ESR1 and breast carcinoma: Analysis of the GDC TCGA Breast Cancer database revealed a strong positive correlation between PRKCQ-AS1 and PAX5 in 486 ER+/ HER2-negative breast cancer samples (Fig. 6B), whereas no significant correlation was observed with PRKCQ-AS1 and TFAP2A, RUNX1, or AR (Fig. S12A-C).