ERCC2 and neoplasm: 34 days later, large tumors were observed in the control and vehicle groups, the tumor volume was minimal in those mice transplanted with the XPD overexpression cells and was maximal in mice transplanted with the miR-29a-3p antagomiR cells, but reduced tumor volume was observed in the XPD overexpression + miR-29a-3p antagomiR group (Fig. 8a).