To further measure the regulation of miR-320a/HIF1α/KDM5B/PTEN axis in radioresistance of NSCLC, A549, and H23 cells were stimulated with mimic NC + si-NC + 10 Gy, miR-320a mimic + si-NC + 10 Gy, and miR-320a mimic + si-PTEN + 10 Gy. The gene discussed is PTEN; the disease is non-small cell lung carcinoma.