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Alpha-1 antitrypsin deficiency (A1AD or AATD) is a genetic disorder that may result in lung disease or liver disease. [1] Onset of lung problems is typically between 20 and 50 years of age. [ 1 ] This may result in shortness of breath , wheezing , or an increased risk of lung infections .
Alpha-1 antitrypsin or α 1-antitrypsin (A1AT, α 1 AT, A1A, or AAT) is a protein belonging to the serpin superfamily. It is encoded in humans by the SERPINA1 gene . A protease inhibitor , it is also known as alpha 1 –proteinase inhibitor ( A1PI ) or alpha 1 -antiproteinase ( A1AP ) because it inhibits various proteases (not just trypsin ). [ 5 ]
John W. Walsh (February 4, 1949 – March 7, 2017) was an American non-profit leader and patient advocate.After being diagnosed with alpha-1 antitrypsin deficiency, he co-founded the Alpha-1 Foundation and AlphaNet, both of which serve people diagnosed with that condition, and the COPD Foundation, which serves people with chronic obstructive pulmonary disease.
Alpha-1 antitrypsin deficiency is an autosomal co-dominant disorder of low levels of the enzyme alpha-1 antitrypsin [33] Cardiac cirrhosis is due to chronic right-sided heart failure, which leads to liver congestion [33] Galactosemia [58] Glycogen storage disease type IV [45] Cystic fibrosis [33]
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In medicine, protease inhibitor is often used interchangeably with alpha 1-antitrypsin (A1AT, which is abbreviated PI for this reason). [3] A1AT is indeed the protease inhibitor most often involved in disease, namely in alpha-1 antitrypsin deficiency.
Fecal alpha 1-antitrypsin may be quantified in a random stool sample, or more accurately, in a 24-hour stool sampling to quantify the amount of protein loss in PLE. [8] In suspected cases of local disease, or when PLE is suspected to be due to lymph drainage abnormalities, lymphangiography may be used to localize the areas of lymphatic leakage. [8]
The alpha-1 fraction does not disappear in alpha 1-antitrypsin deficiency, however, because other proteins, including alpha-lipoprotein and orosomucoid, also migrate there. As a positive acute phase reactant, AAT is increased in acute inflammation. [citation needed] Bence Jones protein may bind to and retard the alpha-1 band. [citation needed]
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