Abstract:Single-walled carbon nanotubes (SWCNT) modified disposable graphite electrodes (SWCNT-PGEs) were investigated in our study for the improved electrochemical monitoring of nucleic acids and biomolecular interactions based on the higher signal enhancement comparison to bare PGEs. The surface morphologies of bare PGE and SWCNT-PGE were firstly explored using scanning electron microscopy (SEM) analysis. The easy surface modification of disposable graphite electrodes with carbon nanotubes was performed by passive ad… Show more
“…The investigations at chemistry side based on DNA-drug interactions may provide new compounds, that could be tested for an effect on a biochemical target, and also used as promising hybridization indicator in combination with DNA hybridization biosensors based on nanomaterials, which will further become DNA microchip systems [6,12,13,15].…”
a b s t r a c tThe biomolecular interactions of platinum derivatives widely used as anticancer drugs: cisdiamminedichloroplatinum(II) and oxaliplatin with calf thymus double-stranded DNA were studied using differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) in combination with single-walled carbon nanotubes modified graphite electrode (SWCNTs-GE) and unmodified graphite electrode (bare GE). The performance of these biomolecular interactions were explored at the electrode surface by monitoring the changes at guanine oxidation signal in terms of optimum interaction times by comparing the results of SWCNTs-GE with bare one. The features of these electrochemical sensors based on carbon nanotubes for monitoring of biomolecular interactions were discussed and compared with the earlier conventional ones.
“…The investigations at chemistry side based on DNA-drug interactions may provide new compounds, that could be tested for an effect on a biochemical target, and also used as promising hybridization indicator in combination with DNA hybridization biosensors based on nanomaterials, which will further become DNA microchip systems [6,12,13,15].…”
a b s t r a c tThe biomolecular interactions of platinum derivatives widely used as anticancer drugs: cisdiamminedichloroplatinum(II) and oxaliplatin with calf thymus double-stranded DNA were studied using differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) in combination with single-walled carbon nanotubes modified graphite electrode (SWCNTs-GE) and unmodified graphite electrode (bare GE). The performance of these biomolecular interactions were explored at the electrode surface by monitoring the changes at guanine oxidation signal in terms of optimum interaction times by comparing the results of SWCNTs-GE with bare one. The features of these electrochemical sensors based on carbon nanotubes for monitoring of biomolecular interactions were discussed and compared with the earlier conventional ones.
“…14,16,37 The success of the PGE over existing carbon electrodes is because it is commercially available, practical and cost-effective in use, and has better reproducibility. The electrochemical method presented here is experimentally convenient and sensitive, requiring only small amounts of DNA or compounds.…”
Four different Mannich base derivatives containing an aromatic/heteroaromatic propanone structure (C1 (3-(dimethylamino)-1-(thiophen-2-yl)propan-1-one hydrochloride); C2 (3-morpholino-1-(pyridin-3-yl)propan-1-one hy-propan-1-one hydrochloride)) were earlier synthesized and characterized with 1 H NMR, 13 C NMR, MS, and elemental analysis. The interaction of these compounds with fish sperm double stranded DNA (fs-dsDNA) was investigated by using differential pulse voltammetry (DPV) in connection with a disposable pencil graphite electrode (PGE). After the interaction procedure, there was a meaningful decrease in the oxidation signal of the electroactive DNA base guanine due to possible intercalation and/or alkylation mechanism between these Mannich base derivatives and DNA. The features of this electrochemical assay were discussed in comparison to previous reports related to DNA targeted agents/drug candidates in the literature.
“…Nanostructures, such as nanowires, nanotubes and nanoparticles, offer new and sometimes unique opportunities that can be exploited for sensing [57,58]. Specifically, the modification of transducers with carbon nanotubes has recently attracted considerable attention in the field of electro-analytical chemistry.…”
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