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Huang Z, Wang J, Chen H, Feng R, Tan C. The interaction on HSA and the antibacterial activity from four polyoxometalate hybrids based on berberine. Nucleosides Nucleotides Nucleic Acids 2023; 43:156-172. [PMID: 37574837 DOI: 10.1080/15257770.2023.2243292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/15/2023]
Abstract
Four organic-polyoxometalate hybrids BR4[SiW12O40] (BR-SiW), BR3[PMo12O40] (BR-PMo), BR4K[EuSiW11O40]·2H2O (BR-EuSiW) and BR6Na3[EuW10O36] (BR-EuW) were fabricated by the polyoxometalates (POMs) anions and berberine cations (BR) noted for the alkaloids in traditional Chinese herbal medicine. These hybrids have been characterized and confirmed. The interaction between hybrids and human serum albumin (HSA) was investigated in a buffer solution (pH 7.4) using ultraviolet-visible light absorption and fluorescence techniques. The classical Stern-Volmer equation was used to analyze the fluorescence quenching at three temperatures (296, 303 and 310 K), and the static quenching mechanism for interaction was proposed. The Thermodynamic parameters, enthalpy, entropy change, and Gibbs free energy of hybrids interacting on HSA were calculated by Scatchard equation. The results indicated that therewas one binding site on the protein and BR-POMs all showed stronger binding force than that of raw materials. Synchronous fluorescence results showed that the binding sites of BR-POMs and HSA were not effectively affected the surrounding microenvironment. The following antibacterial experiments implied that inhibitory effect of hybrids were synergistic effect from organic active ingredient and POMs but the simple combination. All these data were prepared for further research on biology.
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Affiliation(s)
- Zizhen Huang
- Gansu University of Traditional Chinese Medicine, Lanzhou, PR China
| | - Jie Wang
- Gansu University of Traditional Chinese Medicine, Lanzhou, PR China
| | - Hui Chen
- Gansu University of Traditional Chinese Medicine, Lanzhou, PR China
| | - Ruofei Feng
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou, PR China
| | - Chunxia Tan
- Gansu University of Traditional Chinese Medicine, Lanzhou, PR China
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Kheirdoosh F, Kashanian S, Khodaei MM, Sariaslani M, Falsafi M, Moghadam NH, Salehzadeh S, Pazhavand M, Kashanian M. Spectroscopic studies on the interaction of aspartame with human serum albumin. Nucleosides Nucleotides Nucleic Acids 2021; 40:300-316. [PMID: 33455539 DOI: 10.1080/15257770.2021.1872792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
In this work the binding of artificial sweetener aspartame with human serum albumin (HSA) was studied at physiological pH. Binding studies of aspartame (APM) with HSA are useful to understand APM -HSA interaction, mechanism and providing guidance for the application and design of new and more efficient artificial sweeteners. The interaction was investigated by spectrophotometric, spectrofluorometric competition experiment and circular dichroism (CD) techniques. The results indicated that the binding of APM to HSA caused fluorescence quenching of HSA through static quenching mechanism with binding constant 1.42 × 10+4 M-1 at 298 K and the number of binding sites is approximately one. Thermodynamic parameters, enthalpy changes (ΔH) and entropy changes (ΔS) were calculated to be -41.20 kJ mol-1 and -58.19 J mol-1 K-1, respectively, according to van't Hoff equation, which indicated that reaction is enthalpically driven. Quenching of the fluorescence of HSA was found to be a static quenching process. The binding constants and number of binding sites were obtained at three different temperatures (298, 308 and 318 K). Combining above results and those of spectrofluorometric competition experiment and circular dichroism (CD), indicated that APM binds to HSA via Sudlow's site I. Furthermore, the study of molecular docking on HSA binding also indicated that APM can strongly bind to the site I (subdomain IIA) of HSA mainly by hydrophobic interaction and hydrogen bond interactions exist between APM and HSA.
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Affiliation(s)
- Fahimeh Kheirdoosh
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Soheila Kashanian
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran.,Nano drug delivery research center, Kermanshah University of medical sciences, Kermanshah, Iran
| | - Mohammad Mehdi Khodaei
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Mahya Sariaslani
- School of Paramedical, Kermanshah University of Medical Science, Kermanshah, Iran
| | - Monireh Falsafi
- Department of Inorganic Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | | | | | - Mahsa Pazhavand
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Mahdi Kashanian
- School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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