Finally, to verify the interaction among lnc-GAN1, miR-26a-5p and PTEN in NSCLC tissues, we investigated PTEN expression with qRT-PCR in the 30 NSCLC tissues that already have been detected for lnc-GAN1 and miR-26a-5p. The gene discussed is GAN; the disease is non-small cell lung carcinoma.