School of Mathematics and Statistics - Research Publications

Permanent URI for this collection

http://hdl.handle.net/11343/294

Filters

2018 - 2019 1 2020 - 2021 1
2
Reset filters

Settings
Statistics
Citations
Author: Allan, Rhys × Author: Coughlan, Hannah × Author: Smyth, Gordon × End date: 2023 ×

Search Results

Now showing 1 - 2 of 2
  • Item
    No Preview Available
    Targeting histone acetylation dynamics and oncogenic transcription by catalytic P300/CBP inhibition
    Hogg, SJ ; Motorna, O ; Cluse, LA ; Johanson, TM ; Coughlan, HD ; Raviram, R ; Myers, RM ; Costacurta, M ; Todorovski, I ; Pijpers, L ; Bjelosevic, S ; Williams, T ; Huskins, SN ; Kearney, CJ ; Devlin, JR ; Fan, Z ; Jabbari, JS ; Martin, BP ; Fareh, M ; Kelly, MJ ; Dupere-Richer, D ; Sandow, JJ ; Feran, B ; Knight, D ; Khong, T ; Spencer, A ; Harrison, SJ ; Gregory, G ; Wickramasinghe, VO ; Webb, A ; Taberlay, PC ; Bromberg, KD ; Lai, A ; Papenfuss, AT ; Smyth, GK ; Allan, RS ; Licht, JD ; Landau, DA ; Abdel-Wahab, O ; Shortt, J ; Vervoort, SJ ; Johnstone, RW (CELL PRESS, 2021-05-20)
    To separate causal effects of histone acetylation on chromatin accessibility and transcriptional output, we used integrated epigenomic and transcriptomic analyses following acute inhibition of major cellular lysine acetyltransferases P300 and CBP in hematological malignancies. We found that catalytic P300/CBP inhibition dynamically perturbs steady-state acetylation kinetics and suppresses oncogenic transcriptional networks in the absence of changes to chromatin accessibility. CRISPR-Cas9 screening identified NCOR1 and HDAC3 transcriptional co-repressors as the principal antagonists of P300/CBP by counteracting acetylation turnover kinetics. Finally, deacetylation of H3K27 provides nucleation sites for reciprocal methylation switching, a feature that can be exploited therapeutically by concomitant KDM6A and P300/CBP inhibition. Overall, this study indicates that the steady-state histone acetylation-methylation equilibrium functions as a molecular rheostat governing cellular transcription that is amenable to therapeutic exploitation as an anti-cancer regimen.
  • Item
    Thumbnail Image
    Genome-wide analysis reveals no evidence of trans chromosomal regulation of mammalian immune development
    Johanson, TM ; Coughlan, HD ; Lun, ATL ; Bediaga, NG ; Naselli, G ; Garnham, AL ; Harrison, LC ; Smyth, GK ; Allan, RS ; Barsh, GS (PUBLIC LIBRARY SCIENCE, 2018-06)
    It has been proposed that interactions between mammalian chromosomes, or transchromosomal interactions (also known as kissing chromosomes), regulate gene expression and cell fate determination. Here we aimed to identify novel transchromosomal interactions in immune cells by high-resolution genome-wide chromosome conformation capture. Although we readily identified stable interactions in cis, and also between centromeres and telomeres on different chromosomes, surprisingly we identified no gene regulatory transchromosomal interactions in either mouse or human cells, including previously described interactions. We suggest that advances in the chromosome conformation capture technique and the unbiased nature of this approach allow more reliable capture of interactions between chromosomes than previous methods. Overall our findings suggest that stable transchromosomal interactions that regulate gene expression are not present in mammalian immune cells and that lineage identity is governed by cis, not trans chromosomal interactions.