Alpha-1 antitrypsin inhibits SARS-CoV-2 infection
L. Wettstein, C. Conzelmann, J. A. Mueller, T. Weil, R. Gross, M. Hirschenberger, A. Seidel, S. Klute, c. Prelli-Bozzo, F. Zech, N. Preising, G. Fois, R. Lochbaum, P. Knaff, V. Mailaender, L. Staendker, D. Thal, C. Schumann, S. Stenger, K. Sparrer, A. Kleger, G. Lochnit, F. Kirchhoff, M. Frick, J. Muench
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19). To identify factors of the respiratory tract that suppress SARS-CoV-2, we screened a peptide/protein library derived from bronchoalveolar lavage, and identified 1-antitrypsin (1-AT) as specific inhibitor of SARS-CoV-2. 1-AT targets the viral spike protein and blocks SARS-CoV-2 infection of human airway epithelium at physiological concentrations. Our findings show that endogenous 1-AT restricts SARS-CoV-2 and repurposes 1-AT-based drugs for COVID-19 therapy.
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