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- W2606020565 abstract "Introduction Glucose transporter type 1 deficiency syndrome (GLUT1-DS) is a rare metabolic encephalopathy with a wide variation of clinical phenotypes. Familial variants are often milder than de novo cases, and may therefore remain undiagnosed. The aim of this study was to characterize the clinical course of GLUT1-DS in a four-generation Norwegian family where the oldest generations had never received any treatment. Method Through interviews and clinical investigations, we characterized a family of 26 members, where 11 members had symptoms strongly suggesting GLUT1-DS. All members were offered genetic testing of the SLC2A1 gene. Affected members were offered treatment with ketogenic diet, and the effect of the treatment was registered. Results We sequenced the SLC2A1 gene in 13 members, and found that 10, all with symptoms, had the c.823G>A (p.Ala275Thr) variant. All affected members had experienced early-onset epilepsy, paroxysmal exercise-induced dyskinesias, and most had mild learning disability. Moreover, some had symptoms and signs of a distal neuropathy in addition to reduced sense of orientation and excessive daytime sleep. Their load of symptoms had decreased over the years, although that they never had received any treatment. Nevertheless, those who started dietary treatment all experienced an improved quality of life. Conclusion We report a four-generation family with GLUT1-DS where the disease has a mild course, even when untreated. In addition to classical GLUT1-DS features, we also describe symptoms which have never been reported in GLUT1-DS previously. As such, this family extends the phenotypic spectrum of GLUT1-DS and underlines the importance of diagnosing also relatively mildly affected patients, even in adult life, as they also seem to benefit from dietary treatment." @default.
- W2606020565 created "2017-04-28" @default.
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- W2606020565 date "2017-05-01" @default.
- W2606020565 modified "2023-09-23" @default.
- W2606020565 title "GLUT1-deficiency syndrome: Report of a four-generation Norwegian family with a mild phenotype" @default.
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- W2606020565 doi "https://doi.org/10.1016/j.yebeh.2017.02.016" @default.
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