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dc.contributor.authorHaleel, A
dc.contributor.authorMahendiran, D
dc.contributor.authorVeena, V
dc.contributor.authorSakthivel, N
dc.contributor.authorRahiman, A Kalilur
dc.date.accessioned2021-09-09T00:00:40Z
dc.date.available2021-09-09T00:00:40Z
dc.date.issued2016
dc.identifier.issn0928-4931
dc.identifier.doi10.1016/j.msec.2016.05.120
dc.identifier.urihttp://hdl.handle.net/10072/407807
dc.description.abstractA series of heteroleptic mononuclear copper(II) complexes of the type [Cu(L1-3)(diimine)]ClO4 (1-6) containing three tetrazolo[1,5-a]pyrimidine core ligands, ethyl 5-methyl-7-(2-hydroxyphenyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylate (HL1), ethyl 5-methyl-7-(4-diethylamino-2-hydroxyphenyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylate (HL2) or ethyl 5-methyl-7-(2-hydroxy-4-nitrophenyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylate (HL3), and two diimine coligands, 2,2′-bipyridyl (bpy) or 1,10-phenanthroline (phen) have been synthesized and characterized by spectral methods. The geometry of complexes have been determined with the help of electronic absorption and EPR splitting patterns, which suggest four coordinated square planar geometry around copper(II) ion. The lowering of HOMO-LUMO band gap value of complex 4 implies its higher biological activity compared to other complexes. Antioxidant studies revealed that the complexes possess considerable radical scavenging potency against DPPH. The binding studies of the complexes with calf thymus DNA (CT-DNA) revealed groove mode of binding, which was further supported by docking simulation. The complexes 3 and 4 strongly inhibit the topoisomerase I, and also strongly interact with VEGFR2 kinase receptor via π-π, σ-π and hydrogen bonding interaction. Gel electrophoresis experiments demonstrated the ability of the complexes to cleave plasmid DNA in the absence of activators. In vitro cytotoxic activities of the complexes were examined on three cancerous cell lines such as human lung (A549), cervical (HeLa) and colon (HCT-15), and two normal cells such as human embryonic kidney (HEK) and peripheral blood mononuclear cells (PBMCs). The live cell and fluorescent imaging of cancer cells were observed with acridine orange/ethidium bromide staining assay. All encouraging chemical and biological findings indicate that the complex 4 is a suitable candidate for drug target.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofpagefrom366
dc.relation.ispartofpageto382
dc.relation.ispartofjournalMaterials Science and Engineering: C
dc.relation.ispartofvolume68
dc.subject.fieldofresearchBiomedical engineering
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchcode4003
dc.subject.fieldofresearchcode4016
dc.subject.keywordsScience & Technology
dc.subject.keywordsTechnology
dc.subject.keywordsMaterials Science, Biomaterials
dc.subject.keywordsMaterials Science
dc.subject.keywordsTetrazolo[1,5-a]pyrimidines
dc.titleAntioxidant, DNA interaction, VEGFR2 kinase, topoisomerase I and in vitro cytotoxic activities of heteroleptic copper(II) complexes of tetrazolo[1,5-a]pyrimidines and diimines
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationHaleel, A; Mahendiran, D; Veena, V; Sakthivel, N; Rahiman, AK, Antioxidant, DNA interaction, VEGFR2 kinase, topoisomerase I and in vitro cytotoxic activities of heteroleptic copper(II) complexes of tetrazolo[1,5-a]pyrimidines and diimines, Materials Science and Engineering: C, 2016, 68, pp. 366-382
dcterms.dateAccepted2016-05-27
dc.date.updated2021-09-08T23:59:00Z
gro.hasfulltextNo Full Text
gro.griffith.authorDharmasivam, Mahendiran


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