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Sepiapterin reductase deficiency

Other Names for this Disease
  • SPR deficiency
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Sepiapterin reductase deficiency is a type of neurotransmitter disorder. It can also be more broadly classified as an inborn error of metabolism, because it is caused by an error in the pterin metabolism. Pterin metabolism plays an important role in making neurotransmitters in the brain, specifically dopamine, serotonin, biopterin, and their metabolites.[1] This deficiency is caused by mutations in the SPR gene and is inherited in an autosomal recessive fashion. Common symptoms include developmental delay, learning disability, and impaired motor skills.[1] Treatment with levodopa has shown much success causing drastic improvements in motor functioning.[1]
Last updated: 2/18/2009


  1. Echenne B et al.,. Sepiapterin reductase deficiency: Clinical presentation and evaluation of long-term therapy. Pediatric Neurology. 2006;
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Basic Information

  • Genetics Home Reference (GHR) contains information on Sepiapterin reductase deficiency. This website is maintained by the National Library of Medicine.

In Depth Information

  • The Online Mendelian Inheritance in Man (OMIM) is an catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs.  Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Sepiapterin reductase deficiency. Click on the link to view a sample search on this topic.

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