Protoparvovirus Interactions with the Cellular DNA Damage Response

Area of Science:

• Virology
• Molecular Biology
• Cell Biology

Background:

• Protoparvoviruses are single-stranded DNA viruses with a broad host range.
• Minute virus of mice (MVM) infection induces a sustained DNA damage response (DDR) in host cells.
• The MVM-induced DDR involves ATM kinase signaling and impacts cell cycle regulators.

Purpose of the Study:

• To review how protoparvoviruses, particularly MVM, exploit host cell machinery.
• To elucidate the mechanisms by which MVM manipulates the DNA damage response (DDR) and cell cycle.
• To understand how MVM optimizes the host nuclear environment for viral replication.

Main Methods:

• Literature review of studies on protoparvovirus infection and host cell responses.
• Analysis of molecular pathways involved in DNA damage response (DDR) and cell cycle regulation.
• Examination of viral strategies for manipulating host cell processes.

Main Results:

• MVM infection elicits a DDR dependent on ATM kinase.
• This DDR results in a cell cycle block prior to mitosis.
• Key events include ATR-kinase signaling inactivation, p21 degradation, and inhibited cyclin B1 expression.

Conclusions:

• Protoparvoviruses co-opt host DDR and cell cycle mechanisms for their benefit.
• Viral manipulation of these pathways facilitates productive infection.
• Understanding these interactions offers insights into viral pathogenesis and host-pathogen dynamics.