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Kashin AS, Tatikolov AS. Spectral and fluorescent study of the interaction of anionic cyanine dyes with serum albumins. HIGH ENERGY CHEMISTRY 2009. [DOI: 10.1134/s0018143909060113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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52
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Chang E, Congdon EE, Honson NS, Duff KE, Kuret J. Structure-activity relationship of cyanine tau aggregation inhibitors. J Med Chem 2009; 52:3539-47. [PMID: 19432420 DOI: 10.1021/jm900116d] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A structure-activity relationship for symmetrical cyanine inhibitors of human tau aggregation was elaborated using a filter trap assay. Antagonist activity depended on cyanine heterocycle, polymethine bridge length, and the nature of meso- and N-substituents. One potent member of the series, 3,3'-diethyl-9-methylthiacarbocyanine iodide (compound 11), retained submicromolar potency and had calculated physical properties consistent with blood-brain barrier and cell membrane penetration. Exposure of organotypic slices prepared from JNPL3 transgenic mice (which express human tau harboring the aggregation prone P301L tauopathy mutation) to compound 11 for one week revealed a biphasic dose response relationship. Low nanomolar concentrations decreased insoluble tau aggregates to half those observed in slices treated with vehicle alone. In contrast, high concentrations (> or =300 nM) augmented tau aggregation and produced abnormalities in tissue tubulin levels. These data suggest that certain symmetrical carbocyanine dyes can modulate tau aggregation in the slice biological model at concentrations well below those associated with toxicity.
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Affiliation(s)
- Edward Chang
- Center for Molecular Neurobiology, Department of Molecular and Cellular Biochemistry, The Ohio State University College of Medicine, Columbus, OH 43210, USA
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53
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Correlation between the content of albumin and carotenoids in human vitreous body during prenatal development. Bull Exp Biol Med 2008; 144:681-3. [PMID: 18683495 DOI: 10.1007/s10517-007-0404-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The dynamics of the content albumin and carotenoids in human fetal vitreous body during weeks 16-31 of gestation was studied. The maximum values of total albumin (1.42 mg) and carotenoids (276 ng) during the studied period were recorded on weeks 20-22. Albumin concentration peaked during week 17 (2.11x10(-4) mol/liter) and carotenoids during weeks 16-17 (about 0.045x10(-4) mol/liter) of prenatal development. By week 31, the concentrations and total content of albumin and carotenoids in the vitreous body decreased. The physiological role of the studied components of the vitreous body for prenatal development of human eye is discussed.
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54
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Translational and rotational motions of albumin sensed by a non-covalent associated porphyrin under physiological and acidic conditions: a fluorescence correlation spectroscopy and time resolved anisotropy study. J Fluoresc 2008; 18:601-10. [PMID: 18264814 DOI: 10.1007/s10895-008-0329-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Accepted: 01/22/2008] [Indexed: 10/22/2022]
Abstract
The interaction between a free-base, anionic water-soluble porphyrin, TSPP, and the drug carrier protein, bovine serum albumin (BSA) has been studied by time-resolved fluorescence anisotropy (TRFA) and fluorescence correlation spectroscopy (FCS) at two different pH-values. Both rotational correlation times and translational diffusion times of the fluorescent species indicate that TSPP binding to albumin induces very little conformational changes in the protein under physiological conditions. By contrast, at low pH, a bi-exponential decay is obtained where a short rotational correlation time (phi (int) = 1.2 ns) is obtained, which is likely associated to wobbling movement of the porphyrin in the protein binding site. These physical changes are corroborated by circular dichroism (CD) data which show a 37% loss in the protein helicity upon acidification of the medium. In the presence of excess porphyrin formation of porphyrin J-aggregates is induced, which can be detected by time-resolved fluorescence with short characteristic times. This is also reflected in FCS data by an increase in molecular brightness together with a decrease in the number of fluorescent molecules passing through the detection volume of the sample.
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ZHANG YZ, YANG QF, DU HY, TANG YL, XU GZ, YAN WP. Spectroscopic Investigation on the Interaction of a Cyanine Dye with Serum Albumins. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890076] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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56
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Zhou Q, Xiang J, Tang Y, Liao J, Yu C, Zhang H, Li L, Yang Y, Xu G. Investigation on the interaction between a heterocyclic aminal derivative, SBDC, and human serum albumin. Colloids Surf B Biointerfaces 2008; 61:75-80. [PMID: 17768036 DOI: 10.1016/j.colsurfb.2007.07.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2007] [Revised: 07/14/2007] [Accepted: 07/17/2007] [Indexed: 11/18/2022]
Abstract
The interaction between a novel promising drug (spiro[(2R,3R,4S)-4-benzyloxy-2,3-isopropylidene-dioxy-1-oxa-cyclopentane-5,5'-(2-benzoylmethylene-1,3-diaza-cyclohexane)] (SBDC)) and human serum albumin (HSA) under physiological conditions has been investigated by using fluorescence, absorption, and circular dichroism (CD) spectroscopic techniques in combination with protein-ligand docking study. It was observed that SBDC has a strong ability to quench the intrinsic fluorescence of HSA through a static quenching procedure. The association constants of SBDC with HSA were determined at different temperatures based on fluorescence quenching results. The negative DeltaH and positive DeltaS values in case of SBDC-HSA complex showed that apart from an initial hydrophobic association, both van der Waals interactions and hydrogen bonding play a vital role in the binding of SBDC to HSA. The quantitative analysis data of CD spectra showed that the binding of SBDC to HSA induced conformational changes in HSA and the alpha-helix of 52.1% in free HSA increased to 55.7% in HSA-SBDC complex. The distance between donor (HSA) and acceptor (SBDC) was obtained according to the Förster's theory of non-radiation energy transfer. Data obtained by spectroscopic techniques and protein-ligand docking study suggested that SBDC binds to residues located in subdomain IIA of HSA.
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Affiliation(s)
- Qiuju Zhou
- Beijing National Laboratory for Molecular Sciences (BNLMS), Center for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
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57
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Slavnova TD, Görner H, Chibisov AK. J-Aggregation of Anionic Ethyl meso-Thiacarbocyanine Dyes Induced by Binding to Proteins. J Phys Chem B 2007; 111:10023-31. [PMID: 17672494 DOI: 10.1021/jp072503y] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effects of ribonuclease A (RNase), lysozyme, trypsin, and bovine serum albumin (BSA) on the J-aggregation behavior of 3,3'-bis[sulfopropyl]-5-methoxy-4',5'-benzo-9-ethylthiacarbocyanine (1), 3,3'-bis[sulfopropyl]-4,5,4',5'-dibenzo-9-ethylthiacarbocyanine (2), and 3,3'-bis[sulfopropyl]-5,5'-dimethoxy-9-ethylthiacarbocyanine (3) were studied in aqueous solution. The formation of J-aggregates at pH 6 is induced by RNase for 1-3, by lysozyme for 1 and 2, and by trypsin for 2. The formation of J-aggregates correlates with decay of the dimers and is supported by induced circular dichroism spectra. The concentration of J-aggregates for lysozyme/1 increases with an increase in the protein/dye concentration ratio, reaches a plateau, and then gradually decreases. J-aggregates are characterized by relatively weak fluorescence; e.g., Phi(f) = 0.01 for lysozyme/1, and by a small Stokes shift of 6-8 nm, indicating almost resonance fluorescence. J-aggregation proceeds in the range of seconds to minutes with sigmoidal type kinetic curves for trypsin/2 and nonsigmoidal kinetics in the other cases. The presence of BSA, in contrast to RNase, lysozyme, and trypsin, results in deaggregation of dimers of 1-3 and formation of bound monomers and exhibits intense fluorescence from the trans-monomer; e.g., Phi(f) = 0.22 for BSA/1. Generally, the binding of 1-3 to the proteins is a cooperative process, where the number of binding sites changes from n = 15 for lysozyme/1 to n = 6 for trypsin/2 and n = 0.3 and 1 for BSA/3.
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Affiliation(s)
- Tatyana D Slavnova
- Center of Photochemistry, Russian Academy of Sciences, 119421 Moscow, Russia
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58
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Zhang Y, Du H, Tang Y, Xu G, Yan W. Spectroscopic investigation on the interaction of J-aggregate with human serum albumin. Biophys Chem 2007; 128:197-203. [PMID: 17482339 DOI: 10.1016/j.bpc.2007.04.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2007] [Revised: 04/12/2007] [Accepted: 04/14/2007] [Indexed: 11/27/2022]
Abstract
The interactions of three cyanine dyes, which exhibit different meso substituent in polymethine chain, with human serum albumin (HSA) have been investigated by the means of absorption, fluorescence and circular dichroism (CD) spectra. In phosphate buffer solution (PBS), the mentioned dyes exist not as isolated monomers but rather in the formation of J-aggregation. In the presence of HSA, the absorption and fluorescence emission spectra indicated that the J-aggregation was decomposed to monomer because of the strong affinity between dye molecules and HSA. Besides the association of cyanine dyes with HSA, binding to HSA gave rise to the J-aggregation CD signals. The meso substituent in the polymethine plays an important role in the interaction of HSA and the J-aggregation. Spectral studies showed that the dye bound with HSA in a 1:1 formation. The apparent constant (K(a)) value was roughly identified by analysis of the corresponding fluorescence data at various HSA concentrations. The higher affinity of the molecule with meso phenyl towards HSA with respect to molecules with meso ethyl or methyl can be attributed to the arrangement of molecules in J-aggregation and the hydrophobic force between the molecules and HSA.
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Affiliation(s)
- Yazhou Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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59
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60
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Tatikolov AS, Costa SMB. Energy Transfer and Fluorescence Quenching in Complexes of Polymethine Dyes with Human Serum Albumin¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2004.tb00079.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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61
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Pronkin PG, Tatikolov AS, Kuzmin VA. Spectral and kinetic investigation of interaction of 3,3′-diethyl-9-chlorothiacarbocyanine perchlorate with DNA. HIGH ENERGY CHEMISTRY 2007. [DOI: 10.1134/s0018143907020087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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62
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63
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Zhang Y, Xiang J, Tang Y, Xu G, Yan W. Chiral Transformation of Achiral J-aggregates of a Cyanine Dye Templated by Human Serum Albumin. Chemphyschem 2007; 8:224-6. [PMID: 17177227 DOI: 10.1002/cphc.200600548] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yazhou Zhang
- Beijing National Laboratory for Molecular Sciences, Center for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, P. R. China
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64
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Panova IG, Sharova NP, Dmitrieva SB, Poltavtseva RA, Sukhikh GT, Tatikolov AS. Use of a cyanine dye as a probe for albumin and collagen in the extracellular matrix. Anal Biochem 2007; 361:183-9. [PMID: 17207765 DOI: 10.1016/j.ab.2006.11.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2006] [Revised: 11/14/2006] [Accepted: 11/17/2006] [Indexed: 11/19/2022]
Abstract
The aim of this work was to develop a quick method for analysis of macromolecules of the extracellular matrix. Of great interest are soluble components of the extracellular matrix, in particular, carrier proteins, whose variation dynamics can characterize the studied tissue in its development, adult stage, and aging. We suggest the method of analysis of the extracellular matrix to reveal the presence of albumin and collagen by using an anionic cyanine dye as a spectral and fluorescence probe. The method was applied for the analysis of the human vitreous body in the course of its development. Albumin was detected by the appearance of the trans monomer absorption and fluorescence bands in the dye spectra, and collagen was detected by the absorption and fluorescence bands of J aggregates. Hyaluronic acid present in the vitreous body does not interfere with the results of the analysis. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Western blot analysis confirmed the presence of albumin in the vitreous body. We suppose that albumin as a protein carrying biologically active macromolecules plays an important role in the processes of differentiation and functional establishment of ocular tissues in the course of their prenatal development.
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Affiliation(s)
- Ina G Panova
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, 119991 Moscow, Russia.
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65
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Pronkin PG, Tatikolov AS, Sklyarenko VI, Kuz’min VA. Quenching of the triplet state of meso-substituted thiacarbocyanine dyes by nitroxyl radicals, iodide ions, and oxygen in solutions and in complexes with DNA. HIGH ENERGY CHEMISTRY 2006. [DOI: 10.1134/s0018143906060087] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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66
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Shvedova LA, Tatikolov AS, Krasnaya ZA. Spectral and fluorescent properties and prototropic equilibrium of (bis-θ,θ′-dimethylaminopolyenyl)diketones. HIGH ENERGY CHEMISTRY 2006. [DOI: 10.1134/s0018143906060075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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67
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Pronkin PG, Tatikolov AS, Sklyarenko VI, Kuz’min VA. Photochemical properties of meso-substituted thiacarbocyanine dyes in solutions and in complexes with DNA. HIGH ENERGY CHEMISTRY 2006. [DOI: 10.1134/s0018143906040096] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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68
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Zanini GP, Avena MJ, Fiol S, Arce F. Effects of pH and electrolyte concentration on the binding between a humic acid and an oxazine dye. CHEMOSPHERE 2006; 63:430-9. [PMID: 16307779 DOI: 10.1016/j.chemosphere.2005.08.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2005] [Revised: 08/12/2005] [Accepted: 08/17/2005] [Indexed: 05/05/2023]
Abstract
The binding between an oxazine dye and a humic acid was studied in aqueous solutions in the pH range 4-10 and in the supporting electrolyte (KCl) range 0.001-0.1M. A rather simple spectrophotometric method was developed to construct binding isotherms under conditions were traditional centrifugation or filtration methods fail. The use of this method is possible because humic acid molecules have the ability of changing the spectrum of dye molecules, and this ability is used to quantify the isotherms. All binding isotherms have a Langmuirian shape. The amount of bound dye is strongly dependent on the ionic strength and less dependent on the pH of the solution. The binding is rather strong and mainly driven by non-electrostatic forces. Whereas the Langmuir binding constant is independent of the pH and electrolyte concentration, the number of assessable sites in humic acid for binding oxazine increases by increasing pH and decreasing electrolyte concentration. These results can be directly related to the flexibility of humic acid molecules, which can swell at high pH and low ionic strength, increasing consequently the availability of binding sites. The results also indicate that humic substances may strongly affect the mobility and fate of dyes and related pollutants in the environment.
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Affiliation(s)
- Graciela P Zanini
- CERZOS, CONICET-UNS, Departamento de Agronomía, Universidad Nacional del Sur, San Andrés 850, Altos de Palihue, 8000, Bahía Blanca, Argentina.
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69
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A Spectroscopic Study on the Interaction of Polymethine Dyes with Collagens. HIGH ENERGY CHEMISTRY 2005. [DOI: 10.1007/s10733-005-0047-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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70
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Homem-de-Mello P, Mennucci B, Tomasi J, da Silva ABF. The effects of solvation in the theoretical spectra of cationic dyes. Theor Chem Acc 2005. [DOI: 10.1007/s00214-005-0668-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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71
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Panova IG, Tatikolov AS. Finding of albumin in the vitreous body of the human eye with the use of a cyanine dye as a probe. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2005; 402:183-5. [PMID: 16121938 DOI: 10.1007/s10630-005-0082-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Affiliation(s)
- I G Panova
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119991 Russia
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Patonay G, Kim JS, Kodagahally R, Strekowski L. Spectroscopic study of a novel bis(heptamethine cyanine) dye and its interaction with human serum albumin. APPLIED SPECTROSCOPY 2005; 59:682-90. [PMID: 15969815 DOI: 10.1366/0003702053945976] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A newly synthesized near-infrared (NIR) bis(heptamethine cyanine) dye 7 was evaluated for its utility as a non-covalent label for proteins. This dye forms inter- and intramolecular H-aggregates in polar solvents, even at very low concentrations. The intramolecular dimeric form of the dye can be described as a clam-shell complex with two interacting hydrophobic carbocyanine moieties. In this intramolecular H-aggregate, the chromophore has a low extinction coefficient and low fluorescence quantum yield. In aqueous solution, in the absence of human serum albumin (HSA), dye 7 has characteristic absorption bands at 792 and 435 nm, and its fluorescent emission is significantly diminished in comparison to that in methanol or when compared to its monomeric equivalent 5. Dye 7 seems to be more advantageous than its monomeric counterpart 5 as a non-covalent label for biomolecules. Upon addition of HSA, the H and D bands are decreased and the monomeric band is increased, with concomitant increase in fluorescence intensity, suggesting that clam-shell H-aggregates open up in the complex with HSA. The binding stoichiometry is 1:1. The main advantage of this dimeric dye as a non-covalent label is that the free dye has negligible fluorescence.
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Affiliation(s)
- Gabor Patonay
- Department of Chemistry, University Plaza, Georgia State University, Atlanta, Georgia 30303, USA
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