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Pathogen recognition by the cell surface receptor CD46 induces autophagy

Grégory Meiffren1, Pierre-Emmanuel Joubert, Isabel Pombo Grégoire

  • 1Université de Lyon, INSERM, U851, Université Lyon 1, IFR128, Lyon, France.

Autophagy
|January 21, 2010
PubMed

Insights

Cell surface receptor CD46 triggers autophagy, a cellular defense mechanism, upon pathogen detection. This pathway, involving GOPC and Beclin 1/VPS34, is crucial for controlling early infection.

Area of Science:

  • Cell biology
  • Immunology
  • Microbiology

Background:

  • Autophagy is a key cellular process for degrading pathogens.
  • The precise molecular triggers for autophagy activation by pathogens are not fully understood.

Purpose of the Study:

  • To investigate the role of cell surface receptor CD46 in initiating autophagy upon pathogen recognition.
  • To elucidate the molecular pathway linking CD46 to autophagosome formation.

Main Methods:

  • Investigated the CD46 receptor's role in pathogen-induced autophagy.
  • Utilized molecular biology techniques to identify key proteins in the signaling pathway.

Main Results:

  • Demonstrated that CD46 directly induces autophagy following pathogen binding.
  • Identified the scaffold protein GOPC and the Beclin 1/VPS34 complex as essential components of the CD46-mediated autophagy pathway.

Conclusions:

  • CD46 acts as a crucial initiator of autophagy in response to pathogen invasion.
  • The identified CD46-GOPC-Beclin 1/VPS34 pathway is vital for early control of infection.

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