SLC35F2 and neuroblastoma: YM155 is transported by SLC35F2 into cells and lack of SLC35F2 has been associated with decreased cellular YM155 sensitivity.15 The drug-resistant neuroblastoma cell lines UKF-NB-3rCDDP1000, UKF-NB-6rDOX20, and UKF-NB-6rVCR20 were characterized by reduced SLC35F2 expression relative to the respective parental cells.