Pontinha ADR, Sparapani S, Neidle S, Oliveira-Brett AM. Triazole-acridine conjugates: redox mechanisms and in situ electrochemical evaluation of interaction with double-stranded DNA.
Bioelectrochemistry 2012;
89:50-6. [PMID:
23059201 DOI:
10.1016/j.bioelechem.2012.08.005]
[Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 08/08/2012] [Accepted: 08/09/2012] [Indexed: 01/09/2023]
Abstract
Redox mechanisms and in situ electrochemical interaction with double-stranded DNA were investigated using a DNA-electrochemical biosensor for two disubstituted triazole-linked acridine compounds (GL15 and GL7), previously reporting as quadruplex DNA-binding molecules. The redox properties of GL15 and GL7 involve a complex, pH-dependent, adsorption-controlled irreversible process and were investigated using cyclic, differential pulse, and square wave voltammetry at a glassy carbon electrode. The interaction between duplex DNA and GL15 or GL7 was investigated in incubated solutions using dsDNA-, poly[G]-, and poly[A]-electrochemical biosensors. It was demonstrated that the interaction is time-dependent, both GL15 and GL7 interacting with dsDNA, causing condensation of dsDNA morphological structure but not oxidative damage.
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