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Article

Bis-Pyrene Photo-Switch Open- and Closed-Form Differently Bind to ds-DNA, ds-RNA and Serum Albumin and Reveal Light-Induced Bioactivity

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Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
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Division of Molecular Biology, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
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Author to whom correspondence should be addressed.
Academic Editor: Luca Agnelli
Int. J. Mol. Sci. 2021, 22(9), 4916; https://doi.org/10.3390/ijms22094916
Received: 7 April 2021 / Revised: 27 April 2021 / Accepted: 30 April 2021 / Published: 6 May 2021
(This article belongs to the Collection Feature Papers in Molecular Genetics and Genomics)
Newly designed and synthesized diarylethene (DAE) derivatives with aliphatic amine sidearms and one with two pyrenes, revealed excellent photo-switching property of central DAE core in MeOH and water. The only exception was bis-pyrene analogue, its DAE core very readily photochemically closed, but reversible opening completely hampered by aromatic stacking interaction of pyrene(s) with cyclic DAE. In this process, pyrene fluorescence showed to be a reliable monitoring method, an open form characterized by strong emission at 480 nm (typical for pyrene-aggregate), while closed form emitted weakly at 400 nm (typical for pyrene-DAE quenching). Only open DAE-bis-pyrene form interacted measurably with ds-DNA/RNA by flexible insertion in polynucleotide grooves, while self-stacked closed form did not bind to DNA/RNA. For the same steric reasons, flexible open DAE-bis-pyrene form was bound to at least three different binding sites at bovine serum albumin (BSA), while rigid, self-stacked closed form interacted dominantly with only one BSA site. Preliminary screening of antiproliferative activity against human lung carcinoma cell line A549 revealed that all DAE-derivatives are non-toxic. However, bis-pyrene analogue efficiently entered cells and located in the cytoplasm, whereby irradiation by light (315–400 nm) resulted in a strong, photo-induced cytotoxic effect, typical for pyrene-related singlet oxygen species production. View Full-Text
Keywords: photo-switch; diarylethene; pyrene; DNA; RNA binding; BSA binding; cell uptake; cytotoxicity photo-switch; diarylethene; pyrene; DNA; RNA binding; BSA binding; cell uptake; cytotoxicity
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MDPI and ACS Style

Orehovec, I.; Matković, M.; Pehar, I.; Majhen, D.; Piantanida, I. Bis-Pyrene Photo-Switch Open- and Closed-Form Differently Bind to ds-DNA, ds-RNA and Serum Albumin and Reveal Light-Induced Bioactivity. Int. J. Mol. Sci. 2021, 22, 4916. https://doi.org/10.3390/ijms22094916

AMA Style

Orehovec I, Matković M, Pehar I, Majhen D, Piantanida I. Bis-Pyrene Photo-Switch Open- and Closed-Form Differently Bind to ds-DNA, ds-RNA and Serum Albumin and Reveal Light-Induced Bioactivity. International Journal of Molecular Sciences. 2021; 22(9):4916. https://doi.org/10.3390/ijms22094916

Chicago/Turabian Style

Orehovec, Iva, Marija Matković, Isabela Pehar, Dragomira Majhen, and Ivo Piantanida. 2021. "Bis-Pyrene Photo-Switch Open- and Closed-Form Differently Bind to ds-DNA, ds-RNA and Serum Albumin and Reveal Light-Induced Bioactivity" International Journal of Molecular Sciences 22, no. 9: 4916. https://doi.org/10.3390/ijms22094916

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