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Exploring the cytotoxic activity of new phenanthroline salicylaldimine Zn(II) complexes

dc.contributor.authorMatos, Cristina
dc.contributor.authorAddis, Yemataw
dc.contributor.authorNunes, Patrique
dc.contributor.authorBarroso, Sónia
dc.contributor.authorAlho, Irina
dc.contributor.authorMartins, Marta
dc.contributor.authorMatos, António P.A.
dc.contributor.authorMarques, Fernanda
dc.contributor.authorCavaco, Isabel
dc.contributor.authorPessoa, João
dc.contributor.authorCorreia, Isabel
dc.date.accessioned2022-01-11T16:49:46Z
dc.date.available2022-01-11T16:49:46Z
dc.date.issued2019
dc.description© 2019 Elsevier Inc. All rights reserved.pt_PT
dc.description.abstractZinc(II) complexes bearing N-salicylideneglycinate (Sal-Gly) and 1,10-phenanthroline (phen) or phenanthroline derivatives [NN = 5-chloro-1,10-phenanthroline, 5-amine-1,10-phenanthroline (amphen), 4,7-diphenyl-1,10-phenanthroline (Bphen) and 5,6-epoxy-5,6-dihydro-1,10-phenanthroline] are synthesized. Complexes formulated as [Zn(NN)2(H2O)2]2+(NN = phen and amphen), are also prepared. The cytotoxicity of the compounds is evaluated towards a panel of human cancer cells: ovarian (A2780), breast (MCF7) and cervical (HeLa), as well as non-tumoral V79 fibroblasts. All compounds display higher cytotoxicity than cisplatin (IC50 = 22.5 ± 5.0 μM) towards ovarian cells, showing IC50values in the low micromolar range. Overall, all compounds show higher selectivity for the A2780 cells than for the non-tumoral cells and higher selectivity indexes (IC50(V79)/IC50(A2780) than cisplatin. [Zn(Sal-Gly)(NN)(H2O)] complexes induce caspase-dependent apoptosis in A2780 cells, except [Zn(Sal-Gly)(Bphen)(H2O)], one of the most cytotoxic of the series. The cellular uptake in the ovarian cells analyzed by Inductively Coupled Plasma mass spectrometry indicates different Zn distribution profiles. Transmission electronic microscopy shows mitochondria alterations and apoptotic features consistent with caspase activation; cells incubated with [Zn(Sal-Gly)(amphen)(H2O)] present additional nuclear membrane alterations in agreement with significant association with the nucleus. The increase of reactive oxygen species and lipid peroxidation forms could be related to apoptosis induction. [Zn(NN)2(H2O)2]2+complexes have high ability to bind DNA through intercalation/groove binding, and circular dichroism data suggests that the main type of species that interact with DNA is [Zn(NN)]2+. Studies varying the % of fetal bovine serum (1-15%) in cell media show that albumin binding decreases the complex activity, indicating that distinct speciation of Zn- and phen-containing species in cell media may affect the cytotoxicity.pt_PT
dc.description.sponsorshipThis work was supported by Fundação para a Ciência e Tecnologia (FCT) (projects UID/QUI/00100/2013, UID/MULTI/04349/2013, UID/BIO/04565/2013, RECI/QEQ-QIN/0189/2012, RECI/QEQ-MED/0330/2012), Programa Operacional Regional de Lisboa (LISBOA-01-0145-FEDER-007317). Isabel Correia thanks program Investigador FCT (IF/00841/2012), Cristina Matos, Patrique Nunes and Sónia Barroso thank FCT for grants SFRH/BD/101214/2014, SFRH/BD/108743/2015 and SFRH/BPD/7394/2010, respectively.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationJ Inorg Biochem. 2019 Sep;198:110727pt_PT
dc.identifier.doi10.1016/j.jinorgbio.2019.110727pt_PT
dc.identifier.eissn1873-3344
dc.identifier.issn0162-0134
dc.identifier.urihttp://hdl.handle.net/10451/50778
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationLISBOA-01-0145-FEDER-007317pt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/journal/journal-of-inorganic-biochemistrypt_PT
dc.subjectAnticancer activitypt_PT
dc.subjectLipid peroxidespt_PT
dc.subjectPolypyridyl ligandspt_PT
dc.subjectROSpt_PT
dc.subjectSalicylaldiminespt_PT
dc.subjectZinc(II) complexespt_PT
dc.titleExploring the cytotoxic activity of new phenanthroline salicylaldimine Zn(II) complexespt_PT
dc.typejournal article
dspace.entity.typePublication
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FBIO%2F04565%2F2013/PT
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/RECI%2FQEQ-MED%2F0330%2F2012/PT
oaire.citation.titleJournal of Inorganic Biochemistrypt_PT
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rcaap.typearticlept_PT
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