ST8SIA1 and breast carcinoma: However, Cavdarli et al., 2021, reported the localization of Ganglioside GD2 and its 9-O-acetylated form OAcGD2 in breast cancer cells (Hs 578T, SUM159PT, MDA-MB-231 GD3S+ and MCF7 GD3S+) on the cell surface and in “punctate” structures [83].