Electrochemical immunoanalysis of cardiac myoglobin


1. Institute of Biomedical Chemistry, Russian Academy of Medical Sciences
Type: Experimental/clinical study
DOI: 10.18097/PBMC20105606758      UDK: 61:577.1      PubMed Id: 21395078
Year: 2010 vol: 56  issue:6  pages: 758-768
Abstract: Method targeting the direct monitoring of myoglobin based on analysis of electrochemical parameters of modified electrodes were proposed. Method of direct detection is based on interaction of myoglobin with anti-myoglobin with subsequent electrochemical registration of hemeprotien. Myocardial infarction biomarker myoglobin was quantified at biological level using screen printed electrodes modified with gold nanoparticles stabilized with didodecyldimethylammonium bromide (DDAB) and antibodies. Proposed method did not require signal enhancement and amplification and also labeled secondary antibodies. Electro analysis has high specificity and sensitivity. Myoglobin -antibodies interaction was studied also with electrochemical impedance spectroscopy. Sensor has low detection limit and broad diapason of working concentrations (17.8 ng/ml - 1780 ng/ml; 1 nM - 10 nM). Method based on gold nanoparticles detection on the surface of electrodes was treated for myoglobin identification. AuNP worked as an electrochemical sensing platform: the oxidation of gold surface (resulted in gold oxide formation) upon polarization served as a basis for analytical response. The difference of cathodic peak area and peak high of gold oxide reduction in the case of electrodes with antibodies and electrodes with antibodies - myoglobin complex, was registered.
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Reference: Shumyantseva V.V., Bulko T.V., Vagin M.Yu., Suprun E.V., Archakov A.I., Electrochemical immunoanalysis of cardiac myoglobin, Biomeditsinskaya khimiya, 2010, vol: 56(6), 758-768.
This paper is also available as the English translation:10.1134/S1990750810030042