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We attempted to apply fluorescence resonance energy transfer technology to nucleic acid sequence-based amplification (FRET-NASBA) on the platform of the LightCycler system to detect Aspergillus species. Primers and probes for the Aspergillus 18S rRNA were newly designed to avoid overlapping with homologous sequences of human 18s rRNA. NASBA using molecular beacon (MB) showed non-specific results which have been frequently observed from controls, although it showed higher sensitivity (10(-2) amol) than the FRET. FRET-NASBA showed a sensitivity of 10(-1) amol and a high fidelity of reproducibility from controls. As FRET technology was successfully applied to the NASBA assay, it could contribute to diverse development of the NASBA assay. These results suggest that FRET-NASBA could replace previous NASBA techniques in the detection of Aspergillus.

medical mycology

Evaluation of nucleic acid sequence based amplification using fluorescence resonance energy transfer (FRET-NASBA) in quantitative detection of<i>Aspergillus</i>18S rRNA

Evaluation of nucleic acid sequence based amplification using fluorescence resonance energy transfer (FRET-NASBA) in quantitative detection ofAspergillus18S rRNA