Alpha 1-antitrypsin deficiency
Other Names for this Disease
- A1AT deficiency
- AAT deficiency
- Alpha 1 antitrypsin deficiency
 Alpha-1 antitrypsin (AAT) is a protein that protects the lungs. The liver usually makes the protein, and releases it into the bloodstream. Because of a mutation in the SERPINA1 gene, some people have little or no AAT. 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. This condition is caused by mutations in the SERPINA1 gene and inherited in an autosomal co-dominant fashion.Alpha 1-antitrypsin deficiency is an inherited disorder that can cause lung disease in adults and liver disease in adults and children.
Last updated: 9/3/2015
- Alpha-1 antitrypsin deficiency. Genetics Home Reference (GHR). January 2013; http://www.ghr.nlm.nih.gov/condition/alpha-1-antitrypsin-deficiency. Accessed 9/3/2015.
- Alpha 1-Antitrypsin Deficiency. MedlinePlus. August 2014; http://www.nlm.nih.gov/medlineplus/alpha1antitrypsindeficiency.html. Accessed 9/3/2015.
- Genetics Home Reference (GHR) contains information on Alpha 1-antitrypsin deficiency. This website is maintained by the National Library of Medicine.
- MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.
- The National Heart, Lung, and Blood Institute (NHLBI) provides leadership for a national program in diseases of the heart, blood vessels, lung, and blood; blood resources; and sleep disorders. Since October 1997, the NHLBI has also had administrative responsibility for the NIH Woman's Health Initiative. Click on the link to view information on this topic.
- The National Human Genome Research Institute's (NHGRI) mission encompasses a broad range of studies aimed at understanding the structure and function of the human genome and its role in health and disease. Click on the link to view the information page on this topic.
- The National Organization for Rare Disorders (NORD) is a federation of more than 130 nonprofit voluntary health organizations serving people with rare disorders. Click on the link to view information on this topic.
- Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
- Online Mendelian Inheritance in Man (OMIM) is a 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 Alpha 1-antitrypsin deficiency. Click on the link to view a sample search on this topic.