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Impaired riboflavin transport due to missense mutations in SLC52A2 causes Brown-Vialetto-Van Laere syndrome.
J. Inherit. Metab. Dis. 35, 943-948 (2012)
Brown-Vialetto-Van Laere syndrome (BVVLS [MIM 211530]) is a rare neurological disorder characterized by infancy onset sensorineural deafness and ponto-bulbar palsy. Mutations in SLC52A3 (formerly C20orf54), coding for riboflavin transporter 2 (hRFT2), have been identified as the molecular genetic correlate in several individuals with BVVLS. Exome sequencing of just one single case revealed that compound heterozygosity for two pathogenic mutations in the SLC52A2 gene coding for riboflavin transporter 3 (hRFT3), another member of the riboflavin transporter family, is also associated with BVVLS. Overexpression studies confirmed that the gene products of both mutant alleles have reduced riboflavin transport activities. While mutations in SLC52A3 cause decreased plasma riboflavin levels, concordant with a role of SLC52A3 in riboflavin uptake from food, the SLC52A2-mutant individual had normal plasma riboflavin concentrations, a finding in line with a postulated function of SLC52A2 in riboflavin uptake from blood into target cells. Our results contribute to the understanding of human riboflavin metabolism and underscore its role in the pathogenesis of BVVLS, thereby providing a rational basis for a high-dose riboflavin treatment.
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Anmerkungen
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
FUNCTIONAL-CHARACTERIZATION; IDENTIFICATION; BRAIN; RAT
Sprache
englisch
Veröffentlichungsjahr
2012
HGF-Berichtsjahr
2012
ISSN (print) / ISBN
0141-8955
e-ISSN
1573-2665
Zeitschrift
Journal of Inherited Metabolic Disease
Quellenangaben
Band: 35,
Heft: 6,
Seiten: 943-948
Verlag
Springer
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Human Genetics (IHG)
POF Topic(s)
30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
Forschungsfeld(er)
Genetics and Epidemiology
PSP-Element(e)
G-500700-001
PubMed ID
22864630
WOS ID
WOS:000309874000002
Scopus ID
84867855897
Erfassungsdatum
2012-11-30