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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Genet 2020 ; 52 (12): 1294-1302 Nephropedia Template TP
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Tissue-specific and interferon-inducible expression of nonfunctional ACE2 through endogenous retroelement co-option #MMPMID33077915
Ng KW; Attig J; Bolland W; Young GR; Major J; Wrobel AG; Gamblin S; Wack A; Kassiotis G
Nat Genet 2020[Dec]; 52 (12): 1294-1302 PMID33077915show ga
Angiotensin-converting enzyme 2 (ACE2) is an entry receptor for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and a regulator of several physiological processes. ACE2 has recently been proposed to be interferon (IFN) inducible, suggesting that SARS-CoV-2 may exploit this phenomenon to enhance viral spread and questioning the efficacy of IFN treatment in coronavirus disease 2019. Using a recent de novo transcript assembly that captured previously unannotated transcripts, we describe a new isoform of ACE2, generated by co-option of intronic retroelements as promoter and alternative exon. The new transcript, termed MIRb-ACE2, exhibits specific expression patterns across the aerodigestive and gastrointestinal tracts and is highly responsive to IFN stimulation. In contrast, canonical ACE2 expression is unresponsive to IFN stimulation. Moreover, the MIRb-ACE2 translation product is a truncated, unstable ACE2 form, lacking domains required for SARS-CoV-2 binding and is therefore unlikely to contribute to or enhance viral infection.