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Título: | Fascin, may the Forked be with you |
Autor: | Okenve-Ramos, Pilar CSIC ORCID; Llimargas, Marta CSIC ORCID | Palabras clave: | Actinbundling Drosophila morphogenesis Espin Fascin FGFR pathway Filopodia Forked Parallel actin bundles (PABs) Tracheal system development |
Fecha de publicación: | 31-oct-2014 | Editor: | Taylor & Francis Landes Bioscience |
Citación: | Fly 8(3): 157-164 (2014) | Resumen: | © 2014 Taylor & Francis Group, LLC. The FGFR pathway triggers a wide range of key biological responses. Among others, the Breathless (Btl, Drosophila FGFR1) receptor cascade promotes cell migration during embryonic tracheal system development. However, how the actin cytoskeleton responds to Btl pathway activation to induce cell migration has remained largely unclear. Our recent results shed light into this issue by unveiling a link between the actin-bundling protein Singed (Sn) and the Btl pathway. We showed that the Btl pathway regulates sn, which leads to the stabilization of the actin bundles required for filopodia formation and actin cytoskeleton rearrangement. This regulation contributes to tracheal migration, tracheal branch fusion and tracheal cell elongation. Parallel actin bundles (PABs) are usually cross-linked by more than one actin-bundling protein. Accordingly, we have also shown that sn synergistically interacts with forked (f), another actin crosslinker. In this Extra View we extend f analysis and hypothesize how both actin-bundling proteins may act together to regulate the PABs during tracheal embryonic development. Although both proteins are required for similar tracheal events, we suggest that Sn is essential for actin bundle initiation and stiffening, while F is required for the lengthening and further stabilization of the PABs. | Versión del editor: | http://dx.doi.org/10.4161/fly.34368 | URI: | http://hdl.handle.net/10261/124257 | DOI: | 10.4161/fly.34368 | Identificadores: | doi: 10.4161/fly.34368 issn: 1933-6942 |
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