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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cell+Biol
2015 ; 210
(6
): 1013-31
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English Wikipedia
?5?1 integrin recycling promotes Arp2/3-independent cancer cell invasion via the
formin FHOD3
#MMPMID26370503
Paul NR
; Allen JL
; Chapman A
; Morlan-Mairal M
; Zindy E
; Jacquemet G
; Fernandez del Ama L
; Ferizovic N
; Green DM
; Howe JD
; Ehler E
; Hurlstone A
; Caswell PT
J Cell Biol
2015[Sep]; 210
(6
): 1013-31
PMID26370503
show ga
Invasive migration in 3D extracellular matrix (ECM) is crucial to cancer
metastasis, yet little is known of the molecular mechanisms that drive
reorganization of the cytoskeleton as cancer cells disseminate in vivo. 2D
Rac-driven lamellipodial migration is well understood, but how these features
apply to 3D migration is not clear. We find that lamellipodia-like protrusions
and retrograde actin flow are indeed observed in cells moving in 3D ECM. However,
Rab-coupling protein (RCP)-driven endocytic recycling of ?5?1 integrin enhances
invasive migration of cancer cells into fibronectin-rich 3D ECM, driven by RhoA
and filopodial spike-based protrusions, not lamellipodia. Furthermore, we show
that actin spike protrusions are Arp2/3-independent. Dynamic actin spike assembly
in cells invading in vitro and in vivo is regulated by Formin homology-2 domain
containing 3 (FHOD3), which is activated by RhoA/ROCK, establishing a novel
mechanism through which the RCP-?5?1 pathway reprograms the actin cytoskeleton to
promote invasive migration and local invasion in vivo.
|*Cell Movement
[MESH]
|*Signal Transduction
[MESH]
|Actin-Related Protein 2/genetics/*metabolism
[MESH]
|Actin-Related Protein 3/genetics/*metabolism
[MESH]
|Actins/metabolism
[MESH]
|Adaptor Proteins, Signal Transducing/metabolism
[MESH]