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- W1981103061 abstract "AbstractIn the classical form of alpha-1-antitrypsin (AT) deficiency a point mutation renders aggregation-prone properties on a hepatic secretory protein. The mutant ATZ protein in retained in the endoplasmic reticulum (ER) of liver cells rather than secreted into the blood and body fluids where it ordinarily functions as an inhibitor of neutrophil proteases. A loss-of-function mechanism allows the neutrophil proteases to slowly destroy the connective tissue matrix of the lung, resulting in premature development of pulmonary emphysema as early as the third decade of life. A gain-of-toxic function mechanism is responsible for liver inflammation and carcinogenesis. Indeed this deficiency is the most common genetic cause of liver disease in children in the US. It also causes chronic liver inflammation and carcinoma that manifests itself later in life. However, the majority of affected homozygotes apparently escape liver disease. This last observation has led to the concept that genetic and/or environmental modifiers affect the disposal of mutant ATZ within the ER or affect the protective cellular responses activated by accumulation of ATZ in the ER and, in turn, these modifiers determine which homozygotes develop liver inflammation and carcinoma. In this article I review a series of studies published over the last 6 years showing that autophagy is specifically activated by ER accumulation of ATZ and that autophagy plays a critical role in the disposal of this mutant protein. Further, I review data suggesting that the autophagy is specifically designed for the cellular response to aggregated ATZ and aggregated proteins in general." @default.
- W1981103061 created "2016-06-24" @default.
- W1981103061 creator A5044222068 @default.
- W1981103061 date "2006-07-11" @default.
- W1981103061 modified "2023-10-14" @default.
- W1981103061 title "The Role of Autophagy in Alpha-1-Antitrypsin Deficiency: A Specific Cellular Response in Genetic Diseases Associated with Aggregation-Prone Proteins" @default.
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- W1981103061 doi "https://doi.org/10.4161/auto.2882" @default.
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