RT Journal Article T1 The clinical and biochemical hallmarks generally associated with GLUT1DS may be caused by defects in genes other than SLC2A1. A1 Sanchez-Lijarcio, Obdulia A1 Yubero, Delia A1 Leal, Fatima A1 Couce, Maria L A1 Gonzalez Gutierrez-Solana, Luis A1 Lopez-Laso, Eduardo A1 Garcia-Cazorla, Angels A1 Pias-Peleteiro, Leticia A1 de Azua Brea, Begoña A1 Ibañez-Mico, Salvador A1 Mateo-Martinez, Gonzalo A1 Troncoso-Schifferli, Monica A1 Witting-Enriquez, Scarlet A1 Ugarte, Magdalena A1 Artuch, Rafael A1 Perez, Belen K1 GLUT1 K1 GLUT1DS K1 SLC2A1 K1 Hypoglycorrhachia AB Glucose transporter 1 deficiency syndrome (GLUT1DS) is a neurometabolic disorder caused by haploinsufficiency of the GLUT1 glucose transporter (encoded by SLC2A1) leading to defective glucose transport across the blood-brain barrier. This work describes the genetic analysis of 56 patients with clinical or biochemical GLUT1DS hallmarks. 55.4% of these patients had a pathogenic variant of SLC2A1, and 23.2% had a variant in one of 13 different genes. No pathogenic variant was identified for the remaining patients. Expression analysis of SLC2A1 indicated a reduction in SLC2A1 mRNA in patients with pathogenic variants of this gene, as well as in one patient with a pathogenic variant in SLC9A6, and in three for whom no candidate variant was identified. Thus, the clinical and biochemical hallmarks generally associated with GLUT1DS may be caused by defects in genes other than SLC2A1. PB Wiley YR 2022 FD 2022-03-31 LK http://hdl.handle.net/10668/19926 UL http://hdl.handle.net/10668/19926 LA en NO Sánchez-Lijarcio O, Yubero D, Leal F, Couce ML, González Gutiérrez-Solana L, López-Laso E, et al. The clinical and biochemical hallmarks generally associated with GLUT1DS may be caused by defects in genes other than SLC2A1. Clin Genet. 2022 Jul;102(1):40-55 DS RISalud RD Apr 19, 2025