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Updated: Aug 22, 2026

Cercarial Transformation and in vitro Cultivation of Schistosoma mansoni Schistosomules
Published on: August 16, 2011
[Studies on apoptosis and its induction in Schistosoma japonicum]
Objective:
To explore the apoptosis and its induction in S. japonicum.
Methods:
The eggs and adult cells of S. japonicum were isolated. The adult cells were incubated with H2O2, dexamethasone and cyclosporin A, cyclosporin A vehicle solution, respectively in order to initiate the apoptosis. The eggs were treatd at 4 degrees C, 37 degrees C and 42 degrees C, respectively for induction of apoptosis. The occurrence of apoptosis was supervised by agarose gel electrophoresis and in situ end labelling.
Results:
DNA ladder-band characteristic of apoptosis appeared in the cells of adult worms after incubated with H2O2, dexamethasone or cyclosporin A and the eggs treated at 42 degrees C, whereas no DNA ladder band was found in other control groups. In situ end labeling revealed that the positive fluorescence could be seen in the cells incubated with H2O2, dexamethasone or cyclosporin A and few nuclei in the control group and cyclosporin A vehicle solution group appeared positive fluorescence.
Conclusion:
Apoptosis in the cells of S. japonicum adults and eggs induced by chemical or physical agents was observed.
Insights
Apoptosis, programmed cell death, was induced in Schistosoma japonicum (S. japonicum) adult cells and eggs using chemical and physical agents. This study observed the occurrence of apoptosis in parasite cells, offering insights into its mechanisms.
Area of Science:
- Parasitology
- Cell Biology
- Molecular Biology
Context:
- Schistosoma japonicum (S. japonicum) is a parasitic flatworm causing schistosomiasis.
- Understanding apoptosis in S. japonicum is crucial for developing novel control strategies.
Purpose:
- To investigate the induction and occurrence of apoptosis in S. japonicum adult cells and eggs.
- To identify chemical and physical agents capable of triggering programmed cell death in this parasite.
Summary:
- Adult S. japonicum cells treated with H2O2, dexamethasone, or cyclosporin A exhibited DNA laddering characteristic of apoptosis.
- S. japonicum eggs treated at 42°C also showed DNA laddering, indicating apoptosis induction.
- In situ end labeling confirmed apoptosis in treated adult cells and identified positive fluorescence in some control and vehicle-treated groups.
Impact:
- Demonstrates that apoptosis can be induced in S. japonicum by various agents.
- Provides a foundation for exploring targeted apoptosis induction as a potential anti-parasitic therapy.
- Contributes to the fundamental understanding of cell death pathways in parasitic organisms.
Related Concept Videos
Apoptosis
Caspases
The Extrinsic Apoptotic Pathway
The Intrinsic Apoptotic Pathway
Cellular Injury V: Apoptosis and Autophagy

