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Updated: Sep 21, 2025
06:44
Assessment of Global DNA Double-Strand End Resection using BrdU-DNA Labeling coupled with Cell Cycle Discrimination Imaging
Published on: April 28, 2021
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Beta HPV Deregulates Double-Strand Break Repair
Changkun Hu1, Nicholas Wallace1
1Division of Biology, Kansas State University, Manhattan, KS 66506, USA.
Viruses
|May 28, 2022
Summary
Beta human papillomavirus (beta HPV) infections may promote skin cancer by disrupting DNA repair. Beta HPV E6 protein impairs double-strand break repair, increasing UV mutagenesis in skin cells.
Area of Science:
- Oncology
- Virology
- Genetics
Background:
- Beta human papillomavirus (beta HPV) infections are prevalent in adults.
- Certain beta HPV types are linked to nonmelanoma skin cancer (NMSC) in immunocompromised individuals.
Purpose of the Study:
- To investigate if beta HPV infections contribute to NMSC in immunocompetent individuals.
- To explore the mechanism by which beta HPV may increase genomic instability and UV mutagenesis.
Main Methods:
- Utilized fluorescence-based reporters, next-generation sequencing, and animal models.
- Focused on cells expressing beta HPV E6 and E7 proteins.
- Examined the impact on DNA double-strand break (DSB) repair pathways.
Main Results:
- Beta HPV E6 protein demonstrated a significant ability to increase UV mutagenesis.
- Beta HPV E6 attenuates homologous recombination and non-homologous end-joining DSB repair pathways.
- This dysregulation of DNA repair signaling is a key finding.
Conclusions:
- Beta HPV E6 plays a role in impairing cellular DNA repair mechanisms.
- This impairment may contribute to the development of NMSC, even in immunocompetent individuals.
- Further research into these repair pathway disruptions is warranted.
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