First reported case of lysinuric protein intolerance (LPI) in Lithuania, confirmed biochemically and by DNA analysis.
We report on an 18-year-old Lithuanian girl with hepatosplenomegaly noticed at birth, which progressed thereafter. The patient had to wait about 17 years for an accurate diagnosis and appropriate therapy. Lactase deficiency, congenital cataract of the right eye, and osteoporosis were observed. Episodes of drowsiness were caused by intake of high-protein food. Laboratory findings included slight hyperammonaemia, high plasma Citr, Ala, Gly, Glu, Ser levels, as well as citrullinuria, lysinuria, glutaminuria, alaninuria, argininuria, prolinuria, hydroxyprolinuria, ornithinuria, and orotic aciduria. Aversion to high-protein diet strongly suggested a disorder resulting in hyperammonaemia. Citrullinaemia was suspected. Subsequently the diagnosis of LPI was made on the basis of biochemical and clinical features. Molecular genetic testing revealed a mutation in the SLC7A7 gene, confirming the diagnosis.
Department of Human and Medical Genetics, Vilnius University, Vilnius, Santariskiu 2, Lithuania. loreta.cimbalistiene@santa.vu.lt
Loreta
L
Cimbalistiene
Willy
W
Lehnert
Kirsi
K
Huoponen
Vaidutis
V
Kucinskas
D000293:Adolescent; D000592:Amino Acid Metabolism, Inborn Errors / Q000235:genetics*; D027241:Amino Acid Transport System y+L; D020159:Citrullinemia; D004252:DNA Mutational Analysis; D005260:Female; D027301:Fusion Regulatory Protein 1, Light Chains / Q000235:genetics*; D006801:Humans; D008097:Lithuania; D008239:Lysine / Q000097:blood / Q000652:urine*; D009154:Mutation / Q000235:genetics*
D027241:Amino Acid Transport System y+L; D027301:Fusion Regulatory Protein 1, Light Chains; C421261:SLC7A7 protein, human; D008239:Lysine