Additionally, we researched the connections between circ_0001786, miR-34b-5p and SRSF1 in NSCLC gefitinib resistance and found that circ_0001786 regulated NSCLC gefitinib resistance through miR-34b-5p/SRSF1 axis. This evidence concerns the gene SRSF1 and non-small cell lung carcinoma.