1
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Satapathi D, Das M, Das UK, Laha S, Kundu P, Choudhuri I, Bhattacharya N, Samanta BC, Chattopadhyay N, Maity T. Experimental and molecular modelling demonstration of effective DNA and protein binding as well as anticancer potential of two mononuclear Cu(II) and Co(II) complexes with isothiocyanate and azide as anionic residues. Int J Biol Macromol 2024; 275:133716. [PMID: 38977049 DOI: 10.1016/j.ijbiomac.2024.133716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 07/03/2024] [Accepted: 07/05/2024] [Indexed: 07/10/2024]
Abstract
In the present study, one mononuclear Cu(II) [CuL(SCN)] (1) and one mononuclear Co(II) [CoLN3] (2) complexes, with a Schiff base ligand (HL) formed by condensation of 2-picolylamine and salicylaldehyde, have been successfully developed and structurally characterized. The square planer geometry of both complexes is fulfilled by the coordination of one deprotonated ligand and one ancillary ligand SCN-(1) or N3-(2) to the metal centre. Binding affinities of both complexes with deoxyribonucleic acid (DNA) and human serum albumin (HSA) are investigated using several biophysical and spectroscopic techniques. High values of the macromolecule-complex binding constants and other results confirm the effectiveness of both complexes towards binding with DNA and HSA. The determined values of the thermodynamic parameters support spontaneous interactions of both complexes with HSA, while fluorescence displacement and DNA melting studies establish groove-binding interactions with DNA for both complexes 1 and 2. The molecular modelling study validates the experimental findings. Both complexes are subjected to an MTT test establishing the anticancer property of complex 1 with lower risk to normal cells, confirmed by the IC50 values of the complex for HeLa cancer cells and HEK normal cells. Finally, a nuclear staining analysis reveals that the complexes have caused apoptotic cell death.
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Affiliation(s)
- Dibyendu Satapathi
- Department of Chemistry, Prabhat Kumar College, Purba Medinipur, Contai, West Bengal 721404, India
| | - Manik Das
- Department of Chemistry, Prabhat Kumar College, Purba Medinipur, Contai, West Bengal 721404, India
| | - Uttam Kumar Das
- Department of Chemistry, School of Physical Science, Mahatma Gandhi Central University, Bihar, India
| | - Soumik Laha
- Indian Institute of Chemical Biology, Jadavpur, Kolkata, West Bengal, India
| | - Pronab Kundu
- Department of Chemistry, Presidency University, Yelahanka, Bengaluru 560064, India
| | - Indranil Choudhuri
- Department of Biotechnology, Panskura Banamali College, Panskura, West Bengal, India
| | - Nandan Bhattacharya
- Department of Biotechnology, Panskura Banamali College, Panskura, West Bengal, India
| | | | | | - Tithi Maity
- Department of Chemistry, Prabhat Kumar College, Purba Medinipur, Contai, West Bengal 721404, India.
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2
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Mudi A, Ray S, Bera M, Dolai M, Das M, Kundu P, Laha S, Choudhuri I, Chandra Samanta B, Bhattacharyya N, Maity T. A multi-spectroscopic and molecular docking approach for DNA/protein binding study and cell viability assay of first-time reported pendent azide bearing Cu(II)-quercetin and dicyanamide bearing Zn(II)-quercetin complexes. Heliyon 2023; 9:e22712. [PMID: 38125469 PMCID: PMC10731082 DOI: 10.1016/j.heliyon.2023.e22712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023] Open
Abstract
In the current study, one new quercetin-based Zn(II) complex [Zn(Qr)(CNNCN)(H2O)2] (Complex 1) which is developed by condensation of quercetin with ZnCl2 in the presence of NaN(CN)2 and Cu(II) complex [Cu(Qr)N3(CH3OH)(H2O)] (complex 2) which is developed by the condensation reaction of quercetin and CuCl2 in presence of NaN3, are thoroughly examined in relation to their use in biomedicine. The results of several spectroscopic studied confirm the structure of both the complexes and the Density Functional Theory (DFT) study helps to optimize the structure of complex 1 and 2. After completion of the identification process, DNA and Human Serum Albumin (HSA) binding efficacy of both the investigated complexes are performed by implementing a long range of biophysical studies and a thorough analysis of the results unveils that complex 1 has better interaction efficacy with the macromolecules than complex 2. The binding efficacy of complex 1 is comparatively higher towards both macromolecules because of its pure groove binding mode during interaction with DNA and the presence of an extra H-bond during connection with HSA. The experimental host-guest binding results is fully validated by molecular docking study. Interestingly complex 1 shows better antioxidant properties than complex 2, as well as quercetin, and it has strong anticancer property with minimal damage to normal cells, which is proved by the MTT assay study. Better DNA and HSA binding efficacy of 1 may be the reason for the better anticancer property of complex 1.
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Affiliation(s)
- Anupam Mudi
- Department of Botany, Behala College, Behala, India
| | - Shubham Ray
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Manjushree Bera
- Department of Nutrition, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Malay Dolai
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Manik Das
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Pronab Kundu
- Department of Chemistry, Presidency University, Yelahanka, Bengaluru, 560064, India
| | | | | | | | | | - Tithi Maity
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
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3
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Nath S, Bhattacharya B, Sarkar U, Singh TS. Solvent Effects on the Photophysical Properties of a Donor-acceptor Based Schiff Base. J Fluoresc 2022; 32:1321-1336. [PMID: 35366165 DOI: 10.1007/s10895-022-02905-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/13/2022] [Indexed: 11/24/2022]
Abstract
In this work, a donor-acceptor substituted aromatic system ((E)-N-((E)-3-(4 (dimethylamino)phenyl) allylidene)-4-(trifluoromethyl) benzenamine (DPATB) has been synthesized and its detailed photophysics of intramolecular charge transfer process have been explored on the basis of steady state absorption, fluorescence and time resolved spectroscopy in combination with density functional theory calculations. Large solvent dependency fluorescence spectral shift and the calculated large excited state dipole moment clearly indicate an efficient charge transfer occurring from the donor group to the acceptor moiety in the excited state. Effect on addition of acid and pH on steady state spectral properties further reveals excited state charge transfer character. Quantum chemical calculations were performed in order to study the conformation and polarity of DPATB at their ground as well as excited electronic states. The HOMO and LUMO molecular orbital pictures are obtained at DFT level using B3LYP functional and 6-311 + g(d,p) basis set which clearly support excited state intramolecular charge transfer process. The molecular electrostatic potential maps for the optimized ground state, donor twisted and acceptor twisted geometry shed insight on the electrostatic potential and charge distribution in a system which gives information about the reacting site of the probe and nature of the reaction. In this work, detailed photophysics of excited state intramolecular charge transfer process in donor-acceptor system (DPATB) was evaluated using steady state and time-resolved fluorescence spectroscopy in combination with density functional theory calculations. Large solvent dependency fluorescence spectral shift and the calculated large excited state dipole moment clearly indicate an efficient charge transfer occurring in DPATB. Molecular orbital pictures as obtained from DFT based computational analysis reveals a significant change in the distribution of electron density upon transition from HOMO to LUMO which confirms an ICT process occurring from the donor group to the acceptor moiety in the excited state.
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Affiliation(s)
- Surjatapa Nath
- Department of Chemistry, Assam University, Silchar, Assam, India
| | | | - Utpal Sarkar
- Department of Physics, Assam University, Silchar, India
| | - T Sanjoy Singh
- Department of Chemistry, Assam University, Silchar, Assam, India.
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4
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Zhang D, Pan J, Gong D, Zhang G. Groove binding of indole-3-butyric acid to calf thymus DNA: Spectroscopic and in silico approaches. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118323] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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5
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Leitão MIPS, Rama Raju B, Cerqueira NMFSA, Sousa MJ, Gonçalves MST. Benzo[a]phenoxazinium chlorides: Synthesis, antifungal activity, in silico studies and evaluation as fluorescent probes. Bioorg Chem 2020; 98:103730. [PMID: 32199304 DOI: 10.1016/j.bioorg.2020.103730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/05/2020] [Accepted: 03/05/2020] [Indexed: 12/16/2022]
Abstract
Four new benzo[a]phenoxazinium chlorides with combinations of chloride, ethyl ester and methyl as terminals of the amino substituents were synthesized. These compounds were characterized and their optical properties were studied in absolute dry ethanol and water. Their antiproliferative activity was tested against Saccharomyces cerevisiae in a broth microdilution assay, along with an array of 36 other benzo[a]phenoxazinium chlorides. Minimum Inhibitory Concentration (MIC) values between 1.56 and >200 µM were observed. Fluorescence microscopy studies, used to assess the intracellular distribution of the dyes, showed that these benzo[a]phenoxazinium chlorides function as efficient and site specific probes for the detection of the vacuole membrane. The added advantage of some of the compounds, that displayed the lower MIC values, was the simultaneous staining of both the vacuole membrane and the perinuclear membrane of endoplasmic reticulum (ER). Molecular docking studies were performed on the human membrane protein oxidosqualene cyclase (OSC), using the crystal structure available on PDB (code 1W6K). The results showed that these most active compounds accommodated better in the active sites of ER enzyme OSC suggesting this enzyme as a potential target. As a whole, the results demonstrate that the benzo[a]phenoxazinium chlorides are interesting alternatives to the available commercial dyes. Changes in the substituents of these compounds can tailor both their staining specificity and antimicrobial activity.
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Affiliation(s)
- Maria Inês P S Leitão
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Centre of Molecular and Environmental Biology/Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - B Rama Raju
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Centre of Physics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Nuno M F S A Cerqueira
- REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Maria João Sousa
- Centre of Molecular and Environmental Biology/Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - M Sameiro T Gonçalves
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Maurya N, Alzahrani KA, Patel R. Probing the Intercalation of Noscapine from Sodium Dodecyl Sulfate Micelles to Calf Thymus Deoxyribose Nucleic Acid: A Mechanistic Approach. ACS OMEGA 2019; 4:15829-15841. [PMID: 31592453 PMCID: PMC6777008 DOI: 10.1021/acsomega.9b01543] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 08/09/2019] [Indexed: 06/07/2023]
Abstract
Noscapine (NOS) is efficient in inhibiting cellular proliferation and induces apoptosis in nonsmall cell, lung, breast, lymphatic, and prostate cancers. The micelle-assisted drug delivery is a well-known phenomenon; however, the proper mechanism is still unclear. Therefore, in the present study, we have shown a mechanistic approach for the delivery of NOS from sodium dodecyl sulfate (SDS) micelles to calf thymus deoxyribose nucleic acid (ctDNA) base-pairs using various spectroscopic techniques. The absorption and emission spectroscopy results revealed that NOS interacts with the SDS micelle and resides in its hydrophobic core. Further, the intercalation of NOS from SDS micelles to ctDNA was also shown by these techniques. The anisotropy and quenching results further confirmed the relocation of NOS from SDS micelles to ctDNA. The CD analysis suggested that SDS micelles do not perturb the structure of ctDNA, which supported that SDS micelles can be used as a safe delivery vehicle for NOS. This work may be helpful for the invention of advanced micelle-based vehicles for the delivery of an anticancer drug to their specific target site.
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Affiliation(s)
- Neha Maurya
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | | | - Rajan Patel
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
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7
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Sett R, Paul BK, Guchhait N. Unsaturation of the phospholipid side-chain influences its interaction with cyclodextrins: A spectroscopic exploration using a phenazinium dye. Colloids Surf B Biointerfaces 2019; 180:150-158. [DOI: 10.1016/j.colsurfb.2019.04.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 04/19/2019] [Accepted: 04/20/2019] [Indexed: 11/30/2022]
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8
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Kundu P, Das S, Chattopadhyay N. Managing efficacy and toxicity of drugs: Targeted delivery and excretion. Int J Pharm 2019; 565:378-390. [DOI: 10.1016/j.ijpharm.2019.04.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 01/03/2023]
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9
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Sun Q, Gan N, Zhang S, Zhao L, Tang P, Pu H, Zhai Y, Gan R, Li H. Insights into protein recognition for γ-lactone essences and the effect of side chains on interaction via microscopic, spectroscopic, and simulative technologies. Food Chem 2019; 278:127-135. [DOI: 10.1016/j.foodchem.2018.11.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 11/02/2018] [Accepted: 11/06/2018] [Indexed: 12/27/2022]
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10
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Zhou Z, Hu X, Zhang G, Wang R, Gong D. Exploring the binding interaction of Maillard reaction by-product 5-hydroxymethyl-2-furaldehyde with calf thymus DNA. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:3192-3202. [PMID: 30548611 DOI: 10.1002/jsfa.9536] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/29/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND 5-Hydroxymethyl-2-furaldehyde (5-HMF), a by-product of the Maillard reaction, usually present in fried and baked food, may cause potential harm to the human body. Here, the interaction between 5-HMF and calf thymus DNA (ctDNA) under physiological buffer (pH 7.4) was studied using multi-spectroscopic methods combined with multivariate curve resolution-alternating least squares (MCR-ALS) chemometrics and molecular simulation techniques. RESULTS The concentration profiles and pure spectra of the three components (5-HMF, ctDNA and 5-HMF-ctDNA complex) were extracted from highly overlapping spectra using MCR-ALS analysis, which verified the formation of 5-HMF-ctDNA complex. The binding constant being of the order of 103 L mol-1 at four temperatures (292, 298, 304 and 310 K) indicated a weak affinity in the binding of 5-HMF to ctDNA. The binding interaction was mainly driven by hydrogen bonds and van der Waals forces. Viscosity analysis, melting assay, ionic strength effect and competitive fluorescence studies ascertained that 5-HMF bound to ctDNA through groove binding, and it tended to bind to guanine-cytosine rich region of ctDNA which was characterized using Fourier transform infrared spectra and molecular docking. Circular dichroism spectral analysis and DNA cleavage assays indicated that the ctDNA conformation was altered from B to A form and 5-HMF caused DNA damage at higher concentration. CONCLUSIONS The results suggested that 5-HMF bound to ctDNA through groove binding and caused DNA damage. This research may contribute to understand the binding mechanism of 5-HMF to ctDNA and to the assessment of the toxicological effect of 5-HMF in biological processes. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Zhisheng Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Xing Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Rui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Deming Gong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Department of Biomedicine, New Zealand Institute of Natural Medicine Research, Auckland, New Zealand
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11
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Kundu P, Chattopadhyay N. Exogenous delivery of a pyrazole based bioactive probe to natural DNA through non-ionic TX-165 micellar carrier. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Kundu P, Chattopadhyay N. Unraveling the binding interaction of a bioactive pyrazole-based probe with serum proteins: Relative concentration dependent 1:1 and 2:1 probe-protein stoichiometries. Biophys Chem 2018; 240:70-81. [DOI: 10.1016/j.bpc.2018.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/31/2018] [Accepted: 06/02/2018] [Indexed: 11/17/2022]
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13
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Kundu P, Chattopadhyay N. Photophysics of Anthril in Fluids and Glassy Matrixes. J Phys Chem A 2018; 122:5545-5554. [DOI: 10.1021/acs.jpca.8b00988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pronab Kundu
- Department of Chemistry, Jadavpur University, Kolkata - 700 032, India
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14
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Miksa B, Sierant M, Skorupska E, Michalski A, Kazmierski S, Steinke U, Rozanski A, Uznanski P. Chlorambucil labelled with the phenosafranin scaffold as a new chemotherapeutic for imaging and cancer treatment. Colloids Surf B Biointerfaces 2017; 159:820-828. [DOI: 10.1016/j.colsurfb.2017.08.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 08/02/2017] [Accepted: 08/23/2017] [Indexed: 12/31/2022]
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15
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Kundu P, Chattopadhyay N. Interaction of a bioactive pyrazole derivative with calf thymus DNA: Deciphering the mode of binding by multi-spectroscopic and molecular docking investigations. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:485-492. [DOI: 10.1016/j.jphotobiol.2017.06.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 11/16/2022]
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16
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Afzal M, Kundu P, Das S, Ghosh S, Chattopadhyay N. A promising strategy for improved solubilization of ionic drugs simply by electrostatic pushing. RSC Adv 2017. [DOI: 10.1039/c7ra08056e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Addition of soluble salts to the SDS-bound phenosafranin induces electrostatic pushing of the probe within the micellar interior from its initial location at the micelle–water interface.
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Affiliation(s)
- Mohd Afzal
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Sinjan Das
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
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17
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Yang H, Tang P, Tang B, Huang Y, Xiong X, Li H. Novel poly(ADP-ribose) polymerase inhibitor veliparib: biophysical studies on its binding to calf thymus DNA. RSC Adv 2017. [DOI: 10.1039/c6ra28213j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Veliparib, an new anticancer drug in the class of poly (ADP-ribose) polymerase inhibitors, intercalates partially and binds to ctDNA and induces moderate conformational perturbation of the DNA.
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Affiliation(s)
- Hongqin Yang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Peixiao Tang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Bin Tang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Yanmei Huang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Xinnuo Xiong
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Hui Li
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
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18
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Pawar SK, Punith R, Naik RS, Seetharamappa J. Spectroscopic and molecular modeling approaches to investigate the binding of proton pump inhibitors to human serum albumin. J Biomol Struct Dyn 2016; 35:3205-3220. [DOI: 10.1080/07391102.2016.1251337] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Suma K. Pawar
- Department of Chemistry, Karnatak University, Dharwad 580003, India
| | - Reeta Punith
- Department of Chemistry, Karnatak University, Dharwad 580003, India
| | - Roopa S. Naik
- Department of Chemistry, Karnatak University, Dharwad 580003, India
| | - J. Seetharamappa
- Department of Chemistry, Karnatak University, Dharwad 580003, India
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19
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Afzal M, Ghosh S, Das S, Chattopadhyay N. Endogenous Activation-Induced Delivery of a Bioactive Photosensitizer from a Micellar Carrier to Natural DNA. J Phys Chem B 2016; 120:11492-11501. [DOI: 10.1021/acs.jpcb.6b08283] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mohd Afzal
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Saptarshi Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sinjan Das
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
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Relocation of a biological photosensitizer from non-ionic micellar carrier to DNA: A multispectroscopic investigation. Biophys Chem 2016; 219:75-81. [PMID: 27794262 DOI: 10.1016/j.bpc.2016.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 12/24/2022]
Abstract
Relocation of a bioactive photosensitizer, namely phenosafranin (PSF), from the phenazinium family, has been demonstrated from non-ionic micellar carrier to the DNA. For the purpose, interaction of micelle-bound PSF with calf thymus DNA (ctDNA) has been investigated vividly exploiting various spectroscopic techniques like absorption, steady state and time resolved emission, fluorescence anisotropy, circular dichroism etc. Experimental outcomes reveal that PSF binds strongly with both the micelle as well as the DNA. In the presence of DNA, however, relocation of the micelle-carried PSF occurs from the micelle to the DNA. Competitive binding of the probe between micelle and the DNA is assigned responsible for this relocation. Circular dichroism spectral measurements reflect that the DNA conformation remains intact in the presence of the micelle advocating that the non-ionic micelles can safely be used for the drug delivery purpose. The work is expected to encourage development of newer carriers for DNA targeted drug delivery.
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