ZSCAN1 and cancer: As the relatively low baseline of ZSCAN1 expression level in BC cancer cells, only qRT-PCR was adopted and the result showed that ZSCAN1 was significantly inhibited in BCSLCs versus adherent parental cells (Figure 2A, n =3, P < 0.001 in all cells), indicating the relationship between ZSCAN1 and the stemness of BCSLCs.