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Published on: February 22, 2018

Accelerated induction of apoptosis in insect cells by baculovirus-expressed SARS-CoV membrane protein

Chia-Wei Lai1, Zun-Ren Chan, Ding-Gang Yang

  • 1Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.

FEBS Letters
|June 27, 2006
PubMed

Insights

Severe acute respiratory syndrome-associated coronavirus (SARS-CoV) membrane protein induces apoptosis in insect cells, but not mammalian cells. This finding offers new insights into SARS-CoV M protein

Area of Science:

  • Virology
  • Cell Biology
  • Molecular Biology

Background:

  • Previous studies indicated that SARS-CoV 3a and 7a proteins induce apoptosis in mammalian cells.
  • The role of the SARS-CoV membrane (M) protein in apoptosis induction was previously unclear, especially across different cell types.

Purpose of the Study:

  • To investigate the potential of SARS-CoV M protein to induce apoptosis.
  • To compare the effects of SARS-CoV M protein expression in insect versus mammalian cells.

Main Methods:

  • Expression of SARS-CoV M protein in insect cells using a baculovirus system.
  • Expression of SARS-CoV M protein in mammalian cells.
  • Characterization of apoptosis markers including cell death, cytotoxicity, nuclear condensation, and DNA fragmentation.

Main Results:

  • SARS-CoV M protein expression triggered accelerated apoptosis in insect cells, evidenced by rapid cell death and DNA fragmentation.
  • Conversely, SARS-CoV M protein expressed in mammalian cells did not induce apoptosis.
  • This study is the first to report SARS-CoV M protein-induced apoptosis in animal cells.

Conclusions:

  • SARS-CoV M protein can induce apoptosis in insect cells, suggesting cell-type-specific effects.
  • The findings contribute to understanding the mechanisms of SARS-CoV pathogenesis and viral protein functions.
  • Further research is warranted to explore the implications of these cell-specific apoptotic responses.

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