To further investigate whether the panobinostat-induced changes discussed above were specific to the basal-B subtype, MDA-MB-468 (basal-A) and MCF-7 (luminal) cell lines were also tested by Human Breast Cancer and Estrogen Receptor Signaling RT2 ProfilerTM PCR Array following 24 hours of panobinostat treatment. Here, ESR1 is linked to breast carcinoma.