MMP7 and breast cancer: Normalized mRNA levels for BC cell lines show that the high-MMP7 expressing TN breast cancer cells (HCC38, HCC70, DKAT, and SUM149) have significantly lower levels of MMP7 mRNA as compared to the other low-MMP7 expressing TN cells as well as no-MMP7 expressing non-TN cells (MCF, T47D).