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

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Version: Final published version
License: CC BY 4.0
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
Published
Issued date
05/2024
Peer-reviewed
Oui
Volume
18
Number
5
Pages
1189-1208
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Human papillomavirus (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 topologically associating domains (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 (~ 500 kb apart), leading to allele-specific overexpression. Based on these, we propose HPV integrations can trigger multimodal oncogenic activation to promote cancer progression.
Keywords
Humans, Uterine Cervical Neoplasms/virology, Uterine Cervical Neoplasms/genetics, Uterine Cervical Neoplasms/pathology, Uterine Cervical Neoplasms/metabolism, Chromatin/metabolism, Chromatin/genetics, Virus Integration/genetics, Female, HeLa Cells, Gene Expression Regulation, Neoplastic, Papillomaviridae/genetics, Papillomavirus Infections/genetics, Papillomavirus Infections/virology, Papillomavirus Infections/pathology, Papillomavirus Infections/metabolism, Papillomavirus Infections/complications, Oncogenes/genetics, HPV integration, cervical cancer, chromatin structure, gene‐regulation, topologically associating domains
Pubmed
Web of science
Open Access
Yes
Create date
01/12/2023 8:49
Last modification date
11/05/2024 8:06
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