TMPRSS2 and TMPRSS4 promote SARS-CoV-2 infection of human small intestinal enterocytes

Besides respiratory symptoms, diarrhea is one of the other commonly observed disease manifestations in patients with COVID-19. Zang et al. used organoid cultures of epithelial lining cells from human small and large intestine as an in vitro model system to study SARS-CoV-2 entry and replication in enterocytes. Mature enterocytes expressing the highest levels of the angiotensin-converting enzyme 2…

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