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Chen K, Zhang Q, Yang S, Zhang S, Chen G. Comparative Study on the Impact of Different Extraction Technologies on Structural Characteristics, Physicochemical Properties, and Biological Activities of Polysaccharides from Seedless Chestnut Rose ( Rosa sterilis) Fruit. Foods 2024; 13:772. [PMID: 38472885 DOI: 10.3390/foods13050772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/18/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Seedless chestnut rose (Rosa sterilis S. D. Shi, RS) is a fresh type of R. roxburghii Tratt with copious functional components in its fruit. Polysaccharides are recognized as one of the vital bioactive compounds in RS fruits, but their antioxidant and hypoglycemic properties have not been extensively explored. Hence, in this study, accelerated solvent extraction (RSP-W), citric acid (RSP-C), 5% sodium hydroxide/0.05% sodium borohydride (RSP-A), and 0.9% sodium chloride (RSP-S) solution extraction were individually utilized to obtain RS fruit polysaccharides. The physicochemical properties, structural characteristics, and biological activities were then compared. Results indicated that extraction methods had significant influences on the extraction yield, uronic acid content, monosaccharide composition, molecular weight, particle size, thermal stability, triple-helical structure, and surface morphology of RSPs apart from the major linkage bands and crystalline characteristics. The bioactivity tests showed that the RSP-S, which had the greatest amount of uronic acid and a comparatively lower molecular weight, exhibited more potent antioxidant and α-glucosidase inhibitory property. Furthermore, all RSPs inhibited α-glucosidase through a mixed-type manner and quenched their fluorescence predominantly via a static quenching mechanism, with RSP-S showing the highest binding efficiency. Our findings provide a theoretical basis for utilizing RSPs as functional ingredients in food industries.
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Affiliation(s)
- Kaiwen Chen
- College of Food Science and Engineering, Guiyang University, 130 Jianlongdong Road, Nanming District, Guiyang 550005, China
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Qiuqiu Zhang
- College of Food Science and Engineering, Guiyang University, 130 Jianlongdong Road, Nanming District, Guiyang 550005, China
| | - Shengzhen Yang
- College of Food Science and Engineering, Guiyang University, 130 Jianlongdong Road, Nanming District, Guiyang 550005, China
| | - Shengyan Zhang
- College of Food Science and Engineering, Guiyang University, 130 Jianlongdong Road, Nanming District, Guiyang 550005, China
| | - Guangjing Chen
- College of Food Science and Engineering, Guiyang University, 130 Jianlongdong Road, Nanming District, Guiyang 550005, China
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2
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Zhang K, Tian X, Shen R, Wang Y, Zhang Y, Wang W. Inhibition of α-amylase and amyloglucosidase by cellulose nanofibrils with different surface charge and spectroscopic analysis of their interaction mechanism. Food Res Int 2023; 170:113053. [PMID: 37316033 DOI: 10.1016/j.foodres.2023.113053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/16/2023]
Abstract
We investigated the inhibition effect of carboxymethylated cellulose nanofibrils with four different surface chargeon α-amylase and amyloglucosidase via enzyme activity inhibition assay, fluorescence spectra and secondary structure change analysis. These results revealed that cellulose nanofibril with lowest surface charge displayed the greatest inhibition effects against α-amylase (9.81 mg/mL) and amyloglucosidase (13.16 mg/mL). All cellulose nanofibrils in starch model significantly (p < 0.05) inhibited the starch digestion, where the inhibition effect was negatively correlated with the magnitude of particle surface charge. Cellulose nanofibrils could bind α-amylase or amyloglucosidase to form new complex in the manner of static quenching. The thermodynamic parameters demonstrated that the cellulose nanofibrils-starch hydrolase (α-amylase or amyloglucosidase) complexes were formed spontaneously via hydrophobic effects. Additionally, Fourier transform Infrared spectra exhibited the changes in the fraction of secondary structures of starch hydrolase after the interactions with carboxymethylated cellulose nanofibrils. These data provide a convenient and simple method tailor gastrointestinal digestion of starch by changing cellulose surface charge, to control postprandial serum glucose upsurge.
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Affiliation(s)
- Kai Zhang
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Xiaojing Tian
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China.
| | - Ruixi Shen
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Yang Wang
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Yafei Zhang
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Wenhang Wang
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China.
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3
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Liu K, Chen Y, Yang Z, Jin J. Preparation and characterization of CS/γ-PGA/PC complex nanoparticles for insulin oral delivery. Colloid Polym Sci 2023. [DOI: 10.1007/s00396-023-05078-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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4
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Xiao Q, Luo H, Cao H, Li B, Liu J, Liu Y, Huang S. Investigation on conformational variation and enzymatic activity of trypsin affected by Ti 3C 2 QDs via spectroscopic technique and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121878. [PMID: 36183537 DOI: 10.1016/j.saa.2022.121878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/01/2022] [Accepted: 09/10/2022] [Indexed: 06/16/2023]
Abstract
In this paper, Ti3C2 quantum dots (Ti3C2 QDs) were synthesized by simply treating Ti3C2 MXene powder with acid and base via hydrothermal method. Ti3C2 QDs exhibited superior fluorescence property and were used for the fluorescent imaging of living HeLa cells successfully. In order to evaluate the influence of Ti3C2 QDs on protease with specific biological functions, binding interaction of Ti3C2 QDs with trypsin was studied comprehensively and deeply through spectroscopic strategies and molecular modeling technique. The intrinsic fluorescence of trypsin was spontaneously quenched by Ti3C2 QDs through static quenching mode under van der Waals interaction force, and Ti3C2 QDs bound with the inactive residue domain of trypsin firmly with stoichiometric ratio of 1:1. Ti3C2 QDs induced the microenvironmental variation of the amino acid residues in trypsin, reducing the thermal stability of trypsin significantly. Gel electrophoresis experiments and microscopic imaging experiments demonstrated that Ti3C2 QDs inhibited the enzymatic activity of trypsin on the digestion of human serum albumin and HeLa cells obviously. These results revealed not only the deep interaction mechanism between Ti3C2 QDs and protease but also the influence of Ti3C2 QDs on the enzymatic activity of trypsin, paving the way for the safe biological application of Ti3C2 QDs in the diagnosis and the therapy of protease-related diseases.
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Affiliation(s)
- Qi Xiao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
| | - Huajian Luo
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Huishan Cao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Bo Li
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Jiajia Liu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Yi Liu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China; State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300378, PR China
| | - Shan Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
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Wen Y, Zhou X, Huo D, Chen J, Weng L, Li B, Wu Z, Zhang X, Li L. Optimization for the extraction of polysaccharides from Huidouba and their in vitro α-glucosidase inhibition mechanism. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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The inhibitory kinetics and mechanism of quercetin-3-O-rhamnoside and chlorogenic acid derived from Smilax china L. EtOAc fraction on xanthine oxidase. Int J Biol Macromol 2022; 213:447-455. [PMID: 35660039 DOI: 10.1016/j.ijbiomac.2022.05.188] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/19/2022] [Accepted: 05/30/2022] [Indexed: 01/13/2023]
Abstract
Smilax china L. showed various biological activities mainly due to its phenolic components; however, the mechanism of isolated phenolic fraction against xanthine oxidase (XO) has not been investigated. Quercetin-3-O-rhamnoside (QORh) and chlorogenic acid (CGA) extracted from Smilax china L. ethyl acetate fraction was analyzed for its XO inhibitory kinetics and mechanism using multispectroscopic methods and molecular docking techniques. QORh and CGA reversibly inhibited XO activity in competitive and non-competitive modes, respectively. The bioactive compounds bound with XO were dominated mainly by hydrogen bonds and van der Waals forces to form QORh-XO, and CGA-XO complexes with one affinity binding site. The synchronous fluorescence, circular dichroism, three-dimensional (3D) fluorescence, and Fourier transform infrared spectra exhibited that XO binding with QORh or CGA leads to the secondary and tertiary structural variation of the protein. Additionally, molecular docking further revealed that QORh binds to the active site of XO and forms hydrogen coupling with amino acid residues. The results showed that QORh and CGA had inhibitory activity on XO, which might be further used to modify the bioactive compounds and improve their efficacy to treat gout.
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Morzel M, Canon F, Guyot S. Interactions between Salivary Proteins and Dietary Polyphenols: Potential Consequences on Gastrointestinal Digestive Events. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6317-6327. [PMID: 35583948 DOI: 10.1021/acs.jafc.2c01183] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present review documents the current knowledge and hypotheses on how polyphenols-saliva interactions may modulate the bioaccessibility or bioavailability of nutrients and highlights research prospects in the field. After an updated description of the different classes of dietary polyphenols and their modifications by food processing or digestion, an overview of interactions between salivary proteins and polyphenols (with an emphasis on tannins) is provided. In vitro studies show that the solubility of salivary protein-tannin complexes in gastric conditions depends on the degree of tannin polymerization, while complexes are partly solubilized by bile salts. Salivary proteins-polyphenols interactions may affect digestive processes. For example, polyphenols can bind to and inhibit salivary amylase, with downstream consequences on starch digestion. Some salivary proteins (PRPs) prevent tannin-induced reduced protein digestibility, probably through binding tannins before they interact with digestive proteases. Salivary proteins may also act as scavenger molecules to limit the intestinal uptake of tannins.
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Affiliation(s)
| | - Francis Canon
- Centre des Sciences du Goût et de l'Alimentation, UMR 1324 INRAE, UMR 6265 CNRS, Université de Bourgogne Franche-Comté, F-21000 Dijon, France
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Wang Y, Xie Y, Wang A, Wang J, Wu X, Wu Y, Fu Y, Sun H. Insights into interactions between food polyphenols and proteins: an updated overview. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Wang
- College of Chemistry and Chemical Engineering, Key Laboratory of Drug Design Huangshan University Huangshan China
| | - Yang Xie
- Pharmaceutical Engineering Center Chongqing Medical and Pharmaceutical College Chongqing China
| | - Aidong Wang
- College of Chemistry and Chemical Engineering, Key Laboratory of Drug Design Huangshan University Huangshan China
| | - Jianhua Wang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering Chongqing University Chongqing China
| | - Xiaoran Wu
- College of Chemistry and Chemical Engineering, Key Laboratory of Drug Design Huangshan University Huangshan China
| | - Yan Wu
- College of Chemistry and Chemical Engineering, Key Laboratory of Drug Design Huangshan University Huangshan China
| | - Yuna Fu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering Chongqing University Chongqing China
| | - Heng Sun
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering Chongqing University Chongqing China
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Du H, Li SJ. Inhibition of porphyra polysaccharide on xanthine oxidase activity and its inhibition mechanism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 266:120446. [PMID: 34628362 DOI: 10.1016/j.saa.2021.120446] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/18/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Xanthine oxidase (XO) is a purine catabolic enzyme related to hyperuricemia and gout. Porphyra polysaccharide (PP) is a kind of sulfated polysaccharide with potent biological activity. Herein, the interaction mechanism between PP and XO was studied by enzyme kinetics and multi-spectroscopy methods for the first time. Inhibition kinetics assay showed that PP reversibly inhibited XO activity in a mixed competitive manner with an IC50 of 10.53 ± 0.69 mg/ml. Fluorescence titration studies and thermodynamic parameter calculations revealed that PP could spontaneously bind to XO through hydrophobic interactions, with a class of binding site. Circular dichroism analysis demonstrated that PP induced secondary structure rearrangement and conformational change of XO. Molecular docking further revealed that PP inserted into the hydrophobic cavity of XO, occupying the catalytic center, leading to the inhibition of XO activity. This study may provide new insights into the inhibitory mechanism of PP as a promising XO inhibitor.
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Affiliation(s)
- Hongyan Du
- Department of Biophysics, School of Physical Science, The Key Laboratory of Bioactive Materials, Ministry of Education, Nankai University, Tianjin 300071, PR China
| | - Shu Jie Li
- Department of Biophysics, School of Physical Science, The Key Laboratory of Bioactive Materials, Ministry of Education, Nankai University, Tianjin 300071, PR China; Qilu Institute of Technology, Shandong 250200, PR China.
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10
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Luo H, Li H, Liu Y, Yang L, Xiao Q, Huang S. Investigation on conformational variation and activity of trypsin affected by black phosphorus quantum dots via multi-spectroscopy and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 256:119746. [PMID: 33819763 DOI: 10.1016/j.saa.2021.119746] [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: 01/05/2021] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
Binding interaction between black phosphorus quantum dots (BPQDs) and trypsin was researched deeply to illustrate the variations on conformation and activity of trypsin affected by BPQDs via multi-spectroscopy and molecular modeling. Experimental results implied that inherent fluorescence of trypsin was quenched by BPQDs via static fluorescence quenching mode. BPQDs bound with trypsin to construct ground-state complex under the binding forces of van der Waal interaction and hydrophobic interaction, resulting in the conformational change of trypsin to be more hydrophilic and incompact. The result of molecular modeling indicated that BPQDs interacted with trypsin at its allosteric site and inhibited the activity of trypsin via non-competitive manner. Finally, BPQDs efficiently inhibited the digestion activity of trypsin on human serum albumin, human cervical carcinoma HeLa cells, and human lung adenocarcinoma A549 cells. This work not only explores the in-depth understanding on the influence of BPQDs on proteinases but also paves the way for further application of BPQDs on human beings for diseases treatments.
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Affiliation(s)
- Huajian Luo
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Haimei Li
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Yi Liu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Liyun Yang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Qi Xiao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
| | - Shan Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
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11
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Xiao Q, Liang J, Luo H, Li H, Yang J, Huang S. Investigations of conformational structures and activities of trypsin and pepsin affected by food colourant allura red. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114359] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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12
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Zhao L, Zhou A, Liu Z, Xiao J, Wang Y, Cao Y, Wang L. Inhibitory mechanism of lactoferrin on antibacterial activity of oenothein B: isothermal titration calorimetry and computational docking simulation. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:2494-2501. [PMID: 31960970 DOI: 10.1002/jsfa.10271] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 11/26/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Many foods contain proteins and polyphenols, but there is a poor understanding of the nature of the inhibitory effect of protein on the biologic activity of polyphenols. The inhibitory mechanism of the food protein lactoferrin on the antibacterial activity of oligomeric ellagitannin oenothein B (OeB) was investigated using fluorescence quenching, isothermal titration calorimetry (ITC), circular dichroism (CD) measurement and molecular docking. RESULTS The antibacterial activity of OeB against Staphylococcus aureus was inhibited by lactoferrin, which was retained at about 60%. An interaction study revealed that an interaction occurred between OeB and lactoferrin. Thermodynamic analyses indicate that the binding process was spontaneous, and the main driving forces were based on electrostatic interactions that contributed to a high interaction affinity between OeB and lactoferrin. Furthermore, CD spectra provided insights into conformational changes of lactoferrin. Finally, molecular docking analysis provided a visual representation of a single binding site where OeB interacted with specific amino acid residues located at the active site of lactoferrin. In particular, due to the unique macrocyclic structure and rigid ring structure of OeB, a small number of hydroxyl groups in the rigid structure of OeB interacted with the amino acid of lactoferrin while most of the phenolic hydroxyl groups were not associated with lactoferrin. CONCLUSION Our study provides a theoretical basis for the use of OeB as an antibacterial substance that can be used in nutraceuticals and pharmaceutical products. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Lichao Zhao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, P. R. China
| | - Aidi Zhou
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, P. R. China
| | - Zitao Liu
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, P. R. China
| | - Jian Xiao
- Department of Microbiology Inspection, Guangzhou Institute for Food Inspection, Guangzhou, P. R. China
| | - Yu Wang
- Department of Microbiology Inspection, Guangzhou Institute for Food Inspection, Guangzhou, P. R. China
| | - Yong Cao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, P. R. China
| | - Li Wang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, P. R. China
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Wang L, Liang H, Liu Z, Zhang J, Wang Y, Xiao J, Zhao L. Investigation on the inactivation of trypsin by oenothein B: isothermal titration calorimetry and docking studies. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.14414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li Wang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food Science South China Agricultural University Guangzhou 510642 China
| | - Huijun Liang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food Science South China Agricultural University Guangzhou 510642 China
| | - Zitao Liu
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food Science South China Agricultural University Guangzhou 510642 China
| | - Jingfeng Zhang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food Science South China Agricultural University Guangzhou 510642 China
| | - Yu Wang
- Guangzhou Institute for Food Inspection Guangzhou 511400 China
| | - Jian Xiao
- Guangzhou Institute for Food Inspection Guangzhou 511400 China
| | - Lichao Zhao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food Science South China Agricultural University Guangzhou 510642 China
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14
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Nsor-Atindana J, Goff HD, Saqib MN, Chen M, Liu W, Ma J, Zhong F. Inhibition of α-amylase and amyloglucosidase by nanocrystalline cellulose and spectroscopic analysis of their binding interaction mechanism. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.12.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Plundrich NJ, Cook BT, Maleki SJ, Fourches D, Lila MA. Binding of peanut allergen Ara h 2 with Vaccinium fruit polyphenols. Food Chem 2019; 284:287-295. [PMID: 30744860 DOI: 10.1016/j.foodchem.2019.01.081] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/08/2019] [Accepted: 01/08/2019] [Indexed: 01/30/2023]
Abstract
The potential for 42 different polyphenols found in Vaccinium fruits to bind to peanut allergen Ara h 2 and inhibit IgE binding epitopes was investigated using cheminformatics techniques. Out of 12 predicted binders, delphinidin-3-glucoside, cyanidin-3-glucoside, procyanidin C1, and chlorogenic acid were further evaluated in vitro. Circular dichroism, UV-Vis spectroscopy, and immunoblotting determined their capacity to (i) bind to Ara h 2, (ii) induce protein secondary structural changes, and (iii) inhibit IgE binding epitopes. UV-Vis spectroscopy clearly indicated that procyanidin C1 and chlorogenic acid interacted with Ara h 2, and circular dichroism results suggested that interactions with these polyphenols resulted in changes to Ara h 2 secondary structures. Immunoblotting showed that procyanidin C1 and chlorogenic acid bound to Ara h 2 significantly decreased the IgE binding capacity by 37% and 50%, respectively. These results suggest that certain polyphenols can inhibit IgE recognition of Ara h 2 by obstructing linear IgE epitopes.
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Affiliation(s)
- Nathalie J Plundrich
- Plants for Human Health Institute, Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, North Carolina Research Campus, Kannapolis, NC 28081, USA
| | - Bethany T Cook
- Department of Chemistry, Bioinformatics Research Center, North Carolina State University, Raleigh, NC 27695, USA
| | - Soheila J Maleki
- United States Department of Agriculture-Agricultural Research Service-Southern Regional Research Center, New Orleans, LA 70124, USA
| | - Denis Fourches
- Department of Chemistry, Bioinformatics Research Center, North Carolina State University, Raleigh, NC 27695, USA
| | - Mary Ann Lila
- Plants for Human Health Institute, Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, North Carolina Research Campus, Kannapolis, NC 28081, USA.
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16
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Lin J, Xu Y, Wang Y, Huang S, Li J, Meti MD, Xu X, Hu Z, Liu J, He Z, Xu H. Dissection of binding of trypsin to its natural inhibitor Gensenoside-Rg1 using spectroscopic methods and molecular modeling. J Biomol Struct Dyn 2018; 37:4070-4079. [DOI: 10.1080/07391102.2018.1539411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Jialiang Lin
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Yang Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
- School of Science and Engineering, Chinese University of Hong Kong, Shenzhen, China
| | - Yuhan Wang
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Songyang Huang
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Junwei Li
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Manjunath D. Meti
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Xu Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Zhangli Hu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Johnson Liu
- School Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Zhendan He
- School of Medicine, Shenzhen University, Shenzhen, China
| | - Hong Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
- Key Laboratory of RF Circuits and Systems of Ministry of Education, Hangzhou Dianzi University, Hangzhou, China
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17
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Luganini A, Terlizzi ME, Catucci G, Gilardi G, Maffei ME, Gribaudo G. The Cranberry Extract Oximacro ® Exerts in vitro Virucidal Activity Against Influenza Virus by Interfering With Hemagglutinin. Front Microbiol 2018; 9:1826. [PMID: 30131793 PMCID: PMC6090095 DOI: 10.3389/fmicb.2018.01826] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/23/2018] [Indexed: 01/13/2023] Open
Abstract
The defense against influenza virus (IV) infections still poses a series of challenges. The current antiviral arsenal against influenza viruses is in fact limited; therefore, the development of new anti-influenza strategies effective against antigenically different viruses is an urgent priority. Bioactive compounds derived from medicinal plants and fruits may provide a natural source of candidates for such broad-spectrum antivirals. In this regard, cranberry (Vaccinium macrocarpon Aiton) extracts on the basis of their recognized anti-adhesive activities against bacteria, may provide potential compounds able to prevent viral attachment to target cells. Nevertheless, only few studies have so far investigated the possible use of cranberry extracts as an antiviral tool. This study focuses on the suitability of a cranberry extract as a direct-acting anti-influenza compound. We show that the novel cranberry extract Oximacro® inhibits influenza A and B viruses (IAV, IBV) replication in vitro because of its high content of A-type proanthocyanidins (PAC-A) dimers and trimers. Mechanistic studies revealed that Oximacro® prevents attachment and entry of IAV and IBV into target cells and exerts a virucidal activity. Oximacro® was observed to interact with the ectodomain of viral hemagglutinin (HA) glycoprotein, thus suggesting the interference with HA functions and a consequent loss of infectivity of IV particles. Fluorescence spectroscopy revealed a reduction in the intrinsic fluorescence of HA protein after incubation with purified dimeric PAC-A (PAC-A2), thus confirming a direct interaction between HA and Oximacro® PAC-A2. In silico docking simulations further supported the in vitro results and indicated that among the different components of the Oximacro® chemical profile, PAC-A2 exhibited the best binding propensity with an affinity below 10 nM. The role of PAC-A2 in the anti-IV activity of Oximacro® was eventually confirmed by the observation that it prevented IAV and IVB replication and caused the loss of infectivity of IV particles, thus indicating PAC-A2 as the major active component of Oximacro®. As a whole, these results suggest Oximacro® as a potential candidate to create novel antiviral agents of natural origin for the prevention of IV infections.
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Affiliation(s)
- Anna Luganini
- Laboratory of Microbiology and Virology, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Maria E. Terlizzi
- Laboratory of Microbiology and Virology, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Gianluca Catucci
- Biochemistry Laboratory, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Gianfranco Gilardi
- Biochemistry Laboratory, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Massimo E. Maffei
- Plant Physiology Laboratory, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Giorgio Gribaudo
- Laboratory of Microbiology and Virology, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
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Wu Z, Huang F, Chen Y, Xu H, Meti MD, Fan Y, Han QG, Tang H, He Z, Hu Z. Conformation change of trypsin induced by acteoside as studied using multiple spectroscopic and molecular docking methods. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2018. [DOI: 10.1080/10942912.2018.1454944] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Zhibing Wu
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Fengwen Huang
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Yutao Chen
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
- School of Science, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland, New Zealand
| | - Hong Xu
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
- Key Laboratory of RF Circuits and Systems of Ministry of Education, Hangzhou Dianzi University, Hangzhou, China
| | - Manjunath D. Meti
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Yu Fan
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Qingguo G. Han
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Haifeng Tang
- Department of Gynecology and Obstetrics, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Zhendan He
- School of Medicine, Shenzhen University, Shenzhen, China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
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Shi W, Wang Y, Zhang H, Liu Z, Fei Z. Probing deep into the binding mechanisms of folic acid with α-amylase, pepsin and trypsin: An experimental and computational study. Food Chem 2017; 226:128-134. [DOI: 10.1016/j.foodchem.2017.01.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 11/16/2016] [Accepted: 01/12/2017] [Indexed: 01/08/2023]
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20
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Wang J, Ma L, Zhang Y, Jiang T. Investigation of the interaction of deltamethrin (DM) with human serum albumin by multi-spectroscopic method. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.09.061] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Fan Y, Zhang Y, Yokoyama W, Yi J. β-Lactoglobulin–chlorogenic acid conjugate-based nanoparticles for delivery of (−)-epigallocatechin-3-gallate. RSC Adv 2017. [DOI: 10.1039/c6ra28462k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The release of EGCG was controlled by BLG–CA conjugate.
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Affiliation(s)
- Yuting Fan
- Department of Food Science and Engineering
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- China
| | - Yuzhu Zhang
- Western Regional Research Center
- ARS
- USDA
- Albany
- USA
| | | | - Jiang Yi
- Department of Food Science and Engineering
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- China
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22
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Wu Z, Shen L, Han Q, Lu J, Tang H, Xu X, Xu H, Huang F, Xie J, He Z, Zeng Z, Hu Z. Mechanism and Nature of Inhibition of Trypsin by Ligupurpuroside A, a Ku-Ding Tea Extract, Studied by Spectroscopic and Docking Methods. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9465-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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A specific dose of grape seed-derived proanthocyanidins to inhibit body weight gain limits food intake and increases energy expenditure in rats. Eur J Nutr 2016; 56:1629-1636. [PMID: 27039093 DOI: 10.1007/s00394-016-1209-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 03/17/2016] [Indexed: 12/22/2022]
Abstract
PURPOSE Several studies have suggested that flavanols may have antiobesity effects; however, those effects clearly depend on the experimental conditions. In a previous study, we found that a single acute dose of grape seed proanthocyanidin extract (GSPE) has satiating effects. We therefore hypothesise that satiating doses of GSPE could be used to reduce body weight gain, and our present objective was to define the most effective dose. METHODS We assayed two GSPE doses in aged male Wistar rats. First we performed a subchronic (8-day) treatment by intragastric administration, which was repeated after a washout period. We measured body weight, energy intake and faeces composition; we performed indirect calorimetry; and we analysed the mRNA expression of genes involved in lipid metabolism to determine the target tissue for the GSPE. RESULTS We observed that 0.5 g GSPE/kg BW significantly reduced food intake and thus the amount of energy absorbed. This dosage also increased lipid oxidation in subcutaneous adipose tissue, thus causing a higher total energy expenditure. These combined effects caused a decrease in body weight. Conversely, 1 g GSPE/kg BW, which also reduced energy absorption after the first treatment, had a rebound effect on body weight gain which resulted in a lower response to the proanthocyanidin extract. That is, after the second treatment, the GSPE did not reduce the energy absorbed or modify energy expenditure and body weight. CONCLUSION GSPE at a dose of 0.5 g/kg can reduce body weight by limiting food intake and activating energy expenditure in subcutaneous adipose tissue.
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Peng X, Wang X, Qi W, Su R, He Z. Affinity of rosmarinic acid to human serum albumin and its effect on protein conformation stability. Food Chem 2016; 192:178-87. [PMID: 26304336 DOI: 10.1016/j.foodchem.2015.06.109] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/07/2015] [Accepted: 06/30/2015] [Indexed: 12/22/2022]
Abstract
Rosmarinic acid (RA) is a natural polyphenol contained in many aromatic plants with promising biological activities. The interaction between RA and human serum albumin (HSA) was investigated by multi-spectroscopic, electrochemistry, molecular docking and molecular dynamics simulation methods. The fluorescence emission of HSA was quenched by RA through a combined static and dynamic quenching mechanism, but the static quenching was the major constituent. Fluorescence experiments suggested that RA was bound to HSA with moderately strong binding affinity through hydrophobic interaction. The probable binding location of RA was located near site I of HSA. Additionally, as shown by the Fourier transform infrared (FT-IR) and circular dichroism (CD) spectra, RA can result in conformational and structural alterations of HSA. Furthermore, the molecular dynamics studies were used to investigate the stability of the HSA and HSA-RA system. Altogether, the results can provide an important insight for the applications of RA in the food industry.
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Affiliation(s)
- Xin Peng
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China; State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Xiangchao Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemistry Science and Engineering (Tianjin), Tianjin 300072, PR China.
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemistry Science and Engineering (Tianjin), Tianjin 300072, PR China
| | - Zhimin He
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemistry Science and Engineering (Tianjin), Tianjin 300072, PR China
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26
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Lin S, Zhang G, Pan J, Gong D. Deciphering the inhibitory mechanism of genistein on xanthine oxidase in vitro. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:463-72. [DOI: 10.1016/j.jphotobiol.2015.10.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/19/2015] [Accepted: 10/27/2015] [Indexed: 10/22/2022]
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27
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Characterization of the binding of flavanone hesperetin with chicken egg lysozyme using spectroscopic techniques: effect of pH on the binding. J INCL PHENOM MACRO 2015. [DOI: 10.1007/s10847-015-0578-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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28
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Peng X, Wang X, Qi W, Huang R, Su R, He Z. Deciphering the binding patterns and conformation changes upon the bovine serum albumin-rosmarinic acid complex. Food Funct 2015; 6:2712-26. [PMID: 26146359 DOI: 10.1039/c5fo00597c] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Rosmarinic acid (RA) is an importantly and naturally occurring polyphenol from plants of the mint family with potent biological activities. Here, the in vitro interaction of RA with bovine serum albumin (BSA) has been investigated using various biophysical approaches as well as molecular modeling methods, to ascertain its binding mechanism and conformational changes. The fluorescence results demonstrated that the fluorescence quenching of BSA by RA was mainly the result of the formation of a ground state BSA-RA complex, and BSA had one high affinity RA binding site with a binding constant of 4.18 × 10(4) mol L(-1) at 298 K. Analysis of thermodynamic parameters revealed that hydrophobic and hydrogen bond interactions were the dominant intermolecular force in the complex formation. The primary binding site of RA in BSA (site I) had been identified by site marker competitive experiments. The distance between RA and the tryptophan residue of BSA was evaluated at 3.12 nm based on Förster's theory of non-radiation energy transfer. The UV-vis absorption, synchronous fluorescence, three-dimensional fluorescence, 8-anilino-1-naphthalenesulfonic acid (ANS) fluorescence, circular dichroism (CD), and Fourier transform infrared (FT-IR) spectra confirmed that the conformation and structure of BSA were altered in the presence of RA. Moreover, the nuclear magnetic spectroscopy showed that the aromatic groups of RA took part in the binding reaction during the BSA-RA complexation. In addition, the molecular picture of the interaction mechanism between BSA and RA at the atomic level was well examined by molecular docking and dynamics studies. In brief, RA can bind to BSA with noncovalent bonds in a relatively stable way, and these findings will be beneficial to the functional food research of RA.
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Affiliation(s)
- Xin Peng
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
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29
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Yao K, Tan P, Luo Y, Feng L, Xu L, Liu Z, Li Y, Peng R. Graphene Oxide Selectively Enhances Thermostability of Trypsin. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12270-12277. [PMID: 25985836 DOI: 10.1021/acsami.5b03118] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the past few years, graphene and its derivative, graphene oxide (GO), have been extensively studied for their applications in biotechnology. In our previous work, we reported certain PEGylated GOs (GO-PEGs) can selectively promote trypsin activity and enhance its thermostability. To further explore this, here we synthesized a series of GO-PEGs with varying PEGylation degrees. Enzymatic activity assay shows that both GO and GO-PEGs can protect trypsin, but not chymotrypsin, from thermal denaturation at high temperature. Surprisingly, the lower the PEGylation degree, the better the protection, and GO as well as the GO-PEG with the lowest PEGylation degree show the highest protection efficiency (∼70% retained activity at 70 °C). Fluorescence spectroscopy analysis shows that GO/GO-PEGs have strong interactions with trypsin. Molecular Dynamics (MD) simulation results reveal that trypsin is adsorbed onto the surface of GO through its cationic residues and hydrophilic residues. Different from chymotrypsin adsorbed on GO, the active site of trypsin is covered by GO. MD simulation at high temperature shows that, through such interaction with GO, trypsin's active site is therefore stabilized and protected by GO. Our work not only illustrates the promising potential of GO/GO-PEGs as efficient, selective modulators for trypsin, but also provides the interaction mechanism of GO with specific proteins at the nano-bio interface.
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30
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Wang Y, Zhang G, Wang L. Potential toxicity of phthalic acid esters plasticizer: interaction of dimethyl phthalate with trypsin in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:75-84. [PMID: 25496445 DOI: 10.1021/jf5046359] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Dimethyl phthalate (DMP) is widely used as a plasticizer in industrial processes and has been reported to possess potential toxicity to the human body. In this study, the interaction between DMP and trypsin in vitro was investigated. The results of fluorescence, UV–vis, circular dichroism, and Fourier transform infrared spectra along with cyclic voltammetric measurements indicated that the remarkable fluorescence quenching and conformational changes of trypsin resulted from the formation of a DMP–trypsin complex, which was driven mainly by hydrophobic interactions. The molecular docking and trypsin activity assay showed that DMP primarily interacted with the catalytic triad of trypsin and led to the inhibition of trypsin activity. The dimensions of the individual trypsin molecules were found to become larger after binding with DMP by atomic force microscopy imaging. This study offers a comprehensive picture of DMP–trypsin interaction, which is expected to provide insights into the toxicological effect of DMP.
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31
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Dias R, Perez-Gregorio R, Mateus N, De Freitas V. The interaction between tannins and gliadin derived peptides in a celiac disease perspective. RSC Adv 2015. [DOI: 10.1039/c5ra02968f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The demonstration that food tannins are able to complex with gliadin-derived peptides, in a way that is dependent on both structural features, highlights their potential as modulators of celiac disease.
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Affiliation(s)
- Ricardo Dias
- LAQV-REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Rosa Perez-Gregorio
- LAQV-REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Nuno Mateus
- LAQV-REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Victor De Freitas
- LAQV-REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- 4169-007 Porto
- Portugal
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Salvadó MJ, Casanova E, Fernández-Iglesias A, Arola L, Bladé C. Roles of proanthocyanidin rich extracts in obesity. Food Funct 2015; 6:1053-71. [DOI: 10.1039/c4fo01035c] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Obesity is a multifactorial disorder involving an abnormal or excessive amount of body fat.
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Affiliation(s)
- M. Josepa Salvadó
- Departament de Bioquímica i Biotecnologia
- Universitat Rovira i Virgili
- Tarragona
- Spain
| | - Ester Casanova
- Departament de Bioquímica i Biotecnologia
- Universitat Rovira i Virgili
- Tarragona
- Spain
| | | | - Lluis Arola
- Departament de Bioquímica i Biotecnologia
- Universitat Rovira i Virgili
- Tarragona
- Spain
| | - Cinta Bladé
- Departament de Bioquímica i Biotecnologia
- Universitat Rovira i Virgili
- Tarragona
- Spain
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Wang YQ, Zhang HM. Effects of bisphenol S on the structures and activities of trypsin and pepsin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:11303-11311. [PMID: 25369235 DOI: 10.1021/jf504347w] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effects of bisphenol S on the structures and activities of trypsin and pepsin were investigated by various methods like UV-visible absorbance, fluorescence, circular dichroism, and molecular docking. The secondary and tertiary structures of trypsin and pepsin were altered by bisphenol S binding, which resulted in the loosening of the skeletons of trypsin and pepsin. In addition, bisphenol S induced microenvironmental changes around tyrosine and tryptophan residues of trypsin and pepsin. The activity experimental results showed that the activity of pepsin decreases obviously with the increasing concentration of BPS, while the activity of trypsin does not change remarkably. The binding and thermodynamic parameters obtained by molecular docking and fluorescence spectroscopy showed that the bindings of bisphenol S to trypsin and pepsin were spontaneous processes and hydrogen bonding and hydrophobic interactions played a vital role in stabilizing the bisphenol S-trypsin and bisphenol S-pepsin complexes. The binding constants (K(A)) of bisphenol S with trypsin were 7.42 × 10(4) (298 K) and 5.91 × 10(4) L/mol (310 K), and those of pepsin were 5.78 × 10(4) (298 K) and 4.44 × 10(4) L/mol (310 K). Moreover, there was one main kind of binding site for bisphenol S on trypsin or pepsin.
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Affiliation(s)
- Yan-Qing Wang
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University , Yancheng City, Jiangsu Province 224002, People's Republic of China
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Li Y, An L, Huang Q. Replica exchange Monte Carlo simulation of human serum albumin-catechin complexes. J Phys Chem B 2014; 118:10362-72. [PMID: 25111890 DOI: 10.1021/jp5048503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Replica exchange Monte Carlo simulation equipped with an orientation-enhanced hydrophobic interaction was utilized to study the impacts of molar ratio and ionic strength on the complex formation of human serum albumin (HSA) and catechin. Only a small amount of catechins was found to act as bridges in the formation of HSA-catechin complexes. Selective binding behavior was observed at low catechin to HSA molar ratio (R). Increase of catechin amount can suppress HSA self-aggregation and diminish the selectivity of protein binding sites. Strong saturation binding with short-range interactions was found to level off at around 4.6 catechins per HSA on average, while this number slowly increased with R when long-range interactions were taken into account. Meanwhile, among the three rings of catechin, the 3,4-dihydroxyphenyl (B-ring) shows the strongest preference to bind HSA. Neither the aggregation nor the binding sites of the HSA-catechin complex was sensitive to ionic strength, suggesting that the electrostatic interaction is not a dominant force in such complexes. These results provide a further molecular level understanding of protein-polyphenol binding, and the strategy employed in this work shows a way to bridge phase behaviors at macroscale and the distribution of binding sites at residue level.
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Affiliation(s)
- Yunqi Li
- Laboratory of Advanced Power Sources and ‡State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry (CIAC) , Changchun 130022, P. R. China
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Wang YQ, Tan CY, Zhuang SL, Zhai PZ, Cui Y, Zhou QH, Zhang HM, Fei Z. In vitro and in silico investigations of the binding interactions between chlorophenols and trypsin. JOURNAL OF HAZARDOUS MATERIALS 2014; 278:55-65. [PMID: 24953936 DOI: 10.1016/j.jhazmat.2014.05.092] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 05/29/2014] [Accepted: 05/30/2014] [Indexed: 06/03/2023]
Abstract
Being the first-degree toxic pollutants, chlorophenols (CP) have potential carcinogenic and mutagenic activity and toxicity. Since there still lacks studies on molecular interactions of chlorophenols with trypsin, one major binding target of many exogenous environmental pollutants, the binding interactions between five chlorophenols, 2-CP, 2,6-DCP, 2,4,6-TCP, 2,4,6-TCP, 2,3,4,6-TCP and PCP and trypsin were characterized by the combination of multispectroscopic techniques and molecular modeling. The chlorophenols bind at the one main site of trypsin and the binding induces the changes of microenvironment and global conformations of trypsin. Different number of chloride atoms significantly affects the binding and the binding constants KA ranks as KA (2-CP) < KA (2,6-DCP) ≈ KA (2,4,6-TCP) < KA (2,3,4,6-TCP) < KA (PCP). These chlorophenols interacts with trypsin mainly through hydrophobic interactions and via hydrogen bonding interactions and aromatic-aromatic π-π stacking interaction. Our results offer insights into the binding mechanism of chlorophenols with trypsin and provide important information for possible toxicity risk of chlorophenols to human health.
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Affiliation(s)
- Yan-Qing Wang
- Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng City 224002, Jiangsu Province, People's Republic of China; Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China.
| | - Chun-Yun Tan
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
| | - Shu-Lin Zhuang
- Institute of Environmental Science, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Peng-Zhan Zhai
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
| | - Yun Cui
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
| | - Qiu-Hua Zhou
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
| | - Hong-Mei Zhang
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
| | - Zhenghao Fei
- Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng City 224002, Jiangsu Province, People's Republic of China; Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224002, Jiangsu Province, People's Republic of China
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36
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Mechanism of gold nanoparticles-induced trypsin inhibition: a multi-technique approach. Mol Biol Rep 2014; 41:4911-8. [DOI: 10.1007/s11033-014-3357-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 03/31/2014] [Indexed: 12/20/2022]
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Interaction of methotrexate with trypsin analyzed by spectroscopic and molecular modeling methods. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.07.048] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Zhou A, Yin F, Zhao L, Gong C, Benjakul S, Liu X, Cao Y. Purification and Characterization of Trypsin From the Intestine of Genetically Improved Nile Tilapia (Oreochromis niloticus). JOURNAL OF AQUATIC FOOD PRODUCT TECHNOLOGY 2013. [DOI: 10.1080/10498850.2012.658528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liang M, Liu R, Qi W, Su R, Yu Y, Wang L, He Z. Interaction between lysozyme and procyanidin: Multilevel structural nature and effect of carbohydrates. Food Chem 2013; 138:1596-603. [DOI: 10.1016/j.foodchem.2012.11.027] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/07/2012] [Accepted: 11/07/2012] [Indexed: 12/26/2022]
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Chamni S, De-Eknamkul W. Recent progress and challenges in the discovery of new neuraminidase inhibitors. Expert Opin Ther Pat 2013; 23:409-23. [DOI: 10.1517/13543776.2013.765861] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Liu R, Wang LB, Huang RL, Su RX, Qi W, Yu YJ, He ZM. Self-assembled oligomeric procyanidin–insulin hybrid nanoparticles: a novel strategy for controllable insulin delivery. Biomater Sci 2013; 1:834-841. [DOI: 10.1039/c3bm60066a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gonçalves R, Mateus N, De Freitas V. Influence of carbohydrates on the interaction of procyanidin B3 with trypsin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:11794-11802. [PMID: 21950419 DOI: 10.1021/jf203060s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The biological properties of procyanidins, in particular their inhibition of digestive enzymes, have received much attention in the past few years. Dietary carbohydrates are an environmental factor that is known to affect the interaction of procyanidins with proteins. This work aimed at understanding the effect of ionic food carbohydrates (polygalacturonic acid, arabic gum, pectin, and xanthan gum) on the interaction between procyanidins and trypsin. Physical-chemical techniques such as saturation transfer difference-NMR (STD-NMR) spectroscopy, fluorescence quenching, and nephelometry were used to evaluate the interaction process. Using STD-NMR, it was possible to identify the binding of procyanidin B3 to trypsin. The tested carbohydrates prevented the association of procyanidin B3 and trypsin by a competition mechanism in which the ionic character of carbohydrates and their ability to encapsulate procyanidins seem crucial leading to a reduction in STD signal and light scattering and to a recovery of the proteins intrinsic fluorescence. On the basis of these results, it was possible to grade the carbohydrates in their aggregation inhibition ability: XG > PA > AG ≫ PC. These effects may be relevant since the coingestion of procyanidins and ionic carbohydrates are frequent and furthermore since these might negatively affect the antinutritional properties ascribed to procyanidins in the past.
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Affiliation(s)
- Rui Gonçalves
- Centro de Investigação em Química, Departamento de Química, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
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Kongkamnerd J, Milani A, Cattoli G, Terregino C, Capua I, Beneduce L, Gallotta A, Pengo P, Fassina G, Monthakantirat O, Umehara K, De-Eknamkul W, Miertus S. The Quenching Effect of Flavonoids on 4-Methylumbelliferone, a Potential Pitfall in Fluorimetric Neuraminidase Inhibition Assays. ACTA ACUST UNITED AC 2011; 16:755-64. [DOI: 10.1177/1087057111409221] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Many assays aimed to test the inhibitory effects of synthetic molecules, and naturally occurring products on the neuraminidase activity exploit the hydrolysis of 2′-O-(4-methylumbelliferyl)-N-acetylneuraminic acid (4-MUNANA). The amount of the released product, 4-methylumbelliferone (4-MU), is then measured fluorimetrically. The authors attempted an analysis of the inhibitory properties of 35 naturally occurring flavonoids on neuraminidase N3, where only 29 of them were sufficiently soluble in the assay medium. During the analysis, the authors noticed a strong quenching effect due to the test compounds on the fluorescence of 4-MU. The quenching constants for the flavonoids were determined according to the Stern-Volmer approach. The extent of fluorescence reduction due to quenching and the magnitude of the fluorescence reduction measured in the inhibition assays were comparable: for 11 of 29 compounds, the two values were found to be coincident within the experimental uncertainty. These data were statistically analyzed for correlation by calculating the pertinent Pearson correlation coefficient. Inhibition and quenching were found to be positively correlated (r = 0.71, p(uncorr) = 1.5 × 10−5), and the correlation was maintained for the whole set of tested compounds. Altogether, the collected data imply that all of the tested flavonoids could produce false-positive results in the neuraminidase inhibition assay using 4-MUNANA as a substrate.
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Affiliation(s)
- Jarinrat Kongkamnerd
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Adelaide Milani
- OIE, FAO, and National Reference Laboratory for Avian Influenza and Newcastle Disease, Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Giovanni Cattoli
- OIE, FAO, and National Reference Laboratory for Avian Influenza and Newcastle Disease, Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Calogero Terregino
- OIE, FAO, and National Reference Laboratory for Avian Influenza and Newcastle Disease, Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Ilaria Capua
- OIE, FAO, and National Reference Laboratory for Avian Influenza and Newcastle Disease, Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Luca Beneduce
- Xeptagen SpA, VEGA Science Park Building Auriga, Marghera-Venezia, Italy
| | - Andrea Gallotta
- Xeptagen SpA, VEGA Science Park Building Auriga, Marghera-Venezia, Italy
| | - Paolo Pengo
- Xeptagen SpA, VEGA Science Park Building Auriga, Marghera-Venezia, Italy
| | - Giorgio Fassina
- Xeptagen SpA, VEGA Science Park Building Auriga, Marghera-Venezia, Italy
| | | | - Kaoru Umehara
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Wanchai De-Eknamkul
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Stanislav Miertus
- ICS-UNIDO, International Centre for Science and High Technology of the United Nations Industrial Development Organization, Trieste, Italy
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