A method of reducing the abundance of a non-target micro-RNA (miRNA) that is part of a group of miRNAs is provided, including: (a) annealing a complementary region of a blocking nucleic acid to a binding site at a first end of the unwanted miRNA, ligating an adenylated nucleic acid adapter to the group of miRNAs, and performing RT-PCR on group of miRNAs. Kits and compounds for use with the method are also provided.