FAK-heterozygous mice display enhanced tumour angiogenesis.

FAK-heterozygous mice display enhanced tumour angiogenesis.
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DOI:
10.1038/ncomms3020
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发表时间:
2013
影响因子:
16.6
通讯作者:
Hodivala-Dilke K
Hodivala-Dilke K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kostourou V;Lechertier T;Reynolds LE;Lees DM;Baker M;Jones DT;Tavora B;Ramjaun AR;Birdsey GM;Robinson SD;Parsons M;Randi AM;Hart IR;Hodivala-Dilke K

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Genetic ablation of endothelial Focal Adhesion Kinase (FAK) can inhibit pathological angiogenesis, suggesting that loss of endothelial FAK is sufficient to reduce neovascularisation. Here we show that reduced stromal-FAK expression in FAK-heterozygous mice unexpectedly enhances both B16F0 and CMT19T tumour growth and angiogenesis. We further demonstrate that cell proliferation and microvessel sprouting, but not migration, are increased in serum-stimulated FAK-heterozygous endothelial cells. FAK-heterozygous endothelial cells display an imbalance in FAK phosphorylation at pY397 and pY861 without changes in Pyk2 or Erk1/2 activity. By contrast, serum-stimulated phosphorylation of Akt is enhanced in FAK-heterozygous endothelial cells and these cells are more sensitive to Akt inhibition. Additionally, low doses of a pharmacological FAK inhibitor, although too low to affect FAK autophosphorylation in vitro, can enhance angiogenesis ex vivo and tumor growth in vivo. Our results highlight a potential novel role for FAK as a non-linear, dose-dependent regulator of angiogenesis where heterozygous levels of FAK enhance angiogenesis.
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