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Reverse Genetics Mediated Recovery of Infectious Murine Norovirus
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Genomics and Marek's disease virus.

J Burnside1, R W Morgan

  • 1Department of Animal and Food Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA. joan@udel.edu

Cytogenetic and Genome Research
|August 7, 2007
PubMed
Summary

Marek's disease virus (MDV) infection in chickens involves complex gene regulation. Researchers identified novel microRNAs (miRNAs) encoded by MDV, suggesting a significant role in the pathogenesis of this economically important avian disease.

Area of Science:

  • Virology
  • Genomics
  • Molecular Biology

Background:

  • Marek's disease virus (MDV) causes significant economic losses in the poultry industry due to tumors, immunosuppression, and neurological issues in chickens.
  • Recent advancements in chicken genomics provide tools to study MDV and its host interactions.
  • MicroRNAs (miRNAs) are small regulatory molecules known to influence gene expression in various organisms, including viruses.

Purpose of the Study:

  • To identify host genes regulated by MDV infection using microarrays.
  • To investigate the presence and location of MDV-encoded miRNAs.
  • To understand the potential role of these viral miRNAs in MDV pathogenesis.

Main Methods:

  • Construction and application of microarrays to identify up-regulated host genes in MDV-infected chicken embryo fibroblasts.

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  • Bioinformatic analysis and sequencing to identify and catalog MDV-encoded miRNAs.
  • Comparative sequence analysis of identified miRNAs with known viral miRNAs.

    • Main Results:

    • Microarray analysis revealed host genes that are up-regulated in response to MDV infection.
    • Novel MDV-encoded miRNAs were identified, with clusters located near the meq oncogene and the latency associated transcript (LAT) region.
    • The identified miRNA sequences show conservation, suggesting functional importance.

    Conclusions:

    • MDV utilizes miRNAs as a mechanism for gene regulation during infection.
    • The identified MDV miRNAs, particularly those near the meq oncogene and LAT region, are likely involved in the virus's pathogenesis.
    • Further research into these viral miRNAs is warranted to fully understand their role in Marek's disease.