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Lethal and sub-lethal yessotoxin dose-induced morpho-functional alterations in intraperitoneal injected Swiss CD1
A Franchini1, E Marchesini, R Poletti
1Department of Animal Biology, University of Modena and Reggio Emilia, Via Campi 213/D, 41100 Modena, Italy.
Abstract:
Histological and immunocytochemical investigations were performed on different organs (brain, duodenum and thymus) of mice following lethal (420 microg/kg) or sublethal (10 microg/kg) intraperitoneal injection of yessotoxin (YTX). No morpho-functional modifications were observed in large neurons of the cerebral and cerebellar cortex with the sub-lethal dose, nor in the cerebral cortex with the lethal dose. The duodenum also did not show significant alterations. However, there was an inflammation response to the toxin, in which blood cells and cytokines were involved. This was more evident with the lethal YTX dose. The thymus and, in general, the immune system are the main targets of YTX at both the concentrations used. Furthermore, the alterations present in the thymus may support tumorigenic implications.
Insights
Yessotoxin (YTX) primarily targets the thymus and immune system in mice, causing inflammation. While the brain and duodenum showed minimal changes, YTX may have tumorigenic implications for the thymus.
Area of Science:
- Marine toxicology
- Immunology
- Histopathology
Background:
- Yessotoxin (YTX) is a marine toxin with potential health impacts.
- Understanding YTX's organ-specific toxicity is crucial for risk assessment.
Purpose of the Study:
- To investigate the effects of lethal and sublethal YTX doses on mouse organs.
- To determine the primary target organs and potential long-term consequences of YTX exposure.
Main Methods:
- Histological and immunocytochemical analyses were conducted on brain, duodenum, and thymus tissues from mice.
- Mice received either lethal (420 microg/kg) or sublethal (10 microg/kg) intraperitoneal injections of YTX.
Main Results:
- No significant morpho-functional changes were observed in brain neurons or duodenum tissues.
- An inflammatory response involving blood cells and cytokines was noted, more pronounced with the lethal YTX dose.
- The thymus and immune system were identified as primary targets of YTX at both tested concentrations.
Conclusions:
- Yessotoxin primarily affects the immune system, particularly the thymus.
- Observed thymic alterations suggest potential tumorigenic implications requiring further investigation.
- YTX exhibits dose-dependent inflammatory responses, with minimal impact on brain and duodenum.
