CT47A1 and ductal breast carcinoma in situ: Figure 10 shows that the genetic expression of VAMP4 is down-regulated in the LH samples compared to the remaining samples while the gene BLP is up-regulated in the LH samples compared to the remaining samples. CT47A1 is one of seven cancer/testis genes in the CT class. CT genes are significantly overexpressed in ductal carcinoma in situ DCIS (Caballero et al., 2014).