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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Development of a plasma panel test for detection of human myocardial proteins by capillary immunoassay.

A chemiluminescence immunoassay for the detection of four heart marker proteins: myoglobin, creatine kinase mb [CKmb], troponin I [TnI], and fatty acid-binding protein [FABP], was designed. The immunoassay was based on enzyme-linked immunosorbent assay [ELISA] and antibodies immobilized in glass capillaries pre-treated with 3-aminopropyltriethoxysilane. The protein bound to the antibody was detected by using an anti-protein-horseradish peroxidase [HRP] conjugate. The reaction of the HRP with luminal and hydrogen peroxide-based substrate generated the chemiluminescence and a photodiode detector was used to measure the light intensity. The same assay protocol was used to detect all four proteins. Ultrasound waves were used to improve the silanization of glass and the antibody immobilization process. The optimization of the duration and intensity of the ultrasound was performed for the myoglobin assay. Ultrasound improved the silanization procedure and the capillaries gave an approximately 2.5 times greater ELISA response. Ultrasound also improved the sensitivity by approximately 100% when monoclonal antibody was immobilized on a glass capillary. Calibration curves corresponding to analyte concentrations ranging from 2.4 to 2400ng/ml in plasma samples were recorded. The detection limits were in the region of 1.2 myoglobin, 0.6 CKmb, 5.6 TnI, and 4ng/ml FABP in plasma with a coefficient of variation of 3-9.9%.[1]

References

  1. Development of a plasma panel test for detection of human myocardial proteins by capillary immunoassay. Torabi, F., Mobini Far, H.R., Danielsson, B., Khayyami, M. Biosensors & bioelectronics (2007) [Pubmed]
 
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