1
|
Gonzalez-Garcia MC, Herrero-Foncubierta P, Castro S, Resa S, Alvarez-Pez JM, Miguel D, Cuerva JM, Garcia-Fernandez E, Orte A. Coupled Excited-State Dynamics in N-Substituted 2-Methoxy-9-Acridones. Front Chem 2019; 7:129. [PMID: 30915328 PMCID: PMC6422897 DOI: 10.3389/fchem.2019.00129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 02/18/2019] [Indexed: 01/12/2023] Open
Abstract
Fluorophores of the acridone family have been widely employed in many applications, such as DNA sequencing, the detection of biomolecules, and the monitoring of enzymatic systems, as well as being the bases of intracellular sensors and even antitumoral agents. They have been widely used in fluorescence imaging due to their excellent photophysical properties, in terms of quantum yield and stability. However, frequently, the fluorescence emission data from acridones are not easily interpretable due to complex excited-state dynamics. The formation of π-stacking aggregates and excimers and excited-state proton transfer (ESPT) reactions usually result in emission features that are dependent on the experimental conditions. Therefore, an in-depth understanding of the dynamics involved in the excited-state transients of these dyes is mandatory for their appropriate application. Herein, we synthesized and fully characterized different 2-methoxy-9-acridone dyes. Their transient fluorescence emission spectra exhibited a complex dynamic behavior that can be linked to several excited-state reactions. We performed a thorough study of the excited-state dynamics of these dyes by means of time-resolved fluorimetry supported by computational calculations. All this allowed us to establish a multistate kinetic scheme, involving an ESPT reaction coupled to an excimer formation process. We have unraveled the rich dynamics behind this complex behavior, which provides a better understanding of the excited states of these dyes.
Collapse
Affiliation(s)
- M Carmen Gonzalez-Garcia
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Pilar Herrero-Foncubierta
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain.,Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Silvia Castro
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Sandra Resa
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Jose M Alvarez-Pez
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Delia Miguel
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Juan M Cuerva
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Emilio Garcia-Fernandez
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Angel Orte
- Departamento de Fisicoquimica, Facultad de Farmacia, Unidad de Excelencia en Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| |
Collapse
|
2
|
Bečka M, Vilková M, Salem O, Kašpárková J, Brabec V, Kožurková M. 3-[(E)-(acridin-9'-ylmethylidene)amino]-1-substituted thioureas and their biological activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 180:234-241. [PMID: 28315620 DOI: 10.1016/j.saa.2017.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/08/2017] [Accepted: 03/04/2017] [Indexed: 06/06/2023]
Abstract
This paper describes the synthesis of a novel series of acridine thiosemicarbazones through a two-step reaction between various isothiocyanates and hydrazine followed by treatment with acridin-9-carbaldehyde. The properties of this series of seven new derivatives are studied using NMR and biochemical techniques, and the DNA-binding properties of the compounds are determined using spectrophotometric studies (UV-vis absorption, fluorescence, and circular/linear dichroism) and viscometry. The binding constants K are estimated as being in the range of 2.2 to 7.8×104M-1 and the percentage of hypochromism was found to be 22.11-49.75% (from UV-vis spectral titration). Electrophoretic experiments prove that the novel compounds demonstrate moderate inhibitory effects against Topo I activity at a concentration of 60×10-6M.
Collapse
Affiliation(s)
- Michal Bečka
- Department of Organic Chemistry, Institute of Chemistry, Faculty of Science, P.J.Šafárik University, Moyzesova 11, Košice, Slovak Republic
| | - Mária Vilková
- Department of Organic Chemistry, Institute of Chemistry, Faculty of Science, P.J.Šafárik University, Moyzesova 11, Košice, Slovak Republic
| | - Othman Salem
- Department of Biochemistry, Institute of Chemistry, Faculty of Science, P.J.Šafárik University, Moyzesova 11, Košice, Slovak Republic
| | - Jana Kašpárková
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Viktor Brabec
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Mária Kožurková
- Department of Biochemistry, Institute of Chemistry, Faculty of Science, P.J.Šafárik University, Moyzesova 11, Košice, Slovak Republic; Biomedical Research Center, University Hospital Hradec Kralove, Sokolovska 581, Hradec Kralove, Czech Republic.
| |
Collapse
|
3
|
Janockova J, Gulasova Z, Musilek K, Kuca K, Kozurkova M. Novel cholinesterase modulators and their ability to interact with DNA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 115:364-369. [PMID: 23851179 DOI: 10.1016/j.saa.2013.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/23/2013] [Accepted: 06/04/2013] [Indexed: 06/02/2023]
Abstract
In the present work, an interaction of four cholinesterase modulators (1-4) with calf thymus DNA was studied via spectroscopic techniques (UV-Vis, fluorescent spectroscopy and circular dichroism). From UV-Vis spectroscopic analysis, the binding constants for DNA-pyridinium oximes complexes were calculated (K=3.5×10(4) to 1.4×10(5)M(-1)). All these measurements indicated that the compounds behave as effective DNA-interacting agents. Electrophoretic techniques proved that ligand 2 inhibited topoisomerase I at a concentration 5μM.
Collapse
Affiliation(s)
- Jana Janockova
- Institute of Chemistry, Department of Biochemistry, P.J. Šafárik University, Faculty of Science, Moyzesova 11, 04001 Kosice, Slovak Republic
| | | | | | | | | |
Collapse
|
4
|
Klika KD, Budovská M, Kutschy P. NMR spectral enantioresolution of spirobrassinin and 1-methoxyspirobrassinin enantiomers using (S)-(−)-ethyl lactate and modeling of spirobrassinin self-association for rationalization of its self-induced diastereomeric anisochromism (SIDA) and enantiomer self-disproportionation on achiral-phase chromatography (ESDAC) phenomena. J Fluor Chem 2010. [DOI: 10.1016/j.jfluchem.2009.10.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Enantiodifferentiation of phytoalexin spirobrassinin derivatives using the chiral solvating agent (R)-(+)-1,1′-bi-2-naphthol in conjunction with molecular modeling. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.03.035] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
6
|
Imrich J, Bedlovičová Z, Kristian P, Danihel I, Böhm S, Sabolová D, Kožurková M, Paulíková H, D. Klika K. Novel Carbohydrazide and Hydrazone Biomarkers Based on 9-Substituted Acridine and Anthracene Fluorogens. HETEROCYCLES 2010. [DOI: 10.3987/com-09-s(s)83] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
7
|
Imrich J, Tomaščiková J, Danihel I, Kristian P, Böhm S, D. Klika K. Selective Formation of 5- or 6-Membered Rings, 1,3-Thiazolidin-4-one vs. 1,3-Thiazin-4-one, from Acridine Thiosemicarbazides by the Use of Ethyne Acid Esters. HETEROCYCLES 2010. [DOI: 10.3987/com-09-s(s)56] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
8
|
Computational study to assign structure, tautomerism, E/Z and s-cis/s-trans isomerism, π-delocalization, partial aromaticity, and the ring size of 1,3-thiazolidin-4-ones and 1,3-thiazin-4-ones formed from thiosemicarbazides. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.09.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|