Interplay between DNA tumor viruses and the host DNA damage response

Area of Science:

• Virology
• Molecular Biology
• Oncology

Background:

• Host DNA damage response (DDR) machinery poses challenges for viral nucleic acid replication.
• DNA tumor viruses Epstein-Barr virus (EBV), Kaposi's sarcoma-associated herpesvirus (KSHV), and human papillomavirus (HPV) are linked to human cancers.
• These viruses serve as models for studying oncogenic virus-mediated cell transformation.

Purpose of the Study:

• To review how EBV, KSHV, and HPV engage and subvert host DDR pathways.
• To explore the molecular mechanisms viruses use to overcome DDR-mediated suppression.
• To understand the consequences of these interactions for viral replication and oncogenesis.

Main Methods:

• Review of existing literature on DNA tumor virus interactions with the DDR.
• Analysis of viral strategies for manipulating host cell cycle and DNA replication.
• Examination of direct detection of viral DNA by host sensors.

Main Results:

• Viruses promote cell cycle entry for replication, which can activate DDR via aberrant DNA structures.
• Viral oncoproteins are altered to subvert the growth-suppressive DDR, facilitating replication.
• Replicating viral DNA is directly detected, requiring viruses to evade these intrinsic sensors.

Conclusions:

• DNA tumor viruses employ sophisticated strategies to engage and manipulate the host DDR.
• Subversion of the DDR is essential for viral replication and contributes to oncogenesis.
• Understanding these viral-host interactions provides insights into virus-associated cancers.