Fig. 5
LIF regulates focal adhesion molecules. a Detection of endogenous focal adhesion kinases in cancer cells via western blot using GAPDH as a loading control. b LIF regulates the spatial distribution of activated focal adhesion kinases. Cells were labeled with antibodies against phospho-PXN (Y118) or phospho-FAK (Y397). Alexa Fluor 488 phalloidin (green) was used to stain F-actin. Blue, nuclear staining. Scale bars, 10 μm. c Live imaging of focal adhesion during transendothelial invasion. Cancer cells expressing LifeAct-RFP were pre-labeled with Talin-GFP and plated onto the HUVEC layer. Images were captured 24 h post-plating. Blue, nuclei labeled with Hoechst33342. Scale bars, 20 μm. The white arrow indicates the damaged area caused by Talin-rich elongated protrusion. d Representative images of LIF, p-PXN (Y118), and p-FAK (Y397) expression in paraffin-embedded consecutive NPC tissue sections. Scale bars, 50 μm. e, f Correlation analyses based on IHC scores (Spearman’s correlation test). Correlations were evident between LIF and p-FAK (Y397) (e) and LIF and p-PXN (Y118) (f)
