On the other hand, 25.8% (8/31) of the breast cancer cell lines (BT474, HCC-202, Hs 578T, MCF-7, MDA-MB-134 VI, MDA-MB-415, MDA-MB-436 and PMC42) expressed marked PKD1 mRNA levels (Table 1). This evidence concerns the gene PKD1 and breast carcinoma.