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Items: 4

1.

Cystinuria

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). [from OMIM]

MedGen UID:
8226
Concept ID:
C0010691
Disease or Syndrome
2.

Hyperlysinemia

Hyperlysinemia type I is an autosomal recessive metabolic condition with variable clinical features. Some patients who present in infancy with nonspecific seizures, hypotonia, or mildly delayed psychomotor development have been found to have increased serum lysine and pipecolic acid on laboratory analysis. However, about 50% of probands are reported to be asymptomatic, and hyperlysinemia is generally considered to be a benign metabolic variant (summary by Tondo et al., 2013; Houten et al., 2013). The AASS gene encodes a bifunctional enzyme: lysine alpha-ketoglutarate reductase and saccharopine dehydrogenase. In hyperlysinemia type I, both enzymatic functions of AASS are defective; in hyperlysinemia type II, also known as saccharopinuria (268700), some of the first enzymatic function is retained (Cox, 1985; Cox et al., 1986). [from OMIM]

MedGen UID:
82816
Concept ID:
C0268553
Disease or Syndrome
3.

Hyperdibasic aminoaciduria type 1

Hyperdibasic aminoaciduria, type 1 is characterized by increased renal clearance of lysine, ornithine and arginine, in the presence of normal concentrations of cystine. Heterozygous individuals are asymptomatic but homozygotes display intellectual deficit. To date, 25 heterozygotes and one homozygote have been reported. [from MONDO]

MedGen UID:
435997
Concept ID:
C2673736
Disease or Syndrome
4.

Argininuria

A increased concentration of arginine in the urine. [from HPO]

MedGen UID:
871162
Concept ID:
C4025635
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