Contributions of viral oncogenes of HPV-18 and hypoxia to oxidative stress and genetic damage in human keratinocytes.
Female
Humans
Human papillomavirus 18
/ genetics
Reactive Oxygen Species
/ metabolism
Oncogene Proteins, Viral
/ genetics
Oxidative Stress
/ genetics
Keratinocytes
/ metabolism
Oncogenes
Hypoxia
/ metabolism
Papillomavirus E7 Proteins
/ genetics
Uterine Cervical Neoplasms
/ pathology
Papillomavirus Infections
/ genetics
Tumor Microenvironment
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
18 10 2023
18 10 2023
Historique:
received:
17
08
2023
accepted:
12
10
2023
medline:
23
10
2023
pubmed:
19
10
2023
entrez:
18
10
2023
Statut:
epublish
Résumé
Infection with high-risk human papillomaviruses like HPV-16 and HPV-18 is highly associated with the development of cervical and other cancers. Malignant transformation requires viral oncoproteins E5, E6 and E7, which promote cell proliferation and increase DNA damage. Oxidative stress and hypoxia are also key factors in cervical malignant transformation. Increased levels of reactive species of oxygen (ROS) and nitrogen (RNS) are found in the hypoxic tumor microenvironment, promoting genetic instability and invasiveness. In this work, we studied the combined effect of E5, E6 and E7 and hypoxia in increasing oxidative stress and promoting DNA damage and nuclear architecture alterations. HaCaT cells containing HPV-18 viral oncogenes (HaCaT E5/E6/E7-18) showed higher ROS levels in normoxia and higher levels of RNS in hypoxia compared to HaCaT parental cells, as well as higher genetic damage in hypoxia as measured by γH2AX and comet assays. In hypoxia, HaCaT E5/E6/E7-18 increased its nuclear dry mass and both cell types displayed marked heterogeneity in nuclear dry mass distribution and increased nuclear foci. Our results show contributions of both viral oncogenes and hypoxia to oxidative stress, DNA damage and altered nuclear architecture, exemplifying how an altered microenvironment combines with oncogenic transformation to promote tumor progression.
Identifiants
pubmed: 37853061
doi: 10.1038/s41598-023-44880-3
pii: 10.1038/s41598-023-44880-3
pmc: PMC10584980
doi:
Substances chimiques
Reactive Oxygen Species
0
Oncogene Proteins, Viral
0
Papillomavirus E7 Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
17734Informations de copyright
© 2023. Springer Nature Limited.
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