Iron overload was regularly detected in hepatocytes of DGUOK mutant patients by liver histological examination.[4] Thus, we checked the expression of seven genes (TF, TFRC, DMT1, FPN, IRP1, IRP2, HAMP) in iron metabolism in control, patient and corrected iHep and iHep‐Orgs. This evidence concerns the gene IREB2 and Tangier disease.