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Fabrication of porcine DNA biosensor based on ruthenium bipyridine complex


Citation

Abdullah Halid, Nurul Izni and Zakariah, Emma Izzati and Lee, Yook Heng and Abd Karim, Nurul Huda and Ahmad, Haslina and Hasbullah, Siti Aishah (2016) Fabrication of porcine DNA biosensor based on ruthenium bipyridine complex. Malaysian Journal of Analytical Sciences, 20 (5). pp. 1020-1032. ISSN 1394-2506

Abstract / Synopsis

Electrochemical DNA biosensor for detection of porcine oligonucleotides based on ruthenium (II) as label redox complex has been developed. The system of biosensor is based on the modified screen printed carbon electrode (SPE) with goldnanoparticles (AuNPs) as transducer immobilized with poly(n-butylacrylate-N-acryloxysuccinimide) microsphere and porcine DNA probe sequences was attached onto it via the covalent bond. The ruthenium(II) complex, [Ru(bpy)2PIP]2+ PIP = 2-phenylimidazo[4,5-f[1,10-phenanthroline] intercalator has been been used to determine prcine DNA. The biosensor was measured and optimized by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The interaction of [Ru(bpy)2PIP]2+ with various DNA with different sequences, i) single stranded probe DNA, ii) after hybridization with its complementary DNA and iii) after hybridization with mismatch complementary DNA were studied. The results indicated that the interaction of [Ru(bpy)2PIP]2+ with hybridized complementary DNA gave the highest response. Thus, development of porcine DNA biosensor and influences of many factors such as [Ru(bpy)2PIP]2+ complex and DNA probe concentration, DNA probe immobilization and hybridization time, pH, ionic strength, buffer concentration and temperatures were also studied to evaluate the performance of biosensor. The concentration of [Ru(bpy)2PIP]2+ complex and DNA probe were found to be optimal at 50 µM and 2 µM, respectively. The optimal time for DNA probe immobilization and hybridization were 7 hours and 60 minutes, accordingly. The optimal condition of pH, ionic strength, buffer concentration and temperatures were at pH 7.0, 1.0 M NaCl, 0.05 M of Na-phosphate buffer and 25 °C, respectively. The linear range of different concentration complementary DNA was within the range between 1.0 x 10-13 M to 1.0 x 10-8 M. This study was first reported the used of [Ru(bpy)2PIP]2+ for detection of porcine oligonucleotides.


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Additional Metadata

Item Type: Article
Subject: Biosensor; Porcine DNA; Ruthenium bypyridine complex
Divisions: Faculty of Science
DOI Number: https://doi.org/10.17576/mjas-2016-2005-06
Publisher: Malaysian Analytical Sciences Society
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 09 Mar 2018 02:43
Last Modified: 09 Mar 2018 02:43
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.17576/mjas-2016-2005-06
URI: http://psasir.upm.edu.my/id/eprint/54261
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