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Argitekin E, Ersoz-Gulseven E, Cakan-Akdogan G, Akdogan Y. Dopamine-Conjugated Bovine Serum Albumin Nanoparticles Containing pH-Responsive Catechol-V(III) Coordination for In Vitro and In Vivo Drug Delivery. Biomacromolecules 2023; 24:3603-3618. [PMID: 37450837 PMCID: PMC10428161 DOI: 10.1021/acs.biomac.3c00363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/27/2023] [Indexed: 07/18/2023]
Abstract
V(III) instead of commonly used Fe(III) provided a rich tris-catechol-metal coordination at pH 7.4, which is important for slow drug release at physiological pH. Bovine serum albumin (BSA) functionalized with catechol-containing dopamine (D) and cross-linked using tris-catechol-V(III) coordination yielded pH-responsive compact D-BSA NPs (253 nm). However, conversion to bis- and/or mono-catechol-V(III) complexes in an acidic medium resulted in degradation of NPs and rapid release of doxorubicin (DOX). It was shown that D-BSA NPs entered cancerous MCF-7 cells (66%) more efficiently than non-cancerous HEK293T (33%) in 3 h. Also, DOX-loaded NPs reduced cell viability of MCF-7 by 75% and induced apoptosis in a majority of cells after 24 h. Biodegradability and lack of hemolytic activity were shown in vitro, whereas a lack of toxicity was shown in histological sections of zebrafish. Furthermore, 30% of circulating tumor cells in vasculature in 24 h were killed by DOX-loaded NPs shown with the zebrafish CTC xenograft model.
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Affiliation(s)
- Eda Argitekin
- Materials
Science and Engineering Department, Izmir
Institute of Technology, Izmir 35433, Turkey
| | | | - Gulcin Cakan-Akdogan
- Izmir
Biomedicine and Genome Center, Izmir 35340, Turkey
- Department
of Medical Biology, Faculty of Medicine, Dokuz Eylul University, Izmir 35340, Turkey
| | - Yasar Akdogan
- Materials
Science and Engineering Department, Izmir
Institute of Technology, Izmir 35433, Turkey
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2
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Ionic liquids as protein stabilizers for biological and biomedical applications: A review. Biotechnol Adv 2022; 61:108055. [DOI: 10.1016/j.biotechadv.2022.108055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/13/2022] [Accepted: 10/23/2022] [Indexed: 11/22/2022]
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3
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Interaction of ionic liquids with human serum albumin in the view of bioconcentration: a preliminary study. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-02021-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AbstractBioaccumulation potential is critical in PBT and risk assessment of chemicals. However, for ionic liquids (ILs), this aspect remains neglected. It is especially important to fill this gap, because for this group of compounds, existing data confirm their risk of being environmentally persistent and toxicity. Moreover, considering preliminary reports on the interactions of ILs with lipids, it may be assumed that ILs have a higher potential for bioaccumulation than indicated by previous estimations built upon octanol–water partition coefficients. Moreover, the bioconcentration of ionizable chemical compounds may also be strongly related to plasma protein contents. Therefore, in this work, the affinity of a set of imidazolium cations and organic anions, and their combination to human serum albumin (HSA) was determined. The obtained results reveal that both cations and anions can be strongly bound to HSA, and blood proteins might play an important role in overall bioaccumulation. Furthermore, it was observed that HSA binding properties towards IL cations depend on the hydrophobicity of cations. The obtained data also provide indication that cation–anion interaction may affect ILs ions affinity to HSA.
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4
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Haeri HH, Tomaszewski J, Phytides B, Schimm H, Möslein G, Niedergethmann M, Hinderberger D, Gelos M. Identification of Patients with Pancreatic Cancer by Electron Paramagnetic Resonance Spectroscopy of Fatty Acid Binding to Human Serum Albumin. ACS Pharmacol Transl Sci 2020; 3:1188-1198. [PMID: 33344896 DOI: 10.1021/acsptsci.0c00116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Indexed: 12/11/2022]
Abstract
An effective biological marker for pancreatic adenocarcinoma (PAC) is not available so far. Here, we investigate how electron paramagnetic resonance (EPR) spectroscopy of spin-labeled fatty acid (FA) molecules binding to human serum albumin (HSA) in human serum is a suitable method for the identification of patients with PAC through detection of PAC-induced changes of FA binding to albumin. The functionality of HSA to bind FA is investigated in serum samples of 35 patients with PAC, 26 patients with benign pancreatic tumors (BPD), and 24 healthy individuals by continuous wave (CW) EPR spectroscopy by simply dissolving 16-DOXYL stearic acid as spin-labeled FA. It is found that FA binding to HSA in PAC is significantly modified when compared with healthy and BPD individuals. The PAC group could best be discriminated from the healthy group based on EPR characteristics at the loading ratio of 1:4 (HSA:FA), while patients with PAC and BPD are distinguishable at a loading ratio of 1:6. Using nanoscale distance measurements through double electron-electron resonance (DEER), it is found that the distribution of FAs in the HSA of one PAC patient is similar to that of FAs in healthy individuals. Combining all EPR spectroscopic data, this leads to a tentative molecular interpretation of only small changes in hydration at the protein's surface as origin of the detectable characteristics for PAC patients. Thus, EPR of FA/HSA binding is a simple and promising tool for clinical detection of patients with PAC and needs to be tested with larger ensembles of different patient groups.
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Affiliation(s)
- Haleh H Haeri
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Jörg Tomaszewski
- Department of General and Visceral Surgery, Alfried Krupp Krankenhaus Essen, Essen, Nordrhein-Westfalen 45276, Germany
| | - Bettina Phytides
- Department of General and Visceral Surgery, Alfried Krupp Krankenhaus Essen, Essen, Nordrhein-Westfalen 45276, Germany
| | - Heike Schimm
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Gabriela Möslein
- Faculty of Health Sciences, University of Witten/Herdecke, Witten, Nordrhein-Westfalen 58448, Germany
| | - Marco Niedergethmann
- Department of General and Visceral Surgery, Alfried Krupp Krankenhaus Essen, Essen, Nordrhein-Westfalen 45276, Germany
| | - Dariush Hinderberger
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Marcos Gelos
- Faculty of Health Sciences, University of Witten/Herdecke, Witten, Nordrhein-Westfalen 58448, Germany
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5
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Demirkurt B, Cakan-Akdogan G, Akdogan Y. Preparation of albumin nanoparticles in water-in-ionic liquid microemulsions. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111713] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Haeri HH, Schunk B, Tomaszewski J, Schimm H, Gelos MJ, Hinderberger D. Fatty Acid Binding to Human Serum Albumin in Blood Serum Characterized by EPR Spectroscopy. ChemistryOpen 2019; 8:650-656. [PMID: 31143562 PMCID: PMC6532450 DOI: 10.1002/open.201900113] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/29/2019] [Indexed: 12/31/2022] Open
Abstract
One of the functions of Human Serum Albumin (HSA) is binding and transport of fatty acids. This ability could be altered by the presence of several blood components such as toxins or peptides - which in turn alters the functionality of the protein. We aim at characterizing HSA and its fatty acid binding in native serum environment. Native ligand binding and deviations from normal function can be monitored by electron paramagnetic resonance (EPR) spectroscopy using spin labeled fatty acids (FAs). Blood serum from healthy individuals is used to examine healthy HSA in its natural physiological conditions at different loading ratios of protein to FAs. Among the EPR spectroscopic parameters (like hyperfine coupling, line shape, rotational correlation time and population of different binding sites) the rotational correlation time is found to differ significantly between binding sites of the protein, especially at loading ratios of four FAs per HSA. Although differences are observed between individual samples, a general trend regarding the dynamics of healthy HSA at different loading ratios could be obtained and compared to a reference of purified commercially available HSA in buffer.
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Affiliation(s)
- Haleh H. Haeri
- Institut für ChemieMartin-Luther-Universität Halle-WittenbergVon-Danckelmann-Platz 406120Halle (Saale)Germany
| | - Bettina Schunk
- Department of General and Visceral SurgeryAlfried Krupp Krankenhaus EssenHellweg 10045276EssenGermany
| | - Jörg Tomaszewski
- Department of General and Visceral SurgeryAlfried Krupp Krankenhaus EssenHellweg 10045276EssenGermany
| | - Heike Schimm
- Institut für ChemieMartin-Luther-Universität Halle-WittenbergVon-Danckelmann-Platz 406120Halle (Saale)Germany
| | - Marcos J. Gelos
- Department of General and Visceral SurgeryAlfried Krupp Krankenhaus EssenHellweg 10045276EssenGermany
- Faculty of Health sciencesUniversity of Witten / HerdeckeAlfred-Herrhausen-Straße 5058455WittenGermany
| | - Dariush Hinderberger
- Institut für ChemieMartin-Luther-Universität Halle-WittenbergVon-Danckelmann-Platz 406120Halle (Saale)Germany
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7
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Exploring the pH-Induced Functional Phase Space of Human Serum Albumin by EPR Spectroscopy. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4040047] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A systematic study on the self-assembled solution system of human serum albumin (HSA) and paramagnetic doxyl stearic acid (5-DSA and 16-DSA) ligands is reported covering the broad pH range 0.7–12.9, mainly using electron paramagnetic resonance (EPR) methods. It is tested to which extent the pH-induced conformational isomers of HSA reveal themselves in continuous wave (CW) EPR spectra from this spin probing approach in comparison to an established spin-labeling strategy utilizing 3-maleimido proxyl (5-MSL). Most analyses are conducted on empirical levels with robust strategies that allow for the detection of dynamic changes of ligand, as well as protein. Special emphasis has been placed on the EPR spectroscopic detection of a molten globule (MG) state of HSA that is typically found by the fluorescent probe 8-Anilino- naphthalene-1-sulfonic acid (ANS). Moreover, four-pulse double electron-electron resonance (DEER) experiments are conducted and substantiated with dynamic light scattering (DLS) data to determine changes in the solution shape of HSA with pH. All results are ultimately combined in a detailed scheme that describes the pH-induced functional phase space of HSA.
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8
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Development of an Ionic Liquid Based Method for the Preparation of Albumin Nanoparticles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801648] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Maleimido-proxyl as an EPR spin label for the evaluation of conformational changes of albumin. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2017; 46:773-787. [DOI: 10.1007/s00249-017-1257-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 08/04/2017] [Accepted: 09/16/2017] [Indexed: 11/25/2022]
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10
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Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
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11
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Tatlidil D, Ucuncu M, Akdogan Y. Physiological concentrations of albumin favor drug binding. Phys Chem Chem Phys 2015; 17:22678-85. [DOI: 10.1039/c5cp03583j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We exploit the direct measurements of spin labeled drugs to study drug binding to/release from protein using EPR spectroscopy.
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Affiliation(s)
- D. Tatlidil
- Materials Science and Engineering Department
- Ízmir Institute of Technology
- Ízmir
- Turkey
| | - M. Ucuncu
- Department of Chemistry
- Ízmir Institute of Technology
- Ízmir
- Turkey
| | - Y. Akdogan
- Materials Science and Engineering Department
- Ízmir Institute of Technology
- Ízmir
- Turkey
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12
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Pavićević AA, Popović-Bijelić AD, Mojović MD, Šušnjar SV, Bačić GG. Binding of Doxyl Stearic Spin Labels to Human Serum Albumin: An EPR Study. J Phys Chem B 2014; 118:10898-905. [DOI: 10.1021/jp5068928] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Aleksandra A. Pavićević
- Faculty
of Physical Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Ana D. Popović-Bijelić
- Faculty
of Physical Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Miloš D. Mojović
- Faculty
of Physical Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | | | - Goran G. Bačić
- Faculty
of Physical Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
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13
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Kattnig DR, Reichenwallner J, Hinderberger D. Modeling Excluded Volume Effects for the Faithful Description of the Background Signal in Double Electron–Electron Resonance. J Phys Chem B 2013; 117:16542-57. [DOI: 10.1021/jp408338q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jörg Reichenwallner
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Institute
of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz
4, 06120 Halle (Saale), Germany
| | - Dariush Hinderberger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Institute
of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz
4, 06120 Halle (Saale), Germany
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14
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Binding, unfolding and refolding dynamics of serum albumins. Biochim Biophys Acta Gen Subj 2013; 1830:5394-404. [PMID: 23707713 DOI: 10.1016/j.bbagen.2013.05.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 05/08/2013] [Accepted: 05/13/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND The serum albumins (human and bovine serum albumin) occupy a seminal position among all proteins investigated until today as they are the most abundant circulatory proteins. They play the major role of a transporter of many bio-active substances which include various fatty acids, drug molecules, and amino acids to the target cells. Hence, studying the interaction of these serum albumins with different binding agents has attracted enormous research interests from decades. The nature and magnitude of these bindings have direct consequence on drug delivery, pharmacokinetics, therapeutic efficacy and drug design and control. SCOPE OF THE REVIEW In the present review, we summarize the binding characteristics of both the serum albumins with surfactants, lipids and vesicles, polymers and dendrimers, nanomaterials and drugs. Finally we have reviewed the effect of various chemical and physical denaturants on these albumins with a special emphasis on protein unfolding and refolding dynamics. MAJOR CONCLUSIONS The topic of binding and dynamics of protein unfolding and refolding spans across all areas of inter-disciplinary sciences and will benefit clinical toxicology and medicines. The extensive data from several contemporary research based on albumins will help us to understand protein dynamics in a more illustrious manner. GENERAL SIGNIFICANCE These data have immense significance in understanding and unravelling the mechanisms of protein unfolding/refolding and thus can pave the way to prevent protein mis-folding/aggregation which sometimes leads to severe consequences like Parkinson's and Alzheimer's diseases. This article is a part of a Special Issue entitled Serum Albumin. This article is part of a Special Issue entitled Serum Albumin.
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Reichenwallner J, Hinderberger D. Using bound fatty acids to disclose the functional structure of serum albumin. Biochim Biophys Acta Gen Subj 2013; 1830:5382-93. [PMID: 23643928 DOI: 10.1016/j.bbagen.2013.04.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 11/16/2022]
Abstract
BACKGROUND Serum albumin is a major transport protein in mammals and is known to have at least seven binding sites for long-chain fatty acids (FAs). SCOPE OF REVIEW We have devised a new electron paramagnetic resonance (EPR) spectroscopic approach to gain information on the functional structure of serum albumin in solution in a "coarse-grained" manner from the ligands' point of view. Our approach is based on using spin labeled (paramagnetic) stearic acids self-assembled with albumin and subsequent nanoscale distance measurements between the FAs using double electron-electron resonance spectroscopy (DEER). Simple continuous wave (CW) EPR spectroscopy, which allows for quantification of bound ligands, complements our studies. MAJOR CONCLUSIONS Based on DEER nanoscale distance measurements, the functional solution structure of human serum albumin (HSA) has remarkably been found to have a much more symmetric distribution of entry points to the FA binding sites than expected from the crystal structure, indicating increased surface flexibility and plasticity for HSA in solution. In contrast, for bovine serum albumin (BSA), the entry point topology is in good agreement with that expected from the crystal structure of HSA. Changes in the solution structures between albumins can hence be revealed and extended to more albumins to detect functional differences at the nanoscale. Going beyond fundamental structural studies, our research platform is also excellently suited for general studies of protein-solvent interactions, temperature effects and ligand binding. GENERAL SIGNIFICANCE We discuss how our research platform helps illuminate protein dynamics and function and can be used to characterize albumin-based hybrid materials. This article is part of a Special Issue entitled Serum Albumin.
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Affiliation(s)
- Jörg Reichenwallner
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany; Institute for Pharmacy and Biochemistry, Johannes Gutenberg-Universität Mainz, Johann-Joachim-Becher-Weg 30, D-55128 Mainz, Germany
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16
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Kuan SL, Stöckle B, Reichenwallner J, Ng DYW, Wu Y, Doroshenko M, Koynov K, Hinderberger D, Müllen K, Weil T. Dendronized albumin core-shell transporters with high drug loading capacity. Biomacromolecules 2013; 14:367-76. [PMID: 23210662 DOI: 10.1021/bm301531c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We describe the synthesis of a core-shell biohybrid consisting of a human serum albumin (HSA) core that serves as a reservoir for lipophilic molecules and a cationized shell region consisting of ethynyl-G2.0-PAMAM or ethynyl-G3.0-PAMAM dendrons. The binding capacity of lipophilic guests was quantified applying electron paramagnetic resonance (EPR) spectroscopy, and five to six out of seven pockets were still available compared with HSA. The attachment of ethynyl-G2.0-PAMAM dendrons to HSA yielded a nontoxic core-shell macromolecule that was clearly uptaken by A549 human epithelial cells due to the presence of the dendritic PAMAM shell. Significantly higher loading of doxorubicin was observed for dendronized G2-DHSA compared with the native protein due to the availability of binding pockets of the HSA core, and interaction with the dendritic shell. Dendronized G2-DHSA-doxorubicin displayed significant cytotoxicity resulting from high drug loading and high stability under different conditions, thus demonstrating its great potential as a transporter for drug molecules.
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Affiliation(s)
- Seah Ling Kuan
- Institute of Organic Chemistry III, University of Ulm, Albert-Einstein-Allee 11, Ulm, Germany
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17
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Akdogan Y, Reichenwallner J, Hinderberger D. Evidence for water-tuned structural differences in proteins: an approach emphasizing variations in local hydrophilicity. PLoS One 2012; 7:e45681. [PMID: 23049837 PMCID: PMC3458090 DOI: 10.1371/journal.pone.0045681] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 08/22/2012] [Indexed: 11/19/2022] Open
Abstract
We present experimental evidence for the significant effect that water can have on the functional structure of proteins in solution. Human (HSA) and Bovine Serum Albumin (BSA) have an amino acid sequence identity of 75.52% and are chosen as model proteins. We employ EPR-based nanoscale distance measurements using double electron-electron resonance (DEER) spectroscopy and both albumins loaded with long chain fatty acids (FAs) in solution to globally (yet indirectly) characterize the tertiary protein structures from the bound ligands’ points of view. The complete primary structures and crystal structures of HSA and as of recently also BSA are available. We complement the picture as we have recently determined the DEER-derived solution structure of HSA and here present the corresponding BSA solution structure. The characteristic asymmetric FA distribution in the crystal structure of HSA can surprisingly be observed by DEER in BSA in solution. This indicates that the BSA conformational ensemble in solution seems to be narrow and close to the crystal structure of HSA. In contrast, for HSA in solution a much more symmetric FA distribution was found. Thus, conformational adaptability and flexibility dominate in the HSA solution structure while BSA seems to lack these properties. We further show that differences in amino acid hydropathies of specific structural regions in both proteins can be used to correlate the observed difference in the global (tertiary) solution structures with the differences on the primary structure level.
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Affiliation(s)
- Yasar Akdogan
- Max Planck Institute for Polymer Research, Mainz, Germany
| | - Jörg Reichenwallner
- Max Planck Institute for Polymer Research, Mainz, Germany
- Institut für Pharmazie und Biochemie, Johannes Gutenberg-Universität Mainz, Mainz, Germany
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18
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Naushad M, Alothman ZA, Khan AB, Ali M. Effect of ionic liquid on activity, stability, and structure of enzymes: a review. Int J Biol Macromol 2012; 51:555-60. [PMID: 22732130 DOI: 10.1016/j.ijbiomac.2012.06.020] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 06/12/2012] [Accepted: 06/14/2012] [Indexed: 10/28/2022]
Abstract
Ionic liquids have shown their potential as a solvent media for many enzymatic reactions as well as protein preservation, because of their unusual characteristics. It is also observed that change in cation or anion alters the physiochemical properties of the ionic liquids, which in turn influence the enzymatic reactions by altering the structure, activity, enatioselectivity, and stability of the enzymes. Thus, it is utmost need of the researchers to have full understanding of these influences created by ionic liquids before choosing or developing an ionic liquid to serve as solvent media for enzymatic reaction or protein preservation. So, in the present review, we try to shed light on effects of ionic liquids chemistry on structure, stability, and activity of enzymes, which will be helpful for the researchers in various biocatalytic applications.
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Affiliation(s)
- Mu Naushad
- Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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19
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Sankaranarayanan K, Sathyaraj G, Nair B, Dhathathreyan A. Reversible and Irreversible Conformational Transitions in Myoglobin: Role of Hydrated Amino Acid Ionic Liquid. J Phys Chem B 2012; 116:4175-80. [DOI: 10.1021/jp300596z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - B.U. Nair
- Chemical Lab, CSIR-CLRI,
Adyar, Chennai 600020, India
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