Boeing
Defense, Space & Security, 6398 Upper Brandon Dr, Houston, Texas 77058, United States
| | - D. Scott Copeland
- Boeing
Defense, Space & Security, 6398 Upper Brandon Dr, Houston, Texas 77058, United States
| | - Michael C. Jewett
- Department
of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Rd, Evanston, Illinois 60208, United States
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
| | | | - Sebastian Kraves
- miniPCR
bio, 1770 Massachusetts
Ave, Cambridge, Massachusetts 02140, United States
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16
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Tatsi E, De Marzi M, Mauri L, Colombo A, Botta C, Turri S, Dragonetti C, Griffini G. Semi-Transparent Luminescent Solar Concentrators Based on Intramolecular Energy Transfer in Polyurethane Matrices. Macromol Rapid Commun 2024:e2300724. [PMID: 38485136 DOI: 10.1002/marc.202300724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 03/12/2024] [Indexed: 03/24/2024]
Abstract
Luminescent solar concentrators (LSCs) are spectral conversion devices offering interesting opportunities for the integration of photovoltaics into the built environment and portable systems. The Förster-resonance energy transfer (FRET) process can boost the optical response of LSCs by reducing energy losses typically associated to non-radiative processes occurring within the device under operation. In this work, a new class of FRET-based thin-film LSC devices is presented, in which the synthetic versatility of linear polyurethanes (PU) is exploited to control the photophysical properties and the device performance of the resulting LSCs. A series of luminescent linear PUs are synthesized in the presence of two novel bis-hydroxyl-functionalized luminophores of suitable optical properties, used as chain extenders during the step-growth polyaddition reaction for the formation of the linear macromolecular network. By synthetically tuning their composition, the obtained luminescent PUs can achieve a high energy transfer efficiency (≈90%) between the covalently linked luminophores. The corresponding LSC devices exhibit excellent photonic response, with external and internal photon efficiencies as high as ≈4% and ≈37%, respectively. Furthermore, their optimized power conversion efficiency combined with their enhanced average visible-light transmittance highlight their suitability for potential use as transparent solar energy devices.
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Affiliation(s)
- Elisavet Tatsi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, 20133, Italy
| | - Matteo De Marzi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, 20133, Italy
| | - Luca Mauri
- Department of Chemistry, Università degli Studi di Milano, Via Camillo Golgi 19, Milano, 20133, Italy
| | - Alessia Colombo
- Department of Chemistry, Università degli Studi di Milano, Via Camillo Golgi 19, Milano, 20133, Italy
| | - Chiara Botta
- Institute of Sciences and Chemical Technologies "Giulio Natta" (SCITEC) of CNR, via Corti 12, Milano, 20133, Italy
| | - Stefano Turri
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, 20133, Italy
| | - Claudia Dragonetti
- Department of Chemistry, Università degli Studi di Milano, Via Camillo Golgi 19, Milano, 20133, Italy
| | - Gianmarco Griffini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, 20133, Italy
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17
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Dou D, Shi Q, Li H, Zhang B, Yang D, Wang Y. Rational Combination of π-Conjugated and Non-π-Conjugated Groups Achieving Strong Nonlinear Optical Response, Large Optical Anisotropy, and UV Light-Switchable Fluorescence. Adv Sci (Weinh) 2024:e2401325. [PMID: 38477442 DOI: 10.1002/advs.202401325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 02/28/2024] [Indexed: 03/14/2024]
Abstract
Combining π-conjugated and non-π-conjugated groups is an important strategy for synthesizing new nonlinear optical (NLO) crystals. However, the second harmonic generation (SHG) response and optical anisotropy can be limited by improper spatial alignment of these functional groups in the crystal structure. In this work, it is revealed that non-π-conjugated [NH2 SO3 ] group acts as both hydrogen bond donor and acceptor, effectively regulating the 2D planar structure formed by π-conjugated [C4 N3 H6 ] groups. The resulting organic-inorganic hybrid crystal C4 N3 H6 SO3 NH2 exhibits a strong SHG response (2.5 × KDP), large optical anisotropy (0.233@546 nm), and blue-violet and green fluorescence near 360 and 520 nm, respectively. This work expands the methodology for creating new NLO crystals through organic-inorganic hybridization, while also showcasing the potential of C4 N3 H6 SO3 NH2 as a multifunctional optical material.
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Affiliation(s)
- Danyang Dou
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
| | - Qi Shi
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
| | - Huimin Li
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
| | - Bingbing Zhang
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
- Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Daqing Yang
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
| | - Ying Wang
- Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China
- Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
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18
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Cimmino L, Diaferia C, Rosa M, Morelli G, Rosa E, Accardo A. Hybrid peptide-PNA monomers as building blocks for the fabrication of supramolecular aggregates. J Pept Sci 2024:e3573. [PMID: 38471735 DOI: 10.1002/psc.3573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/06/2024] [Accepted: 02/06/2024] [Indexed: 03/14/2024]
Abstract
Advantages like biocompatibility, biodegradability and tunability allowed the exploitation of peptides and peptidomimetics as versatile therapeutic or diagnostic agents. Because of their selectivity towards transmembrane receptors or cell membranes, peptides have also been identified as suitable molecules able to deliver in vivo macromolecules, proteins or nucleic acids. However, after the identification of the homodimer diphenylalanine (FF) as an aggregative motif inside the Aβ1-42 polypeptide, short and ultrashort peptides have been studied as building blocks for the fabrication of supramolecular, ordered nanostructures for applications in biotechnological, biomedical and industrial fields. In this perspective, many hybrid molecules that combine FF with other chemical entities have been synthesized and characterized. Two novel hybrid derivatives (tFaF and cFgF), in which the FF homodimer is alternated with the peptide-nucleic acid (PNA) heterodimer "g-c" (guanine-cytosine) or "a-t" (adenine-thymine) and their dimeric forms (tFaF)2 and (cFgF)2 were synthesized. The structural characterization performed by circular dichroism (CD), Fourier transform infrared (FTIR) and fluorescence spectroscopies highlighted the capability of all the FF-PNA derivatives to self-assemble into β-sheet structures. As a consequence of this supramolecular organization, the resulting aggregates also exhibit optoelectronic properties already reported for other similar nanostructures. This photoemissive behavior is promising for their potential applications in bioimaging.
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Affiliation(s)
| | - Carlo Diaferia
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Naples, Italy
| | - Mariangela Rosa
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Naples, Italy
| | - Giancarlo Morelli
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Naples, Italy
| | - Elisabetta Rosa
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Naples, Italy
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19
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Lin C, Du H. Interactions between forsythoside E and two cholinesterases at the different conditions: fluorescence sections. Methods Appl Fluoresc 2024; 12:025003. [PMID: 38428023 DOI: 10.1088/2050-6120/ad2f3a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 03/01/2024] [Indexed: 03/03/2024]
Abstract
Forsythoside E is one secondary metabolite ofForsythia suspensa(Thunb.) Vahl. In the study, the interactions between forsythoside E and two types of cholinesterases, acetylcholinesterase and butyrylcholinesterase were investigated in the different conditions. Forsythoside E increased the fluorescence intensity of acetylcholinesterase but quenched the fluorescence of butyrylcholinesterase. Aβ25-35used in the study may not form complexes with cholinesterases, and did not affect the interaction between forsythoside E and cholinesterases. The charged quaternary group of AsCh interacted with the 'anionic' subsite in acetylcholinesterase, which did not affect the interaction between forsythoside E and acetylcholinesterase. The enhancement rate of forsythoside E to acetylcholinesterase fluorescence from high to low was acid solution (pH 6.4), neutral solution (pH 7.4) and alkaline solution (pH 8.0), while the reduction rate of forsythoside E to butyrylcholinesterase fluorescence was in reverse order. Metal ions may interact with cholinesterases, and increased the effects of forsythoside E to cholinesterases fluorescence, in order that Fe3+was the highest, followed by Cu2+, and Mg2+. A forsythoside E-butyrylcholinesterase complex at stoichiometric ratio of 1:1 was spontaneously formed, and the static quenching was the main quenching mode in the process of forsythoside E binding with butyrylcholinesterase. TheKvalues of two complexes were pretty much the same, suggesting that the interaction between cholinesterases and forsythoside E was almost unaffected by acid-base environment and metal ions. Thennumbers of two cholinesterases approximately equaled to one, indicating that there was only one site on each cholinesterase applicable for forsythoside E to bind to.
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Affiliation(s)
- Conghuan Lin
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, People's Republic of China
| | - Huizhi Du
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, People's Republic of China
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20
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Schniererová K, Janeková H, Joniak J, Putala M, Stacko P, Stankovičová H. pH-Responsive Aminobenzocoumarins as Fluorescent Probes for Biological Acidity. Chemistry 2024:e202400111. [PMID: 38470944 DOI: 10.1002/chem.202400111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 03/14/2024]
Abstract
Regulation of pH plays an essential role in orchestrating the delicate cellular machinery responsible for life as we know it. Its abnormal values are indicative of aberrant cellular behavior and associated with pathologies including cancer progression or solid tumors. Here, we report a series of bent and linear aminobenzocoumarins decorated with different substituents. We investigate their photophysical properties and demonstrate that the probes display strong pH-responsive fluorescence "turn on" behavior in highly acidic environments, with enhancement up to 300-fold. In combination with their low cytotoxicity, this behavior enabled their application in bioimaging of acidic lysosomes in live human cells. We believe that these molecules serve as attractive lead structures for future rational design of novel biocompatible fluorescent pH probes.
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Affiliation(s)
- Karin Schniererová
- Comenius University in Bratislava, Department of Organic Chemistry, SLOVAKIA
| | - Hana Janeková
- University of Zurich, Department of Chemistry, SWITZERLAND
| | - Jakub Joniak
- Comenius University in Bratislava, Department of Organic Chemistry, SLOVAKIA
| | - Martin Putala
- Comenius University in Bratislava, Department of Organic Chemistry, SLOVAKIA
| | - Peter Stacko
- University of Zurich: Universitat Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057, Zurich, SWITZERLAND
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21
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Rybalkin VP, Zmeeva SY, Popova LL, Dubonosova IV, Karlutova OY, Demidov OP, Dubonosov AD, Bren VA. Synthesis of photo- and ionochromic N-acylated 2-(aminomethylene)benzo[ b]thiophene-3(2 Н)-ones with a terminal phenanthroline group. Beilstein J Org Chem 2024; 20:552-560. [PMID: 38505235 PMCID: PMC10949002 DOI: 10.3762/bjoc.20.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/28/2024] [Indexed: 03/21/2024] Open
Abstract
A series of novel photo- and ionochromic N-acylated 2-(aminomethylene)benzo[b]thiophene-3(2Н)-ones with a terminal phenanthroline receptor substituent was synthesized. Upon irradiation in acetonitrile or DMSO with light of 436 nm, they underwent Z-E isomerization of the C=C bond, followed by very fast N→O migration of the acyl group and the formation of nonemissive O-acylated isomers. These isomers were isolated preparatively and fully characterized by IR, 1H, and 13C NMR spectroscopy as well as HRMS and XRD methods. The reverse thermal reaction was catalyzed by protonic acids. N-Acylated compounds exclusively with Fe2+ formed nonfluorescent complexes with a contrast naked-eye effect: a color change of the solutions from yellow to dark orange. Subsequent selective interaction with AcO- led to the restoration of the initial absorption and emission properties. Thus, the obtained compounds represent dual-mode "on-off-on" switches of optical and fluorescent properties under sequential exposure to light and H+ or sequential addition of Fe2+ and AcO- ions.
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Affiliation(s)
- Vladimir P Rybalkin
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of Sciences, Rostov-on-Don 344006, Russian Federation
| | - Sofiya Yu Zmeeva
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Lidiya L Popova
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Irina V Dubonosova
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Olga Yu Karlutova
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Oleg P Demidov
- North Caucasus Federal University, Stavropol 355009, Russian Federation
| | - Alexander D Dubonosov
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of Sciences, Rostov-on-Don 344006, Russian Federation
| | - Vladimir A Bren
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
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22
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Baleeva NS, Bogdanova YA, Goncharuk MV, Sokolov AI, Myasnyanko IN, Kublitski VS, Smirnov AY, Gilvanov AR, Goncharuk SA, Mineev KS, Baranov MS. A Combination of Library Screening and Rational Mutagenesis Expands the Available Color Palette of the Smallest Fluorogen-Activating Protein Tag nanoFAST. Int J Mol Sci 2024; 25:3054. [PMID: 38474299 DOI: 10.3390/ijms25053054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024] Open
Abstract
NanoFAST is the smallest fluorogen-activating protein, consisting of only 98 amino acids, used as a genetically encoded fluorescent tag. Previously, only a single fluorogen with an orange color was revealed for this protein. In the present paper, using rational mutagenesis and in vitro screening of fluorogens libraries, we expanded the color palette of this tag. We discovered that E46Q is one of the key substitutions enabling the range of possible fluorogens to be expanded. The introduction of this and several other substitutions has made it possible to use not only orange but also red and green fluorogens with the modified protein.
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Affiliation(s)
- Nadezhda S Baleeva
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Laboratory of Medicinal Substances Chemistry, Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997 Moscow, Russia
| | - Yulia A Bogdanova
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Marina V Goncharuk
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Anatolii I Sokolov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Laboratory of Medicinal Substances Chemistry, Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997 Moscow, Russia
| | - Ivan N Myasnyanko
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Laboratory of Medicinal Substances Chemistry, Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997 Moscow, Russia
| | - Vadim S Kublitski
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Alexander Yu Smirnov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Laboratory of Medicinal Substances Chemistry, Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997 Moscow, Russia
| | - Aidar R Gilvanov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Sergey A Goncharuk
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Konstantin S Mineev
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Mikhail S Baranov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Laboratory of Medicinal Substances Chemistry, Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997 Moscow, Russia
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23
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Stepanchuk AA, Stys PK. Spectral Fluorescence Pathology of Protein Misfolding Disorders. ACS Chem Neurosci 2024; 15:898-908. [PMID: 38407017 DOI: 10.1021/acschemneuro.3c00798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024] Open
Abstract
Protein misfolding has been extensively studied in the context of neurodegenerative disorders and systemic amyloidoses. Due to misfolding and aggregation of proteins being highly heterogeneous and generating a variety of structures, a growing body of evidence illustrates numerous ways how the aggregates contribute to progression of diseases such as Alzheimer's disease, Parkinson's disease, and prion disorders. Different misfolded species of the same protein, commonly referred to as strains, appear to play a significant role in shaping the disease clinical phenotype and clinical progression. The distinct toxicity profiles of various misfolded proteins underscore their importance. Current diagnostics struggle to differentiate among these strains early in the disease course. This review explores the potential of spectral fluorescence approaches to illuminate the complexities of protein misfolding pathology and discusses the applications of advanced spectral methods in the detection and characterization of protein misfolding disorders. By examining spectrally variable probes, current data analysis approaches, and important considerations for the use of these techniques, this review aims to provide an overview of the progress made in this field and highlights directions for future research.
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Affiliation(s)
- Anastasiia A Stepanchuk
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Peter K Stys
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
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24
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Schmeltzer AJ, Peterson EM, Harris JM, Lathrop DK, German SR, White HS. Simultaneous Multipass Resistive-Pulse Sensing and Fluorescence Imaging of Liposomes. ACS Nano 2024; 18:7241-7252. [PMID: 38377597 DOI: 10.1021/acsnano.3c12627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Simultaneous multipass resistive-pulse sensing and fluorescence imaging have been used to correlate the size and fluorescence intensity of individual E. coli lipid liposomes composed of E. coli polar lipid extracts labeled with membrane-bound 3,3-dioctadecyloxacarbocyanine (DiO) fluorescent molecules. Here, a nanopipet serves as a waveguide to direct excitation light to the resistive-pulse sensing zone at the end of the nanopipet tip. Individual DiO-labeled liposomes (>50 nm radius) were multipassed back and forth through the orifices of glass nanopipets' 110-150 nm radius via potential switching to obtain subnanometer sizing precision, while recording the fluorescence intensity of the membrane-bound DiO molecules. Fluorescence was measured as a function of liposome radius and found to be approximately proportional to the total membrane surface area. The observed relationship between liposome size and fluorescence intensity suggests that multivesicle liposomes emit greater fluorescence compared to unilamellar liposomes, consistent with all lipid membranes of the multivesicle liposomes containing DiO. Fluorescent and nonfluorescent liposomes are readily distinguished from each other in the same solution using simultaneous multipass resistive-pulse sensing and fluorescence imaging. A fluorescence "dead zone" of ∼1 μm thickness just outside of the nanopipet orifice was observed during resistive-pulse sensing, resulting in "on/off" fluorescent behavior during liposome multipassing.
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Affiliation(s)
| | - Eric M Peterson
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Joel M Harris
- Department of Chemistry, University of Utah; Salt Lake City, Utah 84112, United States
| | - Daniel K Lathrop
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Sean R German
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Henry S White
- Department of Chemistry, University of Utah; Salt Lake City, Utah 84112, United States
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25
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Jiang Z, Wu J, Qiu Y, Shen G. Perfusion Analysis Using High-Definition Indocyanine Green Angiography in Burn Comb Model. J Burn Care Res 2024; 45:373-383. [PMID: 37830308 DOI: 10.1093/jbcr/irad156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Indexed: 10/14/2023]
Abstract
Indocyanine green angiography (ICGA) has been widely employed for quantitative evaluation of the rat comb burn model, but the imaging equipment, imaging protocol, and fluorescence data interpretation of ICGA remain unsatisfactory. This study aims to provide better solutions for the application of ICGA in perfusion analysis. The rat comb burn model was established under a series of different comb contact durations, including 10, 20, 25, 30, 35, and 40 s. Indocyanine green angiography was used to analyze wound perfusion. In total, 16 rats were divided into ibuprofen and control groups for the burn model, and their perfusion was compared. A total of 16 identical models were divided into standard- and high-dose indocyanine green (ICG) groups, and ICGA was conducted to investigate the dynamic change in wound fluorescence. Escharectomy was performed under real-time fluorescence mapping and navigation. The results showed that a comb contact duration of 30 s was optimum for the burn model. Indocyanine green angiography could accurately evaluate the histologically determined depth of thermal injury and wound perfusion in the rat comb model. Digital subtraction of residual fluorescence was necessary for multiple comparisons of perfusion. Dynamic changes in fluorescence and necrotic tissues were observed more clearly by high-dose (0.5 mg/kg) ICG in angiography. In conclusion, perfusion analysis by ICGA can be used to assess the histologically determined depth of thermal injury and the impact of a specific treatment on wound perfusion. Indocyanine green angiography can help to identify necrotic tissue. The above findings and related imaging protocols lay the foundation for future research.
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Affiliation(s)
- Zhaolong Jiang
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of Burn and Plastic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Junqiang Wu
- Department of Breast Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Yunjie Qiu
- Department of Medical Statistics, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Guoliang Shen
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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26
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Maļeckis A, Cvetinska M, Kirjušina M, Mežaraupe L, Kecko S, Gavarāne I, Kiyan V, Lider L, Pavlova V, Savicka M, Belyakov S, Kirilova E. A Comparative Study of New Fluorescent Anthraquinone and Benzanthrone α-Aminophosphonates: Synthesis, Spectroscopy, Toxicology, X-ray Crystallography, and Microscopy of Opisthorchis felineus. Molecules 2024; 29:1143. [PMID: 38474655 DOI: 10.3390/molecules29051143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 02/28/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
In this research, we explore the synthesis of and characterize α-aminophosphonates derived from anthraquinone and benzanthrone, focusing on their fluorescence properties and potential applications in confocal laser scanning microscopy (CLSM). The synthesized compounds exhibit notable solvatochromic behavior, emitting fluorescence from green to red across various solvents. Spectroscopic analysis, including 1H-, 13C-, and 31P-NMR, FTIR, and mass spectrometry, confirms the chemical structures. The compounds' toxicity is evaluated using etiolated wheat sprouts, revealing varying degrees of impact on growth and oxidative damage. Furthermore, the study introduces these α-aminophosphonates for CLSM imaging of the parasitic flatworm Opisthorchis felineus, demonstrating their potential in visualizing biological specimens. Additionally, an X-ray crystallographic study of an anthraquinone α-aminophosphonate provides valuable structural insights.
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Affiliation(s)
- Armands Maļeckis
- Institute of Chemistry and Chemical Technology, Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, LV-1048 Riga, Latvia
| | - Marija Cvetinska
- Institute of Chemistry and Chemical Technology, Faculty of Natural Sciences and Technology, Riga Technical University, P. Valdena Str. 3, LV-1048 Riga, Latvia
| | - Muza Kirjušina
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Ligita Mežaraupe
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Sanita Kecko
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Inese Gavarāne
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Vladimir Kiyan
- Laboratory of Biodiversity and Genetic Resources, National Center for Biotechnology, 13/5 Kurgalzhynskoye Road, Astana 010000, Kazakhstan
| | - Lyudmila Lider
- Faculty of Veterinary Medicine and Animal Husbandry Technology, S. Seifullin Kazakh Agro Technical Research University, 62 Zhenis Avenue, Astana 010011, Kazakhstan
| | - Veronika Pavlova
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Marina Savicka
- Department of Ecology, Institute of Life Sciences and Technology, Daugavpils University, LV-5401 Daugavpils, Latvia
| | - Sergey Belyakov
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, LV-1006 Riga, Latvia
| | - Elena Kirilova
- Department of Environment and Technologies, Faculty of Natural Sciences and Healthcare, Daugavpils University, LV-5401 Daugavpils, Latvia
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27
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Hasan J, Bok S. Plasmonic Fluorescence Sensors in Diagnosis of Infectious Diseases. Biosensors (Basel) 2024; 14:130. [PMID: 38534237 DOI: 10.3390/bios14030130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/25/2024] [Accepted: 02/26/2024] [Indexed: 03/28/2024]
Abstract
The increasing demand for rapid, cost-effective, and reliable diagnostic tools in personalized and point-of-care medicine is driving scientists to enhance existing technology platforms and develop new methods for detecting and measuring clinically significant biomarkers. Humanity is confronted with growing risks from emerging and recurring infectious diseases, including the influenza virus, dengue virus (DENV), human immunodeficiency virus (HIV), Ebola virus, tuberculosis, cholera, and, most notably, SARS coronavirus-2 (SARS-CoV-2; COVID-19), among others. Timely diagnosis of infections and effective disease control have always been of paramount importance. Plasmonic-based biosensing holds the potential to address the threat posed by infectious diseases by enabling prompt disease monitoring. In recent years, numerous plasmonic platforms have risen to the challenge of offering on-site strategies to complement traditional diagnostic methods like polymerase chain reaction (PCR) and enzyme-linked immunosorbent assays (ELISA). Disease detection can be accomplished through the utilization of diverse plasmonic phenomena, such as propagating surface plasmon resonance (SPR), localized SPR (LSPR), surface-enhanced Raman scattering (SERS), surface-enhanced fluorescence (SEF), surface-enhanced infrared absorption spectroscopy, and plasmonic fluorescence sensors. This review focuses on diagnostic methods employing plasmonic fluorescence sensors, highlighting their pivotal role in swift disease detection with remarkable sensitivity. It underscores the necessity for continued research to expand the scope and capabilities of plasmonic fluorescence sensors in the field of diagnostics.
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Affiliation(s)
- Juiena Hasan
- Department of Electrical and Computer Engineering, Ritchie School of Engineering and Computer Science, University of Denver, Denver, CO 80208, USA
| | - Sangho Bok
- Department of Electrical and Computer Engineering, Ritchie School of Engineering and Computer Science, University of Denver, Denver, CO 80208, USA
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28
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Hameed YAS, Alamrani NA, Sallam S, Ibarhiam SF, Almahri A, Alorabi AQ, El-Metwaly NM. Development of photoluminescent viscose fibers integrated with polymer containing lanthanide-doped phosphor. Microsc Res Tech 2024; 87:591-601. [PMID: 38009361 DOI: 10.1002/jemt.24441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/20/2023] [Accepted: 10/08/2023] [Indexed: 11/28/2023]
Abstract
Smart clothing refers to textiles that can sense an external stimulus by changing their physical properties such as colorimetric and fluorescent fabrics. The pad-dry-curing coloration approach was used to apply a luminous and hydrophobic composite coating onto cellulose-based materials. This novel method includes incorporating phosphor nanoparticles made from lanthanide-doped strontium aluminum oxide (LSAO) into room temperature vulcanizing silicone rubber (RTV). The LSAO nano-sized particles (3-8 nm) must be mixed evenly throughout RTV without aggregation to allow for the formation of a colorless layer onto viscose surface. Pad-dry-curing the film onto viscose cloth worked well at room temperature. The contact angles of the luminous fibers enhanced from 138.6° to 158.2° as the LSAO ratio increased. The antimicrobial and ultraviolet (UV) protection of the LSAO-finished viscose were investigated. The transparent fluorescent film on viscose surface was excited at 367 nm to display an emission peak at 518 nm. According to CIE Lab coordinates and luminescence analyses, the fluorescent viscose fibers showed various colors, including white under visible light, intense green beneath UV device, and greenish-yellow under darkness. The comfort properties of the LSAO-finished viscose were assessed by measuring their bend length and permeability to air. Transmission electron microscopic analysis of LSAO nanoparticles was explored. Energy dispersive x-ray, x-ray fluorescence, and scanning electron microscopy were utilized to describe the spectroscopic outcomes of the treated textiles. The colorfastness of the LSAO-finished viscose fabrics was examined. The coated fabrics exhibited a non-fatigable reversible luminous photochromism in response to UV illumination. RESEARCH HIGHLIGHTS: Multifunctional LSAO@RTV nanocomposite was pad-dry-cured onto viscose textile. Photochromism to green under UV light and greenish-yellow in the dark was detected. Efficient antimicrobial, UV protective, and superhydrophobic activity were observed. The antimicrobial properties were maintained for 24 washing cycles. Pad-dry-cured viscose showed good comfortability and photostability.
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Affiliation(s)
- Yasmeen A S Hameed
- Department of Chemistry, Faculty of Science, Northern Border University, Arar, Saudi Arabia
| | - Nasser A Alamrani
- Department of Chemistry, College of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Sahar Sallam
- Department of Chemistry, Faculty of Science, Jazan University, Jazan, Saudi Arabia
| | - Saham F Ibarhiam
- Department of Chemistry, College of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Albandary Almahri
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Ali Q Alorabi
- Department of Chemistry, Faculty of Sciences, Al-Baha University, Al-Baha, Saudi Arabia
| | - Nashwa M El-Metwaly
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
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29
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Crocombe RA, Kammrath BW, Leary PE, Tague TJ, Costa WDP. LEGO Blocks as "Standard" Samples for Evaluation of Fluorescence Avoidance and Mitigation in Raman Spectroscopy. Appl Spectrosc 2024; 78:340-348. [PMID: 38374334 DOI: 10.1177/00037028231221585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Fluorescence interference in Raman spectroscopy is a well-known problem and is especially significant in portable instruments where the availability of a variety of exciting wavelengths is unlikely. Several fluorescence avoidance and mitigation schemes are described in the literature, and implemented by Raman spectrometer manufacturers, but there is no standard method for evaluating the accuracy and repeatability of these schemes. Some test samples shown in instrument descriptions, such as "dark rum" and "sesame seed oil" are not reproducible. Therefore, we propose a set of colored LEGO blocks as "standard" samples for this purpose; they have the attractive properties of being very low cost, rugged, non-toxic, easy to transport and store, and appear to be manufactured using a standard process. This paper shows the Raman spectra of a set of these blocks at different excitation wavelengths, acquired on laboratory instruments, along with their visible-near-infrared spectra. The goal is to qualitatively understand the origins of the observed fluorescence and lay the groundwork for exploring the effectiveness of methods currently implemented on handheld Raman instruments.
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Affiliation(s)
| | - Brooke W Kammrath
- Henry C. Lee College of Criminal Justice and Forensic Sciences, University of New Haven, West Haven, Connecticut, USA
- Henry C. Lee Institute of Forensic Science, West Haven, Connecticut, USA
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30
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Gest AM, Grenier V, Miller EW. Optical Estimation of Membrane Potential Values Using Fluorescence Lifetime Imaging Microscopy and Hybrid Chemical-Genetic Voltage Indicators. Bioelectricity 2024; 6:34-41. [PMID: 38516638 PMCID: PMC10951690 DOI: 10.1089/bioe.2023.0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024] Open
Abstract
Introduction Membrane potential (Vm), the voltage across a cell membrane, is an important biophysical phenomenon, central to the physiology of cells, tissues, and organisms. Voltage-sensitive fluorescent indicators are a powerful method for interrogating membrane potential in living systems, but most indicators are best suited for detecting changes in membrane potential rather than measuring values of the membrane potential. One promising approach is to use fluorescence lifetime imaging microscopy (FLIM) in combination of chemically synthesized dyes to estimate a value of membrane potential. However, a drawback is that chemically synthesized dyes show poor specificity of staining. Objectives To address this problem, we applied a chemical-genetic voltage imaging approach to FLIM to enable optical estimation of membrane potential values from genetically defined cells. Results In this report, we detail the characterization and evaluation of two of these systems in mammalian cells. We further validate the use of a FLIM-based chemical genetic voltage indicator in mammalian neurons. Conclusions Finally, we discuss opportunities for future improvements to chemical-genetic FLIM-based voltage indicators.
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Affiliation(s)
- Anneliese M.M. Gest
- Department of Chemistry, University of California, Berkeley, California, USA
| | - Vincent Grenier
- Department of Chemistry, University of California, Berkeley, California, USA
| | - Evan W. Miller
- Department of Chemistry, University of California, Berkeley, California, USA
- Department of Molecular & Cell Biology, University of California, Berkeley, California, USA
- Helen Wills Neuroscience Institute, University of California, Berkeley, California, USA
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31
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Hachisuka D, Nakano S, Takase H, Sugiyama M, Sugiura M, Fujii K, Masaki A, Murase T, Inagaki H. Fluorescent periodic acid Schiff-like staining combined with standard cytologic staining of the same cytologic specimen may facilitate cytopathologic diagnosis. Diagn Cytopathol 2024; 52:139-144. [PMID: 37997615 DOI: 10.1002/dc.25256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/09/2023] [Accepted: 11/10/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND Periodic acid Schiff (PAS) staining which detects glycogen and mucosubstances is frequently used as an ancillary method for an accurate cytopathologic diagnosis. Unfortunately, cytologic slides for PAS stain are not routinely prepared. Aqueous 7-amino-4-methylcoumarin (AMC) is colorless and transparent under bright field illumination but exhibits strong fluorescence under ultraviolet (UV) light and can be used as a Schiff reagent. We recently reported that combining [author: Please define (H&E) in the first occurrence if necessary.]H&E and AMC is useful for histopathologic diagnosis of various disease conditions. In this study, we investigated whether standard cytologic staining (Papanicolaou [Pap] and Giemsa) combined with AMC was useful for cytopathologic analysis. METHODS Specimens of non-neoplastic human tissues and archived cytologic specimens of various disease conditions were stained with a combination of Pap and AMC (Pap/AMC) or Giemsa and AMC (Giemsa/AMC). RESULTS The addition of AMC had no significant effect on Pap or Giemsa staining, and the cytomorphology under bright field microscopy was perfectly preserved. The AMC fluorescent signals observed under UV light were intense and the staining pattern was identical to that obtained by PAS staining. Diastase digestion differentiated glycogen from other AMC-positive elements. The efficacy of using Pap/AMC and Giemsa/AMC for archived cytologic specimens was demonstrated in several diseases including cases of endometrial carcinoma, adenoid cystic carcinoma, metastatic signet-ring cell carcinoma, candidiasis, and trichomoniasis. CONCLUSION Pap/AMC and Giemsa/AMC are useful in aiding cytopathologic diagnosis especially when the information gained from PAS staining is critical and cytologic specimens for PAS are not available.
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Affiliation(s)
- Daisuke Hachisuka
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Satsuki Nakano
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Hiroshi Takase
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Mio Sugiyama
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Mariko Sugiura
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Keiichiro Fujii
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Ayako Masaki
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Takayuki Murase
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Hiroshi Inagaki
- Department of Pathology and Molecular Diagnostics, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
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32
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Chavan A, Heisler J, Chang YG, Golden SS, Partch CL, LiWang A. Protocols for in vitro reconstitution of the cyanobacterial circadian clock. Biopolymers 2024; 115:e23559. [PMID: 37421636 PMCID: PMC10772220 DOI: 10.1002/bip.23559] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/26/2023] [Accepted: 06/16/2023] [Indexed: 07/10/2023]
Abstract
Circadian clocks are intracellular systems that orchestrate metabolic processes in anticipation of sunrise and sunset by providing an internal representation of local time. Because the ~24-h metabolic rhythms they produce are important to health across diverse life forms there is growing interest in their mechanisms. However, mechanistic studies are challenging in vivo due to the complex, that is, poorly defined, milieu of live cells. Recently, we reconstituted the intact circadian clock of cyanobacteria in vitro. It oscillates autonomously and remains phase coherent for many days with a fluorescence-based readout that enables real-time observation of individual clock proteins and promoter DNA simultaneously under defined conditions without user intervention. We found that reproducibility of the reactions required strict adherence to the quality of each recombinant clock protein purified from Escherichia coli. Here, we provide protocols for preparing in vitro clock samples so that other labs can ask questions about how changing environments, like temperature, metabolites, and protein levels are reflected in the core oscillator and propagated to regulation of transcription, providing deeper mechanistic insights into clock biology.
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Affiliation(s)
- Archana Chavan
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- School of Natural Sciences, University of California – Merced, Merced, CA 95343
| | - Joel Heisler
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- School of Natural Sciences, University of California – Merced, Merced, CA 95343
| | - Yong-Gang Chang
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- School of Natural Sciences, University of California – Merced, Merced, CA 95343
| | - Susan S. Golden
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- Department of Molecular Biology, University of California – San Diego, La Jolla, CA 92093
| | - Carrie L. Partch
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- Department of Chemistry & Biochemistry, University of California – Santa Cruz, Santa Cruz, CA 95064
| | - Andy LiWang
- Center for Circadian Biology, University of California – San Diego, La Jolla, CA 92093
- School of Natural Sciences, University of California – Merced, Merced, CA 95343
- Department of Chemistry & Biochemistry, University of California – Merced, Merced, CA 95343
- Center for Cellular and Biomolecular Machines, University of California – Merced, Merced, CA 95343
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Chen H, Nizard P, Decorse P, Nowak S, Ammar-Merah S, Pinson J, Gazeau F, Mangeney C, Luo Y. Dual-Mode Nanoprobes Based on Lanthanide Doped Fluoride Nanoparticles Functionalized by Aryl Diazonium Salts for Fluorescence and SERS Bioimaging. Small 2024; 20:e2305346. [PMID: 37875723 DOI: 10.1002/smll.202305346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/01/2023] [Indexed: 10/26/2023]
Abstract
The design of dual-mode fluorescence and Raman tags stimulates a growing interest in biomedical imaging and sensing applications as they offer the possibility to synergistically combine the versatility and velocity of fluorescence imaging with the specificity of Raman spectroscopy. Although lanthanide-doped fluoride nanoparticles (NPs) are among the most studied fluorescent nanoprobes, their use for the development of bimodal fluorescent-Raman probes has never been reported yet, to the best of the authors knowledge, probably due to the difficulty to functionalize them with Raman reporter groups. This gap is filled herein by proposing a fast and straightforward approach based on aryl diazonium salt chemistry to functionalize Eu3+ or Tb3+ doped CaF2 and LaF3 NPs by Raman scatters. The resulting surface-enhanced Raman spectroscopy (SERS)-encoded lanthanide-doped fluoride NPs retain their fluorescence labeling capacity and display efficient SERS activity for cell bioimaging. The potential of this new generation of bimodal nanoprobes is assessed through cell viability assays and intracellular fluorescence and Raman imaging, opening up unprecedented opportunities for biomedical applications.
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Affiliation(s)
- Huan Chen
- Université Paris Cité, CNRS, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Paris, F-75006, France
- Université Paris Cité, CNRS, Laboratoire Matière et Systèmes Complexes MSC, Paris, F-75006, France
| | - Philippe Nizard
- Université Paris Cité, CNRS, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Paris, F-75006, France
- Structural and Molecular Analysis platform core facility of BioMedTech Facilities INSERM US36, CNRS UAR2009, Université Paris Cité, Paris, F-75006, France
| | | | - Sophie Nowak
- Université Paris Cité, CNRS, ITODYS, Paris, F-75013, France
| | | | - Jean Pinson
- Université Paris Cité, CNRS, ITODYS, Paris, F-75013, France
| | - Florence Gazeau
- Université Paris Cité, CNRS, Laboratoire Matière et Systèmes Complexes MSC, Paris, F-75006, France
| | - Claire Mangeney
- Université Paris Cité, CNRS, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Paris, F-75006, France
| | - Yun Luo
- Université Paris Cité, CNRS, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Paris, F-75006, France
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Maity A, Wulffelé J, Ayala I, Favier A, Adam V, Bourgeois D, Brutscher B. Structural Heterogeneity in a Phototransformable Fluorescent Protein Impacts its Photochemical Properties. Adv Sci (Weinh) 2024; 11:e2306272. [PMID: 38146132 PMCID: PMC10933604 DOI: 10.1002/advs.202306272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/29/2023] [Indexed: 12/27/2023]
Abstract
Photoconvertible fluorescent proteins (PCFP) are important cellular markers in advanced imaging modalities such as photoactivatable localization microscopy (PALM). However, their complex photophysical and photochemical behavior hampers applications such as quantitative and single-particle-tracking PALM. This work employs multidimensional NMR combined with ensemble fluorescence measurements to show that the popular mEos4b in its Green state populates two conformations (A and B), differing in side-chain protonation of the conserved residues E212 and H62, altering the hydrogen-bond network in the chromophore pocket. The interconversion (protonation/deprotonation) between these two states, which occurs on the minutes time scale in the dark, becomes strongly accelerated in the presence of UV light, leading to a population shift. This work shows that the reversible photoswitching and Green-to-Red photoconversion properties differ between the A and B states. The chromophore in the A-state photoswitches more efficiently and is proposed to be more prone to photoconversion, while the B-state shows a higher level of photobleaching. Altogether, this data highlights the central role of conformational heterogeneity in fluorescent protein photochemistry.
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Affiliation(s)
- Arijit Maity
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Jip Wulffelé
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Isabel Ayala
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Adrien Favier
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Virgile Adam
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Dominique Bourgeois
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
| | - Bernhard Brutscher
- CEACNRSInstitut de Biologie Structurale (IBS)Université Grenoble Alpes71 avenue des Martyrs, Cedex 9Grenoble38044France
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35
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Pozzi P, Balan V, Candeo A, Brix A, Pistocchi AS, D’Andrea C, Valentini G, Bassi A. Full-aperture extended-depth oblique plane microscopy through dynamic remote focusing. J Biomed Opt 2024; 29:036502. [PMID: 38515831 PMCID: PMC10956707 DOI: 10.1117/1.jbo.29.3.036502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/02/2024] [Accepted: 03/06/2024] [Indexed: 03/23/2024]
Abstract
Significance The reprojection setup typical of oblique plane microscopy (OPM) limits the effective aperture of the imaging system, and therefore its efficiency and resolution. Large aperture system is only possible through the use of custom specialized optics. A full-aperture OPM made with off the shelf components would both improve the performance of the method and encourage its widespread adoption. Aim To prove the feasibility of an OPM without a conventional reprojection setup, retaining the full aperture of the primary objective employed. Approach A deformable lens based remote focusing setup synchronized with the rolling shutter of a complementary metal-oxide semiconductor detector is used instead of a traditional reprojection system. Results The system was tested on microbeads, prepared slides, and zebrafish embryos. Resolution and pixel throughput were superior to conventional OPM with cropped apertures, and comparable with OPM implementations with custom made optical components. Conclusions An easily reproducible approach to OPM imaging is presented, eliminating the conventional reprojection setup and exploiting the full aperture of the employed objective.
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Affiliation(s)
- Paolo Pozzi
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Vipin Balan
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Alessia Candeo
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Alessia Brix
- Università degli Studi di Milano, Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Milano, Italy
| | - Anna Silvia Pistocchi
- Università degli Studi di Milano, Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Milano, Italy
| | - Cosimo D’Andrea
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | | | - Andrea Bassi
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
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36
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Lv X, Li W, Zhang M, Wang R, Chang J. Investigation of steric hindrance effect on the interactions between four alkaloids and HSA by isothermal titration calorimetry and molecular docking. J Mol Recognit 2024; 37:e3075. [PMID: 38191989 DOI: 10.1002/jmr.3075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/24/2023] [Accepted: 12/24/2023] [Indexed: 01/10/2024]
Abstract
The binding of four alkaloids with human serum albumin (HSA) was investigated by isothermal titration calorimetry (ITC), spectroscopy and molecular docking techniques. The findings demonstrated that theophylline or caffeine can bind to HAS, respectively. The number of binding sites and binding constants are obtained. The binding mode is a static quenching process. The effects of steric hindrance, temperature, salt concentration and buffer solution on the binding indicated that theophylline and HSA have higher binding affinity than caffeine. The fluorescence and ITC results showed that the interaction between HSA and theophylline or caffeine is an entropy-driven spontaneous exothermic process. The hydrophobic force was the primary driving factor. The experimental results were consistent with the molecular docking data. Based on the molecular structures of the four alkaloids, steric hindrance might be a major factor in the binding between HSA and these four alkaloids. This study elucidates the mechanism of interactions between four alkaloids and HSA.
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Affiliation(s)
- Xinluan Lv
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, China
- Pingyuan Laboratory (Zhengzhou University), Zhengzho, China
| | - Wenjin Li
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, China
- Pingyuan Laboratory (Zhengzhou University), Zhengzho, China
| | - Miao Zhang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, China
- Pingyuan Laboratory (Zhengzhou University), Zhengzho, China
| | - Ruiyong Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, China
- Pingyuan Laboratory (Zhengzhou University), Zhengzho, China
| | - Junbiao Chang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, China
- Pingyuan Laboratory (Zhengzhou University), Zhengzho, China
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37
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Hoeher JE, Sande NE, Widom JR. Probing and perturbing riboswitch folding using a fluorescent base analogue. Photochem Photobiol 2024; 100:419-433. [PMID: 38098287 PMCID: PMC10950518 DOI: 10.1111/php.13896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 03/20/2024]
Abstract
Riboswitches are mRNA segments that regulate gene expression in response to ligand binding. The Class I preQ1 riboswitch consists of a stem-loop and an adenine-rich single-stranded tail ("L3"), which adopt a pseudoknot structure upon binding of the ligand preQ1 . We inserted 2-aminopurine (2-AP), a fluorescent analogue of adenine (A), into the riboswitch at six different positions within L3. Here, 2-AP functions both as a spectroscopic probe and as a "mutation" that reveals how alteration of specific A residues impacts the riboswitch. Using fluorescence and circular dichroism spectroscopy, we found that 2-AP decreases the affinity of the riboswitch for preQ1 at all labeling positions tested, although modified and unmodified variants undergo the same global conformational changes at sufficiently high preQ1 concentration. 2-AP substitution is most detrimental to ligand binding at sites proximal to the ligand-binding pocket, while distal labeling sites exhibit the largest impacts on the stability of the L3 domain in the absence of ligand. Insertion of multiple 2-AP residues does not induce significant additional disruptions. Our results show that interactions involving the A residues in L3 play a critical role in ligand recognition by the preQ1 riboswitch and that 2-AP substitution exerts complex and varied impacts on this riboswitch.
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Affiliation(s)
- Janson E. Hoeher
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR
| | - Natalie E. Sande
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR
| | - Julia R. Widom
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR
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38
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Gil HM, Booth Z, Price TW, Lee J, Naylor-Adamson L, Avery M, Muravitskaya A, Hondow N, Allsup D, Schneider JE, Naseem K, Adawi AM, Bouillard JSG, Chamberlain TW, Calaminus SDJ, Stasiuk GJ. Impact of Surface Ligand on the Biocompatibility of InP/ZnS Quantum Dots with Platelets. Small 2024; 20:e2304881. [PMID: 37946631 DOI: 10.1002/smll.202304881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 10/24/2023] [Indexed: 11/12/2023]
Abstract
InP/ZnS quantum dots (QDs) have received a large focus in recent years as a safer alternative to heavy metal-based QDs. Given their intrinsic fluorescent imaging capabilities, these QDs can be potentially relevant for in vivo platelet imaging. The InP/ZnS QDs are synthesized and their biocompatibility investigated through the use of different phase transfer agents. Analysis of platelet function indicates that platelet-QD interaction can occur at all concentrations and for all QD permutations tested. However, as the QD concentration increases, platelet aggregation is induced by QDs alone independent of natural platelet agonists. This study helps to define a range of concentrations and coatings (thioglycolic acid and penicillamine) that are biocompatible with platelet function. With this information, the platelet-QD interaction can be identified using multiple methods. Fluorescent lifetime imaging microscopy (FLIM) and confocal studies have shown QDs localize on the surface of the platelet toward the center while showing evidence of energy transfer within the QD population. It is believed that these findings are an important stepping point for the development of fluorescent probes for platelet imaging.
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Affiliation(s)
- Hélio M Gil
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, London, SE1 7EH, UK
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
| | - Zoe Booth
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
| | - Thomas W Price
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, London, SE1 7EH, UK
| | - Jessica Lee
- Centre for Biomedicine, University of Hull, Hull , HU6 7RX, UK
| | - Leigh Naylor-Adamson
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
| | - Michelle Avery
- Centre for Biomedicine, University of Hull, Hull , HU6 7RX, UK
| | - Alina Muravitskaya
- Department of Physics and Mathematics, University of Hull, Hull , HU6 7RX, UK
| | - Nicole Hondow
- School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - David Allsup
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
| | | | - Khalid Naseem
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Ali M Adawi
- Department of Physics and Mathematics, University of Hull, Hull , HU6 7RX, UK
| | | | - Thomas W Chamberlain
- Institute of Process Research and Development School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Simon D J Calaminus
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
| | - Graeme J Stasiuk
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, London, SE1 7EH, UK
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Wang S, Chen X, Yu S, Liu Z, Fu J, Zeng X. Naphthalimide-based fluorescent probe for Hg 2+ detection and imaging in living cells and zebrafish. LUMINESCENCE 2024; 39:e4699. [PMID: 38494638 DOI: 10.1002/bio.4699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/23/2024] [Accepted: 02/03/2024] [Indexed: 03/19/2024]
Abstract
A simple naphthalimide-based fluorescent probe was designed and synthesized for the determination of mercury ion (Hg2+ ). The probe showed a noticeable fluorescence quenching response for Hg2+ . When added with Hg2+ , the fluorescence intensity of the probe at 560 nm was remarkably decreased with the color changed from yellow to colorless under ultraviolet (UV) light. The probe had a notable selectivity and sensitivity for Hg2+ and displayed an excellent sensing performance when detecting Hg2+ at low concentration (19.5 nM). The binding phenomenon between the probe and Hg2+ was identified by Job's method and high-resolution mass spectrometry (HRMS). Moreover, the probe was not only utilized to identify Hg2+ in real samples with satisfactory results (92.00%-110.00%) but also was successfully used for bioimaging in cells and zebrafish. The recognition mechanism has been verified by transmission electron microscopy (TEM) for the first time. All the results showed that the probe could be used as a potent useful tool for detection of Hg2+ .
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Affiliation(s)
- Shanshan Wang
- Center of Characterization and Analysis, Jilin Institute of Chemical Technology, Jilin, P. R. China
| | - Xin Chen
- Center of Characterization and Analysis, Jilin Institute of Chemical Technology, Jilin, P. R. China
| | - Shihua Yu
- School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, P. R. China
| | - Zhigang Liu
- Center of Characterization and Analysis, Jilin Institute of Chemical Technology, Jilin, P. R. China
| | - Jing Fu
- Stomatological Hospital, Periodontics and Oral Medicine Department, Jinan, Shandong, P. R. China
| | - Xiaodan Zeng
- Center of Characterization and Analysis, Jilin Institute of Chemical Technology, Jilin, P. R. China
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40
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Matsuo Y, Gon M, Tanaka K, Seki S, Tanaka T. Benzannulated Double Aza[9]helicenes: Synthesis, Structures, and (Chir)optical Properties. Chem Asian J 2024:e202400134. [PMID: 38421377 DOI: 10.1002/asia.202400134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
A benzannulated double aza[9]helicene 1 was successfully synthesized via a one-pot oxidative fusion reaction. 1 was derivatized to N-alkylated double aza[9]helicene 1-Et and 1-Bu, whose structures were determined by X-ray diffraction analysis. 1-Et and 1-Bu exhibited red-shifted absorption and fluorescence spectra compared to single aza[9]helicene. The double aza[9]helicenes were expected to have two different conformers. Consistent with solid-state structure, the chiral-isomer was estimated to be more stable by 16 kcal/mol relative to meso-isomer. Indeed, enantiomers of 1-Et and 1-Bu were optically resolved by HPLC and showed mirror-imaged CD and CPL spectra with the CPL brightness up to 19.2 M-1 cm-1 for 1-Bu.
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Affiliation(s)
- Yusuke Matsuo
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigakukatsura Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigakukatsura Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigakukatsura Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Shu Seki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigakukatsura Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Takayuki Tanaka
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigakukatsura Nishikyo-ku, Kyoto, 615-8510, Japan
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41
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Gombár G, Ungor D, Szatmári I, Juhász Á, Csapó E. Tryptophanhydroxamic Acid-Stabilized Ultrasmall Gold Nanoclusters: Tuning the Selectivity for Metal Ion Sensing. Nanomaterials (Basel) 2024; 14:434. [PMID: 38470764 DOI: 10.3390/nano14050434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024]
Abstract
Sub-nanometer-sized gold nanoclusters (Au NCs) were prepared via the spontaneous reduction of [AuCl4]-- ions with a hydroxamate derivative of L-tryptophan (Trp) natural amino acid (TrpHA). The prepared TrpHA-Au NCs possess intense blue emission (λem = 470 nm; λex = 380 nm) with a 2.13% absolute quantum yield and 1.47 ns average lifetime. The Trp-stabilized noble metal NCs are excellent metal ion sensors for Fe3+, but in this work, we highlighted that the incorporation of the hydroxamate functional group with an excellent metal ion binding capability can tune the selectivity and sensitivity of these NCs, which is a promising way to design novel strategies for the detection of other metal ions as well. Moreover, their simultaneous identification can also be realized. By decreasing the sensitivity of our nano-sensor for Fe3+ (limit of detection (LOD) ~11 µM), it was clearly demonstrated that the selectivity for Cu2+-ions can be significantly increased (LOD = 3.16 µM) in an acidic (pH = 3-4) condition. The surface-bounded TrpHA molecules can coordinate the Cu2+ confirmed by thermodynamic data, which strongly generates the linking of the NCs via the Cu2+ ions in acidic pH, and a parallel fluorescence quenching occurs. In the case of Fe3+, the degree of quenching strongly depends on the metal ion concentration, and it only occurs when the NCs are not able to bind more Fe3+ (~10 µM) on the surface, causing the NCs' aggregation.
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Affiliation(s)
- Gyöngyi Gombár
- MTA-SZTE Lendület "Momentum" Noble Metal Nanostructures Research Group, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
| | - Ditta Ungor
- MTA-SZTE Lendület "Momentum" Noble Metal Nanostructures Research Group, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
| | - István Szatmári
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
- Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| | - Ádám Juhász
- MTA-SZTE Lendület "Momentum" Noble Metal Nanostructures Research Group, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Center, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
| | - Edit Csapó
- MTA-SZTE Lendület "Momentum" Noble Metal Nanostructures Research Group, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Center, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich B. sqr. 1, H-6720 Szeged, Hungary
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42
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Ren W, Li J, Zu B, Lei D, Dou X. Design of Highly Efficient Electronic Energy Transfer in Functionalized Quantum Dots Driven Specifically by Ethylenediamine. JACS Au 2024; 4:545-556. [PMID: 38425925 PMCID: PMC10900220 DOI: 10.1021/jacsau.3c00667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/20/2023] [Accepted: 12/26/2023] [Indexed: 03/02/2024]
Abstract
The exploration of emerging functionalized quantum dots (QDs) through modulating the effective interaction between the sensing element and target analyte is of great significance for high-performance trace sensing. Here, the chromone-based ligand grafted QDs (QDs-Chromone) were initiated to realize the electronic energy transfer (EET) driven specifically by ethylenediamine (EDA) in the absence of spectral overlap. The fluorescent and colorimetric dual-mode responses (from red to blue and from colorless to yellow, respectively) resulting from the expanded conjugated ligands reinforced the analytical selectivity, endowing an ultrasensitive and specific response to submicromolar-liquid of EDA. In addition, a QDs-Chromone-based sensing chip was constructed to achieve the ultrasensitive recognition of EDA vapor with a naked-eye observed response at a concentration as low as 10 ppm, as well as a robust anti-interfering ability in complicated scenarios monitoring. We expect the proposed EET strategy in shaping functionalized QDs for high-performance sensing will shine light on both rational probe design methodology and deep sensing mechanism exploration.
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Affiliation(s)
- Wenfei Ren
- Xinjiang
Key Laboratory of Trace Chemicals Sensing, Xinjiang Technical Institute
of Physics & Chemistry, Chinese Academy
of Sciences, Urumqi 830011, China
- Center
of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiguang Li
- Xinjiang
Key Laboratory of Trace Chemicals Sensing, Xinjiang Technical Institute
of Physics & Chemistry, Chinese Academy
of Sciences, Urumqi 830011, China
| | - Baiyi Zu
- Xinjiang
Key Laboratory of Trace Chemicals Sensing, Xinjiang Technical Institute
of Physics & Chemistry, Chinese Academy
of Sciences, Urumqi 830011, China
- Key
Laboratory of Improvised Explosive Chemicals for State Market Regulation, Urumqi 830011, China
| | - Da Lei
- Xinjiang
Key Laboratory of Trace Chemicals Sensing, Xinjiang Technical Institute
of Physics & Chemistry, Chinese Academy
of Sciences, Urumqi 830011, China
- Key
Laboratory of Improvised Explosive Chemicals for State Market Regulation, Urumqi 830011, China
| | - Xincun Dou
- Xinjiang
Key Laboratory of Trace Chemicals Sensing, Xinjiang Technical Institute
of Physics & Chemistry, Chinese Academy
of Sciences, Urumqi 830011, China
- Center
of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key
Laboratory of Improvised Explosive Chemicals for State Market Regulation, Urumqi 830011, China
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Luo ML, Chen GY, Wang JL, Chai TQ, Qian ZM, Li WJ, Yang FQ. Detection of Arsenic(V) by Fluorescence Sensing Based on Chlorin e6-Copper Ion. Molecules 2024; 29:1015. [PMID: 38474527 DOI: 10.3390/molecules29051015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/23/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
The high toxicity of arsenic (As) can cause irreversible harm to the environment and human health. In this study, the chlorin e6 (Ce6), which emits fluorescence in the infrared region, was introduced as the luminescence center, and the addition of copper ion (Cu2+) and As(V) provoked a regular change in fluorescence at 652 nm, whereas that of As(III) was 665 nm, which was used to optionally detect Cu2+, arsenic (As(III), and As(V)). The limit of detection (LOD) values were 0.212 μM, 0.089 ppm, and 1.375 ppb for Cu2+, As(III), and As(V), respectively. The developed method can be used to determine Cu2+ and arsenic in water and soil with good sensitivity and selectivity. The 1:1 stoichiometry of Ce6 with Cu2+ was obtained from the Job plot that was developed from UV-visible spectra. The binding constants for Cu2+ and As(V) were established to be 1.248 × 105 M-1 and 2.35 × 1012 M-2, respectively, using B-H (Benesi-Hildebrand) plots. Fluorescence lifetimes, B-H plots, FT-IR, and 1H-NMR were used to postulate the mechanism of Cu2+ fluorescence quenching and As(V) fluorescence restoration and the interactions of the two ions with the Ce6 molecule.
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Affiliation(s)
- Mao-Ling Luo
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Guo-Ying Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Jia-Li Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Tong-Qing Chai
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Zheng-Ming Qian
- Dongguan HEC Cordyceps R&D Co., Ltd., Dongguan 523850, China
| | - Wen-Jia Li
- Dongguan HEC Cordyceps R&D Co., Ltd., Dongguan 523850, China
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
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Ramapriyan R, Clark VE, Martinez-Lage M, Hsueh B, Nahed BV, Curry WT, Choi BD, Carter BS. Fluorescence and immune-cell infiltration of nonneoplastic, postbrachytherapy brain tissue in 5-ALA-guided resection of recurrent anaplastic meningioma: illustrative case. J Neurosurg Case Lessons 2024; 7:CASE23550. [PMID: 38408351 PMCID: PMC10901117 DOI: 10.3171/case23550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 12/06/2023] [Indexed: 02/28/2024]
Abstract
BACKGROUND 5-Aminolevulinic acid (5-ALA) fluorescence-guided surgery is a well-established technique for resecting high-grade gliomas. However, its application in meningiomas, especially those previously treated with radiation therapy, remains under investigation. OBSERVATIONS A 48-year-old female with recurrent anaplastic meningioma, World Health Organization grade 3, underwent a right-sided craniotomy using off-label 5-ALA as a surgical adjunct. The patient had previously undergone brachytherapy seed implantation (20 × cesium 131) for tumor management. During the surgery, a large fluorescent tumor mass adjacent to the brachytherapy-treated area was resected, and the prior brachytherapy seeds were removed. Interestingly, the surrounding brain tissue in the irradiated area showed robust 5-ALA fluorescence. Pathological examination confirmed that the fluorescent brain tissue was nonneoplastic and associated with lymphocyte and macrophage infiltration. LESSONS This case report presents unique 5-ALA fluorescence in nonneoplastic tissue following brachytherapy, which was found during the resection of recurrent anaplastic meningioma. This phenomenon may reflect an intricate interplay among radiation therapy, immune cells, the tumor microenvironment, and 5-ALA metabolism. Given that false-positive findings in fluorescence-guided surgery can lead to unnecessary tissue resection and increased surgical morbidity, further research is warranted to elucidate the mechanisms underlying this phenomenon and its implications for meningioma surgery.
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Affiliation(s)
- Rishab Ramapriyan
- 1Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts; and
| | | | - Maria Martinez-Lage
- 2Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts
| | | | | | - William T Curry
- 1Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts; and
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Fiorillo C, Quero G, Mascagni P, Alfieri S. Editorial: New technological frontiers in the diagnosis and treatment of gastrointestinal cancers. Front Med (Lausanne) 2024; 11:1362631. [PMID: 38463492 PMCID: PMC10920209 DOI: 10.3389/fmed.2024.1362631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/08/2024] [Indexed: 03/12/2024] Open
Affiliation(s)
| | - Giuseppe Quero
- Agostino Gemelli University Polyclinic (IRCCS), Rome, Italy
- Faculty of Medicine, Università Cattolica del Sacro Cuore di Roma, Rome, Italy
| | - Pietro Mascagni
- Agostino Gemelli University Polyclinic (IRCCS), Rome, Italy
- Institut de Chirurgie Guidée par l'Image (IHU), Strasbourg, France
| | - Sergio Alfieri
- Agostino Gemelli University Polyclinic (IRCCS), Rome, Italy
- Faculty of Medicine, Università Cattolica del Sacro Cuore di Roma, Rome, Italy
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Trinh N, Bhuskute KR, Varghese NR, Buchanan JA, Xu Y, McCutcheon FM, Medcalf RL, Jolliffe KA, Sunde M, New EJ, Kaur A. A Coumarin-Based Array for the Discrimination of Amyloids. ACS Sens 2024; 9:615-621. [PMID: 38315454 DOI: 10.1021/acssensors.3c01334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Self-assembly of misfolded proteins can lead to the formation of amyloids, which are implicated in the onset of many pathologies including Alzheimer's disease and Parkinson's disease. The facile detection and discrimination of different amyloids are crucial for early diagnosis of amyloid-related pathologies. Here, we report the development of a fluorescent coumarin-based two-sensor array that is able to correctly discriminate between four different amyloids implicated in amyloid-related pathologies with 100% classification. The array was also applied to mouse models of Alzheimer's disease and was able to discriminate between samples from mice corresponding to early (6 months) and advanced (12 months) stages of Alzheimer's disease. Finally, the flexibility of the array was assessed by expanding the analytes to include functional amyloids. The same two-sensor array was able to correctly discriminate between eight different disease-associated and functional amyloids with 100% classification.
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Affiliation(s)
- Natalie Trinh
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Kaustubh R Bhuskute
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Melbourne, Victoria 3052, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Monash University, Melbourne, Victoria 3052, Australia
| | - Nikhil R Varghese
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jessica A Buchanan
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Yijia Xu
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Melbourne, Victoria 3052, Australia
| | - Fiona M McCutcheon
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria 3004, Australia
| | - Robert L Medcalf
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria 3004, Australia
| | - Katrina A Jolliffe
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Margaret Sunde
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Elizabeth J New
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Amandeep Kaur
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Melbourne, Victoria 3052, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Monash University, Melbourne, Victoria 3052, Australia
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47
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Bharti, Nair MS. Molecular cloning, biophysical and in silico studies of Human papillomavirus 33 E2 DNA binding domain. J Biomol Struct Dyn 2024:1-20. [PMID: 38385450 DOI: 10.1080/07391102.2024.2317996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/07/2024] [Indexed: 02/23/2024]
Abstract
Human papillomavirus 33, a high-risk HPV strain, is mainly responsible for HPV infection and cervical cancer in Asian countries. The E2 protein of HPV 33 is a DNA-binding protein that plays a crucial role in viral replication and transcription. We have cloned, overexpressed, and purified the DNA binding domain of the E2 protein. Size exclusion chromatography results suggested that the protein exists in a homodimeric state in the native form. Circular dichroism data showed that the protein has a higher content of β-sheet. The melting temperature obtained from differential scanning calorimetry is 52.59 °C, and the protein is stable at pH 8 and is in a dimeric form at basic pH. The protein is monomeric or unfolded at a very low pH. Chemical denaturation studies suggested that the protein denatured and dissociated simultaneously. The DNA binding activity of the protein was also confirmed and it showed binding affinity in the order of 106 M-1. The protein structure was modeled using homology modeling and other bioinformatic tools. The virtual screening and molecular dynamic simulation studies were performed to find compounds that can act as potent inhibitors against E2 DBD. This study expands the understanding of the conserved structural and binding properties of HPV33 E2 DBD and provides the first report on the characterization of the viral protein.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Bharti
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Haridwar Uttarakhand, India
| | - Maya S Nair
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Haridwar Uttarakhand, India
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Deriabina A, Prutskij T, Morales Ochoa HD, Gonzalez Jimenez E, Deriabin S. Comparative Analysis of Fluorescence Emission in Myricetin, Kaempferol, and Quercetin Powders and Solutions. Int J Mol Sci 2024; 25:2558. [PMID: 38473805 DOI: 10.3390/ijms25052558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 03/14/2024] Open
Abstract
Myricetin is a flavonol with high antioxidant properties. In this research, the fluorescence emission of myricetin powder and its solutions in different solvents were measured and analyzed by comparing with the results of calculations. Comparison of the calculated and measured characteristic wavelengths allowed the identification of all the spectral features in the fluorescence spectra of myricetin powder and solutions with different concentrations. The computation was based on modeling the process of the excited state intermolecular proton transfer, which predicts the formation of tautomeric forms of the flavonol molecule. Characteristic emission wavelengths were obtained using TDDFT/M06-2X/6-31++G(d,p). To understand the influence of the hydroxyl groups in the B-ring of the flavonol molecule on the emission spectrum, we also compared the fluorescence spectra of myricetin with those of kaempferol and quercetin. Moreover, based on the analysis of the changes in the shape of the FL spectra with the concentration of the solution, a criterion for the complete dissolution of the flavonol powders was established, which is important for bioavailability of flavonoids.
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Affiliation(s)
- Alexandra Deriabina
- Faculty of Physical and Mathematical Sciences, Autonomous University of Puebla (BUAP), Puebla 72570, Mexico
| | - Tatiana Prutskij
- Sciences Institute, Autonomous University of Puebla (BUAP), Puebla 72570, Mexico
| | | | - Eduardo Gonzalez Jimenez
- Faculty of Physical and Mathematical Sciences, Autonomous University of Puebla (BUAP), Puebla 72570, Mexico
| | - Sergei Deriabin
- Institute for Biological Instrumentation, Pushchino 142290, Russia
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49
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Hattori Y, Yamamoto K, Kitajima R, Uchida K. Bright Fluorescent p-Phenylene-bridged Triarylmethyl Highly Stable Diradical. Chemistry 2024:e202304124. [PMID: 38380885 DOI: 10.1002/chem.202304124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 02/22/2024]
Abstract
Two units of highly stable luminescent triarylmethyl radical, (3,5-dichloro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (PyBTM), were bridged by p-phenylene linker. The photoluminescence quantum yield (PLQY) of PyBTM-PhPyBTM was at most 0.4 % in various organic solvents. Adding two mesityl groups on the terminals did not improve the PLQY. In the MesPyBTM-PhPyBTM-Mes, the mesityl group did not worked as an electron donor unlike the previously reported monoradical MesPyBTM. However, adding two n-hexyl groups on the bridging p-phenylene did greatly improve it, and the PLQY of the PyBTM-(Hex2 Ph)PyBTM was 7 % in dichloromethane and acetone, and 12 % in poly(methyl methacrylate) (PMMA) film. Twisting p-phenylene linker by hexyl groups hindered the π-conjugation and suppressed the non-radiative decay of the excited state.
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Affiliation(s)
- Yohei Hattori
- Materials Chemistry Course, Faculty of Advanced Science and Technology, Ryukoku University Seta, Otsu, Shiga, 520-2194, Japan
| | - Kohei Yamamoto
- Materials Chemistry Course, Faculty of Advanced Science and Technology, Ryukoku University Seta, Otsu, Shiga, 520-2194, Japan
| | - Ryota Kitajima
- Materials Chemistry Course, Faculty of Advanced Science and Technology, Ryukoku University Seta, Otsu, Shiga, 520-2194, Japan
| | - Kingo Uchida
- Materials Chemistry Course, Faculty of Advanced Science and Technology, Ryukoku University Seta, Otsu, Shiga, 520-2194, Japan
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50
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Ivakhnenko E, Malay V, Knyazev P, Merezhko N, Makarova N, Demidov O, Borodkin G, Starikov A, Minkin V. Facile approach to N,O,S-heteropentacycles via condensation of sterically crowded 3 H-phenoxazin-3-one with ortho-substituted anilines. Beilstein J Org Chem 2024; 20:336-345. [PMID: 38410782 PMCID: PMC10896220 DOI: 10.3762/bjoc.20.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 02/09/2024] [Indexed: 02/28/2024] Open
Abstract
A convenient method for the synthesis of a series of 2-(arylamino)-3H-phenoxazin-3-ones based on the nucleophilic substitution reaction between sterically crowded 3H-phenoxazin-3-one and arylamines performed by short-term heating of the melted reactants at 220-250 °C is described, and the compounds were characterized by means of single-crystal X-ray crystallography, NMR, UV-vis, and IR spectroscopy, as well as cyclic voltammetry. The reaction with o-amino-, o-hydroxy-, and o-mercapto-substituted arylamines widened the scope and provided an access to derivatives of N,O- and N,S-heteropentacyclic quinoxalinophenoxazine, triphenodioxazine and oxazinophenothiazine systems.
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Affiliation(s)
- Eugeny Ivakhnenko
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Vasily Malay
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Pavel Knyazev
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Nikita Merezhko
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Nadezhda Makarova
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Oleg Demidov
- North Caucasus Federal University, 1 Pushkin St., 355017, Stavropol, Russian Federation
| | - Gennady Borodkin
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Andrey Starikov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
| | - Vladimir Minkin
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090, Rostov-on-Don, Russian Federation
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