1
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Synthesis, molecular docking and anticancer potential of azolium based salts and their silver complexes: DNA/BSA interaction studies and cell cycle analysis. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Noureen S, Ali S, Iqbal J, Zia MA, Hussain T. Synthesis, Comparative Theoretical and Experimental Characterization of Some New 1,3,5 triazine Based Heterocyclic Compounds and in vitro Evaluation as Promising Biologically Active Agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Noureen S, Ali S, Zia MA, Afzal M, Ayub AR, El-Naggar M. Synthesis, combined theoretical and spectral characterization of some new 1,3,5 triazine compounds, and their in vitro biological analysis. REACT CHEM ENG 2022. [DOI: 10.1039/d2re00389a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
New N-heterocyclic compounds with a 1,3,5 triazine core were synthesized by a nucleophilic substitution reaction.
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Affiliation(s)
- Sadia Noureen
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Shaukat Ali
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Anjum Zia
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Afzal
- Soil and Environmental Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Ali Raza Ayub
- Department of Chemistry, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Mohamed El-Naggar
- Department of Chemistry, Pure and Applied Chemistry Research Group, Faculty of Sciences University of Sharjah, Sharjah, 27272, United Arab Emirates
- National Institute of Oceanography and Fisheries, Kayet Bay, Alexandria, Egypt
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de Almeida ERM, Martinelli ECL, Pereira EC, Raspantini LER, Hueza IM. Alternative method for oral administration of insoluble toxins to rats. A prenatal study of L-mimosine. Toxicon 2021; 202:82-89. [PMID: 34582830 DOI: 10.1016/j.toxicon.2021.09.013] [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: 08/10/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
L-mimosine is a compound found in Leucaena leucocephala, that is used as animal feed due to its high protein content, but it can also cause intoxication. Due to its low solubility in organic and aqueous solvents, its administration in laboratory animals is difficult, especially in delicate periods such as pregnancy. Thus, to circumvent such problems, this study proposes a stress-free form of oral administration with gelatin tablets with flavoring (meat broth) for 14 consecutive days of the gestational period (GD06 to GD20). For that, 17 pregnant Wistar rats divided into 3 groups were used: control (CO; n = 5) not treated; gelatin (GEL; n = 6), which received a gelatin tablet with flavoring; and gelatin with flavoring added 140 mg/kg of L-mimosine (GM; n = 6). All animals received feed and water ad libitum. The parameters analyzed were body weight gain, water and feed consumption, serum biochemistry, blood count and reproductive indices. Among these, only the real and total weight gains of dams showed statistically significant differences, with a decrease in the group GM. Thus, we could observe that flavored gelatin was an efficient and effective administration method to insoluble compounds and long-term administration to pregnant rats, with quick adaptation and without refusal by the animals. In addition, we could observe a direct effect of L-mimosine on the animals' weight gain; however, the dose administered was not sufficient to confer maternal and fetal toxicity.
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Affiliation(s)
- Elaine R M de Almeida
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, S.P., Brazil
| | - Elaine C L Martinelli
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, S.P., Brazil
| | - Edimar C Pereira
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo (ICAQF-UNIFESP), Diadema, S.P., Brazil
| | - Leonila E R Raspantini
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, S.P., Brazil
| | - Isis M Hueza
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, S.P., Brazil; Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo (ICAQF-UNIFESP), Diadema, S.P., Brazil.
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5
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Design, DFT studies, antimicrobial and antioxidant potential of Binuclear N-heterocyclic Carbene (NHCs) complexes, Probing the aspect of DNA interaction through In-vitro and In-silico approach. Comput Biol Chem 2021; 95:107591. [PMID: 34702631 DOI: 10.1016/j.compbiolchem.2021.107591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 10/02/2021] [Accepted: 10/11/2021] [Indexed: 11/24/2022]
Abstract
N-heterocyclic carbene (NHC) adducts have shown remarkable biological potential for numerous medical applications. With an aim to improve biological potential of benzimidazolium salts, newer analogues of benzimidazole and their silver complexes were synthesized and characterized. Synthesized salts (L1-L2) and silver complexes (C1-C2) were confirmed through elemental analysis, UV-visible spectroscopy, FTIR, 1H NMR & 13C NMR spectroscopy. The compounds C1 & C2 were found stable in solution form for studied time period when examined spectroscopically and showed optimum lipophilicity when measured for their partition coefficient through flask shake method. Synthesized compounds showed good antimicrobial potential against gram positive bacterial strain S. Aureus with IC50 2.02±0.12 and 2.11±0.13 µM respectively while 2.11±0.1 and 2.28±0.17 µM against gram negative bacterial strain E. Coli for C1 and C2 respectively. The interaction study of the related compounds with DNA was predicted by molecular docking study, which confirmed that the studied compound C1 (-8.04 kcal/mol) has a higher binding energy than compound C2 (-4.23 kcal/mol); Also, the compound C1 exhibits a better affinity against to DNA than Ethidium bromide (-7.68 kcal/mol) and cisplatin (-6.21 kcal/mol).The claim was practically assured through spectroscopic and viscometeric method which confirmed that compounds have good affinity for DNA with binding constant kb, 5.78×104 M-1 and 6.84×104 M-1 for C1 and C2 respectively.
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Azolium mediated N Heterocyclic carbene selenium adducts: Synthesis, cytotoxicity and molecular docking studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130701] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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7
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Ribeiro AG, Alves JEF, Soares JCS, dos Santos KL, Jacob ÍTT, da Silva Ferreira CJ, dos Santos JC, de Azevedo RDS, de Almeida SMV, de Lima MDCA. Albumin roles in developing anticancer compounds. Med Chem Res 2021. [DOI: 10.1007/s00044-021-02748-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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8
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Anand BG, Wu Q, Karthivashan G, Shejale KP, Amidian S, Wille H, Kar S. Mimosine functionalized gold nanoparticles (Mimo-AuNPs) suppress β-amyloid aggregation and neuronal toxicity. Bioact Mater 2021; 6:4491-4505. [PMID: 34027236 PMCID: PMC8131740 DOI: 10.1016/j.bioactmat.2021.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/18/2021] [Accepted: 04/19/2021] [Indexed: 12/27/2022] Open
Abstract
Evidence suggests that increased level/aggregation of beta-amyloid (Aβ) peptides initiate neurodegeneration and subsequent development of Alzheimer's disease (AD). At present, there is no effective treatment for AD. In this study, we reported the effects of gold nanoparticles surface-functionalized with a plant-based amino acid mimosine (Mimo-AuNPs), which is found to cross the blood-brain barrier, on the Aβ fibrillization process and toxicity. Thioflavin T kinetic assays, fluorescence imaging and electron microscopy data showed that Mimo-AuNPs were able to suppress the spontaneous and seed-induced Aβ1-42 aggregation. Spectroscopic studies, molecular docking and biochemical analyses further revealed that Mimo-AuNPs stabilize Aβ1-42 to remain in its monomeric state by interacting with the hydrophobic domain of Aβ1-42 (i.e., Lys16 to Ala21) there by preventing a conformational shift towards the β-sheet structure. Additionally, Mimo-AuNPs were found to trigger the disassembly of matured Aβ1-42 fibers and increased neuronal viability by reducing phosphorylation of tau protein and the production of oxyradicals. Collectively, these results reveal that the surface-functionalization of gold nanoparticles with mimosine can attenuate Aβ fibrillization and neuronal toxicity. Thus, we propose Mimo-AuNPs may be used as a potential treatment strategy towards AD-related pathologies. Mimosine functionalized with gold nanoparticles (Mimo-AuNPs) can cross blood-brain barrier. Mimo-AuNPs inhibit aggregation of Aβ peptides by interacting with its hydrophobic domain. Mimo-AuNPs can trigger disassembly of pre-aggregated Aβ fibers. Mimo-AuNPs can protect neurons against Aβ toxicity by attenuating intracellular signaling.
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Affiliation(s)
- Bibin G Anand
- Departments of Medicine and University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
| | - Qi Wu
- Departments of Medicine and University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
| | - Govindarajan Karthivashan
- Departments of Medicine and University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
| | - Kiran P Shejale
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, India
| | - Sara Amidian
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Departments of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
| | - Holger Wille
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Departments of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
| | - Satyabrata Kar
- Departments of Medicine and University of Alberta, Edmonton, Alberta, T6G 2M8, Canada.,Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, T6G 2M8, Canada
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Liu X, Chang L, Yang Z, Zhao S, Chen X, Dai B. Synthesis, Structures, and Interactions with CT-DNA/BSA of Three New Acylhydrazones Containing Oxazole Ring. HETEROCYCLES 2021. [DOI: 10.3987/com-20-14355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Liu R, Wu L, Feng H, Tang F, Si H, Yao X, He W. The study on the interactions of two 1,2,3-triazoles with several biological macromolecules by multiple spectroscopic methodologies and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118795. [PMID: 32814256 DOI: 10.1016/j.saa.2020.118795] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/18/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
1-(4-chlorophenyl)-5-phenyl-1H-1,2,3-triazole (CPTC) and 5-(3-chlorophenyl) -1-phenyl-1H-1,2,3-triazole (PCTA) are two new derivatives of 1,2,3-triazole. Their structural and spectral properties were characterized by density functional theory calculations (DFT). The binding properties of CPTC or PCTA with several typical biomacromolecules such as human serum albumin (HSA), bovine hemoglobin (BHb), human immunoglobulin (HIgG) or DNA were investigated by molecular docking and multiple spectroscopic methodologies. The different parameters including binding constants and thermodynamic parameters for CPTC/PCTA-HSA/BHb/HIgG/DNA systems were obtained based on various fluorescence enhancement or quenching mechanisms. The results of binding constants indicated that there were the strong interactions between two triazoles and four biological macromolecules due to the higher order of magnitude between 103 and 105. The values of thermodynamic parameters revealed that the binding forces for these systems are mainly hydrophobic interactions, electrostatic force, or hydrogen bond, respectively, which are in agreement with the results of molecular docking to a certain extent. Moreover, the information from synchronous, 3D fluorescence and UV-Vis spectroscopies proved that two compounds CPTC and PCTA could affect the microenvironment of amino acids residues of three kinds of proteins. Based on the above experimental results, a comparison of the interaction mechanisms for CPTC/PCTA-proteins/DNA systems have been performed in view of their different molecular structures, which is beneficial for the further research in order to design them as the novel drugs.
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Affiliation(s)
- Rongqiang Liu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Luyong Wu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Huajie Feng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Fengqi Tang
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China
| | - Hongzong Si
- Institute for Computational Science and Engineering, Qingdao University, 266071 Qingdao, China
| | - Xiaojun Yao
- College of Chemical and Chemical Engineering, Lanzhou University, 730000 Lanzhou, China
| | - Wenying He
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, 571158 Haikou, China.
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Ji C, Yin X, Duan H, Liang L. Molecular complexes of calf thymus DNA with various bioactive compounds: Formation and characterization. Int J Biol Macromol 2020; 168:775-783. [PMID: 33227330 DOI: 10.1016/j.ijbiomac.2020.11.135] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/18/2020] [Accepted: 11/18/2020] [Indexed: 10/22/2022]
Abstract
The interaction between biomacromolecules and ligands has attracted great interest because of their biological properties. Calf thymus DNA (ctDNA) can interact with bioactive compounds to form complexes. Here, ctDNA-ligand complexes were studied using fluorescence, absorption, and infrared spectroscopy, circular dichroism, ABTS assay and competitive displacement. The binding constants of bioactive compounds at the intercalative site of ctDNA ranked in order kaempferol > apigenin > quercetin > curcumin > riboflavin, while the binding constants at minor groove sites ranked quercetin > kaempferol > naringenin ~ apigenin > hesperetin > curcumin ~ resveratrol ~ riboflavin > caffeic acid. CtDNA maintained stable B-form with an enhancement of base stacking and a decrease of right-handed helicity in the presence of these bioactive compounds, except for hesperetin and caffeic acid. Bioactive compounds preferentially bound to guanine bases and tended to transfer into a more hydrophobic environment upon complexation with ctDNA. The DNA complexation did not affect the ABTS·+ scavenging capacity of quercetin, kaempferol, resveratrol and apigenin but increased the ones of naringenin, caffeic acid, curcumin, hesperetin and riboflavin. The data gathered here should be useful to understand the binding modes of DNA with ligands for their potential application in pharmaceutical and food industries.
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Affiliation(s)
- Chuye Ji
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Xin Yin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China.
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12
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Synthesis of aryl linked binuclear silver N-heterocyclic carbene complexes, DNA interaction study and biological potentials. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108077] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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13
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Lachowicz JI, Dalla Torre G, Cappai R, Randaccio E, Nurchi VM, Bachor R, Szewczuk Z, Jaremko L, Jaremko M, Pisano MB, Cosentino S, Orrù G, Ibba A, Mujika J, Lopez X. Metal self-assembly mimosine peptides with enhanced antimicrobial activity: towards a new generation of multitasking chelating agents. Dalton Trans 2020; 49:2862-2879. [DOI: 10.1039/c9dt04545g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Mimosine is a non-protein amino acid that can be used as a building block in peptides with metal coordination ability.
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Luo YJ, Wang BL, Kou SB, Lin ZY, Zhou KL, Lou YY, Shi JH. Assessment on the binding characteristics of dasatinib, a tyrosine kinase inhibitor to calf thymus DNA: insights from multi-spectroscopic methodologies and molecular docking as well as DFT calculation. J Biomol Struct Dyn 2019; 38:4210-4220. [PMID: 31581883 DOI: 10.1080/07391102.2019.1676824] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The binding characteristics of calf thymus DNA (ct-DNA) with dasatinib (DSTN), a tyrosine kinase inhibitor was assessed through multi-spectroscopic methodologies and viscosity measurement combined with molecular docking as well as DFT calculation to understand the binding mechanism, affinity of DSTN onto ct-DNA, effect of DSTN on ct-DNA conformation, and among others. The results confirmed DSTN bound onto ct-DNA, leading to forming the DSTN-ct-DNA complex with the binding constant of 4.82 × 103 M-1 at 310 K. DSTN preferentially inserted to the minor groove of ct-DNA with rich A-T region, that was the binding mode of DSTN onto ct-DNA was groove binding. The enthalpic change (ΔH0) and entropic change (ΔS0) during the binding process of DSTN with ct-DNA were 128.9 kJ mol-1 and 489.2 J mol-1 K-1, respectively, confirming clearly that the association of DSTN with ct-DNA was an endothermic process and the dominative driven-force was hydrophobic interaction. Meanwhile, the results also indicated that there was a certain extent of electrostatic force and hydrogen bonding, but they maybe play an auxiliary role. The CD measurement results confirmed the alteration in the helical configuration of ct-DNA but almost no change in the base stacking after binding DSTN. The results revealed that there was the obvious change in the conformation, the dipole moment, and the atomic charge distribution of DSTN in the B-DNA complexes, compared with free DSTN, to satisfy the conformational adaptation. From the obtained fronitier molecular orbitals of DSTN, it can be inferred that the nature of DSTN alters with the change of the environment around DSTN. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Yu-Jie Luo
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Bao-Li Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Song-Bo Kou
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Zhen-Yi Lin
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Kai-Li Zhou
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Yan-Yue Lou
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Jie-Hua Shi
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
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Lactoferrin-phenothiazine dye interactions: Thermodynamic and kinetic approach. Int J Biol Macromol 2019; 136:559-569. [DOI: 10.1016/j.ijbiomac.2019.06.097] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/31/2019] [Accepted: 06/13/2019] [Indexed: 01/12/2023]
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16
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Topkaya SN, Cetin AE. Determination of Electrochemical Interaction between 2‐(1H‐benzimidazol‐2‐yl) Phenol and DNA Sequences. ELECTROANAL 2019. [DOI: 10.1002/elan.201900199] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Seda Nur Topkaya
- Department of Analytical Chemistry, Faculty of PharmacyIzmir Katip Celebi University 35620, Cigli Izmir TURKEY
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Nan Z, Hao C, Ye X, Feng Y, Sun R. Interaction of graphene oxide with bovine serum albumin: A fluorescence quenching study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 210:348-354. [PMID: 30476875 DOI: 10.1016/j.saa.2018.11.028] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/23/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Fluorescence quenching was used to elucidate the binding interaction mechanism between bovine serum albumin (BSA) and graphene oxide (GO). By analyzing the values of Stern-Volmer quenching constant (KSV) and binding constant (KA) which were affected by temperature, we supposed that the quenching process between GO and BSA was mainly determined by static quenching, combined with dynamic quenching. The study of thermodynamics showed that the values of enthalpy change (∆H), entropy change (∆S) and Free Energy (∆G) were all negative, which implied that the weak interaction of the molecular between BSA and GO was Van der Waals interaction or hydrogen bond, and the quenching process was exothermic and spontaneous. The red shift in the synchronous fluorescence spectra suggested that the conformation of tryptophan was changed in the presence of GO. According to Förster's non-radiative energy transfer theory, the distance r between BSA (donor) and GO (acceptor) was calculated and indicated the occurrence of energy transfer from BSA to GO had high probability. The AFM observation and Raman spectroscopy revealed that the interaction between BSA and GO has occurred. Compared with other literatures, the explosion of surface topography about BSA and GO was paid more attention on in this study.
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Affiliation(s)
- Zhezhu Nan
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Changchun Hao
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Xiaoqi Ye
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Ying Feng
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Runguang Sun
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
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