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How do microsporidia invade cells?

Caspar Franzen1

  • 1Department of Internal Medicine I, University of Regensburg, 93042 Regensburg, Germany. Casper.Franzen@Klinik.Uni-Regensburg.de

Folia Parasitologica
|July 12, 2005
PubMed
Summary

Microsporidia are obligate intracellular parasites. Their unique extrusion apparatus, featuring a polar tube, facilitates host cell invasion and survival, ensuring their evolutionary success.

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Area of Science:

  • Microbiology
  • Parasitology
  • Cell Biology

Background:

  • Microsporidia are obligate intracellular eukaryotic parasites.
  • They possess a unique spore extrusion apparatus for host cell infection.

Purpose of the Study:

  • To elucidate the sophisticated infection mechanism of microsporidia.
  • To understand how microsporidia evade host defenses and establish infection.

Main Methods:

  • Analysis of the microsporidian spore structure and extrusion apparatus.
  • Investigation of host cell interaction and invasion pathways.

Main Results:

  • Microsporidia utilize a specialized polar tube to inject infective sporoplasm into host cells.
  • This mechanism allows entry into host cells, bypassing immediate immune detection.
  • Microsporidia can also enter via phagocytosis and subsequently escape phagosomes.

Conclusions:

  • The extrusion apparatus is a key innovation enabling microsporidian host cell invasion and survival.
  • This unique mechanism contributes to the broad host range and evolutionary success of Microsporidia.

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