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| | types of alpha-1 antitrypsin, emphysema, alpha-1 antitrypsin deficiency |
 | | The main function of the alpha-1 antitrypsin protein is to neutralize another protein (or enzyme) called neutrophil elastase, which is normally contained within one type of white blood corpuscle called the polymorphonuclear leukocyte, or PMN for short. |
 | | Under normal conditions, neutrophil elastase is inactivated by alpha 1-antitrypsin, but in conditions of excessive infection or inflammation when the burden of neutrophil elastase is high, or under conditions of alpha-1 antitrypsin deficiency, when the alpha-1 antitrypsin protective screen is depleted, unopposed action of neutrophil elastase can allow elastin breakdown and resultant emphysema. |
 | | Although several different mechanisms can cause alpha 1 deficiency, the commonest type of deficiency (called the ZZ type) is due to the liver cell’s inability to secrete the protein, which congeals within the liver cell. |
| cms.clevelandclinic.org /ccfpulmonary/body.cfm?id=215 (910 words) |
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