Effects of different doses of T-2 toxin on organs and bones of BALB/c pregnant mice and their offspring mice / 中华地方病学杂志

ABSTRACT

Objective To study the effects of different doses of T-2 toxin on organs and bones of BALB/c pregnant mice and their offspring mice.Methods Sixty female SPF BALB/c mice at the age of 6-weeks were mated with 30 6-week-old male SPF BALB/c mice.Female mice were divided into control,low dose,medium dose and high dose groups according to body weight via the random digital table method,with 15 mice in each group.After mating with male mice,the pregnant mice in each group were 14,10,9 and 15,respectively.Nutritional interventions (feedthe doses of T-2 toxin were 0,600,1 200 and 2 400 ng/g,respectively) were initiated from the gestation day 0 until the first generation mice were grown up (6-weeks-old).The growth status and organ coefficient (heart,liver,kidney,thymus,spleen and brain) of the two generations in each period were recorded.Skeletal X-ray photographs of the two generations were taken by digital radiography.The histopathological changes in the organs (liver,thymus,spleen and epiphyseal cartilage) of the two generations were observed under light microscope.Results Among the pregnant mice,there were no significant differences in organ coefficients (P ＞ 0.05).No abnormalities were observed in each group of skeletal X-ray photographs.In the female generation mice,there were no significant differences in the coefficients of heart,liver and kidney (F =0.233,2.196,0.430,P ＞ 0.05),while there were significant differences in the coefficients of thymus,spleen and brain (F=3.683,3.148,4.498,P ＜ 0.05),and the thymus coefficient of medium dose group was higher than that of control group;the thymus coefficient of high dose group was lower than that of other three groups;the spleen coefficients of the three dose groups were higher than that of control group;the brain coefficients of the three dose groups were lower than that of control group (P ＜ 0.05).In the male generation mice,there were no significant differences in the coefficients of thymus and brain (F =2.447,1.620,P ＞ 0.05),while there were significant differences in the coefficients of heart,liver,kidney and spleen (F =5.339,2.738,11.435,2.872,P ＜ 0.05),and the heart coefficient of high dose group was lower than that of control group and low dose group;the coefficients of liver and kidney in medium dose and high dose groups were lower than those in control and low dose groups;the spleen coefficients of the three dose groups were higher than that of control group (P ＜ 0.05).The pathological changes of liver,thymus,spleen and epiphyseal cartilage were found in dose exposure groups;epiphyseal hyperplasia was found in the skeletal X-ray photographs of medium and high dose groups.Conclusion T-2 toxin has no significant effects on pregnant mice,but it could cause damage to the organs and epiphyseal plate cartilage of the first generation,and the location of the injury is related to gender.