HSPA5 and breast cancer: In particular, the known GRP78 inhibitor HA15 (N-[4-[3-[[[5-(Dimethylamino)-1-naphthalenyl]sulfonyl]amino]phenyl]-2-thiazolyl]-acetamide), if combined with PRDM14 knockdown, diminished the fraction of CSC-like SP cells in breast cancer HCC1937 cells [80].