MicroRNAs (MiRNAs) blocking the expression of CDK6, which can inhibit the proliferation of many solid tumour cells, such as gliomas, medulloblastoma, prostate, bladder, gastric, hepatocellular and lung, suggesting that CDK6 plays an important role in the development of these tumours.16, 23, 24, 25. The gene discussed is CDK6; the disease is medulloblastoma.