Preferred Label : Cystinosis, nephropathic;
Symbol : CTNS;
CISMeF acronym : CTNS;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Lysosomal cystine transport protein, defect of; Cystinosin, defect of;
Included titles and symbols : Cystinosis, infantile nephropathic; Cystinosis, atypical nephropathic;
Description : Cystinosis has been classified as a lysosomal storage disorder on the basis of cytologic
and other evidence pointing to the intralysosomal localization of stored cystine.
Cystinosis differs from the other lysosomal diseases inasmuch as acid hydrolysis,
the principal enzyme function of lysosomes, is not known to play a role in the metabolic
disposition of cystine. The fact that plasma levels are well below saturation indicates
that the defect is a cellular one. Within the cell, cystine is compartmentalized with
acid phosphatase and is membrane-bound as demonstrated by electron microscopy. Ferritin
accumulates in the same organelle which appears to be the lysosome.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the cystinosin gene (CTNS, 219800.0001);
Laboratory abnormalities : Proteinuria; Glucosuria; Normal blood glucose; Hyponatremia; Kypokalemia; Carnitine deficiency; Hypophosphatemia; Generalized aminoaciduria; Microscopic hematuria; Elevated white blood cell cystine;
Prefixed ID : #219800;
Origin ID : 219800;
UMLS CUI : C2931187;
Automatic exact mappings (from CISMeF team)
Currated CISMeF NLP mapping
DO Cross reference
Genes related to phenotype
HPO term(s)
Not associated HPO term(s)
ORDO concept(s)
See also inter- (CISMeF)
Semantic type(s)
UMLS correspondences (same concept)
Validated automatic mappings to BTNT