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Jalan A, Sangeet S, Pradhan AK, Moyon NS. Exploring the interaction of a potent anti-cancer drug Selumetinib with bovine serum albumin: Spectral and computational attributes. J Mol Recognit 2024; 37:e3084. [PMID: 38596890 DOI: 10.1002/jmr.3084] [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: 08/09/2023] [Revised: 03/05/2024] [Accepted: 03/22/2024] [Indexed: 04/11/2024]
Abstract
The binding of drugs to plasma proteins determines its fate within the physiological system, hence profound understanding of its interaction within the bloodstream is important to understand its pharmacodynamics and pharmacokinetics and thereby its therapeutic potential. In this regard, our work delineates the mechanism of interaction of Selumetinib (SEL), a potent anti-cancer drug showing excellent effect against multiple solid tumors, with plasma protein bovine serum albumin (BSA), using methods such as absorption, steady-state fluorescence, time-resolved, fluorescence resonance energy transfer, Fourier transform infrared spectra (FTIR), circular dichroism (CD), synchronous and 3D-fluorescence, salt fluorescence, molecular docking and molecular dynamic simulations. The BSA fluorescence intensity was quenched with increasing concentration of SEL which indicates interactions of SEL with BSA. Stern-Volmer quenching analysis and lifetime studies indicate the involvement of dynamic quenching. However, some contributions from the static quenching mechanism could not be ruled out unambiguously. The association constant was found to be 5.34 × 105 M-1 and it has a single binding site. The Förster distance (r) indicated probable energy transmission between the BSA and SEL. The positive entropy changes and enthalpy change indicate that the main interacting forces are hydrophobic forces, also evidenced by the results of molecular modeling studies. Conformation change in protein framework was revealed from FTIR, synchronous and 3D fluorescence and CD studies. Competitive binding experiments as well as docking studies suggest that SEL attaches itself to site I (subdomain IIA) of BSA where warfarin binds. Molecular dynamic simulations indicate the stability of the SEL-BSA complex. The association energy between BSA and SEL is affected in the presence of different metals differently.
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Affiliation(s)
- Ankita Jalan
- Department of Chemistry, National Institute of Technology Silchar, Silchar, India
| | - Satyam Sangeet
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Amit Kumar Pradhan
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - N Shaemningwar Moyon
- Department of Chemistry, National Institute of Technology Silchar, Silchar, India
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Montiel Schneider MG, Martín MJ, Cuello N, Favatela MF, Gentili C, Elias V, Eimer G, Lassalle V. Morin loaded mesoporous molecular sieves as novel devices to the potential treatment of tumor pathologies. J Biomater Appl 2024; 38:1000-1009. [PMID: 38456269 DOI: 10.1177/08853282241238408] [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] [Indexed: 03/09/2024]
Abstract
Morin is an antioxidant and anticancer flavonoid, extracted from natural sources, that may exert beneficial effects for several pathologies. Despite this, the administration of morin represents a challenge due to its low aqueous solubility. Mesoporous silica materials have emerged as biocompatible tools for drug delivery, as their pore size can be modulated for maximum surface area to volume ratio. In this contribution, we evaluate the ability of iron-modified mesoporous materials, for morin loading and controlled delivery. The SBA-15 and MCM-41 sieves were synthesized and modified with iron (metal content 4.02 and 6.27 % wt, respectivily). Characterization by transmission electron microscopy, XRD and UV-Vis revealed adequate pore size and agglomerates of very small metallic nanospecies (nanoclusters), without larger iron oxide nanoparticles. FT-IR spectra confirmed the presence of silanol groups in the solid hosts, which can interact with different groups present in morin molecules. SBA-15 materials were more efficient in terms of morin loading capacity (LC) due to their larger pore diameter. LC was more than 35% for SBA-15 materials when adsorptions studies were carried out with 9 mg of drug. Antioxidant activity were assayed by using DPPH test. Free iron materials presented a significate improvement as antioxidants after morin incorporation, reaching a scavenging activity of almost a 90%. On the other hand, in iron modified mesoporous materials, the presence of morin did not affect the scavenging activity. The results could be related with the formation of a complex between the flavonoid and the iron. Finally, biosafety studies using normal epithelial cells revealed that neither the loaded nor the unloaded materials exerted toxicity, even at doses of 1 mg/ml. These findings expand knowledge about mesoporous materials as suitable carriers of flavonoids with the aim of improving therapies for a wide range of pathologies.
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Affiliation(s)
| | - María Julia Martín
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
- INBIOSUR, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Natalia Cuello
- Centro de Investigacion y Tecnología Química (CITeQ) (UTN-CONICET), Facultad Regional Cordoba, Maestro Lopez y Cruz Roja Argentina, Ciudad Universitaria, Córdoba, Argentina
| | - María Florencia Favatela
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Claudia Gentili
- INBIOSUR, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Verónica Elias
- Centro de Investigacion y Tecnología Química (CITeQ) (UTN-CONICET), Facultad Regional Cordoba, Maestro Lopez y Cruz Roja Argentina, Ciudad Universitaria, Córdoba, Argentina
| | - Griselda Eimer
- Centro de Investigacion y Tecnología Química (CITeQ) (UTN-CONICET), Facultad Regional Cordoba, Maestro Lopez y Cruz Roja Argentina, Ciudad Universitaria, Córdoba, Argentina
| | - Verónica Lassalle
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
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Taniguchi M, LaRocca CA, Bernat JD, Lindsey JS. Digital Database of Absorption Spectra of Diverse Flavonoids Enables Structural Comparisons and Quantitative Evaluations. JOURNAL OF NATURAL PRODUCTS 2023; 86:1087-1119. [PMID: 36848595 DOI: 10.1021/acs.jnatprod.2c00720] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Flavonoids play diverse roles in plants, comprise a non-negligible fraction of net primary photosynthetic production, and impart beneficial effects in human health from a plant-based diet. Absorption spectroscopy is an essential tool for quantitation of flavonoids isolated from complex plant extracts. The absorption spectra of flavonoids typically consist of two major bands, band I (300-380 nm) and band II (240-295 nm), where the former engenders a yellow color; in some flavonoids the absorption tails to 400-450 nm. The absorption spectra of 177 flavonoids and analogues of natural or synthetic origin have been assembled, including molar absorption coefficients (109 from the literature, 68 measured here). The spectral data are in digital form and can be viewed and accessed at http://www.photochemcad.com. The database enables comparison of the absorption spectral features of 12 distinct types of flavonoids including flavan-3-ols (e.g., catechin, epigallocatechin), flavanones (e.g., hesperidin, naringin), 3-hydroxyflavanones (e.g., taxifolin, silybin), isoflavones (e.g., daidzein, genistein), flavones (e.g., diosmin, luteolin), and flavonols (e.g., fisetin, myricetin). The structural features that give rise to shifts in wavelength and intensity are delineated. The availability of digital absorption spectra for diverse flavonoids facilitates analysis and quantitation of these valuable plant secondary metabolites. Four examples are provided of calculations─multicomponent analysis, solar ultraviolet photoprotection, sun protection factor (SPF), and Förster resonance energy transfer (FRET)─for which the spectra and accompanying molar absorption coefficients are sine qua non.
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Affiliation(s)
- Masahiko Taniguchi
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Connor A LaRocca
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Jake D Bernat
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Jonathan S Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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Li Y, Zhao Z, Nai X, Li M, Kong J, Chen Y, Liu M, Zhang Q, Liu J, Yan H. Effects of Temperature, Metal Ions and Biosurfactants on Interaction Mechanism between Caffeic Acid Phenethyl Ester and Hemoglobin. Molecules 2023; 28:molecules28083440. [PMID: 37110675 PMCID: PMC10144779 DOI: 10.3390/molecules28083440] [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: 02/21/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Caffeic acid phenylethyl ester (CAPE) is a natural polyphenol extracted from propolis, which is reported to have several pharmacological effects such as antibacterial, antitumor, antioxidant and anti-inflammatory activities. Hemoglobin (Hb) is closely related to the transport of drugs, and some drugs, including CAPE, can lead to a change in Hb concentration. Herein, the effects of temperature, metal ions and biosurfactants on the interaction between CAPE and Hb were studied using ultraviolet-visible spectroscopy (UV-Vis), fluorescence spectroscopy, circular dichroism (CD), dynamic light scattering (DLS) and molecular docking analysis. The results showed that the addition of CAPE led to changes in the microenvironment of Hb amino acid residues as well as the secondary structure of Hb. Hydrogen bonding and van der Waals force were found to be the main driving forces for the interaction between CAPE and Hb through fluorescence spectroscopy and thermodynamic parameter data. The results of fluorescence spectroscopy also showed that lowering the temperature, adding biosurfactants (sodium cholate (NaC) and sodium deoxycholate (NaDC)) and the presence of Cu2+ increased the binding force between CAPE and Hb. These results provide useful data for the targeted delivery and absorption of CAPE and other drugs.
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Affiliation(s)
- Yutong Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Zhen Zhao
- College of Pharmacy, Liaocheng University, Liaocheng 252059, China
| | - Xiao Nai
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Mingyuan Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Jing Kong
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Yanrong Chen
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Min Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Qian Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Jie Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Hui Yan
- College of Pharmacy, Liaocheng University, Liaocheng 252059, China
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Tan C, Xu QD, Chen N, He Q, Zeng WC. Cross-Linking Modifications of Different Phenolic Compounds on Myofibrillar Protein of Common Carp. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-022-02958-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Tan C, Xu QD, Chen N, He Q, Sun Q, Zeng WC. Cross-linking effects of EGCG on myofibrillar protein from common carp (Cyprinus carpio) and the action mechanism. J Food Biochem 2022; 46:e14416. [PMID: 36106705 DOI: 10.1111/jfbc.14416] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/29/2022] [Accepted: 08/17/2022] [Indexed: 01/13/2023]
Abstract
The cross-linking effects and action mechanism of epigallocatechin gallate (EGCG) on myofibrillar protein from common carp (Cyprinus carpio) were investigated. According to particle size, zeta potential, and atomic force microscopy, EGCG could cause the aggregation of myofibrillar protein, while hydrogen bonds and electrostatic interactions were the main molecular forces. With the measurement of Fourier transform infrared spectrum, surface hydrophobicity, fluorescence spectrum, circular dichroism spectrum, and molecular dynamics simulation, EGCG could make the spatial configuration of myofibrillar protein loose, enhance the exposure of amino acid residues, and further change its secondary and tertiary structures by forming intermolecular and intramolecular hydrogen bonds with myofibrillar protein. In addition, the gel properties of myofibrillar protein were improved by EGCG. All results suggested that EGCG had the cross-linking effects on myofibrillar protein in carp meat and could further improve its properties, which showed the potential to improve the qualities of fish meat in food industry. PRACTICAL APPLICATIONS: Compared with other meat, fish meat is particularly easy to break and deteriorate during its processing and sales due to the short length and low cross-linking degree of fish myofibrillar protein, which shows some negative impacts on the quality of fish meat. In the present study, epigallocatechin gallate (EGCG) showed the significant cross-linking effects on carp myofibrillar protein and further improved its physicochemical properties. All results suggested that EGCG had the potential to increase the cross-linking degree of fish myofibrillar protein and improve its properties, so as to ameliorate the quality of fish meat during processing and storage.
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Affiliation(s)
- Chong Tan
- Antioxidant Polyphenols Team, Department of Food Engineering, Sichuan University, Chengdu, PR China
| | - Qian-Da Xu
- Antioxidant Polyphenols Team, Department of Food Engineering, Sichuan University, Chengdu, PR China
| | - Nan Chen
- Antioxidant Polyphenols Team, Department of Food Engineering, Sichuan University, Chengdu, PR China
| | - Qiang He
- The Key Laboratory of Food Science and Technology of Sichuan Province of Education, Sichuan University, Chengdu, PR China
| | - Qun Sun
- The Key Laboratory of Food Science and Technology of Sichuan Province of Education, Sichuan University, Chengdu, PR China
| | - Wei-Cai Zeng
- Antioxidant Polyphenols Team, Department of Food Engineering, Sichuan University, Chengdu, PR China.,The Key Laboratory of Food Science and Technology of Sichuan Province of Education, Sichuan University, Chengdu, PR China
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7
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Determination of protein-protein interactions at the single-molecule level using optical tweezers. Q Rev Biophys 2022; 55:e8. [PMID: 35946323 DOI: 10.1017/s0033583522000075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Biomolecular interactions are at the base of all physical processes within living organisms; the study of these interactions has led to the development of a plethora of different methods. Among these, single-molecule (in singulo) experiments have become relevant in recent years because these studies can give insight into mechanisms and interactions that are hidden for ensemble-based (in multiplo) methods. The focus of this review is on optical tweezer (OT) experiments, which can be used to apply and measure mechanical forces in molecular systems. OTs are based on optical trapping, where a laser is used to exert a force on a dielectric bead; and optically trap the bead at a controllable position in all three dimensions. Different experimental approaches have been developed to study protein–protein interactions using OTs, such as: (1) refolding and unfolding in trans interaction where one protein is tethered between the beads and the other protein is in the solution; (2) constant force in cis interaction where each protein is bound to a bead, and the tension is suddenly increased. The interaction may break after some time, giving information about the lifetime of the binding at that tension. And (3) force ramp in cis interaction where each protein is attached to a bead and a ramp force is applied until the interaction breaks. With these experiments, parameters such as kinetic constants (koff, kon), affinity values (KD), energy to the transition state ΔG≠, distance to the transition state Δx≠ can be obtained. These parameters characterize the energy landscape of the interaction. Some parameters such as distance to the transition state can only be obtained from force spectroscopy experiments such as those described here.
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8
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Chen Y, Nai X, Li M, Kong J, Hao S, Yan H, Liu M, Zhang Q, Liu J. A comprehensive research on Lactone Sophorolipid (LSL) and Soy Protein Isolate (SPI) interacting mixture. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Precupas A, Sandu R, Neculae AVF, Neacsu A, Popa VT. Calorimetric, spectroscopic and computational investigation of morin binding effect on bovine serum albumin stability. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115953] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Mondal A, Hazra A, Chakrabarty J, Bose K JC, Banerjee P. Tandem Detection of Sub-Nano Molar Level CN - and Hg 2+ in Aqueous Medium by a Suitable Molecular Sensor: A Viable Solution for Detection of CN - and Development of the RGB-Based Sensory Device. ACS OMEGA 2020; 5:6576-6587. [PMID: 32258893 PMCID: PMC7114731 DOI: 10.1021/acsomega.9b04311] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/09/2020] [Indexed: 05/04/2023]
Abstract
An inimitable urea-based multichannel chemosensor, DTPH [1,5-bis-(2,6-dichloro-4-(trifluoromethyl)phenyl)carbonohydrazide], was examined to be highly proficient to recognize CN- based on the H-bonding interaction between sensor -NH moiety and CN- in aqueous medium with explicit selectivity. In the absorption spectral titration of DTPH, a new peak at higher wavelength was emerged in titrimetric analytical studies of CN- with the zero-order reaction kinetics affirming the substantial sensor-analyte interaction. The isothermal titration calorimetry (ITC) experiment further affirmed that the sensing process was highly spontaneous with the Gibbs free energy of -26 × 104 cal/mol. The binding approach between DTPH and CN- was also validated by more than a few experimental studies by means of several spectroscopic tools along with the theoretical calculations. A very low detection limit of the chemosensor toward CN- (0.15 ppm) further instigated to design an RGB-based sensory device based on the colorimetric upshots of the chemosensor in order to develop a distinct perception regarding the presence of innocuous or precarious level of the CN- in a contaminated solution. Moreover, the reversibility of the sensor in the presence of CN- and Hg2+ originated a logic gate mimic ensemble. Additionally, the real-field along with the in vitro CN- detection efficiency of the photostable DTPH was also accomplished by using various biological specimens.
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Affiliation(s)
- Amita Mondal
- CSIR-Central
Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India
- Department
of Chemistry, National Institute of Technology, M. G. Avenue, Durgapur 713209, West
Bengal, India
| | - Abhijit Hazra
- CSIR-Central
Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India
- Academy
of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff
College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar
Pradesh, India
| | - Jitamanyu Chakrabarty
- Department
of Chemistry, National Institute of Technology, M. G. Avenue, Durgapur 713209, West
Bengal, India
| | - Jagadeesh C. Bose K
- University
Institute of Biotechnology, Chandigarh University, Mohali, Punjab 140413, India
| | - Priyabrata Banerjee
- CSIR-Central
Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India
- Academy
of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff
College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar
Pradesh, India
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Das S, Khanikar P, Hazarika Z, Rohman MA, Uzir A, Nath Jha A, Singha Roy A. Deciphering the Interaction of 5,7-Dihydroxyflavone with Hen-Egg-White Lysozyme through Multispectroscopic and Molecular Dynamics Simulation Approaches. ChemistrySelect 2018. [DOI: 10.1002/slct.201800280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sourav Das
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Portia Khanikar
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Zaved Hazarika
- Department of Molecular Biology and Biotechnology; Tezpur University; Tezpur 784028 India
| | - Mostofa Ataur Rohman
- Centre for Advanced Studies; Department of Chemistry; North-Eastern Hill University; Shillong 793022 India
| | - Antara Uzir
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Anupam Nath Jha
- Department of Molecular Biology and Biotechnology; Tezpur University; Tezpur 784028 India
| | - Atanu Singha Roy
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
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12
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β-Carotene and Milk Protein Complexation: a Thermodynamic Approach and a Photo Stabilization Study. FOOD BIOPROCESS TECH 2017. [DOI: 10.1007/s11947-017-2028-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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13
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Roy AS, Samanta SK, Ghosh P, Tripathy DR, Ghosh SK, Dasgupta S. Cell cytotoxicity and serum albumin binding capacity of the morin-Cu(ii) complex and its effect on deoxyribonucleic acid. MOLECULAR BIOSYSTEMS 2017; 12:2818-33. [PMID: 27345944 DOI: 10.1039/c6mb00344c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The dietary components, flavonoids, are important for their anti-oxidant properties and the ability to act as metal ion chelators. The characterization of the morin-Cu(ii) complex is executed using elemental analysis, FTIR and mass spectroscopy. DNA cleaving and cell cytotoxicity properties followed by serum albumin binding have been investigated in this report. The morin-Cu(ii) complex was found to cleave plasmid pBR322 DNA via an oxidative pathway as revealed by agarose gel based assay performed in the presence of some scavengers and reactive oxygen species. The breaking of the deoxyribose ring of calf thymus DNA (ct-DNA) was also confirmed by the formation of thiobarbituric acid reacting species (TBARS) between thiobarbituric acid and malonaldehyde. The morin-Cu(ii) complex is able to inhibit the growth of human HeLa cells. Fluorescence studies revealed that the morin-Cu(ii) complex can quench the intrinsic fluorescence of serum albumins (SAs) via a static quenching method. The binding constants were found to be in the order of 10(5) M(-1) and observed to increase with temperature. Both ΔH° and ΔS° are positive for the binding of the morin-Cu(ii) complex with serum albumins which indicated the presence of hydrophobic forces. Site-selectivity studies reveal that the morin-Cu(ii) complex binds to both site 1 (subdomain IIA) and site 2 (subdomain IIIA) of human serum albumin (HSA) and bovine serum albumin (BSA). Circular dichroism (CD) studies showed the structural perturbation of SAs during binding with the morin-Cu(ii) complex. The results from binding studies confirmed that after complexation with the Cu(ii) ion, morin alters its mode of interaction with SAs which could have differential implications on its other biological and pharmaceutical properties.
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Affiliation(s)
- Atanu Singha Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
| | - Sintu Kumar Samanta
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
| | - Pooja Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
| | - Debi Ranjan Tripathy
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
| | - Sudip Kumar Ghosh
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
| | - Swagata Dasgupta
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
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Antioxidant flavone analog functionalized fluorescent silica nanoparticles: Synthesis and exploration of their possible use as biomolecule sensor. Colloids Surf B Biointerfaces 2017; 157:286-296. [PMID: 28601757 DOI: 10.1016/j.colsurfb.2017.05.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 05/23/2017] [Accepted: 05/29/2017] [Indexed: 12/18/2022]
Abstract
For the first time, a synthetic fluorescent antioxidant flavone analog was successfully anchored onto the surface of the APTES-modified mesoporous silica nanoparticles (NPs) through sulfonamide linkage. The surface chemistry and morphology of the flavone modified fluorescent silica (FMFS) NPs were studied in detail. The flavone moiety when attached onto the FMFS NP surface, imparted its characteristic fluorescence and antioxidant activities to these NPs. Moreover, the NPs are highly biocompatible as evidenced from their cytotoxicity assay on normal lung cell (L132). The fluorescence activity of these biocompatible NPs was further utilized to study their interaction with a biomolecule, BSA (Bovine Serum Albumin). It was interesting to note that the fluorescence behavior of FMFS NPs completely changed on their binding with BSA. On the other hand, the intrinsic fluorescence activity of BSA was also significantly modified due to its interaction with FMFS NPs. Thus, the sensing and detection of biomolecules like BSA in presence of FMFS NPs can be accomplished by monitoring changes in the fluorescence behavior of either FMFS NPs or BSA. Furthermore, these FMFS NPs retained their intrinsic fluorescence behavior in the cellular medium which opens up their possible use as biocompatible cell imaging agents in future.
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Esfandfar P, Falahati M, Saboury A. Spectroscopic studies of interaction between CuO nanoparticles and bovine serum albumin. J Biomol Struct Dyn 2016; 34:1962-8. [PMID: 26555383 DOI: 10.1080/07391102.2015.1096213] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Recently, the great interests in manufacturing and application of metal oxide nanoparticles in commercial and industrial products have led to focus on the potential impact of these particles on biomacromolecules. In the present study, the interaction of copper oxide (CuO) nanoparticles with bovine serum albumin (BSA) was studied by spectroscopic techniques. The zeta potential value for BSA and CuO nanoparticles with average diameter of around 50 nm at concentration of 10 μM in the deionized (DI) water were -5.8 and -22.5 mV, respectively. Circular dichroism studies did not show any changes in the content of secondary structure of the protein after CuO nanoparticles interaction. Fluorescence data revealed that the fluorescence quenching of BSA by CuO nanoparticles was the result of the formed complex of CuO nanoparticles - BSA. Binding constants and other thermodynamic parameters were determined at three different temperatures. The hydrogen bond interactions are the predominant intermolecular forces to stabilize the CuO nanoparticle - BSA complex. This study provides important insight into the interaction of CuO nanoparticles with proteins, which may be of importance for further application of these nanoparticles in biomedical applications.
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Affiliation(s)
- Paniz Esfandfar
- a Department of Biomedical Engineering, Science and Research Branch , Islamic Azad University , Tehran , Iran
| | - Mojtaba Falahati
- b Department of Nanotechnology , Faculty of Advance Science and Technology, Pharmaceutical Sciences Branch , Islamic Azad University (IAUPS) , Tehran , Iran
| | - AliAkbar Saboury
- c Institute of Biochemistry and Biophysics, University of Tehran , Tehran , Iran
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Sharma V, Arora EK, Cardoza S. 4-Hydroxy-benzoic acid (4-diethylamino-2-hydroxy-benzylidene)hydrazide: DFT, antioxidant, spectroscopic and molecular docking studies with BSA. LUMINESCENCE 2015; 31:738-45. [DOI: 10.1002/bio.3018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 07/27/2015] [Accepted: 07/27/2015] [Indexed: 01/21/2023]
Affiliation(s)
- Vibha Sharma
- Chemistry Department, St. Stephen's College; University of Delhi; Delhi 110007 India
| | - Ekta Kundra Arora
- Chemistry Department, St. Stephen's College; University of Delhi; Delhi 110007 India
| | - Savio Cardoza
- Chemistry Department, St. Stephen's College; University of Delhi; Delhi 110007 India
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Wang J, Wang Q, Wu D, Yan J, Wu Y, Li H. Comparative studies on the interactions of baicalein and Al(III)-baicalein complex with human serum albumin. LUMINESCENCE 2015; 31:54-62. [DOI: 10.1002/bio.2921] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 03/13/2015] [Accepted: 03/15/2015] [Indexed: 01/25/2023]
Affiliation(s)
- Jing Wang
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Qing Wang
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Di Wu
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Jin Yan
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - You Wu
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Hui Li
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
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Ghisaidoobe ABT, Chung SJ. Intrinsic tryptophan fluorescence in the detection and analysis of proteins: a focus on Förster resonance energy transfer techniques. Int J Mol Sci 2014; 15:22518-38. [PMID: 25490136 PMCID: PMC4284722 DOI: 10.3390/ijms151222518] [Citation(s) in RCA: 510] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 11/08/2014] [Accepted: 11/18/2014] [Indexed: 12/18/2022] Open
Abstract
Förster resonance energy transfer (FRET) occurs when the distance between a donor fluorophore and an acceptor is within 10 nm, and its application often necessitates fluorescent labeling of biological targets. However, covalent modification of biomolecules can inadvertently give rise to conformational and/or functional changes. This review describes the application of intrinsic protein fluorescence, predominantly derived from tryptophan (λ EX ≈ 280 nm, λ EM ≈ 350 nm), in protein-related research and mainly focuses on label-free FRET techniques. In terms of wavelength and intensity, tryptophan fluorescence is strongly influenced by its (or the proteinlocal environment, which, in addition to fluorescence quenching, has been applied to study protein conformational changes. Intrinsic Förster resonance energy transfer (iFRET), a recently developed technique, utilizes the intrinsic fluorescence of tryptophan in conjunction with target-specific fluorescent probes as FRET donors and acceptors, respectively, for real time detection of native proteins.
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Affiliation(s)
| | - Sang J Chung
- Department of Chemistry, Dongguk University, Seoul 100-715, Korea.
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Singha Roy A, Utreja J, Badhei S. Characterization of the binding of fisetin and morin with chicken egg lysozyme using spectroscopic and molecular docking methods. J INCL PHENOM MACRO 2014. [DOI: 10.1007/s10847-014-0465-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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