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Clinical Chemistry 41: 1693-1697, 1995;
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Clinical Chemistry, Vol 41, 1693-1697, Copyright © 1995 by American Association for Clinical Chemistry

Application of a low-light imaging device and chemiluminescent substrates for quantitative detection of viral DNA in hybridization reactions

S Girotti, M Musiani, P Pasini, E Ferri, G Gallinella, ML Zerbini, A Roda, G Gentilomi and S Venturoli
Institute of Chemical Sciences, University of Bologna, Italy.

In this quantitative dot-blot hybridization assay for detecting B19 parvovirus DNA, we used three different chemiluminescent substrates [adamantyl-1,2-dioxetane phenyl phosphates (PPD and the new PPD-Plus) and the chloro-5-substituted adamantyl-1,2-dioxetane phosphate (CSPD) plus Emerald enhancer] and a high-performance, low-intensity-light imaging luminograph apparatus. The hybridization test uses digoxigenin- labeled DNA probes, which are immunoenzymatically revealed by anti- digoxigenin Fab fragments conjugated with alkaline phosphatase. All the detection systems with the various chemiluminescent substrates gave sensitive and reproducible results for calibrators and positive or negative reference clinical samples, with high reproducibility (CV 4- 17%). The signal was measured after 45 min of incubation. The luminograph apparatus could detect 10 fg of homologous DNA with the PPD- Plus substrate, whereas the detection limit with the CSPD and PPD substrates was 20 fg and 20-50 fg, respectively. Analysis of 26 samples with the three substrates showed good sensitivity and specificity for viral detection.


The following articles in journals at HighWire Press have cited this article:


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F. Fini, G. Gallinella, S. Girotti, M. Zerbini, and M. Musiani
Development of a Chemiluminescence Competitive PCR for the Detection and Quantification of Parvovirus B19 DNA Using a Microplate Luminometer
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M. Musiani, M. Zerbini, S. Venturoli, G. Gentilomi, G. Gallinella, E. Manaresi, M. La Placa, A. D'Antuono, A. Roda, and P. Pasini
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