microRNA expression signature in estrogen receptor-positive and -negative breast cancers

Micro RNA (miRNA) profiling of breast cancer subtype was demonstrated using RT-PCR. We present herein two cases with miRNA profiling in estrogen receptor (ER)-positive and -negative breast cancer. The level of miR-181a expression in ER-positive cancer was higher than in ER-negative cancer, while expression of miR-27a, -107 and -195 was lower in ER-positive when compared with ER-negative cancer. qPCR-micro RNA expression profiling. Six samples (triplicate, sample1: reference, sample2; control)