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

Open Biology - Tập 5 Số 8 - Trang 150041 - 2015
Gareth L. Evans1, Laura Caller2, Victoria Foster3, Colin M. Crump4
1Gareth L. Evans Google Scholar Find this author on PubMed
2Laura G. Caller Google Scholar Find this author on PubMed
3Victoria Foster Google Scholar Find this author on PubMed
4Colin M. Crump [email protected] Google Scholar Find this author on PubMed

Tóm tắt

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.

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