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Daksh S, Gond C, Kumar N, Kaur L, Ojha H, Deep S, Datta A. Binding studies of potential amyloid-β inhibiting chalcone derivative with bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123362. [PMID: 37774582 DOI: 10.1016/j.saa.2023.123362] [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: 05/28/2023] [Revised: 08/23/2023] [Accepted: 09/04/2023] [Indexed: 10/01/2023]
Abstract
Chalcones (α-phenyl-β-benzoylethylene) and their natural-source derivatives have been investigated for their remarkable biological activities, like neuroprotective, anti-inflammatory, and anti-tumor properties. A triazole chalcone ligand (E)-3-(4-(dimethylamino)phenyl)-1-(4-((1-(2-(4-((E)-3-(4(dimethylamino)phenyl)acryloyl)phenoxy)ethyl)-1H-1,2,3-triazol-4-yl)methoxy)phenyl)prop-2-en-1-one (L1) was synthesized by Cu(I)- catalysed click reaction. The mechanistic properties of L1 for therapy were evaluated by analyzing the binding interactions between L1 and bovine serum albumin (BSA) through photophysical and computational studies. The structural elucidation of ligand L1 was carried out by NMR and mass spectrometry. The Aβ inhibitory activity of L1 was studied by thioflavin T assay and transmission electron microscopy. The biomolecular interaction of L1 with bovine serum albumin was examined through multi-spectroscopic techniques in combination with in silico studies. UV-Visible absorption, fluorescence spectroscopy, circular dichroism, Förster resonance energy transfer, and three-dimensional fluorescence studies confirmed the formation of a BSA-L1 complex. The potential binding sites, mechanism of interactions, and variations in the environment of tyrosine and tryptophan amino acid residues of BSA were assessed at different temperatures. The binding constant for the Static quenching mechanism of intrinsic fluorescence of BSA was of the order of 105 M-1. The esterase enzyme activity assay in the presence of L1 revealed an increase in the protein enzyme activity. Molecular docking studies suggested L1 was predominantly bound to BSA by hydrogen bonds and Van der Waals forces.
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Affiliation(s)
- Shivani Daksh
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig S. K. Mazumdar Marg, Delhi 110054, India; Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Chandraprakash Gond
- Department of Chemistry, Babasaheb Bhimrao Ambedkar University, Lucknow 226025, Uttar Pradesh, India
| | - Nikhil Kumar
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig S. K. Mazumdar Marg, Delhi 110054, India; Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Lajpreet Kaur
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig S. K. Mazumdar Marg, Delhi 110054, India
| | - Himanshu Ojha
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig S. K. Mazumdar Marg, Delhi 110054, India
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India.
| | - Anupama Datta
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Brig S. K. Mazumdar Marg, Delhi 110054, India.
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Chaves OA, Calheiro TP, Netto-Ferreira JC, de Oliveira MC, Franceschini SZ, de Salles CMC, Zanatta N, Frizzo CP, Iglesias BA, Bonacorso HG. Biological assays of BF2-naphthyridine compounds: Tyrosinase and acetylcholinesterase activity, CT-DNA and HSA binding property evaluations. Int J Biol Macromol 2020; 160:1114-1129. [DOI: 10.1016/j.ijbiomac.2020.05.162] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 01/30/2023]
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Synthetic ( E)-3-Phenyl-5-(phenylamino)-2-styryl-1,3,4-thiadiazol-3-ium Chloride Derivatives as Promising Chemotherapy Agents on Cell Lines Infected with HTLV-1. Molecules 2020; 25:molecules25112537. [PMID: 32486038 PMCID: PMC7321218 DOI: 10.3390/molecules25112537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/20/2020] [Accepted: 05/26/2020] [Indexed: 12/24/2022] Open
Abstract
Synthesis of four compounds belonging to mesoionic class, (E)-3-phenyl-5-(phenylamino)-2-styryl-1,3,4-thiadiazol-3-ium chloride derivatives (5a–d) and their biological evaluation against MT2 and C92 cell lines infected with human T-cell lymphotropic virus type-1 (HTLV-1), which causes adult T-cell leukemia/lymphoma (ATLL), and non-infected cell lines (Jurkat) are reported. The compounds were obtained by convergent synthesis under microwave irradiation and the cytotoxicity was evaluated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays. Results showed IC50 values of all compounds in the range of 1.51–7.70 μM in HTLV-1-infected and non-infected cells. Furthermore, it was observed that 5b could induce necrosis after 24 h for Jurkat and MT2 cell lines. The experimental (fluorimetric method) and theoretical (molecular docking) results suggested that the mechanism of action for 5b could be related to its capacity to intercalate into DNA. Moreover, the preliminary pharmacokinetic profile of the studied compounds (5a–d) was obtained through human serum albumin (HSA) binding affinity using multiple spectroscopic techniques (circular dichroism, steady-state and time-resolved fluorescence), zeta potential and molecular docking calculations. The interaction HSA:5a–d is spontaneous and moderate (Ka ~ 104 M−1) via a ground-state association, without significantly perturbing both the secondary and surface structures of the albumin in the subdomain IIA (site I), indicating feasible biodistribution in the human bloodstream.
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Novel 2,4-Disubstituted-1,3-Thiazole Derivatives: Synthesis, Anti- Candida Activity Evaluation and Interaction with Bovine Serum Albumine. Molecules 2020; 25:molecules25051079. [PMID: 32121062 PMCID: PMC7179180 DOI: 10.3390/molecules25051079] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 12/29/2022] Open
Abstract
Herein we report the synthesis of two novel series of 1,3-thiazole derivatives having a lipophilic C4-substituent on account of the increasing need for novel and versatile antifungal drugs for the treatment of resistant Candida sp.-based infections. Following their structural characterization, the anti-Candida activity was evaluated in vitro while using the broth microdilution method. Three compounds exhibited lower Minimum Inhibitory Concentration (MIC) values when compared to fluconazole, being used as the reference antifungal drug. An in silico molecular docking study was subsequently carried out in order to gain more insight into the antifungal mechanism of action, while using lanosterol-C14α-demethylase as the target enzyme. Fluorescence microscopy was employed to further investigate the cellular target of the most promising molecule, with the obtained results confirming its damaging effect towards the fungal cell membrane integrity. Finally, the distribution and the pharmacological potential in vivo of the novel thiazole derivatives was investigated through the study of their binding interaction with bovine serum albumin, while using fluorescence spectroscopy.
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Singh N, Kumar N, Rathee G, Sood D, Singh A, Tomar V, Dass SK, Chandra R. Privileged Scaffold Chalcone: Synthesis, Characterization and Its Mechanistic Interaction Studies with BSA Employing Spectroscopic and Chemoinformatics Approaches. ACS OMEGA 2020; 5:2267-2279. [PMID: 32064388 PMCID: PMC7016911 DOI: 10.1021/acsomega.9b03479] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/15/2020] [Indexed: 05/28/2023]
Abstract
Chalcone, a privileged structure, is considered as an effective template in the field of medicinal chemistry for potent drug discovery. In the present study, a privileged template chalcone was designed, synthesized, and characterized by various spectroscopic techniques (NMR, high-resolution mass spectrometry, Fourier transform infrared (FT-IR) spectroscopy, UV spectroscopy, and single-crystal X-ray diffraction). The mechanism of binding of chalcone with bovine serum albumin (BSA) was determined by multispectroscopic techniques and computational methods. Steady-state fluorescence spectroscopy suggests that the intrinsic fluorescence of BSA was quenched upon the addition of chalcone by the combined dynamic and static quenching mechanism. Time-resolved spectroscopy confirms complex formation. FT-IR and circular dichroism spectroscopy suggested the presence of chalcone in the BSA molecule microenvironment and also the possibility of rearrangement of the native structure of BSA. Moreover, molecular docking studies confirm the moderate binding of chalcone with BSA and the molecular dynamics simulation analysis shows the stability of the BSA-drug complex system with minimal deformability fluctuations and potential interaction by the covariance matrix. Moreover, pharmacodynamics and pharmacological analysis show good results through Lipinski rules, with no toxicity profile and high gastrointestinal absorptions by boiled egg permeation assays. This study elucidates the mechanistic profile of the privileged chalcone scaffold to be used in therapeutic applications.
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Affiliation(s)
- Nidhi Singh
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Neeraj Kumar
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Garima Rathee
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Damini Sood
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Aarushi Singh
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Vartika Tomar
- Department
of Chemistry, University of Delhi, Delhi 110007, India
| | - Sujata K. Dass
- BLK
Super Speciality Hospital, Pusa Road, Delhi, New Delhi 110005, India
| | - Ramesh Chandra
- Department
of Chemistry, University of Delhi, Delhi 110007, India
- Dr.
B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
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Multi-Spectroscopic and Theoretical Analysis on the Interaction between Human Serum Albumin and a Capsaicin Derivative-RPF101. Biomolecules 2018; 8:biom8030078. [PMID: 30142945 PMCID: PMC6164054 DOI: 10.3390/biom8030078] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 08/13/2018] [Accepted: 08/16/2018] [Indexed: 02/07/2023] Open
Abstract
The interaction between the main carrier of endogenous and exogenous compounds in the human bloodstream (human serum albumin, HSA) and a potential anticancer compound (the capsaicin analogue RPF101) was investigated by spectroscopic techniques (circular dichroism, steady-state, time-resolved, and synchronous fluorescence), zeta potential, and computational method (molecular docking). Steady-state and time-resolved fluorescence experiments indicated an association in the ground state between HSA:RPF101. The interaction is moderate, spontaneous (ΔG° < 0), and entropically driven (ΔS° = 0.573 ± 0.069 kJ/molK). This association does not perturb significantly the potential surface of the protein, as well as the secondary structure of the albumin and the microenvironment around tyrosine and tryptophan residues. Competitive binding studies indicated Sudlow’s site I as the main protein pocket and molecular docking results suggested hydrogen bonding and hydrophobic interactions as the main binding forces.
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Jamshidi S, Hejazi N, Zimorovat AR. Nutritional Status in Patients with Gastrointestinal Cancer in Comparison To Other Cancers In Shiraz, Southern Iran: a Case-Control Study. World J Plast Surg 2018; 7:186-192. [PMID: 30083501 PMCID: PMC6066704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Malnutrition leads to decreased survival rate, quality of life and the response to treatment and increases the risk of mortality in patients with cancer. Clinical evaluation is essential for ontime detection and treatment of malnutrition in these patients. On the other hand, patients with gastrointestinal (GI) cancers are expected to have a higher risk of malnutrition due to the poor digestion and malabsorption. Therefore, the purpose of this study was to compare the nutritional status in patients with GI tract cancers with non-GI cancers. METHODS Sixty-nine patients with GI cancers and 65 patients with other types of cancer participated in this case-control study. Anthropometric evaluation [weight, body mass index (BMI)], mid arm circumference, calf circumference) and biochemical indices [albumin, C-Reactive Protein (CRP)] were measured and the Subjective Global Assessment (SGA) questionnaire was completed to assess the nutritional status of the patients. RESULTS BMI, weight and serum albumin levels were significantly lower in patients with GI cancers. Other anthropometric measurements were lower in the case group and the serum CRP level was higher than the control group, although they were not statistically significant. The incidence of malnutrition was higher in case group compared to the control group, but it was not statistically significant. CONCLUSION Anthropometric, biochemical and SGA evaluation showed a poor nutritional status in patients with GI cancer compared to other forms of cancer. Therefore, early assessment of the nutritional status of patients with cancer can be effective in order to initiate a nutritional intervention.
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Affiliation(s)
- Sanaz Jamshidi
- Student Research Committee, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Najmeh Hejazi
- Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran,Corresponding Author: Najmeh Hejazi, Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran, Tel: +98-71-37251001, E-mail: ,
| | - Ali Reza Zimorovat
- Student Research Committee, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Chaves OA, Jesus CSH, Henriques ES, Brito RMM, Serpa C. In situ ultra-fast heat deposition does not perturb the structure of serum albumin. Photochem Photobiol Sci 2018; 15:1524-1535. [PMID: 27841431 DOI: 10.1039/c6pp00209a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MnTPPS is a metallic water soluble porphyrin with high potential to be used as a contrast agent in photoacoustic tomography. In order to fully understand the interaction between MnTPPS and serum albumin and to investigate the effect of the light induced fast in situ heat deposition by MnTPPS in the protein, we performed several experimental studies using fluorescence and circular dichroism spectroscopies, as well as photoacoustic calorimetry. To identify the possible binding site(s) of the metalloporphyrin in serum albumin and to help interpret the spectroscopic results, a molecular docking exercise was also carried out. The fluorescence data indicate a 1 : 1 stoichiometry for the complex BSA : MnTPPS. The molecular docking results suggest one binding site at the subdomain IB of albumin, where Trp-134 is found, as the main binding site for MnTPPS. The CD data indicate no significant conformational changes of the BSA secondary structure upon MnTPPS binding and even after several minutes of laser excitation of MnTPPS. TR-PAC results show that the in situ heat deposition from MnTPPS does not cause any significant transient conformational change to the BSA structure. In conclusion, this work demonstrates that MnTPPS, in addition to the necessary physical and chemical properties to be used as a contrast agent in photoacoustic tomography, can be effectively carried by albumin and that in situ heat release following light absorption does not cause any significant damage to the protein structure.
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Affiliation(s)
- Otávio A Chaves
- ICE, Chemistry Department, Universidade Federal Rural do Rio de Janeiro, 23890-000, Seropédica-RJ, Brazil and CQC, Chemistry Department, University of Coimbra, 3004-535, Coimbra, Portugal.
| | - Catarina S H Jesus
- CQC, Chemistry Department, University of Coimbra, 3004-535, Coimbra, Portugal.
| | - Elsa S Henriques
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Rui M M Brito
- CQC, Chemistry Department, University of Coimbra, 3004-535, Coimbra, Portugal.
| | - Carlos Serpa
- CQC, Chemistry Department, University of Coimbra, 3004-535, Coimbra, Portugal.
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9
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Lopes ND, Chaves OA, de Oliveira MCC, Sant'Anna CMR, Sousa-Pereira D, Netto-Ferreira JC, Echevarria A. Novel piperonal 1,3,4-thiadiazolium-2-phenylamines mesoionic derivatives: Synthesis, tyrosinase inhibition evaluation and HSA binding study. Int J Biol Macromol 2018; 112:1062-1072. [PMID: 29447969 DOI: 10.1016/j.ijbiomac.2018.02.050] [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] [Received: 07/25/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 01/15/2023]
Abstract
A novel series of piperonal mesoionic derivatives (PMI 1-6) was synthesized. Tyrosinase inhibition in the presence of PMI-1, -2, -3, -4, -5 and -6 as well as human serum albumin (HSA) binding studies with PMI-5 and PMI-6 were done by spectroscopic and theoretical methods. The mesoionic compound PMI-5 is the most promising tyrosinase inhibitor with a noncompetitive inhibitory mechanism and an IC50=124μmolL-1. In accordance with the kinetic profile, molecular docking results show that PMI-5 is able to interact favorably with the tyrosinase active site containing the substrate molecule, L-DOPA, interacting with Val-247, Phe-263 and Val-282 residues. The spectroscopic results for the interaction HSA:PMI-5 and HSA:PMI-6 indicated that these mesoionic compounds can associate with HSA in the ground state and energy transfer can occur with high probability. The binding was moderate, spontaneous and can perturb significantly the secondary structure of the albumin. The molecular docking results suggest that PMI-5 and PMI-6 are able to be accommodated inside the Sudlow's site I in HSA, interacting with hydrophobic and hydrophilic amino acid residues.
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Affiliation(s)
- Natália Drumond Lopes
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil
| | - Otávio Augusto Chaves
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil
| | - Márcia C C de Oliveira
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil
| | - Carlos Mauricio R Sant'Anna
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil
| | - Danilo Sousa-Pereira
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil
| | - José Carlos Netto-Ferreira
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil.
| | - Aurea Echevarria
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, 23970-000 Seropédica, RJ, Brazil.
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Chaves OA, Mathew B, Cesarin-Sobrinho D, Lakshminarayanan B, Joy M, Mathew GE, Suresh J, Netto-Ferreira JC. Spectroscopic, zeta potential and molecular docking analysis on the interaction between human serum albumin and halogenated thienyl chalcones. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.091] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chaves OA, Jesus CSH, Cruz PF, Sant'Anna CMR, Brito RMM, Serpa C. Evaluation by fluorescence, STD-NMR, docking and semi-empirical calculations of the o-NBA photo-acid interaction with BSA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 169:175-181. [PMID: 27376757 DOI: 10.1016/j.saa.2016.06.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 06/03/2016] [Accepted: 06/17/2016] [Indexed: 06/06/2023]
Abstract
Serum albumins present reversible pH dependent conformational transitions. A sudden laser induced pH-jump is a methodology that can provide new insights on localized protein (un)folding processes that occur within the nanosecond to microsecond time scale. To generate the fast pH jump needed to fast-trigger a protein conformational event, a photo-triggered acid generator as o-nitrobenzaldehyde (o-NBA) can be conveniently used. In order to detect potential specific or nonspecific interactions between o-NBA and BSA, we have performed ligand-binding studies using fluorescence spectroscopy, saturation transfer difference (STD) NMR, molecular docking and semi-empirical calculations. Fluorescence quenching indicates the formation of a non-fluorescent complex in the ground-state between the fluorophore and the quencher, but o-NBA does not bind much effectively to the protein (Ka~4.34×10(3)M(-1)) and thus can be considered a relatively weak binder. The corresponding thermodynamic parameters: ΔG°, ΔS° and ΔH° showed that the binding process is spontaneous and entropy driven. Results of (1)H STD-NMR confirm that the photo-acid and BSA interact, and the relative intensities of the signals in the STD spectra show that all o-NBA protons are equally involved in the binding process, which should correspond to a nonspecific interaction. Molecular docking and semi-empirical calculations suggest that the o-NBA binds preferentially to the Trp-212-containing site of BSA (FA7), interacting via hydrogen bonds with Arg-217 and Tyr-149 residues.
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Affiliation(s)
- Otávio A Chaves
- Departament of Chemistry, Universidade Federal Rural do Rio de Janeiro, BR 465, km 47, 23890-000 Seropédica, RJ, Brazil; CQC, Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Catarina S H Jesus
- CQC, Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal; Center for Neuroscience and Cell Biology, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Pedro F Cruz
- CQC, Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Carlos M R Sant'Anna
- Departament of Chemistry, Universidade Federal Rural do Rio de Janeiro, BR 465, km 47, 23890-000 Seropédica, RJ, Brazil
| | - Rui M M Brito
- Departament of Chemistry, Universidade Federal Rural do Rio de Janeiro, BR 465, km 47, 23890-000 Seropédica, RJ, Brazil; CQC, Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Carlos Serpa
- CQC, Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal.
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Study on the interaction of bioactive compound S-allyl cysteine from garlic with serum albumin. J Food Drug Anal 2016; 25:385-390. [PMID: 28911681 PMCID: PMC9332522 DOI: 10.1016/j.jfda.2016.08.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 08/17/2016] [Accepted: 08/31/2016] [Indexed: 01/26/2023] Open
Abstract
Multispectroscopic techniques were used to investigate the interaction of S-allyl cysteine (SAC) from garlic with human serum albumin (HSA). UV–Vis absorption measurements prove the formation of the HSA–SAC complex. An analysis of fluorescence spectra revealed that in the presence of SAC, the quenching mechanism of HSA is considered static. The quenching rate constant Kq, KSV, and the binding constant KA were estimated. According to the Van’t Hoff equation, the thermodynamic parameters enthalpy change (ΔH) and entropy change (ΔS) were calculated to be −1.00 × 105 J/mol and −255 J/mol/K, respectively. These indicate that hydrogen bonds and van der Waals forces are the major forces between SAC and HSA. The changes in the secondary structure of HSA, which was induced by SAC, were determined by circular dichroism spectroscopy. Energy transfer was confirmed and the distance between donor and acceptor was calculated to be 2.83 nm.
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Yu H, Li D, Xu F, Pan Q, Chai P, Liu B, Chen C. The binding affinity of human serum albumin and paclitaxel through MMPBSA based on docked complex. MOLECULAR SIMULATION 2016. [DOI: 10.1080/08927022.2016.1198479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Pawar SK, Vavia P. Efficacy Interactions of PEG-DOX-N-acetyl Glucosamine Prodrug Conjugate for Anticancer Therapy. Eur J Pharm Biopharm 2016; 97:454-63. [PMID: 26614563 DOI: 10.1016/j.ejpb.2015.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 07/02/2015] [Accepted: 07/13/2015] [Indexed: 12/17/2022]
Abstract
Present investigation is exploring structure-biocompatibility interaction of tumour targeted polyethylene glycol (PEG) based drug conjugate of doxorubicin using N-acetyl glucosamine as targeting ligand. The synthesized polymer drug conjugate was evaluated for particle size, zeta potential, molecular weight, haemolysis activity, cytotoxicity, protein binding and in vitro receptor (lectin) binding study. The particle size of synthesized conjugate was observed to be around 30 nm with polydispersability index of 0.213 indicating mono-disperse particles. Fluorescence quenching assay addressed relatively lower binding interactions of polymer drug conjugate to bovine serum albumin in comparison with free doxorubicin which may be governed to the hydrophilicity of polyethylene glycol and N-acetyl glucosamine. The cell compatibility and haemolysis study showed that PEG drug conjugate was nontoxic and biocompatible, which recommends the suitability of polymer drug conjugates for delivering biological active agents systemically. In vitro ligand-lectin receptor binding assays of synthesized targeted polymer conjugate suggest the possibility of promising interaction of N-acetyl glucosamine in vivo. Thus, the study indicated the suitability of N-acetyl glucosamine anchored targeted polymer drug conjugate in delivering bio-therapeutics for specifically targeting to tumour tissues.
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Affiliation(s)
- Smita K Pawar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, University Under Section 3 of UGC Act 1956, Elite Status and Centre of Excellence - Govt. of Maharashtra, TEQIP Phase II Funded, Mumbai 400 019, India
| | - Pradeep Vavia
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, University Under Section 3 of UGC Act 1956, Elite Status and Centre of Excellence - Govt. of Maharashtra, TEQIP Phase II Funded, Mumbai 400 019, India.
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Wei Y, Niu L, Liu X, Zhou H, Dong H, Kong D, Li Y, Li Q. Spectroscopic studies and molecular docking on the interaction of organotin antitumor compound bis[2,4-difluoro-N-(hydroxy-⟨κ⟩O)benzamidato-⟨κ⟩O]diphenyltin(IV) with human cytochrome P450 3A4 protease. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 163:154-161. [PMID: 27049867 DOI: 10.1016/j.saa.2016.03.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/11/2016] [Accepted: 03/15/2016] [Indexed: 06/05/2023]
Abstract
A novel organotin DFDPT was synthesized and characterized by elemental analysis, IR, (1)H, (13)C, (119)Sn, NMR techniques,etc. In order to investigate profoundly the relationship between DFDPT with human CYP3A4 proteaset and anticancer molecular mechanism of DFDPT, the intercalative mode of binding of DFDPT with CYP3A4 under physiological conditions were comprehensively evaluated using steady state, synchronous, three-dimensional fluorescence spectroscopy,circular dichroism and molecular docking. Fluorescence emission data showed that CYP3A4 fluorescence affected by DFDPT was a static quenching procedure, which implied that DFDPT-CYP3A4 complex had been formed. Apparent binding constants Kb of CYP3A4 with compound at 298 and 310K were 2.51×10(7) and 3.09×10(5), respectively. The binding sites number n was 1.64 and 1.22, respectively. The thermodynamic parameters ΔH and ΔS of the DFDPT-CYP3A4 complex were negative, which indicated that their interaction was driven mainly by hydrogen bonding and van der Waals force. The binding of DFDPT-CYP3A4 was spontaneous process in which ΔG was negative. The synchronous results showed DFDPT induced conformational changes of CYP3A4 protein. Three-dimensional fluorescence and circular dichroism spectra results also revealed conformation of CYP3A4 protein had been possible changed in the presence of DFDPT. Molecular docking was used to study the interaction orientation between DFDPT and CYP3A4 protease. The results indicated that DFDPT interacted with a panel of amino acids in the active sites of CYP3A4 protein mainly through formation of hydrogen bond. Furthermore, the predicted binding mode of DFDPT into CYP3A4 appeared to adopt an orientation with interactions among Arg105, Ser119 and Thr309.
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Affiliation(s)
- Ying Wei
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Lin Niu
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Xinxin Liu
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Hongyan Zhou
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Hongzhou Dong
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Depeng Kong
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Yunlan Li
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China.
| | - Qingshan Li
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 030001, PR China.
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16
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Mohseni-Shahri FS, Housaindokht MR, Bozorgmehr MR, Moosavi-Movahedi AA. Comparative study of the effects of the structurally similar flavonoids quercetin and taxifolin on the therapeutic behavior of alprazolam. CAN J CHEM 2016. [DOI: 10.1139/cjc-2015-0177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
After a meal rich in plant products, dietary flavonoids can be detected in plasma as serum albumin bound conjugates. Flavonoid–albumin binding is expected to control the bioavailability of drugs. In this study, the binding of alprazolam (ALP) and human serum albumin (HSA) has been investigated in the absence and presence of two flavonoids with similar structures, quercetin (QUER) and taxifolin (TAX), by means of fluorescence spectroscopy, chemometrics, and molecular dynamics simulation. Our results show that ALP has the ability to quench the intrinsic fluorescence of HSA. This quenching is affected by flavonoids. The presence of QUER and TAX decreased the quenching constants, binding constants, and equilibrium constants associated with ALP binding to HSA. The effect of ALP and both flavonoids on the conformation of HSA was analyzed using synchronous fluorescence spectroscopy. Our results indicate a conformational change of HSA with the addition of ligands. The molecular dynamics study makes an important contribution to understanding the effect of the binding of ALP, QUER, and TAX on conformational changes of HSA and modification of its tertiary structure in the absence and presence of flavonoids. All of these results may have relevant consequences in rationalizing the interferences of common food and drugs.
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17
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Banipal TS, Kaur A, Khan IA, Banipal PK. Exploring the thermodynamics and conformational aspects of nicotinic acid binding with bovine serum albumin: a detailed calorimetric, spectroscopic and molecular docking study. RSC Adv 2016. [DOI: 10.1039/c5ra28028a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
An attempt to obtain a physicochemical and conformational outlook on the binding interaction of vitamin B3 (NA) with a model transport protein BSA using calorimetry, light scattering, molecular docking, and spectroscopic techniques.
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Affiliation(s)
| | - Amandeep Kaur
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar – 143005
- India
| | - Imran Ahmd Khan
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar – 143005
- India
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18
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Yousefi R, Taheri-Kafrani A, Nabavizadeh SM, Pouryasin Z, Shahsavani MB, Khoshaman K, Rashidi M. The binding assessment with human serum albumin of novel six-coordinate Pt(IV) complexes, containing bidentate nitrogen donor/methyl ligands. MOLECULAR BIOLOGY RESEARCH COMMUNICATIONS 2015; 4:167-179. [PMID: 27844009 PMCID: PMC5019209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The interactions between platinum complexes and human serum albumin (HSA) play crucial roles in the distribution, metabolism, and activity of platinum-based anticancer drugs. Octahedral platinum (IV) complexes represent a significant class of anticancer agents that display molecular pharmacological properties different from cisplatin. In this study, the interaction between two Pt(IV) complexes with the general formula [Pt(X)2Me2 (tbu2bpy)], where tbu2bpy = 4,4'-ditert-butyl-2,2'-bipyridine, with two leaving groups of X = Cl (Com1) or Br (Com2), and HSA were investigated, using Ultraviolet-Visible (UV-Vis) spectroscopy, fluorescence spectroscopy, circular dichroism (CD) and molecular docking simulation. The spectroscopic and thermodynamic data revealed that the HSA/Pt(IV) complexes interactions were spontaneous process and Com2 demonstrated stronger interaction and binding constant in comparison with Com1. Also, the results suggest approximately similar structural alteration of HSA in the presence of these Pt complexes. Molecular docking revealed that both Pt(IV) complexes bind with HSA in subdomain IB, literally the same as each other. This study suggests that variation in the leaving group, displaying differing departure rate, has no significant contribution in denaturing prosperities of the Pt(IV) complexes against HSA.
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Affiliation(s)
- Reza Yousefi
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran,Address for correspondence: Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran ,Tel: +98-7116137617, +98-7116137665, Fax: +98-7112280916, E. mail:
| | - Asghar Taheri-Kafrani
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 81746-73441, Iran
| | | | - Zahra Pouryasin
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Mohammad Bagher Shahsavani
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Kazem Khoshaman
- Protein Chemistry Laboratory (PCL), Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Mehdi Rashidi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, Iran
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19
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Mozzicafreddo M, Cuccioloni M, Bonfili L, Cecarini V, Palermo FA, Cocci P, Mosconi G, Capone A, Ricci I, Eleuteri AM, Angeletti M. Environmental pollutants directly affect the liver X receptor alpha activity: Kinetic and thermodynamic characterization of binding. J Steroid Biochem Mol Biol 2015; 152:1-7. [PMID: 25869557 DOI: 10.1016/j.jsbmb.2015.04.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 04/02/2015] [Accepted: 04/08/2015] [Indexed: 12/14/2022]
Abstract
Liver X receptor is a ligand-activated transcription factor, which is mainly involved in cholesterol homeostasis, bile acid and triglycerides metabolism, and, as recently discovered, in the glucose metabolism by direct regulation of liver glucokinase. Its modulation by exogenous factors, such as drugs, industrial by-products, and chemicals is documented. Owing to the abundance of these synthetic molecules in the environment, and to the established target role of this receptor, a number of representative compounds of phthalate, organophosphate and fibrate classes were tested as ligands/modulators of human liver X receptor, using an integrated approach, combining an in silico molecular docking technique with an optical SPR biosensor binding study. The compounds of interest were predicted and proved to target the oxysterols-binding site of human LXRα with measurable binding kinetic constants and with affinities ranging between 4.3 × 10(-7) and 4.3 × 10(-8)M. Additionally, non-cytotoxic concentration of these chemicals induced relevant changes in the LXRα gene expression levels and other target genes (SREBP-1c and LGK) in human liver hepatocellular carcinoma cell line (HepG2), as demonstrated by q-RT-PCR.
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Affiliation(s)
- Matteo Mozzicafreddo
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy.
| | | | - Laura Bonfili
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Valentina Cecarini
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | | | - Paolo Cocci
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Gilberto Mosconi
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Aida Capone
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Irene Ricci
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Anna Maria Eleuteri
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
| | - Mauro Angeletti
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032 Italy
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20
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Chatterjee S, Kumar GS. Targeting the heme proteins hemoglobin and myoglobin by janus green blue and study of the dye–protein association by spectroscopy and calorimetry. RSC Adv 2014. [DOI: 10.1039/c4ra06600f] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The binding of the phenazinium dye janus green blue (JGB) to two heme proteins, hemoglobin (Hb) and myoglobin (Mb), was studied by biophysical and microcalorimetry techniques.
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Affiliation(s)
- Sabyasachi Chatterjee
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032, India
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21
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Gokara M, Kimavath GB, Podile AR, Subramanyam R. Differential interactions and structural stability of chitosan oligomers with human serum albumin and α-1-glycoprotein. J Biomol Struct Dyn 2013; 33:196-210. [DOI: 10.1080/07391102.2013.868321] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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22
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Geng B, Liu X, Tian Y, Ye J, Li H, Wu J. Investigation on the interaction between endocrine disruptor triphenyltin with human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 120:512-516. [PMID: 24211812 DOI: 10.1016/j.saa.2013.10.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/01/2013] [Accepted: 10/05/2013] [Indexed: 06/02/2023]
Abstract
The interaction between triphenyltin (TPT) and human serum albumin (HSA) in physiological buffer (pH=7.4) was investigated by the fluorescence quenching technique. The results of fluorescence titration revealed that TPT could strongly quench the intrinsic fluorescence of HSA through a static quenching procedure. The apparent binding constants K and number of binding sites n of TPT with HSA were 2.51×10(3) and 0.96 at 298 K which were obtained by the fluorescence quenching method. The thermodynamic parameters enthalpy change (ΔH), entropy change (ΔS) were positive, which indicated that the interaction of TPT with HSA was driven mainly by hydrophobic forces. The process of binding was a spontaneous process in which Gibbs free energy change was negative. The distance r between donor (HSA) and acceptor (TPT) was calculated to be 3.13 nm based on Forster's non-radiative energy transfer theory. The results of synchronous fluorescence, three-dimensional fluorescence and circular dichroism (CD) spectra showed that the triphenyltin induced conformational changes of HSA.
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Affiliation(s)
- Bing Geng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
| | - Xue Liu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Yunlong Tian
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Jing Ye
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Hongna Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Jinbao Wu
- Shenyang University of Chemical Technology, Shenyang 110142, PR China
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23
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Yang X, Ye Z, Yuan Y, Zheng Z, Shi J, Ying Y, Huang P. Insights into the binding of paclitaxel to human serum albumin: multispectroscopic studies. LUMINESCENCE 2013; 28:427-34. [PMID: 23674486 DOI: 10.1002/bio.2522] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/22/2013] [Accepted: 03/15/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Xiuli Yang
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Zuowu Ye
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Yong Yuan
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Zaoqian Zheng
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Jiana Shi
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Yin Ying
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
| | - Ping Huang
- Tong De Hospital of Zhejiang Province; Zhejiang; Hangzhou; 310058; China
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