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Acanthamoeba polyphaga mimivirus prevents amoebal encystment-mediating serine proteinase expression and circumvents

Paulo Boratto1, Jonas Dutra Albarnaz1, Gabriel Magno de Freitas Almeida1

  • 1Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Laboratório de Vírus, Belo Horizonte, MG, Brazil.

Journal of Virology
|December 19, 2014
PubMed

Insights

Acanthamoeba encystment confers resistance to Acanthamoeba polyphaga mimivirus (APMV). However, APMV infection prevents encystment by interfering with a key serine proteinase, highlighting a complex host-virus interaction.

Area of Science:

  • Microbiology
  • Virology
  • Cell Biology

Background:

  • Acanthamoeba are ubiquitous free-living amoebas.
  • Interactions between Acanthamoeba and Acanthamoeba polyphaga mimivirus (APMV) are not well understood.
  • APMV is a large DNA virus with a complex lifecycle.

Purpose of the Study:

  • To investigate the interplay between Acanthamoeba encystment and APMV infection.
  • To determine how APMV influences the Acanthamoeba encystment process.
  • To elucidate the molecular mechanisms underlying host-virus interactions.

Main Methods:

  • Amoebal culture and maintenance.
  • APMV infection assays.
  • Analysis of gene expression related to encystment.
  • Microscopy to observe cellular changes.

Main Results:

  • Amoebal encystment significantly increases resistance to APMV infection.
  • APMV infection inhibits the expression of a serine proteinase crucial for encystment.
  • Encystment can no longer be triggered in APMV-infected Acanthamoeba.
  • APMV actively manipulates host cell pathways to evade defense mechanisms.

Conclusions:

  • Acanthamoeba encystment serves as a potent defense mechanism against APMV.
  • APMV employs sophisticated strategies to subvert host cellular processes, including encystment.
  • Understanding this interaction is vital for comprehending giant virus-host dynamics.

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