Sarcosinemia

Sarcosinemia
Other names	Sarcosine dehydrogenase complex deficiency
Sarcosine
Specialty	Endocrinology

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

Sarcosinemia has an autosomal recessive pattern of inheritance.

Sarcosinemia is thought to be caused by a mutation in the sarcosine dehydrogenase (SARDH) gene, which is located at human chromosome 9q34.^[2][3]

The disease is inherited in an autosomal recessive manner,^[2] which 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.^{[citation needed]}

Diagnosis

Treatment

See also

• Inborn errors of metabolism

References

1. Online Mendelian Inheritance in Man (OMIM): 268900
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. 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. doi:10.47102/annals-acadmedsg.V35N8p582. ISSN 0304-4602. PMID 17006587. S2CID 27179429.

External links

• Sarcosinemia at NIH's Office of Rare Diseases