首页> 外文期刊>Cellular immunology >Vitamin A deficiency alters splenic dendritic cell subsets and increases CD8(+)Gr-1(+) memory T lymphocytes in C57BL/6J mice.
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Vitamin A deficiency alters splenic dendritic cell subsets and increases CD8(+)Gr-1(+) memory T lymphocytes in C57BL/6J mice.

机译:维生素A缺乏症改变脾脏树突状细胞亚群,并增加C57BL / 6J小鼠的CD8(+)Gr-1(+)记忆T淋巴细胞。

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摘要

Vitamin A-deficient populations have impaired T cell-dependent antibody responses. Dendritic cells (DCs) are the most proficient antigen-presenting cells to naive T cells. In the mouse, CD11b(+) myeloid DCs stimulate T helper (Th) 2 antibody immune responses, while CD8alpha(+) lymphoid DCs stimulate Th1 cell-mediated immune responses. Therefore, we hypothesized that vitamin A-deficient animals would have decreased numbers of myeloid DCs and unaffected numbers of lymphoid DCs. We performed dietary depletion of vitamin A in C57BL/6J male and female mice and used multicolor flow cytometry to quantify immune cell populations of the spleen, with particular focus on DC subpopulations. We show that vitamin A-depleted animals have increased polymorphonuclear neutrophils, lymphoid DCs, and memory CD8(+) T cells and decreased CD4(+) T lymphocytes. Therefore, vitamin A deficiency alters splenic DC subpopulations, which may contribute to skewed immune responses of vitamin A-deficient populations.
机译:维生素A缺乏症人群的T细胞依赖性抗体反应受损。树突状细胞(DC)是幼稚T细胞最熟练的抗原呈递细胞。在小鼠中,CD11b(+)髓样DC刺激T辅助(Th)2抗体免疫应答,而CD8alpha(+)淋巴样DC刺激Th1细胞介导的免疫应答。因此,我们假设缺乏维生素A的动物的髓样DC数量减少而淋巴样DC的数量不受影响。我们在C57BL / 6J雄性和雌性小鼠中进行了维生素A的日粮消耗,并使用多色流式细胞术来量化脾脏的免疫细胞群,尤其关注DC亚群。我们显示维生素A耗尽的动物增加了多形核中性粒细胞,淋巴DCs和记忆CD8(+)T细胞和减少CD4(+)T淋巴细胞。因此,维生素A缺乏症会改变脾脏DC亚群,这可能会导致维生素A缺乏症人群的免疫反应偏向。

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