151
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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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152
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Del Giudice A, Leggio C, Balasco N, Galantini L, Pavel NV. Ibuprofen and Propofol Cobinding Effect on Human Serum Albumin Unfolding in Urea. J Phys Chem B 2014; 118:10043-51. [DOI: 10.1021/jp504280n] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alessandra Del Giudice
- Dipartimento
di Chimica, Sapienza Università di Roma, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Claudia Leggio
- Dipartimento
di Chimica, Sapienza Università di Roma, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Nicole Balasco
- Dipartimento
di Chimica, Sapienza Università di Roma, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Luciano Galantini
- Dipartimento
di Chimica, Sapienza Università di Roma, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Nicolae V. Pavel
- Dipartimento
di Chimica, Sapienza Università di Roma, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy
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153
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Abstract
With recent advances in data analysis algorithms, X-ray detectors and synchrotron sources, small-angle X-ray scattering (SAXS) has become much more accessible to the structural biology community. Although limited to ∼10 Å resolution, SAXS can provide a wealth of structural information on biomolecules in solution and is compatible with a wide range of experimental conditions. SAXS is thus an attractive alternative when crystallography is not possible. Moreover, advanced use of SAXS can provide unique insight into biomolecular behavior that can only be observed in solution, such as large conformational changes and transient protein-protein interactions. Unlike crystal diffraction data, however, solution scattering data are subtle in appearance, highly sensitive to sample quality and experimental errors and easily misinterpreted. In addition, synchrotron beamlines that are dedicated to SAXS are often unfamiliar to the nonspecialist. Here we present a series of procedures that can be used for SAXS data collection and basic cross-checks designed to detect and avoid aggregation, concentration effects, radiation damage, buffer mismatch and other common problems. Human serum albumin (HSA) serves as a convenient and easily replicated example of just how subtle these problems can sometimes be, but also of how proper technique can yield pristine data even in problematic cases. Because typical data collection times at a synchrotron are only one to several days, we recommend that the sample purity, homogeneity and solubility be extensively optimized before the experiment.
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Affiliation(s)
- Soren Skou
- Niels Bohr Institute, Copenhagen University, Copenhagen, Denmark
| | - Richard E Gillilan
- Macromolecular Diffraction Facility, Cornell High Energy Synchrotron Source (MacCHESS), Cornell University, Ithaca, NY, USA
| | - Nozomi Ando
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA, Tel: (617) 571-0411, Fax: (617) 258-7847
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154
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Kitamura K, Takegami S, Tanaka R, Omran AA, Kitade T. Effect of long-chain Fatty acids on the binding of triflupromazine to human serum albumin: a spectrophotometric study. Sci Pharm 2014; 82:233-45. [PMID: 24959397 PMCID: PMC4065120 DOI: 10.3797/scipharm.1310-23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 12/28/2013] [Indexed: 11/28/2022] Open
Abstract
Human serum albumin (HSA) in the blood binds long-chain fatty acids (LCFAs), and the number of bound LCFAs varies from 1 to 7 depending on the physical condition of the body. In this study, the influence of LCFA-HSA binding on drug-HSA binding was studied using triflupromazine (TFZ), a psychotropic phenothiazine drug, in a buffer (0.1 M NaCl, pH 7.40, 37°C) by a second-derivative spectrophotometric method which can suppress the residual background signal effects of HSA observed in the absorption spectra. The examined LCFAs were caprylic acid (CPA), lauric acid (LRA), oleic acid (OLA), and linoleic acid (LNA), respectively. Using the derivative intensity change of TFZ induced by the addition of HSA containing LCFA, the binding mode of TFZ was predicted to be a partition-like nonspecific binding. The binding constant (K M−1) showed an increase according to the LCFA content in HSA for LRA, OLA, and LNA up to an LCFA/HSA molar ratio of 3–4. However, at higher ratios the K value decreased, i.e. for OLA and LNA, at an LCFA/HSA ratio of 6–7, the K value decreased to 40% of the value for HSA alone. In contrast, CPA, having the shortest chain length (8 carbons) among the studied LCFAs, induced a 20% decrease in the K value regardless of its content in HSA. Since the pharmacological activity of a drug is closely related to the unbound drug concentration in the blood, the results of the present study are pharmaco-kinetically, pharmacologically, and clinically very important.
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Affiliation(s)
- Keisuke Kitamura
- Kyoto Pharmaceutical University, 5 Nakauchicho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
| | - Shigehiko Takegami
- Kyoto Pharmaceutical University, 5 Nakauchicho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
| | - Rumi Tanaka
- Kyoto Pharmaceutical University, 5 Nakauchicho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
| | - Ahmed Ahmed Omran
- Chemistry Department, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt. ; Chemistry Department, Faculty of Science, King Khalid University, Abha 9004, Saudi Arabia
| | - Tatsuya Kitade
- Kyoto Pharmaceutical University, 5 Nakauchicho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
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155
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Li R, Zheng K, Hu P, Chen Z, Zhou S, Chen J, Yuan C, Chen S, Zheng W, Ma E, Zhang F, Xue J, Chen X, Huang M. A novel tumor targeting drug carrier for optical imaging and therapy. Theranostics 2014; 4:642-59. [PMID: 24723985 PMCID: PMC3982134 DOI: 10.7150/thno.8527] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 03/05/2014] [Indexed: 12/20/2022] Open
Abstract
Human serum albumin (HSA), a naturally abundant protein in blood plasma and tissue fluids, has an extraordinary ligand-binding capacity and is advocated as a drug carrier to facilitate drug delivery. To render it tumor targeting specificity, we generated a recombinant HSA fused with the amino-terminal fragment (ATF) of urokinase, allowing the fusion protein to bind to urokinase receptor (uPAR), which is shown to have a high expression level in many tumors, but not in normal tissues. To test the efficacy of this bifunctional protein (ATF-HSA), a hydrophobic photosensitizer (mono-substituted β-carboxy phthalocyanine zinc, CPZ) was chosen as a cytotoxic agent. A dilution-incubation-purification (DIP) strategy was developed to load the ATF-HSA with this CPZ, forming a 1:1 molecular complex (ATF-HSA:CPZ). We demonstrated that CPZ was indeed embedded inside ATF-HSA at the fatty acid binding site 1 (FA1) of HSA, giving a hydrodynamic radius of 7.5 nm, close to HSA's (6.5 nm). ATF-HSA:CPZ showed high stability and remarkable optical and photophysical properties in aqueous solution. In addition, the molecular complex ATF-HSA:CPZ can bind to recombinant uPAR in vitro and uPAR on tumor cell surfaces, and was efficient in photodynamic killing of tumor cells. The tumor-killing potency of this molecular complex was further demonstrated in a tumor-bearing mouse model at a dose of 0.080 μmol / kg, or 0.050 mg CPZ / kg of mouse body weight. Using fluorescent molecular tomography (FMT), ATF-HSA:CPZ was shown to accumulate specifically in tumors, and importantly, such tumor retention was higher than that of HSA:CPZ. Together, these results indicate that ATF-HSA:CPZ is not only an efficient tumor-specific cytotoxic agent, but also an useful tumor-specific imaging probe. This bifunctional protein ATF-HSA can also be used as a drug carrier for other types of cytotoxic or imaging agents to render them specificity for uPAR-expressing tumors.
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156
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Interactive association of drugs binding to human serum albumin. Int J Mol Sci 2014; 15:3580-95. [PMID: 24583848 PMCID: PMC3975355 DOI: 10.3390/ijms15033580] [Citation(s) in RCA: 234] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 02/17/2014] [Accepted: 02/18/2014] [Indexed: 02/06/2023] Open
Abstract
Human serum albumin (HSA) is an abundant plasma protein, which attracts great interest in the pharmaceutical industry since it can bind a remarkable variety of drugs impacting their delivery and efficacy and ultimately altering the drug’s pharmacokinetic and pharmacodynamic properties. Additionally, HSA is widely used in clinical settings as a drug delivery system due to its potential for improving targeting while decreasing the side effects of drugs. It is thus of great importance from the viewpoint of pharmaceutical sciences to clarify the structure, function, and properties of HSA–drug complexes. This review will succinctly outline the properties of binding site of drugs in IIA subdomain within the structure of HSA. We will also give an overview on the binding characterization of interactive association of drugs to human serum albumin that may potentially lead to significant clinical applications.
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157
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Wang L, Zhang G, Wang Y. Binding properties of food colorant allura red with human serum albumin in vitro. Mol Biol Rep 2014; 41:3381-91. [PMID: 24500342 DOI: 10.1007/s11033-014-3200-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 01/25/2014] [Indexed: 12/11/2022]
Abstract
Allura red (AR) is a widely used colorant in food industry, but may have a potential security risk. In this study, the properties of interaction between AR and human serum albumin (HSA) in vitro were determined by fluorescence, UV-Vis absorption and circular dichroism (CD) spectroscopy combining with multivariate curve resolution-alternating least squares (MCR-ALS) chemometrics and molecular modeling approaches. An expanded UV-Vis data matrix was resolved by MCR-ALS method, and the concentration profiles and pure spectra for the three reaction components (AR, HSA, and AR-HSA complex) of the system were then successfully obtained to evaluate the progress interaction of AR with HSA. The calculated thermodynamic parameters indicated that hydrogen binding and hydrophobic interactions played major roles in the binding process, and the interaction induced a decrease in the protein surface hydrophobicity. The competitive experiments revealed that AR mainly located in Sudlow's site I of HSA, and this result was further supported by molecular modeling studies. Analysis of CD spectra found that the addition of AR induced the conformational changes of HSA. This study have provided new insight into the mechanism of interaction between AR and HSA.
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Affiliation(s)
- Langhong Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, China
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158
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Jupin M, Michiels PJ, Girard FC, Spraul M, Wijmenga SS. NMR metabolomics profiling of blood plasma mimics shows that medium- and long-chain fatty acids differently release metabolites from human serum albumin. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2014; 239:34-43. [PMID: 24374750 DOI: 10.1016/j.jmr.2013.11.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 11/26/2013] [Accepted: 11/28/2013] [Indexed: 06/03/2023]
Abstract
Metabolite profiling by NMR of body fluids is increasingly used to successfully differentiate patients from healthy individuals. Metabolites and their concentrations are direct reporters of body biochemistry. However, in blood plasma the NMR-detected free-metabolite concentrations are also strongly affected by interactions with the abundant plasma proteins, which have as of yet not been considered much in metabolic profiling. We previously reported that many of the common NMR-detected metabolites in blood plasma bind to human serum albumin (HSA) and many are released by fatty acids present in fatted HSA. HSA is the most abundant plasma protein and main transporter of endogenous and exogenous metabolites. Here, we show by NMR how the two most common fatty acids (FAs) in blood plasma - the long-chain FA, stearate (C18:0) and medium-chain FA, myristate (C14:0) - affect metabolite-HSA interaction. Of the set of 18 common NMR-detected metabolites, many are released by stearate and/or myristate, lactate appearing the most strongly affected. Myristate, but not stearate, reduces HSA-binding of phenylalanine and pyruvate. Citrate signals were NMR invisible in the presence of HSA. Only at high myristate-HSA mole ratios 11:1, is citrate sufficiently released to be detected. Finally, we find that limited dilution of blood-plasma mimics releases HSA-bound metabolites, a finding confirmed in real blood plasma samples. Based on these findings, we provide recommendations for NMR experiments for quantitative metabolite profiling.
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Affiliation(s)
- M Jupin
- Biophysical Chemistry, Institute for Materials and Molecules, Radboud University, Heyendaalseweg 135, 6524AJ Nijmegen, The Netherlands
| | - P J Michiels
- Spinnovation Analytical, Toernooiveld 1, Mercator III, 6525 ED Nijmegen, The Netherlands
| | - F C Girard
- Spinnovation Analytical, Toernooiveld 1, Mercator III, 6525 ED Nijmegen, The Netherlands
| | - M Spraul
- Bruker-Biospin GmbH, Rheinstetten, Germany
| | - S S Wijmenga
- Biophysical Chemistry, Institute for Materials and Molecules, Radboud University, Heyendaalseweg 135, 6524AJ Nijmegen, The Netherlands.
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159
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Li M, McAuley E, Zhang Y, Kong L, Yang F, Zhou Z, Wu X, Liang H. Comparison of binding characterization of two antiviral drugs to human serum albumin. Chem Biol Drug Des 2014; 83:576-82. [PMID: 24325603 DOI: 10.1111/cbdd.12270] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/14/2013] [Accepted: 12/05/2013] [Indexed: 12/18/2022]
Abstract
Ribavirin and lamivudine are representatives of antiviral drugs that are widely used to treat viral infections, especially chronic liver disease. To compare binding mechanism and behavior of antiviral drugs with human serum albumin (HSA), we performed fluorescence spectroscopy and X-ray crystallography to investigate the interactions of ribavirin and lamivudine with HSA. Fluorescence spectroscopy showed ribavirin and lamivudine inhibit binding affinity each other. Our results further demonstrated that ribavirin and lamivdudine interaction with HSA could be affected by the presence of other compounds, including the non-steroidal anti-inflammatory drugs, indometacin. X-ray structures revealed that ribavirin and lamivudine bind in IIA subdomain of HSA mainly by forming hydrogen bond and hydrophobic interactions forces. The carboxamido of ribavirin forms hydrogen bonds with Arg222; Hydroxyl group (6) of ribavirin forms hydrogen bond with Arg257. Hydroxyl group (15) of lamivudine forms hydrogen bond with Arg222; amino group (4) of lamivudine forms hydrogen bond with carbonyl of Arg257. Our results reveal the key biochemical and structural characteristics of the HSA interaction with ribavirin and lamivudine, providing guidance for future development of ribavirin- and lamivudine-based compounds and a drug-HSA delivery system.
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Affiliation(s)
- Mei Li
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, Guangxi Normal University, Guilin, 541004, China
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160
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Sivertsen A, Isaksson J, Leiros HKS, Svenson J, Svendsen JS, Brandsdal BO. Synthetic cationic antimicrobial peptides bind with their hydrophobic parts to drug site II of human serum albumin. BMC STRUCTURAL BIOLOGY 2014; 14:4. [PMID: 24456893 PMCID: PMC3907362 DOI: 10.1186/1472-6807-14-4] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 01/17/2014] [Indexed: 11/17/2022]
Abstract
Background Many biologically active compounds bind to plasma transport proteins, and this binding can be either advantageous or disadvantageous from a drug design perspective. Human serum albumin (HSA) is one of the most important transport proteins in the cardiovascular system due to its great binding capacity and high physiological concentration. HSA has a preference for accommodating neutral lipophilic and acidic drug-like ligands, but is also surprisingly able to bind positively charged peptides. Understanding of how short cationic antimicrobial peptides interact with human serum albumin is of importance for developing such compounds into the clinics. Results The binding of a selection of short synthetic cationic antimicrobial peptides (CAPs) to human albumin with binding affinities in the μM range is described. Competitive isothermal titration calorimetry (ITC) and NMR WaterLOGSY experiments mapped the binding site of the CAPs to the well-known drug site II within subdomain IIIA of HSA. Thermodynamic and structural analysis revealed that the binding is exclusively driven by interactions with the hydrophobic moieties of the peptides, and is independent of the cationic residues that are vital for antimicrobial activity. Both of the hydrophobic moieties comprising the peptides were detected to interact with drug site II by NMR saturation transfer difference (STD) group epitope mapping (GEM) and INPHARMA experiments. Molecular models of the complexes between the peptides and albumin were constructed using docking experiments, and support the binding hypothesis and confirm the overall binding affinities of the CAPs. Conclusions The biophysical and structural characterizations of albumin-peptide complexes reported here provide detailed insight into how albumin can bind short cationic peptides. The hydrophobic elements of the peptides studied here are responsible for the main interaction with HSA. We suggest that albumin binding should be taken into careful consideration in antimicrobial peptide studies, as the systemic distribution can be significantly affected by HSA interactions.
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Affiliation(s)
| | | | | | | | | | - Bjørn Olav Brandsdal
- The Norwegian Structural Biology Centre, Department of Chemistry, Faculty of Science and Technology, University of Tromsø, NO-9037 Tromsø, Norway.
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161
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Ang JC, Henderson MJ, Campbell RA, Lin JM, Yaron PN, Nelson A, Faunce T, White JW. Human serum albumin binding to silica nanoparticles – effect of protein fatty acid ligand. Phys Chem Chem Phys 2014; 16:10157-68. [DOI: 10.1039/c4cp00293h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Fat containing and defatted human serum albumin adsorption to silica nanoparticles have different structures and time dependence to form.
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Affiliation(s)
- Joo Chuan Ang
- Research School of Chemistry
- Australian National University
- Canberra, Australia
| | - Mark J. Henderson
- Research School of Chemistry
- Australian National University
- Canberra, Australia
| | | | - Jhih-Min Lin
- Research School of Chemistry
- Australian National University
- Canberra, Australia
| | - Peter N. Yaron
- Research School of Chemistry
- Australian National University
- Canberra, Australia
| | - Andrew Nelson
- Bragg Institute
- Australian Nuclear Science and Technology Organization
- Menai, Australia
| | - Thomas Faunce
- College of Law
- Australian National University
- ACT 0200, Australia
| | - John W. White
- Research School of Chemistry
- Australian National University
- Canberra, Australia
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162
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Leach AG. Predicting the activity and toxicity of new psychoactive substances: a pharmaceutical industry perspective. Drug Test Anal 2013; 6:739-45. [DOI: 10.1002/dta.1593] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 11/12/2013] [Accepted: 11/15/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Andrew G. Leach
- Liverpool John Moores University; James Parsons Building, Byrom Street Liverpool L3 3AF UK
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163
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Zhang F, Zhang J, Tong C, Chen Y, Zhuang S, Liu W. Molecular interactions of benzophenone UV filters with human serum albumin revealed by spectroscopic techniques and molecular modeling. JOURNAL OF HAZARDOUS MATERIALS 2013; 263 Pt 2:618-26. [PMID: 24231334 DOI: 10.1016/j.jhazmat.2013.10.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 09/18/2013] [Accepted: 10/10/2013] [Indexed: 05/08/2023]
Abstract
Benzophenone (BP)-type UV filters have been widely used in many personal care products to protect human from UV exposure. Their dermal applications can cause direct human health risk following accumulation in bloodstream. Few studies have addressed whether BP-type UV filters could bind and alter the structure and function of human serum albumin (HSA), the major carrier protein in plasma. Four benzophenones, BP-1, BP-2, BP-3 and BP-8 were selected to investigate their potentially toxic interactions with HSA and the intrinsic binding mechanism using combined spectroscopies and molecular docking techniques. Four benzophenones significantly quench the intrinsic fluorescence of HSA via static mode. The competitive binding fluorescence assay and molecular docking both revealed that the benzophenones bind at site II of HSA. Their binding constants range from 1.91 × 10(4)M(-1) to 12.96 × 10(4)M(-1) at 296 K. BP-8 interacts with HSA mainly through hydrogen bonding interactions and van der Waals interactions, while hydrophobic interactions and electrostatic interactions are dominant for interactions between BP-1, BP-2, BP-3 and HSA. Molecular docking revealed that the changes in structural moiety and hydrophobicity of four benzophenones account for their different binding affinities. As further revealed by circular dichroism and time-resolved fluorescence decay, these benzophenones cause global and local structural changes of HSA, which illustrates their potential toxicity to cause structural damage of HSA. Two degradation products of BP-3 have higher binding affinities to HSA, suggesting higher potencies in causing adverse effects on human health.
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Affiliation(s)
- Feng Zhang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
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164
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165
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Structural studies of several clinically important oncology drugs in complex with human serum albumin. Biochim Biophys Acta Gen Subj 2013; 1830:5356-74. [DOI: 10.1016/j.bbagen.2013.06.032] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/25/2013] [Accepted: 06/26/2013] [Indexed: 11/24/2022]
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166
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Fujiwara SI, Amisaki T. Fatty acid binding to serum albumin: Molecular simulation approaches. Biochim Biophys Acta Gen Subj 2013; 1830:5427-34. [DOI: 10.1016/j.bbagen.2013.03.032] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 03/26/2013] [Accepted: 03/28/2013] [Indexed: 02/02/2023]
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167
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Domonkos C, Fitos I, Visy J, Zsila F. Fatty Acid Modulated Human Serum Albumin Binding of the β-Carboline Alkaloids Norharmane and Harmane. Mol Pharm 2013; 10:4706-16. [DOI: 10.1021/mp400531n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Celesztina Domonkos
- Department of Biochemical
Pharmacology, Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, POB 17, H-1025, Budapest, Hungary
| | - Ilona Fitos
- Department of Biochemical
Pharmacology, Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, POB 17, H-1025, Budapest, Hungary
| | - Júlia Visy
- Department of Biochemical
Pharmacology, Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, POB 17, H-1025, Budapest, Hungary
| | - Ferenc Zsila
- Department of Biochemical
Pharmacology, Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, POB 17, H-1025, Budapest, Hungary
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168
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Crystal Structure of an HSA/FcRn Complex Reveals Recycling by Competitive Mimicry of HSA Ligands at a pH-Dependent Hydrophobic Interface. Structure 2013; 21:1966-78. [DOI: 10.1016/j.str.2013.08.022] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 08/17/2013] [Accepted: 08/23/2013] [Indexed: 11/23/2022]
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169
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Diosmin binding to human serum albumin and its preventive action against degradation due to oxidative injuries. Biochimie 2013; 95:2042-9. [DOI: 10.1016/j.biochi.2013.07.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Accepted: 07/12/2013] [Indexed: 11/20/2022]
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170
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Ozmen M, Maltas E, Patir IH, Bayrakci M. Combined voltammetric and spectroscopic investigation of binding interaction between nifedipine and human serum albumin on polyelectrolyte modified ITO electrode. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.08.130] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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171
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Li M, Lee P, Zhang Y, Ma Z, Yang F, Zhou Z, Wu X, Liang H. X-ray Crystallographic and Fluorometric Analysis of the Interactions of Rhein to Human Serum Albumin. Chem Biol Drug Des 2013; 83:167-73. [DOI: 10.1111/cbdd.12208] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 07/25/2013] [Accepted: 08/12/2013] [Indexed: 01/30/2023]
Affiliation(s)
- Mei Li
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan China
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
| | - Philbert Lee
- Ben May Department for Cancer Research; University of Chicago; Chicago 60637 IL USA
| | - Yao Zhang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
| | - ZhiYuan Ma
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
| | - Feng Yang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
| | - ZuPing Zhou
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
| | - XiaoYang Wu
- Ben May Department for Cancer Research; University of Chicago; Chicago 60637 IL USA
| | - Hong Liang
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan China
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; Guangxi Normal University; Guilin 541004 Guangxi China
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172
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Er JC, Vendrell M, Tang MK, Zhai D, Chang YT. Fluorescent dye cocktail for multiplex drug-site mapping on human serum albumin. ACS COMBINATORIAL SCIENCE 2013; 15:452-7. [PMID: 23941241 DOI: 10.1021/co400060b] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Elucidating how molecules bind to HSA is fundamental for predicting drug incompatibilities. Through combinatorial screening, we identified a novel fluorescent dye (BD140) with turn-on fluorescence emission and specific binding at HSA drug site 2. We further combined it with dansylamide to develop a fluorescent dye cocktail for high-throughput mapping of the interaction between therapeutics at HSA drug-binding sites.
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Affiliation(s)
- Jun Cheng Er
- Department of Chemistry, National University of Singapore, 3 Science Drive 2,
117543 Singapore
- Graduate
School for Integrative
Sciences and Engineering, National University of Singapore, Centre for Life Sciences, #05-01, 28 Medical Drive, 117456 Singapore
| | - Marc Vendrell
- MRC Centre for Inflammation Research,
Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Mui Kee Tang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2,
117543 Singapore
| | - Duanting Zhai
- Department of Chemistry, National University of Singapore, 3 Science Drive 2,
117543 Singapore
| | - Young-Tae Chang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2,
117543 Singapore
- Graduate
School for Integrative
Sciences and Engineering, National University of Singapore, Centre for Life Sciences, #05-01, 28 Medical Drive, 117456 Singapore
- Laboratory of Bioimaging Probe
Development, Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), 11 Biopolis
Way, 138667 Singapore
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173
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Zsila F. Circular Dichroism Spectroscopic Detection of Ligand Binding Induced Subdomain IB Specific Structural Adjustment of Human Serum Albumin. J Phys Chem B 2013; 117:10798-806. [DOI: 10.1021/jp4067108] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ferenc Zsila
- Laboratory
of Chemical Pharmacology, Institute of Molecular Pharmacology, Research Centre for Natural Sciences, POB 17, H-1025, Budapest, Hungary
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174
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Yang F, Ma ZY, Zhang Y, Li GQ, Li M, Qin JK, Lockridge O, Liang H. Human serum albumin-based design of a diflunisal prodrug. Eur J Pharm Biopharm 2013; 84:549-54. [DOI: 10.1016/j.ejpb.2013.01.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 01/14/2013] [Accepted: 01/21/2013] [Indexed: 10/27/2022]
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175
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The location of the high- and low-affinity bilirubin-binding sites on serum albumin: ligand-competition analysis investigated by circular dichroism. Biophys Chem 2013; 180-181:55-65. [PMID: 23838624 DOI: 10.1016/j.bpc.2013.06.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 05/28/2013] [Accepted: 06/04/2013] [Indexed: 12/20/2022]
Abstract
The locations of three bilirubin (BR)-binding sites with different affinities were identified as subdomains IB, IIA and IIIA for five mammalian serum albumins (SAs): human (HSA), bovine (BSA), rat, (RSA), rabbit (RbSA) and sheep (SSA). The stereoselectivity of a high-affinity BR-binding site was identified in the BR/SA=1/1 system by circular dichroism (CD) spectroscopy, the sites with low affinity to BR were analyzed using difference CD. Site-specific ligand-competition experiments with ibuprofen (marker for subdomain IIIA) and hemin (marker for subdomain IB) did not reveal any changes for the BR/SA=1/1 system and showed a decrease of the bound BR at BR/SA=3/1. Both sites were identified as sites with low affinity to BR. The correlation between stereoselectivity and the arrangement of Arg-Lys residues indicated similarity between the BR-binding sites in subdomain IIIA for all of the SAs studied. Subdomain IB in HSA, BSA, SSA and RbSA has P-stereoselectivity while in RSA it has M-selectivity toward BR. A ligand-competition experiment with gossypol shows a decrease of the CD signal of bound BR for the BR/SA=1/1 system as well as for BR/SA=3/1. Subdomain IIA was assigned as a high-affinity BR-binding site. The P-stereoselectivity of this site in HSA (and RSA, RbSA) was caused by the right-hand localization of charged residues R257/R218-R222, whereas the left-hand orientation of R257/R218-R199 led to the M-stereoselectivity of the primary binding site in BSA (and SSA).
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176
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Yamasaki K, Chuang VTG, Maruyama T, Otagiri M. Albumin-drug interaction and its clinical implication. Biochim Biophys Acta Gen Subj 2013; 1830:5435-43. [PMID: 23665585 DOI: 10.1016/j.bbagen.2013.05.005] [Citation(s) in RCA: 297] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 04/30/2013] [Accepted: 05/02/2013] [Indexed: 01/22/2023]
Abstract
BACKGROUND Human serum albumin acts as a reservoir and transport protein for endogenous (e.g. fatty acids or bilirubin) and exogenous compounds (e.g. drugs or nutrients) in the blood. The binding of a drug to albumin is a major determinant of its pharmacokinetic and pharmacodynamic profile. SCOPE OF REVIEW The present review discusses recent findings regarding the nature of drug binding sites, drug-albumin binding in certain diseased states or in the presence of coadministered drugs, and the potential of utilizing albumin-drug interactions in clinical applications. MAJOR CONCLUSIONS Drug-albumin interactions appear to predominantly occur at one or two specific binding sites. The nature of these drug binding sites has been fundamentally investigated as to location, size, charge, hydrophobicity or changes that can occur under conditions such as the content of the endogenous substances in question. Such findings can be useful tools for the analysis of drug-drug interactions or protein binding in diseased states. A change in protein binding is not always a problem in terms of drug therapy, but it can be used to enhance the efficacy of therapeutic agents or to enhance the accumulation of radiopharmaceuticals to targets for diagnostic purposes. Furthermore, several extracorporeal dialysis procedures using albumin-containing dialysates have proven to be an effective tool for removing endogenous toxins or overdosed drugs from patients. GENERAL SIGNIFICANCE Recent findings related to albumin-drug interactions as described in this review are useful for providing safer and efficient therapies and diagnoses in clinical settings. This article is part of a Special Issue entitled Serum Albumin.
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Affiliation(s)
- Keishi Yamasaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
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177
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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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178
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Filip Z, Jan K, Vendula S, Jana KZ, Kamil M, Kamil K. Albumin and α1-acid glycoprotein: old acquaintances. Expert Opin Drug Metab Toxicol 2013; 9:943-54. [DOI: 10.1517/17425255.2013.790364] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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179
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Wang Y, Yu H, Shi X, Luo Z, Lin D, Huang M. Structural mechanism of ring-opening reaction of glucose by human serum albumin. J Biol Chem 2013; 288:15980-7. [PMID: 23592780 DOI: 10.1074/jbc.m113.467027] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Glucose reacts with proteins nonenzymatically under physiological conditions. Such glycation is exacerbated in diabetic patients with high levels of blood sugar and induces various complications. Human albumin serum (HSA) is the most abundant protein in plasma and is glycated by glucose. The glycation sites on HSA remain controversial among different studies. Here, we report two protein crystal structures of HSA in complex with either glucose or fructose. These crystal structures reveal the presence of linear forms of sugar for both monosaccharides. The linear form of glucose forms a covalent bond to Lys-195 of HSA, but this is not the case for fructose. Based on these structures, we propose a mechanism for glucose ring opening involving both residues Lys-195 and Lys-199. These results provide mechanistic insights to understand the glucose ring-opening reaction and the glycation of proteins by monosaccharides.
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Affiliation(s)
- Yu Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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180
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Polticelli F, Caprari S, Gianni S, Ascenzi P. GA/GB fold switching may modulate fatty acid transfer from human serum albumin to bacteria. IUBMB Life 2013; 64:885-8. [PMID: 23086813 DOI: 10.1002/iub.1083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Human serum albumin (HSA) accounts for most of the functions of plasma. Among others, HSA serves as a carrier and a solubilizer for many endogenous and exogenous ligands, including fatty acids (FAs) as well as peptides and proteins such as the GA module of the bacterial poly(A)-binding (PAB) protein. Although the biological function(s) of the GA module of the bacterial PAB protein is unknown, the acquisition of the GA module adds selective advantages to the bacterium in terms of growth rate and increase in virulence, probably by providing the bacteria with FAs and, possibly, other nutrients transported by HSA. Here, we hypothesize that the GA module may undergo a structural transition from the all-α form to the 4β+α form typical of the GB domains upon binding of a FA molecule, as part of the mechanism which allows the bacterial PAB protein to extract FAs from HSA.
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181
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Hall ML, Jorgensen WL, Whitehead L. Automated Ligand- and Structure-Based Protocol for in Silico Prediction of Human Serum Albumin Binding. J Chem Inf Model 2013; 53:907-22. [DOI: 10.1021/ci3006098] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michelle Lynn Hall
- Novartis Institutes for Biomedical Research, 100 Technology Square, Cambridge,
Massachusetts 02143, United States
| | - William L. Jorgensen
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Lewis Whitehead
- Novartis Institutes for Biomedical Research, 100 Technology Square, Cambridge,
Massachusetts 02143, United States
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182
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Zsila F. Subdomain IB Is the Third Major Drug Binding Region of Human Serum Albumin: Toward the Three-Sites Model. Mol Pharm 2013; 10:1668-82. [DOI: 10.1021/mp400027q] [Citation(s) in RCA: 233] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ferenc Zsila
- Laboratory of Chemical Pharmacology,
Institute of Molecular
Pharmacology, Research Centre for Natural Sciences, H-1025 Budapest, Pusztaszeri út 59-67, Hungary
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183
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Vallianatou T, Lambrinidis G, Tsantili-Kakoulidou A. In silicoprediction of human serum albumin binding for drug leads. Expert Opin Drug Discov 2013; 8:583-95. [DOI: 10.1517/17460441.2013.777424] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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184
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In Silico Prediction of Interactions between Site II on Human Serum Albumin and Profen Drugs. ISRN PHARMACEUTICS 2013; 2013:818364. [PMID: 23533820 PMCID: PMC3606801 DOI: 10.1155/2013/818364] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 02/06/2013] [Indexed: 12/04/2022]
Abstract
Since binding of a drug molecule to human serum albumin (HSA) significantly affects the pharmacokinetics of the drug, it is highly desirable to predict the binding affinity of the drug. Profen drugs are a widely used class of nonsteroidal anti-inflammatory drugs and it has been reported that several members of the profen class specifically bind to one of the main binding sites named site II. The actual binding mode of only ibuprofen has been directly confirmed by X-ray crystallography. Therefore, it is of interest whether other profen drugs are site II binders. Docking simulations using multiple template structures of HSA from three crystal structures of complexes between drugs and HSA have demonstrated that most of the currently available profen drugs should be site II binders.
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185
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Jupin M, Michiels PJ, Girard FC, Spraul M, Wijmenga SS. NMR identification of endogenous metabolites interacting with fatted and non-fatted human serum albumin in blood plasma: Fatty acids influence the HSA-metabolite interaction. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2013; 228:81-94. [PMID: 23357430 DOI: 10.1016/j.jmr.2012.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 12/14/2012] [Accepted: 12/17/2012] [Indexed: 06/01/2023]
Abstract
Metabolites and their concentrations are direct reporters on body biochemistry. Thanks to technical developments metabolic profiling of body fluids, such as blood plasma, by for instance NMR has in the past decade become increasingly accurate enabling successful clinical diagnostics. Human Serum Albumin (HSA) is the main plasma protein (∼60% of all plasma protein) and responsible for the transport of endogenous (e.g. fatty acids) and exogenous metabolites, which it achieves thanks to its multiple binding sites and its flexibility. HSA has been extensively studied with regard to its binding of drugs (exogenous metabolites), but only to a lesser extent with regard to its binding of endogenous (non-fatty acid) metabolites. To obtain correct NMR measured metabolic profiles of blood plasma and/or potentially extract information on HSA and fatty acids content, it is necessary to characterize these endogenous metabolite/plasma protein interactions. Here, we investigate these metabolite-HSA interactions in blood plasma and blood plasma mimics. The latter contain the roughly twenty metabolites routinely detected by NMR (also most abundant) in normal relative concentrations with fatted or non-fatted HSA added or not. First, we find that chemical shift changes are small and seen only for a few of the metabolites. In contrast, a significant number of the metabolites display reduced resonance integrals and reduced free concentrations in the presence of HSA or fatted HSA. For slow-exchange (or strong) interactions, NMR resonance integrals report the free metabolite concentration, while for fast exchange (weak binding) the chemical shift reports on the binding. Hence, these metabolites bind strongly to HSA and/or fatted HSA, but to a limited degree because for most metabolites their concentration is smaller than the HSA concentration. Most interestingly, fatty acids decrease the metabolite-HSA binding quite significantly for most of the interacting metabolites. We further find that competition between the metabolites for binding is absent for most of these metabolites. These mappings in plasma mimics may thus open new opportunities for improved metabolic profiling of blood plasma. For instance, correct metabolite concentrations can be determined for the non-interacting metabolites and/or concentration corrections made for interacting metabolites. Secondly, the interacting metabolites could be used to act as reporters on HSA and fatty acid concentration in plasma, and thus potentially act as biomarker in diagnostic studies of trauma or cardiovascular diseases. Finally, we find in the blood plasma mimics that after ultrafiltration, commonly used to remove the protein from plasma, the measured concentration equals the total metabolite concentration, except for the strongest binding metabolite citrate.
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Affiliation(s)
- Marc Jupin
- Biophysical Chemistry, Institute for Materials and Molecules, Radboud University, Heyendaalseweg 135, 6524AJ Nijmegen, The Netherlands
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186
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Fani N, Bordbar AK, Ghayeb Y. A combined spectroscopic, docking and molecular dynamics simulation approach to probing binding of a Schiff base complex to human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:11-17. [PMID: 23228826 DOI: 10.1016/j.saa.2012.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 10/30/2012] [Accepted: 11/01/2012] [Indexed: 06/01/2023]
Abstract
The molecular mechanism of a Schiff base complex ((E)-((E)-2-(3-((E)-((E)-3(mercapto (methylthio) methylene)cyclopentylidene) amino) propylimino) cyclopentylidene) (methylthio) methanethiol) binding to Human Serum Albumin (HSA) was investigated by fluorescence quenching, absorption spectroscopy, molecular docking and molecular dynamics (MD) simulation procedures. The fluorescence emission of HSA was quenched by this Schiff base complex that has been analyzed for estimation of binding parameters. The titration of Schiff base solution by various amount of HSA was also followed by UV-Vis absorption spectroscopy and the corresponding data were analyzed by suitable models. The results revealed that this Schiff base has an ability to bind strongly to HSA and formed 1:1 complex. Energy transfer mechanism of quenching was discussed and the value of 5.45 ± 0.06 nm was calculated as the mean distance between the bound complex and the Trp residue. This is implying the high possibility of energy transfer from HSA to this Schiff base complex. Molecular docking results indicated that the main active binding site for this Schiff base complex is site III in subdomain IB. Moreover, MD simulation results suggested that this Schiff base complex can interact with HSA, without affecting the secondary structure of HSA but probably with a slight modification of its tertiary structure. MD simulations, molecular docking and experimental data reciprocally supported each other.
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Affiliation(s)
- N Fani
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
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187
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Aidas K, Olsen JMH, Kongsted J, Ågren H. Photoabsorption of Acridine Yellow and Proflavin Bound to Human Serum Albumin Studied by Means of Quantum Mechanics/Molecular Dynamics. J Phys Chem B 2013; 117:2069-80. [DOI: 10.1021/jp311863x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kȩstutis Aidas
- Department
of General Physics
and Spectroscopy, Faculty of Physics, Vilnius University, Saulėtekio al. 9, LT-10222 Vilnius, Lithuania
| | - Jógvan Magnus H. Olsen
- Department of Physics, Chemistry
and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Jacob Kongsted
- Department of Physics, Chemistry
and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Hans Ågren
- Department of Theoretical Chemistry
and Biology, School of Biotechnology, Royal Institute of Technology, SE-10691 Stockholm, Sweden
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188
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Abou-Zied OK, Al-Lawatia N, Elstner M, Steinbrecher TB. Binding of Hydroxyquinoline Probes to Human Serum Albumin: Combining Molecular Modeling and Förster’s Resonance Energy Transfer Spectroscopy to Understand Flexible Ligand Binding. J Phys Chem B 2013; 117:1062-74. [DOI: 10.1021/jp311238n] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Osama K. Abou-Zied
- Department of Chemistry, Faculty
of Science, Sultan Qaboos University, P.O.
Box 36, Postal Code 123, Muscat, Sultanate of Oman
| | - Najla Al-Lawatia
- Department of Chemistry, Faculty
of Science, Sultan Qaboos University, P.O.
Box 36, Postal Code 123, Muscat, Sultanate of Oman
| | - Marcus Elstner
- Department for Theoretical Chemical
Biology, Institute for Physical Chemistry, Kaiserstr. 12, Karlsruhe Institute of Technology, 76131 Karlsruhe,
Germany
| | - Thomas B. Steinbrecher
- Department for Theoretical Chemical
Biology, Institute for Physical Chemistry, Kaiserstr. 12, Karlsruhe Institute of Technology, 76131 Karlsruhe,
Germany
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189
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Er JC, Tang MK, Chia CG, Liew H, Vendrell M, Chang YT. MegaStokes BODIPY-triazoles as environmentally sensitive turn-on fluorescent dyes. Chem Sci 2013. [DOI: 10.1039/c3sc22166k] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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190
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Dobretsov G, Polyak B, Smolina N, Babushkina T, Syrejshchikova T, Klimova T, Sverbil V, Peregudov A, Gryzunov Y, Sarkisov O. Interaction of a fluorescent probe, CAPIDAN, with human serum albumin. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2012.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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191
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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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192
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Yang F, Lee P, Ma Z, Ma L, Yang G, Wu X, Liang H. Regulation of amantadine hydrochloride binding with IIA subdomain of human serum albumin by fatty acid chains. J Pharm Sci 2012; 102:84-92. [PMID: 23108589 DOI: 10.1002/jps.23336] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 08/24/2012] [Accepted: 09/17/2012] [Indexed: 12/11/2022]
Abstract
Human serum albumin (HSA) is a major protein component of blood plasma that has been exploited to bind and transport a wide variety of endogenous and exogenous organic compounds. Although anionic drugs readily associate with the IIA subdomain of HSA, most cationic drugs poorly associate with HSA at this subdomain. In this study, we propose to improve the association between cationic drugs and HSA by modifying HSA with fatty acid chains. For our experiments, we tested amantadine hydrochloride, a cationic drug with antiviral and antiparkinsonian effects. Our results suggest that extensive myristoylation of HSA can help stabilize the interaction between amantadine and HSA in vitro. Our X-ray crystallography data further elucidate the structural basis of this regulation. Additionally, our crystallography data suggest that anionic drugs, with a functional carboxylate group, may enhance the association between amantadine and HSA by a mechanism similar to myristoylation. Ultimately, our results provide critical structural insight into this novel association between cationic drugs and the HSA IIA subdomain, raising the tempting possibility to fully exploit the unique binding capacity of HSA's IIA subdomain to achieve simultaneous delivery of anionic and cationic drugs.
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Affiliation(s)
- Feng Yang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China. Guangxi Normal University, Guilin, Guangxi, China
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193
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Abstract
Hypoalbuminemia is frequently observed in hospitalized patients and it can be associated with several different diseases, including cirrhosis, malnutrition, nephrotic syndrome and sepsis. Regardless of its cause, hypoalbuminemia has a strong predictive value on mortality and morbidity. Over the years, the rationale for the use of albumin has been extensively debated and the indications for human serum albumin supplementation have changed. As the knowledge of the pathophysiological mechanisms of the pertinent diseases has increased, the indications for intravenous albumin supplementation have progressively decreased. The purpose of this brief article is to review the causes of hypoalbuminemia and the current indications for intravenous administration of albumin. Based on the available data and considering the costs, albumin supplementation should be limited to well-defined clinical scenarios and to include patients with cirrhosis and spontaneous bacterial peritonitis, patients with cirrhosis undergoing large volume paracentesis, the treatment of type 1 hepatorenal syndrome, fluid resuscitation of patients with sepsis, and therapeutic plasmapheresis with exchange of large volumes of plasma. While albumin supplementation is accepted also in other clinical situations such as burns, nephrotic syndrome, hemorrhagic shock and prevention of hepatorenal syndrome, within these contexts it does not represent a first-choice treatment nor is its use supported by widely accepted guidelines.
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Affiliation(s)
- Angelo Gatta
- Department of Medicine, University of Padova, Padua, Italy.
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194
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Bujacz A. Structures of bovine, equine and leporine serum albumin. ACTA CRYSTALLOGRAPHICA SECTION D: BIOLOGICAL CRYSTALLOGRAPHY 2012; 68:1278-89. [PMID: 22993082 DOI: 10.1107/s0907444912027047] [Citation(s) in RCA: 525] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 06/14/2012] [Indexed: 02/23/2023]
Abstract
Serum albumin first appeared in early vertebrates and is present in the plasma of all mammals. Its canonical structure supported by a conserved set of disulfide bridges is maintained in all mammalian serum albumins and any changes in sequence are highly correlated with evolution of the species. Previous structural investigations of mammalian serum albumins have only concentrated on human serum albumin (HSA), most likely as a consequence of crystallization and diffraction difficulties. Here, the crystal structures of serum albumins isolated from bovine, equine and leporine blood plasma are reported. The structure of bovine serum albumin (BSA) was determined at 2.47 Å resolution, two crystal structures of equine serum albumin (ESA) were determined at resolutions of 2.32 and 2.04 Å, and that of leporine serum albumin (LSA) was determined at 2.27 Å resolution. These structures were compared in detail with the structure of HSA. The ligand-binding pockets in BSA, ESA and LSA revealed different amino-acid compositions and conformations in comparison to HSA in some cases; however, much more significant differences were observed on the surface of the molecules. BSA, which is one of the most extensively utilized proteins in laboratory practice and is used as an HSA substitute in many experiments, exhibits only 75.8% identity compared with HSA. The higher resolution crystal structure of ESA highlights the binding properties of this protein because it includes several bound compounds from the crystallization solution that provide additional structural information about potential ligand-binding pockets.
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Affiliation(s)
- Anna Bujacz
- Institute of Technical Biochemistry, Lodz University of Technology, Stefanowskiego 4/10, 90-924 Lodz, Poland
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195
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Gyulkhandanyan A, Gyulkhandanyan L, Ghazaryan R, Fleury F, Angelini M, Gyulkhandanyan G, Sakanyan V. Assessment of new cationic porphyrin binding to plasma proteins by planar microarray and spectroscopic methods. J Biomol Struct Dyn 2012; 31:363-75. [PMID: 22871064 DOI: 10.1080/07391102.2012.703063] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Porphyrins have a unique aromatic structure determining particular photochemical properties that make them promising photosensitizers for anticancer therapy. Previously, we synthesized a set of artificial porphyrins by modifying side-chain functional groups and introducing different metals into the core structure. Here, we have performed a comparative study of the binding properties of 29 cationic porphyrins with plasma proteins by using microarray and spectroscopic approaches. The porphyrins were noncovalently immobilized onto hydrogel-covered glass slides and probed to bio-conjugated human and bovine serum albumins, as well as to human hemoglobin. The signal detection was carried out at the near-infrared fluorescence wavelength (800 nm) that enabled the effect of intrinsic visible wavelength fluorescence emitted by the porphyrins tested to be discarded. Competition assays on porphyrin microarrays indicated that long-chain fatty acids (FAs) (palmitic and stearic acids) decrease porphyrin binding to both serum albumin and hemoglobin. The binding affinity of different types of cationic porphyrins for plasma proteins was quantitatively assessed in the absence and presence of FAs by fluorescent and absorption spectroscopy. Molecular docking analysis confirmed results that new porphyrins and long-chain FAs compete for the common binding site FA1 in human serum albumin and meso-substituted functional groups in porphyrins play major role in the modulation of conformational rearrangements of the protein.
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Affiliation(s)
- Aram Gyulkhandanyan
- Institute of Biochemistry, National Academy of Sciences of Armenia, 5/1 P. Sevak str. 0014, Yerevan, Republic of Armenia
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196
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Chen ACH, Lee YL, Hou DYC, Fong SW, Peng Q, Pang RTK, Chiu PCN, Ho PC, Lee KF, Yeung WSB. Study of transforming growth factor alpha for the maintenance of human embryonic stem cells. Cell Tissue Res 2012; 350:289-303. [PMID: 22864984 PMCID: PMC3480587 DOI: 10.1007/s00441-012-1476-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 06/25/2012] [Indexed: 11/28/2022]
Abstract
Human embryonic stem cells (hESCs) have great potential for regenerative medicine as they have self-regenerative and pluripotent properties. Feeder cells or their conditioned medium are required for the maintenance of hESC in the undifferentiated state. Feeder cells have been postulated to produce growth factors and extracellular molecules for maintaining hESC in culture. The present study has aimed at identifying these molecules. The gene expression of supportive feeder cells, namely human foreskin fibroblast (hFF-1) and non-supportive human lung fibroblast (WI-38) was analyzed by microarray and 445 genes were found to be differentially expressed. Gene ontology analysis showed that 20.9% and 15.5% of the products of these genes belonged to the extracellular region and regulation of transcription activity, respectively. After validation of selected differentially expressed genes in both human and mouse feeder cells, transforming growth factor α (TGFα) was chosen for functional study. The results demonstrated that knockdown or protein neutralization of TGFα in hFF-1 led to increased expression of early differentiation markers and lower attachment rates of hESC. More importantly, TGFα maintained pluripotent gene expression levels, attachment rates and pluripotency by the in vitro differentiation of H9 under non-supportive conditions. TGFα treatment activated the p44/42 MAPK pathway but not the PI3K/Akt pathway. In addition, TGFα treatment increased the expression of pluripotent markers, NANOG and SSEA-3 but had no effects on the proliferation of hESCs. This study of the functional role of TGFα provides insights for the development of clinical grade hESCs for therapeutic applications.
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Affiliation(s)
- Andy C H Chen
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong, China
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197
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Ascenzi P, Gioia M, Fanali G, Coletta M, Fasano M. Pseudo-enzymatic hydrolysis of 4-nitrophenyl acetate by human serum albumin: pH-dependence of rates of individual steps. Biochem Biophys Res Commun 2012; 424:451-5. [DOI: 10.1016/j.bbrc.2012.06.131] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 06/24/2012] [Indexed: 10/28/2022]
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198
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Ding F, Diao JX, Sun Y, Sun Y. Bioevaluation of human serum albumin-hesperidin bioconjugate: insight into protein vector function and conformation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7218-7228. [PMID: 22702966 DOI: 10.1021/jf300424w] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hesperidin is a flavanone glycoside widely available for dietary intake in citrus fruits or citrus fruit derived products; however, exhaustive and reliable data are scarcely available for biological activity when it exerts protective health effects in humans. The principal intent of this work is to check binding domain and structural changes of human serum albumin (HSA), the primary carrier of flavonoids, in blood plasma association with hesperidin by employing molecular modeling, steady state and time-resolved fluorescence, and circular dichroism (CD) methods. From molecular modeling simulations, subdomains IIA and IIIA, which correspond to Sudlow's sites I and II, respectively, were earmarked to possess affinity for hesperidin, but the affinity of site I with flavanone is greater than that of site II. This corroborates the site-specific probe and hydrophobic 8-anilino-1-naphthalenesulfonic acid (ANS) displacement results placing the hesperidin at warfarin-azapropazone and indole-benzodiazepine sites. Steady state and time-resolved fluorescence manifested that static type, due to HSA-hesperidin complex formation (1.941 × 10(4) M(-1)), is the operative mechanism for the diminution in the tryptophan (Trp)-214 fluorescence. Moreover, via alterations in three-dimensional fluorescence and CD spectral properties, we can securely draw the conclusion that the polypeptide chain of HSA is partially destabilized after conjugation with hesperidin. We anticipate that this study can provide better knowledge of bioavailability such as absorption, biodistribution, and elimination, of hesperidin in vivo, to facilitate the comprehension of the biological responses to physiologically relevant flavanones.
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Affiliation(s)
- Fei Ding
- Department of Chemistry, China Agricultural University, Beijing 100193, China
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199
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Ascenzi P, Fasano M. Pseudo-enzymatic hydrolysis of 4-nitrophenyl myristate by human serum albumin. Biochem Biophys Res Commun 2012; 422:219-23. [DOI: 10.1016/j.bbrc.2012.04.111] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 04/20/2012] [Indexed: 11/25/2022]
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200
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Ding F, Li XN, Diao JX, Sun Y, Zhang L, Sun Y. Chiral recognition of metalaxyl enantiomers by human serum albumin: evidence from molecular modeling and photophysical approach. Chirality 2012; 24:471-80. [DOI: 10.1002/chir.22024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 02/23/2012] [Indexed: 01/27/2023]
Affiliation(s)
- Fei Ding
- Department of Chemistry; China Agricultural University; Beijing; China
| | - Xiu-Nan Li
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering; Chinese Academy of Sciences; Beijing; China
| | - Jian-Xiong Diao
- College of Resources and Environmental Sciences; China Agricultural University; Beijing; China
| | - Ye Sun
- Department of Chemistry; China Agricultural University; Beijing; China
| | - Li Zhang
- Key Laboratory of Pesticide Chemistry and Application Technology, Ministry of Agriculture, Department of Applied Chemistry; China Agricultural University; Beijing; China
| | - Ying Sun
- College of Resources and Environmental Sciences; China Agricultural University; Beijing; China
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