GABPB1 and cancer: Consistently, in ATC‐ and PTC‐derived cell lines, inhibiting GABPA or GABPB1 expression indeed leads to substantial downregulation at levels of TERT mRNA and telomerase activity; however, the GABPA/GABPB1 knock‐down had similar inhibitory effects on TERT transcription in TC and other cancer cells harbouring a WT TERT promoter.23, 24, 25