SARS-CoV-2 infection of kidney tissues in some severe and fatal cases of COVID-19.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can lead to diverse clinical manifestations and pathologies that involve multiple organs. Even though the disease severity is manifested mainly in the respiratory tract, which is the primary target of SARS-CoV-2 infection, acute kidney injury in the form of acute tubular necrosis has also been noted in some COVID-19 cases. It is not entirely clear whether renal cells can be infected by the virus that might be involved in acute kidney disorder. In a recent publication by Radovic and colleagues, that has been selected as the editor's choice paper published in the Journal of Medical Virology, the authors provided strong histopathological and immunofluorescence evidence of SARS-CoV-2 infection and tissue injury of renal parenchymal and tubular epithelial cells, which strongly suggest an active viral replication in the kidney of some severe and fatal COVID-19 cases, and to a lesser extent, a potential role for innate immune cells in viral infection and renal disease pathogenesis.