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PLoS Pathog. 2008 Sep 5;4(9):e1000148. doi: 10.1371/journal.ppat.1000148.

Human papillomavirus type 16 entry: retrograde cell surface transport along actin-rich protrusions.

Author information

1
Institute of Biochemistry, ETH Zurich, Zurich, Switzerland.

Abstract

The lateral mobility of individual, incoming human papillomavirus type 16 pseudoviruses (PsV) bound to live HeLa cells was studied by single particle tracking using fluorescence video microscopy. The trajectories were computationally analyzed in terms of diffusion rate and mode of motion as described by the moment scaling spectrum. Four distinct modes of mobility were seen: confined movement in small zones (30-60 nm in diameter), confined movement with a slow drift, fast random motion with transient confinement, and linear, directed movement for long distances. The directed movement was most prominent on actin-rich cell protrusions such as filopodia or retraction fibres, where the rate was similar to that measured for actin retrograde flow. It was, moreover, sensitive to perturbants of actin retrograde flow such as cytochalasin D, jasplakinolide, and blebbistatin. We found that transport along actin protrusions significantly enhanced HPV-16 infection in sparse tissue culture, cells suggesting a role for in vivo infection of basal keratinocytes during wound healing.

PMID:
18773072
PMCID:
PMC2518865
DOI:
10.1371/journal.ppat.1000148
[Indexed for MEDLINE]
Free PMC Article

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