" /> Cystinuria - CISMeF





Preferred Label : Cystinuria;

CISMeF acronym : CSNU; CSNU1; CSNU3;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Cystinuria, type I; Cystinuria, type II; Cystinuria, type III; Cystinuria, type non-I; CSNU; CSNU1; CSNU3;

Included titles and symbols : Cystinuria, type a; Cystinuria, type b; Cystinuria, type a/b;

Description : Cystinuria is an autosomal disorder characterized by impaired epithelial cell transport of cystine and dibasic amino acids (lysine, ornithine, and arginine) in the proximal renal tubule and gastrointestinal tract. The impaired renal reabsorption of cystine and its low solubility causes the formation of calculi in the urinary tract, resulting in obstructive uropathy, pyelonephritis, and, rarely, renal failure (summary by Barbosa et al., 2012).;

Inheritance : Autosomal dominant; Autosomal recessive;

Molecular basis : Caused by mutation in the solute carrier family 3 (cystine, dibasic, and neutral amino acid transporter), member 1 gene (SLC3A1, 104614.0001); Caused by mutation in the solute carrier family 7 (cationic amino acid transporter, y system), member 9 gene (SLC7A9, 604144.0001);

Laboratory abnormalities : Increased urinary excretion of cystine; Increase urinary excretion of lysine, arginine, and ornithine;

Prefixed ID : #220100;

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02/05/2025


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