Abstract
Influenza is a paradigm for understanding viral infections. As an opportunistic pathogen exploiting the cellular endocytic machinery for infection, influenza is also a valuable model system for exploring the cell's constitutive endocytic pathway. We have studied the transport, acidification, and fusion of single influenza viruses in living cells by using real-time fluorescence microscopy and have dissected individual stages of the viral entry pathway. The movement of individual viruses revealed a striking three-stage active transport process that preceded viral fusion with endosomes starting with an actin-dependent movement in the cell periphery, followed by a rapid, dynein-directed translocation to the perinuclear region, and finally an intermittent movement involving both plus- and minus-end-directed microtubule-based motilities in the perinuclear region. Surprisingly, the majority of viruses experience their initial acidification in the perinuclear region immediately following the dynein-directed rapid translocation step. This finding suggests a previously undescribed scenario of the endocytic pathway toward late endosomes: endosome maturation, including initial acidification, largely occurs in the perinuclear region.
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Dates
Type | When |
---|---|
Created | 22 years ago (Aug. 5, 2003, 1:14 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 10, 2024, 6:33 a.m.) |
Indexed | 1 day, 12 hours ago (Aug. 31, 2025, 6:15 a.m.) |
Issued | 22 years, 1 month ago (July 25, 2003) |
Published | 22 years, 1 month ago (July 25, 2003) |
Published Online | 22 years, 1 month ago (July 25, 2003) |
Published Print | 22 years ago (Aug. 5, 2003) |
@article{Lakadamyali_2003, title={Visualizing infection of individual influenza viruses}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0832269100}, DOI={10.1073/pnas.0832269100}, number={16}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Lakadamyali, Melike and Rust, Michael J. and Babcock, Hazen P. and Zhuang, Xiaowei}, year={2003}, month=jul, pages={9280–9285} }