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Prenatal TCDD in mice increases adult autoimmunity.

机译:小鼠的产前TCDD可提高成年自身免疫性。

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Two immunologically different mouse strains, C57BL/6 and SNF(1), were exposed to a mid-gestation dose of TCDD. The C57BL/6 mouse has a high-affinity aryl hydrocarbon receptor (AhR) and is sensitive to TCDD. The SNF(1) mouse has a low-affinity AhR but spontaneously develops autoimmune nephritis. Autoreactive Vbeta(+)CD4(+)17a and Vbeta(+)CD3(+) T cells were increased at 24-weeks-of-age in offspring of C57BL/6 mice, more so in females than males. The cytokine IFN-gamma was elevated in the females, while IL-10 was elevated in males. Phenotypic changes in B-lineage cells were present in bone marrow and spleen, and circulating autoantibodies were increased after prenatal TCDD. Kidneys of males showed significant anti-IgG and anti-C3 deposition, suggesting early-stage autoimmune disease. The SNF(1) offspring similarly showed increased peripheral Vbeta(+) cells in the females, increased autoantibody production in both sexes, and increased IFN-gamma production in females. Male SNF(1) mice had increased anti-IgG and anti-C3 deposition in kidneys. Both mouse models therefore showed clear signatures of enhanced autoimmunity after prenatal TCDD.
机译:将两种免疫学上不同的小鼠品系C57BL / 6和SNF(1)暴露于妊娠中期TCDD。 C57BL / 6小鼠具有高亲和力的芳烃受体(AhR),并且对TCDD敏感。 SNF(1)小鼠具有低亲和力的AhR,但会自发发展为自身免疫性肾炎。 C57BL / 6小鼠的后代在24周龄时自身反应性Vbeta(+)CD4(+)17a和Vbeta(+)CD3(+)T细胞增加,女性比男性多。女性的细胞因子IFN-γ升高,而男性的IL-10升高。产前TCDD后,骨髓和脾脏中存在B谱系细胞的表型变化,循环中的自身抗体增加。男性肾脏显示出显着的抗IgG和抗C3沉积,提示早期自身免疫性疾病。 SNF(1)的后代类似地显示出雌性的外周Vbeta(+)细胞增加,男女中自身抗体的产生增加以及雌性中IFN-γ的产生增加。雄性SNF(1)小鼠肾脏中的抗IgG和抗C3沉积增加。因此,两种小鼠模型在产前TCDD后均显示出增强的自身免疫性的清晰特征。

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