Abstract
Human transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), causative pathogen of the COVID-19 pandemic, exerts a massive health and socioeconomic crisis. The virus infects alveolar epithelial type 2 cells (AT2s), leading to lung injury and impaired gas exchange, but the mechanisms driving infection and pathology are unclear. We performed a quantitative phosphoproteomic survey of induced pluripotent stem cell-derived AT2s (iAT2s) infected with SARS-CoV-2 at air-liquid interface (ALI). Time course analysis revealed rapid remodeling of diverse host systems, including signaling, RNA processing, translation, metabolism, nuclear integrity, protein trafficking, and cytoskeletal-microtubule organization, leading to cell cycle arrest, genotoxic stress, and innate immunity. Comparison to analogous data from transformed cell lines revealed respiratory-specific processes hijacked by SARS-CoV-2, highlighting potential novel therapeutic avenues that were validated by a high hit rate in a targeted small molecule screen in our iAT2 ALI system.
| Original language | English |
|---|---|
| Pages (from-to) | 1104-1122.e9 |
| Journal | Molecular Cell |
| Volume | 80 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 17 2020 |
Keywords
- COVID-19
- SARS-CoV-2
- antivirals
- infection
- mass spectrometry
- pathogenesis
- pathways
- phosphoproteomics
- pneumocytes
- time course
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