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  • Title: Clinical, Biochemical, and Genetic Findings of Cystinuria in Chinese Children.
    Author: Ma YY, Liu YP, Li D, Li XY, Song JQ, Yang YL.
    Journal: Clin Lab; 2018 Jul 01; 64(7):1145-1151. PubMed ID: 30146843.
    Abstract:
    BACKGROUND: Cystinuria is a rare inherited renal stone disease caused by mutations in the SLC3A1 and SLC7A9 genes. The Chinese cystinuria phenotype and genotype have rarely been reported in the literature. METHODS: For this research, the clinical features and genetic etiology were analyzed in seven children, and the clinical characteristics were summarized. The blood and urine amino acids and acylcarnitine were analyzed. Additionally, the whole coding sequence and exon-intron junctions of the SLC3A1 and SLC7A9 genes were analyzed. RESULTS: These seven patients with cystinuria were from seven unrelated Chinese families, and they were diagnosed between the ages of 1 month and 16 years old. The urinary amino acids, including ornithine, arginine, and threonine, were elevated in these patients. A homozygous c.325G>A mutation in SLC7A9 was identified in two patients, and six SLC3A1 mutations were found in five patients. CONCLUSIONS: The core pedigree analysis showed that most of the parents carried mutations; however, there was no association between the clinical course and the genotype.
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