PIK3C2A and breast cancer: Accordingly, analysis of PIK3C2A mRNA levels from a Cancer Cell Line Encyclopedia (CCLE) panel[14] in luminal (low aggressiveness) or basal‐like/triple‐negative (highly aggressive) human breast cancer cell lines showed a significant correlation between high PIK3C2A expression and basal‐like/triple‐negative subtype (Figure S1a, Supporting Information).