Plexin signaling hampers integrin-based adhesion, leading to Rho-kinase independent cell rounding, and inhibiting lamellipodia extension and cell motility.
FASEB J
; 18(3): 592-4, 2004 Mar.
Article
en En
| MEDLINE
| ID: mdl-14734633
Plexins encode receptors for semaphorins, molecular signals guiding cell migration, and axon pathfinding. The mechanisms mediating plexin function are poorly understood. Plexin activation in adhering cells rapidly leads to retraction of cellular processes and cell rounding "cell collapse"). Here we show that, unexpectedly, this response does not require the activity of Rho-dependent kinase (ROCK) nor the contraction of F-actin cables. Interestingly, integrin-based focal adhesive structures are disassembled within minutes upon plexin activation; this is followed by actin depolymerization and, eventually, by cellular collapse. We also show that plexin activation hinders cell attachment to adhesive substrates, blocks the extension of lamellipodia, and thereby inhibits cell migration. We conclude that plexin signaling uncouples cell substrate-adhesion from cytoskeletal dynamics required for cell migration and axon extension.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Seudópodos
/
Citoesqueleto
/
Transducción de Señal
/
Antígenos CD
/
Integrinas
/
Receptores de Péptidos
/
Receptores de Superficie Celular
/
Semaforinas
/
Proteínas del Tejido Nervioso
Límite:
Animals
Idioma:
En
Revista:
FASEB J
Asunto de la revista:
BIOLOGIA
/
FISIOLOGIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
Estados Unidos