It is known to play a role in the occurrence and development of various tumors such as lung cancer [44], prostate cancer [45], etc. Besides, it has been reported that hsa-miR-636 targets cyclin-dependent kinase 6 (CDK6) and B-cell lymphoma factor 2 (Bcl-2), and can inhibit the survival of cervical cancer cells by targeting CDK6/Bcl-2 [46]. Here, CDK6 is linked to lung cancer.