Figure 5. Expression of CCNB1 in different molecular subtyping of BC. (A) The relative expression of CCNB1 in luminal A, luminal B, Her2+, basal like and MCF 10A cell lines. CCNB1 expression was higher in the four molecular subtyping of BC (luminal A, luminal B, Her2+, basal like) than in the normal group. (B) Compared with the MCF 10A cell line, CCNB1 was up-regulated in luminal A, luminal B and basal-like cell lines, but down-regulated in Her2+ cell line, as verified by qRT-PCR. *p < 0.05, **p < 0.01, ***p < 0.001. Abbreviation: BC: breast cancer.