DOI: 10.1083/jcb.138.6.1279. Delayed Retraction of Filopodia in Gelsolin Null Mice

Delayed Retraction of Filopodia in Gelsolin Null Mice

10.1083/jcb.138.6.1279

Crossref journal-article

Rockefeller University Press

The Journal of Cell Biology (291)

Abstract

Growth cones extend dynamic protrusions called filopodia and lamellipodia as exploratory probes that signal the direction of neurite growth. Gelsolin, as an actin filament-severing protein, may serve an important role in the rapid shape changes associated with growth cone structures. In wild-type (wt) hippocampal neurons, antibodies against gelsolin labeled the neurite shaft and growth cone. The behavior of filopodia in cultured hippocampal neurons from embryonic day 17 wt and gelsolin null (Gsn−) mice (Witke, W., A.H. Sharpe, J.H. Hartwig, T. Azuma, T.P. Stossel, and D.J. Kwiatkowski. 1995. Cell. 81:41–51.) was recorded with time-lapse video microscopy. The number of filopodia along the neurites was significantly greater in Gsn− mice and gave the neurites a studded appearance. Dynamic studies suggested that most of these filopodia were formed from the region of the growth cone and remained as protrusions from the newly consolidated shaft after the growth cone advanced. Histories of individual filopodia in Gsn− mice revealed elongation rates that did not differ from controls but an impaired retraction phase that probably accounted for the increased number of filopodia long the neutrite shaft. Gelsolin appears to function in the initiation of filopodial retraction and in its smooth progression.

Bibliography

Lu, M., Witke, W., Kwiatkowski, D. J., & Kosik, K. S. (1997). Delayed Retraction of Filopodia in Gelsolin Null Mice. The Journal of Cell Biology, 138(6), 1279â1287.

Authors 4

Mei Lu (first)
Walter Witke (additional)
David J. Kwiatkowski (additional)
Kenneth S. Kosik (additional)

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 12:47 p.m.)
Deposited	2 years, 1 month ago (July 22, 2023, 3:21 a.m.)
Indexed	2 months ago (July 1, 2025, 5:27 a.m.)
Issued	27 years, 11 months ago (Sept. 22, 1997)
Published	27 years, 11 months ago (Sept. 22, 1997)
Published Online	27 years, 11 months ago (Sept. 22, 1997)
Published Print	27 years, 11 months ago (Sept. 22, 1997)

Funders 0

None

BibTeX

@article{Lu_1997, title={Delayed Retraction of Filopodia in Gelsolin Null Mice}, volume={138}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.138.6.1279}, DOI={10.1083/jcb.138.6.1279}, number={6}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Lu, Mei and Witke, Walter and Kwiatkowski, David J. and Kosik, Kenneth S.}, year={1997}, month=sep, pages={1279–1287} }

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