Abstract
ABSTRACT Herpes simplex virus (HSV) reactivates from latency in the neurons of dorsal root ganglia (DRG) and is subsequently transported anterogradely along the axon to be shed at the skin or mucosa. Although we have previously shown that only unenveloped nucleocapsids are present in axons during anterograde transport, the mode of transport of tegument proteins and glycoproteins is not known. We used a two-chamber culture model with human fetal DRG cultivated in an inner chamber, allowing axons to grow out and penetrate an agarose barrier and interact with autologous epidermal cells in the outer chamber. After HSV infection of the DRG, anterograde transport of viral components could be examined in the axons in the outer chamber at different time points by electron and immunoelectron microscopy (IEM). In the axons, unenveloped nucleocapsids or focal collections of gold immunolabel for nucleocapsid (VP5) and/or tegument (VP16) were detected. VP5 and VP16 usually colocalized in both scanning and transmission IEM. In contrast, immunolabel for glycoproteins gB, gC, and gD was diffusely distributed in axons and was rarely associated with VP5 or VP16. In longitudinal sections of axons, immunolabel for glycoprotein was arrayed along the membranes of axonal vesicles. These findings provide evidence that in DRG axons, virus nucleocapsids coated with tegument proteins are transported separately from glycoproteins and suggest that final assembly of enveloped virus occurs at the axon terminus.
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Dates
Type | When |
---|---|
Created | 5 years, 8 months ago (Dec. 31, 2019, 1:20 p.m.) |
Deposited | 3 years, 5 months ago (March 4, 2022, 10:20 p.m.) |
Indexed | 4 months, 1 week ago (April 23, 2025, 8:48 a.m.) |
Issued | 25 years, 11 months ago (Oct. 1, 1999) |
Published | 25 years, 11 months ago (Oct. 1, 1999) |
Published Print | 25 years, 11 months ago (Oct. 1, 1999) |
@article{Holland_1999, title={Anterograde Transport of Herpes Simplex Virus Proteins in Axons of Peripheral Human Fetal Neurons: an Immunoelectron Microscopy Study}, volume={73}, ISSN={1098-5514}, url={http://dx.doi.org/10.1128/jvi.73.10.8503-8511.1999}, DOI={10.1128/jvi.73.10.8503-8511.1999}, number={10}, journal={Journal of Virology}, publisher={American Society for Microbiology}, author={Holland, David J. and Miranda-Saksena, Monica and Boadle, Ross A. and Armati, Patricia and Cunningham, Anthony L.}, year={1999}, month=oct, pages={8503–8511} }