PiMZ Longitudinal Cohort (PiMZ Logic)

Progression of lung disease in patients with Alpha-1 Anti-trypsin deficiency is variable and while some patients may have stable lung function over many years, some progress and deteriorate rapidly. Currently there are no predictors that would help identify patient at risk of rapid deterioration in the PiMZ patient population. The aim of this study is to identify markers and features in CT imaging that may allow identification of these patients early before deterioration. To achieve this, the study will follow a cohort of patients with confirmed Alpha-1 Anti-trypsin deficiency (MZ genotype) and obstructive lung disease and measure a number of biomarkers in blood and sputum and obtain high resolution CT scans at baseline and again three years later. If the study is able to determine markers that allow the identification of patients at risk early, the investigator may be able to study early interventions in later studies and possibly find ways to avoid serious complications. Patients will be followed longitudinally to assess deterioration of lung function. Study procedures include: Review of medical history and medication history, blood draw, spriometry, induced sputum (at some sites), completion of questionnaires and CT Chest scan. All of the mentioned procedures above will be performed on enrollment and repeated at 18 months and 36 months, with the exception of monthly Alpha- net exacerbation questionnaires.