GSTM3 and cancer: To this end, we used morpholino antisense oligonucleotides (M-GSTM3, M-GSTP1, and M-Control) to treat four CC cell lines (two HPV16-positive lines, SiHa and CaSki, and two HPV18-positive lines, HeLa and CaLo), as well as two negative control of CC cell lines, breast (MDA-MB-231), and colon (COLO 205) cancer tumors.