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Related Experiment Videos

Interconnection between thyroid hormone signalling pathways and parvovirus cytotoxic functions

J M Vanacker1, V Laudet, G Adelmant

  • 1Unité d'Oncologie Moléculaire, Institut Pasteur de Lille, Centre National de la Recherche Scientifique URA 1160, France.

Journal of Virology
|December 1, 1993
PubMed
Summary

Minute virus of mice nonstructural protein 1 (NS-1) activates the human c-erbA1 gene promoter, suggesting a link between thyroid hormone (T3) signaling and parvovirus cytotoxicity. T3 also increases cell susceptibility to parvovirus infection.

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Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Autonomous parvoviruses encode nonstructural (NS) proteins that can repress heterologous promoter expression.
  • This NS protein activity has been inseparable from their cytotoxic effects.

Purpose of the Study:

  • To investigate the interaction between parvovirus NS proteins and host cell gene promoters.
  • To determine if the NS-1 protein of minute virus of mice (MVMp) affects the human c-erbA1 gene promoter.
  • To explore the role of thyroid hormone (T3) signaling in parvovirus infection.

Main Methods:

  • Transient transfection assays to assess promoter activity.
  • MVMp infection of cells to study endogenous gene promoter regulation.
  • Analysis of cell sensitivity to parvovirus following T3 modulation.

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Main Results:

  • MVMp NS-1 protein activates the promoter of the human c-erbA1 gene, which encodes the thyroid hormone (T3) receptor alpha.
  • The endogenous c-erbA1 promoter is induced upon MVMp infection.
  • T3 up-modulates cellular sensitivity to parvovirus infection.

Conclusions:

  • The NS-1 protein's interaction with the c-erbA1 promoter is a novel finding, separating its transcriptional activity from cytotoxicity.
  • These data reveal an interconnection between T3 signaling pathways and parvovirus NS protein-mediated cytotoxic effects.
  • T3 signaling may influence host cell susceptibility to parvovirus, highlighting a potential new avenue for therapeutic intervention.