TY - JOUR
T1 - An inhibitory role for FAK in regulating proliferation
T2 - A link between limited adhesion and RhoA-ROCK signaling
AU - Pirone, Dana M.
AU - Liu, Wendy F.
AU - Ruiz, Sami Alom
AU - Gao, Lin
AU - Raghavan, Srivatsan
AU - Lemmon, Christopher A.
AU - Romer, Lewis H.
AU - Chen, Christopher S.
PY - 2006/7/17
Y1 - 2006/7/17
N2 - Focal adhesion kinase (FAK) transduces cell adhesion to the extracellular matrix into proliferative signals. We show that FAK overexpression induced proliferation in endothelial cells, which are normally growth arrested by limited adhesion. Interestingly, displacement of FAK from adhesions by using a FAK-/- cell line or by expressing the C-terminal fragment FRNK also caused an escape of adhesion-regulated growth arrest, suggesting dual positive and negative roles for FAK in growth regulation. Expressing kinase-dead FAK-Y397F in FAK-/- cells prevented uncontrolled growth, demonstrating the antiproliferative function of inactive FAK. Unlike FAK overexpression-induced growth, loss of growth control in FAK-/- or FRNK-expressing cells increased RhoA activity, cytoskeletal tension, and focal adhesion formation. ROCK inhibition rescued adhesion-dependent growth control in these cells, and expression of constitutively active RhoA or ROCK dysregulated growth. These findings demonstrate the ability of FAK to suppress and promote growth, and underscore the importance of multiple mechanisms, even from one molecule, to control cell proliferation.
AB - Focal adhesion kinase (FAK) transduces cell adhesion to the extracellular matrix into proliferative signals. We show that FAK overexpression induced proliferation in endothelial cells, which are normally growth arrested by limited adhesion. Interestingly, displacement of FAK from adhesions by using a FAK-/- cell line or by expressing the C-terminal fragment FRNK also caused an escape of adhesion-regulated growth arrest, suggesting dual positive and negative roles for FAK in growth regulation. Expressing kinase-dead FAK-Y397F in FAK-/- cells prevented uncontrolled growth, demonstrating the antiproliferative function of inactive FAK. Unlike FAK overexpression-induced growth, loss of growth control in FAK-/- or FRNK-expressing cells increased RhoA activity, cytoskeletal tension, and focal adhesion formation. ROCK inhibition rescued adhesion-dependent growth control in these cells, and expression of constitutively active RhoA or ROCK dysregulated growth. These findings demonstrate the ability of FAK to suppress and promote growth, and underscore the importance of multiple mechanisms, even from one molecule, to control cell proliferation.
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U2 - 10.1083/jcb.200510062
DO - 10.1083/jcb.200510062
M3 - Article
C2 - 16847103
AN - SCOPUS:33746031475
SN - 0021-9525
VL - 174
SP - 277
EP - 288
JO - Journal of Cell Biology
JF - Journal of Cell Biology
IS - 2
ER -