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  11. Comprehensive Elucidation Of The Role Of L And 2a Security Proteins On Cell Death During Emcv Infection

Comprehensive Elucidation of the Role of L and 2A Security Proteins on Cell Death during EMCV Infection

Yury Ivin1, Anna Butusova1, Ekaterina Gladneva1

  • 1FSASI "M.P. Chumakov Federal Scientific Center for Research and Development of Immunobiological Drugs of the Russian Academy of Sciences (Polio Institute)", 118819 Moscow, Russia.

Viruses
|February 24, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

The EMCV L and 2A proteins influence host cell death pathways. Their roles in apoptosis and necrosis vary across different cell types, impacting viral virulence.

Area of Science:

  • Virology
  • Cell Biology
  • Immunology

Background:

  • The EMCV L and 2A proteins are known virulence factors.
  • Both proteins exhibit antiapoptotic properties, but data are inconsistent across studies.
  • Previous research lacked standardized conditions for comparing L and 2A functions.

Purpose of the Study:

  • To investigate the specific roles of EMCV L and 2A proteins in determining host cell death type.
  • To analyze these roles across three distinct cell lines (HeLa, BHK, RD).
  • To utilize EMCV mutants lacking functional L, 2A, or both proteins.

Main Methods:

  • Infection of HeLa, BHK, and RD cell lines with wild-type EMCV and L, 2A, and L+2A deficient mutants.
  • Assessment of viral replication viability in the absence of functional L and 2A proteins.
Keywords:
2A proteinEMCVapoptosiscell death

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  • Analysis of cell death pathways (apoptosis, necrosis, pyroptosis) induced by different EMCV mutants.
  • Evaluation of the impact of caspase inhibition on cell death progression.

    • Main Results:

    • Both L and 2A proteins are non-essential for EMCV replication in HeLa, BHK, and RD cells.
    • L-deficient EMCV induced apoptosis in HeLa and RD cells, but necrosis in BHK cells.
    • 2A-deficient EMCV induced apoptosis in BHK and RD cells.
    • In HeLa cells, 2A-deficient EMCV infection resulted in caspase-dependent pyroptosis-like cell death.
    • Inactivation of both L and 2A, combined with caspase inhibition, delayed cell death.

    Conclusions:

    • EMCV L and 2A proteins are critical determinants of host cell death pathways during infection.
    • The specific type of cell death induced is dependent on the host cell's characteristics.
    • These findings elucidate the complex interplay between viral proteins and host responses in determining infection outcomes.
    leader protein
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