1
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Jana R, Ahmed SA, Seth D. Interaction between Cucurbit[7]uril and Bile Salts: An Isothermal Titration Calorimetry Study. ChemistrySelect 2022. [DOI: 10.1002/slct.202103800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rabindranath Jana
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
| | - Sayeed Ashique Ahmed
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
| | - Debabrata Seth
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
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2
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Sahu AK, Mishra AK. Photophysical Behavior of Plant Flavonols Galangin, Kaempferol, Quercetin, and Myricetin in Homogeneous Media and the DMPC Model Membrane: Unveiling the Influence of the B-Ring Hydroxylation of Flavonols. J Phys Chem B 2022; 126:2863-2875. [PMID: 35404618 DOI: 10.1021/acs.jpcb.2c00929] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Flavonols have been studied extensively because of their interesting biological activities and excited-state intramolecular proton transfer (ESIPT) behavior. Galangin, kaempferol, quercetin, and myricetin are structurally related flavonols that differ only in the number of B-ring hydroxyl substituents. In this work, we have carried out a detailed study on the photophysical behavior of these structurally related flavonols in various solvents and a 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) small unilamellar vesicles (SUVs) model membrane. We observed that these flavonols exist in different forms in the ground and excited states depending on the nature of the solvent. The weak intrinsic fluorescence of these flavonols gets enhanced in hydrogen-bond-accepting and alcoholic solvents. The phototautomer fluorescence intensity of these flavonols increases significantly in the DMPC membrane compared to water, suggesting ESIPT activation via binding interaction between flavonols and the membrane. According to our findings, both the number of B-ring hydroxy groups and membrane fluidity affect the flavonol binding with the membrane. The steady-state fluorescence intensity, steady-state anisotropy, fluorescence lifetime, and fluorescence anisotropy decay of flavonols were sensitive towards the temperature-induced DMPC membrane phase change. A quenching study has been performed to investigate the location and distribution of flavonols in the DMPC SUVs. Moreover, the antioxidant potential of flavonols in DMPC SUVs has been examined using the DPPH scavenging method. Our results reveal that the B-ring hydroxy groups significantly affect the photophysics, binding affinity, location, distribution, and DPPH scavenging activity of polyhydroxy-flavonols in the DMPC SUVs.
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Affiliation(s)
- Anand Kumar Sahu
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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3
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Singh A, Pati AK, Mishra AK. Photophysics and photoreactivity of cross-conjugated enediynyl aggregates: Applications to multi-parametric sensing of microheterogeneity and reversible fluorescence switching. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2019.110579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Das K, Sappati S, Hazra P. Peculiar hydrogen bonding behaviour of water molecules inside the aqueous nanochannels of lyotropic liquid crystals. Phys Chem Chem Phys 2020; 22:6210-6221. [DOI: 10.1039/c9cp06405b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The hydrogen bonding abilities of the LLC water molecules and their effects on intramolecular hydrogen bonds of the target probe molecules.
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Affiliation(s)
- Konoya Das
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Pune
- India
| | - Subrahmanyam Sappati
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Pune
- India
| | - Partha Hazra
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Pune
- India
- Centre for Energy Science
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5
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Debnath S, Mishra J. Understanding the intrinsic fluorescence of piperine in microheterogeneous media: partitioning and loading studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj00770f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Piperine, an ingredient of black pepper, is widely used in pharmaceutical applications.
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Affiliation(s)
- Sanchari Debnath
- Department of Chemistry Indian Institute of Technology Madras
- Chennai 600036
- India
| | - Jhili Mishra
- Department of Chemistry Indian Institute of Technology Madras
- Chennai 600036
- India
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6
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Mishra J, Mishra AK. Estimation of Micropolarity and Microviscosity of Pluronic F127–Surfactant Mixed Systems Using Fisetin as a Fluorescent Molecular Probe. ChemistrySelect 2019. [DOI: 10.1002/slct.201803924] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jhili Mishra
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036
| | - Ashok Kumar Mishra
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036
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7
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Bhuiya S, Chowdhury S, Haque L, Das S. Spectroscopic, photophysical and theoretical insight into the chelation properties of fisetin with copper (II) in aqueous buffered solutions for calf thymus DNA binding. Int J Biol Macromol 2018; 120:1156-1169. [DOI: 10.1016/j.ijbiomac.2018.08.162] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/21/2018] [Accepted: 08/27/2018] [Indexed: 01/29/2023]
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8
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Talele P, Sahu S, Mishra AK. Physicochemical characterization of solid lipid nanoparticles comprised of glycerol monostearate and bile salts. Colloids Surf B Biointerfaces 2018; 172:517-525. [PMID: 30212689 DOI: 10.1016/j.colsurfb.2018.08.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/22/2018] [Accepted: 08/30/2018] [Indexed: 11/15/2022]
Abstract
Successful applications of solid lipid nanoparticles (SLNs) rely on their physicochemical properties which are mainly governed by their comprising materials (e.g., lipids, emulsifiers) and preparation methods. We have prepared biocompatible solid lipid nanoparticles with glycerol monostearate as lipid and varying combinations of bile salts sodium deoxycholate and sodium cholate (bile salts to lipid ratio 8% w/w) as emulsifiers. The detailed characterization of solid lipid nanoparticles was performed using a combination of light scattering, microscopic, calorimetric, and spectroscopic techniques. It was seen that different compositions of bile salts yield nanoparticles with different sizes. The use of only sodium deoxycholate (8% w/w) produces nanoparticles with average sizes ∼487 nm. The average particle size increases with increasing cholate fraction. A higher average particle size around ∼652 nm is obtained with 8% (w/w) sodium cholate. All the SLNs show good physical stability at room temperature and do not show polymorphic transformation during the storage. In order to study the microenvironments, solid lipid nanoparticles are loaded with an external fluorescent-probe fisetin (probe to lipid ratio 1% w/w). Photophysical properties of fisetin loaded SLNs indicate the micro-heterogenicity inside the nanoparticles.
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Affiliation(s)
- Paurnima Talele
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Saugata Sahu
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
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9
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Mishra J, Swain J, Mishra AK. Probing the temperature-dependent changes of the interfacial hydration and viscosity of Tween20 : cholesterol (1 : 1) niosome membrane using fisetin as a fluorescent molecular probe. Phys Chem Chem Phys 2018; 20:13279-13289. [PMID: 29610803 DOI: 10.1039/c8cp00492g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed photophysical study of fisetin in a Tween20 : cholesterol (1 : 1) niosome membrane has been carried out. Fisetin is found to partition well into the Tween20 : cholesterol (1 : 1) niosome membrane at low temperature (Kp = 2.7 × 104 M-1 at 10 °C). Cetylpyridinium chloride quenching study confirms the location of fisetin molecules in the interfacial domain of Tween20 : cholesterol (1 : 1) niosome membrane. The emission from the prototropic forms of fisetin (neutral form, excited state anion, ground state anion and phototautomer form) is found to sensitively reflect the local heterogeneities in Tween20 : cholesterol (1 : 1) niosome membrane. The shift in anionic emission maximum with variation in temperature shows the sensitivity of fisetin towards water accessibility at the interfacial domain of Tween20 : cholesterol (1 : 1) niosome membrane. Zeta potential value confirms that there is no role of surface charge in the multiple prototropism of fisetin in Tween20 : cholesterol (1 : 1) niosome membrane. The microviscosity changes with temperature, as reflected in fluorescence anisotropy values of fisetin phototautomeric species FT*, give information about the temperature-induced changes in the motional resistance offered by the interfacial domain of the niosomal membrane to small molecules. A temperature-dependent fluorescence lifetime study confirms the distribution of FT* in the two different sites of niosomal interfacial domain, i.e. water-deficient inner site and water-accessible outer site. This heterogeneity in distribution of FT* is further confirmed through time-resolved fluorescence anisotropy decay resulting in two different rotational time constants (faster component of ∼1.04 ns originates from water-accessible outer site and slower component of ∼16.50 ns originates from water-deficient inner site). The interfacial location of fisetin in Tween20 : cholesterol (1 : 1) niosome membrane has an important implication with regards to antioxidant activity as confirmed from a DPPH radical scavenging study.
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Affiliation(s)
- Jhili Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Jitendriya Swain
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
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10
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Jia X, Li C, Li D, Liu Y. TDDFT study on excited state intramolecular proton transfer mechanism in 2-amino-3-(2'-benzazolyl)-quinolines. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 192:168-173. [PMID: 29132053 DOI: 10.1016/j.saa.2017.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 10/18/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
The intramolecular proton transfer reaction of the 2-amino-3-(2'-benzoxazolyl)-quinoline (ABO) and 2-amino-3-(2'-benzothiazolyl)-quinoline (ABT) molecules in both S0 and S1 states at B3LYP/6-311++G(d,p) level in ethanol solvent have been studied to reveal the deactivation mechanism of the tautomers of the two molecules from the S1 state to the S0 state. The results show that the tautomers of ABO and ABT molecules may return to the S0 state by emitting fluorescence. In addition, the bond lengths, angles and infrared spectra are analyzed to confirm the hydrogen bonds strengthened upon photoexcitation, which can facilitate the proton transfer process. The frontier molecular orbitals (MOs) and natural bond orbital (NBO) are also calculated to indicate the intramolecular charge transfer which can be used to explore the tendency of ESIPT reaction. The potential energy surfaces of the ABO and ABT molecules in the S0 and S1 states have been constructed. According to the energy potential barrier of 9.12kcal/mol for ABO molecule and 5.96kcal/mol for ABT molecule, it can be indicated that the proton transfer may occur in the S1 state.
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Affiliation(s)
- Xueli Jia
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - Chaozheng Li
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - Donglin Li
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - Yufang Liu
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China.
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11
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Das K, Satpathi S, Hazra P. Effect of Bile Salt Aggregates on the Prototropic Equilibria of Harmine, a Fluorescent β-Carboline Alkaloid. ChemistrySelect 2018. [DOI: 10.1002/slct.201702817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Konoya Das
- Department of Chemistry; Indian Institute of Science Education and Research (IISER); Pune 411008), Maharashtra India
| | - Sagar Satpathi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER); Pune 411008), Maharashtra India
| | - Partha Hazra
- Department of Chemistry; Indian Institute of Science Education and Research (IISER); Pune 411008), Maharashtra India
- Centre for Energy Science; Indian Institute of Science Education and Research (IISER); Pune 411008), Maharashtra India
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12
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Malarkani K, Sarkar I, Selvam S. Denaturation studies on bovine serum albumin-bile salt system: Bile salt stabilizes bovine serum albumin through hydrophobicity. J Pharm Anal 2018; 8:27-36. [PMID: 29568665 PMCID: PMC5859114 DOI: 10.1016/j.jpha.2017.06.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 06/14/2017] [Accepted: 06/21/2017] [Indexed: 11/25/2022] Open
Abstract
Protein denaturation is under intensive research, since it leads to neurological disorders of severe consequences. Avoiding denaturation and stabilizing the proteins in their native state is of great importance, especially when proteins are used as drug molecules or vaccines. It is preferred to add pharmaceutical excipients in protein formulations to avoid denaturation and thereby stabilize them. The present study aimed at using bile salts (BSs), a group of well-known drug delivery systems, for stabilization of proteins. Bovine serum albumin (BSA) was taken as the model protein, whose association with two BSs, namely sodium cholate (NaC) and sodium deoxycholate (NaDC), was studied. Denaturation studies on the pre-formed BSA-BS systems were carried out under chemical and physical denaturation conditions. Urea was used as the chemical denaturant and BSA-BS systems were subjected to various temperature conditions to understand the thermal (physical) denaturation. With the denaturation conditions prescribed here, the data obtained is informative on the association of BSA-BS systems to be hydrophobic and this effect of hydrophobicity plays an important role in stabilizing the serum albumin in its native state under both chemical and thermal denaturation.
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Affiliation(s)
| | - Ivy Sarkar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Susithra Selvam
- Department of Chemistry, Vel Tech University, Avadi, Chennai 600062, India
- Department of Chemistry, PSG College of Technology, Peelamedu, Coimbatore 641004, India
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13
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Mishra J, Swain J, Mishra AK. Molecular Level Understanding of Sodium Dodecyl Sulfate (SDS) Induced Sol–Gel Transition of Pluronic F127 Using Fisetin as a Fluorescent Molecular Probe. J Phys Chem B 2017; 122:181-193. [DOI: 10.1021/acs.jpcb.7b10170] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jhili Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Jitendriya Swain
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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14
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Tarai M, Mishra AK. Application of Multivariate Curve Resolution–Alternate Least Square Technique on Extracting Pure Spectral Components from Multiple Emitting Systems: a Case Study. J Fluoresc 2017; 27:2023-2036. [DOI: 10.1007/s10895-017-2141-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 07/18/2017] [Indexed: 11/30/2022]
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15
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Yang D, Yang G, Zhao J, Zheng R, Wang Y. A DFT/TDDFT Study on Excited State Process of a Novel Probe 4′-Fluoroflavonol. J CLUST SCI 2017. [DOI: 10.1007/s10876-017-1232-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Maity B, Ahmed SA, Seth D. Interaction of Biologically Active Flavins inside Bile Salt Aggregates: Molecular Level Investigation. J Phys Chem B 2016; 120:9854-66. [PMID: 27557394 DOI: 10.1021/acs.jpcb.6b04870] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work we have studied the photophysics of biologically active flavin molecule lumichrome (LCM) in different bile-salt aggregates. With alteration of the functional groups of the bile salts, the photophysics of confined fluorophore is largely affected and shows difference in their spectral behavior. This study also reveals the selective prototropic species of LCM present in bile salt aggregates. In the presence of the bile salt aggregates, LCM molecule shows excitation and emission wavelength-dependent emission properties, indicating switch over of the structural change of different prototropic form of the LCM molecule. The observation of higher rotational relaxation time in NaDC aggregates compared to NaTC aggregates clearly reflects that NaDC aggregates are more rigid due to its greater hydrophobicity and large in size, which is capable to bind the guest molecule more into their nanoconfined medium. Moreover, due to less acidic nature, NaDC aggregates have more ability to accept hydrogen bond from the LCM molecule and show the selective formation of isoalloxazine N10 anion (A1 monoanionic form) of LCM.
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Affiliation(s)
- Banibrata Maity
- Department of Chemistry, Indian Institute of Technology Patna , Patna 801103, Bihar, India
| | - Sayeed Ashique Ahmed
- Department of Chemistry, Indian Institute of Technology Patna , Patna 801103, Bihar, India
| | - Debabrata Seth
- Department of Chemistry, Indian Institute of Technology Patna , Patna 801103, Bihar, India
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17
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Bhattacharjee S, Chakraborty S, Sengupta PK, Bhowmik S. Exploring the Interactions of the Dietary Plant Flavonoids Fisetin and Naringenin with G-Quadruplex and Duplex DNA, Showing Contrasting Binding Behavior: Spectroscopic and Molecular Modeling Approaches. J Phys Chem B 2016; 120:8942-52. [DOI: 10.1021/acs.jpcb.6b06357] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Snehasish Bhattacharjee
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India
| | - Sandipan Chakraborty
- Department
of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700019, India
| | - Pradeep K. Sengupta
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India
| | - Sudipta Bhowmik
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India
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18
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Zhao J, Yang Y. Excited state proton transfer coupled with twisted intermolecular charge transfer for N,N-dimethylanilino-1,3-diketone in high polar acetonitrile solvent. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.029] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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19
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Sarkar I, Hemamalini A, Das TM, Mishra AK. Introduction of an α,β-unsaturated carbonyl conjugated pyrene–lactose hybrid as a fluorescent molecular probe for micro-scale anisotropic media. RSC Adv 2016. [DOI: 10.1039/c5ra26146e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new fluorescent lactose molecule (pyd-lact) (E)-1-(galactose-β-(1→4)-β-d-glucopyranosyl)-4-(1-pyrene)-but-3-en-2-one, has been synthesized by attaching 1-pyrene-but-3-ene-2-one to lactose.
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Affiliation(s)
- Ivy Sarkar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
| | | | - Thangamuthu Mohan Das
- Department of Organic Chemistry
- University of Madras
- Chennai – 600 025
- India
- Department of Chemistry
| | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
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20
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Effect of environment pH on the photophysics of fisetin in solid lipid nanoparticles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:305-10. [DOI: 10.1016/j.jphotobiol.2015.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 11/20/2022]
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21
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Yang D, Zhao J, Zheng R, Wang Y, Lv J. A DFT/TDDFT investigation of the excited state proton transfer reaction of fisetin chromophore. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:368-374. [PMID: 26143329 DOI: 10.1016/j.saa.2015.06.098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/09/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
In the present work, 3, 3', 4', 7-tetrahydroxyflavone (fisetin), as one of the most extensive distributed flavonoids, has been investigated on the excited state proton transfer (ESPT) based on the time-dependent density functional theory (TDDFT) method. The calculated absorption and fluorescence spectra based on the TDDFT method are in agreement with the experimental results. Two kinds of structures of fisetin chromophore are found in the first excited (S1) state, which may be due to the proton transfer reactive. Hydrogen bond strengthening has been testified in the S1 state based on comparing staple bond lengths and bond angles involved in hydrogen bonding between the S0 state and the S1 state. In addition, the calculated infrared spectra at the O-H stretching vibrational region and calculated hydrogen bond energy also declare the phenomenon of hydrogen bond strengthening. The frontier molecular orbitals (MOs) analysis and Natural bond orbital (NBO) manifest the intramolecular charge transfer of fisetin chromophore, which reveals the tendency of proton transfer. The potential energy surfaces of the S0 and S1 states are constructed to explain the mechanism of the proton transfer in excited state in detail.
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Affiliation(s)
- Dapeng Yang
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; State Key Laboratory of Molecular Reaction Dynamics, Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Jinfeng Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Rui Zheng
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
| | - Yusheng Wang
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
| | - Jian Lv
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
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22
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A detailed theoretical investigation on the excited-state intramolecular proton-transfer mechanism of 3-BTHPB chemosensor. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1664-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Sarkar I, Malini H, Das TM, Mishra AK. Synthesis and evaluation of a glucose attached pyrene, as a fluorescent molecular probe in sugar and non-sugar based micro-heterogeneous media. RSC Adv 2015. [DOI: 10.1039/c5ra11481k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A new fluorescent pyrene–glucose conjugate (pyd-glc), 1-(4,6-O-butylidene-β-d-glucopyranosyl)-4-(1-pyrene)-butan-2-one, has been synthesized by attaching a pyrene molecule to acetal (butylidene) protected glucose via a butane-2-one linker.
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Affiliation(s)
- Ivy Sarkar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
| | - Hema Malini
- Department of Organic Chemistry
- University of Madras
- Chennai – 600 025
- India
| | | | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
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24
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Fan Y, Li Y, Cai H, Li J, Miao J, Fu D, Su K. Three-dimensional fluorescence characteristics of white chrysanthemum flowers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 130:411-415. [PMID: 24810027 DOI: 10.1016/j.saa.2014.04.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 03/18/2014] [Accepted: 04/03/2014] [Indexed: 06/03/2023]
Abstract
White chrysanthemum flower is one of the most popular plants found everywhere in China and used as herbs. In the present work, three-dimensional fluorescence technique was used to discriminate species of white chrysanthemum flowers. Parameters affecting extraction efficiency were investigated. Under the optimal conditions, the three-dimensional fluorescence characteristics of three types of white chrysanthemum flowers were obtained. It was found that there were two main fluorescence peaks with remarkable difference in fluorescence intensity, one was corresponding to flavonoids and another was attributed to chlorophyll-like compounds. There were remarkable differences among the contours of the three white chrysanthemum flowers. Further studies showed that the fluorescence intensity ratios of chlorophyll-like compounds to flavonoids had a certain relationship with the species; those for Huai, Hang and Huangshan white chrysanthemum flowers were 6.9-7.4, 18.9-21.4 and 73.6-84.5, respectively. All of the results suggest that three-dimensional fluorescence spectra can be used for the discrimination of white chrysanthemum flowers with the advantages of low cost, ease for operation and intuition.
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Affiliation(s)
- Yunchang Fan
- College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, China
| | - Yang Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Hongxin Cai
- College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, China.
| | - Jing Li
- Yunnan Academy of Tobacco Science, Kunming 650106, China
| | - Juan Miao
- College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, China
| | - Dexue Fu
- Jiaozuo University, Jiaozuo 454000, China.
| | - Kun Su
- College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, China
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Rao HSP, Desai A, Sarkar I, Mohapatra M, Mishra AK. Photophysical behavior of a new cholesterol attached coumarin derivative and fluorescence spectroscopic studies on its interaction with bile salt systems and lipid bilayer membranes. Phys Chem Chem Phys 2014; 16:1247-56. [DOI: 10.1039/c3cp53895h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sengupta B, Pahari B, Blackmon L, Sengupta PK. Prospect of bioflavonoid fisetin as a quadruplex DNA ligand: a biophysical approach. PLoS One 2013; 8:e65383. [PMID: 23785423 PMCID: PMC3681855 DOI: 10.1371/journal.pone.0065383] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 04/24/2013] [Indexed: 01/30/2023] Open
Abstract
Quadruplex (G4) forming sequences in telomeric DNA and c-myc promoter regions of human DNA are associated with tumorogenesis. Ligands that can facilitate or stabilize the formation and increase the stabilization of G4 can prevent tumor cell proliferation and have been regarded as potential anti-cancer drugs. In the present study, steady state and time-resolved fluorescence measurements provide important structural and dynamical insights into the free and bound states of the therapeutically potent plant flavonoid fisetin (3,3',4',7-tetrahydroxyflavone) in a G4 DNA matrix. The excited state intra-molecular proton transfer (ESPT) of fisetin plays an important role in observing and understanding the binding of fisetin with the G4 DNA. Differential absorption spectra, thermal melting, and circular dichroism spectroscopic studies provide evidences for the formation of G4 DNA and size exclusion chromatography (SEC) proves the binding and 1∶1 stoichiometry of fisetin in the DNA matrix. Comparative analysis of binding in the presence of EtBr proves that fisetin favors binding at the face of the G-quartet, mostly along the diagonal loop. Time resolved fluorescence anisotropy decay analysis indicates the increase in the restrictions in motion from the free to bound fisetin. We have also investigated the fingerprints of the binding of fisetin in the antiparallel quadruplex using Raman spectroscopy. Preliminary results indicate fisetin to be a prospective candidate as a G4 ligand.
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Affiliation(s)
- Bidisha Sengupta
- Department of Chemistry, Tougaloo College, Tougaloo, Mississippi, United States of America
| | - Biswapathik Pahari
- Biophysics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, West Bengal, India
| | - Laura Blackmon
- Department of Chemistry, Tougaloo College, Tougaloo, Mississippi, United States of America
| | - Pradeep K. Sengupta
- Biophysics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, West Bengal, India
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Pahari B, Sengupta B, Chakraborty S, Thomas B, McGowan D, Sengupta PK. Contrasting binding of fisetin and daidzein in γ-cyclodextrin nanocavity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012. [PMID: 23177044 DOI: 10.1016/j.jphotobiol.2012.10.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Steady state and time resolved fluorescence along with anisotropy and induced circular dichroism (ICD) spectroscopy provide useful tools to observe and understand the behavior of the therapeutically important plant flavonoids fisetin and daidzein in γ-cyclodextrin (γ-CDx) nanocavity. Benesi-Hildebrand plots indicated 1:1 stoichiometry for both the supramolecular complexes. However, the mode of the binding of fisetin significantly differs from daidzein in γ-CDx, as is observed from ICD spectra which is further confirmed by docking studies. The interaction with γ-CDx proceeds mainly by the phenyl ring and partly by the chromone ring of fisetin whereas only the phenyl ring takes part for daidzein. A linear increase in the aqueous solubility of the flavonoids is assessed from the increase in the binding of the flavonoids with the γ-CDx cavity, which are determined by the gradual increase in the ICD signal, fluorescence emission as well as increase in fluorescence anisotropy with increasing (γ-CDx). This confirms γ-CDx as a nanovehicle for the flavonoids fisetin and daidzein in improving their bioavailability.
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Affiliation(s)
- Biswapathik Pahari
- Biophysics Division, Saha Institute of Nuclear Physics, Kolkata 700 064, India
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28
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Mandal S, Ghosh S, Banerjee C, Rao VG, Sarkar N. Modulation of Photophysics and Photodynamics of 1′-Hydroxy-2′-acetonaphthone (HAN) in Bile Salt Aggregates: A Study of Polarity and Nanoconfinement Effects. J Phys Chem B 2012; 116:8780-92. [DOI: 10.1021/jp302435h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sarthak Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Surajit Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Vishal Govind Rao
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
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Pahari B, Chakraborty S, Chaudhuri S, Sengupta B, Sengupta PK. Binding and antioxidant properties of therapeutically important plant flavonoids in biomembranes: Insights from spectroscopic and quantum chemical studies. Chem Phys Lipids 2012; 165:488-96. [DOI: 10.1016/j.chemphyslip.2011.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 10/17/2011] [Accepted: 10/19/2011] [Indexed: 11/25/2022]
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Mohapatra M, Mishra AK. Photophysical behavior of fisetin in dimyristoylphosphatidylcholine liposome membrane. J Phys Chem B 2011; 115:9962-70. [PMID: 21766844 DOI: 10.1021/jp1123212] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A detailed photophysical study of the plant flavonoid fisetin in a dimyristoylphosphatidylcholine (DMPC) bilayer membrane has been carried out. Fisetin is found to partition well into the membrane (K(p) = (4.6 ± 0.5) × 10(5) in solid gel phase and (5.1 ± 0.5) × 10(5) in liquid crystalline phase). A fluorescence quenching study using cetylpyridinium chloride (CPC) as the quencher suggests that fisetin molecules are generally present near the head group region of the lipid bilayer membrane. The temperature dependence of the fluorescence lifetime indicates a local heterogeneity in the distribution of fisetin within the bilayer membrane. The phototautomer form of fisetin, which is the primary emitting species from the lipid membrane, has a large Stoke's shift (175 nm) and fluoresces with an intense green fluorescence, which can make the molecule a good dye for marker and bioimaging applications. Membrane-bound fisetin shows sensitive variations of fluorescence intensity, lifetime, and anisotropy parameters in cholesterol-containing DMPC membranes, in mixed phospholipids, and as a function of temperature. This suggests that fisetin can be an efficient fluorescent molecular probe for sensing lipid bilayer membrane related changes. The location of fisetin in the membrane and the observed cholesterol-induced expulsion of fisetin may possibly have implications in the antioxidant activity of fisetin.
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Affiliation(s)
- Monalisa Mohapatra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036
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