Abstract:
:TERT promoter mutations reactivate telomerase, allowing for indefinite telomere maintenance and enabling cellular immortalization. These mutations specifically recruit the multimeric ETS factor GABP, which can form two functionally independent transcription factor species: a dimer or a tetramer. We show that genetic disruption of GABPβ1L (β1L), a tetramer-forming isoform of GABP that is dispensable for normal development, results in TERT silencing in a TERT promoter mutation-dependent manner. Reducing TERT expression by disrupting β1L culminates in telomere loss and cell death exclusively in TERT promoter mutant cells. Orthotopic xenografting of β1L-reduced, TERT promoter mutant glioblastoma cells rendered lower tumor burden and longer overall survival in mice. These results highlight the critical role of GABPβ1L in enabling immortality in TERT promoter mutant glioblastoma.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Mancini A,Xavier-Magalhães A,Woods WS,Nguyen KT,Amen AM,Hayes JL,Fellmann C,Gapinske M,McKinney AM,Hong C,Jones LE,Walsh KM,Bell RJA,Doudna JA,Costa BM,Song JS,Perez-Pinera P,Costello JFdoi
10.1016/j.ccell.2018.08.003subject
Has Abstractpub_date
2018-09-10 00:00:00pages
513-528.e8issue
3eissn
1535-6108issn
1878-3686pii
S1535-6108(18)30357-Xjournal_volume
34pub_type
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