SLC38A1 and lung adenocarcinoma: However, when we analyzed the expression of Na+-coupled nutrient transporters, potential important downstream effectors of TASK-1, we found a significantly increased expression of the Na+/myo-inositol co-transporter SLC5A3, the Na+-dependent multivitamin transporter (SMVT) SLC5A6, and the Na+-dependent glutamine transporter SLC38A1 in lung adenocarcinomas compared to normal lung tissue.