Inhibiting EZH2 targets atypical teratoid rhabdoid tumor by triggering viral mimicry via both RNA and DNA sensing pathways.
Enhancer of Zeste Homolog 2 Protein
/ metabolism
Humans
Rhabdoid Tumor
/ genetics
SMARCB1 Protein
/ metabolism
Cell Line, Tumor
Signal Transduction
Alu Elements
/ genetics
RNA, Double-Stranded
/ metabolism
Gene Expression Regulation, Neoplastic
Mice
DNA
/ metabolism
Animals
Membrane Proteins
/ metabolism
Molecular Mimicry
Genomic Instability
Nucleotidyltransferases
/ metabolism
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
29 Oct 2024
29 Oct 2024
Historique:
received:
01
03
2023
accepted:
12
10
2024
medline:
30
10
2024
pubmed:
30
10
2024
entrez:
30
10
2024
Statut:
epublish
Résumé
Inactivating mutations in SMARCB1 confer an oncogenic dependency on EZH2 in atypical teratoid rhabdoid tumors (ATRTs), but the underlying mechanism has not been fully elucidated. We found that the sensitivity of ATRTs to EZH2 inhibition (EZH2i) is associated with the viral mimicry response. Unlike other epigenetic therapies targeting transcriptional repressors, EZH2i-induced viral mimicry is not triggered by cryptic transcription of endogenous retroelements, but rather mediated by increased expression of genes enriched for intronic inverted-repeat Alu (IR-Alu) elements. Interestingly, interferon-stimulated genes (ISGs) are highly enriched for dsRNA-forming intronic IR-Alu elements, suggesting a feedforward loop whereby these activated ISGs may reinforce dsRNA formation and viral mimicry. EZH2i also upregulates the expression of full-length LINE-1s, leading to genomic instability and cGAS/STING signaling in a process dependent on reverse transcriptase activity. Co-depletion of dsRNA sensing and cytoplasmic DNA sensing completely rescues the viral mimicry response to EZH2i in SMARCB1-deficient tumors.
Identifiants
pubmed: 39472584
doi: 10.1038/s41467-024-53515-8
pii: 10.1038/s41467-024-53515-8
doi:
Substances chimiques
Enhancer of Zeste Homolog 2 Protein
EC 2.1.1.43
EZH2 protein, human
EC 2.1.1.43
SMARCB1 Protein
0
SMARCB1 protein, human
0
RNA, Double-Stranded
0
STING1 protein, human
0
DNA
9007-49-2
Membrane Proteins
0
Nucleotidyltransferases
EC 2.7.7.-
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
9321Informations de copyright
© 2024. The Author(s).
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