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Genetic and Rare Diseases Information Center (GARD)

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Other Names for this Disease
  • Alpha-aminoadipic semialdehyde synthase deficiency
  • L-lysine NAD-oxido-reductase deficiency
  • Lysine alpha-ketoglutarate reductase deficiency
  • Lysine intolerance
  • Lysine intolerance
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Hyperlysinemia is an inherited condition characterized by elevated blood levels of the amino acid lysine. Hyperlysinemia typically causes no health problems, and most people with elevated lysine levels are unaware that they have this condition. Rarely, people with hyperlysinemia have intellectual disability or behavioral problems. Hyperlysinemia is caused by mutations in the AASS gene. It has an autosomal recessive pattern of inheritance.[1][2]
Last updated: 1/28/2013


  1. Hyperlysinemia. Genetics Home Reference (GHR). August 2009; Accessed 1/28/2013.
  2. Hyper LYS - Hyperlysinemia . Newborn Screening Coding and Terminology Guide. April 2011; Accessed 1/28/2013.
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  • MeSH® (Medical Subject Headings) is a terminology tool used by the National Library of Medicine. Click on the link to view information on this topic.
  • 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 Hyperlysinemia. Click on the link to view a sample search on this topic.