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Updated: May 5, 2026

Merkel Cell Polyomavirus Infection and Detection
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Respiratory Models Reveal DNA Damage Response Modulation by Merkel Cell Polyomavirus.

Sara Passerini1, Marta De Angelis2,3, Sara Messina1

  • 1Department of Public Health and Infectious Diseases, Sapienza University, 00185 Rome, Italy.

International Journal of Molecular Sciences
|May 4, 2026
PubMed
Summary
This summary is machine-generated.

Merkel Cell Polyomavirus (MCPyV) replicates in respiratory cells and upregulates DNA Damage Response (DDR) genes. This suggests MCPyV may influence respiratory tract cancers and viral replication.

Keywords:
DNA Damage ResponseMerkel Cell Polyomavirusoncogenesisrespiratory modelstranscriptional level

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Area of Science:

  • Virology
  • Oncology
  • Molecular Biology

Background:

  • Merkel Cell Polyomavirus (MCPyV) is linked to Merkel Cell Carcinoma (MCC).
  • Its role in the respiratory tract is debated due to MCC's similarity to lung cancer and MCPyV detection in respiratory samples.
  • MCPyV oncogenesis may involve viral antigens disrupting host DNA Damage Response (DDR) signaling.

Purpose of the Study:

  • To investigate MCPyV replication and its effect on DDR gene expression in respiratory models.
  • To establish in vitro models for studying MCPyV-DDR interactions in the respiratory tract.

Main Methods:

  • Utilized lung cancer cell lines (A549, H1299) and non-malignant bronchial cells (HBEC-KT, 2D ALI model).
  • Assessed MCPyV replication and transcription using qPCR and RT-qPCR.
  • Examined mRNA levels of key DDR genes (ATM, ATR, Chk1, Chk2, H2AX, Rad51, p53, p21).

Main Results:

  • Confirmed MCPyV replication and transcription in all tested respiratory cellular systems.
  • Demonstrated viral infection-induced overexpression of multiple DDR genes.
  • Indicated a potential role for MCPyV in manipulating DDR for viral replication or tumor progression.

Conclusions:

  • MCPyV can replicate within respiratory tract models.
  • MCPyV infection upregulates DDR genes, suggesting a mechanism for viral oncogenesis or replication.
  • These findings provide a foundation for further research into MCPyV's role in respiratory malignancies.