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Age-related expression of SARS-CoV-2 priming protease TMPRSS2 in the developing lung.


ABSTRACT: The emergence of the SARS-CoV-2 novel coronavirus has led to a global pandemic (COVID-19), with more than 5 million cases as of May 20201. Available data suggest that severe illness and death from COVID-19 are rare in the pediatric population2. Integrating single-cell RNA sequencing of the developing mouse lung with temporally-resolved RNA-in-situ hybridization (ISH) in mouse and human lung tissue, we found expression of SARS-CoV-2 Spike protein primer TMPRSS2 was highest in ciliated cells and type I alveolar epithelial cells (AT1) and increased with aging in mice and humans. SARS-CoV-2 RNA colocalized with TMPRSS2 mRNA in lung cells from a patient who died of SARS-CoV-2. Together, these data suggest developmental regulation of TMPRSS2 may underlie the relative protection of infants and children from severe respiratory illness.

SUBMITTER: Schuler BA 

PROVIDER: S-EPMC7263492 | biostudies-literature |

REPOSITORIES: biostudies-literature

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