CDK6 and lung cancer: In order to further determine whether miR-34a overexpression could inhibit cell proliferation and cause cell apoptosis via suppressing CDK6 gene expression in Xuanwei and Gejiu lung cancer, the protein and mRNA expression levels of CDK6 were examined in XWLC-05 and YTMLC-90 cells following vector-mediated miR-34a transfection.