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Song J, George C, Donaldson DJ. Spontaneous Production of I 2 at the Surface of Aqueous Iodide Solutions. J Phys Chem A 2024; 128:6739-6744. [PMID: 39092462 PMCID: PMC11332398 DOI: 10.1021/acs.jpca.4c03010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/24/2024] [Accepted: 07/26/2024] [Indexed: 08/04/2024]
Abstract
Several groups have recently reported spontaneous production of atmospherically reactive species, including molecular iodine (I2) at the air-water interface of droplets. In this study, glancing angle laser-induced fluorescence spectroscopy was used to track the luminol fluorescence at the surface of sodium iodide (NaI) and sodium chloride (NaCl) solutions. Although luminol fluorescence is hardly quenched by halide anions, even up to fairly high concentrations, it is effectively quenched by I2. We observe luminol fluorescence quenching at the surface of NaI solutions but not at the surface of NaCl solutions, pointing to the formation of I2 at the surface of NaI solutions. This provides further support for the proposal that the strong electric field or the reduction solvation present at the air-water interface can initiate spontaneous iodide activation and other chemistry there. The spontaneous production of I2 at the surface of aqueous iodide solutions presents a previously unconsidered source of iodine in the atmosphere.
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Affiliation(s)
- Junwei Song
- Université
Claude Bernard Lyon 1, CNRS, IRCELYON, UMR 5256, Villeurbanne F-69100, France
| | - Christian George
- Université
Claude Bernard Lyon 1, CNRS, IRCELYON, UMR 5256, Villeurbanne F-69100, France
| | - D. James Donaldson
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Department
of Physical and Environmental Sciences, University of Toronto, Scarborough, Toronto, Ontario M1C 1A4, Canada
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2
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Akbari Nakhjavani S, Khalilzadeh B, Afsharan H, Hosseini N, Ghahremani MH, Carrara S, Tasoglu S, Omidi Y. Electrochemiluminescent immunosensor for detection of carcinoembryonic antigen using luminol-coated silver nanoparticles. Mikrochim Acta 2023; 190:77. [PMID: 36715890 DOI: 10.1007/s00604-023-05656-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 01/09/2023] [Indexed: 01/31/2023]
Abstract
Recently, electrochemiluminescent (ECL) immunosensors have received much attention in the field of biomarker detection. Here, a highly enhanced ECL immunosensing platform was designed for ultrasensitive detection of carcinoembryonic antigen (CEA). The surface of the glassy carbon electrode was enhanced by applying functional nanostructures such as thiolated graphene oxide (S-GO) and streptavidin-coated gold nanoparticles (SA-AuNPs). The selectivity and sensitivity of the designed immunosensor were improved by entrapping CEA biomolecules using a sandwich approach. Luminol/silver nanoparticles (Lu-SNPs) were applied as the main core of the signaling probe, which were then coated with streptavidin to provide overloading of the secondary antibody. The highly ECL signal enhancement was obtained due to the presence of horseradish peroxidase (HRP) in the signaling probe, in which the presence of H2O2 further amplified the intensity of the signals. The engineered immunosensor presented excellent sensitivity for CEA detection, with limit of detection (LOD) and linear detection range (LDR) values of 58 fg mL-1 and 0.1 pg mL-1 to 5 pg mL-1 (R2 = 0.9944), respectively. Besides its sensitivity, the fabricated ECL immunosensor presented outstanding selectivity for the detection of CEA in the presence of various similar agents. Additionally, the developed immunosensor showed an appropriate repeatability (RSD 3.8%) and proper stability (2 weeks). Having indicated a robust performance in the real human serum with stated LOD and LDR, the engineered immunosensor can be considered for the detection and monitoring of CEA in the clinic.
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Affiliation(s)
- Sattar Akbari Nakhjavani
- Mechanical Engineering Department, School of Engineering, Koç University, Istanbul, Turkey, 34450.
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
- Koç University Translational Medicine Research Center (KUTTAM), Koç University, Istanbul, Turkey, 34450.
| | - Balal Khalilzadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Afsharan
- Optical+Biomedical Engineering Laboratory, Department of Electrical, Electronic and Computer Engineering, University of Western Australia, Perth, WA, 6009, Australia
| | - Nashmin Hosseini
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Pharmacy, Department of Pharmaceutics, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Hossein Ghahremani
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Faculty of Pharmacy, Department of Pharmacology-Toxicology, Tehran University of Medical Sciences, Tehran, Iran
| | - Sandro Carrara
- Integrated Circuit Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Savas Tasoglu
- Mechanical Engineering Department, School of Engineering, Koç University, Istanbul, Turkey, 34450.
- Koç University Translational Medicine Research Center (KUTTAM), Koç University, Istanbul, Turkey, 34450.
| | - Yadollah Omidi
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, 33328, USA.
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Dutta Choudhury S, Pal H. Supramolecular and suprabiomolecular photochemistry: a perspective overview. Phys Chem Chem Phys 2021; 22:23433-23463. [PMID: 33112299 DOI: 10.1039/d0cp03981k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this perspective review article, we have attempted to bring out the important current trends of research in the areas of supramolecular and suprabiomolecular photochemistry. Since the spans of the subject areas are very vast, it is impossible to cover all the aspects within the limited space of this review article. Nevertheless, efforts have been made to assimilate the basic understanding of how supramolecular interactions can significantly change the photophysical and other related physiochemical properties of chromophoric dyes and drugs, which have enormous academic and practical implications. We have discussed with reference to relevant chemical systems where supramolecularly assisted modulations in the properties of chromophoric dyes and drugs can be used or have already been used in different areas like sensing, dye/drug stabilization, drug delivery, functional materials, and aqueous dye laser systems. In supramolecular assemblies, along with their conventional photophysical properties, the acid-base properties of prototropic dyes, as well as the excited state prototautomerization and related proton transfer behavior of proton donor/acceptor dye molecules, are also largely modulated due to supramolecular interactions, which are often reflected very explicitly through changes in their absorption and fluorescence characteristics, providing us many useful insights into these chemical systems and bringing out intriguing applications of such changes in different applied areas. Another interesting research area in supramolecular photochemistry is the excitation energy transfer from the donor to acceptor moieties in self-assembled systems which have immense importance in light harvesting applications, mimicking natural photosynthetic systems. In this review article, we have discussed varieties of these aspects, highlighting their academic and applied implications. We have tried to emphasize the progress made so far and thus to bring out future research perspectives in the subject areas concerned, which are anticipated to find many useful applications in areas like sensors, catalysis, electronic devices, pharmaceuticals, drug formulations, nanomedicine, light harvesting, and smart materials.
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Affiliation(s)
- Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India. and Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India
| | - Haridas Pal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
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Sung HL, Nesbitt DJ. Single-Molecule FRET Kinetics of the Mn 2+ Riboswitch: Evidence for Allosteric Mg 2+ Control of "Induced-Fit" vs "Conformational Selection" Folding Pathways. J Phys Chem B 2019; 123:2005-2015. [PMID: 30739441 DOI: 10.1021/acs.jpcb.8b11841] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Gene expression in bacteria is often regulated dynamically by conformational changes in a riboswitch upon ligand binding, a detailed understanding of which is very much in its infancy. For example, the manganese riboswitch is a widespread RNA motif that conformationally responds in regulating bacterial gene expression to micromolar levels of its eponymous ligand, Mn2+, but the mechanistic pathways are poorly understood. In this work, we quantitatively explore the dynamic folding behavior of the manganese riboswitch by single-molecule fluorescence resonance energy transfer spectroscopy as a function of cation/ligand conditions. From the detailed analysis of the kinetics, the Mn2+ is shown to fold the riboswitch by a "bind-then-fold" (i.e., "induced-fit", IF) mechanism, whereby the ligand binds first and then promotes folding. On the other hand, the data also clearly reveal the presence of a folded yet ligand-free structure predominating due to the addition of physiological Mg2+ to a nonselective metal ion binding site. Of particular kinetic interest, such a Mg2+ "prefolded" conformation of the riboswitch is shown to exhibit a significantly increased affinity for Mn2+ and further stabilization by subsequent binding of the ligand, thereby promoting efficient riboswitch folding by a "fold-then-bind" (i.e., "conformational selection", CS) mechanism. Our results not only demonstrate Mg2+-controlled switching between IF and CS riboswitch folding pathways but also suggest a novel heterotropic allosteric control in the manganese riboswitch activity co-regulated by Mg2+ binding.
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Islam MM, Barik S, Sarkar M. Probing the Interactions of 1-Alkyl-3-methylimidazolium Tetrafluoroborate (Alkyl = Octyl, Hexyl, Butyl, and Ethyl) Ionic Liquids with Bovine Serum Albumin: An Alkyl Chain Length-Dependent Study. J Phys Chem B 2019; 123:1512-1526. [DOI: 10.1021/acs.jpcb.8b10795] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mullah Muhaiminul Islam
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
| | - Sahadev Barik
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur,
Jatni, Khurda 752050, Odisha, India
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Sonu VK, Mitra S. Quenching of Luminol Fluorescence at Nano-Bio Interface: Towards the Development of an Efficient Energy Transfer System. J Fluoresc 2018; 29:165-176. [PMID: 30519975 DOI: 10.1007/s10895-018-2324-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/05/2018] [Indexed: 10/27/2022]
Abstract
Surface modified colloidal gold (Au) and silver (Ag) nanoparticles (NPs) were used as efficient quenchers of luminol (LH2) fluorescence either in homogeneous aqueous medium or its noncovalent assembly with bovine serum albumin (BSA). The mechanism as well as the extent of fluorescence quenching was found to be strongly dependent on the nature of the nanoparticles. While simple static type fluorescence quenching mechanism was perceived with AuNP, a more complex protocol involving quenching sphere model was envisaged for AgNP quenching. Nevertheless, the magnitude of Stern-Volmer (SV) quenching constant (KSV ~ 108-1010 M-1) was calculated to be ca. 104 times more for surface quoted NPs in comparison with BSA-NP bioconjugates system. On the other hand, a highly efficient (E ≈ 95%) energy transfer (ET) process was predicted for LH2 captured in the hydrophobic assembly with BSA in presence of AgNP as an acceptor. The ET efficiency is critically dependent on the concentration of BSA and nicely correlated with the extent of NP surface coverage. However, fluorescence quenching on AuNP surface is relatively less responsive towards protein concentration, primarily due to the difference in surface activity as well as the mode of interaction of the protein with NPs. Graphical Abstract Energy transfer from excited luminol to metal nanoparticles is strongly modulated in presence of serum albumins.
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Affiliation(s)
- Vikash Kumar Sonu
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Sivaprasad Mitra
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong, 793022, India.
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Pilania M, Rohman MA, Arun V, Mehra MK, Mitra S, Kumar D. An efficient synthesis of triazolium ion based NHC precursors using diaryliodonium salts and their photophysical properties. Org Biomol Chem 2018; 16:7340-7345. [PMID: 30270383 DOI: 10.1039/c8ob01818a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Copper-catalysed N-arylation of fused triazoles using diaryliodonium salts as an aryl source is described. This scalable protocol displayed good compatibility towards diverse sensitive functional groups like ester, alkyl and nitro groups and halogens (F, Cl, Br). The synthetic usefulness of the prepared triazolium salts was proved by preparing α-hydroxyketone through benzoin condensation. Photophysical studies of these compounds showed promising Stokes-shifted fluorescence emission in aqueous medium, so this molecular framework could be a proficient probe for biological applications.
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Affiliation(s)
- Meenakshi Pilania
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-333031, Rajasthan, India.
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9
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Sonu VK, Rajkumar I, Bhattacharjee K, Joshi S, Mitra S. Interaction of caffeine and sulfadiazine with lysozyme adsorbed at colloidal metal nanoparticle interface: influence on drug transport ability and antibacterial activity. J Biomol Struct Dyn 2018; 37:321-335. [DOI: 10.1080/07391102.2018.1426497] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Vikash K. Sonu
- Centre for Advanced Studies in Chemistry North-Eastern Hill University, Shillong, 793 022, India
| | - Imocha Rajkumar
- Centre for Advanced Studies in Chemistry North-Eastern Hill University, Shillong, 793 022, India
| | - Kaushik Bhattacharjee
- Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, 793 022, India
| | - S.R. Joshi
- Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, 793 022, India
| | - Sivaprasad Mitra
- Centre for Advanced Studies in Chemistry North-Eastern Hill University, Shillong, 793 022, India
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10
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Islam MM, Rohman MA, Gurung AB, Bhattacharjee A, Aguan K, Mitra S. Correlation of cholinergic drug induced quenching of acetylcholinesterase bound thioflavin-T fluorescence with their inhibition activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:250-257. [PMID: 28822269 DOI: 10.1016/j.saa.2017.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/17/2017] [Accepted: 08/02/2017] [Indexed: 06/07/2023]
Abstract
The development of new acetylcholinesterase inhibitors (AChEIs) and subsequent assay of their inhibition efficiency is considered to be a key step for AD treatment. The fluorescence intensity of thioflavin-T (ThT) bound in the active site of acetylcholinesterase (AChE) quenches substantially in presence of standard AChEI drugs due to the dynamic replacement of the fluorophore from the AChE active site as confirmed from steady state emission as well as time-resolved fluorescence anisotropy measurement and molecular dynamics simulation in conjunction with docking calculation. The parametrized % quenching data for individual system shows excellent correlation with enzyme inhibition activity measured independently by standard Ellman AChE assay method in a high throughput plate reader system. The results are encouraging towards design of a fluorescence intensity based AChE inhibition assay method and may provide a better toolset to rapidly evaluate as well as develop newer AChE-inhibitors for AD treatment.
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Affiliation(s)
- Mullah Muhaiminul Islam
- Center for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Mostofa Ataur Rohman
- Center for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Arun Bahadur Gurung
- Department of Biotechnology & Bio-informatics, North-Eastern Hill University, Shillong 793 022, India
| | - Atanu Bhattacharjee
- Department of Biotechnology & Bio-informatics, North-Eastern Hill University, Shillong 793 022, India
| | - Kripamoy Aguan
- Department of Biotechnology & Bio-informatics, North-Eastern Hill University, Shillong 793 022, India
| | - Sivaprasad Mitra
- Center for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong 793 022, India.
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11
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Sonu VK, Islam MM, Gurung AB, Bhattacharjee A, Mitra S. Serum albumin interaction with xanthine drugs at nano-bio interfaces: A combined multi-spectroscopic and molecular modelling approach. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.084] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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12
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Islam MM, Mitra S. Cholinergic inhibitors replace thioflavin-T from acetylcholinesterase binding pocket: A potential fluorescence based molecular switch. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.079] [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]
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13
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Sonu VK, Islam MM, Rohman MA, Mitra S. Lysozyme binding ability toward psychoactive stimulant drugs: Modulatory effect of colloidal metal nanoparticles. Colloids Surf B Biointerfaces 2016; 146:514-22. [DOI: 10.1016/j.colsurfb.2016.06.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/27/2016] [Accepted: 06/28/2016] [Indexed: 11/26/2022]
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14
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Modulation of ESIPT fluorescence in o-hydroxy acetophenone derivatives: A comparative study in different bio-mimicking aqueous interfaces. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Sayed M, Shinde K, Shah R, Pal H. pH-Responsive Indicator Displacement Assay of Acetylcholine Based on Acridine-p-Sulfonatocalix[4]arene Supramolecular System: Fluorescence Off/On Switching and Reversible pKaShift. ChemistrySelect 2016. [DOI: 10.1002/slct.201600226] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Ketaki Shinde
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Ramesh Shah
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Haridas Pal
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
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16
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Islam MM, Sonu VK, Gashnga PM, Moyon NS, Mitra S. Caffeine and sulfadiazine interact differently with human serum albumin: A combined fluorescence and molecular docking study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 152:23-33. [PMID: 26186394 DOI: 10.1016/j.saa.2015.07.051] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/07/2015] [Accepted: 07/08/2015] [Indexed: 06/04/2023]
Abstract
The interaction and binding behavior of the well-known drug sulfadiazine (SDZ) and psychoactive stimulant caffeine (CAF) with human serum albumin (HSA) was monitored by in vitro fluorescence titration and molecular docking calculations under physiological condition. The quenching of protein fluorescence on addition of CAF is due to the formation of protein-drug complex in the ground state; whereas in case of SDZ, the experimental results were explained on the basis of sphere of action model. Although both these compounds bind preferentially in Sudlow's site 1 of the protein, the association constant is approximately two fold higher in case of SDZ (∼4.0×10(4)M(-1)) in comparison with CAF (∼9.3×10(2)M(-1)) and correlates well with physico-chemical properties like pKa and lipophilicity of the drugs. Temperature dependent fluorescence study reveals that both SDZ and CAF bind spontaneously with HSA. However, the binding of SDZ with the protein is mainly governed by the hydrophobic forces in contrast with that of CAF; where, the interaction is best explained in terms of electrostatic mechanism. Molecular docking calculation predicts the binding of these drugs in different location of sub-domain IIA in the protein structure.
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Affiliation(s)
- Mullah Muhaiminul Islam
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Vikash K Sonu
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Pynsakhiat Miki Gashnga
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - N Shaemningwar Moyon
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Sivaprasad Mitra
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India.
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Sayed M, Sundararajan M, Mohanty J, Bhasikuttan AC, Pal H. Photophysical and Quantum Chemical Studies on the Interactions of Oxazine-1 Dye with Cucurbituril Macrocycles. J Phys Chem B 2015; 119:3046-57. [DOI: 10.1021/jp509243j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Mahesh Sundararajan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Jyotirmayee Mohanty
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Achikanath C. Bhasikuttan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Haridas Pal
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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18
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Bihani M, Bora PP, Bez G, Askari H. A green four-component synthesis of zwitterionic alkyl/benzyl pyrazolyl barbiturates and their photophysical studies. Mol Divers 2014; 18:745-57. [PMID: 25005075 DOI: 10.1007/s11030-014-9532-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 06/14/2014] [Indexed: 12/17/2022]
Abstract
A novel series of unsymmetrically substituted alkyl/benzyl pyrazolyl barbiturates incorporating highly biologically active pyrazolone and barbiturate moieties was synthesized by four-component reactions of a mixture of ethyl acetoacetate, hydrazine hydrate, aldehydes and barbituric acid/thiobarbituric acid in ethanol without using a catalyst. The photophysical properties of the newly designed alkyl/benzyl pyrazolyl barbiturates were studied, and good quantum yield of some products indicated a definitive scope in the field of biochemical applications. Single-crystal X-ray crystallographic studies revealed that the newly synthesized compounds exist in zwitterionic form. The zwitterionic nature of the new chimera makes them interesting candidates for drug delivery as zwitterionic drugs are known to have highly water soluble properties, specific protein absorption, slow recognition by immune system, slow blood clearance from body and can constantly diffuse and deposit throughout the physiological pH.
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Affiliation(s)
- Manisha Bihani
- Department of Chemistry, North Eastern Hill University, Shillong, 793022, India
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Interaction of Sulfadiazine with Model Water Soluble Proteins: A Combined Fluorescence Spectroscopic and Molecular Modeling Approach. J Fluoresc 2013; 24:579-88. [DOI: 10.1007/s10895-013-1330-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/20/2013] [Indexed: 10/26/2022]
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20
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Fluorescence modulation and associative behavior of lumazine in hydrophobic domain of micelles and bovine serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 121:37-45. [DOI: 10.1016/j.jphotobiol.2013.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 02/13/2013] [Accepted: 02/13/2013] [Indexed: 11/21/2022]
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21
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On the Fluorescence of Luminol in a Silver Nanoparticles Complex. J Fluoresc 2013; 23:569-74. [DOI: 10.1007/s10895-013-1204-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 02/24/2013] [Indexed: 10/27/2022]
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22
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Basu Baul TS, Kundu S, Mitra S, Höpfl H, Tiekink ERT, Linden A. The influence of counter ion and ligandmethyl substitution on the solid-state structures and photophysical properties of mercury(ii) complexes with (E)-N-(pyridin-2-ylmethylidene)arylamines. Dalton Trans 2013; 42:1905-20. [DOI: 10.1039/c2dt32283h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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