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Zacharovas E, Velička M, Platkevičius G, Čekauskas A, Želvys A, Niaura G, Šablinskas V. Toward a SERS Diagnostic Tool for Discrimination between Cancerous and Normal Bladder Tissues via Analysis of the Extracellular Fluid. ACS OMEGA 2022; 7:10539-10549. [PMID: 35382275 PMCID: PMC8973049 DOI: 10.1021/acsomega.2c00058] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/03/2022] [Indexed: 05/09/2023]
Abstract
Vibrational spectroscopy provides the possibility for sensitive and precise detection of chemical changes in biomolecules due to development of cancers. In this work, label-free near-infrared surface enhanced Raman spectroscopy (SERS) was applied for the differentiation between cancerous and normal human bladder tissues via analysis of the extracellular fluid of the tissue. Specific cancer-related SERS marker bands were identified by using a 1064 nm excitation wavelength. The prominent spectral marker band was found to be located near 1052 cm-1 and was assigned to the C-C, C-O, and C-N stretching vibrations of lactic acid and/or cysteine molecules. The correct identification of 80% of samples is achieved with even limited data set and could be further improved. The further development of such a detection method could be implemented in clinical practice for the aid of surgeons in determining of boundaries of malignant tumors during the surgery.
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Affiliation(s)
- Edvinas Zacharovas
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekis Avenue 3, LT-10257 Vilnius, Lithuania
| | - Martynas Velička
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekis Avenue 3, LT-10257 Vilnius, Lithuania
| | - Gediminas Platkevičius
- Clinic
of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical
Medicine, Faculty of Medicine, Vilnius University, M.K. Čiurlionio st. 21/27, LT-03101 Vilnius, Lithuania
| | - Albertas Čekauskas
- Clinic
of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical
Medicine, Faculty of Medicine, Vilnius University, M.K. Čiurlionio st. 21/27, LT-03101 Vilnius, Lithuania
| | - Aru̅nas Želvys
- Clinic
of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical
Medicine, Faculty of Medicine, Vilnius University, M.K. Čiurlionio st. 21/27, LT-03101 Vilnius, Lithuania
| | - Gediminas Niaura
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekis Avenue 3, LT-10257 Vilnius, Lithuania
- Department
of Organic Chemistry, Center for Physical
Sciences and Technology (FTMC), Saulėtekis Avenue 3, LT 10257, Vilnius, Lithuania
| | - Valdas Šablinskas
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekis Avenue 3, LT-10257 Vilnius, Lithuania
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Proniewicza E, Tąta A, Starowicz M, Wójcik A, Pacek J, Molenda M. Is the electrochemical or the “green chemistry” method the optimal method for the synthesis of ZnO nanoparticles for applications to biological material? Characterization and SERS on ZnO. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Reflection Absorption Infrared Spectroscopy Characterization of SAM Formation from 8-Mercapto- N-(phenethyl)octanamide Thiols with Phe Ring and Amide Groups. Molecules 2020; 25:molecules25235633. [PMID: 33265984 PMCID: PMC7730404 DOI: 10.3390/molecules25235633] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/20/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022] Open
Abstract
Multifunctional amide-containing self-assembled monolayers (SAMs) provide prospects for the construction of interfaces with required physicochemical properties and distinctive stability. In this study, we report the synthesis of amide-containing thiols with terminal phenylalanine (Phe) ring functionality (HS(CH2)7CONH(CH2)2C6H5) and the characterization of the formation of SAMs from these thiols on gold by reflection absorption infrared spectroscopy (RAIRS). For reliable assignments of vibrational bands, ring deuterated analogs were synthesized and studied as well. Adsorption time induced changes in Amide-II band frequency and relative intensity of Amide-II/Amide-I bands revealed two-state sigmoidal form dependence with a transition inflection points at 2.2 ± 0.5 and 4.7 ± 0.5 min, respectively. The transition from initial (disordered) to final (hydrogen-bonded, ordered) structure resulted in increased Amide-II frequency from 1548 to 1557 cm-1, which is diagnostic for a strongly hydrogen-bonded amide network in trans conformation. However, the lateral interactions between the alkyl chains were found to be somewhat reduced when compared with well-ordered alkane thiol monolayers.
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Wu F, Huang Y, Yu F, Li Z, Ding CF. Effect of Transition-Metal Ions on the Conformation of Encephalin Investigated by Hydrogen/Deuterium Exchange and Theoretical Calculations. J Phys Chem B 2020; 124:101-109. [PMID: 31829598 DOI: 10.1021/acs.jpcb.9b09919] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have studied the effects of different 3d orbitals in divalent transition-metal ions [G2+ = Mn2+ (d5), Fe2+ (d6), Co2+ (d7), Ni2+ (d8), Cu2+ (d9), or Zn2+ (d10)] on the conformations of leucine encephalin (LE) and methionine encephalin (ME) in the gas phase using hydrogen/deuterium exchange mass spectrometry (HDX-MS) and theoretical calculations at the molecular level. The HDX-MS reveals a 1:1 stoichiometric monovalent complex of [LE/ME + G - H]+ and observed that the different HDX reactivities follow the trend Fe2+ < Co2+ < Ni2+ < Mn2+ < Cu2+ ≈ Zn2+ and that [ME + Mn/Cu/Zn - H]+ > [LE + Mn/Cu/Zn - H]+, while [LE + Fe/Co/Ni - H]+ > [ME + Fe/Co/Ni - H]+. We cross-correlated the collision-induced dissociation energies of the complexes with the HDX results and found that the more stable the complex, the harder it is for it to undergo HDX. Furthermore, we used theoretical calculations to optimize the favorable conformations of the complexes and found the same interaction structure of G2+ coordination with the five carbonyl oxygens of LE/ME that have different bond lengths. Finally, we calculated the proton affinity (PA) values of the optimized complexes in order to interpret the HDX observations that the higher the PA values, the more difficult it is for the complex to undergo HDX. Overall, both the experiments and the theoretical calculations show that the six metal ions have different effects on the LE/ME conformation, with the low-energy stability of the G2+ 3d orbitals corresponding to more dramatic effects on the LE/ME conformation. In addition, the hardness of the ionic acid corresponding to the fully filled Mn2+ and half-filled Zn2+ orbitals also contributes strongly to the coordination effect; the conformation effect of Fe2+/Co2+/Ni2+ on LE is greater than that on ME, whereas the conformation effect of Mn2+/Cu2+/Zn2+ on ME is greater than that on LE.
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Affiliation(s)
- Fangling Wu
- Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering , Ningbo University , Ningbo , Zhejiang 315211 , China
| | - Yandong Huang
- Department of Chemistry , Fudan University , Shanghai 200438 , China
| | - Fanzhen Yu
- Department of Chemistry , Fudan University , Shanghai 200438 , China
| | - Zhenhua Li
- Department of Chemistry , Fudan University , Shanghai 200438 , China
| | - Chuan-Fan Ding
- Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering , Ningbo University , Ningbo , Zhejiang 315211 , China
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Proniewicz E, Tąta A, Starowicz M, Szkudlarek A, Pacek J, Molenda M, Kuśtrowski P. Ions-free electrochemically synthetized in aqueous media flake-like CuO nanostructures as SERS reproducible substrates for the detection of neurotransmitters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 215:24-33. [PMID: 30825867 DOI: 10.1016/j.saa.2019.02.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/28/2019] [Accepted: 02/16/2019] [Indexed: 06/09/2023]
Abstract
The process of catalytic destruction of tumor cells can be strengthened by introducing copper(II) oxide nanostructures (CuONSs) with receptor's agonists/antagonists immobilized on their surface. Here we show a simple and reliable electrochemical method for the fabrication ions-free flake-like CuO nanostructures in a surfactant/ions free aqueous environment. For the determination of the metal surface plasmon, size, rheology, and structure of the fabricated nanostructures ultraviolet-visible (UV-Vis), Fourier-transform infrared (FT-IR), Raman, and X-ray photoelectron (XPS) spectroscopies as well as scanning electron microscope (SEM), high-resolution transmission electron microscopy with energy dispersive X-ray (HDTEM-EDS), X-ray powder diffraction (XRD), and dynamic light scattering (DLS) analysis were used. The fabricated nanostructures were used as highly sensitive, uniform, and reproducible sensors of a natural ligand (bombesin) of some types of metabotropic seven transmembrane G protein-coupled superfamily receptors (GPCRs), which are over-express on the surface of many malignant tumors. Surface-enhanced Raman scattering (SERS) was used to monitor the geometry of adsorbate, separate, enrich, and detect various bombesin C-terminal fragments. It has been shown that the type of used substrate, surface development, and ions present in the solution have little effect on the mode of adsorption.
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Affiliation(s)
- Edyta Proniewicz
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland.
| | - Agnieszka Tąta
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland
| | - Maria Starowicz
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland
| | - Aleksandra Szkudlarek
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-055 Krakow, Poland
| | - Joanna Pacek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Marcin Molenda
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
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Tąta A, Szkudlarek A, Kim Y, Proniewicz E. Interaction of bombesin and its fragments with gold nanoparticles analyzed using surface-enhanced Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:251-256. [PMID: 27665193 DOI: 10.1016/j.saa.2016.09.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 09/07/2016] [Accepted: 09/17/2016] [Indexed: 06/06/2023]
Abstract
This work demonstrates the application of commercially available stable surface composed of gold nanograins with diameters ranging from 70 to 226nm deposited onto silicon wafer for surface-enhanced Raman scattering investigations of biologically active compounds, such as bombesin (BN) and its fragments. BN is an important neurotransmitter involved in a complex signaling pathways and biological responses; for instance, hypertensive action, contractive on uterus, colon or ileum, locomotor activity, stimulation of gastric and insulin secretion as well as growth promotion of various tumor cell lines, including: lung, prostate, stomach, colon, and breast. It has also been shown that 8-14 BN C-terminal fragment partially retains the biological activity of BN. The SERS results for BN and its fragment demonstrated that (1) three amino acids from these peptides sequence; i.e., l-histidine, l-methionine, and l-tryptophan, are involved in the interaction with gold coated silicon wafer and (2) the strength of these interactions depends upon the aforementioned amino acids position in the peptide sequence.
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Affiliation(s)
- Agnieszka Tąta
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland
| | - Aleksandra Szkudlarek
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-055 Krakow, Poland
| | - Younkyoo Kim
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 449-791, Republic of Korea
| | - Edyta Proniewicz
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland.
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7
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Frontiers of two-dimensional correlation spectroscopy. Part 2. Perturbation methods, fields of applications, and types of analytical probes. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.01.016] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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8
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Ignatjev I, Proniewicz E, Proniewicz LM, Niaura G. Effect of potential on temperature-dependent SERS spectra of neuromedin B on Cu electrode. Phys Chem Chem Phys 2013. [PMID: 23202809 DOI: 10.1039/c2cp42077e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Adsorption of decapeptide neuromedin B (NMB) on copper electrode has been investigated by in situ surface-enhanced Raman scattering (SERS) spectroelectrochemistry in the temperature interval from 12 to 72 °C at -0.600 and -1.000 V potentials. It was found that intensities of peptide bands decrease at temperatures above 30 °C with higher decrease slope at -1.000 V. Frequency of F12 mode (1004 cm(-1)) of non-surface-interactive phenylalanine residue was found to be insensitive to temperature variation at both studied electrode potentials, while frequency-temperature curves for surface-interactive groups (Amide-III, methylene) were found to be controlled by the potential. In particular, opposite frequency-temperature trends were detected for Amide-III (Am-III) mode indicating decrease in H-bonding interaction strength of amide C[double bond, length as m-dash]O and N-H groups above 38 °C for -0.600 V, and increase in H-bonding interaction strength between 12 and 72 °C for -1.000 V. Anomalous Am-III temperature-dependence of the frequency at -1.000 V was explained by temperature-induced transformation of a disordered secondary structure to a helix-like conformation. The potential-difference spectrum revealed interaction of methylene groups with Cu surface at sufficiently negative potential values because of the appearance of a soft C-H stretching band near 2825 cm(-1) and a broad band near 2904 cm(-1) assigned to vibration of a distal C-H bond of the surface-confined methylene group. Consequently, a rapid decrease in frequency of CH(2)-stretching band with temperature was observed at -1.000 V, while no essential frequency changes were detected for this mode at -0.600 V. The results show that electrode potential controls the temperature-dependence of the frequency for vibrations associated with surface-interactive molecular groups.
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Affiliation(s)
- Ilja Ignatjev
- Institute of Chemistry, Center for Physical Sciences and Technology, A. Goštauto 9, LT-01108, Vilnius, Lithuania
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9
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Proniewicz E, Skołuba D, Ignatjev I, Niaura G, Sobolewski D, Prahl A, Proniewicz LM. Influence of applied potential on bradykinin adsorption onto Ag, Au, and Cu electrodes. JOURNAL OF RAMAN SPECTROSCOPY 2013; 44:655-664. [DOI: 10.1002/jrs.4246] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2024]
Abstract
Surface‐enhanced Raman scattering, electrochemistry, and generalized two‐dimensional correlation analysis (G2DCA) methods were used to characterize bradykinin (BK), a hormone which is known to be involved in small‐cell and non‐small‐cell lung carcinoma and prostate cancer. BK was deposited onto Ag, Au, and Cu electrode surfaces under different applied electrode potentials (−1.000 V to 0.200 V) in aqueous solutions. Based on the analysis of the enhancement, the broadening, and the shifts in the wavenumbers of individual bands, specific conclusions were drawn regarding the peptide geometry and changes in this geometry that occurred when the electrode type and applied electrode potential were varied. Briefly, BK deposited onto the Ag, Au, and Cu electrode surfaces showed bands that were due to the vibrations of moieties in contact with or in close proximity to the electrode surfaces and were thus located on the same side of the polypeptide backbone. These moieties included the Phe, Arg, and Pro residues. The findings for adsorbed BK were fully supported by G2DCA, which also allowed us to determine the order in which changes occurred when the electrode potential was changed. In addition, it was found that at negative electrode potentials, the Phe rings and methylene groups interact with Ag electrode surface. No such interaction was observed for Au and Cu electrodes. Copyright © 2013 John Wiley & Sons, Ltd.
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Affiliation(s)
- Edyta Proniewicz
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Dominika Skołuba
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Ilja Ignatjev
- Institute of Chemistry Center for Physical Sciences and Technology A. Gostauto 9 LT‐01108 Vilnius Lithuania
| | - Gediminas Niaura
- Institute of Chemistry Center for Physical Sciences and Technology A. Gostauto 9 LT‐01108 Vilnius Lithuania
| | - Dariusz Sobolewski
- Faculty of Chemistry University of Gdansk Sobieskiego 18 80‐952 Gdansk Poland
| | - Adam Prahl
- Faculty of Chemistry University of Gdansk Sobieskiego 18 80‐952 Gdansk Poland
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Ji W, Spegazzini N, Kitahama Y, Chen Y, Zhao B, Ozaki Y. pH-Response Mechanism of p-Aminobenzenethiol on Ag Nanoparticles Revealed By Two-Dimensional Correlation Surface-Enhanced Raman Scattering Spectroscopy. J Phys Chem Lett 2012; 3:3204-3209. [PMID: 26296030 DOI: 10.1021/jz301428e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The existence of pH-dependent surface-enhanced Raman scattering (SERS) of p-aminobenzenethiol (PATP) on Ag nanoparticles has been confirmed by numerous studies, but its mechanism still remains to be clarified. Discussion of the mechanism is at a standstill because of the lack of a systematic investigation of the process behind the pH-induced variation of the PATP behavior. Two-dimensional correlation spectroscopy is one of the most powerful and versatile spectral analysis methods for investigating perturbation-induced variations in dynamic data. Herein, we have analyzed the pH-dependent behavior of PATP using a static buffer solution with pH ranging from 3.0 to 2.0. The order of the variations in the different vibrational intensities was carefully investigated based on 2D correlation SERS spectroscopy. These results have demonstrated that the very first step of the pH-response process involves protonation of the amine group. The pH-response mechanism revealed is an important new component to our understanding of the origin of the b2-type bands of PATP.
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Affiliation(s)
- Wei Ji
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China
| | - Nicolas Spegazzini
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Yasutaka Kitahama
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Yujing Chen
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Bing Zhao
- †State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China
| | - Yukihiro Ozaki
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
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Podstawka-Proniewicz E, Piergies N, Skołuba D, Kafarski P, Kim Y, Proniewicz LM. Vibrational Characterization of l-Leucine Phosphonate Analogues: FT-IR, FT-Raman, and SERS Spectroscopy Studies and DFT Calculations. J Phys Chem A 2011; 115:11067-78. [PMID: 21888349 DOI: 10.1021/jp207101m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Natalia Piergies
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
| | - Dominika Skołuba
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
| | - Paweł Kafarski
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw Technical University, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - Younkyoo Kim
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do, 449-791, Korea
| | - Leonard M. Proniewicz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
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Ignatjev I, Podstawka-Proniewicz E, Niaura G, Lombardi JR, Proniewicz LM. Potential Induced Changes in Neuromedin B Adsorption on Ag, Au, and Cu Electrodes Monitored by Surface-Enhanced Raman Scattering. J Phys Chem B 2011; 115:10525-36. [DOI: 10.1021/jp2026863] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ilja Ignatjev
- Institute of Chemistry, Center for Physical Sciences and Technology, A. Gostauto 9, LT-01108, Vilnius, Lithuania
| | | | - Gediminas Niaura
- Institute of Chemistry, Center for Physical Sciences and Technology, A. Gostauto 9, LT-01108, Vilnius, Lithuania
| | - John R. Lombardi
- Department of Chemistry, City College of New York, 160 Convent Avenue, New York, New York 10031, United States
| | - Leonard M. Proniewicz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
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Podstawka-Proniewicz E, Kudelski A, Kim Y, Proniewicz LM. Structure and Binding of Specifically Mutated Neurotensin Fragments on a Silver Substrate: Vibrational Studies. J Phys Chem B 2011; 115:7097-108. [DOI: 10.1021/jp201316n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Andrzej Kudelski
- Faculty of Chemistry, University of Warsaw, ul. L. Pasteura 1, 02-093 Warsaw, Poland
| | - Younkyoo Kim
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 449-791, Korea
| | - Leonard M. Proniewicz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
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Podstawka-Proniewicz E, Kudelski A, Kim Y, Proniewicz LM. Structure of monolayers formed from neurotensin and its single-site mutants: vibrational spectroscopic studies. J Phys Chem B 2011; 115:6709-21. [PMID: 21542591 DOI: 10.1021/jp200805f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The human, pig, and frog neurotensins and four single-site mutants of human neurotensin (NT), having the following modifications, [Gln(4)]NT, [Trp(11)]NT, [D-Trp(11)]NT, and [D-Tyr(11)]NT, were immobilized onto an electrochemically roughened silver electrode surface in an aqueous solution. The orientation of adsorbed molecules was determined from surface-enhanced Raman scattering (SERS) measurements. A comparison was made between these structures to determine how the change upon the mutation of the neurotensin structure influences its adsorption properties. The SERS patterns were correlated with the contribution of the structural components of the aforementioned peptides to the ability to interact with the NTR1 G-protein receptor. Briefly, the SERS spectra revealed that the substitution of native amino acids in investigated peptides influenced slightly their adsorption state on an electrochemically roughened silver surface. Thus, human, pig, and frog neurotensins and [Gln(4)]NT and [D-Tyr(11)]NT tended to adsorb to the surface via the tyrosine ring, the oxygen atom of the deprotonated phenol group of Tyr(11), and the -CH(2)- unit(s), most probably of Tyr(11), Arg(9), and/or Leu(13). The observed changes in the enhancement of the deprotonated Tyr residue SERS signals indicated a further parallel orientation of a phenol-O bond with regard to the silver surface normal for pig NT, [Gln(4)]NT, and [D-Tyr(11)]NT, whereas the orientation was slightly tilted for human and frog NT. In the case of [Trp(11)]NT and [D-Trp(11)]NT, the formation of a peptide/Ag complex was confirmed by strong SERS bands involving the phenyl co-ring of Trp(11)/d-Trp(11) and -CH(2)- vibrations and the tilted and flat orientations of the two compounds with respect to the surface substrate. The spectral features were accompanied by a SERS signal caused by vibrations of the carboxyl group of C-terminal Leu(13) and the guanidine group of Arg(9). Reported changes in SERS spectra of L and D isomers were fully supported by generalized two-dimensional correlation analysis. Additionally, a combination of mutation-labeling and vibrational spectroscopy (Fourier-transform Raman and absorption infrared) was used to investigate the possible peptide conformations and environments of the tyrosine residues.
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Xie W, Qiu P, Mao C. Bio-imaging, detection and analysis by using nanostructures as SERS substrates. ACTA ACUST UNITED AC 2011; 21:5190-5202. [PMID: 21625344 DOI: 10.1039/c0jm03301d] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Surface-enhanced Raman scattering (SERS) is a phenomenon that occurs on nanoscale-roughed metallic surface. The magnitude of the Raman scattering signal can be greatly enhanced when the scatterer is placed in the very close vicinity of the surface, which enables this phenomenon to be a highly sensitive analytical technique. SERS inherits the general strongpoint of conventional Raman spectroscopy and overcomes the inherently small cross section problem of a Raman scattering. It is a sensitive and nondestructive spectroscopic method for biological samples, and can be exploited either for the delivery of molecular structural information or for the detection of trace levels of analytes. Therefore, SERS has long been regarded as a powerful tool in biomedical research. Metallic nanostructure plays a key role in all the biomedical applications of SERS because the enhanced Raman signal can only be obtained on the surface of a finely divided substrate. This review focuses on progress made in the use of SERS as an analytical technique in bio-imaging, analysis and detection. Recent progress in the fabrication of SERS active nanostructures is also highlighted.
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Affiliation(s)
- Wei Xie
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, OK, 73019, USA
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Podstawka-Proniewicz E, Kosior M, Kim Y, Rolka K, Proniewicz LM. Nociceptin and its natural and specifically-modified fragments: Structural studies. Biopolymers 2010; 93:1039-54. [PMID: 20629016 DOI: 10.1002/bip.21516] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The vibrational structures of Nociceptin (FQ), its short bioactive fragments, and specifically-modified [Tyr¹]FQ (1-6), [His¹]FQ (1-6), and [His(1,4)]FQ (1-6) fragments were characterized. We showed that in the solid state, all of the aforementioned peptides except FQ adopt mainly turn and disordered secondary structures with a small contribution from an antiparallel β-sheet conformation. FQ (1-11), FQ (7-17) [His¹]FQ (1-6), and [His(1,4)]FQ (1-6) have an α-helical backbone arrangement that could also slightly influence their secondary structure. The adsorption behavior of these peptides on a colloidal silver surface in an aqueous solution (pH = ∼8.3) was investigated by means of surface-enhanced Raman scattering (SERS). All of the peptides, excluding FQ (7-17), chemisorbed on the colloidal silver surfaces through a Phe⁴ residue, which for FQ, FQ (1-11), FQ (1-6), [Tyr¹]FQ (1-6), and [His¹]FQ (1-6) lies almost flat on this surface, while for FQ (1-13) and FQ (1-13)NH₂ adopts a slightly tilted orientation with respect to the surface. The Tyr¹ residue in [Tyr¹]FQ (1-6) does not interact with the colloidal silver surface, suggesting that the Tyr¹ and Phe⁴ side chains are located on the opposite sides of the peptide backbone, which can be also true for His¹ and Phe⁴ in [His¹]FQ (1-6). The lone pair of electrons on the oxygen atom of the ionized carbonyl group of FQ (1-13) and FQ (7-17) appears to be coordinated to the colloidal silver nanoparticles, whereas in the case of the remaining peptides, it only assists in the adsorption process, similar to the --NH⁴ group. We also showed that upon adsorption, the secondary structure of these peptides is altered.
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Podstawka-Proniewicz E, Niaura G, Proniewicz LM. Neuromedin C: Potential-Dependent Surface-Enhanced Raman Spectra in the Far-Red Spectral Region on Silver, Gold, and Copper Surfaces. J Phys Chem B 2010; 114:5117-24. [DOI: 10.1021/jp910575f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Edyta Podstawka-Proniewicz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland, Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Mokslininkų 12, LT-08662 Vilnius, Lithuania
| | - Gediminas Niaura
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland, Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Mokslininkų 12, LT-08662 Vilnius, Lithuania
| | - Leonard M. Proniewicz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland, Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Mokslininkų 12, LT-08662 Vilnius, Lithuania
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Podstawka E, Niaura G, Proniewicz LM. Potential-dependent studies on the interaction between phenylalanine-substituted bombesin fragments and roughened Ag, Au, and Cu electrode surfaces. J Phys Chem B 2010; 114:1010-29. [PMID: 20025214 DOI: 10.1021/jp909268c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we report systematic surface-enhanced Raman spectroscopy (SERS) and generalized two-dimensional correlation analysis (G2DCA) studies of the structures of five specifically modified phenylalanine-substituted C-terminal bombesin 6-14 fragments (BN(6-14)). The fragments studied have all been tested as chemotherapeutic agents in cancer therapy, and they form amino acid sequences in bombesin: cyclo[d-Phe(6),His(7),Leu(14)]BN(6-14), [D-Phe(6),Leu-NHEt(13),des-Met(14)]BN(6-14), [D-Phe(6),Leu(13)-((R))-p-Cl-Phe(14)]BN(6-14), [D-Phe(6),beta-Ala(11),Phe(13),Nle(14)]BN(6-14), and [D-Tyr(6),beta-Ala(11),Phe(13),Nle(14)]BN(6-14). We adsorbed these fragments onto roughened Ag, Au, and Cu electrode surfaces, using a potential range from -1.200 to 0.400 V, at physiological pH. We compared the adsorption mechanism of each fragment on these substrates, as well any changes observed with varying electrode potential, to determine the relationship between adsorption strength and geometry of each of the peptides wherever it was possible. For example, we showed that none of these fragments directly interact with the Ag, Au, and Cu surfaces via residues of Phe (phenylalanine) and Trp(8) (L-tryptophane at position 8 of the BN amino acid sequence) or by an amide bond, due to a very small shift in wavenumber of their characteristic vibrations. Specific interactions were recognized from the broadening, wavenumber shift, and increase in intensity of the W18 Trp(8) mode near 759 cm(-1) and decrease in nu(12) vibration frequency of the Phe residue. In general, more intense SERS bands were observed due to the Phe ring, compared with the Trp(8) ring, which suggested a preferential adsorption of phenylalanine over tryptophane. For [D-Tyr(6),beta-Ala(11),Phe(13),Nle(14)]BN(6-14), the data also suggest some interaction of a D-Tyr(6) residue (D-tyrosine at position 6). Finally, only slight rearrangements of these moieties on the substrates are observed with changes in electrode potential.
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Affiliation(s)
- Edyta Podstawka
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland.
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