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Cytotoxic effects exerted by Tritrichomonas foetus pseudocysts
Antonio Pereira-Neves1, Ligia Ferreira Nascimento, Marlene Benchimol
1Laboratório de Ultraestrutura Celular, Universidade Santa Úrsula, Rua Jornalista Orlando Dantas, 59, Botafogo, CEP 22231-010, Rio de Janeiro, Brazil.
Protist
|February 8, 2012
Summary
The Tritrichomonas foetus pseudocyst stage is more cytotoxic to host cells than the pear-shaped form. This parasitic stage causes greater cell injury and mitochondrial damage, suggesting a more aggressive nature.
Area of Science:
- Parasitology
- Cell Biology
- Veterinary Medicine
Background:
- Tritrichomonas foetus exists in pear-shaped and pseudocyst forms.
- The biology and pathogenic mechanisms of the pseudocyst stage are poorly understood.
- Understanding T. foetus pseudocyst interactions with host cells is crucial for disease management.
Purpose of the Study:
- To investigate the cytotoxic effects of T. foetus pseudocysts on canine kidney epithelial cells (MDCK cells).
- To compare the behavior and pathogenicity of pseudocysts versus pear-shaped T. foetus.
- To elucidate the cellular mechanisms underlying pseudocyst-induced host cell damage.
Main Methods:
- Co-incubation of T. foetus pseudocysts and pear-shaped parasites with MDCK cells.
- Scanning electron microscopy to assess epithelial cell morphology and injury.
- MTT viability assay to quantify cytotoxicity.
- JC-1 assay to measure mitochondrial membrane potential.
Main Results:
- Pseudocysts induced significant epithelial cell injury, including microvilli depletion and mitochondrial damage.
- Pseudocysts exhibited more intense amoeboid transformation compared to pear-shaped parasites.
- Pseudocysts demonstrated higher cytotoxicity and induced greater loss of mitochondrial membrane potential in MDCK cells.
- Budding of pseudocysts was observed during host cell interaction.
Conclusions:
- The T. foetus pseudocyst stage exhibits greater cytotoxicity and pathogenicity than the pear-shaped form.
- Pseudocysts induce significant damage to host epithelial cells, potentially through mitochondrial dysfunction.
- The pseudocyst stage may represent a more aggressive and virulent form of T. foetus.
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