Heparan Sulfate Not Essential for rAAV-2 Infection in Human Respiratory Cells
Author Information
Author(s): Michael P Boyle, Raymond A Enke, Jeffrey B Reynolds, Peter J Mogayzel Jr, William B Guggino, Pamela L Zeitlin
Primary Institution: The Johns Hopkins University School of Medicine
Hypothesis
Is cell membrane heparan sulfate necessary for efficient infection by rAAV-2?
Conclusion
The absence of cell membrane heparan sulfate leads to only a moderate decrease in susceptibility to rAAV-2 infection, especially at high multiplicities of infection.
Supporting Evidence
- Removal of heparan sulfate reduced rAAV-2 transfection efficacy by approximately one third at lower MOIs.
- At a high MOI of 1000, the effect of heparan sulfate removal on infection efficacy was minimal.
- CHO cells deficient in heparan sulfate showed only moderate decreases in susceptibility to rAAV-2 infection.
Takeaway
Even if a type of sugar on cell surfaces is missing, the virus can still get in, just not as easily. This means we might be able to use the virus to help treat diseases in the lungs.
Methodology
The study involved treating human respiratory epithelial cell lines with heparinase to remove heparan sulfate and then measuring the infection efficiency of rAAV-2 at various multiplicities of infection.
Limitations
The study was conducted on non-polarized cell populations, which may not fully represent in-vivo conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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