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Protection against schistosomiasis produced by cyclosporin A
Abstract:
Mice infected with Schistosoma mansoni at day 0 were given cyclosporin A (Cy-A) from day 1 to day 3 and reinfected at day 45. They were perfused to recover worms at day 66, at which time mature and immature worms, established from infection and reinfection, respectively, could easily be distinguished. A high degree of protection (90-100%) was obtained against both primary and secondary infection. Elimination of the parasites was an early event since only 10-30% of schistosomula, as compared to those in control mice, were recovered at day 6 by pulmonary perfusion. Our data indicate that a direct effect of Cy-A cannot be demonstrated. Nevertheless, Cy-A did evoke a high level of protection against schistosome infection.
Insights
Cyclosporin A (Cy-A) administration to mice induced high protection against Schistosoma mansoni infection. This immunosuppressive drug treatment resulted in 90-100% parasite elimination, suggesting a novel therapeutic approach.
Area of Science:
- Immunology
- Parasitology
- Pharmacology
Background:
- Schistosoma mansoni is a parasitic flatworm causing schistosomiasis, a significant global health concern.
- Current treatments for schistosomiasis have limitations, necessitating the exploration of alternative therapeutic strategies.
- Immunomodulatory drugs are being investigated for their potential to control parasitic infections.
Purpose of the Study:
- To evaluate the efficacy of cyclosporin A (Cy-A) in protecting mice against Schistosoma mansoni infection.
- To assess the impact of Cy-A on both primary and secondary schistosome infections.
- To investigate the timing and mechanism of parasite elimination following Cy-A treatment.
Main Methods:
- Mice were infected with Schistosoma mansoni on day 0.
- Cyclosporin A (Cy-A) was administered from day 1 to day 3 post-infection.
- Mice were reinfected on day 45 and perfused on day 66 to recover worms; pulmonary perfusion was performed on day 6 to assess early parasite burden.
Main Results:
- Cyclosporin A (Cy-A) treatment conferred a high degree of protection (90-100%) against both primary and secondary Schistosoma mansoni infections.
- Early elimination of parasites was observed, with only 10-30% of schistosomula recovered by day 6 in treated mice compared to controls.
- While a direct effect of Cy-A on the parasite could not be demonstrated, it significantly reduced worm burden.
Conclusions:
- Cyclosporin A (Cy-A) effectively protects against Schistosoma mansoni infection in a murine model.
- The protective effect appears to be mediated by an indirect mechanism, possibly involving host immune modulation.
- Cy-A shows promise as a potential therapeutic agent for schistosomiasis, warranting further investigation.