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Genetic and Rare Diseases Information Center (GARD)


Other names people use for this condition
  • AAT deficiency
  • A1AT deficiency
  • AATD
  • Alpha 1 antitrypsin deficiency



Alpha 1-antitrypsin deficiency
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Alpha 1-antitrypsin deficiency is an inherited disorder that can cause lung disease in adults and liver disease in adults and children.[1] Alpha-1 antitrypsin (AAT) is a protein that protects the lungs. The liver usually makes the protein, and releases it into the bloodstream.[2] Because of a mutation in the SERPINA1 gene, some people have little or no AAT.[1][2] Not having enough AAT may lead to emphysema or liver problems. Smoking increases the risk. A deficiency of AAT can be treated but not cured. One treatment involves adding to or replacing the missing protein. More severe cases may require a lung transplant.[2] This condition is caused by mutations in the SERPINA1 gene and inherited in an autosomal co-dominant fashion.[1]


References
  1. Alpha 1-antitrypsin deficiency. Genetics Home Reference (GHR). August 2009 Available at: http://www.ghr.nlm.nih.gov/condition/alpha-1-antitrypsin-deficiency. Accessed July 26, 2011.
  2. Alpha 1-Antitrypsin Deficiency. MedlinePlus. January 2011 Available at: http://www.nlm.nih.gov/medlineplus/alpha1antitrypsindeficiency.html. Accessed July 26, 2011.
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