PMID- 32453464 OWN - NLM STAT- MEDLINE DCOM- 20210226 LR - 20210226 IS - 1521-3765 (Electronic) IS - 0947-6539 (Linking) VI - 26 IP - 60 DP - 2020 Oct 27 TI - DNA-Targeted NO Release Photoregulated by Green Light. PG - 13627-13633 LID - 10.1002/chem.202001538 [doi] AB - A novel molecular hybrid has been designed and synthesized in which acridine orange (AO) is covalently linked to an N-nitrosoaniline derivative through an alkyl spacer. Photoexcitation of the AO antenna with the highly biocompatible green light results in intense fluorescence emission and triggers NO detachment from the N-nitroso appendage via an intramolecular electron transfer. The presence of the AO moiety encourages the binding with DNA through both external and partially intercalative fashions, depending on the DNA:molecular hybrid molar ratio. Importantly, this dual-mode binding interaction with the biopolymer does not preclude the NO photoreleasing performances of the molecular hybrid, permitting NO to be photogenerated nearby DNA with an efficiency similar to that of the free molecule. These properties make the presented compound an intriguing candidate for fundamental and potential applicative research studies where NO delivery in the DNA proximity precisely regulated by harmless green light is required. CI - (c) 2020 Wiley-VCH GmbH. FAU - Parisi, Cristina AU - Parisi C AD - PhotoChemLab, Department of Drug Sciences, University of Catania, 95125, Catania, Italy. FAU - Fraix, Aurore AU - Fraix A AD - PhotoChemLab, Department of Drug Sciences, University of Catania, 95125, Catania, Italy. FAU - Guglielmo, Stefano AU - Guglielmo S AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Spyrakis, Francesca AU - Spyrakis F AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Rolando, Barbara AU - Rolando B AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Lazzarato, Loretta AU - Lazzarato L AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Fruttero, Roberta AU - Fruttero R AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Gasco, Alberto AU - Gasco A AD - Department of Science and Drug Technology, University of Torino, Via Pietro Giuria 9, 10125, Torino, Italy. FAU - Sortino, Salvatore AU - Sortino S AUID- ORCID: 0000-0002-2086-1276 AD - PhotoChemLab, Department of Drug Sciences, University of Catania, 95125, Catania, Italy. LA - eng GR - IG-19859/Associazione Italiana per la Ricerca sul Cancro/ PT - Journal Article DEP - 20200928 PL - Germany TA - Chemistry JT - Chemistry (Weinheim an der Bergstrasse, Germany) JID - 9513783 RN - 0 (Fluorescent Dyes) RN - 0 (Nitrosamines) RN - 31C4KY9ESH (Nitric Oxide) RN - 9007-49-2 (DNA) RN - F30N4O6XVV (Acridine Orange) SB - IM MH - *Acridine Orange MH - *DNA MH - Fluorescent Dyes MH - Light MH - *Nitric Oxide MH - Nitrosamines MH - Photochemical Processes MH - Spectrometry, Fluorescence OTO - NOTNLM OT - DNA OT - fluorescence OT - light OT - nitric oxide OT - photochemistry EDAT- 2020/05/27 06:00 MHDA- 2021/02/27 06:00 CRDT- 2020/05/27 06:00 PHST- 2020/03/30 00:00 [received] PHST- 2020/05/20 00:00 [revised] PHST- 2020/05/27 06:00 [pubmed] PHST- 2021/02/27 06:00 [medline] PHST- 2020/05/27 06:00 [entrez] AID - 10.1002/chem.202001538 [doi] PST - ppublish SO - Chemistry. 2020 Oct 27;26(60):13627-13633. doi: 10.1002/chem.202001538. Epub 2020 Sep 28.