Figure 4. Fibronectin adhesion to integrin α5β1 induces FAK phosphorylation.
(a) Phospho-FAK immunostainings of UW_BCC_T2 and ASZ_001 on poly-L-lysine or fibronectin.
(b) Phospho-FAK immunostainings of UW_BCC_T2 and ASZ_001 on fibronectin treated with DMSO or K34C.
(c) Phospho-FAK immunostainings of UW_BCC_T2 on fibronectin treated with isotype (control) or P1D6 antibodies.
(d) Quantification of membranous phospho-FAK shown in (b) and (c).
(e) Western blots for phospho(Y397)- and total-FAK in UW_BCC_T2 and ASZ_001 on fibronectin treated with DMSO or K34C, and UW_BCC_T2 on fibronectin treated with isotype (control) or P1D6 antibodies.
(f) Phospho-FAK stainings and quantification in nodular- compared to infiltrative-like areas of UW_BCC_T2 tumors injected with TGFβ. Scale bars indicate 100μm.
White arrowheads indicate membranous phospho-FAK. Scale bars indicate 20μm (unless specified). Columns and error bars represent the mean ± SD for n ≥ 3 per group. *p < 0.05, **p < 0.01 and ***p < 0.001.