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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell 2020 ; 183 (6): 1520-1535.e14 Nephropedia Template TP
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beta-Coronaviruses Use Lysosomes for Egress Instead of the Biosynthetic Secretory Pathway #MMPMID33157038
Ghosh S; Dellibovi-Ragheb TA; Kerviel A; Pak E; Qiu Q; Fisher M; Takvorian PM; Bleck C; Hsu VW; Fehr AR; Perlman S; Achar SR; Straus MR; Whittaker GR; de Haan CAM; Kehrl J; Altan-Bonnet G; Altan-Bonnet N
Cell 2020[Dec]; 183 (6): 1520-1535.e14 PMID33157038show ga
beta-Coronaviruses are a family of positive-strand enveloped RNA viruses that includes the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Much is known regarding their cellular entry and replication pathways, but their mode of egress remains uncertain. Using imaging methodologies and virus-specific reporters, we demonstrate that beta-coronaviruses utilize lysosomal trafficking for egress rather than the biosynthetic secretory pathway more commonly used by other enveloped viruses. This unconventional egress is regulated by the Arf-like small GTPase Arl8b and can be blocked by the Rab7 GTPase competitive inhibitor CID1067700. Such non-lytic release of beta-coronaviruses results in lysosome deacidification, inactivation of lysosomal degradation enzymes, and disruption of antigen presentation pathways. beta-Coronavirus-induced exploitation of lysosomal organelles for egress provides insights into the cellular and immunological abnormalities observed in patients and suggests new therapeutic modalities.