T-2 toxin, A trichothecenes mycotoxin, is immunotoxic to animals and humans. Although it is highly cardiotoxic, the pathogenesis of cardiomyopathy caused by T-2 toxin is not entirely clear. Hence, in our research, cardiomyopathy was induced by a single injection of T-2 mycotoxin (0.23 mg/kg s.c., 1 LD50) to Wistar rats. The cardiac tissue was carefully examinated by using basic histopathology, semiquantitative (tissue grading score scales) and imaging (a total number of mast cells - MCs) analyses on days 1, 7, 14, 21, 28 and 60 of the study. The most intensive myocardial alterations (cardiac damage score, CDS = 4.20-4.40), irregular glycogen distribution (glycogen distribution score, GDS = 4.07-4.17), haemorrhagic foci (vascular damage score, VDS = 4.57-4.90), diffuse accumulation and degranulation of MCs were observed on day 28 and 60 after treatment (p < 0.001 vs. control and 1st T-2-toxin-treated group, respectively). Besides, statistically significant positive correlations were obtained regarding myocardial injury, glycogen distribution and intensity of haemorrhage, and a negative correlation was found in the case of MCs. Obtained results are essential and crucial for further in vivo experimental studies, including the development of medications able to reduce T-2 toxin-induced cardiotoxicity.

College of Life Science Yangtze University 1 Nanhuan Road 434023 Jingzhou Hubei China; Department of Chemistry Faculty of Science University of Hradec Kralove Rokitanského 62 500 03 Hradec Králové Czech Republic

Department of Chemistry Faculty of Science University of Hradec Kralove Rokitanského 62 500 03 Hradec Králové Czech Republic

National Poison Control Centre Military Medical Academy 17 Crnotravska St 11000 Belgrade Serbia; Medical Faculty of the Military Medical Academy University of Defence 1 Pavla Jurišića Šturma St 11000 Belgrade Serbia; Department of Chemistry Faculty of Science University of Hradec Kralove Rokitanského 62 500 03 Hradec Králové Czech Republic

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