NRP1 and non-small cell lung carcinoma: Immunoblotting studies were performed to assess the modulation of VEGFR-2 and NP-1 protein expression in wild-type EGFR NSCLC cells (H2170-P/ER and H358-P/ER), TKI-sensitive EGFR L858R-mutant NSCLC cells (H3255), and TKI-resistant EGFR L858R- and T790M-mutant NSCLC cells (H1975).