CCNE1 and cancer: Hence, PVT1 may share downstream effects with the amplification of CCNE1. Interestingly, CCNE1 suffered much more frequent CNA (24.6%) than CDKN2A (4.5%) in OV, whereas the opposite trend was observed in LUAD (5.8% and 19.0% for CCNE1 and CDKN2A, respectively), indicating that amplification of PVT1 may dysregulate different downstream genes, which in turn contribute to cancer development.