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2015 ; 126
(25
): 2658-9
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The Rap1-RIAM pathway prefers ?2 integrins
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Calderwood DA
Blood
2015[Dec]; 126
(25
): 2658-9
PMID26679542
show ga
In vitro studies strongly implicate the talin-binding Ras-related protein 1
(Rap1) effector, Rap1-guanosine triphosphate?interacting adapter molecule (RIAM),
in integrin activation. Yet, the RIAM knockout mouse is viable and fertile and
exhibits no platelet adhesion or aggregation defects, casting doubt on the in
vivo role of RIAM. In this issue of Blood, Su et al and Klapproth et al now show
that RIAM is required for ?2 integrin?dependent leukocyte adhesion and
trafficking in vitro and in vivo, but apparently not for all Rap- and
talin-meditated activation of ?1 and ?3 integrins.
|Adaptor Proteins, Signal Transducing/*immunology/*metabolism
[MESH]