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Ali MS, Al-Lohedan HA, Bhati R, Muthukumaran J. Interaction of the lysozyme with anticoagulant drug warfarin: Spectroscopic and computational analyses. Heliyon 2024; 10:e30818. [PMID: 38784535 PMCID: PMC11112289 DOI: 10.1016/j.heliyon.2024.e30818] [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: 12/07/2023] [Revised: 05/02/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
Warfarin is a cardiovascular drug, used to treat or inhibit the coagulation of the blood. In this paper, we have studied the interaction of lysozyme with warfarin using several experimental (fluorescence, UV-visible and circular dichroism spectroscopies) and computational (molecular docking, molecular dynamics and DFT) approaches. Experimental studies have suggested that there was a strong interaction between lysozyme and warfarin. Inner filter effect played important role in fluorescence experimental data which show that the emission intensity of lysozyme decreased on the addition of warfarin, however, after inner filter effect correction the actual outcome turned out be the fluorescence enhancement. The extent of binding, increased with temperature rise. The interaction was primarily taken place via the dominance of hydrophobic forces. Small amount of warfarin didn't influence the secondary structure of lysozyme; however, the higher concentration of warfarin caused a decrease in the helicity of the protein and a consequent partial unfolding. Molecular docking studies were also performed which revealed that warfarin binds with lysozyme mainly with hydrophobic forces along with a significant contribution of hydrogen bonding. The flexibility of warfarin played important role in fitting the molecule into the binding pocket of lysozyme. Frontier molecular orbitals of warfarin, using DFT, in free as well as complexed form have also been calculated and discussed. Molecular dynamics simulations of unbound and warfarin bound lysozyme reveal a stable complex with slightly higher RMSD values in the presence of warfarin. Despite slightly increased RMSF values, the overall compactness and folding properties remain consistent, emphasizing strong binding towards lysozyme through the results obtained from intermolecular hydrogen bonding analysis. Essential dynamics analysis suggests warfarin induces slight structural changes without significantly altering the conformation, additionally supported by SASA patterns. Aside from the examination of global and essential motion, the MM/PBSA-based analysis of binding free energy elucidates the significant binding of warfarin to lysozyme, indicating a binding free energy of -13.3471 kcal/mol.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
| | - Hamad A. Al-Lohedan
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
| | - Rittik Bhati
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida, India
| | - Jayaraman Muthukumaran
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida, India
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Ali MS, Al-Lohedan HA, Bhati R, Muthukumaran J. Probing the interaction of lysozyme with cardiac glycoside digitoxin: experimental and in silico analyses. Front Mol Biosci 2023; 10:1327740. [PMID: 38187092 PMCID: PMC10770834 DOI: 10.3389/fmolb.2023.1327740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/06/2023] [Indexed: 01/09/2024] Open
Abstract
Digitoxin is a cardiac glycoside used to treat heart failure and heart arrhythmia. However, its therapeutic concentration range is very narrow. High doses of digitoxin are associated with severe side effects; therefore, it is necessary to develop the delivery system which can control the plasma levels of it. In this context, the binding of lysozyme, an important protein having many applications, with digitoxin has been studied to see the ability of the former as a carrier. The studies were carried out using both experimental and computational methods. The intrinsic fluorescence of lysozyme increased on the addition of digitoxin. Fluorescence results suggested that there was a strong interaction between lysozyme and digitoxin which was favored, mainly, by hydrophobic forces. Further, digitoxin affected the secondary structure of lysozyme slightly by causing the partial unfolding of lysozyme. The preferred binding site of digitoxin within lysozyme was the large cavity of the protein. Molecular docking studies also established the principal role of hydrophobic forces in the binding with a significant support of hydrogen bonding. Frontier molecular orbitals of free digitoxin and in complexation with lysozyme were also computed and discussed. The findings from molecular dynamics simulation studies elucidate that, when contrasted with the first and third conformations of the digitoxin-bound lysozyme complex, the second conformation promotes structural stability, reduces flexibility, and enhances the compactness and folding properties of lysozyme. The overall study shows that lysozyme could act as a potential carrier for digitoxin in pharmaceutical formulations.
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Affiliation(s)
- Mohd Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Hamad A. Al-Lohedan
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Rittik Bhati
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida, India
| | - Jayaraman Muthukumaran
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida, India
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3
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Ali MS, Al-Lohedan HA. Spectroscopic and Molecular Docking Studies of the Interaction of Non-steroidal Anti-inflammatory Drugs with a Carrier Protein: an Interesting Case of Inner Filter Effect and Intensity Enhancement in Protein Fluorescence. J Fluoresc 2023:10.1007/s10895-023-03422-w. [PMID: 37665513 DOI: 10.1007/s10895-023-03422-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
Interaction of diclofenac and indomethacin with lysozyme was studied using several spectroscopic and molecular docking methods. Difference UV-visible spectra showed that the absorption profile of lysozyme changed when both diclofenac and indomethacin were mixed with the former. The sequential addition of both drugs to the lysozyme solution caused the decrease of the intrinsic fluorescence of the latter, however, when the data were corrected for inner filter effect, an enhancement in the fluorescence of lysozyme was detected. Accordingly, the fluorescence enhancement data were analyzed using Benesi-Hildebrand equation. Both, diclofenac and indomethacin showed good interaction with lysozyme, although, the association constants of indomethacin were nearly two-fold higher as compared to that of diclofenac. The binding was slightly more spontaneous in case of indomethacin and the major forces involved in the binding of both drugs with lysozyme were hydrogen bonding and hydrophobic interactions. Secondary structural analysis revealed that both drugs partially unfolded lysozyme. Results obtained through molecular docking were also in good agreement with the experimental outcomes. Both, diclofenac and indomethacin, are bounded at the same site inside lysozyme which is located in the big hydrophobic cavity of the protein.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia.
| | - Hamad A Al-Lohedan
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
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Garcia PF, Saez Torillo SN, Anzani A, Argüello G, Burgos Paci MA. Characterization of Binding Properties of Cr(Phen) 3 3+ and Ru(Phen) 3 2+ Complexes with Human Lactoferrin. Photochem Photobiol 2023; 99:1225-1232. [PMID: 36504265 DOI: 10.1111/php.13760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
This work presents research about [Cr(phen)3 ]3+ and [Ru(phen)3 ]2+ interaction with human lactoferrin (HLf), a key carrier protein of ferric cations. The photochemical and photophysical properties of [Cr(phen)3 ]3+ and [Ru(phen)3 ]2+ have been widely studied in the last decades due to their potential use as photosensitizers in photodynamic therapy (PDT). The behavior between the complexes and the protein was studied employing UV-visible absorption, fluorescence emission and circular dichroism spectroscopic techniques. It was found that both complexes bind to HLf with a large binding constant (Kb ): 9.46 × 104 for the chromium complex and 4.16 × 104 for the ruthenium one at 299 K. Thermodynamic parameters were obtained from the Van't Hoff equation. Analyses of entropy (ΔS), enthalpy (ΔH) and free energy changes (ΔG) indicate that these complexes bind to HLf because of entropy-driven processes and electrostatic interactions. According to circular dichroism experiments, no conformational changes have been observed in the secondary and tertiary structure of the protein in the presence of any of the studied complexes. These experimental results suggest that [Cr(phen)3 ]3+ and [Ru(phen)3 ]2+ bind to HLf, indicating that this protein could act as a carrier of these complexes in further applications.
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Affiliation(s)
- Pablo Facundo Garcia
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC) CONICET-UNC, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Santiago N Saez Torillo
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC) CONICET-UNC, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Angel Anzani
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC) CONICET-UNC, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Gerardo Argüello
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC) CONICET-UNC, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Maxi A Burgos Paci
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC) CONICET-UNC, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
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Lan Y, Wei Y, Wei Y, Wang L, Dong C. Versatile Triple-Output Molecular Logic Gate for Cysteine and Silver (I) in Foods and the Environment Based on I-Motif DNA Modulation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3608-3617. [PMID: 35289171 DOI: 10.1021/acs.jafc.1c07469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
DNA-based molecular logic gates have been developed rapidly but most of them have a single output mode. This study is to develop a triple-output label-free fluorescent DNA-based multifunctional molecular logic gate with berberine as a fluorescent signal and a Ag+-aptamer as a recognition matrix. The Ag+-aptamer has been identified to switch from a random coil to an i-motif structure of C-Ag+-C from a Ag+-induced responsive conformational change. As a fluorescent probe, berberine is ultrasensitive to the changes of microenvironments, and the binding to i-motif DNA's more rigid structure causes a significant increase in fluorescence, anisotropy, and lifetime. The addition of cysteine to the berberine/C-Ag+-C system disintegrates the i-motif DNA structure because of the strong coordination between Ag+ and cysteine, and then the triple-output signals are almost retrieved. Given this, a highly sensitive triple-output molecular logic gate for the analyses of Ag+ and cysteine is constructed with high specificity. Moreover, this simple and cost-effective molecular logic gate has been applied for the detection of cysteine and Ag+ in various real environmental samples including river water, PM2.5, soil, and food samples with satisfactory recoveries from 89.83 to 106.04%.
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Affiliation(s)
- Yifeng Lan
- Shanxi Laboratory for Yellow River, Institute of Environmental Science, Shanxi University, Taiyuan 030006, P. R. China
| | - Yuxin Wei
- Shanxi Laboratory for Yellow River, Institute of Environmental Science, Shanxi University, Taiyuan 030006, P. R. China
| | - Yanli Wei
- Shanxi Laboratory for Yellow River, Institute of Environmental Science, Shanxi University, Taiyuan 030006, P. R. China
| | - Li Wang
- Shanxi Laboratory for Yellow River, Institute of Environmental Science, Shanxi University, Taiyuan 030006, P. R. China
| | - Chuan Dong
- Shanxi Laboratory for Yellow River, Institute of Environmental Science, Shanxi University, Taiyuan 030006, P. R. China
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Giel KE, Bulik CM, Fernandez-Aranda F, Hay P, Keski-Rahkonen A, Schag K, Schmidt U, Zipfel S. Binge eating disorder. Nat Rev Dis Primers 2022; 8:16. [PMID: 35301358 PMCID: PMC9793802 DOI: 10.1038/s41572-022-00344-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/28/2022] [Indexed: 12/30/2022]
Abstract
Binge eating disorder (BED) is characterized by regular binge eating episodes during which individuals ingest comparably large amounts of food and experience loss of control over their eating behaviour. The worldwide prevalence of BED for the years 2018-2020 is estimated to be 0.6-1.8% in adult women and 0.3-0.7% in adult men. BED is commonly associated with obesity and with somatic and mental health comorbidities. People with BED experience considerable burden and impairments in quality of life, and, at the same time, BED often goes undetected and untreated. The aetiology of BED is complex, including genetic and environmental factors as well as neuroendocrinological and neurobiological contributions. Neurobiological findings highlight impairments in reward processing, inhibitory control and emotion regulation in people with BED, and these neurobiological domains are targets for emerging treatment approaches. Psychotherapy is the first-line treatment for BED. Recognition and research on BED has increased since its inclusion into DSM-5; however, continuing efforts are needed to understand underlying mechanisms of BED and to improve prevention and treatment outcomes for this disorder. These efforts should also include screening, identification and implementation of evidence-based interventions in routine clinical practice settings such as primary care and mental health outpatient clinics.
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Affiliation(s)
- Katrin E Giel
- Department of Psychosomatic Medicine and Psychotherapy, Medical University Hospital Tübingen, Tübingen, Germany.
- Center of Excellence for Eating Disorders (KOMET), Tübingen, Germany.
| | - Cynthia M Bulik
- Department of Psychiatry, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Fernando Fernandez-Aranda
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain
- Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, Spain
- Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
| | - Phillipa Hay
- Translational Health Research Institute, Western Sydney University, Sydney, NSW, Australia
- Camden and Campbelltown Hospitals, SWSLHD, Campbelltown, NSW, Australia
| | | | - Kathrin Schag
- Department of Psychosomatic Medicine and Psychotherapy, Medical University Hospital Tübingen, Tübingen, Germany
- Center of Excellence for Eating Disorders (KOMET), Tübingen, Germany
| | - Ulrike Schmidt
- Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- South London and Maudsley NHS Foundation Trust, London, UK
| | - Stephan Zipfel
- Department of Psychosomatic Medicine and Psychotherapy, Medical University Hospital Tübingen, Tübingen, Germany
- Center of Excellence for Eating Disorders (KOMET), Tübingen, Germany
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Wei Z, Lan Y, Zhang C, Jia J, Niu W, Wei Y, Fu S, Yun K. A label-free Exonuclease I-assisted fluorescence aptasensor for highly selective and sensitive detection of silver ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 260:119927. [PMID: 34020384 DOI: 10.1016/j.saa.2021.119927] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/21/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
Based on the specific interaction of Ag+ and cytosine-cytosine (C-C) base mismatch and using berberine (Ber) as the fluorescent probe and Exonuclease I (Exo I) as the background fluorescence reducing tool, a label-free Exo I-assisted fluorescence aptamer sensing platform was established for the detection of silver ions with high sensitivity and selectivity. Exo I reduced the fluorescence background of the Ber/Ag+-aptamer complex to a level similar to that of Ber itself in the absence of Ag+. After introducing Ag+ into the sensing system, it induces the aptamer rich in base C to form C-Ag+-C i-motif structure which are resistant to degradation mediated by Exo I. The concentration of Ber, Ag+-aptamer, Exo I and the temperature and reaction time for Exo I were all optimized. Under the optimal experimental conditions, the detection limit of Ag+ was 4.4 nM and the linear range was from 0.0059 μM to 235.48 μM with a coefficient of determination (R2) > 0.99. Moreover, the proposed strategy had been successfully applied to the detection of Ag+ in tap water and human serum with a good recovery ranging from 88.4% to 106.9%.
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Affiliation(s)
- Zhiwen Wei
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China.
| | - Yifeng Lan
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China
| | - Chao Zhang
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China
| | - Juan Jia
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China
| | - Weifen Niu
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China
| | - Yanli Wei
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, People's Republic of China
| | - Shanlin Fu
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China; Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW 2007 Australia
| | - Keming Yun
- School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, People's Republic of China.
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Mao X, Long L, Shen J, Lin K, Yin L, Yi J, Zhang LM, Deng DYB, Yang L. Nanoparticles composed of the tea polysaccharide-complexed cationic vitamin B 12-conjugated glycogen derivative. Food Funct 2021; 12:8522-8534. [PMID: 34312648 DOI: 10.1039/d1fo00487e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tea polysaccharides exhibit multiple important bioactivities, but very few of them can be absorbed through the small intestine. To enhance the absorption efficacy of tea polysaccharides, a cationic vitamin B12-conjugated glycogen derivative bearing the diethylenetriamine residues (VB12-DETA-Gly) was synthesized and characterized using FTIR, 1H NMR, and UV-vis spectroscopy. An acidic tea polysaccharide (TPSA) was isolated from green tea. The TPSA/VB12-DETA-Gly complexed nanoparticles were prepared, which showed positive zeta potentials and were irregular spherical nanoparticles in the sizes of 50-100 nm. To enable the fluorescence and UV-vis absorption properties of TPSA, a Congo red residue-conjugated TPSA derivative (CR-TPSA) was synthesized. The interactions and complexation mechanism between the CR-TPSA and the VB12-DETA-Gly derivatives were investigated using fluorescence spectroscopy, resonance light scattering spectroscopy, and UV-vis spectroscopy. The results indicated that the electrostatic interaction could play a major role during the CR-TPSA and VB12-DETA-Gly-II complexation processes. The TPSA/VB12-DETA-Gly nanoparticles were nontoxic and exhibited targeted endocytosis for the Caco-2 cells, and showed high permeation through intestinal enterocytes using the Caco-2 cell model. Therefore, they exhibit potential for enhancing the absorption efficacy of tea polysaccharides through the small intestinal mucosa.
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Affiliation(s)
- Xuhong Mao
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - Lingli Long
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
| | - Juncheng Shen
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - Kunhua Lin
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - Lin Yin
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - Juzhen Yi
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - Li-Ming Zhang
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
| | - David Y B Deng
- Scientific Research Center and Department of Orthopedic, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China and Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
| | - Liqun Yang
- School of Materials Science and Engineering, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou 510275, China.
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Sharma GS, Bhattacharya R, Singh LR. Functional inhibition of redox regulated heme proteins: A novel mechanism towards oxidative stress induced by homocysteine. Redox Biol 2021; 46:102080. [PMID: 34325357 PMCID: PMC8334742 DOI: 10.1016/j.redox.2021.102080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 07/22/2021] [Indexed: 11/19/2022] Open
Abstract
Homocysteine (Hcy) is a sulfur containing non-protein toxic amino acid synthesized from methionine. Elevated level of Hcy is associated with cardiovascular complications and neurodegeneration. Hcy is believed to induce organ damage and apoptosis via oxidative stress. The pro-oxidant nature of Hcy is considered to originate from the metal-induced oxidation of thiol group-containing molecules forming disulfides (Hcy-Hcy, Hcy-cysteine, Hcy-glutathione, etc) or with free cysteine residues of proteins (a process called protein S-homocysteinylation). Formation of such disulfides indeed results in the generation of reactive oxygen species (ROS) which eventually leads to loss of cellular integrity. In the present manuscript, we performed systematic investigation of the effect of Hcy on iron containing proteins. We discover a novel mechanism of Hcy toxicity wherein Hcy oxidation is linked with the functional loss of the protein with iron as cofactors. Our results indicate that redox regulated heme proteins might be primarily involved in the Hcy toxicity and associated oxidative stress.
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Affiliation(s)
- Gurumayum Suraj Sharma
- Department of Botany, Bhaskaracharya College of Applied Sciences, University of Delhi, Delhi, 110075, India
| | - Reshmee Bhattacharya
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India
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Liu R, Wu L, Feng H, Tang F, Si H, Yao X, He W. The study on the interactions of two 1,2,3-triazoles with several biological macromolecules by multiple spectroscopic methodologies and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118795. [PMID: 32814256 DOI: 10.1016/j.saa.2020.118795] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/18/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
1-(4-chlorophenyl)-5-phenyl-1H-1,2,3-triazole (CPTC) and 5-(3-chlorophenyl) -1-phenyl-1H-1,2,3-triazole (PCTA) are two new derivatives of 1,2,3-triazole. Their structural and spectral properties were characterized by density functional theory calculations (DFT). The binding properties of CPTC or PCTA with several typical biomacromolecules such as human serum albumin (HSA), bovine hemoglobin (BHb), human immunoglobulin (HIgG) or DNA were investigated by molecular docking and multiple spectroscopic methodologies. The different parameters including binding constants and thermodynamic parameters for CPTC/PCTA-HSA/BHb/HIgG/DNA systems were obtained based on various fluorescence enhancement or quenching mechanisms. The results of binding constants indicated that there were the strong interactions between two triazoles and four biological macromolecules due to the higher order of magnitude between 103 and 105. The values of thermodynamic parameters revealed that the binding forces for these systems are mainly hydrophobic interactions, electrostatic force, or hydrogen bond, respectively, which are in agreement with the results of molecular docking to a certain extent. Moreover, the information from synchronous, 3D fluorescence and UV-Vis spectroscopies proved that two compounds CPTC and PCTA could affect the microenvironment of amino acids residues of three kinds of proteins. Based on the above experimental results, a comparison of the interaction mechanisms for CPTC/PCTA-proteins/DNA systems have been performed in view of their different molecular structures, which is beneficial for the further research in order to design them as the novel drugs.
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Affiliation(s)
- Rongqiang Liu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Luyong Wu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Huajie Feng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Fengqi Tang
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Hongzong Si
- Institute for Computational Science and Engineering, Qingdao University, 266071 Qingdao, China
| | - Xiaojun Yao
- College of Chemical and Chemical Engineering, Lanzhou University, 730000 Lanzhou, China
| | - Wenying He
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China.
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11
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Sensitive detection of amoxicillin in aqueous solution with novel fluorescent probes containing boron-doped carbon quantum dots. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113278] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Lan Y, Qin G, Wei Y, Wang L, Dong C. Exonuclease I-assisted fluorescence aptasensor for tetrodotoxin. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 194:110417. [PMID: 32171958 DOI: 10.1016/j.ecoenv.2020.110417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 02/02/2020] [Accepted: 03/01/2020] [Indexed: 06/10/2023]
Abstract
A fluorescence aptasensor for the highly specific and sensitive determination of tetrodotoxin was established with tetrodotoxin-aptamer as the recognition unit, berberine as the signal reporter and exonuclease I as the elimination agent for the background. Berberine has a weak fluorescence emission at 540 nm, and it can form the tetrodotoxin-aptamer/berberine complex, resulted in an increased fluorescence. After introducing exonuclease I, it can degrade the single strand oligonucleotides of tetrodotoxin-aptamer into the single nucleotide in the absence of tetrodotoxin, which lead to dramatic fluorescence quenching, and reduce the background signal of sensing system. Once tetrodotoxin is in the presence, tetrodotoxin-aptamer is converted into the stable neck ring conformation, which resists the degradation of exonuclease I and provides a more rigid micro-environment for the excited state of berberine, and then the strong fluorescence is observed. Based on the above properties, an ultrasensitive label-free fluorescence aptasensor for tetrodotoxin is established. The fluorescence aptasensor shows good analytical performance with the linear increase of fluorescence intensity at the tetrodotoxin concentration from 0.030 nM to 6.0 × 103 nM. The detection limit of 11.0 pM is much lower than that of other reported sensor methods.
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Affiliation(s)
- Yifeng Lan
- Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China
| | - Guojie Qin
- Institute of Horticulture, Shanxi Academy of Agriculture Science, Taiyuan, 030031, China
| | - Yanli Wei
- Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China.
| | - Li Wang
- Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China.
| | - Chuan Dong
- Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China
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Garcia PF, Coronel Arrechea C, Velo A, Riva J, Yudi LM, Argüello GA. Interaction of polypyridyl Cr(III) complexes with bovine serum albumin. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2020; 49:125-132. [PMID: 31927653 DOI: 10.1007/s00249-019-01416-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 10/28/2019] [Accepted: 12/16/2019] [Indexed: 06/10/2023]
Abstract
We report a detailed investigation of the interaction of Cr(NN)33+ with bovine serum albumin (BSA), an important protein for the transport of drugs in blood plasma which allows us to understand further the role of Cr(NN)33+ as a sensitizer in photodynamic therapy (PDT). Chromium(III) complexes, Cr(5Cl-phen)33+, Cr(5Me-phen)33+ and Cr(5Ph-phen)33+ (where Cl = chlorine, Me = methyl and Ph = phenyl are substituents in position 5 of the phen = 1,10-phenanthroline bidentate ligand), were used for the present study. The interactions of BSA with Cr(NN)33+ were assessed employing fluorescence spectroscopy and UV-Vis absorption spectroscopy; in addition electrochemical experiments carried out at a liquid/liquid interface gave insight into the relative hydrophobicities of the complexes. We found that chromium complexes bind strongly with bovine serum albumins (BSA) with intrinsic binding constants, Kb, of (3.33 ± 0.08) × 105 M-1, (5.92 ± 0.08) × 105 M-1 and (1.64 ± 0.05) × 105 M-1 at 300.3 K. Analysis of the thermodynamic parameters ΔG, ΔH, and ΔS indicated that hydrophobic interactions played a major role in all the BSA-Cr(NN)33+ association processes. The binding distances and transfer efficiencies for BSA binding reactions were calculated according to the Förster theory of non-radiation energy transfer giving distance (r) of 2.63 nm, 2.94 nm and 3.00 nm for 5Clphen, 5Mephen and 5Ph phenanthroline complexes, respectively. All these experimental results indicate that Cr(NN)33+ binds to serum albumins, by which these proteins could act as carriers of this complex for further applications in PDT.
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Affiliation(s)
- Pablo F Garcia
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Consuelo Coronel Arrechea
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Alejandra Velo
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Julieta Riva
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Lidia M Yudi
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Gerardo A Argüello
- Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina.
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Investigation of the Interaction Mechanism between Salbutamol and Human Serum Albumin by Multispectroscopic and Molecular Docking. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1693602. [PMID: 32104676 PMCID: PMC7035540 DOI: 10.1155/2020/1693602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 12/17/2019] [Accepted: 12/30/2019] [Indexed: 11/29/2022]
Abstract
Salbutamol (SBAL), a kind of short-acting beta 2-adrenergic agonist, has been mainly used to treat bronchial asthma and other allergic airway diseases clinically. In this study, the interaction mechanism between salbutamol and human serum albumin was researched by the multispectral method and molecular docking. The fluorescence intensity of HSA could be regularly enhanced with the increase of SBAL concentration. Both the results of the multispectral method and molecular docking showed that SBAL could bind HSA with van der Waals force and hydrogen bonds. The binding mechanism was further analysed by UV-Vis and synchronous fluorescence spectra. The contents of the secondary structure of free HSA and SBAL-HSA complex were evaluated using CD spectra.
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Banerjee S. Effect of Glyoxal Modification on a Critical Arginine Residue (Arg-31α) of Hemoglobin: Physiological Implications of Advanced Glycated end Product an in vitro Study. Protein Pept Lett 2019; 27:770-781. [PMID: 31774041 DOI: 10.2174/0929866526666191125101122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 10/31/2019] [Accepted: 10/31/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Non-enzymatic protein glycation is involved in structure and stability changes that impair protein functionality, resulting in several human diseases, such as diabetes and amyloidotic neuropathies (Alzheimer's disease, Parkinson's disease and Andrade's syndrome). Glyoxal, an endogenous reactive oxoaldehyde, increases in diabetes and reacts with several proteins to form advanced glycation end products through Maillard-like reaction. OBJECTIVE Human hemoglobin, the most abundant protein in blood cells is subjected to nonenzymatic modification by reactive oxoaldehydes in diabetic condition. In the present study, the effect of a low concentration of glyoxal (5 μM) on hemoglobin (10 μM) has been investigated following a period of 30 days incubation in vitro. METHODS Different techniques, mostly biophysical and spectroscopic (e.g. circular dichroism, differential scanning calorimetric study, dynamic light scattering, mass spectrometry, etc.) were used to study glyoxal-induced changes of hemoglobin. RESULTS Glyoxal-treated hemoglobin exhibits decreased absorbance around 280 nm, decreased fluorescence and reduced surface hydrophobicity compared to normal hemoglobin. Glyoxal treatment enhances the stability of hemoglobin and lowers its susceptibility to thermal aggregation compared to control hemoglobin as seen by different studies. Finally, peptide mass fingerprinting study showed glyoxal to modify an arginine residue of α-chain of hemoglobin (Arg-31α) to hydroimidazolone. CONCLUSION Increased level of glyoxal in diabetes mellitus as well as its high reactivity may cause modifications of the heme protein. Thus, considering the significance of glyoxal-induced protein modification under physiological conditions, the observation appears clinically relevant in terms of understanding hydroimidazolone-mediated protein modification under in vivo conditions.
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Affiliation(s)
- Sauradipta Banerjee
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, Kolkata 700009, India
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Lan Y, Qin G, Wei Y, Dong C, Wang L. Highly sensitive analysis of tetrodotoxin based on free-label fluorescence aptamer sensing system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:411-418. [PMID: 31059893 DOI: 10.1016/j.saa.2019.04.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/23/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Tetrodotoxin (TTX) specifically can bind to its nucleic acid aptamer (TTX-aptamer) and cause the conformation of TTX-aptamer to be switched from the single-strand random coiling form to the compact neck ring structure. Based on the microenvironment difference of the fluorescence reporter, berberine in between the single-stranded coil oligonucleotides and the structure of the neck ring, a simple, rapid and sensitive label-free fluorescence aptamer sensing system for detection of TTX was developed. Various factors affecting the analysis of TTX were optimized, including the concentration of berberine, ion strength, pH, reaction time, the concentration of TTX-aptamer. Under the optimal experimental conditions, the fluorescence intensity of the sensing system and the concentration of TTX showed a good linear relationship in the range of 0.1 nM to 500 nM, with the detection limit of 0.074 nM. The standard recovery test result exhibited that the recoveries of TTX in serum samples were 96.54%-106.40%. The established method has the advantages of high specificity, good sensitivity, quickness and convenience, low cost, and can be used for the detection of TTX in serum samples.
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Affiliation(s)
- Yifeng Lan
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Guojie Qin
- Institute of Horticulture, Shanxi Academy of Agriculture Science, Taiyuan 030031, PR China
| | - Yanli Wei
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China.
| | - Chuan Dong
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Li Wang
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
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17
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Wang C, Zhou X, Wang H, Sun X, Guo M. Interactions between β-Lactoglobulin and 3,3'-Diindolylmethane in Model System. Molecules 2019; 24:molecules24112151. [PMID: 31181617 PMCID: PMC6600512 DOI: 10.3390/molecules24112151] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/31/2019] [Accepted: 06/06/2019] [Indexed: 01/13/2023] Open
Abstract
The compound 3,3′-diindolylmethane (DIM) has a broad spectrum of anticancer activities. However, low stability and bioavailability limit its application. Elucidating interactions between DIM and β-lactoglobulin (β-LG) may be useful for fabricating whey protein-based protecting systems. Interaction with DIM increased the diameter and absolute zeta potential value of β-LG. UV-absorption spectra suggested that there was a complex of DIM and β-LG. β-LG showed enhanced fluorescence intensity by complexing with DIM with a binding constant of 6.7 × 105 M−1. Upon interaction with DIM, β-LG was decreased in secondary structure content of helix and turn while increased in β-sheet and unordered. FT-IR spectra and molecular docking results indicated the roles of hydrophobic interaction and hydrogen bond for the formation of DIM and β-LG nanocomplexes. Data suggested that β-LG may be a good vehicle for making a protein-based DIM protection and delivery system due to the tight binding of DIM to β-LG.
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Affiliation(s)
- Cuina Wang
- Key Laboratory of Dairy Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
- Department of Food Science, College of Food Science and Engineering, Jilin University, Changchun 130062, Jilin, China.
| | - Xinhui Zhou
- Key Laboratory of Dairy Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| | - Hao Wang
- Key Laboratory of Dairy Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| | - Xiaomeng Sun
- Key Laboratory of Dairy Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| | - Mingruo Guo
- Key Laboratory of Dairy Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
- Department of Nutrition and Food Sciences, College of Agriculture and Life Sciences, University of Vermont, Burlington, VT 05405, USA.
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18
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Song X, Fu B, Lan Y, Chen Y, Wei Y, Dong C. Label-free fluorescent aptasensor berberine-based strategy for ultrasensitive detection of Hg 2+ ion. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:301-307. [PMID: 29945113 DOI: 10.1016/j.saa.2018.06.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/07/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
A label-free fluorescent aptasensing platform was fabricated and a simple and rapid method to detect Hg2+ ion in aqueous solution was put forward by means of berberine and Hg2+ ion-aptamer are as the fluorescence probe and the recognition element, respectively. Various factors including the concentration of berberine, Hg2+ ion and Hg2+ ion-aptamer, pH effect and the reaction time were investigated in detail. Under the optimal experimental conditions, in the sensing system, the fluorescence intensity changes displayed a calibration response for Hg2+ ion in the range of 0.1 μM to 10.0 μM and the detection limit was of 7.7 nM (S/N = 3). The fabricated label-free fluorescence aptasensor is not only conveniently but also effectively applicable used for analysis of Hg2+ ion in blood serum and tap water samples and the recovery range is of 96.0%-105.7%. In brief, this study offers an easy, economical and stable assay system for detecting Hg2+ ion in rough condition.
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Affiliation(s)
- Xiuli Song
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, PR China; Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Baochun Fu
- Institute of Horticulture, Shanxi Academy of Agriculture Science, Taiyuan 030031, PR China
| | - Yifeng Lan
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Yanxia Chen
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Yanli Wei
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China.
| | - Chuan Dong
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
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Jiao Q, Wang R, Jiang Y, Liu B. Study on the interaction between active components from traditional Chinese medicine and plasma proteins. Chem Cent J 2018; 12:48. [PMID: 29728878 PMCID: PMC5935606 DOI: 10.1186/s13065-018-0417-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 04/24/2018] [Indexed: 02/06/2023] Open
Abstract
Traditional Chinese medicine (TCM), as a unique form of natural medicine, has been used in Chinese traditional therapeutic systems over two thousand years. Active components in Chinese herbal medicine are the material basis for the prevention and treatment of diseases. Research on drug-protein binding is one of the important contents in the study of early stage clinical pharmacokinetics of drugs. Plasma protein binding study has far-reaching influence on the pharmacokinetics and pharmacodynamics of drugs and helps to understand the basic rule of drug effects. It is important to study the binding characteristics of the active components in Chinese herbal medicine with plasma proteins for the medical science and modernization of TCM. This review summarizes the common analytical methods which are used to study the active herbal components-protein binding and gives the examples to illustrate their application. Rules and influence factors of the binding between different types of active herbal components and plasma proteins are summarized in the end. Finally, a suggestion on choosing the suitable technique for different types of active herbal components is provided, and the prospect of the drug-protein binding used in the area of TCM research is also discussed.
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Affiliation(s)
- Qishu Jiao
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Rufeng Wang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yanyan Jiang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Bin Liu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China.
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Xu M, Zhang R, Song W, Zong W, Liu R. Probing the toxic mechanism of bisphenol A with acid phosphatase at the molecular level. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:11431-11439. [PMID: 29423697 DOI: 10.1007/s11356-018-1378-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 01/23/2018] [Indexed: 06/08/2023]
Abstract
As an endocrine-disrupting chemical, bisphenol A (BPA), can affect normal endocrine function of hormone. This paper studied the toxic effect of BPA on acid phosphatase at the molecular level by multi-spectroscopic measurements, molecular docking, and enzyme activity experiment. BPA could enhance the fluorescence intensity, change the structure, and cause an increased hydrophobicity of acid phosphatase. Hydrogen bond interaction and van der Waals forces were the main forces to generate the BPA-acid phosphatase complex on account of the negative ΔH (- 36.92 kJ mol-1) and ΔS (- 50.78 J mol-1 K-1). BPA led to the loosening and unfolding of protein structure and extending the peptide strands, as revealed by UV-vis absorption and CD spectra. Based on the enzyme activity experiment, BPA could decrease the activity of the acid phosphatase by entering the active site of the enzyme. The molecular docking model showed that BPA could bind into the cavity of acid phosphatase and interact with Tyr A252 and a hydrogen bond (1.47 Å) was formed in the binding process. This work suggested the structures and functions of acid phosphatase were both affected by BPA.
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Affiliation(s)
- Mengchen Xu
- School of Environmental Science and Engineering, China -America CRC for Environment & Health, Shandong Province, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Rui Zhang
- School of Environmental Science and Engineering, China -America CRC for Environment & Health, Shandong Province, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Wei Song
- School of Environmental Science and Engineering, China -America CRC for Environment & Health, Shandong Province, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Wansong Zong
- College of Population, Resources and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan, 250014, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, China -America CRC for Environment & Health, Shandong Province, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China.
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21
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Banerjee S. Glyoxal-induced modification enhances stability of hemoglobin and lowers iron-mediated oxidation reactions of the heme protein: An in vitro study. Int J Biol Macromol 2017; 107:494-501. [PMID: 28888546 DOI: 10.1016/j.ijbiomac.2017.08.180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/27/2017] [Accepted: 08/30/2017] [Indexed: 11/29/2022]
Abstract
Glyoxal, a reactive α-oxoaldehyde, increases in diabetic condition. It reacts with different proteins to form advanced glycation end products (AGEs) following Maillard-like reaction. Considering the significance of AGE-mediated protein modification by glyoxal, here we have investigated the in vitro effect of the reactive α-oxoaldehyde (10, 20μM) on the heme protein hemoglobin (HbA0) (100μM) after incubation for one week at 25°C. In comparison with HbA0, glyoxal-treated HbA0 exhibited decreased absorbance around 280nm, reduced intrinsic fluorescence and lower surface hydrophobicity. Glyoxal treatment was found to increase the stability of HbA0 without significant perturbation of the secondary structure of the heme protein. In addition, H2O2-mediated iron release and subsequent iron-mediated oxidative (Fenton) reactions were found to be lower in presence of glyoxal-treated HbA0 compared to HbA0. Mass spectrometric studies revealed modification of arginine residues of HbA0 (Arg-31α, Arg-40β) to hydroimidazolone adducts. AGE-induced modifications thus appear to be associated with the observed changes of the heme protein. Considering the increased level of glyoxal in diabetes mellitus as well as its high reactivity, glyoxal-derived AGE adducts might thus be associated with modifications of the protein including physiological significance.
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Affiliation(s)
- Sauradipta Banerjee
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92, Acharyya Prafulla Chandra Road, Kolkata 700009, India.
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22
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Lai M, Wang J, Tan J, Luo J, Zhang LM, Deng DY, Yang L. Preparation, complexation mechanism and properties of nano-complexes of Astragalus polysaccharide and amphiphilic chitosan derivatives. Carbohydr Polym 2017; 161:261-269. [DOI: 10.1016/j.carbpol.2016.12.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/03/2016] [Accepted: 12/28/2016] [Indexed: 12/26/2022]
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23
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Methylglyoxal modification enhances the stability of hemoglobin and lowers its iron-mediated oxidation reactions: An in vitro study. Int J Biol Macromol 2017; 95:1159-1168. [DOI: 10.1016/j.ijbiomac.2016.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 11/01/2016] [Accepted: 11/02/2016] [Indexed: 01/03/2023]
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24
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Banerjee S. Methyglyoxal administration induces modification of hemoglobin in experimental rats: An in vivo study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 167:82-88. [DOI: 10.1016/j.jphotobiol.2016.12.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/14/2016] [Accepted: 12/21/2016] [Indexed: 01/06/2023]
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25
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Banerjee S, Chakraborti AS. Glyoxal administration induces formation of high molecular weight aggregates of hemoglobin exhibiting amyloidal nature in experimental rats: An in vivo study. Int J Biol Macromol 2016; 93:805-813. [DOI: 10.1016/j.ijbiomac.2016.09.061] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 09/16/2016] [Indexed: 12/24/2022]
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26
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Hu Y, Zhang G, Zhang F. Study of conformation and thermodynamics of α-amylase interaction with ethylene in vitro. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 163:110-4. [DOI: 10.1016/j.jphotobiol.2016.08.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/15/2016] [Indexed: 12/18/2022]
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27
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Chen F, Wang Y, Yang M, Yin J, Meng Q, Bu F, Sun D, Liu J. Interaction of the ginsenosides with κ-casein and their effects on amyloid fibril formation by the protein: Multi-spectroscopic approaches. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 160:306-17. [PMID: 27163725 DOI: 10.1016/j.jphotobiol.2016.04.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 04/06/2016] [Accepted: 04/11/2016] [Indexed: 12/14/2022]
Abstract
The interaction of the ginsenosides (GS) including ginsenoside Rg1, Rb1 and Re with κ-casein and the effects of GS inhibiting amyloid fibril formation by κ-casein have been investigated in vitro by fluorescence and ultraviolet spectra. Results showed that Rg1 and Rb1 had dose-dependent inhibitory effects on reduced and carboxymethylated κ-casein (RCMκ-CN) fibril formation, while Re resulted in an increase in the rate of fibril formation. The enhancement in RLS intensity was attributed to the formation of new complex between GS and RCMκ-CN, and the corresponding thermodynamic parameters (ΔH, ΔS and ΔG) were assayed. The steady-state ultraviolet-visible absorption spectra had also been tested to observe if the ground-state complex formed, and it showed the same result as RLS spectra. The binding constants and the number of binding sites between GS and RCMκ-CN at different temperatures had been evaluated from relevant fluorescence data. According to the Förster non-radiation energy transfer theory, the binding distance between RCMκ-CN and GS was calculated. The fluorescence lifetime of RCMκ-CN was longer in the presence of GS than in absence of GS, which was evident that the hydrophobic interaction plays a major role in the binding of GS to RCMκ-CN. From the results of synchronous fluorescence, it could be deduced that the polarity around RCMκ-CN Trp97 residue decreased and the hydrophobicity increased after addition of Rg1 or Rb1. Based on all the above results, it is explained that Rg1 and Rb1 inhibited amyloid fibril formation by κ-casein because the molecular spatial conformation and physical property of κ-casein changed causing by the complex formation between GS and κ-casein.
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Affiliation(s)
- Fanbo Chen
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Yunhua Wang
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Miao Yang
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Jianyuan Yin
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Qin Meng
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Fengquan Bu
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Dandan Sun
- College of Pharmacy, Jilin University, Changchun 130021, PR China
| | - Jihua Liu
- College of Pharmacy, Jilin University, Changchun 130021, PR China.
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Roy D, Kumar V, James J, Shihabudeen MS, Kulshrestha S, Goel V, Thirumurugan K. Evidence that Chemical Chaperone 4-Phenylbutyric Acid Binds to Human Serum Albumin at Fatty Acid Binding Sites. PLoS One 2015; 10:e0133012. [PMID: 26181488 PMCID: PMC4504500 DOI: 10.1371/journal.pone.0133012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 06/22/2015] [Indexed: 01/22/2023] Open
Abstract
Endoplasmic reticulum stress elicits unfolded protein response to counteract the accumulating unfolded protein load inside a cell. The chemical chaperone, 4-Phenylbutyric acid (4-PBA) is a FDA approved drug that alleviates endoplasmic reticulum stress by assisting protein folding. It is found efficacious to augment pathological conditions like type 2 diabetes, obesity and neurodegeneration. This study explores the binding nature of 4-PBA with human serum albumin (HSA) through spectroscopic and molecular dynamics approaches, and the results show that 4-PBA has high binding specificity to Sudlow Site II (Fatty acid binding site 3, subdomain IIIA). Ligand displacement studies, RMSD stabilization profiles and MM-PBSA binding free energy calculation confirm the same. The binding constant as calculated from fluorescence spectroscopic studies was found to be kPBA = 2.69 x 105 M-1. Like long chain fatty acids, 4-PBA induces conformational changes on HSA as shown by circular dichroism, and it elicits stable binding at Sudlow Site II (fatty acid binding site 3) by forming strong hydrogen bonding and a salt bridge between domain II and III of HSA. This minimizes the fluctuation of HSA backbone as shown by limited conformational space occupancy in the principal component analysis. The overall hydrophobicity of W214 pocket (located at subdomain IIA), increases upon occupancy of 4-PBA at any FA site. Descriptors of this pocket formed by residues from other subdomains largely play a role in compensating the dynamic movement of W214.
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Affiliation(s)
- Debasish Roy
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Vinod Kumar
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Joel James
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Mohamed Sham Shihabudeen
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Shweta Kulshrestha
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Varun Goel
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
| | - Kavitha Thirumurugan
- 206, Structural Biology Lab, Center for Biomedical Research, Division of Biomedical Sciences, School of Bio Sciences and Technology, VIT University, Vellore-632014, Tamil Nadu, India
- * E-mail:
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Hao J, Zhang Y, Wang X, Yan H, Liu E, Gao X. Interaction between the Natural Components in Danhong Injection (DHI) with Serum Albumin (SA) and the Influence of the Coexisting Multi-Components on the SaB-BSA Binding System: Fluorescence and Molecular Docking Studies. PLoS One 2015; 10:e0128919. [PMID: 26035712 PMCID: PMC4452768 DOI: 10.1371/journal.pone.0128919] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/01/2015] [Indexed: 01/19/2023] Open
Abstract
Danhong injection (DHI) is a widely used Chinese Materia Medica standardized product for the clinical treatment of ischemic encephalopathy and coronary heart disease. The bindings of eight natural components in DHI between bovine serum albumin (BSA) were studied by fluorescence spectroscopy technology and molecular docking. According to the results, the quenching process of salvianolic acid B and hydroxysafflor yellow A was a static quenching procedure through the analysis of quenching data by the Stern-Volmer equation, the modified Stern-Volmer equation, and the modified Scatchard equation. Meanwhile, syringin (Syr) enhanced the fluorescence of BSA, and the data were analyzed using the Lineweaver-Burk equation. Molecular docking suggested that all of these natural components bind to serum albumin at the site I location. Further competitive experiments of SaB confirmed the result of molecular docking studies duo to the displacement of warfarin by SaB. Base on these studies, we selected SaB as a research target because it presented the strongest binding ability to BSA and investigated the influence of the multi-components coexisting in DHI on the interaction between the components of the SaB-BSA binding system. The participation of these natural components in DHI affected the interaction between the components of the SaB-BSA system. Therefore, when DHI is used in mammals, SaB is released from serum albumin more quickly than it is used alone. This work would provide a new experiment basis for revealing the scientific principle of compatibility for Traditional Chinese Medicine.
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Affiliation(s)
- Jia Hao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
| | - Yingyue Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
| | - Xingrui Wang
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
| | - Huo Yan
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
| | - Erwei Liu
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
- * E-mail:
| | - Xiumei Gao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, PR China
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Yuan X, Gu W, Xiao M, Xie W, Wei S, Zhou L, Zhou J, Shen J. Interactions of CT DNA with hexagonal NaYF4 co-doped with Yb(3+)/Tm(3+) upconversion particles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:995-1003. [PMID: 25305602 DOI: 10.1016/j.saa.2014.08.087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 07/30/2014] [Accepted: 08/24/2014] [Indexed: 06/04/2023]
Abstract
The interaction of UCPs with CT DNA are studied in detail by zeta potential, Energy dispersive spectrometer (EDS) spectroscopy, Thermogravimetric (TGA) analysis, DNA melting determination and various spectroscopic techniques including Ultraviolet-Visible (UV-Vis) absorption, fluorescence, circular dichroism (CD), Fourier transform infrared (FTIR) and Raman spectroscopy. The results indicate that CT DNA can assemble on the surface of UCPs mainly by relative stronger hydrophobic force and electrostatic binding, and the predominant interaction site is the deoxyribosyl phosphate backbone of CT DNA. Moreover, after interacting with UCPs, the double helix structure of DNA is undamaged.
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Affiliation(s)
- Xiuxue Yuan
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
| | - Wenchao Gu
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
| | - Mengsi Xiao
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
| | - Wenli Xie
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
| | - Shaohua Wei
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
| | - Lin Zhou
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China.
| | - Jiahong Zhou
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China.
| | - Jian Shen
- College of Chemistry and Materials Science, Analysis and Testing Centre, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, China
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Garcia PF, Toneatto J, Silvero MJ, Argüello GA. Binding of [Cr(phen)3](3+) to transferrin at extracellular and endosomal pHs: potential application in photodynamic therapy. Biochim Biophys Acta Gen Subj 2014; 1840:2695-701. [PMID: 24972167 DOI: 10.1016/j.bbagen.2014.06.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/03/2014] [Accepted: 06/16/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND Transferrin is an iron-binding blood plasma glycoprotein that controls the level of free iron in biological fluids. This protein has been deeply studied in the past few years because of its potential use as a strategy of drug targeting to tumor tissues. Chromium complex, [Cr(phen)3](3+) (phen=1,10-phenanthroline), has been proposed as photosensitizers for photodynamic therapy (PDT). Thus, we analyzed the binding of chromium complex, [Cr(phen)3](3+), to transferrin for a potential delivery of this diimine complex to tumor cells for PDT. METHODS The interaction between [Cr(phen)3](3+) and holotransferrin (holoTf) was studied by fluorescence quenching technique, circular dichroism (CD) and ultraviolet (UV)-visible spectroscopy. RESULTS [Cr(phen)3](3+) binds strongly to holoTf with a binding constant around 10(5)M(-1), that depends on the pH. The thermodynamic parameters indicated that hydrophobic interactions played a major role in the binding processes. The CD studies showed that there are no conformational changes in the secondary and tertiary structures of the protein. CONCLUSIONS These results suggest that the binding process would occur in a site different from the specific iron binding sites of the protein and would be the same in both protein states. As secondary and tertiary structures of transferrin do not show remarkable changes, we propose that the TfR could recognize the holoTf despite having a chromium complex associated. GENERAL SIGNIFICANCE Understanding the interaction between [Cr(phen)3](3+) with transferrin is relevant because this protein could be a delivery agent of Cr(III) complex to tumor cells. This can allow us to understand further the role of Cr(III) complex as sensitizer in PDT.
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Affiliation(s)
- Pablo F Garcia
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET-UNC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Judith Toneatto
- Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental - CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - María Jazmín Silvero
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET-UNC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Gerardo A Argüello
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET-UNC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina.
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Xiao M, Han L, Zhou L, Zhou Y, Huang X, Ge X, Wei S, Zhou J, Wu H, Shen J. Comparison and investigation of bovine hemoglobin binding to dihydroartemisinin and 9-hydroxy-dihydroartemisinin: spectroscopic characterization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:120-125. [PMID: 24531541 DOI: 10.1016/j.saa.2014.01.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/25/2013] [Accepted: 01/08/2014] [Indexed: 06/03/2023]
Abstract
The UV-vis absorption, steady state/time resolved fluorescence spectroscopy and synchronous fluorescence, circular dichroism (CD) spectroscopy are used to investigate the interaction mechanisms of dihydroartemisinin (DHA) and 9-hydroxy-dihydroartemisinin (9-OH DHA), respectively. The UV-vis studies present that DHA and 9-OH DHA can disturb the structure of bovine hemoglobin (BHb). Steady state/time resolved and synchronous fluorescence spectroscopy reveal that the binding constant of DHA with BHb is bigger than 9-OH DHA. CD spectra indicate DHA and 9-OH DHA can change the conformation of BHb. The comparison results suggest that the binding of BHb with DHA is more stable and stronger than 9-OH DHA.
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Affiliation(s)
- Mengsi Xiao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Lina Han
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Lin Zhou
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Yanhuai Zhou
- Department of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Xiaoqin Huang
- Department of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Xuefeng Ge
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Shaohua Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Jiahong Zhou
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China.
| | - Heming Wu
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Nanjing Medical University, No. 136, Hanzhong Avenue, Nanjing, China.
| | - Jian Shen
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Nanjing Normal University, Nanjing 210023, China; Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
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Structural alterations of hemoglobin and myoglobin by glyoxal: A comparative study. Int J Biol Macromol 2014; 66:311-8. [DOI: 10.1016/j.ijbiomac.2014.02.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/02/2014] [Accepted: 02/17/2014] [Indexed: 11/19/2022]
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Xie X, Lü W, Chen X. Binding of the endocrine disruptors 4-tert-octylphenol and 4-nonylphenol to human serum albumin. JOURNAL OF HAZARDOUS MATERIALS 2013; 248-249:347-354. [PMID: 23416871 DOI: 10.1016/j.jhazmat.2013.01.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 01/09/2013] [Accepted: 01/10/2013] [Indexed: 06/01/2023]
Abstract
Alkylphenols, considered to be endocrine disruptor chemicals and toxic environmental priority pollutants, pose great threats to humans with wide exposure from food and other potential sources. In this paper, to evaluate the toxicity of the alkylphenols at the protein level, the effects of 4-tert-octylphenol (OP) and 4-nonylphenol (NP) on human serum albumin (HSA) were characterized by molecular modeling, steady state and time-resolved fluorescence, ultraviolet-visible spectroscopy (UV-vis) and circular dichroism spectroscopy (CD). The enthalpy change (ΔH) and entropy change (ΔS) indicated that hydrophobic forces and hydrogen bonds were the dominant intermolecular forces in the binding of the alkylphenols to HSA. The binding constant of HSA-NP is much greater than that of HSA-OP, revealing that NP, which has a longer carbon chain, has a higher affinity than OP. The alterations of protein secondary structure in the presence of the alkylphenols were confirmed by UV-vis and CD spectroscopy. The time-resolved fluorescence study showed that the lifetimes of tryptophan (Trp) residue of HSA decreased after the addition of the alkylphenols, NP with longer carbon chain impact on the average lifetime of the Trp of HSA more than OP, which consistent with the conclusion drawn from the fluorescence date.
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Affiliation(s)
- XiaoYun Xie
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
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Bose T, Bhattacherjee A, Banerjee S, Chakraborti AS. Methylglyoxal-induced modifications of hemoglobin: structural and functional characteristics. Arch Biochem Biophys 2012; 529:99-104. [PMID: 23232081 DOI: 10.1016/j.abb.2012.12.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/16/2012] [Accepted: 12/01/2012] [Indexed: 01/31/2023]
Abstract
Methylglyoxal (MG) reacts with proteins to form advanced glycation end products (AGEs). Although hemoglobin modification by MG is known, the modified protein is not yet characterized. We have studied the nature of AGE formed by MG on human hemoglobin (HbA(0)) and its effect on structure and function of the protein. After reaction of HbA(0) with MG, the modified protein (MG-Hb) was separated and its properties were compared with those of the unmodified protein HbA(0). As shown by MALDI-mass spectrometry, MG converted Arg-92α and Arg-104β to hydroimidazolones in MG-Hb. Compared to HbA(0), MG-Hb exhibited decreased absorbance around 280nm, reduced tryptophan fluorescence (excitation 285nm) and increased α-helix content. However, MG modification did not change the quaternary structure of the heme protein. MG-Hb appeared to be more thermolabile than HbA(0). The modified protein was found to be more effective than HbA(0) in H(2)O(2)-mediated iron release and oxidative damages involving Fenton reaction. MG-Hb exhibited less peroxidase activity and more esterase activity than HbA(0). MG-induced structural and functional changes of hemoglobin may enhance oxidative stress and associated complications, particularly in diabetes mellitus with increased level of MG.
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Affiliation(s)
- Tania Bose
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta 92, Acharya Prafulla Chandra Road, Kolkata 700 009, India
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Li Y, Wang H, Jia B, Liu C, Liu K, Qi Y, Hu Z. Study of the interaction of deoxynivalenol with human serum albumin by spectroscopic technique and molecular modelling. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2012. [PMID: 23205852 DOI: 10.1080/19440049.2012.742573] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The mechanism of interaction between deoxynivalenol (DON) and human serum albumin (HSA) was studied using spectroscopic methods including fluorescence spectra, UV-VIS, Fourier transform infrared (FT-IR) and circular dichroism (CD). The quenching mechanism was investigated in terms of the association constants, number of binding sites and basic thermodynamic parameters. The distance between the HSA donor and the acceptor DON was 2.80 nm as derived from fluorescence resonance energy transfer. The secondary structure compositions of free HSA and its DON complexes were estimated by the FT-IR spectra. Alteration of the secondary protein structure in the presence of DON was confirmed by UV-VIS and CD spectroscopy. Molecular modelling revealed that a DON-protein complex was stabilised by hydrophobic forces and hydrogen bonding. It was potentially useful for elucidating the toxigenicity of DON when combined with biomolecular function effect, transmembrane transport, toxicological testing and the other experiments.
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Affiliation(s)
- Yuqin Li
- School of Pharmacy, Taishan Medical College, Taian 271016, China.
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Spectroscopic investigation on the interaction of 3,7-dihydroxyflavone with different isomers of human serum albumin. Food Chem 2011; 132:663-70. [PMID: 26434347 DOI: 10.1016/j.foodchem.2011.11.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 09/14/2011] [Accepted: 11/06/2011] [Indexed: 11/19/2022]
Abstract
The interaction mechanism of 3,7-dihydroxyflavone (3,7-diHF) and human serum albumin (HSA) was investigated by fluorescence quenching, fluorescence enhancement, steady-state and time-resolved fluorescence emission and UV-vis absorption spectrometry. The binding site of 3,7-diHF on protein was determined by investigating the spectroscopic properties of 3,7-diHF-HSA complex at pH 7.4 and pH 3.5 individually, and confirmed by the site marker competitive experiments. The binding parameters of 3,7-diHF-HSA complex were estimated by fluorescence quenching experiments, and the data were in good agreement with the results obtained from fluorescence enhancement measurements. A remarkable increase in the fluorescence anisotropy values suggested that 3,7-diHF bound at a motional restricted pocket on HSA. The results indicated that 3,7-diHF, in anionic form, was bound within the hydrophobic pockets of the subdomain IIA of HSA (site I), and stabilised mainly by electrostatic force and ionic interactions. The binding mode of drug-protein was discussed based on above experimental results.
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Toneatto J, Garcia PF, Argüello GA. Advances on the interaction of polypyridyl Cr(III) complexes with transporting proteins and its potential relevance in photodynamic therapy. J Inorg Biochem 2011; 105:1299-305. [DOI: 10.1016/j.jinorgbio.2011.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 06/08/2011] [Accepted: 07/20/2011] [Indexed: 11/25/2022]
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39
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Taheri-Kafrani A, Choiset Y, Faizullin DA, Zuev YF, Bezuglov VV, Chobert JM, Bordbar AK, Haertlé T. Interactions of β-lactoglobulin with serotonin and arachidonyl serotonin. Biopolymers 2011; 95:871-80. [DOI: 10.1002/bip.21690] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 06/09/2011] [Accepted: 06/09/2011] [Indexed: 11/10/2022]
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40
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Zhang C, Zhang R, Na N, Delanghe JR, Ouyang J. Direct monitoring changes of salbutamol concentration in serum by chemiluminescent imaging. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:2089-94. [DOI: 10.1016/j.jchromb.2011.05.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 05/11/2011] [Accepted: 05/25/2011] [Indexed: 10/18/2022]
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41
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Toneatto J, Argüello GA. New advances in the study on the interaction of [Cr(phen)2(dppz)]3+ complex with biological models; association to transporting proteins. J Inorg Biochem 2011; 105:645-51. [PMID: 21450267 DOI: 10.1016/j.jinorgbio.2010.10.018] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Revised: 10/04/2010] [Accepted: 10/08/2010] [Indexed: 10/18/2022]
Abstract
The present study reports a detailed investigation with the interaction of [Cr(phen)(2)(dppz)](3+) with serum albumins, the key protein for the transport of drugs in the blood plasma, which allows us to understand further the role of [Cr(phen)(2)(dppz)](3+) as sensitizer in Photodynamic Therapy (PDT). Chromium(III) complex [Cr(phen)(2)(dppz)](3+), (dppz = dipyridophenazine and phen=1,10-phenanthroline), where dppz is a planar bidentate ligand with an extended π system, has been found to bind strongly with bovine and human serum albumins (BSA and HSA) with an intrinsic binding constants, K(b), of (1.7±0.3)×10(5) M(-1) and (2.2±0.3)×10(5) M(-1) at 295K, respectively. The interactions of serum albumins with [Cr(phen)(2)(dppz)](3+) were assessed employing fluorescence spectroscopy, circular dichroism and UV-vis absorption spectroscopy. The serum albumins-[Cr(phen)(2)(dppz)](3+) interactions caused conformational changes with the loss of helical stability of the protein and local perturbation in the domain IIA binding pocket. The relative fluorescence intensity of the albumin (BSA or HSA) bound to the Cr(III) complex decreased, suggesting that perturbation around the Trp 214 residue took place. The analysis of the thermodynamic parameters ΔG, ΔH, ΔS indicated that the hydrophobic interactions played a major role in both BSA-Cr(III) and HSA-Cr(III) association processes. The binding distances and transfer efficiencies for BSA-Cr(III) and HSA-Cr(III) binding reactions were calculated according to the Föster theory of non-radiation energy transfer. All these experimental results suggests that [Cr(phen)(2)(dppz)](3+) binds to serum albumins, by which these proteins could act as carriers of this complex for further applications in PDT.
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Affiliation(s)
- Judith Toneatto
- INFIQC-CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Sudeshna G, Parimal K. Multiple non-psychiatric effects of phenothiazines: A review. Eur J Pharmacol 2010; 648:6-14. [DOI: 10.1016/j.ejphar.2010.08.045] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Revised: 07/20/2010] [Accepted: 08/25/2010] [Indexed: 01/04/2023]
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Gao W, Li N, Chen Y, Xu Y, Lin Y, Yin Y, Hu Z. Study of interaction between syringin and human serum albumin by multi-spectroscopic method and atomic force microscopy. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.08.042] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Li D, Ji B, Sun H. Probing the binding of 8-Acetyl-7-hydroxycoumarin to human serum albumin by spectroscopic methods and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:35-40. [PMID: 19243988 DOI: 10.1016/j.saa.2009.01.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Revised: 12/17/2008] [Accepted: 01/20/2009] [Indexed: 05/27/2023]
Abstract
Interaction of 8-Acetyl-7-hydroxycoumarin with human serum albumin (HSA) at pH 7.40 has been investigated at 291, 301 and 310 K, respectively, employing the steady fluorescence, circular dichroism (CD) and molecular modeling methods. The quenching mechanism and binding constants were determined by the fluorescence quenching experiments. Thermodynamic data showed that 8-Acetyl-7-hydroxycoumarin was included in the hydrophobic cavity of HSA via hydrophobic interactions. The result of CD indicated that the binding of 8-Acetyl-7-hydroxycoumarin to HSA causes a slight conformational change of the protein. Furthermore, upon binding with HSA, the fluorescence spectra of the 8-Acetyl-7-hydroxycoumarin exhibits appreciable hypsochromic shift associated with an enhancement in the fluorescence intensity. The binding constant (K) and the standard free energy change (DeltaG0) have been also calculated according to the fluorescence data of the ligand, which is in good agreement with the values determined by fluorescence quenching data of HSA. Computational mapping of the possible binding sites of 8-Acetyl-7-hydroxycoumarin revealed that the molecule was bound in the large hydrophobic cavity of subdomain IIA mainly by the hydrophobic interaction and also by the hydrogen bonding interactions between 8-Acetyl-7-hydroxycoumarin and the residues His 242, Arg 222, and Arg 218.
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Affiliation(s)
- Daojin Li
- College of Chemistry & Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
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Zhang G, Guo J, Pan J, Chen X, Wang J. Spectroscopic studies on the interaction of morin–Eu(III) complex with calf thymus DNA. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.02.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Novel binding studies of human serum albumin with trans-feruloyl maslinic acid. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2009; 95:81-8. [PMID: 19230701 DOI: 10.1016/j.jphotobiol.2009.01.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Revised: 12/17/2008] [Accepted: 01/09/2009] [Indexed: 01/09/2023]
Abstract
Human serum albumin (HSA) is a predominant protein in the blood. Most drugs can bind to HSA and be transported to target locations of the body. For this study, we have extracted 3-trans-feruloyl maslinic acid (FMA) from the medicinal plant Tetracera asiatica, its a non-fluorescent derivative have potent anti-cancer, anti-HIV, anti-diabetic, and anti-inflammatory activities. The binding constant of the compound with HSA, calculated from fluorescence data, was found as K(FMA)=1.42+/-0.01 x 10(8) M(-1), which corresponds to 10.9 kcal M(-1) of free energy. Furthermore, microTOF-Q mass spectrometry data showed binding of FMA at nanomolar concentrations of FMA to free HSA. The study detected a mass increase from 66,560 Da (free HSA) to 67,919 Da (HSA+drug). This indicated a strong binding of FMA to HSA, resulting in an increase of the protein's absorbance and fluorescence. The secondary structure of HSA+FMA (0.1 mM) complexes showed the protein secondary structure became partially unfolded upon interaction of FMA with HSA, as well as indicating that HSA-FMA complexes were formed. Docking experiments uncovered the binding mode of FMA in HSA molecule. It was found that FMA binds strongly in different places with hydrogen bonding at IB domain of Arg 114, Leu 115 and Asp 173.
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Subramanyam R, Gollapudi A, Bonigala P, Chinnaboina M, Amooru DG. Betulinic acid binding to human serum albumin: a study of protein conformation and binding affinity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2008; 94:8-12. [PMID: 18945624 DOI: 10.1016/j.jphotobiol.2008.09.002] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 09/03/2008] [Accepted: 09/08/2008] [Indexed: 10/21/2022]
Abstract
Betulinic acid (BA) has anti cancer and anti-HIV activity and has been proved to be therapeutically effective against cancerous and HIV-infected cells. Human serum albumin (HSA) is the predominant protein in the blood. Most drugs that bind to HSA will be transported to other parts of the body. Using micro TOF-Q mass spectrometry, we have shown, for the first time that BA isolated from a plant (Tephrosia calophylla) binds to HSA. The binding constant of BA to HSA was calculated from fluorescence data and found to be K(BA)=1.685+/-0.01 x 10(6) M(-1), indicating a strong binding affinity. The secondary structure of the HSA-BA complex was determined by circular dichroism. The results indicate that the HSA in this complex is partially unfolded. Further, binding of BA at nanomolar concentrations of BA to free HSA was detected using micro TOF-Q mass spectrometry. The study revealed a mass increase from 65199 Da (free HSA) to 65643 Da (HSA+drug), where the additional mass of 444 Da was due to bound BA. Based on the results of this study, it is suggested that micro TOF-Q mass spectrometry is useful technique for drug binding studies.
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Affiliation(s)
- Rajagopal Subramanyam
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India.
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48
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Cheema MA, Taboada P, Barbosa S, Gutiérrez-Pichel M, Castro E, Siddiq M, Mosquera V. Energetics of binding and protein unfolding upon amphiphilic drug complexation with a globular protein in different aqueous media. Colloids Surf B Biointerfaces 2008; 63:217-28. [DOI: 10.1016/j.colsurfb.2007.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Revised: 11/28/2007] [Accepted: 12/01/2007] [Indexed: 11/30/2022]
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49
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Bose T, Chakraborti AS. Fructose-induced structural and functional modifications of hemoglobin: implication for oxidative stress in diabetes mellitus. Biochim Biophys Acta Gen Subj 2008; 1780:800-8. [PMID: 18339326 DOI: 10.1016/j.bbagen.2008.02.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Revised: 01/31/2008] [Accepted: 02/01/2008] [Indexed: 01/23/2023]
Abstract
Increased fructose concentration in diabetes mellitus causes fructation of several proteins. Here we have studied fructose-induced modifications of hemoglobin. We have demonstrated structural changes in fructose-modified hemoglobin (Fr-Hb) by enhanced fluorescence emission with excitation at 285 nm, more surface accessible tryptophan residues by using acrylamide, changes in secondary and tertiary structures by CD spectroscopy, and increased thermolability by using differential scanning calorimetry in comparison with those of normal hemoglobin, HbA(0). Release of iron from hemoglobin is directly related with the extent of fructation. H2O2-induced iron release from Fr-Hb is significantly higher than that from HbA(0). In the presence of H2O2, Fr-Hb degrades arachidonic acid, deoxyribose and plasmid DNA more efficiently than HbA(0), and these processes are significantly inhibited by desferrioxamine or mannitol. Thus increased iron release from Fr-Hb may cause enhanced formation of free radicals and oxidative stress in diabetes. Compared to HbA(0), Fr-Hb exhibits increased carbonyl formation, an index of oxidative modification. Functional modification in Fr-Hb has also been demonstrated by its decreased peroxidase activity and increased esterase activity in comparison with respective HbA(0) activities. Molecular modeling study reveals Lys 7alpha, Lys 127alpha and Lys 66beta to be the probable potential targets for fructation in HbA(0).
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Affiliation(s)
- Tania Bose
- Department of Biophysics, Molecular Biology and Genetics, University College of Science, University of Calcutta, 92, Acharyya Prafulla Chandra Road, Kolkata - 700009, India
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Cheema MA, Taboada P, Barbosa S, Castro E, Siddiq M, Mosquera V. Modification of the Thermal Unfolding Pathways of Myoglobin upon Drug Interaction in Different Aqueous Media. J Phys Chem B 2007; 111:13851-7. [DOI: 10.1021/jp075006q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mohammad Arif Cheema
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Silvia Barbosa
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Emilio Castro
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Mohammad Siddiq
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Víctor Mosquera
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain, and Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
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