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Lemli B, Lomozová Z, Huber T, Lukács A, Poór M. Effects of Heme Site (FA1) Ligands Bilirubin, Biliverdin, Hemin, and Methyl Orange on the Albumin Binding of Site I Marker Warfarin: Complex Allosteric Interactions. Int J Mol Sci 2022; 23:ijms232214007. [PMID: 36430492 PMCID: PMC9694159 DOI: 10.3390/ijms232214007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/09/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
Human serum albumin (HSA) is the most abundant plasma protein in circulation. The three most important drug-binding sites on HSA are Sudlow's Site I (subdomain IIA), Sudlow's Site II (subdomain IIIA), and Heme site (subdomain IB). Heme site and Site I are allosterically coupled; therefore, their ligands may be able to allosterically modulate the binding affinity of each other. In this study, the effects of four Heme site ligands (bilirubin, biliverdin, hemin, and methyl orange) on the interaction of the Site I ligand warfarin with HSA were tested, employing fluorescence spectroscopic, ultrafiltration, and ultracentrifugation studies. Our major results/conclusions are the following. (1) Quenching studies indicated no relevant interaction, while the other fluorescent model used suggested that each Heme site ligand strongly decreases the albumin binding of warfarin. (2) Ultrafiltration and ultracentrifugation studies demonstrated the complex modulation of warfarin-HSA interaction by the different Heme site markers; for example, bilirubin strongly decreased while methyl orange considerably increased the bound fraction of warfarin. (3) Fluorescence spectroscopic studies showed misleading results in these diligand-albumin interactions. (4) Different Heme site ligands can increase or decrease the albumin binding of warfarin and the outcome can even be concentration dependent (e.g., biliverdin and hemin).
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Affiliation(s)
- Beáta Lemli
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Rókus u. 2, H-7624 Pécs, Hungary
- Green Chemistry Research Group, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Zuzana Lomozová
- The Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Tamás Huber
- Department of Biophysics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - András Lukács
- Department of Biophysics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Miklós Poór
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Rókus u. 2, H-7624 Pécs, Hungary
- Lab-on-a-Chip Research Group, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-501-500 (ext. 28316)
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Coura CPDM, Fragoso VMDS, Valdez ECN, Paulino ET, Silva D, Cortez CM. Study on the interaction of three classical drugs used in psychiatry in albumin through spectrofluorimetric modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 255:119638. [PMID: 33780894 DOI: 10.1016/j.saa.2021.119638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 12/16/2020] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
Comparative study of haloperidol (HPD), biperiden (BPD) and clonazepam (CNZ) interactions with human and bovine serum albumin was performed based on fluorescence quenching analysis. We used mathematical modeling comparing spectrofluorimetric data to obtain information on the possibility of competition among three drugs by sites binding. Results showed that the three drugs studied have high affinity for albumin and suggest the existence of two site classes in HSA for HPD and only one class for BPD and CNZ, in the range of concentrations tested for each drug. Among them, only HPD forms complex with HSA. Comparing normalized quenching plots suggested that the primary sites in HSA and BSA for HPD and CNZ are located at subdomain IB, whereas BPD would bind in the subdomain IIA. Considering the competition for binding sites in HSA, titrations of HPD-HSA complex by BPD and CNZ, as well as the titration of HSA solution containing CNZ titrated by BPD, show that although the three drugs do not compete with each other for binding sites, their interaction with HSA can cause conformational change in the protein, and to increase or decrease the accessibility to binding sites for other drug. This may mean alteration in the free plasma drug concentrations.
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Affiliation(s)
| | - Viviane Muniz da Silva Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | | | - Erica Tex Paulino
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | - Dilson Silva
- Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil; Department of Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
| | - Célia Martins Cortez
- Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil; Department of Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
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3
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A mathematical model to estimate binding sites for ligands in HSA and BSA based on spectrofluorimetry. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Leboffe L, di Masi A, Polticelli F, Trezza V, Ascenzi P. Structural Basis of Drug Recognition by Human Serum Albumin. Curr Med Chem 2020; 27:4907-4931. [DOI: 10.2174/0929867326666190320105316] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/12/2019] [Accepted: 03/06/2019] [Indexed: 12/18/2022]
Abstract
Background:
Human serum albumin (HSA), the most abundant protein in plasma,
is a monomeric multi-domain macromolecule with at least nine binding sites for endogenous
and exogenous ligands. HSA displays an extraordinary ligand binding capacity as a depot and
carrier for many compounds including most acidic drugs. Consequently, HSA has the potential
to influence the pharmacokinetics and pharmacodynamics of drugs.
Objective:
In this review, the structural determinants of drug binding to the multiple sites of
HSA are analyzed and discussed in detail. Moreover, insight into the allosteric and competitive
mechanisms underpinning drug recognition, delivery, and efficacy are analyzed and discussed.
Conclusion:
As several factors can modulate drug binding to HSA (e.g., concurrent administration
of drugs competing for the same binding site, ligand binding to allosteric-coupled
clefts, genetic inherited diseases, and post-translational modifications), ligand binding to HSA
is relevant not only under physiological conditions, but also in the pharmacological therapy
management.
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Affiliation(s)
- Loris Leboffe
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Alessandra di Masi
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Fabio Polticelli
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Viviana Trezza
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Paolo Ascenzi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University, Via della Vasca Navale 79, I- 00146 Roma, Italy
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Jaunet-Lahary T, Vercauteren DP, Fleury F, Laurent AD. Computational simulations determining disulfonic stilbene derivative bioavailability within human serum albumin. Phys Chem Chem Phys 2019; 20:18020-18030. [PMID: 29931001 DOI: 10.1039/c8cp00704g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Disulfonic stilbene (DS) derivatives are a member of the large family of compounds widely employed in medicine and biology as modulators for membrane transporters or inhibitors of a protein involved in DNA repair. They constitute interesting compounds that have not yet been investigated within the bioavailability framework. No crystallographic structures exist involving such compounds embedded in the most common drug carrier, human serum albumin (HSA). The present work studies, for the first time, the physico-chemical features driving the inclusion of three DS derivatives (amino, nitro and acetamido, named DADS, DNDS and DATDS, respectively) within the four common HSA binding sites using combined molecular docking and molecular dynamics simulations. A careful analysis of each ligand within each of the studied binding sites is carried out, highlighting specific interactions and key residues playing a role in stabilizing the ligand within each pocket. The comparison between DADS, DNDS and DATDS reveals that depending on the binding site, the conclusions are rather different. For instance, the IB binding site shows a specificity to DADS compounds while IIIA is the most favorable site for DNDS and DATDS.
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Affiliation(s)
- Titouan Jaunet-Lahary
- Laboratoire CEISAM - UMR CNRS 6230, Université de Nantes, 2 Rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
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Ascenzi P, Bocedi A, Gioia M, Fanali G, Fasano M, Coletta M. Warfarin inhibits allosterically the reductive nitrosylation of ferric human serum heme-albumin. J Inorg Biochem 2017; 177:63-75. [PMID: 28926756 DOI: 10.1016/j.jinorgbio.2017.08.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 08/30/2017] [Indexed: 12/31/2022]
Abstract
Human serum heme-albumin (HSA-heme-Fe) displays heme-based ligand binding and (pseudo-)enzymatic properties. Here, the effect of the prototypical drug warfarin on kinetics and thermodynamics of NO binding to ferric and ferrous HSA-heme-Fe (HSA-heme-Fe(III) and HSA-heme-Fe(II), respectively) and on the NO-mediated reductive nitrosylation of the heme-Fe atom is reported; data were obtained between pH5.5 and 9.5 at 20.0°C. Since warfarin is a common drug, its effect on the reactivity of HSA-heme-Fe represents a relevant issue in the pharmacological therapy management. The inhibition of NO binding to HSA-heme-Fe(III) and HSA-heme-Fe(II) as well as of the NO-mediated reductive nitrosylation of the heme-Fe(III) atom by warfarin has been ascribed to drug binding to the fatty acid binding site 2 (FA2), shifting allosterically the penta-to-six coordination equilibrium of the heme-Fe atom toward the low reactive species showing the six-coordinated metal center by His146 and Tyr161 residues. These data: (i) support the role of HSA-heme-Fe in trapping NO, (ii) highlight the modulation of the heme-Fe-based reactivity by drugs, and (iii) could be relevant for the modulation of HSA functions by drugs in vivo.
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Affiliation(s)
- Paolo Ascenzi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University, I-00146 Roma, Italy.
| | - Alessio Bocedi
- Department of Chemical Sciences and Technology, University of Roma "Tor Vergata", I-00133 Roma, Italy
| | - Magda Gioia
- Department of Clinical Sciences and Translational Medicine, University of Roma "Tor Vergata", I-00133 Roma, Italy; Interuniversity Consortium for the Research on the Chemistry of Metals in Biological Systems, I-70126 Bari, Italy
| | | | - Mauro Fasano
- Department of Science and High Technology, University of Insubria, I-21052 Busto Arsizio, VA, Italy; Neuroscience Research Center, University of Insubria, I-21052 Busto Arsizio, VA, Italy
| | - Massimo Coletta
- Department of Clinical Sciences and Translational Medicine, University of Roma "Tor Vergata", I-00133 Roma, Italy; Interuniversity Consortium for the Research on the Chemistry of Metals in Biological Systems, I-70126 Bari, Italy
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7
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Efficacy assessment of self-assembled PLGA-PEG-PLGA nanoparticles: Correlation of nano-bio interface interactions, biodistribution, internalization and gene expression studies. Int J Pharm 2017; 533:389-401. [PMID: 28552798 DOI: 10.1016/j.ijpharm.2017.05.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 04/21/2017] [Accepted: 05/22/2017] [Indexed: 11/22/2022]
Abstract
The aim of our study was to develop and compare the biological performance of two types of biodegradable SN-38 loaded nanoparticles (NPs) with various surface properties, composed of low and high Mw triblock PLGA-PEG-PLGA copolymers, applying rational quality and safety by design approach. Therefore, along with the optimization of crucial physico-chemical properties and in order to evaluate the therapeutical potential and biocompatibility of prepared polymeric nanoparticles, analysis of nano-bio interactions, cell internalization, gene expression and biodistribution studies were performed. The optimized formulations, one of low Mw and one composed of high Mw PLGA-PEG-PLGA copolymer, exhibited different characteristics in terms of surface properties, particle size, zeta potential, drug loading, protein adsorption and biodistribution, which may be attributed to the variations in nano-bio interface interactions due to different NP building blocks length and Mw. On the contrary to protein adsorption and biodistribution studies, both types of NPs exhibited similar results during cell internalization and gene expression studies performed in cell culture medium containing serum proteins. This pool of useful data for internalization and efficacy as well as the notable advance in the circulation time of low Mw NPs may be further employed for shaping the potential of the designed nanocarriers.
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8
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Ascenzi P, di Masi A, Leboffe L, Fanali G, Fasano M. The drug-dependent five- to six-coordination transition of the heme-Fe atom modulates allosterically human serum heme-albumin reactivity. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2016. [DOI: 10.1007/s12210-016-0562-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Li Y, Huang Y, Wang Z, Carniato F, Xie Y, Patterson JP, Thompson MP, Andolina CM, Ditri TB, Millstone JE, Figueroa JS, Rinehart JD, Scadeng M, Botta M, Gianneschi NC. Polycatechol Nanoparticle MRI Contrast Agents. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:668-77. [PMID: 26681255 PMCID: PMC5441847 DOI: 10.1002/smll.201502754] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/29/2015] [Indexed: 05/04/2023]
Abstract
Amphiphilic triblock copolymers containing Fe(III) -catecholate complexes formulated as spherical- or cylindrical-shaped micellar nanoparticles (SMN and CMN, respectively) are described as new T1-weighted agents with high relaxivity, low cytotoxicity, and long-term stability in biological fluids. Relaxivities of both SMN and CMN exceed those of established gadolinium chelates across a wide range of magnetic field strengths. Interestingly, shape-dependent behavior is observed in terms of the particles' interactions with HeLa cells, with CMN exhibiting enhanced uptake and contrast via magnetic resonance imaging (MRI) compared with SMN. These results suggest that control over soft nanoparticle shape will provide an avenue for optimization of particle-based contrast agents as biodiagnostics. The polycatechol nanoparticles are proposed as suitable for preclinical investigations into their viability as gadolinium-free, safe, and effective imaging agents for MRI contrast enhancement.
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Affiliation(s)
- Yiwen Li
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Yuran Huang
- Department of Materials Science and Engineering, University of California San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Zhao Wang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Alessandria, Italy
| | - Yijun Xie
- Department of Materials Science and Engineering, University of California San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Joseph P Patterson
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Matthew P Thompson
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Christopher M Andolina
- Department of Chemistry, University of Pittsburgh, 4200 Fifth Ave., Pittsburgh, PA, 15260, USA
| | - Treffly B Ditri
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Jill E Millstone
- Department of Chemistry, University of Pittsburgh, 4200 Fifth Ave., Pittsburgh, PA, 15260, USA
| | - Joshua S Figueroa
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Jeffrey D Rinehart
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Miriam Scadeng
- Department of Radiology, University of California San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Alessandria, Italy
| | - Nathan C Gianneschi
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
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da Silva Fragoso VM, de Morais Coura CP, Hoppe LY, Soares MAG, Silva D, Cortez CM. Binding of Sulpiride to Seric Albumins. Int J Mol Sci 2016; 17:ijms17010059. [PMID: 26742031 PMCID: PMC4730304 DOI: 10.3390/ijms17010059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 11/23/2015] [Accepted: 11/30/2015] [Indexed: 01/23/2023] Open
Abstract
The aim of this work was to study the interaction of sulpiride with human serum albumin (HSA) and bovine serum albumin (BSA) through the fluorescence quenching technique. As sulpiride molecules emit fluorescence, we have developed a simple mathematical model to discriminate the quencher fluorescence from the albumin fluorescence in the solution where they interact. Sulpiride is an antipsychotic used in the treatment of several psychiatric disorders. We selectively excited the fluorescence of tryptophan residues with 290 nm wavelength and observed the quenching by titrating HSA and BSA solutions with sulpiride. Stern-Volmer graphs were plotted and quenching constants were estimated. Results showed that sulpiride form complexes with both albumins. Estimated association constants for the interaction sulpiride–HSA were 2.20 (±0.08) × 104 M−1, at 37 °C, and 5.46 (±0.20) × 104 M−1, at 25 °C. Those for the interaction sulpiride-BSA are 0.44 (±0.01) × 104 M−1, at 37 °C and 2.17 (±0.04) × 104 M−1, at 25 °C. The quenching intensity of BSA, which contains two tryptophan residues in the peptide chain, was found to be higher than that of HSA, what suggests that the primary binding site for sulpiride in albumin should be located next to the sub domain IB of the protein structure.
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Affiliation(s)
- Viviane Muniz da Silva Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | - Carla Patrícia de Morais Coura
- Postgraduation in Medical Sciences, Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil.
| | - Luanda Yanaan Hoppe
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | - Marília Amável Gomes Soares
- Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
| | - Dilson Silva
- Postgraduation in Medical Sciences, Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil.
- Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
| | - Celia Martins Cortez
- Postgraduation in Medical Sciences, Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil.
- Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
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Ascenzi P, di Masi A, Fanali G, Fasano M. Heme-based catalytic properties of human serum albumin. Cell Death Discov 2015; 1:15025. [PMID: 27551458 PMCID: PMC4991842 DOI: 10.1038/cddiscovery.2015.25] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 07/09/2015] [Indexed: 12/11/2022] Open
Abstract
Human serum albumin (HSA): (i) controls the plasma oncotic pressure, (ii) modulates fluid distribution between the body compartments, (iii) represents the depot and carrier of endogenous and exogenous compounds, (iv) increases the apparent solubility and lifetime of hydrophobic compounds, (v) affects pharmacokinetics of many drugs, (vi) inactivates toxic compounds, (vii) induces chemical modifications of some ligands, (viii) displays antioxidant properties, and (ix) shows enzymatic properties. Under physiological and pathological conditions, HSA has a pivotal role in heme scavenging transferring the metal-macrocycle from high- and low-density lipoproteins to hemopexin, thus acquiring globin-like reactivity. Here, the heme-based catalytic properties of HSA are reviewed and the structural bases of drug-dependent allosteric regulation are highlighted.
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Affiliation(s)
- P Ascenzi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University , 00146 Roma, Italy
| | - A di Masi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University, 00146 Roma, Italy; Department of Sciences, Roma Tre University, 00146 Roma, Italy
| | - G Fanali
- Biomedical Research Division, Department of Theoretical and Applied Sciences, University of Insubria , 21052 Busto Arsizio, Italy
| | - M Fasano
- Biomedical Research Division, Department of Theoretical and Applied Sciences, University of Insubria, 21052 Busto Arsizio, Italy; Center of Neuroscience, University of Insubria, 21052 Busto Arsizio, Italy
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12
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Ascenzi P, Fanali G, Fasano M, Pallottini V, Trezza V. Clinical relevance of drug binding to plasma proteins. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.09.053] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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13
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Imatinib binding to human serum albumin modulates heme association and reactivity. Arch Biochem Biophys 2014; 560:100-12. [DOI: 10.1016/j.abb.2014.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 06/25/2014] [Accepted: 07/02/2014] [Indexed: 01/09/2023]
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14
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Meneghini C, Leboffe L, Bionducci M, Fanali G, Meli M, Colombo G, Fasano M, Ascenzi P, Mobilio S. The five-to-six-coordination transition of ferric human serum heme-albumin is allosterically-modulated by ibuprofen and warfarin: a combined XAS and MD study. PLoS One 2014; 9:e104231. [PMID: 25153171 PMCID: PMC4143227 DOI: 10.1371/journal.pone.0104231] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 07/08/2014] [Indexed: 12/20/2022] Open
Abstract
Human serum albumin (HSA) is involved physiologically in heme scavenging; in turn, heme-albumin (HSA-heme-Fe) displays globin-like properties. Here, the allosteric effect of ibuprofen and warfarin on the local atomic structure around the ferric heme-Fe (heme-Fe(III)) atom of HSA-heme-Fe (HSA-heme-Fe(III)) has been probed by Fe-K edge X-ray absorption spectroscopy (XAS). The quantitative analysis of the Fe-K edge extended X-ray absorption fine structure (EXAFS) signals and modeling of the near edge (XANES) spectral features demonstrated that warfarin and ibuprofen binding modify the local structure of the heme-Fe(III). Combined XAS data analysis and targeted molecular dynamics (MD) simulations provided atomic resolution insights of protein structural rearrangements required to accommodate the heme-Fe(III) upon ibuprofen and warfarin binding. In the absence of drugs, the heme-Fe(III) atom is penta-coordinated having distorted 4+1 configuration made by the nitrogen atoms of the porphyrin ring and the oxygen phenoxy atom of the Tyr161 residue. MD simulations show that ibuprofen and warfarin association to the secondary fatty acid (FA) binding site 2 (FA2) induces a reorientation of domain I of HSA-heme-Fe(III), this leads to the redirection of the His146 residue providing an additional bond to the heme-Fe(III) atom, providing the 5+1 configuration. The comparison of Fe-K edge XANES spectra calculated using MD structures with those obtained experimentally confirms the reliability of the proposed structural model. As a whole, combining XAS and MD simulations it has been possible to provide a reliable model of the heme-Fe(III) atom coordination state and to understand the complex allosteric transition occurring in HSA-heme-Fe(III) upon ibuprofen and warfarin binding.
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Affiliation(s)
| | - Loris Leboffe
- Department of Sciences, Roma Tre University, Roma, Italy
- National Institute of Biostructures and Biosystems, Roma, Italy
| | | | - Gabriella Fanali
- Biomedical Research Division, Department of Theoretical and Applied Sciences, and Center of Neuroscience, University of Insubria, Busto Arsizio (VA), Italy
| | - Massimiliano Meli
- Institute for Molecular Recognition Chemistry, National Research Council, Milano, Italy
| | - Giorgio Colombo
- Institute for Molecular Recognition Chemistry, National Research Council, Milano, Italy
| | - Mauro Fasano
- Biomedical Research Division, Department of Theoretical and Applied Sciences, and Center of Neuroscience, University of Insubria, Busto Arsizio (VA), Italy
| | - Paolo Ascenzi
- National Institute of Biostructures and Biosystems, Roma, Italy
- Interdepartmental Laboratory of Electron Microscopy, Roma Tre University, Roma, Italy
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Arroyo V, García-Martinez R, Salvatella X. Human serum albumin, systemic inflammation, and cirrhosis. J Hepatol 2014; 61:396-407. [PMID: 24751830 DOI: 10.1016/j.jhep.2014.04.012] [Citation(s) in RCA: 339] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/04/2014] [Accepted: 04/06/2014] [Indexed: 12/16/2022]
Abstract
Human serum albumin (HSA) is one of the most frequent treatments in patients with decompensated cirrhosis. Prevention of paracentesis-induced circulatory dysfunction, prevention of type-1 HRS associated with bacterial infections, and treatment of type-1 hepatorenal syndrome are the main indications. In these indications treatment with HSA is associated with improvement in survival. Albumin is a stable and very flexible molecule with a heart shape, 585 residues, and three domains of similar size, each one containing two sub-domains. Many of the physiological functions of HSA rely on its ability to bind an extremely wide range of endogenous and exogenous ligands, to increase their solubility in plasma, to transport them to specific tissues and organs, or to dispose of them when they are toxic. The chemical structure of albumin can be altered by some specific processes (oxidation, glycation) leading to rapid clearance and catabolism. An outstanding feature of HSA is its capacity to bind lipopolysaccharide and other bacterial products (lipoteichoic acid and peptidoglycan), reactive oxygen species, nitric oxide and other nitrogen reactive species, and prostaglandins. Binding to NO and prostaglandins are reversible, so they can be transferred to other molecules at different sites from their synthesis. Through these functions, HSA modulates the inflammatory reaction. Decompensated cirrhosis is a disease associated systemic inflammation, which plays an important role in the pathogenesis of organ or system dysfunction/failure. Although, the beneficial effects of HAS have been traditionally attributed to plasma volume expansion, they could also relate to its effects modulating systemic and organ inflammation.
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Affiliation(s)
- Vicente Arroyo
- Liver Unit, Hospital Clinic, Centre Esther Koplowitz, IDIBAPS, University of Barcelona, Barcelona, Spain; EASL-Cronic Liver Failure Consortium, Fundació Clinic, Barcelona, Spain.
| | | | - Xavier Salvatella
- ICREA and BSC-CRG-IRB Research Programme in Computational Biology, IRB Barcelona (IRB), Barcelona, Spain
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Fanali G, Fasano M, Ascenzi P, Zingg JM, Azzi A. α-Tocopherol binding to human serum albumin. Biofactors 2013; 39:294-303. [PMID: 23355326 DOI: 10.1002/biof.1070] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 11/02/2012] [Indexed: 11/12/2022]
Abstract
Given the ability of human serum albumin (HSA) to bind hydrophobic ligands, the binding mode of α-tocopherol, the most representative member of the vitamin E family, is reported. α-Tocopherol binds to HSA with Kd0 = (7.0 ± 3.0) × 10(-6) M (pH 7.2, 25.0°C). Competitive and allosteric modulation of α-tocopherol binding to full-length and truncated (Asp1-Glu382) HSA by endogenous and exogenous ligands suggests that it accommodates preferentially in the FA3-FA4 site. As HSA is taken up into cells, colocalizes with the α-tocopherol transfer protein, and contributes to ligand secretion via ABCA1, it might participate in the distribution of α-tocopherol between plasma, cells, and tissues.
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Affiliation(s)
- Gabriella Fanali
- Division of Biomedical Sciences, Department of Theoretical and Applied Sciences, Center of Neuroscience, University of Insubria, Busto Arsizio (VA), Italy.
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Ascenzi P, di Masi A, Leboffe L, Alberio T, Fanali G, Fasano M. Molecular phylogenetic analyses of albuminoids reveal the molecular evolution of allosteric properties. IUBMB Life 2013; 65:544-9. [DOI: 10.1002/iub.1164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 02/21/2013] [Indexed: 11/07/2022]
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18
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Bocedi A, De Sanctis G, Ciaccio C, Tundo GR, Di Masi A, Fanali G, Nicoletti FP, Fasano M, Smulevich G, Ascenzi P, Coletta M. Reciprocal allosteric modulation of carbon monoxide and warfarin binding to ferrous human serum heme-albumin. PLoS One 2013; 8:e58842. [PMID: 23555601 PMCID: PMC3605432 DOI: 10.1371/journal.pone.0058842] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 02/07/2013] [Indexed: 11/18/2022] Open
Abstract
Human serum albumin (HSA), the most abundant protein in human plasma, could be considered as a prototypic monomeric allosteric protein, since the ligand-dependent conformational adaptability of HSA spreads beyond the immediate proximity of the binding site(s). As a matter of fact, HSA is a major transport protein in the bloodstream and the regulation of the functional allosteric interrelationships between the different binding sites represents a fundamental information for the knowledge of its transport function. Here, kinetics and thermodynamics of the allosteric modulation: (i) of carbon monoxide (CO) binding to ferrous human serum heme-albumin (HSA-heme-Fe(II)) by warfarin (WF), and (ii) of WF binding to HSA-heme-Fe(II) by CO are reported. All data were obtained at pH 7.0 and 25°C. Kinetics of CO and WF binding to the FA1 and FA7 sites of HSA-heme-Fe(II), respectively, follows a multi-exponential behavior (with the same relative percentage for the two ligands). This can be accounted for by the existence of multiple conformations and/or heme-protein axial coordination forms of HSA-heme-Fe(II). The HSA-heme-Fe(II) populations have been characterized by resonance Raman spectroscopy, indicating the coexistence of different species characterized by four-, five- and six-coordination of the heme-Fe atom. As a whole, these results suggest that: (i) upon CO binding a conformational change of HSA-heme-Fe(II) takes place (likely reflecting the displacement of an endogenous ligand by CO), and (ii) CO and/or WF binding brings about a ligand-dependent variation of the HSA-heme-Fe(II) population distribution of the various coordinating species. The detailed thermodynamic and kinetic analysis here reported allows a quantitative description of the mutual allosteric effect of CO and WF binding to HSA-heme-Fe(II).
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Affiliation(s)
- Alessio Bocedi
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Roma, Italy
| | - Giampiero De Sanctis
- Department of Molecular, Cellular and Animal Biology, University of Camerino, Camerino (MC), Italy
| | - Chiara Ciaccio
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Roma, Italy
| | - Grazia R. Tundo
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Roma, Italy
- Interuniversity Consortium for the Research on the Chemistry of Metals in Biological Systems, Bari, Italy
| | - Alessandra Di Masi
- Department of Biology and Interdepartmental Laboratory for Electron Microscopy, University Roma Tre, Roma, Italy
| | - Gabriella Fanali
- Department of Structural and Functional Biology and Center of Neuroscience, University of Insubria, Busto Arsizio (VA), Italy
| | - Francesco P. Nicoletti
- Department of Chemistry “Ugo Schiff”, University of Firenze, Sesto Fiorentino (FI), Italy
| | - Mauro Fasano
- Department of Structural and Functional Biology and Center of Neuroscience, University of Insubria, Busto Arsizio (VA), Italy
| | - Giulietta Smulevich
- Department of Chemistry “Ugo Schiff”, University of Firenze, Sesto Fiorentino (FI), Italy
| | - Paolo Ascenzi
- Department of Biology and Interdepartmental Laboratory for Electron Microscopy, University Roma Tre, Roma, Italy
| | - Massimo Coletta
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Roma, Italy
- Interuniversity Consortium for the Research on the Chemistry of Metals in Biological Systems, Bari, Italy
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Luisi I, Pavan S, Fontanive G, Tossi A, Benedetti F, Savoini A, Maurizio E, Sgarra R, Sblattero D, Berti F. An albumin-derived peptide scaffold capable of binding and catalysis. PLoS One 2013; 8:e56469. [PMID: 23451052 PMCID: PMC3579865 DOI: 10.1371/journal.pone.0056469] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Accepted: 01/09/2013] [Indexed: 11/18/2022] Open
Abstract
We have identified a 101-amino-acid polypeptide derived from the sequence of the IIA binding site of human albumin. The polypeptide contains residues that make contact with IIA ligands in the parent protein, and eight cysteine residues to form disulfide bridges, that stabilize the polypeptide structure. Seventy-four amino acids are located in six α-helical regions, while the remaining thirty-seven amino acids form six connecting coil/loop regions. A soluble GST fusion protein was expressed in E. coli in yields as high as 4 mg/l. This protein retains the IIA fragment's capacity to bind typical ligands such as warfarin and efavirenz and other albumin's functional properties such as aldolase activity and the ability to direct the stereochemical outcome of a diketone reduction. This newly cloned polypeptide thus represents a valuable starting point for the construction of libraries of binders and catalysts with improved proficiency.
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Affiliation(s)
- Immacolata Luisi
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
- Dipartimento di Scienze della Vita, Università di Trieste, Trieste, Italy
| | - Silvia Pavan
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
| | - Giampaolo Fontanive
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
| | - Alessandro Tossi
- Dipartimento di Scienze della Vita, Università di Trieste, Trieste, Italy
| | - Fabio Benedetti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
| | | | - Elisa Maurizio
- Dipartimento di Scienze della Vita, Università di Trieste, Trieste, Italy
| | - Riccardo Sgarra
- Dipartimento di Scienze della Vita, Università di Trieste, Trieste, Italy
| | - Daniele Sblattero
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale “Amedeo Avogadro”, Novara, Italy
| | - Federico Berti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste, Italy
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Fanali G, Cao Y, Ascenzi P, Fasano M. Mn(II) binding to human serum albumin: A 1H-NMR relaxometric study. J Inorg Biochem 2012; 117:198-203. [DOI: 10.1016/j.jinorgbio.2012.08.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 08/21/2012] [Accepted: 08/24/2012] [Indexed: 12/20/2022]
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21
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Song Z, Zhao H, Olubajo O, Hall LB, Orr CN, Askew CB. Characterizing the binding of nucleotide ATP on serum albumin by 31P NMR diffusion. CAN J CHEM 2012. [DOI: 10.1139/v2012-011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The pulsed-field-gradient (PFG) 31P NMR diffusion spectra were measured under varied sample conditions to characterize the low-affinity binding of adenosine 5′-triphosphate (ATP) on human serum albumin (HSA) or bovine serum albumin (BSA). The NMR diffusion constants of ATP, ATP–HSA, or ATP–BSA were illustrated as function of ATP concentrations. The binding curves of ATP–HSA and ATP–BSA were identical but strikingly different from the ATP curve. Using a “Scatchard plot”, the apparent binding constant (K) and number of ATP binding sites (n) on serum albumin were evaluated as K = 75.25 (mol/L)–1 and n = 10, respectively. At a pH < 5.0 and a pH > 9.0 or a temperature > 45 °C, the diffusion data of ATP–HSA were found to increase remarkably, suggesting that the dissociation of ATP from HSA was largely enhanced, probably because of pH- or heat-induced protein structural change, degradation, or aggregation. In addition, our data indicated that ADP was strongly competitive with ATP for the low-affinity binding to HSA, but heptanone and Cl– were essentially noncompetitive. These results are important for further elucidating the interaction of ATP with serum albumin and its possible effect on related bioprocesses. The method can be well applied to study the binding of other nucleotides/nucleosides on proteins.
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Affiliation(s)
- Zhiyan Song
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
| | - Hua Zhao
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
| | - Olarongbe Olubajo
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
| | - Lewis B. Hall
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
| | - Chauncey N. Orr
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
| | - Courtney B. Askew
- Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA
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Fanali G, Ascenzi P, Bernardi G, Fasano M. Sequence analysis of serum albumins reveals the molecular evolution of ligand recognition properties. J Biomol Struct Dyn 2012; 29:691-701. [DOI: 10.1080/07391102.2011.672632] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fragoso VM, Silva D, Cruz FADO, Cortez CM. Risperidone interacts with serum albumin forming complex. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 33:262-266. [PMID: 22245842 DOI: 10.1016/j.etap.2011.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Revised: 11/21/2011] [Accepted: 11/23/2011] [Indexed: 05/31/2023]
Abstract
The aim of the work is to study the mechanisms of the interaction of risperidone with human and bovine serum albumins using the fluorescence quenching technique. Risperidone is an atypical antipsychotic drug used to treat many psychiatric disorders. We selectively excited the fluorescence of tryptophan residues with a 290 nm wavelength light, and observed quenching by titrating human and bovine serum albumin solutions with risperidone. Emission spectra were recorded in the range from 300 to 450 nm for each quencher addition. Stern-Volmer graphs were plotted and quenching constants were estimated. Results showed that the drug quenches the fluorescence of the human serum albumin by the formation of a complex risperidone-albumin. Association constants calculated from Stern-Volmer equation for low concentrations (lower than 1:10 ratio risperidone/albumin) were of 2.56 × 10(5)M(-1), at 25 °C, and 1.43 × 10(5)M(-1), at 37 °C. As the quenching intensity of bovine serum albumin, which contains two tryptophan residues, was found to be higher than that of human serum albumin, which contains only one tryptophan residue. Hence, we suggest that the primary binding site for risperidone in albumin should be located in sub domain IB.
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Affiliation(s)
- Viviane Muniz Fragoso
- Program Graduate in Clinical and Experimental Physiopathology, Rio de Janeiro State University, Brazil
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Human serum albumin: from bench to bedside. Mol Aspects Med 2011; 33:209-90. [PMID: 22230555 DOI: 10.1016/j.mam.2011.12.002] [Citation(s) in RCA: 1173] [Impact Index Per Article: 90.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Accepted: 12/21/2011] [Indexed: 02/07/2023]
Abstract
Human serum albumin (HSA), the most abundant protein in plasma, is a monomeric multi-domain macromolecule, representing the main determinant of plasma oncotic pressure and the main modulator of fluid distribution between body compartments. HSA displays an extraordinary ligand binding capacity, providing a depot and carrier for many endogenous and exogenous compounds. Indeed, HSA represents the main carrier for fatty acids, affects pharmacokinetics of many drugs, provides the metabolic modification of some ligands, renders potential toxins harmless, accounts for most of the anti-oxidant capacity of human plasma, and displays (pseudo-)enzymatic properties. HSA is a valuable biomarker of many diseases, including cancer, rheumatoid arthritis, ischemia, post-menopausal obesity, severe acute graft-versus-host disease, and diseases that need monitoring of the glycemic control. Moreover, HSA is widely used clinically to treat several diseases, including hypovolemia, shock, burns, surgical blood loss, trauma, hemorrhage, cardiopulmonary bypass, acute respiratory distress syndrome, hemodialysis, acute liver failure, chronic liver disease, nutrition support, resuscitation, and hypoalbuminemia. Recently, biotechnological applications of HSA, including implantable biomaterials, surgical adhesives and sealants, biochromatography, ligand trapping, and fusion proteins, have been reported. Here, genetic, biochemical, biomedical, and biotechnological aspects of HSA are reviewed.
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Evidence for pH-dependent multiple conformers in iron(II) heme–human serum albumin: spectroscopic and kinetic investigation of carbon monoxide binding. J Biol Inorg Chem 2011; 17:133-47. [DOI: 10.1007/s00775-011-0837-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Accepted: 08/07/2011] [Indexed: 12/22/2022]
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Ascenzi P, Cao Y, Tundo GR, Coletta M, Fanali G, Fasano M. Ibuprofen and warfarin modulate allosterically ferrous human serum heme–albumin nitrosylation. Biochem Biophys Res Commun 2011; 411:185-9. [DOI: 10.1016/j.bbrc.2011.06.130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Accepted: 06/20/2011] [Indexed: 01/06/2023]
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Isoniazid and rifampicin inhibit allosterically heme binding to albumin and peroxynitrite isomerization by heme–albumin. J Biol Inorg Chem 2010; 16:97-108. [DOI: 10.1007/s00775-010-0706-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 08/27/2010] [Indexed: 11/25/2022]
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28
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Ascenzi P, Fasano M. Allostery in a monomeric protein: The case of human serum albumin. Biophys Chem 2010; 148:16-22. [DOI: 10.1016/j.bpc.2010.03.001] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 02/22/2010] [Accepted: 03/01/2010] [Indexed: 10/19/2022]
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Ascenzi P, di Masi A, Coletta M, Ciaccio C, Fanali G, Nicoletti FP, Smulevich G, Fasano M. Ibuprofen impairs allosterically peroxynitrite isomerization by ferric human serum heme-albumin. J Biol Chem 2009; 284:31006-17. [PMID: 19734142 DOI: 10.1074/jbc.m109.010736] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Human serum albumin (HSA) participates in heme scavenging; in turn, heme endows HSA with myoglobin-like reactivity and spectroscopic properties. Here, the allosteric effect of ibuprofen on peroxynitrite isomerization to NO(3)(-) catalyzed by ferric human serum heme-albumin (HSA-heme-Fe(III)) is reported. Data were obtained at 22.0 degrees C. HSA-heme-Fe(III) catalyzes peroxynitrite isomerization in the absence and presence of CO(2); the values of the second order catalytic rate constant (k(on)) are 4.1 x 10(5) and 4.5 x 10(5) m(-1) s(-1), respectively. Moreover, HSA-heme-Fe(III) prevents peroxynitrite-mediated nitration of free added l-tyrosine. The pH dependence of k(on) (pK(a) = 6.9) suggests that peroxynitrous acid reacts preferentially with the heme-Fe(III) atom, in the absence and presence of CO(2). The HSA-heme-Fe(III)-catalyzed isomerization of peroxynitrite has been ascribed to the reactive pentacoordinated heme-Fe(III) atom. In the absence and presence of CO(2), ibuprofen impairs dose-dependently peroxynitrite isomerization by HSA-heme-Fe(III) and facilitates the nitration of free added l-tyrosine; the value of the dissociation equilibrium constant for ibuprofen binding to HSA-heme-Fe(III) (L) ranges between 7.7 x 10(-4) and 9.7 x 10(-4) m. Under conditions where [ibuprofen] is >>L, the kinetics of HSA-heme-Fe(III)-catalyzed isomerization of peroxynitrite is superimposable to that obtained in the absence of HSA-heme-Fe(III) or in the presence of non-catalytic HSA-heme-Fe(III)-cyanide complex and HSA. Ibuprofen binding impairs allosterically peroxynitrite isomerization by HSA-heme-Fe(III), inducing the hexacoordination of the heme-Fe(III) atom. These results represent the first evidence for peroxynitrite isomerization by HSA-heme-Fe(III), highlighting the allosteric modulation of HSA-heme-Fe(III) reactivity by heterotropic interaction(s), and outlining the role of drugs in modulating HSA functions. The present results could be relevant for the drug-dependent protective role of HSA-heme-Fe(III) in vivo.
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Affiliation(s)
- Paolo Ascenzi
- Department of Biology and Interdepartmental Laboratory for Electron Microscopy, University Roma Tre, I-00146 Roma, Italy.
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Baroni S, Pariani G, Fanali G, Longo D, Ascenzi P, Aime S, Fasano M. Thermodynamic analysis of hydration in human serum heme–albumin. Biochem Biophys Res Commun 2009; 385:385-9. [DOI: 10.1016/j.bbrc.2009.05.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Accepted: 05/15/2009] [Indexed: 10/20/2022]
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Ibuprofen modulates allosterically NO dissociation from ferrous nitrosylated human serum heme-albumin by binding to three sites. Biochem Biophys Res Commun 2009; 387:83-6. [PMID: 19559669 DOI: 10.1016/j.bbrc.2009.06.117] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Accepted: 06/20/2009] [Indexed: 11/21/2022]
Abstract
Human serum albumin (HSA) is a monomeric allosteric protein. Here, the effect of ibuprofen on denitrosylation kinetics (k(off)) and spectroscopic properties of HSA-heme-Fe(II)-NO is reported. The k(off) value increases from (1.4+/-0.2)x10(-4)s(-1), in the absence of the drug, to (9.5+/-1.2)x10(-3)s(-1), in the presence of 1.0x10(-2)M ibuprofen, at pH 7.0 and 10.0 degrees C. From the dependence of k(off) on the drug concentration, values of the dissociation equilibrium constants for ibuprofen binding to HSA-heme-Fe(II)-NO (K(1)=(3.1+/-0.4)x10(-7)M, K(2)=(1.7+/-0.2)x10(-4)M, and K(3)=(2.2+/-0.2)x10(-3)M) were determined. The K(3) value corresponds to the value of the dissociation equilibrium constant for ibuprofen binding to HSA-heme-Fe(II)-NO determined by monitoring drug-dependent absorbance spectroscopic changes (H=(2.6+/-0.3)x10(-3)M). Present data indicate that ibuprofen binds to the FA3-FA4 cleft (Sudlow's site II), to the FA6 site, and possibly to the FA2 pocket, inducing the hexa-coordination of HSA-heme-Fe(II)-NO and triggering the heme-ligand dissociation kinetics.
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