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Pathway Description
Maple Syrup Urine Disease
Mus musculus
Category:
Metabolite Pathway
Sub-Category:
Disease
Created: 2018-09-10
Last Updated: 2019-09-15
Maple syrup urine disease, also called BCKD deficiency, is a rare inborn error of metabolism (IEM) and autosomal recessive disorder caused by a defective BCKDHA, BKCDHB or DBT gene. These genes code for a protein which is vital in the breakdown of amino acids, specifically the amino acids leucine, isoleucine and valine. This disorder is characterized by a large accumulation of these amino acids in the body. Symptoms of the disorder include a distinct maple syrup smell of the urine, vomiting, lethargy, abnormal movements and delayed development. Treatment includes long-term dietary management which aims to restrict the consumption of branched-chain amino acids. It is estimated that maple syrup urine disorder affects 1 in 185,000 infants globally. This number increases significantly when looking specifically at Old World Order Mennonites, where the prevalence is 1 in 380 infants.
References
Maple Syrup Urine Disease References
Blackburn PR, Gass JM, Vairo FPE, Farnham KM, Atwal HK, Macklin S, Klee EW, Atwal PS: Maple syrup urine disease: mechanisms and management. Appl Clin Genet. 2017 Sep 6;10:57-66. doi: 10.2147/TACG.S125962. eCollection 2017.
Pubmed: 28919799
Valine, Leucine, and Isoleucine Degradation References
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Pubmed: 2251142
This pathway was propagated using PathWhiz -
Pon, A. et al. Pathways with PathWhiz (2015) Nucleic Acids Res. 43(Web Server issue): W552–W559.
Propagated from SMP0000199
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