SARS-CoV-2 triggers DNA damage response in Vero E6 cells

Area of Science:

• Cell Biology
• Virology
• Molecular Biology

Background:

• The COVID-19 pandemic, caused by SARS-CoV-2, has led to significant global mortality.
• Long-term symptoms in recovered patients suggest profound consequences of SARS-CoV-2 infection on host cells.
• Understanding the molecular mechanisms of SARS-CoV-2 pathogenesis is crucial.

Purpose of the Study:

• To investigate the effects of SARS-CoV-2 infection on host cell DNA.
• To determine if SARS-CoV-2 triggers a DNA damage response (DDR).
• To examine the impact of SARS-CoV-2 on telomere maintenance.

Main Methods:

• Infection of African green monkey kidney cells (Vero E6) with SARS-CoV-2.
• Measurement of transcriptional upregulation of DNA damage response proteins (ATR, CHK1, H2AX).
• Assessment of TRF2 shelterin protein expression and telomere length in infected cells.

Main Results:

• SARS-CoV-2 infection induced a significant DNA damage response (DDR) in Vero E6 cells.
• Upregulation of ATR, enhanced phosphorylation of CHK1 and H2AX were observed.
• SARS-CoV-2 infection led to decreased TRF2 expression and reduced telomere length.

Conclusions:

• SARS-CoV-2 infection activates cellular DNA damage response pathways.
• The virus interferes with telomere maintenance, potentially impacting cellular integrity.
• These findings suggest SARS-CoV-2 may cause pathological consequences beyond immune responses.