Birefringence Imaging Directly Reveals Architectural Dynamics of Filamentous Actin in Living Growth ConesV⃞
AUTOR(ES)
Katoh, Kaoru
FONTE
The American Society for Cell Biology
RESUMO
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.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=25163Documentos Relacionados
- Multiple Functions for Actin during Filamentous Growth of Saccharomyces cerevisiaeV⃞
- Apatite-mediated Actin Dynamics in Resorbing OsteoclastsV⃞
- Dynamics of a Chemoattractant Receptor in Living Neutrophils during ChemotaxisV⃞
- Quantitative Imaging of Pre-mRNA Splicing Factors in Living CellsV⃞
- Microtubules and Microscopes: How the Development of Light Microscopic Imaging Technologies Has Contributed to Discoveries about Microtubule Dynamics in Living CellsV⃞