8 October 2003 Investigation of the hybridization process in DNA microarrays by fluorescence lifetime imaging
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cDNA-microarrays for expression profiling rely on the assumption that the fluorescence signal is linearly proportional to the concentration of the markers. Yet, interactions amongst different markers and with the substrate might affect the chromophore quantum yield and lead to an erroneous reading. To indirectly evaluate quantum yield changes and their relevance for DNA-microarray reading, we studied the effect on fluorescence lifetime by using a system for fluorescence lifetime imaging. Quenching of the fluorescence emission were observed in the tight environment represented by a DNA microarray due to concentration and to interactions with the processing chemicals present on the substrate.
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Daniela Comelli, Daniela Comelli, Cosimo D'Andrea, Cosimo D'Andrea, Paola Taroni, Paola Taroni, Gianluca Valentini, Gianluca Valentini, Rinaldo Cubeddu, Rinaldo Cubeddu, Clarissa Consolandi, Clarissa Consolandi, Gianluca De Bellis, Gianluca De Bellis, Luigi Rossi Bernardi, Luigi Rossi Bernardi, "Investigation of the hybridization process in DNA microarrays by fluorescence lifetime imaging", Proc. SPIE 5141, Diagnostic Optical Spectroscopy in Biomedicine II, (8 October 2003); doi: 10.1117/12.501069; https://doi.org/10.1117/12.501069

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