Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles

A series of 2-phenylbenzothiazole derivatives and their corresponding organometallic ruthenium(II) and osmium(II) complexes were synthesized, designed to exploit both, the attributes of the half-sandwich transition metal scaffold and the bioactivity spectrum of the applied 2-phenylbenzothiazoles. Al...

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Main Authors: Stephan Mokesch, Klaudia Cseh, Heiko Geisler, Michaela Hejl, Matthias H. M. Klose, Alexander Roller, Samuel M. Meier-Menches, Michael A. Jakupec, Wolfgang Kandioller, Bernhard K. Keppler
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-04-01
Series:Frontiers in Chemistry
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fchem.2020.00209/full
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author Stephan Mokesch
Klaudia Cseh
Heiko Geisler
Michaela Hejl
Matthias H. M. Klose
Alexander Roller
Samuel M. Meier-Menches
Samuel M. Meier-Menches
Michael A. Jakupec
Michael A. Jakupec
Wolfgang Kandioller
Wolfgang Kandioller
Bernhard K. Keppler
Bernhard K. Keppler
author_facet Stephan Mokesch
Klaudia Cseh
Heiko Geisler
Michaela Hejl
Matthias H. M. Klose
Alexander Roller
Samuel M. Meier-Menches
Samuel M. Meier-Menches
Michael A. Jakupec
Michael A. Jakupec
Wolfgang Kandioller
Wolfgang Kandioller
Bernhard K. Keppler
Bernhard K. Keppler
author_sort Stephan Mokesch
collection DOAJ
description A series of 2-phenylbenzothiazole derivatives and their corresponding organometallic ruthenium(II) and osmium(II) complexes were synthesized, designed to exploit both, the attributes of the half-sandwich transition metal scaffold and the bioactivity spectrum of the applied 2-phenylbenzothiazoles. All synthesized compounds were characterized via standard analytical methods. The obtained organometallics showed antiproliferative activity in the low μM range and are thus at least an order of magnitude more potent than the free ligands. ESI-MS measurements showed that the examined compounds were stable in aqueous solution over 48 h. Additionally, their binding preferences to small biomolecules, their cellular accumulation and capacity of inducing apoptosis/necrosis were investigated. Based on the fluorescence properties of the selected ligand and the corresponding ruthenium complex, their subcellular distribution was studied by fluorescence microscopy, revealing a high degree of colocalization with acidic organelles of cancer cells.
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spelling doaj.art-68571d82c92d4b019aea10e20ae511762022-12-22T01:44:50ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-04-01810.3389/fchem.2020.00209530174Investigations on the Anticancer Potential of Benzothiazole-Based MetallacyclesStephan Mokesch0Klaudia Cseh1Heiko Geisler2Michaela Hejl3Matthias H. M. Klose4Alexander Roller5Samuel M. Meier-Menches6Samuel M. Meier-Menches7Michael A. Jakupec8Michael A. Jakupec9Wolfgang Kandioller10Wolfgang Kandioller11Bernhard K. Keppler12Bernhard K. Keppler13Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaResearch Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, AustriaDepartment of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaResearch Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaResearch Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, AustriaInstitute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, AustriaResearch Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, AustriaA series of 2-phenylbenzothiazole derivatives and their corresponding organometallic ruthenium(II) and osmium(II) complexes were synthesized, designed to exploit both, the attributes of the half-sandwich transition metal scaffold and the bioactivity spectrum of the applied 2-phenylbenzothiazoles. All synthesized compounds were characterized via standard analytical methods. The obtained organometallics showed antiproliferative activity in the low μM range and are thus at least an order of magnitude more potent than the free ligands. ESI-MS measurements showed that the examined compounds were stable in aqueous solution over 48 h. Additionally, their binding preferences to small biomolecules, their cellular accumulation and capacity of inducing apoptosis/necrosis were investigated. Based on the fluorescence properties of the selected ligand and the corresponding ruthenium complex, their subcellular distribution was studied by fluorescence microscopy, revealing a high degree of colocalization with acidic organelles of cancer cells.https://www.frontiersin.org/article/10.3389/fchem.2020.00209/fullmetallacyclesanticancerbenzothiazolesruthenium complexesosmium complexes
spellingShingle Stephan Mokesch
Klaudia Cseh
Heiko Geisler
Michaela Hejl
Matthias H. M. Klose
Alexander Roller
Samuel M. Meier-Menches
Samuel M. Meier-Menches
Michael A. Jakupec
Michael A. Jakupec
Wolfgang Kandioller
Wolfgang Kandioller
Bernhard K. Keppler
Bernhard K. Keppler
Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
Frontiers in Chemistry
metallacycles
anticancer
benzothiazoles
ruthenium complexes
osmium complexes
title Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
title_full Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
title_fullStr Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
title_full_unstemmed Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
title_short Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles
title_sort investigations on the anticancer potential of benzothiazole based metallacycles
topic metallacycles
anticancer
benzothiazoles
ruthenium complexes
osmium complexes
url https://www.frontiersin.org/article/10.3389/fchem.2020.00209/full
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