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Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents

We report here the synthesis and structural characterization of novel cationic (phenothiazinyl)vinyl-pyridinium (PVP) dyes, together with optical (absorption/emission) properties and their potential applicability as fluorescent labels. Convective heating, ultrasound irradiation and mechanochemical s...

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Autores principales: Stoean, Bianca, Rugina, Dumitrita, Focsan, Monica, Craciun, Ana-Maria, Nistor, Mǎdǎlina, Lovasz, Tamas, Turza, Alexandru, Porumb, Ioan-Dan, Gál, Emese, Cristea, Castelia, Silaghi-Dumitrescu, Luminita, Astilean, Simion, Gaina, Luiza Ioana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7999001/
https://www.ncbi.nlm.nih.gov/pubmed/33804193
http://dx.doi.org/10.3390/ijms22062985
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author Stoean, Bianca
Rugina, Dumitrita
Focsan, Monica
Craciun, Ana-Maria
Nistor, Mǎdǎlina
Lovasz, Tamas
Turza, Alexandru
Porumb, Ioan-Dan
Gál, Emese
Cristea, Castelia
Silaghi-Dumitrescu, Luminita
Astilean, Simion
Gaina, Luiza Ioana
author_facet Stoean, Bianca
Rugina, Dumitrita
Focsan, Monica
Craciun, Ana-Maria
Nistor, Mǎdǎlina
Lovasz, Tamas
Turza, Alexandru
Porumb, Ioan-Dan
Gál, Emese
Cristea, Castelia
Silaghi-Dumitrescu, Luminita
Astilean, Simion
Gaina, Luiza Ioana
author_sort Stoean, Bianca
collection PubMed
description We report here the synthesis and structural characterization of novel cationic (phenothiazinyl)vinyl-pyridinium (PVP) dyes, together with optical (absorption/emission) properties and their potential applicability as fluorescent labels. Convective heating, ultrasound irradiation and mechanochemical synthesis were considered as alternative synthetic methodologies proficient for overcoming drawbacks such as long reaction time, nonsatisfactory yields or solvent requirements in the synthesis of novel dye (E)-1-(3-chloropropyl)-4-(2-(10-methyl-10H-phenothiazin-3-yl)vinyl)pyridin-1-ium bromide 3d and its N-alkyl-2-methylpyridinium precursor 1c. The trans geometry of the newly synthesized (E)-4-(2-(7-bromo-10-ethyl-10H-phenothiazin-3-yl)vinyl)-1-methylpyridin-1-ium iodide 3b and (E)-1-methyl-4-(2-(10-methyl-10H-phenothiazin-3-yl)vinyl)pyridin-1-ium tetrafluoroborate 3a′ was confirmed by single crystal X-ray diffraction. A negative solvatochromism of the dyes in polar solvents was highlighted by UV-Vis spectroscopy and explanatory insights were supported by molecular modeling which suggested a better stabilization of the lowest unoccupied molecular orbitals (LUMO). The photostability of the dye 3b was investigated by irradiation at 365 nm in different solvents, while the steady-state and time-resolved fluorescence properties of dye 3b and 3a′ in solid state were evaluated under one-photon excitation at 485 nm. The in vitro cytotoxicity of the new PVP dyes on B16-F10 melanoma cells was evaluated by WST-1 assay, while their intracellular localization was assessed by epi-fluorescence conventional microscopy imaging as well as one- and two-photon excited confocal fluorescence lifetime imaging microscopy (FLIM). PVP dyes displayed low cytotoxicity, good internalization inside melanoma cells and intense fluorescence emission inside the B16-F10 murine melanoma cells, making them suitable staining agents for imaging applications.
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spelling pubmed-79990012021-03-28 Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents Stoean, Bianca Rugina, Dumitrita Focsan, Monica Craciun, Ana-Maria Nistor, Mǎdǎlina Lovasz, Tamas Turza, Alexandru Porumb, Ioan-Dan Gál, Emese Cristea, Castelia Silaghi-Dumitrescu, Luminita Astilean, Simion Gaina, Luiza Ioana Int J Mol Sci Article We report here the synthesis and structural characterization of novel cationic (phenothiazinyl)vinyl-pyridinium (PVP) dyes, together with optical (absorption/emission) properties and their potential applicability as fluorescent labels. Convective heating, ultrasound irradiation and mechanochemical synthesis were considered as alternative synthetic methodologies proficient for overcoming drawbacks such as long reaction time, nonsatisfactory yields or solvent requirements in the synthesis of novel dye (E)-1-(3-chloropropyl)-4-(2-(10-methyl-10H-phenothiazin-3-yl)vinyl)pyridin-1-ium bromide 3d and its N-alkyl-2-methylpyridinium precursor 1c. The trans geometry of the newly synthesized (E)-4-(2-(7-bromo-10-ethyl-10H-phenothiazin-3-yl)vinyl)-1-methylpyridin-1-ium iodide 3b and (E)-1-methyl-4-(2-(10-methyl-10H-phenothiazin-3-yl)vinyl)pyridin-1-ium tetrafluoroborate 3a′ was confirmed by single crystal X-ray diffraction. A negative solvatochromism of the dyes in polar solvents was highlighted by UV-Vis spectroscopy and explanatory insights were supported by molecular modeling which suggested a better stabilization of the lowest unoccupied molecular orbitals (LUMO). The photostability of the dye 3b was investigated by irradiation at 365 nm in different solvents, while the steady-state and time-resolved fluorescence properties of dye 3b and 3a′ in solid state were evaluated under one-photon excitation at 485 nm. The in vitro cytotoxicity of the new PVP dyes on B16-F10 melanoma cells was evaluated by WST-1 assay, while their intracellular localization was assessed by epi-fluorescence conventional microscopy imaging as well as one- and two-photon excited confocal fluorescence lifetime imaging microscopy (FLIM). PVP dyes displayed low cytotoxicity, good internalization inside melanoma cells and intense fluorescence emission inside the B16-F10 murine melanoma cells, making them suitable staining agents for imaging applications. MDPI 2021-03-15 /pmc/articles/PMC7999001/ /pubmed/33804193 http://dx.doi.org/10.3390/ijms22062985 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Stoean, Bianca
Rugina, Dumitrita
Focsan, Monica
Craciun, Ana-Maria
Nistor, Mǎdǎlina
Lovasz, Tamas
Turza, Alexandru
Porumb, Ioan-Dan
Gál, Emese
Cristea, Castelia
Silaghi-Dumitrescu, Luminita
Astilean, Simion
Gaina, Luiza Ioana
Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title_full Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title_fullStr Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title_full_unstemmed Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title_short Novel (Phenothiazinyl)Vinyl-Pyridinium Dyes and Their Potential Applications as Cellular Staining Agents
title_sort novel (phenothiazinyl)vinyl-pyridinium dyes and their potential applications as cellular staining agents
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7999001/
https://www.ncbi.nlm.nih.gov/pubmed/33804193
http://dx.doi.org/10.3390/ijms22062985
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