1
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Di Nunzio MR, Douhal A. Robust Inclusion Complex of Topotecan Comprised within a Rhodamine-Labeled β-Cyclodextrin: Competing Proton and Energy Transfer Processes. Pharmaceutics 2023; 15:1620. [PMID: 37376069 DOI: 10.3390/pharmaceutics15061620] [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: 03/31/2023] [Revised: 04/19/2023] [Accepted: 05/19/2023] [Indexed: 06/29/2023] Open
Abstract
Monitoring the biological fate of medicaments within the environments of cancer cells is an important challenge which is nowadays the object of intensive studies. In this regard, rhodamine-based supramolecular systems are one of the most suitable probes used in drug delivery thanks to their high emission quantum yield and sensitivity to the environment which helps to track the medicament in real time. In this work, we used steady-state and time-resolved spectroscopy techniques to investigate the dynamics of the anticancer drug, topotecan (TPT), in water (pH ~6.2) in the presence of a rhodamine-labeled methylated β-cyclodextrin (RB-RM-βCD). A stable complex of 1:1 stoichiometry is formed with a Keq value of ~4 × 104 M-1 at room temperature. The fluorescence signal of the caged TPT is reduced due to: (1) the CD confinement effect; and (2) a Förster resonance energy transfer (FRET) process from the trapped drug to the RB-RM-βCD occurring in ~43 ps with 40% efficiency. These findings provide additional knowledge about the spectroscopic and photodynamic interactions between drugs and fluorescent functionalized CDs, and may lead to the design of new fluorescent CD-based host-guest nanosystems with efficient FRET to be used in bioimaging for drug delivery monitoring.
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Affiliation(s)
- Maria Rosaria Di Nunzio
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica and INAMOL, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain
| | - Abderrazzak Douhal
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica and INAMOL, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain
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2
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Mu H, Li H, Sun C, Gao J, Yang M, Xin C, Jin G. Different competition mechanism between ESPT and TICT process regulated by protic and aprotic solvent in DHP. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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3
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Thanasekaran P, Lin B, Valaboju A, Lan C, Chang C, Lee C, Wu J, Bhattacharya D, Tseng T, Lee H, Hsu C, Lu K. Molecular mechanics of glove‐like re(I) metallacycles: Toward light‐activated molecular catchers. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Bo‐Chao Lin
- Institute of Chemistry, Academia Sinica Taipei Taiwan
| | | | | | - Che‐Hao Chang
- Institute of Chemistry, Academia Sinica Taipei Taiwan
| | - Chung‐Chou Lee
- Material and Chemical Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan
| | - Jing‐Yun Wu
- Department of Applied Chemistry National Chi Nan University Nantou Taiwan
| | | | - Tien‐Wen Tseng
- Department of Chemical Engineering National Taipei University of Technology Taipei Taiwan
| | | | - Chao‐Ping Hsu
- Institute of Chemistry, Academia Sinica Taipei Taiwan
- Division of Physics National Center for Theoretical Sciences Taipei Taiwan
| | - Kuang‐Lieh Lu
- Institute of Chemistry, Academia Sinica Taipei Taiwan
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4
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Ghosh R, Singh S, Mukherjee D, Mondal S, Das M, Pal U, Adhikari A, Bhushan A, Bose S, Bhattacharyya SS, Pal D, Saha-Dasgupta T, Bhattacharyya M, Bhattacharyya D, Mallick AK, Das R, Pal SK. Host-assisted delivery of a model drug to genomic DNA: Key information from ultrafast spectroscopy and in silico study. Chembiochem 2022; 23:e202200109. [PMID: 35225409 DOI: 10.1002/cbic.202200109] [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: 02/21/2022] [Indexed: 11/10/2022]
Abstract
Intended drug delivery to a target without adverse effect is one of the major criteria for its acceptance in real use. Herein, we have made an attempt to explore the delivery efficacy of SDS surfactant in a monomer and micellar stage during the delivery of model drug, Toluidine Blue (TB) from micellar cavity to DNA. Molecular recognition of pre-micellar SDS encapsulated TB with DNA occurs at a rate constant (k1~652 s-1). On the contrary, no significant release of encapsulated TB at micellar concentration was observed within the experimental time frame. This originated from the higher binding affinity of TB towards the nano cavity of SDS at micellar concentration which doesn't allow the delivery of TB from the nano cavity of SDS micelle to DNA. Thus, molecular recognition controls the extent of DNA recognition by TB which in turn modulates the rate of delivery of TB from SDS in a concentration dependent morphology.
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Affiliation(s)
- Ria Ghosh
- S N Bose National Centre for Basic Sciences, CBMS, Block JD, Sector 3, Salt lake,, 700106, Kolkata, INDIA
| | - Soumendra Singh
- S N Bose National Centre for Basic Sciences, Technical Research Centre, Block JD, Sector 3, Salt Lake, 700106, Kolkata, INDIA
| | - Dipanjan Mukherjee
- S N Bose National Centre for Basic Sciences, CBMS, Block JD, Sector 3, Salt lake, 700106, Kolkata, INDIA
| | - Susmita Mondal
- S N Bose National Centre for Basic Sciences, CBMS, Block JD, Sector 3, Salt lake, 700106, Kolkata, INDIA
| | - Monojit Das
- Vidyasagar University, Zoology, 7221102, Midnapore, INDIA
| | - Uttam Pal
- S N Bose National Centre for Basic Sciences, Technical Research Centre, Block JD, Sector 3, Salt Lake, 700106, Kolkata, INDIA
| | - Aniruddha Adhikari
- S N Bose National Centre for Basic Sciences, CBMS, Block JD, Sector 3, Salt lake, 700106, Kolkata, INDIA
| | - Aman Bhushan
- Thapar University: Thapar Institute of Engineering and Technology, Biotechnology, Bhadson Road, Patiala, Punjab, 147004, Patiala, INDIA
| | - Surajit Bose
- KSDJ Dental College and Hospital, Oral and Maxillofacial Pathology, 700002, Kolkata, INDIA
| | | | - Debasish Pal
- Uluberia College, Zoology, 711315, Howrah, INDIA
| | - Tanusri Saha-Dasgupta
- S N Bose National Centre for Basic Sciences, CMPS, Block JD, Sector 3, Salt Lake, 700106, Kolkata, INDIA
| | - Maitree Bhattacharyya
- University of Calcutta, Biochemistry, 35, Ballygunge Circular Rd, Ballygunge, 700019, Kolkata, INDIA
| | - Debasis Bhattacharyya
- Nilratan Sircar Medical College and Hospital, Gynecology and Obstetrics, 138, AJC Bose Road, Sealdah, Raja Bazar,, 700014, Kolkata, INDIA
| | - Asim Kumar Mallick
- Nilratan Sircar Medical College and Hospital, Pediatric Medicine, 138, AJC Bose Road, Sealdah, Raja Bazar, 700014, Kolkata, INDIA
| | - Ranjan Das
- West Bengal State University, Chemistry, 700126, Kolkata, INDIA
| | - Samir Kumar Pal
- SNBNCBS, CBMS, Block JD, Sector III, Salt Lake City, 700098, Kolkata, INDIA
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5
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Nho HW, Park JH, Adhikari A, Kwon OH. Acid–base reaction of a cationic hydration probe in vicinity of anionic interface of AOT reverse micelles. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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de Bettencourt-Dias A, Beeler RM, Zimmerman JR. Secondary-Sphere Chlorolanthanide(III) Complexes with a 1,3,5-Triazine-Based Ligand Supported by Anion-π, π-π, and Hydrogen-Bonding Interactions. Inorg Chem 2020; 59:151-160. [PMID: 31509390 DOI: 10.1021/acs.inorgchem.9b01804] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2,4,6-Dipicolylamine-functionalized 1,3,5-triazine (dpat) was isolated. When reacted with LaCl3, compound [(LaCl6)(H3dpat)][H2O]2 (1) formed, which crystallized in the monoclinic P21/n space group with parameters a = 11.47 Å, b = 19.22 Å, c = 20.98 Å, V = 4652.02 Å, and β = 90.53°. When reacted with NdCl3, the complex [NdCl3(H2O)4(H3dpat)][Cl]3(MeOH)2 (2) crystallized in the monoclinic P21/n space group with unit cell parameters a = 20.05 Å, b = 12.81 Å, c = 20.64 Å, V = 5004.40 Å, and β = 110.20°. In both cases, the dpat ligand forms a bowl-shaped cavity that partially envelops the LnIII-containing central unit, which is anionic in 1 and neutral in 2. The formation of these outer-sphere complexes is supported by secondary interactions, including π-π stacking, hydrogen bonding, and anion-π between the chlorolanthanide(III) fragment and the electron-deficient 1,3,5-triazine ring. Evidence of protonation of the pyridine rings in dpat was substantiated through the isolation of [H2dpat][Cl]2 (3). This compound crystallized in the monoclinic C2/c space group with parameters a = 11.93 Å, b = 20.22 Å, c = 15.28 Å, V = 3664.97 Å, and β = 94.35°. Four pyridine rings are pairwise protonated in 3. dpat showed a moderate ability to extract LaIII from an aqueous to an organic phase, indicating its potential, through judicious manipulation of secondary-sphere interactions, as the starting point for efficient extractants for LnIII ions.
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Affiliation(s)
| | - Rose M Beeler
- Department of Chemistry , University of Nevada , Reno , Nevada 89557-0216 , United States
| | - Joshua R Zimmerman
- Department of Chemistry , University of Nevada , Reno , Nevada 89557-0216 , United States
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7
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Gharat PM, Pal H, Dutta Choudhury S. Contrasting Modulations in the Photophysics of Chrysazine with Cyclodextrin Hosts. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111954] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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de Bettencourt-Dias A, Beeler RM, Zimmerman JR. Anion-π and H-Bonding Interactions Supporting Encapsulation of [Ln(NO3)6/5]3–/2– (Ln = Nd, Er) with a Triazine-Based Ligand. J Am Chem Soc 2019; 141:15102-15110. [DOI: 10.1021/jacs.9b05566] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Rose M. Beeler
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Joshua R. Zimmerman
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
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9
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Maffeis V, Mavreas K, Monti F, Mamais M, Gustavsson T, Chrysina ED, Markovitsi D, Gimisis T, Venturini A. Multiscale time-resolved fluorescence study of a glycogen phosphorylase inhibitor combined with quantum chemistry calculations. Phys Chem Chem Phys 2019; 21:7685-7696. [PMID: 30912774 DOI: 10.1039/c8cp07538g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A fluorescence study of N1-(β-d-glucopyranosyl)-N4-[2-acridin-9(10H)-onyl]-cytosine (GLAC), the first fluorescent potent inhibitor of glycogen phosphorylase (GP), in neutral aqueous solution, is presented herein. Quantum chemistry (TD-DFT) calculations show the existence of several conformers both in the ground and first excited states. They result from rotations of the acridone and cytosine moieties around an NH bridge which may lead to the formation of non-emitting charge-transfer states. The fingerprints of various conformers have been detected by time-resolved fluorescence spectroscopy (fluorescence upconversion and time-correlated single photon counting) and identified using as criteria their energy, polarization and relative population resulting from computations. Such an analysis should contribute to the design of new GP inhibitors with better fluorescence properties, suitable for imaging applications.
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Affiliation(s)
- Valentin Maffeis
- LIDYL, CEA, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France.
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10
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Duarte LGTA, Germino JC, Braga CDÁ, Barboza CA, Atvars TDZ, Santos FDS, Rodembusch FS. Photoacidity as a tool to rationalize excited state intramolecular proton transfer reactivity in flavonols. Photochem Photobiol Sci 2018; 17:231-238. [DOI: 10.1039/c7pp00334j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Determination of acidic strengths at the electronic ground and excited states of flavonol derivatives.
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Affiliation(s)
| | | | - Cláudia de Ávila Braga
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- Porto Alegre
- Brazil
| | | | | | - Fabiano da Silveira Santos
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- Porto Alegre
- Brazil
| | - Fabiano Severo Rodembusch
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- Porto Alegre
- Brazil
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11
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Alarcos N, Cohen B, Ziółek M, Douhal A. Photochemistry and Photophysics in Silica-Based Materials: Ultrafast and Single Molecule Spectroscopy Observation. Chem Rev 2017; 117:13639-13720. [PMID: 29068670 DOI: 10.1021/acs.chemrev.7b00422] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Silica-based materials (SBMs) are widely used in catalysis, photonics, and drug delivery. Their pores and cavities act as hosts of diverse guests ranging from classical dyes to drugs and quantum dots, allowing changes in the photochemical behavior of the confined guests. The heterogeneity of the guest populations as well as the confinement provided by these hosts affect the behavior of the formed hybrid materials. As a consequence, the observed reaction dynamics becomes significantly different and complex. Studying their photobehavior requires advanced laser-based spectroscopy and microscopy techniques as well as computational methods. Thanks to the development of ultrafast (spectroscopy and imaging) tools, we are witnessing an increasing interest of the scientific community to explore the intimate photobehavior of these composites. Here, we review the recent theoretical and ultrafast experimental studies of their photodynamics and discuss the results in comparison to those in homogeneous media. The discussion of the confined dynamics includes solvation and intra- and intermolecular proton-, electron-, and energy transfer events of the guest within the SBMs. Several examples of applications in photocatalysis, (photo)sensors, photonics, photovoltaics, and drug delivery demonstrate the vast potential of the SBMs in modern science and technology.
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Affiliation(s)
- Noemí Alarcos
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Marcin Ziółek
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University , Umultowska 85, 61-614 Poznań, Poland
| | - Abderrazzak Douhal
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
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12
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Sengupta C, Sarangi MK, Sau A, Basu S. Micellar control over tautomerization and photo-induced electron transfer of Lumichrome in the presence of aliphatic and aromatic amines: a transient absorption study. Methods Appl Fluoresc 2017; 5:014008. [PMID: 28248651 DOI: 10.1088/2050-6120/aa5d2b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Lumichrome (Lc), a molecule consisting of a trinuclear alloxazine moiety is our present subject of interest. This molecule is subjected to tautomerization in the presence of pyridine, acetic acid, etc, through the formation of an eight-membered ring. In our present contribution, we have attempted to analyze the influence of the presence of an aliphatic amine, triethylamine (TEA) and an aromatic amine, N,N-dimethylaniline (DMA) in the double proton transfer step of the tautomerization as well as the photo-induced electron transfer (PET) from those amines to Lc. We have studied these phenomena within micelles, anionic and neutral, to observe the effect of confinement. Through our experiments, it could be stated that along with tautomerization and proton transfer, there is also evidence of PET in triplet excited state.
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Affiliation(s)
- Chaitrali Sengupta
- Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700 064, India
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13
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Santos FS, Ramasamy E, Ramamurthy V, Rodembusch FS. Photoinduced electron transfer across an organic molecular wall: octa acid encapsulated ESIPT dyes as electron donors. Photochem Photobiol Sci 2017; 16:840-844. [DOI: 10.1039/c7pp00065k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Efficient photoinduced electron transfer from proton transfer dyes encapsulated within water soluble supramolecular host octa acid to electron acceptors present outside the capsule was observed in aqueous solution.
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Affiliation(s)
- Fabiano S. Santos
- Department of Chemistry
- University of Miami
- Coral Gables
- USA
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
| | | | - V. Ramamurthy
- Department of Chemistry
- University of Miami
- Coral Gables
- USA
| | - Fabiano S. Rodembusch
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre
- Brazil
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14
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Das I, Panja S, Halder M. Modulation and Salt-Induced Reverse Modulation of the Excited-State Proton-Transfer Process of Lysozymized Pyranine: The Contrasting Scenario of the Ground-State Acid–Base Equilibrium of the Photoacid. J Phys Chem B 2016; 120:7076-87. [DOI: 10.1021/acs.jpcb.6b04111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ishita Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sudipta Panja
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Mintu Halder
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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15
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Tsvetkov VB, Solov'eva AB, Melik-Nubarov NS. Computer modeling of the complexes of Chlorin e6 with amphiphilic polymers. Phys Chem Chem Phys 2015; 16:10903-13. [PMID: 24765639 DOI: 10.1039/c3cp55510k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Recently it has been shown that Chlorin e6 (Ce6) when complexed with Pluronics (hydrophilic ethylene and propylene oxide block copolymers) and poly(N-vinylpyrrolidone) (PVP) exhibits considerably higher phototoxicity towards tumor cells than free Ce6. The present work aimed to model Ce6 interactions with hydrophilic Pluronic F127 and PVP and find out the nature of intermolecular forces stabilizing these complexes. Modeling included 3 steps: (i) application of molecular dynamics to study polymer folding using AMBER 8 program, (ii) evaluation of partial charges in the Ce6 molecule using different quantum mechanical, semi-empirical and topological approaches and (iii) docking analysis of Ce6 interactions with polymer coils using AUTODOCK 4.2. It was found that the folding in regular polymers does not occur stochastically, but involves the formation of "primary" helical structures, which further combined to form hairpin-like "secondary" structures. The latter in turn associated to form coils with minimal solvent accessible hydrophobic area. The Ce6 ring lies flat on the surface of the polymer coil at the interface between hydrophobic and hydrophilic regions. Calculations showed higher affinity of Ce6 for PVP in comparison to Pluronic and revealed marginal contribution of Coulomb forces to the stabilization of both complexes, which are mainly stabilized by van der Waals and hydrogen interactions.
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Affiliation(s)
- Vladimir B Tsvetkov
- Institute for Physical-Chemical Medicine, Malaya Pirogovskaya Str., 1a, Moscow 119435, Russia.
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16
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Nairat M, Konar A, Kaniecki M, Lozovoy VV, Dantus M. Investigating the role of human serum albumin protein pocket on the excited state dynamics of indocyanine green using shaped femtosecond laser pulses. Phys Chem Chem Phys 2015; 17:5872-7. [DOI: 10.1039/c4cp04984e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
When indocyanine green (ICG) is confined inside the pocket of human serum albumin its triplet state formation is mitigated and coherent vibrational motion becomes more observable.
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Affiliation(s)
- Muath Nairat
- Department of Chemistry
- Michigan State University
- East Lansing
- USA
| | | | - Marie Kaniecki
- Department of Chemistry
- Michigan State University
- East Lansing
- USA
| | | | - Marcos Dantus
- Department of Chemistry
- Michigan State University
- East Lansing
- USA
- Department of Physics and Astronomy
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17
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Ghosh S, Banik D, Roy A, Kundu N, Kuchlyan J, Sarkar N. Spectroscopic investigation of the binding interactions of a membrane potential molecule in various supramolecular confined environments: contrasting behavior of surfactant molecules in relocation or release of the probe between nanocarriers and DNA surface. Phys Chem Chem Phys 2014; 16:25024-38. [DOI: 10.1039/c4cp03178d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Santos FS, Ramasamy E, Ramamurthy V, Rodembusch FS. Excited state chemistry of flavone derivatives in a confined medium: ESIPT emission in aqueous media. Photochem Photobiol Sci 2014; 13:992-6. [PMID: 24901799 DOI: 10.1039/c4pp00096j] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The excited state behavior of two flavone derivatives 3-hydroxyflavone and 4'-N,N-diethylaminoflavonol in a confined medium indicates that supramolecular effects could alter the nature of the fluorescence emission. Within the octa acid host the neutral unionized species of these two dyes are present showing large Stokes shifted emission due to intramolecular proton transfer, a pattern different from that in aqueous medium.
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Affiliation(s)
- Fabiano S Santos
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124, USA
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19
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Martin C, Cohen B, Gaamoussi I, Ijjaali M, Douhal A. Ultrafast Dynamics of C30 in Solution and within CDs and HSA Protein. J Phys Chem B 2014; 118:5760-71. [DOI: 10.1021/jp5026575] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Cristina Martin
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
| | - Issam Gaamoussi
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
- Laboratorie
de Chimie de la Matière Condensée, Faculté des
Sciences et Techniques, University of Sidi Mohamed Ben Abdellah, Fez, Morocco 2202
| | - Mustapha Ijjaali
- Laboratorie
de Chimie de la Matière Condensée, Faculté des
Sciences et Techniques, University of Sidi Mohamed Ben Abdellah, Fez, Morocco 2202
| | - Abderrazzak Douhal
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
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20
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Ganguly A, Paul BK, Ghosh S, Dalapati S, Guchhait N. Interaction of a potential chloride channel blocker with a model transport protein: a spectroscopic and molecular docking investigation. Phys Chem Chem Phys 2014; 16:8465-75. [DOI: 10.1039/c3cp53843e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Saha R, Rakshit S, Pal SK. Molecular recognition of a model globular protein apomyoglobin by synthetic receptor cyclodextrin: effect of fluorescence modification of the protein and cavity size of the receptor in the interaction. J Mol Recognit 2013; 26:568-77. [DOI: 10.1002/jmr.2301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 07/17/2013] [Accepted: 07/30/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Ranajay Saha
- Department of Chemical, Biological and Macromolecular Sciences; S.N. Bose National Centre for Basic Sciences; Block JD, Sector III Salt Lake Kolkata 700098 India
| | - Surajit Rakshit
- Department of Chemical, Biological and Macromolecular Sciences; S.N. Bose National Centre for Basic Sciences; Block JD, Sector III Salt Lake Kolkata 700098 India
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences; S.N. Bose National Centre for Basic Sciences; Block JD, Sector III Salt Lake Kolkata 700098 India
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Wang Y, Cohen B, Aykaç A, Vargas-Berenguel A, Douhal A. Femto- to micro-second photobehavior of photosensitizer drug trapped within a cyclodextrin dimer. Photochem Photobiol Sci 2013; 12:2119-29. [PMID: 24061337 DOI: 10.1039/c3pp50179e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interactions of 5,10,15,20-tetrakis(4-sulfonatophenyl)-porphyrin (TSPP, a singlet oxygen photosensitiser molecule) with a hexa-2,4-diynediyl bridged β-cyclodextrin dimer (CD-CD) in aqueous solutions of pH 7 were studied using steady-state UV-visible absorption/emission and femto- to millisecond time-resolved spectroscopy. TSPP forms 1 : 1 complexes with CD-CD (K(e) = 1.9 × 10(8) M(-1) at 293 K). The value of K(e) indicates a high affinity of TSPP to form complexes with CD-CD. The chemical nano-cavity has a notable effect on the fluorescence lifetimes of the Q(x) state (9.3 ns in water and 10.8 ns in CD-CD). The rotational times (410 ps for TSPP in water and 0.03 ns (12%) and 1.1 ns (88%) for the TSPP:CD-CD complexes) indicate the robustness of the formed entities, and fast depolarization of emission, most probably involving the porphyrin skeleton and phenyl ring motions. The ultrafast femtosecond component (60-100 fs) of TSPP is moderately affected by the confining environment, which instead strongly influences the ps component (1-2 ps in water and 5 ps within CD-CD) assigned to the vibrational relaxation of the Q(x) state. Moreover, a 50 ps component emerges in the emission transients in the 640-720 nm range, and which is assigned to a thermalization of the hot Q(x) state. The effect of O2 on the triplet state of the encapsulated TSPP was also studied and discussed in light of the shielding effect of the CD-CD cavity. We observed comparable quantum yield (0.62 and 0.69) of the generated singlet molecular oxygen of TSPP without and with CD-CD. We believe that our results on the molecular interaction between TSPP and CD-CD from femtosecond to millisecond regime at both ground and electronically first excited states give relevant information for improving our understanding of this kind of caged drugs, and thus for a better design of drug:nanocarrier complexes. A particular implication for the use of CD-CD as a drug carrier is the high affinity of this host for complex formation with TSPP, while the yield of singlet oxygen generation is still high.
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Affiliation(s)
- Yilun Wang
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain.
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23
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di Nunzio MR, Wang Y, Douhal A. Spectroscopy and dynamics of topotecan anti-cancer drug comprised within cyclodextrins. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Jana S, Dalapati S, Guchhait N. Excited State Intramolecular Charge Transfer Suppressed Proton Transfer Process in 4-(Diethylamino)-2-hydroxybenzaldehyde. J Phys Chem A 2013; 117:4367-76. [DOI: 10.1021/jp3120463] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sankar Jana
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road,
Kolkata-700009,
India
| | - Sasanka Dalapati
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road,
Kolkata-700009,
India
| | - Nikhil Guchhait
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road,
Kolkata-700009,
India
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25
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Chipem FAS, Behera SK, Krishnamoorthy G. Enhancing Excited State Intramolecular Proton Transfer in 2-(2′-Hydroxyphenyl)benzimidazole and Its Nitrogen-Substituted Analogues by β-Cyclodextrin: The Effect of Nitrogen Substitution. J Phys Chem A 2013; 117:4084-95. [DOI: 10.1021/jp311438s] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Francis A. S. Chipem
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Santosh Kumar Behera
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - G. Krishnamoorthy
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
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26
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Filip Z, Jan K, Vendula S, Jana KZ, Kamil M, Kamil K. Albumin and α1-acid glycoprotein: old acquaintances. Expert Opin Drug Metab Toxicol 2013; 9:943-54. [DOI: 10.1517/17425255.2013.790364] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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