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This is an open-label, 2-part, dose-escalating, Phase 1 study of INBRX-101 (rhAAT-Fc). Part 1 will consist of single ascending dose (SAD) administration of INBRX-101 and Part 2 will consist of multiple ascending dose (MAD) administrations of INBRX-101. The planned dosing schedule is IV every 3 to 4 weeks.
The purpose of this study is to look at how Alpha-1-antitrypsin (AAT) deficiency and Cystic Fibrosis (CF) affect white blood cells in the lungs, called macrophages, and their ability to work.
This project is designed to examine the interaction between the microflora in the lower airway and the concentration of a serum protein called alpha-1 antitrypsin. The hypothesis is that alpha-1 antitrypsin impacts the diversity and content of the lower airway microflora, resulting in a less inflammatory airway. The Specific Aims are: 1. To compare the lower respiratory tract microbiome and virome population diversity and content in age and GOLD stage matched PiZZ individuals not receiving augmentation therapy, PiZZ individuals on augmentation therapy, PiMZ individuals not receiving augmentation therapy, and PiMM individuals with chronic obstructive pulmonary disease (COPD). 2. Determine correlations between bronchoalveolar lavage (BAL) and peripheral blood gene expression patterns and patterns in lung microbial and viral populations across all cohorts. 3. Correlate the presence or absence of computed tomography (CT) bronchiectasis and bronchiolectasis with patterns in the microbiome population diversity and content. 4. To identify and define novel molecular phenotypes of Alpha-1 Antitrypsin Deficiency (AATD) based on computational integration of clinical, transcriptomic, and microbiome data.
We hypothesize that individuals with Alpha-1 Antitrypsin (AAT) deficiency have ongoing liver injury which is not detected by the usual blood tests used to look at liver function. This ongoing liver injury leads to cirrhosis in a significant number of adults with AAT deficiency.