Methods for multiplex detection of polynucleotides using unbound fluorescent probes and quencher oligonucleotides

Abstract

Compositions and methods for quantitative detection of target nucleic acids, such as miRNAs are disclosed. The methods are especially advantageous for single-color multiplex detection of two or more targets simultaneously (e.g., in the same reaction). The methods can involve optional reverse transcription followed by amplification performed with universal primers, fluorophore-labeled detection probes, and quencher oligonucleotides for quenching fluorescence of any detection probe not bound to a target molecule. The methods employ differential stability of detection probe-quencher oligonucleotide complexes, and by extension, differential fluorescence at various temperatures to distinguish between different target molecules.

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