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Hormozi Jangi SR. Developing a label-free full-range highly selective pH nanobiosensor using a novel high quantum yield pH-responsive activated-protein-protected gold nanocluster prepared by a novel ultrasonication-protein-assisted procedure. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124829. [PMID: 39018671 DOI: 10.1016/j.saa.2024.124829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/02/2024] [Accepted: 07/13/2024] [Indexed: 07/19/2024]
Abstract
A novel, label-free, ultra-selective, reproducible, and reversible pH nanobiosensor was developed for analyzing biofluids, food samples, and real water media utilizing a novel activated-protein-protected gold nanocluster with an ultra-narrow emission band, termed as ABSA-AuNCs. The ABSA-AuNCs were synthesized via a novel ultrasonication-protein-assisted procedure, for the first time, using activated bovine serum albumin as both capping and reducing agents. The ABSA-AuNCs revealed a highly narrow symmetric emission spectrum (λmax = 330.0 nm upon excitation at 312-317 nm), and a highly narrow size distribution of 2.9-3.7 nm along with an enhanced quantum yield of 28.3 %. At present, with a full width at half maximum (FWHM) of 14.0 nm, ABSA-AuNCs have the narrowest bandwidth of fluorescent nanomaterials reported to date. The ABSA-AuNCs were characterized for their stability, size, morphology, crystallinity, structural, and optical properties. The ABSA-AuNCs were found to be appropriate for constructing a label-free ultraselective pH nanobiosensor. A linear range over 2.0-11.0, fast response time of less than 5 s, and long-term stability of 99.7 % after 500 min were achieved. The %RSD for repeatability, intra-day reproducibility, and inter-day reproducibility was found to be 1.4 %, 1.7 %, and 2.3 %, in order, to reveal high repeatable and reproducible results. The selectivity of the pH biosensor was evaluated upon the addition of different interferents, indicating an excellent pH selectivity for the ABSA-AuNCs. Real sample analysis proved the feasibility of the ABSA-AuNCs for accurate, precise, and reliable pH sensing in biofluids (undiluted blood and urine), a variety of food samples, and several real water samples.
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Mito D, Eda H, Okihara SI, Kurita M, Hatayama N, Yoshino Y, Watanabe Y, Ishii K. Optimizing Excitation Light for Accurate Rapid Bacterial Species Identification with Autofluorescence. J Fluoresc 2024; 34:1737-1745. [PMID: 37597134 DOI: 10.1007/s10895-023-03383-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 08/06/2023] [Indexed: 08/21/2023]
Abstract
Rapid identification of bacterial species in patient samples is essential for the treatment of infectious diseases and the economics of health care. In this study, we investigated an algorithm to improve the accuracy of bacterial species identification with fluorescence spectroscopy based on autofluorescence from bacteria, and excitation wavelengths suitable for identification. The diagnostic accuracy of each algorithm for ten bacterial species was verified in a machine learning classifier algorithm. The three machine learning algorithms with the highest diagnostic accuracy, extra tree (ET), logistic regression (LR), and multilayer perceptron (MLP), were used to determine the number and wavelength of excitation wavelengths suitable for the diagnosis of bacterial species. The key excitation wavelengths for the diagnosis of bacterial species were 280 nm, 300 nm, 380 nm, and 480 nm, with 280 nm being the most important. The median diagnostic accuracy was equivalent to that of 200 excitation wavelengths when two excitation wavelengths were used for ET and LR, and three excitation wavelengths for MLP. These results demonstrate that there is an optimum wavelength range of excitation wavelengths required for spectroscopic measurement of bacterial autofluorescence for bacterial species identification, and that measurement of only a few wavelengths in this range is sufficient to achieve sufficient accuracy for diagnosis of bacterial species.
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Affiliation(s)
- Daisuke Mito
- The Graduate School for the Creation of New Photonics Industries, Shizuoka, 431-1202, Japan.
- Trauma and Reconstruction Center, Teikyo University Hospital, Tokyo, Japan.
| | - Hideo Eda
- The Graduate School for the Creation of New Photonics Industries, Shizuoka, 431-1202, Japan
| | - Shin-Ichiro Okihara
- The Graduate School for the Creation of New Photonics Industries, Shizuoka, 431-1202, Japan
| | - Masakazu Kurita
- Department of Plastic and Reconstructive Surgery, the University of Tokyo Hospital, Tokyo, Japan
| | - Nami Hatayama
- School of Medicine, Department of Microbiology and Immunology, Teikyo University, Tokyo, Japan
| | - Yusuke Yoshino
- School of Medicine, Department of Microbiology and Immunology, Teikyo University, Tokyo, Japan
| | - Yoshinobu Watanabe
- Trauma and Reconstruction Center, Teikyo University Hospital, Tokyo, Japan
| | - Katsuhiro Ishii
- The Graduate School for the Creation of New Photonics Industries, Shizuoka, 431-1202, Japan
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3
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Alom SE, Swaminathan K, Nuzelu V, Singh A, de Rocquigny H, Swaminathan R. Label-Free Tracking of Hepatitis B Virus Core Protein Capsid Assembly in Real-Time Using Protein Charge Transfer Spectra. Biomacromolecules 2024. [PMID: 38900297 DOI: 10.1021/acs.biomac.4c00521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Hepatitis B virions are double-shelled particles, with a diameter of 40-42 nm, consisting of a nucleocapsid called the HBV core protein (HBV Cp). It is an ordered assembly of 90-120 homodimers arranged in an icosahedral symmetry. Both the full-length HBV Cp and the first-149 residue domain, HBV Cp149, can spontaneously assemble in vitro into capsids with 120 Cp dimers (T = 4) or 90 Cp dimers (T = 3), triggered by high ionic strength of 0.25-0.5 M NaCl. The assembly disassembly of HBV Cp149 capsids are generally studied by light scattering, size-exclusion chromatography, atomic force microscopy, transmission electron microscopy, and other high-end expensive techniques. Here, we report a simple, yet robust, label-free technique exploiting protein charge transfer spectra (ProCharTS) to monitor the capsid assembly in real-time. ProCharTS absorption in the near UV-visible region (250-800 nm) arises when photoinduced electron transfer occurs from HOMO of COO- in glutamate (donor) to LUMO of NH3+ in lysine or polypeptide backbone (acceptor) of the protein. Alternatively, it can also occur from polypeptide backbone (donor) to acceptor in arginine, histidine, or lysine cation. ProCharTS is observed profusely among proximal charge clusters in folded proteins. Here, we show that, ProCharTS absorption among growing HBV capsids is amplified when HBV Cp homodimers assemble, generating new contacts among charged residues in the dimer-dimer interface. We notice a time-dependent sigmoidal increase in ProCharTS absorbance and luminescence during capsid formation in comparison to pure dimers. Additionally, a combined approach of anisotropy-based fluorescence assay is reported, where an increased fluorescence anisotropy was observed in capsids as compared to native and unfolded dimers. We conclude that ProCharTS can serve as a sensitive label-free tool for rapid tracking of capsid assembly in real-time and characterize the assembled capsids from dimers.
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Affiliation(s)
- Shah Ekramul Alom
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Karthik Swaminathan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - V Nuzelu
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Alka Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Hugues de Rocquigny
- Morphogenesis and Antigenicity of HIV, Hepatitis and Emerging Viruses MAVIVIHe, Inserm─U1259 MAVIVH, Tours 37032, France
| | - Rajaram Swaminathan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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4
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Mignon J, Leyder T, Mottet D, Uversky VN, Michaux C. In-depth investigation of the effect of pH on the autofluorescence properties of DPF3b and DPF3a amyloid fibrils. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 313:124156. [PMID: 38508075 DOI: 10.1016/j.saa.2024.124156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/10/2024] [Accepted: 03/12/2024] [Indexed: 03/22/2024]
Abstract
Double PHD fingers 3 (DPF3) protein exists as two splicing variants, DPF3b and DPF3a, the involvement of which in human cancer and neurodegeneration is beginning to be increasingly recognised. Both isoforms have recently been identified as intrinsically disordered proteins able to undergo amyloid fibrillation. Upon their aggregation, DPF3 proteins exhibit an intrinsic fluorescence in the visible range, referred to as deep-blue autofluorescence (dbAF). Comprehension of such phenomenon remaining elusive, we investigated in the present study the influence of pH on the optical properties of DPF3b and DPF3a fibrils. By varying the excitation wavelength and the pH condition, the two isoforms were revealed to display several autofluorescence modes that were defined as violet, deep-blue, and blue-green according to their emission range. Complementarily, analysis of excitation spectra and red edge shift plots allowed to better decipher their photoselection mechanism and to highlight isoform-specific excitation-emission features. Furthermore, the observed violation to Kasha-Vavilov's rule was attributed to red edge excitation shift effects, which were impacted by pH-mediated H-bond disruption, leading to changes in intramolecular charge and proton transfer, or π-electrons delocalisation. Finally, emergence of different autofluorescence emitters was likely related to structurally distinct fibrillar assemblies between isoforms, as well as to discrepancies in the amino acid composition of their aggregation prone regions.
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Affiliation(s)
- Julien Mignon
- Laboratoire de Chimie Physique des Biomolécules, UCPTS, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; Namur Institute of Structured Matter (NISM), University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; Namur Research Institute for Life Sciences (NARILIS), University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium.
| | - Tanguy Leyder
- Laboratoire de Chimie Physique des Biomolécules, UCPTS, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium.
| | - Denis Mottet
- Gene Expression and Cancer Laboratory, GIGA-Molecular Biology of Diseases, University of Liège, B34, Avenue de l'Hôpital, 4000 Liège, Belgium.
| | - Vladimir N Uversky
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.
| | - Catherine Michaux
- Laboratoire de Chimie Physique des Biomolécules, UCPTS, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; Namur Institute of Structured Matter (NISM), University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; Namur Research Institute for Life Sciences (NARILIS), University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium.
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Tarighat MA, Naamdar F. PLSR-colorimetric simultaneous determination of L-Tyrosine and L-Tryptophan in different pharmaceutical and biological samples using one-pot synthesized leaf shape Ag@Ag 2O core-shell nanocomposites modified by β-CD. J Pharm Biomed Anal 2024; 241:115942. [PMID: 38290190 DOI: 10.1016/j.jpba.2023.115942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/06/2023] [Accepted: 12/23/2023] [Indexed: 02/01/2024]
Abstract
In the present study, a simple, innovative, and economically beneficial method has been proposed for the synthesis of Ag@Ag2O core-shell nanocomposites using Acanthophora muscoides algae extract. The host-guest recognition of targets was performed by modification of the Ag@Ag2O surface using β-CD. The Ag@Ag2O- β-CD NCs were used as a colorimetric sensor to determine L-Tryptophan and L-Tyrosine using a partial least square (PLS) approach. A crystalline hybrid structure of Ag core and an Ag2O shell was confirmed by XRD, FTIR, TEM and AFM research. Also, DLS analysis and surface zeta potential spectra illustrated the aggregated nature of nanocomposites in the presence of analytes. The literature review shows that the colorimetric simultaneous determination of L-Tryptophan (L-Try) and L-Tyrosine (L-Tyr) has not been reported. The Ag@Ag2O- β-CD sensor exhibited outstanding sensing capability in a broad linear range of 2.0 -200 μM for both amino acids and low detection limit of 0.32 and 0.51 μM, for L-Try and L-Tyr, respectively. The good sensitivity and excellent selectivity regarding possible interfering species, originated from the synergistic effect of host-guest recognition in combination with colorimetric sensing. Additionally, determination of analytes in various pharmaceutical, supplement and urine samples, approved the practical applicability of the constructed sensor. The computed results confirmed that colorimetric sensing in conjunction with a PLS technique was appropriate for the precise and accurate simultaneous determination of target amino acids in complex mixtures with RMSEP less than 2.5% and recovery in the range of 103-108% with R.S.D. values less than 3%.
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Affiliation(s)
- Maryam Abbasi Tarighat
- Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr 75169, Iran.
| | - Fatemeh Naamdar
- Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr 75169, Iran
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Alom SE, Kalita S, Kawa AH, Mandal B, Swaminathan R. Early events during the aggregation of Aβ 16-22-derived switch-peptides tracked using Protein Charge Transfer Spectra. Anal Chim Acta 2024; 1297:342374. [PMID: 38438229 DOI: 10.1016/j.aca.2024.342374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 01/21/2024] [Accepted: 02/13/2024] [Indexed: 03/06/2024]
Abstract
BACKGROUND Understanding Aβ aggregation and inhibiting it at early stages is of utmost importance in treating Alzheimer's and other related amyloidogenic diseases. However, majority of the techniques to study Aβ aggregation mainly target the late stages; while those used to monitor early stages are either expensive, use extrinsic dyes, or do not provide information on molecular level interactions. Here, we investigate the early events of Aβ16-22(KLVFFAE) aggregation using Aβ16-22 derived switch-peptides (SwPs) through a novel label-free approach employing Protein Charge Transfer Spectra (ProCharTS). RESULTS When pH is increased from 2 to 7.2, the Aβ-derived switch peptides undergo controlled self-assembly, where the initial random coil peptides convert into β-sheet. We leveraged the intrinsic absorbance/luminescence arising from ProCharTS among growing peptide oligomers to observe the aggregation kinetics in real-time. In comparison to monomer, the lysine and glutamate headgroups in the peptide oligomer are expected to come in proximity enhancing ProCharTS intensity due to photoinduced electron transfer. With a combination of Aβ-derived switch-peptides and ProCharTS, we obtained structural insights on the early stages of Aβ-derived SwP aggregation in four unique peptides. Increase in scatter corrected ProCharTS absorbance (250-500 nm) and luminescence (320-720 nm) along with decreased mean luminescence lifetime (2.3-0.8 ns) characterize the initial stages of aggregation monitored for 1-96 h depending on the peptide. We correlated the results with Circular Dichroism (CD), 8-anilino-1-naphthalenesulfonic acid (ANS) and Thioflavin T (ThT) measurements. SIGNIFICANCE We demonstrate ProCharTS as an intrinsic analytical probe with following advantages over other conventional methods to track aggregation: it is a label-free probe; it's intensity can be measured using a UV-Vis spectrophotometer; it is more sensitive in detecting the early molecular events in aggregation compared to ANS and ThT; and it can provide information on specific contacts made between charged headgroups of Lysine/Glutamate in the oligomer.
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Affiliation(s)
- Shah Ekramul Alom
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Sourav Kalita
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Altaf Hussain Kawa
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Bhubaneswar Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Rajaram Swaminathan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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7
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Natarajan A, Vadrevu LR, Rangan K. DRGD-linked charged EKKE dimeric dodecapeptide: pH-based amyloid nanostructures and their application in lead and uranium binding. RSC Adv 2024; 14:9200-9217. [PMID: 38505393 PMCID: PMC10949120 DOI: 10.1039/d3ra08261j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/04/2024] [Indexed: 03/21/2024] Open
Abstract
Peptides have been reported to undergo self-assembly into diverse nanostructures, influenced by several parameters, including their amino acid sequence, pH, charge, solvent, and temperature. Inspired by natural systems, researchers have developed biomimetic peptides capable of self-assembling into supramolecular functional structures. The present study explored a newly designed peptide sequence, EKKEDRGDEKKE, where E = glutamic acid, K = lysine, D = aspartic acid, G = glycine, and R = arginine, with a metal binding DRGD sequence incorporated between the exclusively charged EKKE peptide. We investigated the formation and the potential of the EKKEDRGDEKKE peptide in retaining the structure and morphology adopted by the individual EKKE peptide. According to a combination of experimental techniques such as thioflavin T fluorescence, field emission-scanning electron microscopy, atomic force microscopy, and circular dichroism, it was evident that the EKKEDRGDEKKE peptide displayed a pH-dependent propensity to adopt amyloid-like structures. Furthermore, the self-assembled entities formed under acidic, basic, and neutral conditions exhibited morphological variations, which resembled that observed for the exclusively charged EKKE peptide. Furthermore, the incorporation of the functional DRGD motif resulted in promising binding to two toxic metal ions, lead (Pb) and uranium (U), as evidenced by a range of spectroscopic techniques, including UV-visible spectroscopy, atomic absorption spectroscopy, fluorescence spectroscopy, and X-ray photoelectron spectroscopy. The use of the amyloid-forming EKKEDRGDEKKE scaffold can also be extended to potential biomedical applications.
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Affiliation(s)
- Aishwarya Natarajan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
| | - Late Ramakrishna Vadrevu
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
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8
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Tang X, Yang T, Yu D, Xiong H, Zhang S. Current insights and future perspectives of ultraviolet radiation (UV) exposure: Friends and foes to the skin and beyond the skin. ENVIRONMENT INTERNATIONAL 2024; 185:108535. [PMID: 38428192 DOI: 10.1016/j.envint.2024.108535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/25/2024] [Accepted: 02/25/2024] [Indexed: 03/03/2024]
Abstract
Ultraviolet (UV) radiation is ubiquitous in the environment, which has been classified as an established human carcinogen. As the largest and outermost organ of the body, direct exposure of skin to sunlight or UV radiation can result in sunburn, inflammation, photo-immunosuppression, photoaging and even skin cancers. To date, there are tactics to protect the skin by preventing UV radiation and reducing the amount of UV radiation to the skin. Nevertheless, deciphering the essential regulatory mechanisms may pave the way for therapeutic interventions against UV-induced skin disorders. Additionally, UV light is considered beneficial for specific skin-related conditions in medical UV therapy. Recent evidence indicates that the biological effects of UV exposure extend beyond the skin and include the treatment of inflammatory diseases, solid tumors and certain abnormal behaviors. This review mainly focuses on the effects of UV on the skin. Moreover, novel findings of the biological effects of UV in other organs and systems are also summarized. Nevertheless, the mechanisms through which UV affects the human organism remain to be fully elucidated to achieve a more comprehensive understanding of its biological effects.
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Affiliation(s)
- Xiaoyou Tang
- Medical College of Tibet University, Lasa 850000, China; Laboratory of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Tingyi Yang
- Laboratory of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Daojiang Yu
- Laboratory of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China; The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu 610051, China
| | - Hai Xiong
- Medical College of Tibet University, Lasa 850000, China; West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, China.
| | - Shuyu Zhang
- Medical College of Tibet University, Lasa 850000, China; Laboratory of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China; The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu 610051, China; NHC Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang 621099, China.
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9
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Chen Y, Song Y, Wang X, Tang H, Li C. Genetically engineered virus-like particle-armoured and multibranched DNA scaffold-corbelled ultra-sensitive hierarchical hybridization chain reaction for targeting-enhanced imaging in living biosystems under spatiotemporal light powering. Biosens Bioelectron 2024; 247:115943. [PMID: 38141440 DOI: 10.1016/j.bios.2023.115943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/03/2023] [Accepted: 12/19/2023] [Indexed: 12/25/2023]
Abstract
Although nucleic acids-based fluorescent biosensors, exemplified by the hybridization chain reaction (HCR), have exhibited promise as an imaging tool for detecting disease-related biomolecular makers in living biosystems, they still face certain challenges. These include the need for improved sensitivity, poor bio-targeting capability, the absence of signal enrichment interface and the uncontrollable biosensing initiation. Herein, we present a range of effective solutions. First, a stacking design resembling building blocks is used to construct a special hierarchical HCR (termed H-HCR), for which a hierarchical bridge is employed to graft multiunit HCR products. Furthermore, the H-HCR components are encapsulated into a virus-like particle (VLP) endowed with a naturally peptide-mediated targeting unit through genetic engineering of plasmids, after which the biosensor can specifically identify cancer cytomembranes. By further creating a multibranched DNA scaffold to enrich the H-HCR produced detection signals, the biosensor's analyte recognition module is inserted with a photocleavage-linker, allowing that the biosensing process can be spatiotemporally initiated via a light-powered behavior. Following these innovations, this genetically engineered VLP-armoured and multibranched DNA-scaffold-corbelled H-HCR demonstrates an ultra-sensitive and specific biosensing performance to a cancer-associated microRNA marker (miRNA-155). Beyond the worthy in vitro analysis, our method is also effective in performing imaging assays for such low-abundance analyte in living cells and even bodies, thus providing a roust platform for disease diagnosis.
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Affiliation(s)
- Yaling Chen
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, 430065, PR China
| | - Yongyao Song
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, 430065, PR China; Institute of Infection, Immunology and Tumor Microenvironment, Medical College, Wuhan University of Science and Technology, Wuhan, 430065, PR China
| | - Xiaomei Wang
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, 430065, PR China; Institute of Infection, Immunology and Tumor Microenvironment, Medical College, Wuhan University of Science and Technology, Wuhan, 430065, PR China.
| | - Hongwu Tang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China
| | - Chengyu Li
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, 430065, PR China.
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10
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Ghosal S, Das A, Roy D, Dasgupta J. Tuning light-driven oxidation of styrene inside water-soluble nanocages. Nat Commun 2024; 15:1810. [PMID: 38418497 PMCID: PMC10902312 DOI: 10.1038/s41467-024-45991-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 02/08/2024] [Indexed: 03/01/2024] Open
Abstract
Selective functionalization of innate sp2 C-H bonds under ambient conditions is a grand synthetic challenge in organic chemistry. Here we combine host-guest charge transfer-based photoredox chemistry with supramolecular nano-confinement to achieve selective carbonylation of styrene by tuning the dioxygen concentration. We observe exclusive photocatalytic formation of benzaldehyde under excess O2 (>1 atm) while Markovnikov addition of water produced acetophenone in deoxygenated condition upon photoexcitation of confined styrene molecules inside a water-soluble cationic nanocage. Further by careful tuning of the nanocage size, electronics, and guest preorganization, we demonstrate rate enhancement of benzaldehyde formation and a complete switchover to the anti-Markovnikov product, 2-phenylethan-1-ol, in the absence of O2. Raman spectroscopy, 2D 1H-1H NMR correlation experiments, and transient absorption spectroscopy establish that the site-selective control on the confined photoredox chemistry originates from an optimal preorganization of styrene molecules inside the cavity. We envision that the demonstrated host-guest charge transfer photoredox paradigm in combination with green atom-transfer reagents will enable a broad range of sp2 carbon-site functionalization.
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Affiliation(s)
- Souvik Ghosal
- Department of Chemical Sciences, Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400005, India
| | - Ankita Das
- Department of Chemical Sciences, Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400005, India
| | - Debojyoti Roy
- Department of Chemical Sciences, Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400005, India
| | - Jyotishman Dasgupta
- Department of Chemical Sciences, Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400005, India.
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11
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Wölk C, Shen C, Hause G, Surya W, Torres J, Harvey RD, Bello G. Membrane Condensation and Curvature Induced by SARS-CoV-2 Envelope Protein. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:2646-2655. [PMID: 38258382 PMCID: PMC10851660 DOI: 10.1021/acs.langmuir.3c03079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024]
Abstract
The envelope (E) protein of SARS-CoV-2 participates in virion encapsulation and budding at the membrane of the endoplasmic reticulum Golgi intermediate compartment (ERGIC). The positively curved membrane topology required to fit an 80 nm viral particle is energetically unfavorable; therefore, viral proteins must facilitate ERGIC membrane curvature alteration. To study the possible role of the E protein in this mechanism, we examined the structural modification of the host lipid membrane by the SARS-CoV-2 E protein using synchrotron-based X-ray methods. Our reflectometry results on solid-supported planar bilayers show that E protein markedly condenses the surrounding lipid bilayer. For vesicles, this condensation effect differs between the two leaflets such that the membrane becomes asymmetric and increases its curvature. The formation of such a curved and condensed membrane is consistent with the requirements to stably encapsulate a viral core and supports a role for E protein in budding during SARS-CoV-2 virion assembly.
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Affiliation(s)
- Christian Wölk
- Pharmaceutical
Technology, Medical Faculty, University
Leipzig, Eilenburger
Straße 15a, 04317 Leipzig, Germany
| | - Chen Shen
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Gerd Hause
- Biocenter, Martin-Luther University Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Wahyu Surya
- School
of Biological Sciences, Nanyang Technological
University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Jaume Torres
- School
of Biological Sciences, Nanyang Technological
University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Richard D. Harvey
- Division
of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, UZA 2, Vienna 1090, Austria
| | - Gianluca Bello
- Division
of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, UZA 2, Vienna 1090, Austria
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12
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Cho JL, Allain LG, Yoshida S. Study on the Influence of UV Light on Selective Antibacterial Activity of Silver Nanoparticle Synthesized Utilizing Protein/Polypeptide-Rich Aqueous Extract from The Common Walkingstick, Diapheromera femorata. MATERIALS (BASEL, SWITZERLAND) 2024; 17:713. [PMID: 38591619 PMCID: PMC10856163 DOI: 10.3390/ma17030713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 04/10/2024]
Abstract
Common walkingstick (Diapheromera femorata) aqueous extract (CWSAE) can induce the synthesis of useful bionanomaterials. CWSAE is rich in water-soluble organic compounds such as proteins and polypeptides that function as reducing/stabilizing agents for nanoparticle formation from Ag+ ion precursors. The synthesized AgNPs exhibited a moderately uniform size, with the majority falling within the range of 20-80 nm. These AgNPs were UV-treated and tested as antibacterial agents to inhibit the growth of four pathogenic bacteria (Burkholderia cenocepacia K-56, Klebsiella pneumoniae ST258, Pseudomonas aeruginosa PAO1, and Staphylococcus aureus USA300), as well as one common bacterium (Escherichia coli BW25113). The disk diffusion test demonstrated that the UV-treated AgNPs significantly and selectively inhibited the growth of Staphylococcus aureus USA300 and P. aeruginosa, while showing a small effect on the other two species. This suggests the potential application of green-chemically synthesized AgNPs as selective antibacterial agents. Furthermore, we studied the effects of short-term (1-2 min) and long-term (5-30 min) UV treatment on the selective cytotoxicity of the AgNPs and found that the cytotoxicity of the AgNPs could depend on the duration of UV exposure against certain bacteria.
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Affiliation(s)
| | | | - Sanichiro Yoshida
- Department of Chemistry and Physics, Southeastern Louisiana University, Hammond, LA 70402, USA; (J.L.C.); (L.G.A.)
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13
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Devitt G, Johnson PB, Hanrahan N, Lane SIR, Vidale MC, Sheth B, Allen JD, Humbert MV, Spalluto CM, Hervé RC, Staples K, West JJ, Forster R, Divecha N, McCormick CJ, Crispin M, Hempler N, Malcolm GPA, Mahajan S. Mechanisms of SARS-CoV-2 Inactivation Using UVC Laser Radiation. ACS PHOTONICS 2024; 11:42-52. [PMID: 38249683 PMCID: PMC10797618 DOI: 10.1021/acsphotonics.3c00828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 01/23/2024]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) has had a tremendous impact on humanity. Prevention of transmission by disinfection of surfaces and aerosols through a chemical-free method is highly desirable. Ultraviolet C (UVC) light is uniquely positioned to achieve inactivation of pathogens. We report the inactivation of SARS-CoV-2 virus by UVC radiation and explore its mechanisms. A dose of 50 mJ/cm2 using a UVC laser at 266 nm achieved an inactivation efficiency of 99.89%, while infectious virions were undetectable at 75 mJ/cm2 indicating >99.99% inactivation. Infection by SARS-CoV-2 involves viral entry mediated by the spike glycoprotein (S), and viral reproduction, reliant on translation of its genome. We demonstrate that UVC radiation damages ribonucleic acid (RNA) and provide in-depth characterization of UVC-induced damage of the S protein. We find that UVC severely impacts SARS-CoV- 2 spike protein's ability to bind human angiotensin-converting enzyme 2 (hACE2) and this correlates with loss of native protein conformation and aromatic amino acid integrity. This report has important implications for the design and development of rapid and effective disinfection systems against the SARS-CoV-2 virus and other pathogens.
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Affiliation(s)
- George Devitt
- School
of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Peter B. Johnson
- School
of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Niall Hanrahan
- School
of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Simon I. R. Lane
- School
of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Magdalena C. Vidale
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Bhavwanti Sheth
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Joel D. Allen
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Maria V. Humbert
- Clinical
and Experimental Sciences, Faculty of Medicine, University of Southampton,
Sir Henry Wellcome Laboratories, University
Hospital Southampton, Southampton SO16 6YD, United
Kingdom
- University
of Cambridge, MRC Toxicology Unit, Cambridge, CB2 1QR, United Kingdom
| | - Cosma M. Spalluto
- Clinical
and Experimental Sciences, Faculty of Medicine, University of Southampton,
Sir Henry Wellcome Laboratories, University
Hospital Southampton, Southampton SO16 6YD, United
Kingdom
- Southampton
NIHR Biomedical Research Centre, Southampton
General Hospital, Southampton SO16 6YD, United
Kingdom
| | - Rodolphe C. Hervé
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Karl Staples
- Clinical
and Experimental Sciences, Faculty of Medicine, University of Southampton,
Sir Henry Wellcome Laboratories, University
Hospital Southampton, Southampton SO16 6YD, United
Kingdom
- Wessex Investigational
Sciences Hub, University of Southampton Faculty of Medicine, Southampton General Hospital, Southampton SO16 6YD, United Kingdom
- Southampton
NIHR Biomedical Research Centre, Southampton
General Hospital, Southampton SO16 6YD, United
Kingdom
| | - Jonathan J. West
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Cancer
Sciences, Faculty of Medicine, University
of Southampton, Southampton SO16 6YD, United
Kingdom
| | - Robert Forster
- M Squared
Lasers, Limited, 1 K
Campus, West of Scotland Science Park, Glasgow, G20 0SP, United
Kingdom
| | - Nullin Divecha
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Christopher J. McCormick
- Clinical
and Experimental Sciences, Faculty of Medicine, University of Southampton,
Sir Henry Wellcome Laboratories, University
Hospital Southampton, Southampton SO16 6YD, United
Kingdom
| | - Max Crispin
- School
of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Nils Hempler
- M Squared
Lasers, Limited, 1 K
Campus, West of Scotland Science Park, Glasgow, G20 0SP, United
Kingdom
| | - Graeme P. A. Malcolm
- M Squared
Lasers, Limited, 1 K
Campus, West of Scotland Science Park, Glasgow, G20 0SP, United
Kingdom
| | - Sumeet Mahajan
- School
of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Institute
for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- Department
of Biotechnology, Inland Norway University
of Applied Sciences, Holsetgata 22, N-2317 Hamar, Norway
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14
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Simelane NWN, Abrahamse H. Zinc phthalocyanine loaded- antibody functionalized nanoparticles enhance photodynamic therapy in monolayer (2-D) and multicellular tumour spheroid (3-D) cell cultures. Front Mol Biosci 2024; 10:1340212. [PMID: 38259685 PMCID: PMC10801020 DOI: 10.3389/fmolb.2023.1340212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
In conventional photodynamic therapy (PDT), effective delivery of photosensitizers (PS) to cancer cells can be challenging, prompting the exploration of active targeting as a promising strategy to enhance PS delivery. Typically, two-dimensional (2-D) monolayer cell culture models are used for investigating targeted photodynamic therapy. However, despite their ease of use, these cell culture models come with certain limitations due to their structural simplicity when compared to three-dimensional (3-D) cell culture models such as multicellular tumour spheroids (MCTSs). In this study, we prepared gold nanoparticles (AuNPs) that were functionalized with antibodies and loaded with tetra sulphonated zinc phthalocyanine (ZnPcS4). Characterization techniques including transmission electron microscopy (TEM) was used to determine the size and morphology of the prepared nanoconjugates. We also conducted a comparative investigation to assess the photodynamic effects of ZnPcS4 alone and/or conjugated onto the bioactively functionalized nanodelivery system in colorectal Caco-2 cells cultured in both in vitro 2-D monolayers and 3-D MCTSs. TEM micrographs revealed small, well distributed, and spherical shaped nanoparticles. Our results demonstrated that biofunctionalized nanoparticle mediated PDT significantly inhibited cell proliferation and induced apoptosis in Caco-2 cancer monolayers and, to a lesser extent, in Caco-2 MCTSs. Live/dead assays further elucidated the impact of actively targeted nanoparticle-photosensitizer nanoconstruct, revealing enhanced cytotoxicity in 2-D cultures, with a notable increase in dead cells post-PDT. In 3-D spheroids, however, while the presence of targeted nanoparticle-photosensitizer system facilitated improved therapeutic outcomes, the live/dead results showed a higher number of viable cells after PDT treatment compared to their 2-D monolayer counterparts suggesting that MCTSs showed more resistance to PS drug as compared to 2-D monolayers. These findings suggest a high therapeutic potential of the multifunctional nanoparticle as a targeted photosensitizer delivery system in PDT of colorectal cancer. Furthermore, the choice of cell culture model influenced the response of cancer cells to PDT treatment, highlighting the feasibility of using MCTSs for targeted PS delivery to colorectal cancer cells.
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Affiliation(s)
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, Johannesburg, South Africa
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15
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Song Y, Wang Z, Ji H, Jiang Z, Li X, Du Z, Wei S, Sun Y. Fatty acid modification of casein bioactive peptides nano-assemblies, synthesis, characterization and anticarcinogenic effect. Int J Biol Macromol 2024; 254:127718. [PMID: 37918594 DOI: 10.1016/j.ijbiomac.2023.127718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
In this study, the nano-assemblies of bovine casein hydrolyzed peptides (HP) modified by fatty acids with various alkyl chain lengths (C8, C10, C12 and C14) were synthesized. The physicochemical properties of HP-C8-HP-C14 nano-assemblies were characterized using spectra, laser particle size analyzer, contact angle meter, scanning electron microscope (SEM) and cryo-transmission electron microscope (Cryo-TEM). HP-C8 and HP-C10 self-assembled into a hollow cube cage with an average size of ~500 nm, and the assembly of HP-C12 showed a flower-shaped morphology with more dispersed behavior, and droplet size was observed as ~20 nm. The in vitro cytotoxicity against human breast cancer cells MCF-7 was tested using CCK-8 assay and flow cytometry analysis. HP-C12 showed the highest cytotoxicity for MCF-7 cells with an inhibition rate of 66.03 % ± 0.35 % with an IC50 value of 7.4 μM among HP-Cn. HP-C8, HP-C10 and HP-C12 significantly affected on the migration, invasion and apoptosis of MCF-7 cells. The apoptosis mechanism may depend on the upregulation of anti-apoptotic protein Bcl-2 as well as pro-apoptotic proteins Bax and caspase-8. The dead MCF-7 cells were analyzed with UHPLC-MS/MS using untargeted metabolomics, revealing key metabolic pathways.
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Affiliation(s)
- Yang Song
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Zhichun Wang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Hang Ji
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Zhongyou Jiang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Xiujuan Li
- Pharmaceutical Department, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, China
| | - Zhongyao Du
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Song Wei
- Tumor Precise Intervention and Translational Medicine Laboratory, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, China.
| | - Yang Sun
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China.
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16
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Song JG, Baral KC, Kim GL, Park JW, Seo SH, Kim DH, Jung DH, Ifekpolugo NL, Han HK. Quantitative analysis of therapeutic proteins in biological fluids: recent advancement in analytical techniques. Drug Deliv 2023; 30:2183816. [PMID: 36880122 PMCID: PMC10003146 DOI: 10.1080/10717544.2023.2183816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
Pharmaceutical application of therapeutic proteins has been continuously expanded for the treatment of various diseases. Efficient and reliable bioanalytical methods are essential to expedite the identification and successful clinical development of therapeutic proteins. In particular, selective quantitative assays in a high-throughput format are critical for the pharmacokinetic and pharmacodynamic evaluation of protein drugs and to meet the regulatory requirements for new drug approval. However, the inherent complexity of proteins and many interfering substances presented in biological matrices have a great impact on the specificity, sensitivity, accuracy, and robustness of analytical assays, thereby hindering the quantification of proteins. To overcome these issues, various protein assays and sample preparation methods are currently available in a medium- or high-throughput format. While there is no standard or universal approach suitable for all circumstances, a liquid chromatography-tandem mass spectrometry (LC-MS/MS) assay often becomes a method of choice for the identification and quantitative analysis of therapeutic proteins in complex biological samples, owing to its high sensitivity, specificity, and throughput. Accordingly, its application as an essential analytical tool is continuously expanded in pharmaceutical R&D processes. Proper sample preparation is also important since clean samples can minimize the interference from co-existing substances and improve the specificity and sensitivity of LC-MS/MS assays. A combination of different methods can be utilized to improve bioanalytical performance and ensure more accurate quantification. This review provides an overview of various protein assays and sample preparation methods, with particular emphasis on quantitative protein analysis by LC-MS/MS.
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Affiliation(s)
- Jae Geun Song
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Kshitis Chandra Baral
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Gyu-Lin Kim
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Ji-Won Park
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Soo-Hwa Seo
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Da-Hyun Kim
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Dong Hoon Jung
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Nonye Linda Ifekpolugo
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Hyo-Kyung Han
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
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17
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Mirón GD, Semelak JA, Grisanti L, Rodriguez A, Conti I, Stella M, Velusamy J, Seriani N, Došlić N, Rivalta I, Garavelli M, Estrin DA, Kaminski Schierle GS, González Lebrero MC, Hassanali A, Morzan UN. The carbonyl-lock mechanism underlying non-aromatic fluorescence in biological matter. Nat Commun 2023; 14:7325. [PMID: 37957206 PMCID: PMC10643446 DOI: 10.1038/s41467-023-42874-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Challenging the basis of our chemical intuition, recent experimental evidence reveals the presence of a new type of intrinsic fluorescence in biomolecules that exists even in the absence of aromatic or electronically conjugated chemical compounds. The origin of this phenomenon has remained elusive so far. In the present study, we identify a mechanism underlying this new type of fluorescence in different biological aggregates. By employing non-adiabatic ab initio molecular dynamics simulations combined with a data-driven approach, we characterize the typical ultrafast non-radiative relaxation pathways active in non-fluorescent peptides. We show that the key vibrational mode for the non-radiative decay towards the ground state is the carbonyl elongation. Non-aromatic fluorescence appears to emerge from blocking this mode with strong local interactions such as hydrogen bonds. While we cannot rule out the existence of alternative non-aromatic fluorescence mechanisms in other systems, we demonstrate that this carbonyl-lock mechanism for trapping the excited state leads to the fluorescence yield increase observed experimentally, and set the stage for design principles to realize novel non-invasive biocompatible probes with applications in bioimaging, sensing, and biophotonics.
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Affiliation(s)
- Gonzalo Díaz Mirón
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jonathan A Semelak
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Luca Grisanti
- Division of Theoretical Physics, Ruder Bošković Institute, Zagreb, Croatia
| | - Alex Rodriguez
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | - Irene Conti
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
| | - Martina Stella
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | | | - Nicola Seriani
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | - Nadja Došlić
- Division of Theoretical Physics, Ruder Bošković Institute, Zagreb, Croatia
| | - Ivan Rivalta
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
- ENSL, CNRS, Lyon, France
| | - Marco Garavelli
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
| | - Dario A Estrin
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | | | - Mariano C González Lebrero
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ali Hassanali
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy.
| | - Uriel N Morzan
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy.
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18
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Pilkington TJ, Bignucolo MW, Ainsworth JP, Siemann S. An Excel fitting routine for correcting protein absorption spectra for scatter. Anal Biochem 2023; 678:115269. [PMID: 37543276 DOI: 10.1016/j.ab.2023.115269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 08/07/2023]
Abstract
Protein concentrations are often determined in a non-destructive manner by measuring the absorbance at 280 nm. However, light scattering in protein samples can complicate such assessment. We here describe a simple Excel Solver-based fitting routine to correct full protein UV absorption spectra for both Rayleigh and Mie scattering. Using samples displaying various degrees of natural and artificially induced scattering, we show that our multi-wavelength fitting method is not only capable of aiding in the determination of protein concentrations but can also be employed in the spectral analysis of protein structural changes that are accompanied by alterations in scatter intensity.
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Affiliation(s)
- Tyson J Pilkington
- School of Natural Sciences, Laurentian University, Sudbury, Ontario, Canada
| | | | - Jack P Ainsworth
- School of Natural Sciences, Laurentian University, Sudbury, Ontario, Canada
| | - Stefan Siemann
- School of Natural Sciences, Laurentian University, Sudbury, Ontario, Canada.
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19
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Vera CC, Borsarelli CD. Photo-induced protein modifications: a range of biological consequences and applications. Biophys Rev 2023; 15:569-576. [PMID: 37681095 PMCID: PMC10480124 DOI: 10.1007/s12551-023-01081-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/16/2023] [Indexed: 09/09/2023] Open
Abstract
Proteins are the most abundant biomolecules in living organisms and tissues and are also present in many natural and processed foods and beverages, as well as in pharmaceuticals and therapeutics. When exposed to UV-visible light, proteins containing endogenous or exogenous chromophores can undergo direct and indirect photochemical processes, resulting in protein modifications including oxidation of residues, cross-linking, proteolysis, covalent binding to molecules and interfaces, and conformational changes. When these modifications occur in an uncontrolled manner in a physiological context, they can lead to biological dysfunctions that ultimately result in cell death. However, rational design strategies involving light-activated protein modification have proven to be a valuable tool for the modulation of protein function or even for the construction of new biomaterials. This mini-review describes the fundamentals of photochemical processes in proteins and explores some of their emerging biomedical and nanobiotechnological applications, such as photodynamic therapy (PDT), photobonding for wound healing, photobioprinting, photoimmobilization of biosensors and enzymes for sensing, and biocatalysis, among others.
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Affiliation(s)
- Claudia Cecilia Vera
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET. Universidad Nacional de Santiago del Estero (UNSE), RN 9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Claudio Darío Borsarelli
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET. Universidad Nacional de Santiago del Estero (UNSE), RN 9, Km 1125, G4206XCP Santiago del Estero, Argentina
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20
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Ansari S, Zia MK, Fatima S, Ahsan H, Khan FH. Probing the binding of morin with alpha-2-macroglobulin using multi-spectroscopic and molecular docking approach : Interaction of morin with α 2M. J Biol Phys 2023; 49:235-255. [PMID: 36913165 PMCID: PMC10160284 DOI: 10.1007/s10867-023-09629-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 02/11/2023] [Indexed: 03/14/2023] Open
Abstract
Alpha-2-macroglobulin (α2M) is an essential antiproteinase that is widely distributed in human plasma. The present study was aimed at investigating the binding of a potential therapeutic dietary flavonol, morin, with human α2M using a multi-spectroscopic and molecular docking approach. Recently, flavonoid-protein interaction has gained significant attention, because a majority of dietary bioactive components interact with proteins, thereby altering their structure and function. The results of the activity assay exhibited a 48% reduction in the antiproteolytic potential of α2M upon interaction with morin. Fluorescence quenching tests unequivocally confirmed quenching in the fluorescence of α2M in the presence of morin, conforming complex formation and demonstrating that the binding mechanism involves a dynamic mode of interaction. Synchronous fluorescence spectra of α2M with morin showed perturbation in the microenvironment around tryptophan residues. Furthermore, structural changes were observed through CD and FT-IR, showing alterations in the secondary structure of α2M induced by morin. FRET further supports the results of the dynamic mode of quenching. Moderate interaction is shown by binding constant values using Stern-Volmer's fluorescence spectroscopy. Morin binds to α2M at 298 K with a binding constant of 2.7 × 104 M-1, indicating the strength of the association. The α2M-morin system was found to have negative ΔG values, which suggests that the binding process was spontaneous. Molecular docking also reveals the different amino acid residues involved in this binding process, revealing that the binding energy is -8.1 kcal/mol.
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Affiliation(s)
- Sana Ansari
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Shamila Fatima
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Haseeb Ahsan
- Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, 110025, India
| | - Fahim H Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India.
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21
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Priyadarshi A, Devi HM, Swaminathan R. Disruption of Spatial Proximities among Charged Groups in Equilibrium-Denatured States of Proteins Tracked Using Protein Charge Transfer Spectra. Biochemistry 2023. [PMID: 37162303 DOI: 10.1021/acs.biochem.3c00006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The absorption and luminescence originating from protein charge transfer spectra (ProCharTS) depend on the proximity between multiple charged groups in a protein. This makes ProCharTS absorbance/luminescence intensity a sensitive probe for detecting changes in the protein structure, which alter the proximity among charged groups in the protein. In this work, ProCharTS absorbance of charge-rich proteins like human serum albumin (HSA), α3C, and α3W was used to monitor structural changes upon chemical denaturant-induced protein unfolding under equilibrium conditions. The denaturation midpoints were estimated using nonlinear regression analysis. For HSA, absorbance at 325 and 340 nm estimated the GdnHCl-induced denaturation midpoints to be 0.80 and 0.61 M, respectively. A similar analysis of α3C and α3W ProCharTS absorbance yielded denaturation midpoints of 0.88 and 0.86 M at 325 nm and 0.96 and 0.66 M at 340 nm, respectively. A previously reported molten globule-like state in the GdnHCl-induced HSA unfolding pathway was detected by the increase in HSA ProCharTS absorbance at 0.5 M GdnHCl. To validate the above results, protein unfolding was additionally monitored using conventional methods like circular dichroism (CD), Trp, and dansyl fluorescence. Our results suggest that disruption of charged amino acid sidechain contacts as revealed by ProCharTS occurs at lower denaturant concentrations compared to the loss of secondary/folded structure monitored by CD and fluorescence. Further, HSA ProCharTS absorbance at 315-340 nm revealed that tertiary contacts among charged residues were disrupted at lower GdnHCl concentrations compared to sequence adjacent contacts. Our data underscore the utility of ProCharTS as a novel label-free tool to track unfolding in charge-rich proteins.
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Affiliation(s)
- Anurag Priyadarshi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Himanshi Maniram Devi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Rajaram Swaminathan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
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22
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Balasco N, Diaferia C, Rosa E, Monti A, Ruvo M, Doti N, Vitagliano L. A Comprehensive Analysis of the Intrinsic Visible Fluorescence Emitted by Peptide/Protein Amyloid-like Assemblies. Int J Mol Sci 2023; 24:ijms24098372. [PMID: 37176084 PMCID: PMC10178990 DOI: 10.3390/ijms24098372] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Amyloid aggregation is a widespread process that involves proteins and peptides with different molecular complexity and amino acid composition. The structural motif (cross-β) underlying this supramolecular organization generates aggregates endowed with special mechanical and spectroscopic properties with huge implications in biomedical and technological fields, including emerging precision medicine. The puzzling ability of these assemblies to emit intrinsic and label-free fluorescence in regions of the electromagnetic spectrum, such as visible and even infrared, usually considered to be forbidden in the polypeptide chain, has attracted interest for its many implications in both basic and applied science. Despite the interest in this phenomenon, the physical basis of its origin is still poorly understood. To gain a global view of the available information on this phenomenon, we here provide an exhaustive survey of the current literature in which original data on this fluorescence have been reported. The emitting systems have been classified in terms of their molecular complexity, amino acid composition, and physical state. Information about the wavelength of the radiation used for the excitation as well as the emission range/peak has also been retrieved. The data collected here provide a picture of the complexity of this multifaceted phenomenon that could be helpful for future studies aimed at defining its structural and electronic basis and/or stimulating new applications.
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Affiliation(s)
- Nicole Balasco
- Institute of Molecular Biology and Pathology, National Research Council (CNR), Department of Chemistry, University of Rome Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Carlo Diaferia
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Via Montesano 49, 80131 Naples, Italy
| | - Elisabetta Rosa
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Via Montesano 49, 80131 Naples, Italy
| | - Alessandra Monti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Menotti Ruvo
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Nunzianna Doti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
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23
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Habibi A, Farhadian S, Shareghi B, Hashemi-Shahraki F. Structural change study of pepsin in the presence of spermidine trihydrochloride: Insights from spectroscopic to molecular dynamics methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122264. [PMID: 36652806 DOI: 10.1016/j.saa.2022.122264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/12/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Spermidine is an aliphatic polyamine that directs a set of biological processes. This work aimed to use UV-Vis spectroscopy, fluorescence spectroscopy, thermal stability, kinetic methods, docking, and molecular dynamic simulations to examine the influence of spermidine trihydrochloride (SP) on the structure and function of pepsin. The results of the fluorescence emission spectra indicated that spermidine could quench pepsin's intrinsic emission in a static quenching process, resulting in the formation of the pepsin-spermidine complex. The results discovered that spermidine had a strong affinity to the pepsin structure because of its high binding constant. The obtained results from spectroscopy and molecular dynamic approaches showed the binding interaction between spermidine and pepsin, induced micro-environmental modifications around tryptophan residues that caused a change in the tertiary and secondary structure of the enzyme. FTIR analysis showed hypochromic effects in the spectra of amide I and II and redistribution of the helical structure. Moreover, the molecular dynamic (MD) and docking studies confirmed the experimental data. Both experimental and molecular dynamics simulation results clarified that electrostatic bond interactions were dominant forces.
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Affiliation(s)
- Atefeh Habibi
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P.O. Box 115, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran
| | - Sadegh Farhadian
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P.O. Box 115, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran.
| | - Behzad Shareghi
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P.O. Box 115, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran.
| | - Fatemeh Hashemi-Shahraki
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P.O. Box 115, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran
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24
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Serien D, Narazaki A, Sugioka K. Towards understanding the mechanism of 3D printing using protein: femtosecond laser direct writing of microstructures made from homopeptides. Acta Biomater 2023; 164:139-150. [PMID: 37062438 DOI: 10.1016/j.actbio.2023.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 03/17/2023] [Accepted: 04/06/2023] [Indexed: 04/18/2023]
Abstract
Femtosecond laser direct write (fs-LDW) is a promising technology for three-dimensional (3D) printing due to its high resolution, flexibility, and versatility. A protein solution can be used as a precursor to fabricate 3D proteinaceous microstructures that retain the protein's native function. The large diversity of protein molecules with different native functions allows diverse applications of this technology. However, our limited understanding of the mechanism of the printing process restricts the design and generation of 3D microstructures for biomedical applications. Therefore, we used eight commercially available homopeptides as precursors for fs-LDW of 3D structures. Our experimental results show that tyrosine, histidine, glutamic acid, and lysine contribute more to the fabrication process than do proline, threonine, phenylalanine, and alanine. In particular, we show that tyrosine is highly beneficial in the fabrication process. The beneficial effect of the charged amino acids glutamic acid and lysine suggests that the printing mechanism involves ions in addition to the previously proposed radical mechanism. Our results further suggest that the uneven electron density over larger amino acid molecules is key in aiding fs-LDW. The findings presented here will help generate more desired 3D proteinaceous microstructures by modifying protein precursors with beneficial amino acids. STATEMENT OF SIGNIFICANCE: Femtosecond laser direct write (fs-LDW) offers a three-dimensional (3D) printing capability for creating well-defined micro-and nanostructures. Applying this technology to proteins enables the manufacture of complex biomimetic 3D micro-and nanoarchitectures with retention of their original protein functions. To our knowledge, amino acid homo-polymers themselves have never been used as precursor for fs-LDW so far. Our studygainsseveral new insights into the 3D printing mechanism of pure protein for the first time. We believe that the experimental evidence presented greatly benefits the community of 3D printing of proteinin particular and the biomaterial science community in general. With the gained insight, we aspire toexpand the possibilitiesof biomaterial and biomedical applications of this technique.
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Affiliation(s)
- Daniela Serien
- National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8568, Japan
| | - Aiko Narazaki
- National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8568, Japan
| | - Koji Sugioka
- The Institute of Physical and Chemical Research (RIKEN), Saitama 351-01, Japan
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25
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Siva Prakash R, Chandrasekaran J, Vivek P, Balasubramani V. Improvement of optoelectronic properties of In doped CeO2 thin films for photodiode applications. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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26
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Kataki-Anastasakou A, Jia S, Axtell JC, Sletten EM. A Fluorescent Unnatural Mannosamine Derivative with Enhanced Emission Upon Complexation with Cucurbit[7]uril. Isr J Chem 2023; 63:e202200069. [PMID: 37636996 PMCID: PMC10457038 DOI: 10.1002/ijch.202200069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Indexed: 12/28/2022]
Abstract
Metabolic incorporation of unnatural functionality on glycans has allowed chemical biologists to observe and affect cellular processes. Recent work has resulted in glycan-fluorophore structures that allow for direct visualization of glycan-mediated processes, shining light on their role in living systems. This work describes the serendipitous discovery of a small chemical reporter-fluorophore. Investigations into the mechanism of fluorescence arising from (trimethylsilyl)methylglycine appended on mannosamine suggest rigidity and restriction of lone pair geometry contribute to the fluorescent behaviour. In fact, in situ cyclization and encapsulation in cucurbit[7]uril enhance fluorescence to levels that can be observed in live cells. While the reported unnatural mannosamine does not traverse the sialic acid biosynthetic pathway, this discovery may lead to small, "turn-on" chemical reporters for incorporation in living systems.
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Affiliation(s)
- Anna Kataki-Anastasakou
- Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
| | - Shang Jia
- Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
| | - Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
| | - Ellen M Sletten
- Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
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27
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Aizen R, Arnon ZA, Berger O, Ruggiero A, Zaguri D, Brown N, Shirshin E, Slutsky I, Gazit E. Intrinsic fluorescence of nucleobase crystals. NANOSCALE ADVANCES 2023; 5:344-348. [PMID: 36756258 PMCID: PMC9846435 DOI: 10.1039/d2na00551d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 11/28/2022] [Indexed: 06/18/2023]
Abstract
Nucleobase crystals demonstrate unique intrinsic fluorescence properties in the visible spectral range. This is in contrast to their monomeric counterparts. Moreover, some nucleobases were found to exhibit red edge excitation shift. This behavior is uncommon in the field of organic supramolecular materials and could have implications in fields such as therapeutics of metabolic disorders and materials science.
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Affiliation(s)
- Ruth Aizen
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
| | - Zohar A Arnon
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
| | - Or Berger
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
| | - Antonella Ruggiero
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University Tel Aviv 6997801 Israel
| | - Dor Zaguri
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
| | - Noam Brown
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
| | - Evgeny Shirshin
- Faculty of Physics, M. V. Lomonosov Moscow State University Moscow 119991 Russia
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", I. M. Sechenov First Moscow State Medical University (Sechenov University) 119991 Moscow Russia
| | - Inna Slutsky
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University Tel Aviv 6997801 Israel
| | - Ehud Gazit
- Shmunis School of Biomedicine and Cancer Research, Tel Aviv University Tel Aviv 6997801 Israel
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University Tel Aviv 6997801 Israel
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28
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Kikuchi K, Adair LD, Lin J, New EJ, Kaur A. Photochemical Mechanisms of Fluorophores Employed in Single-Molecule Localization Microscopy. Angew Chem Int Ed Engl 2023; 62:e202204745. [PMID: 36177530 PMCID: PMC10100239 DOI: 10.1002/anie.202204745] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Indexed: 02/02/2023]
Abstract
Decoding cellular processes requires visualization of the spatial distribution and dynamic interactions of biomolecules. It is therefore not surprising that innovations in imaging technologies have facilitated advances in biomedical research. The advent of super-resolution imaging technologies has empowered biomedical researchers with the ability to answer long-standing questions about cellular processes at an entirely new level. Fluorescent probes greatly enhance the specificity and resolution of super-resolution imaging experiments. Here, we introduce key super-resolution imaging technologies, with a brief discussion on single-molecule localization microscopy (SMLM). We evaluate the chemistry and photochemical mechanisms of fluorescent probes employed in SMLM. This Review provides guidance on the identification and adoption of fluorescent probes in single molecule localization microscopy to inspire the design of next-generation fluorescent probes amenable to single-molecule imaging.
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Affiliation(s)
- Kai Kikuchi
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Melbourne, VIC 305, Australia.,School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia.,The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
| | - Liam D Adair
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.,Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Jiarun Lin
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Elizabeth J New
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.,Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Amandeep Kaur
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Melbourne, VIC 305, Australia.,School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia.,The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
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29
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Duan M, Li B, Zhao Y, Liu Y, Liu Y, Dai R, Li X, Jia F. A CRISPR/Cas12a-mediated, DNA extraction and amplification-free, highly direct and rapid biosensor for Salmonella Typhimurium. Biosens Bioelectron 2023; 219:114823. [PMID: 36308834 DOI: 10.1016/j.bios.2022.114823] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 11/19/2022]
Abstract
CRISPR/Cas-based biosensors were typically used for nucleic-acid targets detection and complex DNA extraction and amplification procedures were usually inevitable. Here, we report a CRISPR/Cas12a-mediated, DNA extraction and amplification-free, highly direct and rapid biosensor (abbreviated as "CATCHER") for Salmonella Typhimurium (S. Typhimurium) with a simple (3 steps) and fast (∼2 h) sensing workflow. Magnetic nanoparticle immobilized anti-S. Typhimurium antibody was worked as capture probe to capture the target and provide movable reaction interface. Colloidal gold labeled with anti-S. Typhimurium antibody and DNase I was used as detection probe to bridge the input target and output signal. First, in the presence of S. Typhimurium, an immuno-sandwich structure was formed. Second, DNase I in sandwich structure degraded the valid, complete activator DNA to invalid DNA fragments which can't trigger the trans-cleavage activity of Cas12a. Finally, the integrity of reporter DNA was preserved presenting a low fluorescence signal. Conversely, in the absence of S. Typhimurium, strong fluorescence recovery appeared owing to the cutting of reporter by activated Cas12a. Significantly, the proposed "CATCHER" showed satisfactory detection performance for S. Typhimurium with the limit of detection (LOD) of 7.9 × 101 CFU/mL in 0.01 M PBS and 6.31 × 103 CFU/mL in spiked chicken samples, providing a general platform for non-nucleic acid targets.
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Affiliation(s)
- Miaolin Duan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Bingyan Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yijie Zhao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yana Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yi Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Ruitong Dai
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Xingmin Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China.
| | - Fei Jia
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
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30
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Stagi L, Farris R, de Villiers Engelbrecht L, Mocci F, Maria Carbonaro C, Innocenzi P. At the root of l-lysine emission in aqueous solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 283:121717. [PMID: 35944345 DOI: 10.1016/j.saa.2022.121717] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/28/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
l-lysine is an essential amino acid whose peculiar optical properties in aqueous solutions are still in search of a comprehensive explanation. In crystalline form l-lysine does not emit, but when in an aqueous solution, as the concentration increases, emits in the blue. The origin of such fluorescence is not yet clear. In the present article, we have combined quantum mechanics and classical simulations with experimental techniques to demonstrate that optical absorption and excitation-dependent fluorescence are directly correlated with the formation of aggregates, their dimensions and intermolecular interactions. The nature of the aggregates has been studied as a function of the pH and concentration of the amino acid. At low concentrations, fluorescence intensity increases linearly with molarity, while at high concentrations a new condition is established in which emitting and non-emitting molecular species coexist. The l-lysine aggregation and the formation of intermolecular H-bonding are at the ground of the emission in the blue range.
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Affiliation(s)
- Luigi Stagi
- Laboratory of Materials Science and Nanotechnology, CR-INSTM, Department of Chemical, Physics, Mathematics and Natural Sciences, University of Sassari. Via Vienna 2. 07100 Sassari. Italy
| | - Riccardo Farris
- Department of Chemical and Geological Sciences, University of Cagliari. Sp 8, km 0.700, 09042 Monserrato, CA, Italy
| | - Leon de Villiers Engelbrecht
- Department of Chemical and Geological Sciences, University of Cagliari. Sp 8, km 0.700, 09042 Monserrato, CA, Italy
| | - Francesca Mocci
- Department of Chemical and Geological Sciences, University of Cagliari. Sp 8, km 0.700, 09042 Monserrato, CA, Italy
| | - Carlo Maria Carbonaro
- Department of Physics, University of Cagliari. Sp 8, km 0.700, 09042 Monserrato, CA, Italy
| | - Plinio Innocenzi
- Laboratory of Materials Science and Nanotechnology, CR-INSTM, Department of Biomedical Sciences, University of Sassari, Viale San Pietro 43/B, 07100 Sassari, Italy.
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31
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Polysorbate 21 Can Modulate the Antibacterial Potential of Two Pyrazol Derivatives. Biomolecules 2022; 12:biom12121819. [PMID: 36551246 PMCID: PMC9776004 DOI: 10.3390/biom12121819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/29/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022] Open
Abstract
The combination of two compounds with known antimicrobial activity may, in some cases, be an effective way to limit the resistance to antibiotics of specific pathogens. Molecules carrying pyrazole moiety are well known for their bioactive properties and have wide applicability in the medical and pharmaceutical field. Surfactants have, among other useful properties, the ability to affect the growth of microorganisms. The paper reports on the effect of the combination of two pyrazole derivatives, (1H-pyrazol-1-yl) methanol 1-hydroxymethylpyrazole (SAM1) and 1,1'methandiylbis (1H-pyrazol) (AM1), with sorbitan monolaurate (polysorbate 21, Tween 21, T21) on the growth of Gram-positive and Gram-negative bacteria. The results demonstrated a different ability of this combination to inhibit Staphylococcus aureus and Escherichia coli. T21 intensified the inhibitory activity of the pyrazoles to a greater extent in the Gram-negative bacteria compared to the Gram-positive ones, a fact confirmed by time-kill experiments. The experimental data showed that the association of T21 with the pyrazoles led to the increased release of intracellular material and a more intense uptake of crystal violet, which indicates that the potentiation of the antibacterial effect was based on the modification of the normal permeability of bacterial cells. T21 acted as a modulating factor and increased the permeability of the membrane, allowing the accelerated penetration of the pyrazoles inside the bacterial cells. This fact is important in controlling the global increase in microbial resistance to antibiotics and antimicrobials and finding viable solutions to overcome the antibiotic crisis. The paper highlights the possibility of using non-toxic surfactant molecules in antimicrobial combinations with practical applications. This could widen the range of adjuvants in applications which would be useful in the control of resistant microorganisms.
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32
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Wongkrongsak S, Piroonpan T, Coqueret X, Pasanphan W. Radiation-processed silk fibroin micro- /nano-gels as promising antioxidants: Electron beam treatment and physicochemical characterization. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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33
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Sabitha Mohan MR, Pavithran R, Hubert JI, Sindhu TK, Aswathy P. Chelated Calcium 1D Coordination Polymer: Crystal Growth, Characterization and Z scan studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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34
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Morzan UN, Díaz Mirón G, Grisanti L, González Lebrero MC, Kaminski Schierle GS, Hassanali A. Non-Aromatic Fluorescence in Biological Matter: The Exception or the Rule? J Phys Chem B 2022; 126:7203-7211. [PMID: 36128666 DOI: 10.1021/acs.jpcb.2c04280] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While in the vast majority of cases fluorescence in biological matter has been attributed to aromatic or conjugated groups, peptides associated with neurodegenerative diseases, such as Alzheimer's, Parkinson's, or Huntington's, have been recently shown to display an intrinsic visible fluorescence even in the absence of aromatic residues. This has called the attention of researchers from many different fields, trying to understand the origin of this peculiar behavior and, at the same time, motivating the search for novel strategies to control the optical properties of new biophotonic materials. Today, after nearly 15 years of its discovery, there is a growing consensus about the mechanism underlying this phenomenon, namely, that electronic interactions between non-optically active molecules can result in supramolecular assemblies that are fluorescent. Despite this progress, many aspects of this phenomenon remain uncharted territory. In this Perspective, we lay down the state-of-the-art in the field highlighting the open questions from both experimental and theoretical fronts in this fascinating emerging area of non-aromatic fluorescence.
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Affiliation(s)
- Uriel N Morzan
- International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Gonzalo Díaz Mirón
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, C1053 Buenos Aires, Argentina
| | - Luca Grisanti
- Division of Theoretical Physics, Ruđer Bos̆cković Institute, Bijenic̆ka cesta 54, 10000 Zagreb, Croatia
| | - Mariano C González Lebrero
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, C1053 Buenos Aires, Argentina
| | | | - Ali Hassanali
- International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
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35
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Xiang H, Huang H, Sun-Waterhouse D, Hu X, Li L, Waterhouse GI, Tang R, Xiong J, Cui C. Enzymatically synthesized γ-[Glu](n≥1)-Gln as novel calcium-binding peptides to deliver calcium with enhanced bioavailability. Food Chem 2022; 387:132918. [DOI: 10.1016/j.foodchem.2022.132918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 04/05/2022] [Accepted: 04/05/2022] [Indexed: 11/28/2022]
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Synthesis, physico-chemical characterization, and environmental applications of meso porous crosslinked poly (azomethine-sulfone)s. Sci Rep 2022; 12:12878. [PMID: 35896584 PMCID: PMC9329479 DOI: 10.1038/s41598-022-17042-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/20/2022] [Indexed: 11/09/2022] Open
Abstract
To develop innovative mesoporous crosslinked poly(azomethine- sulfone)s with environmental applications, a simple Schiff base condensation technique based on barbituric acid BA or condensed terephthaldehyde barbituric acid TBA in their structures as monomeric units are applied. Different analysis methodologies and viscosity measurements identify them as having stronger heat stability and an amorphous structure. The photophysical features of the multi stimuli response MSR phenomenon are observable, with white light emission at higher concentrations and blue light emission at lower concentrations. Their emission characteristics make them an excellent metal ions sensor through diverse charge transfer methods. They can have a better inhibition efficiency and be employed as both mixed-type and active corrosion inhibitors according to their fluorescence emission with metals, demonstrating their capacity to bind with diverse metals. The adsorption of two distinct dye molecules, Methylene blue MB cationic and sunset yellow SY anionic, on the mesoporous structures of the polymers is investigated, revealing their selectivity for MB dye adsorption. Quantum studies support these amazing discoveries, demonstrating a crab-like monomeric unit structure for the one that is heavily crosslinked.
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37
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Arunachalam V, Salgaonkar DC, Kevat NV, Walawalkar BV, Das B. Quantification of Betacyanin content variation of amaranth varieties by an Android App, Colorimeter, and Infrared spectroscopy. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Mogany T, Kumari S, Swalaha FM, Bux F. In silico analysis of enzymes involved in mycosporine-like amino acids biosynthesis in Euhalothece sp.: Structural and functional characterization. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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The Use of Excess Electric Charge for Highly Sensitive Protein Detection: Proof of Concept. ELECTRONICS 2022. [DOI: 10.3390/electronics11131955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In highly sensitive bioanalytical systems intended for the detection of protein biomarkers at low and ultra-low concentrations, the efficiency of capturing target biomolecules from the volume of the analyzed sample onto the sensitive surface of the detection system is a crucial factor. Herein, the application of excess electric charge for the enhancement of transport of target biomolecules towards the sensitive surface of a detection system is considered. In our experiments, we demonstrate that an uncompensated electric charge is induced in droplets of protein-free water owing to the separation of charge in a part of the Kelvin dropper either with or without the use of an external electric field. The distribution of an excess electric charge within a protein-free water droplet is calculated. It is proposed that the efficiency of protein capturing onto the sensitive surface correlates with the sign and the amount of charge induced per every single protein biomolecule. The effect described herein can allow one to make the protein capturing controllable, enhancing the protein capturing in the desired (though small) sensitive area of a detector. This can be very useful in novel systems intended for highly sensitive detection of proteins at ultra-low (≤10−15 M) concentrations.
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Mansur AAP, Paiva MRB, Cotta OAL, Silva LM, Carvalho IC, Capanema NSV, Carvalho SM, Costa ÉA, Martin NR, Ecco R, Santos BS, Fialho SL, Lobato ZIP, Mansur HS. Carboxymethylcellulose biofunctionalized ternary quantum dots for subcellular-targeted brain cancer nanotheranostics. Int J Biol Macromol 2022; 210:530-544. [PMID: 35513094 DOI: 10.1016/j.ijbiomac.2022.04.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 11/29/2022]
Abstract
Among the most lethal forms of cancer, malignant brain tumors persist as one of the greatest challenges faced by oncologists, where nanotechnology-driven theranostics can play a critical role in developing novel polymer-based supramolecular nanoarchitectures with multifunctional and multi-modal characteristics to fight cancer. However, it is virtually a consensus that, besides the complexity of active delivering anticancer drugs by the nanocarriers to the tumor site, the current evaluation methods primarily relying on in vitro assays and in vivo animal models have been accounted for the low translational effectiveness to clinical applications. In this view, the chick chorioallantoic membrane (CAM) assay has been increasingly recognized as one of the best preclinical models to study the effects of anticancer drugs on the tumor microenvironment (TME). Thus, in this study, we designed, characterized, and developed novel hybrid nanostructures encompassing chemically functionalized carboxymethylcellulose (CMC) with mitochondria-targeting pro-apoptotic peptide (KLA) and cell-penetrating moiety (cysteine, CYS) with fluorescent inorganic semiconductor (Ag-In-S, AIS) for simultaneously bioimaging and inducing glioblastoma cancer cell (U-87 MG, GBM) death. The results demonstrated that the CMC-peptide macromolecules produced supramolecular vesicle-like nanostructures with aqueous colloidal stability suitable as nanocarriers for passive and active targeting of cancer tumors. The optical properties and physicochemical features of the nanoconjugates confirmed their suitability as photoluminescent nanoprobes for cell bioimaging and intracellular tracking. Moreover, the results in vitro demonstrated a notable killing activity towards GBM cells of cysteine-bearing CMC conjugates coupled with pro-apoptotic KLA peptides. More importantly, compared to doxorubicin (DOX), a model anticancer drug in chemotherapy that is highly toxic, these innovative nanohybrids nanoconjugates displayed higher lethality against U-87 MG cancer cells. In vivo CAM assays validated these findings where the nanohybrids demonstrated a significant reduction of GBM tumor progression (41% area) and evidenced an antiangiogenic activity. These results pave the way for developing polymer-based hybrid nanoarchitectonics applied as targeted multifunctional theranostics for simultaneous imaging and therapy against glioblastoma while possibly reducing the systemic toxicity and side-effects of conventional anticancer chemotherapeutic agents.
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Affiliation(s)
- Alexandra A P Mansur
- Center of Nanoscience, Nanotechnology, and Innovation-CeNano(2)I, Federal University of Minas Gerais/UFMG, Belo Horizonte, MG, Brazil
| | - Mayara R B Paiva
- Pharmaceutical Research and Development, Ezequiel Dias Foundation, Belo Horizonte, MG, Brazil
| | - Oliver A L Cotta
- Pharmaceutical Research and Development, Ezequiel Dias Foundation, Belo Horizonte, MG, Brazil
| | - Luciana M Silva
- Pharmaceutical Research and Development, Ezequiel Dias Foundation, Belo Horizonte, MG, Brazil
| | - Isadora C Carvalho
- Center of Nanoscience, Nanotechnology, and Innovation-CeNano(2)I, Federal University of Minas Gerais/UFMG, Belo Horizonte, MG, Brazil
| | - Nádia S V Capanema
- Center of Nanoscience, Nanotechnology, and Innovation-CeNano(2)I, Federal University of Minas Gerais/UFMG, Belo Horizonte, MG, Brazil
| | - Sandhra M Carvalho
- Center of Nanoscience, Nanotechnology, and Innovation-CeNano(2)I, Federal University of Minas Gerais/UFMG, Belo Horizonte, MG, Brazil
| | - Érica A Costa
- Veterinary School, Universidade Federal de Minas Gerais-UFMG, Brazil
| | - Nelson R Martin
- Veterinary School, Universidade Federal de Minas Gerais-UFMG, Brazil
| | - Roselene Ecco
- Veterinary School, Universidade Federal de Minas Gerais-UFMG, Brazil
| | - Beatriz S Santos
- Veterinary School, Universidade Federal de Minas Gerais-UFMG, Brazil
| | - Silvia L Fialho
- Pharmaceutical Research and Development, Ezequiel Dias Foundation, Belo Horizonte, MG, Brazil.
| | - Zélia I P Lobato
- Veterinary School, Universidade Federal de Minas Gerais-UFMG, Brazil
| | - Herman S Mansur
- Center of Nanoscience, Nanotechnology, and Innovation-CeNano(2)I, Federal University of Minas Gerais/UFMG, Belo Horizonte, MG, Brazil.
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Grelich-Mucha M, Lipok M, Różycka M, Samoć M, Olesiak-Bańska J. One- and Two-Photon Excited Autofluorescence of Lysozyme Amyloids. J Phys Chem Lett 2022; 13:4673-4681. [PMID: 35605187 PMCID: PMC9169060 DOI: 10.1021/acs.jpclett.2c00570] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Autofluorescence properties of amyloid fibrils are of much interest but, to date, the attention has been given mostly to one-photon excited fluorescence (1PEF), while the two-photon excited fluorescence (2PEF) properties of amyloids are much less explored. We investigate 1PEF and 2PEF of hen egg-white lysozyme (HEWL) in the form of monomers and fibrils. HEWL monomers feature some autofluorescence, which is enhanced in the case of fibrils. Moreover, by varying NaCl content, we introduce changes to fibrils morphology and show how the increase of the salt concentration is linked with an increase of 1PEF and 2PEF intensities. Interestingly, we observe 2PEF emission red-shifted in comparison to 1PEF. We confirm the presence of different relaxation pathways upon one- or two-photon excitation by different lifetimes of the fluorescence decays. Finally, we correlate the changes in optical properties of HEWL fibrils and monomers with salt-mediated changes in their morphology and the secondary structure.
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Affiliation(s)
- Manuela Grelich-Mucha
- Advanced
Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wrocław, Poland
| | - Maciej Lipok
- Advanced
Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wrocław, Poland
| | - Mirosława Różycka
- Department
of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wrocław, Poland
| | - Marek Samoć
- Advanced
Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wrocław, Poland
| | - Joanna Olesiak-Bańska
- Advanced
Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wrocław, Poland
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42
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Teixeira MA, Antunes JC, Seabra CL, Fertuzinhos A, Tohidi SD, Reis S, Amorim MTP, Ferreira DP, Felgueiras HP. Antibacterial and hemostatic capacities of cellulose nanocrystalline-reinforced poly(vinyl alcohol) electrospun mats doped with Tiger 17 and pexiganan peptides for prospective wound healing applications. BIOMATERIALS ADVANCES 2022; 137:212830. [PMID: 35929263 DOI: 10.1016/j.bioadv.2022.212830] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/14/2022] [Accepted: 04/26/2022] [Indexed: 06/15/2023]
Abstract
Infection is a major issue in chronic wound care. Different dressings have been developed to prevent microbial propagation, but an effective, all-in-one (cytocompatible, antimicrobial and promoter of healing) solution is still to be uncovered. In this research, polyvinyl alcohol (PVA) nanofibrous mats reinforced with cellulose nanocrystal (CNC), at 10 and 20% v/v ratios, were produced by electrospinning, crosslinked with glutaraldehyde vapor and doped with specialized peptides. Crosslinking increased the mats' fiber diameters but maintained their bead-free morphology. Miscibility between polymers was confirmed by Fourier-transform infrared spectroscopy and thermal evaluations. Despite the incorporation of CNC having reduced the mats' mechanical performance, it improved the mats' surface energy and its structural stability over time. Pexiganan with an extra cysteine group was functionalized onto the mats via hydroxyl- polyethylene glycol 2-maleimide, while Tiger 17 was physisorbed to preserve its cyclic conformation. Antimicrobial assessments demonstrated the peptide-doped mat's effectiveness against Staphylococcus aureus and Pseudomonas aeruginosa; pexiganan contributed mostly for such outcome. Tiger 17 showed excellent capacity in accelerating clotting. Cytocompatibility evaluations attested to these mats' safety. C90/10 PVA/CNC mats were deemed the most effective from the tested group and, thus, a potentially effective option for chronic wound treatments.
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Affiliation(s)
- Marta A Teixeira
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Joana C Antunes
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Catarina L Seabra
- Associate Laboratory for Green Chemistry (LAQV), Network of Chemistry and Technology (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Aureliano Fertuzinhos
- Center for MicroElectroMechanics Systems (CMEMS), UMinho, Department of Mechanical Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Shafagh D Tohidi
- Digital Transformation Colab (DTX), Department of Mechanical Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Salette Reis
- Associate Laboratory for Green Chemistry (LAQV), Network of Chemistry and Technology (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - M Teresa P Amorim
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Diana P Ferreira
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| | - Helena P Felgueiras
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
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Jain M, Kumar S, Aswal VK, Al-Ghamdi AA, Kumar Kailasa S, Malek NI. Amino Acid Induced Self-Assembled Vesicles of Choline Oleate: pH responsive Nano-carriers for Targeted and Localized Delivery of Doxorubicin for Breast Cancer. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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44
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Sharma N, Kukreja D, Giri T, Kumar S, Shah RP. Synthetic pharmaceutical peptides characterization by chromatography principles and method development. J Sep Sci 2022; 45:2200-2216. [PMID: 35460196 DOI: 10.1002/jssc.202101034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/19/2022] [Accepted: 04/19/2022] [Indexed: 11/08/2022]
Abstract
As per United States Food and Drug Administration, any polymer/chain composed of 40 or fewer amino acids is called as a peptide, where more than 40 amino acids are considered as proteins. In many occasions there is a change in the source of manufacturing of the peptide active pharmaceutical ingredient, where one has to prove the sameness of that product with the existing formulation by considering several aspects like presence of impurities/degradation products, extent of aggregations etc. For the same, several chromatographic characterization techniques such as; Reverse phase high performance liquid chromatography-ultraviolet/high resolution mass spectrometry, supercritical fluid chromatography, size exclusion chromatography, Ion exchange chromatography etc are widely used in pharmaceutical industry. It is well known that the method development of peptide molecules is often challenging as many variables are to be kept in mind which can affect the separation, recovery and stability of molecule. The present review focuses on the basics of peptide degradation and method development by using various chromatographic techniques for characterization. It also covers a deep insight of method development parameters and variables to be considered which might directly or indirectly affect the chromatographic separation and recovery, and also provides a guide on selection of chromatographic parameters. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Nitish Sharma
- The National Institute of Pharmaceutical Education and Research-Ahmedabad (Ministry of Chemicals and Fertilizers Government of India), Opposite Air force Station, Palaj, Gandhinagar, Gujarat, 382355, INDIA
| | - Divya Kukreja
- The National Institute of Pharmaceutical Education and Research-Ahmedabad (Ministry of Chemicals and Fertilizers Government of India), Opposite Air force Station, Palaj, Gandhinagar, Gujarat, 382355, INDIA
| | - Tushar Giri
- The National Institute of Pharmaceutical Education and Research-Ahmedabad (Ministry of Chemicals and Fertilizers Government of India), Opposite Air force Station, Palaj, Gandhinagar, Gujarat, 382355, INDIA
| | - Sumit Kumar
- The National Institute of Pharmaceutical Education and Research-Ahmedabad (Ministry of Chemicals and Fertilizers Government of India), Opposite Air force Station, Palaj, Gandhinagar, Gujarat, 382355, INDIA
| | - Ravi P Shah
- The National Institute of Pharmaceutical Education and Research-Ahmedabad (Ministry of Chemicals and Fertilizers Government of India), Opposite Air force Station, Palaj, Gandhinagar, Gujarat, 382355, INDIA
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45
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Meng Y, Xue Q, Chen J, Li Y, Shao Z. Structure, stability, rheology, and texture properties of ε-polylysine-whey protein complexes. J Dairy Sci 2022; 105:3746-3757. [DOI: 10.3168/jds.2021-21219] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/22/2022] [Indexed: 01/13/2023]
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46
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Wilharm N, Bertmer M, Knolle W, Griebel J, Elsner C, Mayr SG. Biomimetic crosslinking of collagen gels by energetic electrons: The role of L-lysine. Acta Biomater 2022; 140:219-232. [PMID: 34551331 DOI: 10.1016/j.actbio.2021.09.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 11/19/2022]
Abstract
Energetic electrons have recently evolved as a powerful tool for crosslinking bio-derived hydrogels without the need for adding potentially hazardous reagents. Application of this approach allows for synthesis of biomimetic collagen-derived networks of highly tunable properties and functionalization. Yet, the underlying reaction kinetics are still not sufficiently established at this point. While hydroxyl radicals are generated by energetic electron-induced hydrolysis of water and play a key role in introducing covalent bonds between network fibers, a detailed mechanistic understanding would significantly increase applicability. We present a comprehensive analysis of central aspects of the reactivity between the hydroxyl radical (•OH) and collagen, elastin, glycine (Gly) and l-lysine (Lys). Pulse radiolysis (PR), solid state nuclear magnetic resonance (NMR), ultraviolet-visible absorption spectroscopy (UV/VIS) and electron spray ionization mass spectrometry (ESI-MS) shine light on distinct features of the crosslinking process. These highlight retained protein backbone integrity in collagen and elastin whilst Lys's ability to form several imine bonded Lys-Lys-species suggests striking similarities to crosslinking via lysyl oxidase catalysis in vivo. Thus, energetic electron based crosslinking opens the venue for customized hybrid gels of outstanding biomimicry and -compatibility. STATEMENT OF SIGNIFICANCE: Energetic electron beam treatment constitutes a highly attractive approach to establish chemical bonds between (bio) molecules. Although a convincing number of publications showed the versatility regarding crosslinking of bioderived hydrogels, insights into the underlying chemistry are still unestablished at this point. The present work unravels the mechanistics of energetic electron induced processes in collagen and elastin hydrogels as well as several abundant amino acids in aqueous solution. As key finding we demonstrate, that i) the connection between polymer chains is dominated by amino acid side chain interaction and ii) two single l-lysine molecules form an imine bond between the terminal amino group of one molecule and the delta carbon of the second molecule. We also consider the formation of H-bonds as a second crosslinking pathway. These findings open up for advanced, optionally spatially resolved biomaterials design.
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Affiliation(s)
- Nils Wilharm
- Leibniz-Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstr. 15, 04318 Leipzig, Germany; Division of Surface Physics, Department of Physics and Earth Sciences, University of Leipzig, Linnéstraße 5, 04103 Leipzig, Germany.
| | - Marko Bertmer
- Leipzig University, Felix-Bloch-Institute for Solid State Physics, Linnéstraße 5, 04103, Leipzig, Germany
| | - Wolfgang Knolle
- Leibniz-Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstr. 15, 04318 Leipzig, Germany
| | - Jan Griebel
- Leibniz-Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstr. 15, 04318 Leipzig, Germany
| | - Christian Elsner
- Leibniz-Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstr. 15, 04318 Leipzig, Germany
| | - Stefan G Mayr
- Leibniz-Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstr. 15, 04318 Leipzig, Germany; Division of Surface Physics, Department of Physics and Earth Sciences, University of Leipzig, Linnéstraße 5, 04103 Leipzig, Germany.
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Bui TKN, Mawatari K, Emoto T, Fukushima S, Shimohata T, Uebanso T, Akutagawa M, Kinouchi Y, Takahashi A. UV-LED irradiation reduces the infectivity of herpes simplex virus type 1 by targeting different viral components depending on the peak wavelength. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 228:112410. [PMID: 35193038 DOI: 10.1016/j.jphotobiol.2022.112410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 01/11/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Herpes simplex virus type 1 (HSV-1) is an enveloped virus that mainly infects humans. Given its high global prevalence, disinfection is critical for reducing the risk of infection. Ultraviolet-light-emitting diodes (UV-LEDs) are eco-friendly irradiating modules with different peak wavelengths, but the molecules degraded by UV-LED irradiation have not been clarified. To identify the target viral molecules of UV-LEDs, we exposed HSV-1 suspensions to UV-LED irradiation at wavelengths of 260-, 280-, 310-, and 365-nm and measured viral DNA, protein, and lipid damage and infectivity in host cells. All UV-LEDs substantially reduced by inhibiting host cell transcription, but 260- and 280-nm UV-LEDs had significantly stronger virucidal efficiency than 310- and 365-nm UV-LEDs. Meanwhile, 260- and 280-nm UV-LEDs induced the formation of viral DNA photoproducts and the degradation of viral proteins and some phosphoglycerolipid species. Unlike 260- and 280-nm UV-LEDs, 310- and 365-nm UV-LEDs decreased the viral protein levels, but they did not drastically change the levels of viral DNA photoproducts and lipophilic metabolites. These results suggest that UV-LEDs reduce the infectivity of HSV-1 by targeting different viral molecules based on the peak wavelength. These findings could facilitate the optimization of UV-LED irradiation for viral inactivation.
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Affiliation(s)
- Thi Kim Ngan Bui
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Kazuaki Mawatari
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan.
| | - Takahiro Emoto
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Shiho Fukushima
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Takaaki Shimohata
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan; Department of Marine Science and Technology, Fukui Prefectural University, 1-1 Gakuen-cho, Obama, Fukui 917-0003, Japan
| | - Takashi Uebanso
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Masatake Akutagawa
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Yohsuke Kinouchi
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Akira Takahashi
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
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Yousuf M, Shamsi A, Anjum F, Shafie A, Islam A, Haque QMR, Elasbali AM, Yadav DK, Hassan MI. Effect of pH on the structure and function of cyclin-dependent kinase 6. PLoS One 2022; 17:e0263693. [PMID: 35148332 PMCID: PMC8836317 DOI: 10.1371/journal.pone.0263693] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 01/25/2022] [Indexed: 12/15/2022] Open
Abstract
Cyclin-dependent kinase 6 (CDK6) is an important protein kinase that regulates cell growth, development, cell metabolism, inflammation, and apoptosis. Its overexpression is associated with reprogramming glucose metabolism through alternative pathways and apoptosis, which ultimately plays a significant role in cancer development. In the present study, we have investigated the structural and conformational changes in CDK6 at varying pH employing a multi-spectroscopic approach. Circular dichroism (CD) spectroscopy revealed at extremely acidic conditions (pH 2.0–4.0), the secondary structure of CDK6 got significantly disrupted, leading to aggregates formation. These aggregates were further characterized by employing Thioflavin T (ThT) fluorescence. No significant secondary structural changes were observed over the alkaline pH range (pH 7.0–11.0). Further, fluorescence and UV spectroscopy revealed that the tertiary structure of CDK6 was disrupted under extremely acidic conditions, with slight alteration occurring in mild acidic conditions. The tertiary structure remains intact over the entire alkaline range. Additionally, enzyme assay provided an insight into the functional aspect of CDK at varying pH; CDK6 activity was optimal in the pH range of 7.0–8.0. This study will provide a platform that provides newer insights into the pH-dependent dynamics and functional behavior of CDK6 in different CDK6 directed diseased conditions, viz. different types of cancers where changes in pH contribute to cancer development.
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Affiliation(s)
- Mohd Yousuf
- Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | - Anas Shamsi
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Farah Anjum
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Alaa Shafie
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | | | - Abdelbaset Mohamed Elasbali
- Clinical Laboratory Science, College of Applied Medical Sciences-Qurayyat, Jouf University, Sakaka, Saudi Arabia
| | - Dharmendra Kumar Yadav
- College of Pharmacy, Gachon University of Medicine and Science, Incheon City, South Korea
- * E-mail: (DKY); (MIH)
| | - Md. Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
- * E-mail: (DKY); (MIH)
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Schuster S, Su Yien Ting A. Decolourisation of triphenylmethane dyes by biogenically synthesised iron nanoparticles from fungal extract. Mycology 2022; 13:56-67. [PMID: 35186413 PMCID: PMC8856070 DOI: 10.1080/21501203.2021.1948928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
In this study, the extract from endophytic Fusarium proliferatum was used to synthesise iron nanoparticles (Fe-NPs). The properties of the biogenically synthesised Fe-NPs were then characterised by field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and Fourier transform infrared spectroscopy (FTIR). The efficacy of the synthesised Fe-NPs in decolourizing triphenylmethane dyes was evaluated. Results revealed that fungal extract from F. proliferatum was successfully used to synthesise Fe-NPs. The Fe-NPs produced were 20-50 nm in size, and consist of substantial elemental Fe content (14.83%). The FTIR spectra revealed the presence of amino acids and proteins on the surface of the Fe-NPs, confirming the biogenic synthesis of the Fe-NPs. When tested for decolourisation, the Fe-NPs were most effective in decolourising Methyl Violet (28.9%), followed by Crystal Violet (23.8%) and Malachite Green (18.3%). This study is the first few to report the biogenic synthesis of Fe-NPs using extracts from an endophytic Fusarium species and their corresponding dye decolourisation activities.
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Nascimento ED, Fonseca WT, de Oliveira TR, de Correia CRSTB, Faça VM, de Morais BP, Silvestrini VC, Pott-Junior H, Teixeira FR, Faria RC. COVID-19 diagnosis by SARS-CoV-2 Spike protein detection in saliva using an ultrasensitive magneto-assay based on disposable electrochemical sensor. SENSORS AND ACTUATORS. B, CHEMICAL 2022; 353:131128. [PMID: 34866796 DOI: 10.1016/j.snb.2021.131148] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 05/27/2023]
Abstract
The outbreak of the COVID-19 pandemic, caused by Severe Acute Respiratory Syndrome of Coronavirus 2 (SARS-CoV-2), has fueled the search for diagnostic tests aiming at the control and reduction of the viral transmission. The main technique used for diagnosing the Coronavirus disease (COVID-19) is the reverse transcription-polymerase chain reaction (RT-PCR) technique. However, considering the high number of cases and the underlying limitations of the RT-PCR technique, especially with regard to accessibility and cost of the test, one does not need to overemphasize the need to develop new and less expensive testing techniques that can aid the early diagnosis of the disease. With that in mind, we developed an ultrasensitive magneto-assay using magnetic beads and gold nanoparticles conjugated to human angiotensin-converting enzyme 2 (ACE2) peptide (Gln24-Gln42) for the capturing and detection of SARS-CoV-2 Spike protein in human saliva. The technique applied involved the use of a disposable electrochemical device containing eight screen-printed carbon electrodes which allow the simultaneous analysis of eight samples. The magneto-assay exhibited an ultralow limit of detection of 0.35 ag mL-1 for the detection of SARS-CoV-2 Spike protein in saliva. The magneto-assay was tested in saliva samples from healthy and SARS-CoV-2-infected individuals. In terms of efficiency, the proposed technique - which presented a sensitivity of 100.0% and specificity of 93.7% for SARS-CoV-2 Spike protein-exhibited great similarity with the RT-PCR technique. The results obtained point to the application potential of this simple, low-cost magneto-assay for saliva-based point-of-care COVID-19 diagnosis.
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Affiliation(s)
- Evair D Nascimento
- Department of Chemistry, Federal University of São Carlos-UFSCar, Rod. Washington Luís km 235, São Carlos, SP, 13565-905, Brazil
| | - Wilson T Fonseca
- Department of Chemistry, Federal University of São Carlos-UFSCar, Rod. Washington Luís km 235, São Carlos, SP, 13565-905, Brazil
| | - Tássia R de Oliveira
- Department of Chemistry, Federal University of São Carlos-UFSCar, Rod. Washington Luís km 235, São Carlos, SP, 13565-905, Brazil
| | - Camila R S T B de Correia
- Department of Genetics and Evolution, Federal University of Sao Carlos-UFSCar, São Carlos, SP, 13565-905, Brazil
| | - Vitor M Faça
- Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo-USP, Brazil
| | - Beatriz P de Morais
- Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo-USP, Brazil
| | - Virginia C Silvestrini
- Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo-USP, Brazil
| | - Henrique Pott-Junior
- Department of Medicine, Federal University of São Carlos-UFSCar, São Carlos, SP, 13565-905, Brazil
| | - Felipe R Teixeira
- Department of Genetics and Evolution, Federal University of Sao Carlos-UFSCar, São Carlos, SP, 13565-905, Brazil
| | - Ronaldo C Faria
- Department of Chemistry, Federal University of São Carlos-UFSCar, Rod. Washington Luís km 235, São Carlos, SP, 13565-905, Brazil
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