Sarcosinemia
| Sarcosinemia | |
|---|---|
| Classification and external resources | |
 | |
| ICD-10 | E72.5 |
| ICD-9 | 270.8 |
| OMIM | 268900 |
| DiseasesDB | 29841 |
Sarcosinemia (SAR), also called hypersarcosinemia and SARDH deficiency,[1] is a rare autosomal recessive[2] metabolic disorder characterized by an increased concentration of sarcosine in blood plasma and urine ("sarcosinuria"). It can result from an inborn error of sarcosine metabolism, or from severe folate deficiency related to the folate requirement for the conversion of sarcosine to glycine. It is thought to be a relatively benign condition.[3]
Cause and Genetics
Sarcosinemia is thought to be caused by a mutation in the sarcosine dehydrogenase (SARDH) gene. The SARDH gene is located at human chromosome 9q34.[2][3]
The disease is inherited in an autosomal recessive manner.[2] This means the defective gene responsible for the disorder is located on an autosome (chromosome 9 is an autosome), and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder. The parents of an individual with an autosomal recessive disorder both carry one copy of the defective gene, but usually do not experience any signs or symptoms of the disorder.
See also
- Inborn errors of metabolism
References
- ↑ Online 'Mendelian Inheritance in Man' (OMIM) 268900
- ↑ 2.0 2.1 2.2 Brunialti AL, Harding CO, Wolff J, Guénet JL (1996). "The mouse mutation sarcosinemia (sar) maps to chromosome 2 in a region homologous to human 9q33-q34". Genomics 36 (1): 182–4. doi:10.1006/geno.1996.0442. PMID 8812433.
- ↑ 3.0 3.1 Lee SY, Chan KY, Chan AY, Lai CK (2006). "A report of two families with sarcosinaemia in Hong Kong and revisiting the pathogenetic potential of hypersarcosinaemia" (Free full text). Annals of the Academy of Medicine, Singapore 35 (8): 582–4. ISSN 0304-4602. PMID 17006587.
External links
- Sarcosinemia at NIH's Office of Rare Diseases
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