Anion homeostasis is important for non-lytic release of BK polyomavirus from infected cells.

Gareth L Evans, Laura G Caller, Victoria Foster, Colin M Crump

Open biology 2015 Aug

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BK polyomavirus (BKPyV) is a member of a family of potentially oncogenic viruses, whose reactivation can cause severe pathological conditions in transplant patients, leading to graft rejection. As with many non-enveloped viruses, it is assumed that virus release occurs through lysis of the host cell. We now show the first evidence for a non-lytic release pathway for BKPyV and that this pathway can be blocked by the anion channel inhibitor DIDS. Our data show a dose-dependent effect of DIDS on the release of BKPyV virions. We also observed an accumulation of viral capsids in large LAMP-1-positive acidic organelles within the cytoplasm of cells upon DIDS treatment, suggesting potential late endosome or lysosome-related compartments are involved in non-lytic BKPyV release. These data highlight a novel mechanism by which polyomaviruses can be released from infected cells in an active and non-lytic manner, and that anion homeostasis regulation is important in this pathway. © 2015 The Authors.

Citation

Gareth L Evans, Laura G Caller, Victoria Foster, Colin M Crump. Anion homeostasis is important for non-lytic release of BK polyomavirus from infected cells. Open biology. 2015 Aug;5(8)