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Koroleva PI, Gilep AA, Kraevsky SV, Tsybruk TV, Shumyantseva VV. Improving the Efficiency of Electrocatalysis of Cytochrome P450 3A4 by Modifying the Electrode with Membrane Protein Streptolysin O for Studying the Metabolic Transformations of Drugs. BIOSENSORS 2023; 13:457. [PMID: 37185532 PMCID: PMC10136652 DOI: 10.3390/bios13040457] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/30/2023] [Accepted: 04/02/2023] [Indexed: 05/17/2023]
Abstract
In the present work, screen-printed electrodes (SPE) modified with a synthetic surfactant, didodecyldimethylammonium bromide (DDAB) and streptolysin O (SLO) were prepared for cytochrome P450 3A4 (CYP3A4) immobilization, direct non-catalytic and catalytic electrochemistry. The immobilized CYP3A4 demonstrated a pair of redox peaks with a formal potential of -0.325 ± 0.024 V (vs. the Ag/AgCl reference electrode). The electron transfer process showed a surface-controlled mechanism ("protein film voltammetry") with an electron transfer rate constant (ks) of 0.203 ± 0.038 s-1. Electrochemical CYP3A4-mediated reaction of N-demethylation of erythromycin was explored with the following parameters: an applied potential of -0.5 V and a duration time of 20 min. The system with DDAB/SLO as the electrode modifier showed conversion of erythromycin with an efficiency higher than the electrode modified with DDAB only. Confining CYP3A4 inside the protein frame of SLO accelerated the enzymatic reaction. The increases in product formation in the reaction of the electrochemical N-demethylation of erythromycin for SPE/DDAB/CYP3A4 and SPE/DDAB/SLO/CYP3A4 were equal to 100 ± 22% and 297 ± 7%, respectively. As revealed by AFM images, the SPE/DDAB/SLO possessed a more developed surface with protein cavities in comparison with SPE/DDAB for the effective immobilization of the CYP3A4 enzyme.
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Affiliation(s)
- Polina I. Koroleva
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
| | - Andrei A. Gilep
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
- Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus, 220141 Minsk, Belarus
| | - Sergey V. Kraevsky
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
| | - Tatiana V. Tsybruk
- Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus, 220141 Minsk, Belarus
| | - Victoria V. Shumyantseva
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
- Faculty of Biomedicine, Pirogov Russian National Research Medical University, Ostrovitianov Street, 1, 117997 Moscow, Russia
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Sreekumar S, Heidari M, Cheng Z, Maddali H, House K, Frei H, Galoppini E, O'Carroll DM. Self-Assembled Monolayers for Improved Charge Injection of Silver Back Electrodes in Inverted Organic Electronic Devices. ACS APPLIED MATERIALS & INTERFACES 2022; 14:38270-38280. [PMID: 35852106 DOI: 10.1021/acsami.2c07610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Self-assembled monolayers (SAMs) formed from thiol compounds bound to Ag and Au electrodes have been used as an important strategy in improving the stability and efficiency of optoelectronic devices. Thiol compounds provide only one binding site with the metal electrode which limits their influence. Dithiolane/dithiol compounds can provide multiple binding sites and could be useful in enhancing the performance of the device. In this study, inverted organic semiconducting hole-only devices were fabricated by using Ag back electrodes in conjunction with SAMs formed from disulfide lipoic acid-based compounds and were compared to a long aliphatic chain thiol. The binding and the electronic properties as well as electrical characteristics of the SAMs on silver were studied to look at the influence of their structure on charge injection in the organic semiconductor devices. It was found that the SAMs formed with (±)-α-lipoic acid, isolipoic acid, and (±)-4-phenylbutyl 5-(1,2-dithiolan-3-yl) pentanoate significantly improved the charge injection by either changing the work function of the Ag or altering the physical interaction between the polymer and the metal surface. This study may lead to an understanding of how the nature of the functional groups of the SAM and the number of bonds formed between each SAM molecule and the metal electrode influence the contact resistance and the performance of organic semiconductor devices.
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Affiliation(s)
- Sneha Sreekumar
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd., Piscataway, New Jersey 08854, United States
| | - Marzieh Heidari
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Zhongkai Cheng
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd., Piscataway, New Jersey 08854, United States
| | - Hemanth Maddali
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd., Piscataway, New Jersey 08854, United States
| | - Krystal House
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd., Piscataway, New Jersey 08854, United States
| | - Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, Berkeley, California 94720, United States
| | - Elena Galoppini
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Deirdre M O'Carroll
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd., Piscataway, New Jersey 08854, United States
- Department of Materials Science and Engineering, Rutgers University, 607 Taylor Rd., Piscataway, New Jersey 08854, United States
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Gabriunaite I, Valiūnienė A, Poderyte M, Ramanavicius A. Silane-based self-assembled monolayer deposited on fluorine doped tin oxide as model system for pharmaceutical and biomedical analysis. J Pharm Biomed Anal 2020; 177:112832. [PMID: 31473480 DOI: 10.1016/j.jpba.2019.112832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 08/09/2019] [Accepted: 08/21/2019] [Indexed: 11/28/2022]
Abstract
Recently, self-assembled monolayers (SAMs) are gaining a lot of interest due to their simplicity of preparation and wide applicability in the development of model systems used in pharmaceutical and biomedical analysis. The most efficient methods used for the investigation of SAM-based structures usually include cyclic voltammetry and electrochemical impedance spectroscopy. Scanning electrochemical microscopy (SECM) could be also used as an alternative method for SAM investigations, because this method enables to map modified surface. In this work, the surface of fluorine doped tin oxide (FTO) was modified with octadeciltrichlorosilane (OTS) based SAM and investigated using SECM. Measurements, which were carried out by SECM, lead to conclusion that highly heterogeneous and distributed monolayer has been formed on FTO surface.
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Affiliation(s)
- Inga Gabriunaite
- Department of Physical Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, LT- 03225 Vilnius, Lithuania
| | - Aušra Valiūnienė
- Department of Physical Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, LT- 03225 Vilnius, Lithuania
| | - Margarita Poderyte
- Department of Physical Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, LT- 03225 Vilnius, Lithuania
| | - Arunas Ramanavicius
- Department of Physical Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, LT- 03225 Vilnius, Lithuania; Laboratory of Nanotechnology, State Research Institute Centre of Physical Sciences and Technology, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania.
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Valiūnienė A, Petrulionienė T, Balevičiūtė I, Mikoliūnaitė L, Valinčius G. Formation of hybrid bilayers on silanized thin-film Ti electrode. Chem Phys Lipids 2016; 202:62-68. [PMID: 27964891 DOI: 10.1016/j.chemphyslip.2016.12.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 12/01/2016] [Accepted: 12/05/2016] [Indexed: 11/29/2022]
Abstract
Phospholipid bilayer membranes are essential elements of living organisms as they form boundaries between the intracellular cytoplasm and the extracellular environment, as well as organelles. In this work we report on our attempts to assemble artificial phospholipid bilayer model membranes on Ti surface. To provide hydrophobic cushion for phospholipids, the surface of a thin-film Ti electrode was initially functionalized with trichloro(octadecyl)silane (OTS). Increased hydrophobicity of the solid support allowed vesicle fusion and the formation of a hybrid 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) bilayer, as probed by the electrochemical impedance spectroscopy (EIS), contact angle measurements (CA) also by the Fourier transform-infrared (FT-IR) spectroscopy, spectroscopic ellipsometry (SE) and atomic force microscopy (AFM). Our study demonstrates the applicability of thin-film Ti electrodes for the formation of hybrid bilayer membranes. These membranes allow functional reconstitution of the pore-forming toxins and provide a bioanalytical platform for the detection of the activity of the cholesterol-dependent cytolysins.
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Affiliation(s)
- A Valiūnienė
- Department of Physical Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko 24, Vilnius LT-03225, Lithuania.
| | - T Petrulionienė
- Department of Physical Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko 24, Vilnius LT-03225, Lithuania
| | - I Balevičiūtė
- Department of Physical Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko 24, Vilnius LT-03225, Lithuania
| | - L Mikoliūnaitė
- Department of Physical Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko 24, Vilnius LT-03225, Lithuania
| | - G Valinčius
- Department of Chemistry and Bioengineering, Vilnius Gedimino Technical University, Sauletekio al. 11, LT-10223, Vilnius, Lithuania
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Hinman SS, Cheng Q. Bioinspired Assemblies and Plasmonic Interfaces for Electrochemical Biosensing. J Electroanal Chem (Lausanne) 2016; 781:136-146. [PMID: 28163664 PMCID: PMC5283611 DOI: 10.1016/j.jelechem.2016.05.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Electrochemical biosensing represents a collection of techniques that may be utilized for capture and detection of biomolecules in both simple and complex media. While the instrumentation and technological aspects play important roles in detection capabilities, the interfacial design aspects are of equal importance, and often, those inspired by nature produce the best results. This review highlights recent material designs, recognition schemes, and method developments as they relate to targeted electrochemical analysis for biological systems. This includes the design of electrodes functionalized with peptides, proteins, nucleic acids, and lipid membranes, along with nanoparticle mediated signal amplification mechanisms. The topic of hyphenated surface plasmon resonance assays is also discussed, as this technique may be performed concurrently with complementary and/or confirmatory measurements. Together, smart materials and experimental designs will continue to pave the way for complete biomolecular analyses of complex and technically challenging systems.
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Affiliation(s)
- Samuel S. Hinman
- Environmental Toxicology, University of California – Riverside, Riverside, CA 92521, USA
| | - Quan Cheng
- Environmental Toxicology, University of California – Riverside, Riverside, CA 92521, USA
- Department of Chemistry, University of California – Riverside, Riverside, CA 92521, USA
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Stewart SE, D'Angelo ME, Piantavigna S, Tabor RF, Martin LL, Bird PI. Assembly of streptolysin O pores assessed by quartz crystal microbalance and atomic force microscopy provides evidence for the formation of anchored but incomplete oligomers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:115-26. [DOI: 10.1016/j.bbamem.2014.10.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 09/20/2014] [Accepted: 10/03/2014] [Indexed: 11/24/2022]
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Budvytyte R, Pleckaityte M, Zvirbliene A, Vanderah DJ, Valincius G. Reconstitution of cholesterol-dependent vaginolysin into tethered phospholipid bilayers: implications for bioanalysis. PLoS One 2013; 8:e82536. [PMID: 24349307 PMCID: PMC3862629 DOI: 10.1371/journal.pone.0082536] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 10/24/2013] [Indexed: 11/18/2022] Open
Abstract
Functional reconstitution of the cholesterol-dependent cytolysin vaginolysin (VLY) from Gardnerella vaginalis into artificial tethered bilayer membranes (tBLMs) has been accomplished. The reconstitution of VLY was followed in real-time by electrochemical impedance spectroscopy (EIS). Changes of the EIS parameters of the tBLMs upon exposure to VLY solutions were consistent with the formation of water-filled pores in the membranes. It was found that reconstitution of VLY is a strictly cholesterol-dependent, irreversible process. At a constant cholesterol concentration reconstitution of VLY occurred in a concentration-dependent manner, thus allowing the monitoring of VLY concentration and activity in vitro and opening possibilities for tBLM utilization in bioanalysis. EIS methodology allowed us to detect VLY down to 0.5 nM (28 ng/mL) concentration. Inactivation of VLY by certain amino acid substitutions led to noticeably lesser tBLM damage. Pre-incubation of VLY with the neutralizing monoclonal antibody 9B4 inactivated the VLY membrane damage in a concentration-dependent manner, while the non-neutralizing antibody 21A5 exhibited no effect. These findings demonstrate the biological relevance of the interaction between VLY and the tBLM. The membrane-damaging interaction between VLY and tBLM was observed in the absence of the human CD59 receptor, known to strongly facilitate the hemolytic activity of VLY. Taken together, our study demonstrates the applicability of tBLMs as a bioanalytical platform for the detection of the activity of VLY and possibly other cholesterol-dependent cytolysins.
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Affiliation(s)
- Rima Budvytyte
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania
- Bio Complexity Department, The Niels Bohr Institute, Copenhagen University, Copenhagen, Denmark
| | - Milda Pleckaityte
- Department of Immunology and Cell Biology, Institute of Biotechnology, Vilnius University, Vilnius, Lithuania
| | - Aurelija Zvirbliene
- Department of Immunology and Cell Biology, Institute of Biotechnology, Vilnius University, Vilnius, Lithuania
| | - David J. Vanderah
- Biomolecular Structure and Function Group, National Institute of Standards and Technology at Institute of Bioscience and Biotechnology Research, Rockville, Maryland, United States of America
| | - Gintaras Valincius
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania
- * E-mail:
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Strulson MK, Maurer JA. Mechanistic insight into patterned supported lipid bilayer self-assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13652-13659. [PMID: 22935058 DOI: 10.1021/la300670a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Patterned supported lipid bilayers (SLBs) provide a model system for studying fluid lipid bilayers and transmembrane proteins in an array format. SLB arrays self-assemble on patterned self-assembled monolayers (SAMs) consisting of hexadecanethiol and glycol-terminated regions. While the mechanism of SLB formation on glass has been studied extensively, the formation of SLBs on other substrates is not necessarily well understood. Moreover, SLB arrays on patterned SAMs represent an intriguing system, since lipid vesicles do not adhere to glycol-terminated monolayers. Here, we utilize surface plasmon resonance imaging (SPRi) and kinetic analysis to examine the mechanism of SLB formation on the glycol-terminated regions of patterned SAMs and supported lipid monolayer (SLM) formation on alkyl-terminated regions of patterned SAMs. We determine that vesicles rupture to form a patterned SLB through a two-step mechanism that is dependent upon vesicle attachment at the interface of the two regions of the patterned monolayer.
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Affiliation(s)
- Matthew K Strulson
- Department of Chemistry, Washington University in St. Louis, Missouri 63130, USA
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Strulson MK, Maurer JA. Microcontact printing for creation of patterned lipid bilayers on tetraethylene glycol self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12052-12057. [PMID: 21866896 PMCID: PMC3188422 DOI: 10.1021/la201839w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Supported lipid bilayers (SLBs) formed on many different substrates have been widely used in the study of lipid bilayers. However, most SLBs suffer from inhomogeneities due to interactions between the lipid bilayer and the substrate. In order to avoid this problem, we have used microcontact printing to create patterned SLBs on top of ethylene-glycol-terminated self-assembled monolayers (SAMs). Glycol-terminated SAMs have previously been shown to resist absorbance of biomolecules including lipid vesicles. In our system, patterned lipid bilayer regions are separated by lipid monolayers, which form over the patterned hexadecanethiol portions of the surface. Furthermore, we demonstrate that α-hemolysin, a large transmembrane protein, inserts preferentially into the lipid bilayer regions of the substrate.
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Gheorghiu M, Olaru A, Tar A, Polonschii C, Gheorghiu E. Sensing based on assessment of non-monotonous effect determined by target analyte: Case study on pore-forming compounds. Biosens Bioelectron 2009; 24:3517-23. [PMID: 19497729 DOI: 10.1016/j.bios.2009.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 04/24/2009] [Accepted: 05/07/2009] [Indexed: 10/20/2022]
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Levin CS, Kundu J, Janesko BG, Scuseria GE, Raphael RM, Halas NJ. Interactions of ibuprofen with hybrid lipid bilayers probed by complementary surface-enhanced vibrational spectroscopies. J Phys Chem B 2008; 112:14168-75. [PMID: 18942873 PMCID: PMC4886502 DOI: 10.1021/jp804374e] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The incorporation of small molecules into lipid bilayers is a process of biological importance and clinical relevance that can change the material properties of cell membranes and cause deleterious side effects for certain drugs. Here we report the direct observation, using surface-enhanced Raman and IR spectroscopies (SERS, SEIRA), of the insertion of ibuprofen molecules into hybrid lipid bilayers. The alkanethiol-phospholipid hybrid bilayers were formed onto gold nanoshells by self-assembly, where the underlying nanoshell substrates provided the necessary enhancements for SERS and SEIRA. The spectroscopic data reveal specific interactions between ibuprofen and phospholipid moieties and indicate that the overall hydrophobicity of ibuprofen plays an important role in its intercalation in these membrane mimics.
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