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Ihde MH, Steelman AM, Bonizzoni M. Fluorescent Probes for the Supramolecular Interactions responsible for Binding of Polycyclic Aromatic Hydrocarbons to Hyperbranched Polyelectrolytes in Aqueous Media. Isr J Chem 2021. [DOI: 10.1002/ijch.202000097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Michael H. Ihde
- Department of Chemistry and Biochemistry The University of Alabama P.O. Box 870336 Tuscaloosa, AL 35487 United States
| | - Ashley M. Steelman
- Department of Chemistry and Biochemistry The University of Alabama P.O. Box 870336 Tuscaloosa, AL 35487 United States
- Department of Chemistry University of Kentucky Lexington KY 40506 United States
| | - Marco Bonizzoni
- Department of Chemistry and Biochemistry The University of Alabama P.O. Box 870336 Tuscaloosa, AL 35487 United States
- The Alabama Water Institute P.O. Box 870206 Tuscaloosa, AL 35487 United States
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Wang X, Zhang S, Zhao H, Wang Q, Zhang Y, Xu H, Xia X, Han S. Spectroscopic Investigation into the Binding of Ferulic Acid with Sodium Deoxycholate: Hydrophobic Force Versus Hydrogen Bonding. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1420-1428. [PMID: 33475381 DOI: 10.1021/acs.langmuir.0c02880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The binding of ferulic acid (FA) with sodium deoxycholate (NaDC) has been investigated using fluorescence and absorption measurements. The fluorescence probe technique of pyrene reveals that the presence of FA favors the micellization of NaDC, leading to the decreased critical micelle concentrations for the formation of NaDC micelles. As NaDC molecules change gradually from monomers via primary micelles into secondary micelles, the intensities of absorption and fluorescence spectra of FA increase at low NaDC concentrations, but decrease suddenly at intermediate NaDC concentrations, and finally increase again at high NaDC concentrations. These results corroborated well with FA fluorescence lifetime data suggesting that the aryl ring of FA hydrophobically binds to the convex surface of NaDC monomers, whereas the hydrogen bonding between FA and NaDC is significantly involved in NaDC primary micelles, which is gradually overcome by the hydrophobic interaction between FA and NaDC secondary micelles. The absorption and fluorescence spectra as well as the binding constant value of FA indicate the strong binding of FA in the large hydrophobic core of NaDC secondary micelles. At low FA concentrations, the measurement of FA anisotropy suggests that FA can increase the packing order of hydrophobic surfaces in NaDC secondary micelles, whereas the high amount of FA can greatly disrupt the packing structure of NaDC secondary micelles which is ascribed to the formation of FA dimers. The spectroscopic experiments outlined here present the binding events of FA with NaDC monomers and primary and secondary micelles, which are significantly related with the hydrophobic force and hydrogen bonding as well as the unique structural characteristics of bile salt.
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Affiliation(s)
- Xiaoyong Wang
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shan Zhang
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Huiling Zhao
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qian Wang
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuke Zhang
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hexiang Xu
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xinyu Xia
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Simin Han
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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Mukherjee S, Gupta S, Ganorkar K, Kumar A, Ghosh SK. Entrapment in micellar assemblies switches the excimer population of potential therapeutic luminophore azapodophyllotoxin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117723. [PMID: 31748162 DOI: 10.1016/j.saa.2019.117723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 09/19/2019] [Accepted: 10/27/2019] [Indexed: 06/10/2023]
Abstract
Azapodophyllotoxin is a new class of anti-tumor agent with brilliant therapeutic activity and understanding its physicochemical nature in bio-mimetic microenvironments may provide substantial importance in context of its intercellular localization, efficacy as well as delivery. The present work epitomizes environment-sensitive fluorescence modulation of a prodigy, 4-(2-Hydroxyethyl)-10-phenyl-3,4,6,7,8,10- hexahydro-1H-cyclopenta[g]furo[3,4-b]quinoline-1-one (HPFQ) from the class of anti-cancer agent Azapodophyllotoxin, in differently charged model bio-mimetic micellar microenvironment of cationic CTAB, anionic SDS and neutral Triton X-100 using UV-visible absorption, steady state fluorescence, time-resolved fluorescence and fluorescence anisotropy studies. As a distinct phenomenon, anticancer HPFQ exhibits prolific fluorescence in solvents of varying polarity, originating from a mixed contribution of locally excited, charge transfer and excimer emission. A dramatic modulation in the photophysics of HPFQ has been observed in two types of surfactant consortiums: pre-micellar and post-micellar at physiological and anoxic pH. On photo-excitation, anti-cancer HPFQ exists in monomer-excimer equilibrium with varying ratios in different polarity regions. The marked enhancement in fluorescence intensity of HPFQ in post-micellar region of the surfactant under study probably arises due to regeneration of the monomer from its excimer. This reoccurrence reduces the possibility of Förster resonance energy transfer (FRET) from monomer to excimer, which essentially increases the desired emission intensity. Localization of HPFQ in micellar systems highly depends on polarity gradient inside the micelle, electrostatic, hydrophobic and intermolecular hydrogen bonding interactions. Further corroboration with the polarity sensitive experiments in dioxane-water mixture indicates towards spatial localization of the probe molecule in the stern layer of cationic CTAB, sheer surface of neutral TX100 and outer Gouy-Chapman layer in anionic SDS micelles. A molecular binary logic gate correlates the dominance of micellization over the polarity factor, which enhances the fluorescence response of HPFQ. The enhancement of the emissive potential of anti-cancer HPFQ in biomimetic environments by switching its excimer population may have an immense importance to achieve the status of a dual therapeutic and imaging agent altogether in progressive biomedical research.
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Affiliation(s)
- Soham Mukherjee
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India
| | - Smruti Gupta
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India
| | - Kapil Ganorkar
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India
| | - Ajay Kumar
- School of Science, Technology and Environment, Universidad Ana G. Mendez-Cupey Campus, San Juan, PR, USA, 00926
| | - Sujit Kumar Ghosh
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India.
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Paul BK, Ghosh N, Mukherjee S. Association and sequestered dissociation of an anticancer drug from liposome membrane: Role of hydrophobic hydration. Colloids Surf B Biointerfaces 2018; 170:36-44. [PMID: 29864652 DOI: 10.1016/j.colsurfb.2018.05.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/23/2018] [Accepted: 05/29/2018] [Indexed: 01/31/2023]
Abstract
Herein, the interaction of a potent anticancer drug (Sanguinarine, SG) with dimyristoyl-l-α-phosphatidylglycerol (DMPG) liposome membrane has been investigated at physiological pH. The spectroscopic fluorescence decay results demonstrate a modification of the photophysics of SG within DMPG-encapsulated state leading to preferential stabilization of the iminium ion over the alkanolamine form. This suggests a key role of electrostatic force underlying the interaction. The complex dependence of the thermodynamic parameters on temperature yields a unique finding of a positive heat capacity change (ΔCp) indicating the signature of hydrophobic hydration. The study also demonstrates the application of β-cyclodextrin (βCD) as a prospective host system resulting in release of the DMPG-bound drug. A calorimetric exploration of the DMPG-βCD interaction reveals an intrinsically complex thermodynamics of the process leading to ΔCp > 0 and thus marking the instrumental role of hydrophobic hydration which follows that the DMPG-βCD interaction is accompanied with burial of polar molecular surfaces. A systematic investigation of the diffusion of the drug within various microheterogeneous environments by Fluorescence Correlation Spectroscopy (FCS) categorically reinforces our arguments.
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Affiliation(s)
- Bijan K Paul
- Department of Chemistry, Mahadevananda Mahavidyalaya, Barrackpore, Kolkata 700120, West Bengal, India
| | - Narayani Ghosh
- Department of General Science and Humanities, Modern Institute of Engineering and Technology, Bandel, Kolkata 712123, West Bengal, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India.
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Sett R, Guchhait N. Differential Perturbation of the Protrotropic Equilibrium of a Biological Photosensitizer within Bile Salt Aggregates of Varying Hydrophobicity: A Fluorimetric Investigation. Photochem Photobiol 2017; 94:328-337. [PMID: 29164617 DOI: 10.1111/php.12863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 10/27/2017] [Indexed: 12/01/2022]
Abstract
The present work reveals the binding interactions of a credible cancer cell photosensitizer, harmane (HM), with some selected bile salt aggregates of dissimilar hydrophobicity viz. sodium deoxycholate (NaDC), sodium cholate (NaC) and sodium taurocholate (NaTC). The explicit variation of the prototropic equilibrium of the photosensitizer both in the ground and excited state has been utilized to scrutinize the interaction phenomena. Differential modulation in the prototropic equilibrium of HM in the aforesaid aggregates has been explained on the basis of the structural dissimilarities of the bile salt monomers. The contrived hydrophobic surroundings provided by the aggregates have been reflected on the spectroscopic results, especially in the time-resolved fluorescence and the rotational dynamical behavior of the molecule of interest. Slow solvent reorientation time with regard to the lifetime of HM proliferated by the red-edge effect in two specific bile salts namely NaC and NaTC, whereas its absence in NaDC aggregates has also been elucidated on the basis of accessibility of the solvent molecules within the aggregates.
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Affiliation(s)
- Riya Sett
- Department of Chemistry, University of Calcutta, Calcutta, India
| | - Nikhil Guchhait
- Department of Chemistry, University of Calcutta, Calcutta, India
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Sen S, Paul BK, Guchhait N. Differential interaction behaviors of an alkaloid drug berberine with various bile salts. J Colloid Interface Sci 2017; 505:266-277. [DOI: 10.1016/j.jcis.2017.05.081] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 01/17/2023]
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Ganguly A, Ghosh S, Guchhait N. Inclusion of an Anthracene-based Fluorophore within Molecular Containers: A Comparative Study of the Cucurbituril and Cyclodextrin Host Families. J Phys Chem B 2016; 120:4421-30. [PMID: 27119387 DOI: 10.1021/acs.jpcb.6b04178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, the binding interaction of a promising chloride channel blocker, 9-methyl anthroate (9-MA), with two different classes of molecular containers, β-cyclodextrins (β-CD and methyl-β-CD) and cucurbit[7]uril, having comparable cavity dimensions, has been thoroughly demonstrated via inspection of the modulation of the excited-state properties of the emissive molecule. Spectral data suggest that CB7 encapsulates the probe more efficiently in a 1:2 fashion, whereas the efficacies of β-CDs are relatively less and the corresponding stoichiometry is 1:1. Interestingly, despite being thermodynamically much more favorable than the probe-β-CD complexation equilibria, the fraction of probe-CB7 complex formed is appreciably smaller with respect to that of probe-β-CD complexes. This apparent inconsistency has been addressed via the proposition that since the formation of a 1:2 complex is entropically disadvantageous, it is anticipated that the activation barrier of the corresponding reaction is reasonably high, and thus only a small fraction of the reactants are able to surpass the energy barrier to form the products. This proposition has been thoroughly corroborated by fluorescence lifetime measurements at different temperatures.
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Affiliation(s)
- Aniruddha Ganguly
- Department of Chemistry, University of Calcutta , 92 Acharya Prafulla Chandra Road, Calcutta 700009, India
| | - Soumen Ghosh
- Department of Chemistry, University of Calcutta , 92 Acharya Prafulla Chandra Road, Calcutta 700009, India
| | - Nikhil Guchhait
- Department of Chemistry, University of Calcutta , 92 Acharya Prafulla Chandra Road, Calcutta 700009, India
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