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Dahiya V, Anand BG, Kar K, Pal S. In vitro interaction of organophosphate metabolites with bovine serum albumin: A comparative 1H NMR, fluorescence and molecular docking analysis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 163:39-50. [PMID: 31973869 DOI: 10.1016/j.pestbp.2019.10.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 10/15/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
Since the exposure of organophosphate pesticides are known to cause severe health consequences, it is important to understand the molecular interaction of these pesticides metabolites with vital biomolecules, especially with the proteins. Here, considering bovine serum albumin (BSA) as a model protein, we have examined its interaction with two selected organophosphate metabolites, 3,5,6-trichloro-2-pyridinol (TCPy) and paraoxon methyl (PM). TCPy and PM are resultant metabolites of two most widely used organophosphate pesticides chlorpyrifos and parathion respectively. 1H NMR line broadening, selective spin-lattice relaxation rate measurements, saturation transfer difference (STD) NMR of both TCPy and PM were carried out in the presence and absence of BSA. The obtained values of the affinity index (A), binding constants (Ka) and thermodynamic parameters indicated strong organophosphates-BSA interaction. Further, fluorescence quenching data on TCPy-BSA and PM-BSA interactions strongly supported the NMR results, besides providing the stoichiometry of these complexes. Molecular docking analysis unraveled viable, strong hydrogen bonds and electrostatic interactions in TCPy-BSA and PM-BSA complexes. This study also revealed substantial time-dependent changes in the 1H NMR intensity of PM in the presence of BSA, which suggests faster degradation of PM with increasing protein concentration during protein-metabolite interactions. The hydrolysis is attributed to the esterase-like action of BSA. The result provides key insights into the direct interaction of the organophosphate metabolites with a biologically important carrier protein, serum albumin.
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Affiliation(s)
- Vandana Dahiya
- Department of Chemistry, Indian Institute of Technology Jodhpur, 342011, India
| | - Bibin G Anand
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, 342011, India
| | - Karunakar Kar
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Samanwita Pal
- Department of Chemistry, Indian Institute of Technology Jodhpur, 342011, India.
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Zhai Y, Deng P, Wang X, Zhang C, Gan R, Gan N, Sun Q, Li H. Interaction mechanism of olaparib binding to human serum albumin investigated with NMR relaxation data and computational methods. RSC Adv 2018; 8:31555-31563. [PMID: 35548207 PMCID: PMC9085917 DOI: 10.1039/c8ra05330h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/02/2018] [Indexed: 11/21/2022] Open
Abstract
The interaction mechanism between olaparib (OLA) and human serum albumin (HSA) has been investigated using experimental and computational techniques. An NMR relaxation approach based on the analysis of proton selective and non-selective spin-lattice relaxation rates at different temperatures can provide quantitative information about the affinity index and the thermodynamic equilibrium constant of the OLA-HSA system. The affinity index and the thermodynamic equilibrium constant decreased as temperature increased, indicating that the interactions between OLA and HSA could be weakened as temperature increased. Molecular docking and dynamics simulations revealed that OLA stably bound to subdomain II (site 1), and OLA could induce the conformational and micro-environmental changes in HSA. CD results suggested that α-helix content decreased after OLA was added, demonstrating that OLA affected the secondary structure of HSA.
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Affiliation(s)
- Yuanming Zhai
- Analytical & Testing Center, Sichuan University Chengdu 610064 China
| | - Pengchi Deng
- Analytical & Testing Center, Sichuan University Chengdu 610064 China
| | - Xiaoyan Wang
- Analytical & Testing Center, Sichuan University Chengdu 610064 China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University Chengdu 610064 China
| | - Ruixue Gan
- School of Chemical Engineering, Sichuan University Chengdu 610065 China
| | - Na Gan
- School of Chemical Engineering, Sichuan University Chengdu 610065 China
| | - Qiaomei Sun
- School of Chemical Engineering, Sichuan University Chengdu 610065 China
| | - Hui Li
- School of Chemical Engineering, Sichuan University Chengdu 610065 China
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He Y, Cheng P, Wang W, Yan S, Tang Q, Liu D, Xie H. Rapid Investigation and Screening of Bioactive Components in Simo Decoction via LC-Q-TOF-MS and UF-HPLC-MD Methods. Molecules 2018; 23:molecules23071792. [PMID: 30036998 PMCID: PMC6100586 DOI: 10.3390/molecules23071792] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/06/2018] [Accepted: 07/13/2018] [Indexed: 01/19/2023] Open
Abstract
Simo decoction (SMD), as a traditional medicine, is widely used in the treatment of gastrointestinal dysmotility in China. In this study, a combined method of liquid chromatography quadrupole time-of-flight mass spectrometry (LC-Q-TOF-MS) and ultrafiltration high-performance liquid chromatography molecular docking (UF-HPLC-MD) was efficiently employed to identify and screen bioactive ingredients in SMD. Ninety-four major constituents were identified or tentatively characterized by comparing their retention times and mass spectra with standards or literature data by using LC-Q-TOF-MS, and the ascription of those compounds were classified for the first time. Among them, 13 bioactive ingredients, including norisoboldine, eriocitrin, neoeriocitrin, narirutin, hesperidin, naringin, neohesperidin, hesperitin-7-O-glucoside, linderane, poncirin, costunolide, nobiletin, and tangeretin, were primarily identified as the human serum albumin (HSA) ligands at a range of docking scores from −29.7 to −40.6 kJ/mol by UF-HPLC-MD. The results indicate the systematic identification and screening of HSA ligands from Simo decoction guided by LC-Q-TOF-MS and UF-HPLC-MD represents a feasible and efficient method that could be extended for the identification and screening of other bioactive ingredients from natural medicines.
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Affiliation(s)
- Yingjie He
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
- State Key Laboratory of Subhealth Intervention Technology, Changsha 410128, China.
| | - Pi Cheng
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
- Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients, Changsha 410128, China.
| | - Wei Wang
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
| | - Sien Yan
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
| | - Qi Tang
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
- Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients, Changsha 410128, China.
| | - Dongbo Liu
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
- State Key Laboratory of Subhealth Intervention Technology, Changsha 410128, China.
- Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients, Changsha 410128, China.
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, China.
| | - Hongqi Xie
- Horticulture and Landscape College, Hunan Agricultural University, Changsha 410128, China.
- State Key Laboratory of Subhealth Intervention Technology, Changsha 410128, China.
- Hunan Co-Innovation Center for Utilization of Botanical Functional Ingredients, Changsha 410128, China.
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, China.
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Raghav A, Ahmad J, Alam K. Preferential recognition of advanced glycation end products by serum antibodies and low-grade systemic inflammation in diabetes mellitus and its complications. Int J Biol Macromol 2018; 118:1884-1891. [PMID: 30009900 DOI: 10.1016/j.ijbiomac.2018.07.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Advanced glycation end products (AGEs) have shown to possess antigenicity. This study analyzes the detrimental effect of non-enzymatic glycation on human serum albumin (HSA) leading to the production of antibodies. METHODS HSA (20 μM) incubated with d-glucose formed AGEs confirmed by scanning electron microscopy (SEM). DNA-damage was assessed with comet assay. Antibodies against in-vitro formed AGEs was evaluated in the sera of diabetic patients by enzyme-linked immunosorbent assay. Molecular docking was performed to demonstrate affinity of native and glycated-HSA with IgG. Low-grade systemic inflammation was quantified with IL-4, IL-6, TNF-α and NF-кβ in serum and mRNA expression. RESULTS Scanning Electron Microscopy showed the formation of aggregates in glycated-HSA. Comet assay showed DNA damage T2DM with CKD. Serum auto-antibodies in diabetes patients with chronic kidney disease (CKD) showed appreciably high recognition with glycated-HSA compared to native HSA. Molecular docking showed less affinity of glycated-HSA with IgG. Serum IL-4, IL-6, and TNF-α were found significantly higher in T2DM with CKD compared to T2DM and healthy ones. mRNA expression of IL-4, IL-6 and NF-кβ are also found significantly higher in T2DM with CKD. CONCLUSION The non-enzymatic glycation-induced damage to the HSA generate neo-epitopes that possess immunogenic response and low-grade systemic inflammation.
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Affiliation(s)
- Alok Raghav
- Rajiv Gandhi Centre for Diabetes and Endocrinology, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Jamal Ahmad
- Rajiv Gandhi Centre for Diabetes and Endocrinology, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India.
| | - Khursheed Alam
- Department of Biochemistry, Aligarh Muslim University, Aligarh 202002, India
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Unsaturated aldehyde, 4-hydroxynonenal (HNE) alters the structural integrity of HSA with consequences in the immuno-pathology of rheumatoid arthritis. Int J Biol Macromol 2018; 112:306-314. [DOI: 10.1016/j.ijbiomac.2018.01.188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/27/2018] [Accepted: 01/29/2018] [Indexed: 12/18/2022]
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Zhang S, Yang H, Zhao L, Gan R, Tang P, Sun Q, Xiong X, Li H. Capecitabine as a minor groove binder of DNA: molecular docking, molecular dynamics, and multi-spectroscopic studies. J Biomol Struct Dyn 2018; 37:1451-1463. [PMID: 29620482 DOI: 10.1080/07391102.2018.1461137] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The interaction mechanism and binding mode of capecitabine with ctDNA was extensively investigated using docking and molecular dynamics simulations, fluorescence and circular dichroism (CD) spectroscopy, DNA thermal denaturation studies, and viscosity measurements. The possible binding mode and acting forces on the combination between capecitabine and DNA had been predicted through molecular simulation. Results indicated that capecitabine could relatively locate stably in the G-C base-pairs-rich DNA minor groove by hydrogen bond and several weaker nonbonding forces. Fluorescence spectroscopy and fluorescence lifetime measurements confirmed that the quenching was static caused by ground state complex formation. This phenomenon indicated the formation of a complex between capecitabine and ctDNA. Fluorescence data showed that the binding constants of the complex were approximately 2 × 104 M-1. Calculated thermodynamic parameters suggested that hydrogen bond was the main force during binding, which were consistent with theoretical results. Moreover, CD spectroscopy, DNA melting studies, and viscosity measurements corroborated a groove binding mode of capecitabine with ctDNA. This binding had no effect on B-DNA conformation.
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Affiliation(s)
- Shuangshuang Zhang
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Hongqin Yang
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Ludan Zhao
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Ruixue Gan
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Peixiao Tang
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Qiaomei Sun
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Xinnuo Xiong
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Hui Li
- a College of Chemical Engineering , Sichuan University , Chengdu 610065 , Sichuan , China
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Drug-protein binding of Danhong injection and the potential influence of drug combination with aspirin: Insight by ultrafiltration LC–MS and molecular modeling. J Pharm Biomed Anal 2017; 134:100-107. [DOI: 10.1016/j.jpba.2016.11.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/03/2016] [Accepted: 11/05/2016] [Indexed: 01/24/2023]
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Yang Z, Zhou T, Cheng Y, Li M, Tan X, Xu F. Weakening Impact of Excessive Human Serum Albumin (eHSA) on Cisplatin and Etoposide Anticancer Effect in C57BL/6 Mice with Tumor and in Human NSCLC A549 Cells. Front Pharmacol 2016; 7:434. [PMID: 27895586 PMCID: PMC5108922 DOI: 10.3389/fphar.2016.00434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 10/31/2016] [Indexed: 11/16/2022] Open
Abstract
Excessive human serum albumin (eHSA) impact on anticancer effects is inconsistent. We explored the outcome of cisplatin (DDP)/etoposide (VP-16) plus eHSA in vivo and in vitro. C57BL/6 mice with tumor were used to compare the efficacy of DDP/VP-16 alone and DDP/VP-16+eHSA. Blood albumin was measured to confirm whether eHSA elevate its level. Western blotting assay were used to measure the expression of ERCC1/TOP2A in tumor tissues. Cell proliferation, mRNA, and protein expression of ERCC1/TOP2A were also assayed to compare two groups in A549 cells. Furthermore we evaluated eHSA impact on cell proliferation in RNAi targeting ERCC1/TOP2A in A549 cells, respectively. eHSA reduced the anticancer effect of DDP/VP-16 without altering albumin level, increased protein expression of ERCC1/TOP2A, respectively in mice. Similarly, eHSA increased mRNA and proteins expression of ERCC1/TOP2A in A549 cells. In RNAi A549 cells, however, eHSA no longer weakened but enhanced the anticancer effect of DDP, while no longer altered the effect of VP-16. Our findings suggested that eHSA weaken the anticancer effect of DDP/VP-16 via up-regulating ERCC1/TOP2A expression, respectively. Further molecular mechanism studies are warranted to investigate whether eHSA is not conducive to lung cancer chemotherapy.
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Affiliation(s)
- Zhen Yang
- Fengxian Hospital Graduate Training Base, Jinzhou Medical UniversityShanghai, China; Graduate School, Jinzhou Medical UniversityLiaoning, China
| | - Ting Zhou
- Department of Pharmacy, Fengxian Hospital, Southern Medical University Shanghai, China
| | - Yuanchi Cheng
- Graduate School, Jinzhou Medical University Liaoning, China
| | - Mingming Li
- Department of Pharmacy, Fengxian Hospital, Southern Medical University Shanghai, China
| | - Xianglin Tan
- Rutgers Cancer Institute of New Jersey, The State University of New Jersey New Brunswick, NJ, USA
| | - Feng Xu
- Fengxian Hospital Graduate Training Base, Jinzhou Medical UniversityShanghai, China; Department of Pharmacy, Fengxian Hospital, Southern Medical UniversityShanghai, China; Department of Pharmacy, 6th People's Hospital South Campus, Shanghai Jiaotong UniversityShanghai, China
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