How Merkel Cell Polyomavirus Enters Cells
Author Information
Author(s): Rachel M. Schowalter, Diana V. Pastrana, Christopher B. Buck, Michael Imperiale
Primary Institution: National Cancer Institute, Bethesda, Maryland, United States of America
Hypothesis
What cellular receptors or co-receptors are required for the infectious entry of Merkel cell polyomavirus (MCV)?
Conclusion
MCV primarily uses glycosaminoglycans, particularly heparan sulfate, for initial attachment to cells, while sialylated glycans play a secondary role in the entry process.
Supporting Evidence
- MCV does not require sialic acid-bearing glycans for initial attachment to cells.
- Glycosaminoglycans, particularly heparan sulfate, are essential for MCV infectious entry.
- Sialylated glycans may act as a co-factor after MCV has attached to the cell.
- MCV capsids can bind to cells deficient in sialylated glycans but are resistant to transduction.
- Chondroitin sulfate was found to be a more effective inhibitor of MCV transduction than heparin.
Takeaway
MCV, a virus linked to skin cancer, attaches to cells using special sugars called glycosaminoglycans, and needs another type of sugar for the next step to enter the cell.
Methodology
The study used cultured human cell lines to investigate the binding and entry mechanisms of MCV using reporter vectors and various glycosaminoglycan treatments.
Limitations
The study primarily focused on cultured cell lines, which may not fully represent in vivo conditions.
Digital Object Identifier (DOI)
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