Gefitinib treatment reduces viability in HN5, HN13, SCC61 and H400 HNSCC cell lines.
AREG, HGF, TGFβ1, IGF1, FGF1 or FGF2 impair response of tumor cells to gefitinib.
Gefitinib induces and growth factors diminish basal apoptosis in HNSCC tumor cells.
Growth factor (GF) combinations have higher impact on viability than single GFs.
Receptor expression indicates the extent of accordant ligands’ effect on viability.