Senescence Induced by BMI1 Inhibition Is a Therapeutic Vulnerability in H3K27M-Mutant DIPG

Diffuse intrinsic pontine glioma (DIPG) is an incurable brain tumor of childhood characterized by histone mutations at lysine 27, which results in epigenomic dysregulation. There has been a failure to develop effective treatment for this tumor. Using a combined RNAi and chemical screen targeting epi...

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Detalles Bibliográficos
Autores principales: Balakrishnan, Ilango, Danis, Etienne, Pierce, Angela, Madhavan, Krishna, Wang, Dong, Dahl, Nathan, Sanford, Bridget, Birks, Diane K., Davidson, Nate, Metselaar, Dennis S., Meel, Michaël Hananja, Lemma, Rakeb, Donson, Andrew, Vijmasi, Trinka, Katagi, Hiroaki, Sola, Ismail, Fosmire, Susan, Alimova, Irina, Steiner, Jenna, Gilani, Ahmed, Hulleman, Esther, Serkova, Natalie J., Hashizume, Rintaro, Hawkins, Cynthia, Carcaboso, Angel M., Gupta, Nalin, Monje, Michelle, Jabado, Nada, Jones, Kenneth, Foreman, Nicholas, Green, Adam, Vibhakar, Rajeev, Venkataraman, Sujatha
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cell Press 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7574900/
https://www.ncbi.nlm.nih.gov/pubmed/33086074
http://dx.doi.org/10.1016/j.celrep.2020.108286
Descripción
Sumario:Diffuse intrinsic pontine glioma (DIPG) is an incurable brain tumor of childhood characterized by histone mutations at lysine 27, which results in epigenomic dysregulation. There has been a failure to develop effective treatment for this tumor. Using a combined RNAi and chemical screen targeting epigenomic regulators, we identify the polycomb repressive complex 1 (PRC1) component BMI1 as a critical factor for DIPG tumor maintenance in vivo. BMI1 chromatin occupancy is enriched at genes associated with differentiation and tumor suppressors in DIPG cells. Inhibition of BMI1 decreases cell self-renewal and attenuates tumor growth due to induction of senescence. Prolonged BMI1 inhibition induces a senescence-associated secretory phenotype, which promotes tumor recurrence. Clearance of senescent cells using BH3 protein mimetics co-operates with BMI1 inhibition to enhance tumor cell killing in vivo.

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