Die Hartnup-Störung ist eine autosomal rezessive Erkrankung, die durch Mutationen des SLC6A19-Gens ausgelöst wird. Es ist eine Störung des Transports von neutralen Aminosäuren und kann sowohl den Darm wie auch die Niere betreffen. Zu den klinischen Symptomen gehören eine Pellagra-artige Dermatitis und eine Ataxie sowie emotionale Störungen.
Der Typ 1 betrifft sowohl die enterale wie auch die renale Resorption von neutralen Aminosäuren, während beim Typ 2 nur die renale Resorption gestört ist.
Die Häufigkeit wird mit 1:100.000 angegeben.
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Orphanet article Orphanet ID 2116
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OMIM.ORG article Omim 234500
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