Abstract
Alpha-1 antitrypsin deficiency (AATD) is a common genetic disorder characterized by a mutation in the SERPINA1 gene that codes for the alpha-1 antitrypsin protein. A homozygous mutation leads to the production of the Z protein, which takes an abnormal configuration that prevents its secretion from the hepatocyte, leading to a concomitant deficiency of the protein in the lung. The retained mutant Z protein in the endoplasmic reticulum of the hepatocyte activates a cascade of cell injury that leads to apoptosis, fibrosis, and in some individuals, cirrhosis. Clinical manifestations and progression of disease are highly variable even amongst Pi*ZZ homozygote individuals, suggesting a role from other genetic and environmental influences. Current treatment for liver disease from AATD consists mostly of supportive care and liver transplantation if indicated, but new and promising therapeutic approaches that include gene therapy, stem cell transplantation, and stimulation of autophagy are currently under investigation.
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Te, H.S. (2017). Metabolic and Genetic Liver Diseases: Alpha-1 Anti-trypsin Deficiency. In: Saeian, K., Shaker, R. (eds) Liver Disorders. Springer, Cham. https://doi.org/10.1007/978-3-319-30103-7_19
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DOI: https://doi.org/10.1007/978-3-319-30103-7_19
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