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Guo J, Gan C, Cheng B, Cui B, Yi F. Exploration of binding mechanism of apigenin to pepsin: Spectroscopic analysis, molecular docking, enzyme activity and antioxidant assays. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 290:122281. [PMID: 36584639 DOI: 10.1016/j.saa.2022.122281] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 12/07/2022] [Accepted: 12/25/2022] [Indexed: 06/17/2023]
Abstract
Pepsin plays an important role in nutrient metabolism. Apigenin (AP) is a beneficial polyphenol to human health. To enhance the bioavailability of AP and elucidate the inhibitory effect of AP on pepsin, the interaction mechanism of AP with pepsin was investigated using spectroscopic analysis and molecular docking, and the activity of pepsin and antioxidant activity of AP was also evaluated. Specifically, AP performed static quenching of pepsin and had only one binding site on pepsin. More interestingly, the interaction between AP and pepsin was spontaneous, while hydrogen bonds and van der Waals forces were the main binding forces. Generally, synchronous and three-dimensional fluorescence confirmed that AP induced the conformational changes of pepsin, and molecular docking proved the above results and illustrated the specific binding patterns. Specifically, AP inhibited the activity of pepsin, while pepsin decreased the antioxidant activity of AP. These results provided useful information for elucidating the interactions between AP and pepsin.
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Affiliation(s)
- Jinying Guo
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, PR China.
| | - Chuanfa Gan
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, PR China
| | - Bo Cheng
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, PR China
| | - Bo Cui
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, PR China
| | - Fankai Yi
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, PR China
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2
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Interaction of esomeprazole with insulin detemir and human albumin: A potential cause of hypoglycemia. Biophys Chem 2022; 285:106809. [DOI: 10.1016/j.bpc.2022.106809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/03/2022] [Accepted: 03/24/2022] [Indexed: 11/17/2022]
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3
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Zhang S, Sheng Y, Feng Y, Diao J, Wang C, Zhang D. Changes in structural and functional properties of globulin–polyphenol complexes in mung beans: exploration under different interaction ratios and heat treatment conditions. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15180] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Shu Zhang
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
- Chinese National Engineering Research Center Daqing 163319 China
| | - Ya‐Nan Sheng
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
| | - Yu‐Chao Feng
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
| | - Jing‐Jing Diao
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
- Chinese National Engineering Research Center Daqing 163319 China
| | - Chang‐Yuan Wang
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
- Chinese National Engineering Research Center Daqing 163319 China
| | - Dong‐Jie Zhang
- College of Food Heilongjiang Bayi Agricultural University Xinfeng Lu 5 Daqing 163319 China
- Chinese National Engineering Research Center Daqing 163319 China
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4
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Fan Y, Tao Y, Liu G, Wang M, Wang S, Li L. Interaction study of engeletin toward cytochrome P450 3A4 and 2D6 by multi-spectroscopy and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120311. [PMID: 34481255 DOI: 10.1016/j.saa.2021.120311] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 08/19/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
The inhibitory effects of engeletin on the activities of human cytochrome P450 3A4 and 2D6 (CYP3A4 and CYP2D6) were investigated by enzyme kinetics, multi-spectroscopy and molecular docking. Engeletin was found to strongly inhibit CYP3A4 and CYP2D6, with the IC50 of 1.32 μM and 2.87 μM, respectively. The inhibition modes of engeletin against CYP3A4 and CYP2D6 were a competitive type and a mixed type, respectively. The fluorescence of the two CYPs was quenched statically by engeletin, which was bound to CYP3A4 stronger than to CYP2D6 at the same temperature. Circular dichroism spectroscopy, three-dimensional fluorescence, ultraviolet-visible spectroscopy and synchronous fluorescence confirmed that the conformation and micro-environment of the two CYPs protein were changed after binding with engeletin. Molecular docking, ultraviolet-visible spectroscopy and the fluorescence data revealed that engeletin had strong binding affinity to the two CYPs through hydrogen and van der Waals forces. The findings here suggested that engeletin may cause the herb-drug interactions for its inhibition of CYP3A4 and CYP2D6 activities.
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Affiliation(s)
- Yangyang Fan
- The College of Chemistry, Changchun Normal University, Changchun 130032,China
| | - Yanzhou Tao
- The College of Chemistry, Changchun Normal University, Changchun 130032,China
| | - Guiming Liu
- The College of Chemistry, Changchun Normal University, Changchun 130032,China
| | - Meizi Wang
- The College of Chemistry, Changchun Normal University, Changchun 130032,China
| | - Suqing Wang
- The College of Chemistry, Changchun Normal University, Changchun 130032,China
| | - Li Li
- The College of Chemistry, Changchun Normal University, Changchun 130032,China.
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Papp LA, Hancu G, Kelemen H, Tóth G. Chiral separation in the class of proton pump inhibitors by chromatographic and electromigration techniques: An overview. Electrophoresis 2021; 42:1761-1789. [PMID: 34004039 DOI: 10.1002/elps.202100032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/27/2021] [Accepted: 05/05/2021] [Indexed: 11/08/2022]
Abstract
Proton pump inhibitors (PPIs) are benzimidazole-derivative chiral sulfoxides, frequently used in the treatment of gastric hyperacidity-related disorders. Due to their stereoselective metabolism, the eutomeric forms of PPIs can present a more advantageous pharmacokinetic profile by comparison with the distomers or racemates. Moreover, two representatives of the class are used in therapy both as racemates and as pure enantiomers (esomeprazole, dexlansoprazole). A relatively large number of enantioseparation methods employed for the stereoselective determination of PPIs from pharmaceutical, biological, and environmental matrices were published in the past three decades. The purpose of the current overview is to provide a systematic survey of the available chiral separation methods published since the introduction of PPIs in the therapy up to the present. Analytical and bioanalytical methods using different chromatographic and electromigration techniques reported for the enantioseparation of omeprazole, lansoprazole, pantoprazole, rabeprazole, ilaprazole, and tenatoprazole are included. The analytical conditions of the presented methods are summarized in three comprehensive tables, while a critical discussion of the applied techniques, possible mechanism of enantiorecognition, and future perspectives on the topic are also presented.
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Affiliation(s)
- Lajos Attila Papp
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Gabriel Hancu
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Hajnal Kelemen
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
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Li X, Gao S, Zhang N, Zhang M, Wang R, Chang J. Identification of tectoridin as the inhibitor of FTO by isothermal titration calorimetric and spectroscopic methods. NEW J CHEM 2021. [DOI: 10.1039/d1nj00117e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The characteristics of binding between tectoridin and the fat mass and obesity-associated protein were investigated.
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Affiliation(s)
- Xitong Li
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Shuting Gao
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Ning Zhang
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Miao Zhang
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Ruiyong Wang
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Junbiao Chang
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
- College of Chemistry and Chemical Engineering
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Liu D, Cao X, Kong Y, Mu T, Liu J. Inhibitory mechanism of sinensetin on α-glucosidase and non-enzymatic glycation: Insights from spectroscopy and molecular docking analyses. Int J Biol Macromol 2020; 166:259-267. [PMID: 33115652 DOI: 10.1016/j.ijbiomac.2020.10.174] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/03/2020] [Accepted: 10/21/2020] [Indexed: 01/06/2023]
Abstract
Inhibition of α-glucosidase and non-enzymatic glycation is regarded as an effective method to prevent and treat type 2 diabetes and its complications. In this study, the inhibition of sinensetin on α-glucosidase and non-enzymatic glycation was studied with multi-spectroscopic techniques and molecular docking analysis. The results of fluorescence spectroscopy analysis indicated that sinensetin quenched the endogenous fluorescence of α-glucosidase in static manner. The binding of sinensetin with α-glucosidase was a spontaneous process primarily driven by hydrophobic interaction. At 298 K, the binding constant was (5.70 ± 0.12) × 104 L·mol-1 and the binding site number was 1. The conformation of α-glucosidase was altered by sinensetin, which was revealed by circular dichroism (CD), FTIR spectra, synchronous fluorescence and three-dimensional (3D) fluorescence spectroscopy methods. Molecular docking analysis demonstrated that sinensetin interacted with the amino acid residues of α-glucosidase, which might prevent the entrance of substrate, leading to the decrease of catalytic efficiency of α-glucosidase. Furthermore, glycation assays showed that sinensetin stabilized the structure of bovine serum albumins (BSA), interacted with BSA, strongly inhibited the formation of dityrosine, N'-formylkynurenine and advanced glycation end products (AGEs). This study provided useful information concerning sinensetin preventing and treating type 2 diabetes and its related complications.
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Affiliation(s)
- Dan Liu
- Department of Biological Sciences, School of Life Science, Liaoning University, Shenyang 110036, PR China
| | - Xiangyu Cao
- Department of Biological Sciences, School of Life Science, Liaoning University, Shenyang 110036, PR China
| | - Yuchi Kong
- Department of Biological Sciences, School of Life Science, Liaoning University, Shenyang 110036, PR China
| | - Teng Mu
- Department of Biological Sciences, School of Life Science, Liaoning University, Shenyang 110036, PR China
| | - Jianli Liu
- Department of Biological Sciences, School of Life Science, Liaoning University, Shenyang 110036, PR China.
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8
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Binding of omeprazole to protein targets identified by monoclonal antibodies. PLoS One 2020; 15:e0239464. [PMID: 32946534 PMCID: PMC7500594 DOI: 10.1371/journal.pone.0239464] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023] Open
Abstract
Omeprazole is the most commonly used proton pump inhibitor (PPI), a class of medications whose therapeutic mechanism of action involves formation of a disulfide linkage to cysteine residues in the H+/K+ ATPase pump on gastric secretory cells. Covalent linkage between the sole sulfur group of omeprazole and selected cysteine residues of the pump protein results in inhibition of acid secretion in the stomach, an effect that ameliorates gastroesophageal reflux and peptic ulcer disease. PPIs, though useful for specific conditions when used transiently, are associated with diverse untoward effects when used long term. The mechanisms underlying these potential off-target effects remain unclear. PPIs may, in fact, interact with non-canonical target proteins (non-pump molecules) resulting in unexpected pathophysiological effects, but few studies describe off-target PPI binding. Here, we describe successful cloning of monoclonal antibodies against protein-bound omeprazole. We developed and used monoclonal antibodies to characterize the protein target range of omeprazole, stability of omeprazole-bound proteins, and the involvement of cysteines in binding of omeprazole to targets. We demonstrate that a wide range of diverse proteins are targeted by omeprazole. Protein complexes, detected by Western blotting, are resistant to heat, detergents, and reducing agents. Reaction of omeprazole occurs with cysteine-free proteins, is not fully inhibited by cysteine alkylation, occurs at neutral pH, and induces protein multimerization. At least two other clinically used PPIs, rabeprazole and tenatoprazole, are capable of binding to proteins in a similar fashion. We conclude that omeprazole binds to multiple proteins and is capable of forming highly stable complexes that are not dependent on disulfide linkages between the drug and protein targets. Further studies made possible by these antibodies may shed light on whether PPI-protein complexes underlie off-target untoward effects of chronic PPI use.
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Roslan AA, Mohamad SB, Tayyab S. Docking Evaluation of the Interaction Between Green Tea Active Ingredient, l-Theanine and Human Serum Albumin. NATIONAL ACADEMY SCIENCE LETTERS 2020. [DOI: 10.1007/s40009-020-00949-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Carvalho Bertozo L, Fernandes AJFC, Yoguim MI, Bolean M, Ciancaglini P, Ximenes VF. Entropy‐driven binding of octyl gallate in albumin: Failure in the application of temperature effect to distinguish dynamic and static fluorescence quenching. J Mol Recognit 2020; 33:e2840. [DOI: 10.1002/jmr.2840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/25/2020] [Accepted: 02/10/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Luiza Carvalho Bertozo
- Department of Chemistry, Faculty of SciencesUNESP—São Paulo State University São Paulo Brazil
| | - Ana J. F. C. Fernandes
- Department of Chemistry, Faculty of SciencesUNESP—São Paulo State University São Paulo Brazil
| | - Maurício I. Yoguim
- Department of Chemistry, Faculty of SciencesUNESP—São Paulo State University São Paulo Brazil
| | - Maytê Bolean
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters at Ribeirão PretoUniversity of São Paulo Ribeirão Preto SP Brazil
| | - Pietro Ciancaglini
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters at Ribeirão PretoUniversity of São Paulo Ribeirão Preto SP Brazil
| | - Valdecir F. Ximenes
- Department of Chemistry, Faculty of SciencesUNESP—São Paulo State University São Paulo Brazil
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11
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Molecular docking and muiltple spectroscopy investigation on the binding characteristics of aloe-emodin to pepsin. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.084] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Khan M, Husain Q. Safeguarding the catalytic activity and stability of polyaniline chitosan silver nanocomposite bound beta-galactosidase against product inhibitors and structurally related compound. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1075-1084. [DOI: 10.1080/21691401.2019.1593189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Maryam Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, U.P., India
| | - Qayyum Husain
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, U.P., India
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Probing the influence of food colorant on digestive ability: sunset yellow-pepsin system. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-019-2359-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Effects of Plasma Albumin on the Pharmacokinetics of Esomeprazole in ICU Patients. BIOMED RESEARCH INTERNATIONAL 2019; 2018:6374374. [PMID: 30643812 PMCID: PMC6311297 DOI: 10.1155/2018/6374374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/28/2018] [Accepted: 11/26/2018] [Indexed: 11/18/2022]
Abstract
Objectives To evaluate the effects of plasma albumin on pharmacokinetics of esomeprazole in ICU patients. Methods This study was performed in 32 consecutive intensive care unit (ICU) patients. They were divided into two groups according to the plasma albumin levels. Nineteen patients with low plasma albumin levels (<30 g/L; male/female, 12/7) were assigned to low plasma albumin group (LPAG). Thirteen patients with plasma albumin levels >30 g/L (male/female, 9/4) were assigned to high plasma albumin group (HPAG). All patients were received intravenous (IV) of 40 mg esomeprazole in 5 min. Blood samples were collected via basilic vein at different time points and concentrations of esomeprazole were determined by UPLC-MS/MS. Results MRT(0-∞), t1/2, V, CL, and Cmax between two groups were significantly difference (P<0.05). Compared with HPAG, MRT(0-∞), t1/2, and V of esomeprazole in LPAG were increased by 1.42-fold, 1.49-fold, and 1.24-fold, respectively; the maximum drug concentration of esomeprazole in LPAG was decreased to 82.5%. AUC(0-∞) of LPAG was 1.23 times than that of group B. CL in LPAG was 80% of HPAG. There was no statistical difference between the two groups of AUC(0-∞) and CL. Conclusions Some pharmacokinetic parameters of esomeprazole may be changed in ICU patients with low plasma albumin.
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Sharma A, Kumar V, Pratap S, Kumar P. The inhibitory and binding studies of methyl-sulfone hydroxamate based inhibitors against LpxC from drug resistant Moraxella catarrhalis using biophysical, biochemical and in silico approaches. Int J Biol Macromol 2018; 118:1747-1762. [DOI: 10.1016/j.ijbiomac.2018.07.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/06/2018] [Accepted: 07/07/2018] [Indexed: 01/17/2023]
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Lammers LA, Achterbergh R, Romijn JA, Mathôt RAA. Short-Term Fasting Alters Pharmacokinetics of Cytochrome P450 Probe Drugs: Does Protein Binding Play a Role? Eur J Drug Metab Pharmacokinet 2018; 43:251-257. [PMID: 28929443 PMCID: PMC5854751 DOI: 10.1007/s13318-017-0437-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Background and Objectives Short-term fasting differentially alters cytochrome P450 (CYP) mediated drug metabolism. This has been established by using CYP-enzyme selective probe drugs. However, the observed effects of fasting on the pharmacokinetics of these probe drugs may also include the effects of altered plasma protein binding of these drugs. Therefore, we studied the effect of short-term fasting on protein binding of five commonly used probe drugs [caffeine (CYP1A2), metoprolol (CYP2D6), midazolam (CYP3A4), omeprazole (CYP2C19) and S-warfarin (CYP2C9)]. Methods The free and total plasma concentrations of the five probe drugs were analyzed by LC–MS/MS in samples retrieved in a cross-over study in which nine healthy subjects received an intravenous administration of the cocktail after an overnight fast (control) and after 36 h of fasting. Results Short-term fasting increased plasma free fatty acid concentrations from 0.48 mmol/L (control) to 1.29 mmol/L (36 h fasting) (p = 0.012). Short-term fasting did not alter the free fractions of caffeine, metoprolol and omeprazole compared to the control intervention (p > 0.05). Power to detect a difference for midazolam and S-warfarin was low since the majority of free concentrations were below the limit of quantification. Conclusions This study demonstrates that short-term fasting does not alter protein binding of the probe drugs caffeine, metoprolol and omeprazole. Electronic supplementary material The online version of this article (doi:10.1007/s13318-017-0437-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Laureen A Lammers
- Department of Hospital Pharmacy, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Roos Achterbergh
- Department of Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Johannes A Romijn
- Department of Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Ron A A Mathôt
- Department of Hospital Pharmacy, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
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Tanzadehpanah H, Mahaki H, Moghadam NH, Salehzadeh S, Rajabi O, Najafi R, Amini R, Saidijam M. Binding site identification of anticancer drug gefitinib to HSA and DNA in the presence of five different probes. J Biomol Struct Dyn 2018; 37:823-836. [DOI: 10.1080/07391102.2018.1441073] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hamid Tanzadehpanah
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hanie Mahaki
- Department of Immunology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | | | - Omid Rajabi
- Medical Chemistry Department, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Rezvan Najafi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Razieh Amini
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Massoud Saidijam
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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18
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Fang Q, Guo C, Wang Y, Liu Y. The study on interactions between levofloxacin and model proteins by using multi-spectroscopic and molecular docking methods. J Biomol Struct Dyn 2017; 36:2032-2044. [PMID: 28604271 DOI: 10.1080/07391102.2017.1341335] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The interactions of levofloxacin (LEV) with lysozyme (LYZ), trypsin and bovine hemoglobin (BHb) were investigated, respectively, by using multi-spectral techniques and molecular docking in vitro. Fluorescence studies showed that LEV quenched LYZ/trypsin fluorescence in a combined quenching ways and BHb fluorescence in a static quenching with binding constants of .14, .51 and .20 × 105 L mol-1 at 298 K, respectively. The thermodynamic parameters demonstrated that hydrophobic forces, hydrogen bonds, and van der Waals forces played the major role in the binding process. The binding distances between LEV and the inner tryptophan residues of LYZ, trypsin, and BHb were calculated to be 4.04, 3.38, and 4.52 nm, respectively. Furthermore, the results of circular dichroism spectra (CD), UV-vis, and three-dimensional fluorescence spectra indicated that the secondary structures of LYZ, trypsin, and BHb were partially changed by LEV with the α-helix percentage of LYZ-LEV system increased while that of BHb-LEV system was decreased, the β-sheet percentage of trypsin-LEV system increased from 41.3 to 42.9%. UV-vis spectral results showed that the binding interactions could cause conformational and some micro-environmental changes of LYZ, trypsin, and BHb. The results of molecular docking revealed that in LYZ and trypsin systems, LEV bound to the active sites residues GLU 35 and ASP 52 of LYZ and trypsin at the active site SER 195, and in BHb system, LEV was located in the central cavity, which was consistent with the results of synchronous fluorescence experiment. Besides, LEV made the activity of LYZ decrease while the activity of trypsin increased.
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Affiliation(s)
- Qing Fang
- a College of Life and Environmental Sciences, Minzu University of China , Beijing 100081 , China
| | - Chenhui Guo
- a College of Life and Environmental Sciences, Minzu University of China , Beijing 100081 , China
| | - Yirun Wang
- a College of Life and Environmental Sciences, Minzu University of China , Beijing 100081 , China
| | - Ying Liu
- a College of Life and Environmental Sciences, Minzu University of China , Beijing 100081 , China.,b Beijing Engineering Research Center of Food Environment and Public Health, Minzu University of China , Beijing 100081 , China
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Spanidis Y, Priftis A, Stagos D, Stravodimos GA, Leonidas DD, Spandidos DA, Tsatsakis AM, Kouretas D. Oxidation of human serum albumin exhibits inter-individual variability after an ultra-marathon mountain race. Exp Ther Med 2017; 13:2382-2390. [PMID: 28565852 PMCID: PMC5443265 DOI: 10.3892/etm.2017.4268] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 03/14/2017] [Indexed: 11/07/2022] Open
Abstract
The aim of this study was to examine the oxidation of human serum albumin (HSA) caused by oxidative stress following exhaustive and demanding exercise, such as an ultra-marathon race. For this purpose, blood samples from 12 adult runners who underwent a 103 km mountain ultra-marathon race were collected before the race, and also at 24, 48 and 72 h post-race. HSA was partially purified using affinity chromatography and consequently subjected to western blot analysis in order to determine the levels of disulfide dimers indicating oxidation. For reasons of comparison, the results were correlated with those from a previous study, in which the same samples were analyzed using different oxidative stress markers. The results revealed a good correlation between albumin dimers and protein carbonyls at all time points, while there was also a significant correlation with static oxidation reduction potential at 24 h, and a negative correlation with capacity oxidation reduction potential at 24 and 48 h. In addition, an individual analysis of albumin dimers exhibited great inter-individual differences, indicating the variation of HSA oxidation between different athletes. Namely, in some athletes, HSA seemed to be the main oxidation target of serum proteins, while in other athletes, there was even a reduction of HSA. This inter-individual variability in the oxidation of HSA may suggest that different interventions (e.g., through diet) may be required in order to confront the effects on athletes following strenuous exercise. On the whole, this study suggests the importance of the assessment of albumin dimers as a predictive marker for exercise-induced oxidative stress.
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Affiliation(s)
- Ypatios Spanidis
- Laboratory of Animal Physiology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
| | - Alexandros Priftis
- Laboratory of Animal Physiology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
| | - Dimitrios Stagos
- Laboratory of Animal Physiology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
| | - George A Stravodimos
- Laboratory of Structural and Functional Biochemistry, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
| | - Demetres D Leonidas
- Laboratory of Structural and Functional Biochemistry, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
| | - Demetrios A Spandidos
- Laboratory of Clinical Virology, University of Crete, Medical School, Heraklion 71409, Greece
| | - Aristides M Tsatsakis
- Department of Forensic Sciences and Toxicology, Medical School, University of Crete, Heraklion 71003, Greece
| | - Demetrios Kouretas
- Laboratory of Animal Physiology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41500, Greece
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