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Belashov AV, Zhikhoreva AA, Gorbunova IA, Sasin ME, Semenova IV, Vasyutinskii OS. Photophysical, rotational and translational properties of Radachlorin photosensitizer upon binding to serum albumins. Biochim Biophys Acta Gen Subj 2024; 1868:130546. [PMID: 38141885 DOI: 10.1016/j.bbagen.2023.130546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/12/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
INTRODUCTION Although photophysical properties of Radachlorin photosensitizer (PS) were extensively studied in solutions and cells, no data is available on variations of its characteristics upon binding to serum albumins, which are major transporters in blood and nutrients in cell culture media. OBJECTIVES The primary objective of this study was to analyze changes in photophysical properties of Radachlorin molecules upon their binding to human and bovine serum albumins at different microenvironment properties. METHODS Experiments were performed using time-resolved fluorescence spectroscopy and fluorescence recovery after photobleaching. Variations in fluorescence spectra and lifetime, fluorescence anisotropy, rotational and translational diffusion of PS molecules upon binding to albumins were studied in normal, basic and acidic conditions and at different concentrations of albumin and PS molecules. RESULTS Radachlorin molecules effectively bind to both types of serum albumins, which causes changes in photophysical properties of the PS. A minor red shift of the fluorescence spectrum, an increase in fluorescence lifetime and anisotropy and substantial decrease of translational and rotational mobility of PS molecules were observed upon their binding to albumins. The analysis of rotational diffusion time provided robust evaluation of the bound fraction of PS molecules. Both the highly acidic microenvironment and increase in alcohol concentration above 40% resulted in detachment of PS molecules from albumins. Photophysical properties of Radachlorin in complexes with BSA and HSA were found to be slightly different. CONCLUSIONS Binding of Radachlorin photosensitizer to either BSA or HSA affects significantly its photophysical properties, which may also vary with microenvironment acidity and alcohol concentration.
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Affiliation(s)
- A V Belashov
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - A A Zhikhoreva
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - I A Gorbunova
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - M E Sasin
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - I V Semenova
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia.
| | - O S Vasyutinskii
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg 194021, Russia
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González-Santiago B, Vicente-Escobar JO, de la Luz-Tlapaya V, García-Gutiérrez P, García-Sánchez MÁ. Porphyrins Embedded in Translucent Polymeric Substrates: Fluorescence Preservation and Molecular Docking Studies. J Fluoresc 2023:10.1007/s10895-023-03396-9. [PMID: 37597136 DOI: 10.1007/s10895-023-03396-9] [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: 07/16/2023] [Accepted: 08/10/2023] [Indexed: 08/21/2023]
Abstract
This research describes the functionalization of polymer-matrix-trapping porphyrins, considering that the transcendental properties of meso-substituted porphyrins, such as optical and chemical stability, combined with the strength of the polymers, can produce photoactive advanced polymeric networks. Polystyrene (PS) and O,O´-bis-(2-aminopropyl)-polyethyleneglycol-300 (2NH2peg300, APEG), or their combination, were used to confine the meso-substituted porphyrin species 5,10,15,20-tetrakis(4'-carboxy-1,1'-biphenyl-4-yl)porphyrin and 5,10,15,20-tetrakis((pyridin-4-yl)phenyl)porphyrin. The samples were characterized by Fourier-transform infrared (FTIR), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) and fluorescence spectroscopies. The absorption and emission properties of the materials were compared to those of their respective porphyrin solutions. The fluorescence was preserved in the obtained composite through a mixture of polymers, PS, and APEG, yielding translucent polymeric networks. Moreover, analysis of individual polymeric assemblies by molecular docking was performed to support the understanding of the experimental findings. This analysis corroborates that the stronger the estimated binding energies, the stronger the interactions that occur between porphyrin and the polymer via non-polar covalent bonds.
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Affiliation(s)
- Berenice González-Santiago
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad Legaria, Calzada Legaria 694, Alcaldía Miguel Hidalgo, Ciudad de México, 11500, México
| | - Jonathan Osiris Vicente-Escobar
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Verónica de la Luz-Tlapaya
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Ponciano García-Gutiérrez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Miguel Ángel García-Sánchez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México.
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Subhash, Chaudhary A, Mamta, Jyoti. Synthesis, structural characterization, thermal analysis, DFT, biocidal evaluation and molecular docking studies of amide-based Co(II) complexes. CHEMICKE ZVESTI 2023; 77:1-20. [PMID: 37362794 PMCID: PMC10154188 DOI: 10.1007/s11696-023-02843-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/21/2023] [Indexed: 06/28/2023]
Abstract
Abstract Many distinct amino acid and aromatic amine-derived transition metal complexes are used as physiologically active compounds. A few Cobalt (II) complexes have been synthesized by reacting cobalt (II) chloride with 1, 8-diaminonapthalene-based tetraamide macrocyclic ligands in an ethanolic media. These synthesized ligands (TAML1-3) and associated Co(II) complexes were fully characterized with various spectroscopic techniques, such as IR, NMR, CHN analysis, EPR, molar conductance, and magnetic susceptibility measurements, TGA, UV-visible spectra, powder X-ray diffraction and DFT analysis. The IR spectra reveal interactions between the core metal atom and ligands through N of 1, 8-diaminonapthalene. The distorted octahedral geometry of synthesized Co(II) macrocyclic complexes were confirmed by ESR, UV-Vis and DFT studies. The synthesized ligands (TAML1-TAML3) and their Co(II) complexes were tested for antimicrobial activity against A. niger, C. albicans, and F. oxysporum in addition to bacteria like S. aureus, B. subtilis, and Gram-negative bacteria like E. coli. The ligand TAML1 and complex [Co(TAML1)Cl2] showed an excellent antibacterial activity. The minimum inhibitory concentration of TAML1 and [Co(TAML1)Cl2] against S. aureus were found to be 7 mm and 10 mm zone of inhibition at 500 ppm, respectively, compared to drug ampicillin (3 mm). Additionally, each molecule exhibited notable antioxidant activity. The biological significance of the synthesized compounds was then evaluated by molecular docking experiments with the active site of the receptor protein such as Sars-Cov-2, C. Albicans, X. campestris and E. coli. The molecular docking assisted data strongly correlated to the experimental approach of antimicrobial activity. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11696-023-02843-y.
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Affiliation(s)
- Subhash
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119 India
| | - Ashu Chaudhary
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119 India
| | - Mamta
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119 India
| | - Jyoti
- Department of Applied Science, UIET, Kurukshetra University, Kurukshetra, Haryana 136119 India
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Miao W, Jia D, Rui Y, Liang W, Chen Y, Liu H, Yi Z. Interaction Mechanisms of the Binding of Polychlorinated Biphenyls to Thyroid Hormone Transporters Revealed based on Quantum Chemistry and Spectroscopy. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Gao Y, Bian C, Li N, Yao K, Xiao L, Yang Z, Guan T. Exploring the binding mechanism and adverse toxic effects of chiral phenothrin to human serum albumin: Based on multi-spectroscopy, biochemical and computational approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 282:121659. [PMID: 35930945 DOI: 10.1016/j.saa.2022.121659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
To understand the binding mechanism of a mixture of chiral phenothrin with human serum albumin (HSA), we used multi-spectroscopy, including steady-state fluorescence spectroscopic titration, three-dimensional fluorescence spectroscopy, circular dichroism, and FTIR spectra to explore the precise interactions between the complex. Based on the modified Stern-Volmer equation, the binding constant (Ka) was calculated under three temperatures, which revealed that phenothrin interacts with HSA through a static quenching mechanism. The thermodynamic parameters including enthalpy change (ΔH) and entropy change (ΔS) were determined by fitting the experimental data with van't Hoff equation, which indicates that electrostatic force and hydrogen bonds dominate the interplay in the phenothrin-HSA complex. Circular dichroism and FTIR showed the addition of phenothrin changed the secondary structure of proteins, in which the α-helicity decreased from 52.37% in free HSA to 50.02%. The esterase-like activity was reduced with the increase of phenothrin concentration, which may be attributed to the perturbated senior structure of HSA. Competitive displacement experiments confirmed that phenothrin inserted into the subdomain IIA (site I) of HSA. Several computational approaches such as molecular docking, frontier molecular orbital analysis, and electrostatic potential analysis were utilized to probe into the binding mode of the phenothrin-HSA complex. The binding behaviors of the chiral phenothrin mixture differed during the complexation. In conclusion, both the experimental and theoretical investigations provide useful information for better understanding and reducing the potential deleterious effects of the chiral phenothrin mixture on human long-term physio-pathological status.
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Affiliation(s)
- Ya Gao
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Canfeng Bian
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Ning Li
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Kun Yao
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Lixia Xiao
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Zhenquan Yang
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China.
| | - Tianzhu Guan
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China.
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GUAN TZ, LI N, GAO Y, GAO YJ, YANG M, LI Q, XIAO LX. Mechanism evaluation of the interactions between bisphenol AP and bovine serum albumin based on multi-spectroscopy, wavefunction analysis, and molecular docking. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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