Glover, C., Fairbanks, S., Robertson, C.C. et al. (3 more authors) (2025) An optical ratiometric approach using enantiopure luminescent metal complexes indicates changes in the average quadruplex DNA content as primary cells undergo multiple divisions. Dalton Transactions. ISSN 1477-9226
Abstract
The three stereoisomers of a previously reported dinuclear ruthenium(II) complex have been quantitatively separated using cation-exchange chromatography and the individual crystal structures of the racemic pair are reported. Cell-based studies on the three stereoisomers disclosed differences in the rate of uptake of the two chiral forms of the rac diastereoisomer with the ΛΛ-enantiomer being taken up noticeably more rapidly than the ΔΔ-form. Cell viability studies reveal that the three cations show identical cytotoxicity over 24 hours, but over more extended exposure periods, the meso-ΔΛ stereoisomer becomes slightly less active. More significantly, microscopy studies revealed that although both isomers display a near infra-red “light-switch” effect associated with binding to duplex DNA on binding to chromatin in live MCF7 and L5178-R cells, only the ΛΛ enantiomer displays a distinctive, blue-shifted component associated with binding to quadruplex DNA. An analysis of the ratio of “quadruplex emission” compared to “duplex emission” for the ΛΛ-enantiomer indicated that there was a decrease in the average quadruplex DNA content within live primary cells as they undergo multiple cell divisions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence (https://creativecommons.org/licenses/by-nc/3.0/). |
Keywords: | Inorganic Chemistry; Chemical Sciences; Genetics |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences The University of Sheffield > Faculty of Engineering (Sheffield) > School of Chemical, Materials and Biological Engineering |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 Mar 2025 10:43 |
Last Modified: | 25 Mar 2025 10:43 |
Status: | Published online |
Publisher: | Royal Society of Chemistry (RSC) |
Refereed: | Yes |
Identification Number: | 10.1039/d4dt03238a |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:224796 |