This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.This study is designed to evaluate the safety and tolerability of Alpha-1 MP in adult subjects with Alpha1-antitrypsin deficiency and will be conducted in approximately 12 centers in North America and Europe. A total of 35 adults will be enrolled in the study with a minimum of 15 subjects, i.e., those subjects that have never received previous Alpha1-Proteinase Inhibitor augmentation therapy. The duration of study participation is 20 weeks of weekly treatment, 1 week for screening, and follow-up phone call, which will occur 7 days following the last treatment A final visit will occur 4 weeks following the last treatment. During the treatment period, enrolled subjects will receive 20 weekly infusions of Alpha-1 MP. Since the half-life of Alpha1-Proteinase Inhibitor is approximately 5 days, an Alpha1-Proteinase Inhibitor treatment-free period will not be required prior to study entry and patients will not have to interrupt their weekly treatments to participate in the study. Blood samples will be drawn pre- and post-infusion with viral screening conducted at baseline, 2 months following treatment initiation (Week 8), 4 months following treatment initiation (Week16) end of treatment (Week 20), and 1 month following the end of treatment (Week 24). Additionally, blood samples are drawn for the performance of immunogenicity assays at baseline (Week 1) and 1 month following the end of treatment period (Week 24). If any immunogenetic response to Alpha1-Proteinase Inhibitor is detected in a subject?s blood sample, an Alpha1-Proteinase Inhibitor neutralizing antibody assay will also be performed on that subject?s sample.
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