Table 1

Effects of endorepellin on tyrosine phosphorylation of various tyrosine kinase receptors in human endothelial cells

ReceptorEndorepellin-evoked Tyr phosphorylation over controls*PAnti-α2β1 + endorepellinPReported function
EGFR 0.328 ± 0.017 < .001 1.10 ± 0.23 .505 Migration, proliferation 
EphA2 0.144 ± 0.056 < .001 0.95 ± 0.08 .899 Guidance of cell migration 
MSP-R 0.422 ± 0.16 .035 1.16 ± 0.04 .885 Migration, proliferation, tubular morphogenesis 
c-Ret 0.270 ± 0.096 .017 0.99 ± 0.16 .829 Survival, proliferation 
ROR2 0.207 ± 0.073 .008 1.51 ± 0.34 .232 Growth 
Tie2 0.212 ± 0.063 .001 1.13 ± 0.15 .712 Promotion of angiogenesis 
VEGFR1 0.521 ± 0.029 < .001 1.19 ± 0.20 .606 Migration, proliferation, tubular morphogenesis 
VEGFR2 0.441 ± 0.036 < .001 1.08 ± 0.18 .932 Migration, proliferation, tubular morphogenesis 
ReceptorEndorepellin-evoked Tyr phosphorylation over controls*PAnti-α2β1 + endorepellinPReported function
EGFR 0.328 ± 0.017 < .001 1.10 ± 0.23 .505 Migration, proliferation 
EphA2 0.144 ± 0.056 < .001 0.95 ± 0.08 .899 Guidance of cell migration 
MSP-R 0.422 ± 0.16 .035 1.16 ± 0.04 .885 Migration, proliferation, tubular morphogenesis 
c-Ret 0.270 ± 0.096 .017 0.99 ± 0.16 .829 Survival, proliferation 
ROR2 0.207 ± 0.073 .008 1.51 ± 0.34 .232 Growth 
Tie2 0.212 ± 0.063 .001 1.13 ± 0.15 .712 Promotion of angiogenesis 
VEGFR1 0.521 ± 0.029 < .001 1.19 ± 0.20 .606 Migration, proliferation, tubular morphogenesis 
VEGFR2 0.441 ± 0.036 < .001 1.08 ± 0.18 .932 Migration, proliferation, tubular morphogenesis 
*

The values represent the relative levels of the phosphorylation status of individual tyrosine kinase receptors (mean ± SEM) evoked by a 5-minute treatment with endorepellin compared with vehicle-treated HUVECs (n ≥ 4). P values were calculated with the Student t test.

The values represent the phosphorylation status of individual tyrosine kinase receptors (mean ± SEM) after coincubation with a function-blocking antibody (mAb 1998z directed toward the α2 subunit of the α2β1 integrin) and endorepellin compared with vehicle-treated HUVECs (n ≥ 4). P values were calculated with the Student t test.

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