Abstract:
:Human papillomaviruses (HPVs) infect epithelial cells and are associated with genital carcinoma. Most epithelial cell lines express cell-surface glycosaminoglycans (GAGs) usually found attached to the protein core of proteoglycans. Our aim was to study how GAGs influenced HPV entry. Using a human keratinocyte cell line (HaCaT), preincubation of HPV virus-like particles (VLPs) with GAGs showed a dose-dependent inhibition of binding. The IC(50) (50% inhibition) was only 0.5 microg/ml for heparin, 1 microg/ml for dextran sulfate, and 5-10 microg/ml for heparan sulfate from mucosal origin. Mutated chinese hamster ovary (CHO) cell lines lacking heparan sulfate or all GAGs were unable to bind HPV VLPs. Here we also report a method to study internalization by using VLPs labeled with carboxy-fluorescein diacetate, succinimidyl ester, a fluorochrome that is only activated after cell entry. Pretreatment of labeled HPV VLPs with heparin inhibited uptake, suggesting a primary interaction between HPV and cell-surface heparan sulfate.
journal_name
Virologyjournal_title
Virologyauthors
Drobni P,Mistry N,McMillan N,Evander Mdoi
10.1016/s0042-6822(03)00114-4subject
Has Abstractpub_date
2003-05-25 00:00:00pages
163-72issue
1eissn
0042-6822issn
1096-0341pii
S0042682203001144journal_volume
310pub_type
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