Our in vitro experiments on HER+ cells suggested that miR-429 has a role in controlling cell proliferation (MTT assay), possibly via Cyclin-dependent kinase 4 (CDK4) as in colorectal cancer 41, and confirmed also that miR-429 is involved in migration and invasion (wound healing and Boyden's chamber tests, respectively). The gene discussed is CDK4; the disease is colorectal cancer.