Birefringence imaging directly reveals architectural dynamics of filamentous actin in living growth cones


Katoh, Kaoru, Hammar, Katherine, Smith, Peter J.S. and Oldenbourg, Rudolf (1999) Birefringence imaging directly reveals architectural dynamics of filamentous actin in living growth cones Molecular Biology of the Cell, 10, (1), pp. 197-210. (PMID:8900961).

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Description/Abstract

We have investigated the dynamic behavior of cytoskeletal fine structure in the lamellipodium of nerve growth cones using a new type of polarized light microscope (the Pol-Scope). Pol-Scope images display with exquisite resolution and definition birefringent fine structures, such as filaments and membranes, without having to treat the cell with exogenous dyes or fluorescent labels. Furthermore, the measured birefringence of protein fibers in the thin lamellipodial region can be interpreted in terms of the number of filaments in the bundles. We confirmed that birefringent fibers are actin-based using conventional fluorescence-labeling methods. By recording movies of time-lapsed Pol-Scope images, we analyzed the creation and dynamic composition of radial fibers, filopodia, and intrapodia in advancing growth cones. The strictly quantitative information available in time-lapsed Pol-Scope images confirms previously deduced behavior and provides new insight into the architectural dynamics of filamentous actin.

Item Type: Article
ISSNs: 1059-1524 (print)
Related URLs:
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QR Microbiology
ePrint ID: 190241
Date :
Date Event
January 1999Published
Date Deposited: 17 Jun 2011 13:17
Last Modified: 18 Apr 2017 02:00
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/190241

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