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. 1981 Feb;78(2):912–916. doi: 10.1073/pnas.78.2.912

Early events in herpes simplex virus type 1 infection: photosensitivity of fluorescein isothiocyanate-treated virions.

N DeLuca, D Bzik, S Person, W Snipes
PMCID: PMC319914  PMID: 6262783

Abstract

Herpes simplex virus type 1 is photosensitized by treatment with fluorescein isothiocyante (FITC). The inactivation of FITC-treated virions upon subsequent exposure to light is inhibited by the presence of sodium azide, suggesting the involvement of singlet oxygen in the process. Sodium dodecyl sulfate/polyacrylamide gel electrophoresis revealed that treatment with FITC plus light induces crosslinks in viral envelope glycoproteins. Treatment of virions with high concentrations of FITC (50 micrograms/ml) plus light causes a reduction in the adsorption of the virus to monolayers of human embryonic lung cells. For lower concentrations of FITC (10 micrograms/ml) plus light, treated virions adsorb to the host cells, but remain sensitive to light until entry occurs. The loss of light sensitivity coincides with the development of resistance to antibodies. These results are most consistent with a mechanism of entry for herpes simplex virus involving fusion of the viral membrane with the plasma membrane of the host cell.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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