ZEB1 and hyperinsulinemic hypoglycemia, familial, 4: The results of qPCR showed that the expression of zeb1 and snail2 was increased in the 0.5 mM glutamine deficiency group in SW480 cells (Fig. 4A). Zeb1 expression in the 0.5 mM and 1.0 mM glutamine deficiency groups was significantly increased compared with that in the normal glutamine group in DLD1 cells.