Cis-regulatory effect of HPV integration is constrained by host chromatin architecture in cervical cancers.

Details

Serval ID
serval:BIB_C481A745E22C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Cis-regulatory effect of HPV integration is constrained by host chromatin architecture in cervical cancers.
Journal
Molecular oncology
Author(s)
Singh A.K., Walavalkar K., Tavernari D., Ciriello G., Notani D., Sabarinathan R.
ISSN
1878-0261 (Electronic)
ISSN-L
1574-7891
Publication state
In Press
Peer-reviewed
Oui
Language
english
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Abstract
HPV infections are the primary drivers of cervical cancers, and often HPV DNA gets integrated into the host genome. Although the oncogenic impact of HPV encoded genes is relatively well known, the cis-regulatory effect of integrated HPV DNA on host chromatin structure and gene regulation remains less understood. We investigated genome-wide patterns of HPV integrations and associated host gene expression changes in the context of host chromatin states and TADs. HPV integrations were significantly enriched in active chromatin regions and depleted in inactive ones. Interestingly, regardless of chromatin state, genomic regions flanking HPV integrations showed transcriptional upregulation. Nevertheless, upregulation (both local and long-range) was mostly confined to TADs with integration, but not affecting adjacent TADs. Few TADs showed recurrent integrations associated with overexpression of oncogenes within them (e.g. MYC, PVT1, TP63 and ERBB2) regardless of proximity. Hi-C and 4C-seq analyses in cervical cancer cell line (HeLa) demonstrated chromatin looping interactions between integrated HPV and MYC/PVT1 regions (~500kb apart), leading to allele-specific overexpression. Based on these, we propose HPV integrations can trigger multimodal oncogenic activation to promote cancer progression.
Keywords
Cervical cancer, HPV integration, chromatin structure, gene-regulation, topologically associating domains
Pubmed
Open Access
Yes
Create date
01/12/2023 9:49
Last modification date
02/12/2023 8:16
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