Vitamin D treatment attenuates 2,4,6-trinitrobenzene sulphonic acid (TNBS)-induced colitis but not oxazolone-induced colitis.

Vitamin D treatment attenuates 2,4,6-trinitrobenzene sulphonic acid (TNBS)-induced colitis but not oxazolone-induced colitis.
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维生素 D 治疗可减轻 2,4,6-三硝基苯磺酸 (TNBS) 诱发的结肠炎,但不能减轻恶唑酮诱发的结肠炎

DOI:
10.1038/srep32889
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发表时间:
2016-09-13
期刊:
影响因子:
4.6
通讯作者:
Zhao Q
Zhao Q
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Liu T;Shi Y;Du J;Ge X;Teng X;Liu L;Wang E;Zhao Q

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克罗恩病(CD)和溃疡性结肠炎(UC)具有不同的免疫学机制,而它们都是维生素D治疗的潜在靶点。在这项研究中,我们试图使用两种小鼠模型来解决维生素D在CD和UC中的作用。C57 B6 L小鼠在诱导结肠炎前给予维生素D。我们的研究结果表明,维生素D衰减2,4,6-三硝基苯磺酸(TNBS)诱导的结肠炎,但不恶唑酮诱导的结肠炎。维生素D可保护局部组织结构,减轻炎症反应,抑制细胞凋亡,维持紧密连接功能,降低通透性。有趣的是,它对CD小鼠的局部结构保护和炎症抑制的作用大于UC小鼠。维生素D阻断TNBS诱导的结肠炎中辅助T细胞1型(Th 1)和辅助T细胞17型(Th 17)相关细胞因子的增加。但辅助性T细胞2型(Th 2)和调节性T细胞(Treg)相关细胞因子的增加在恶唑酮诱导的结肠炎中同时增强,这相互抵消。我们的研究有助于阐明维生素D对CD和UC患者的不同保护作用,如文献报道的那样。
Crohn’s disease (CD) and ulcerative colitis (UC) have different immunological mechanisms, while both of them are potential targets of vitamin D treatment. In this study, we have tried to address the role of vitamin D in CD and UC using two mouse models. Mice of C57B6L were given vitamin D before the induction of colitis. Our results showed that vitamin D attenuated 2,4,6-trinitrobenzene sulphonic acid (TNBS)-induced colitis but not oxazolone-induced colitis. Vitamin D could preserve the local histology, alleviate inflammation, suppress apoptosis, maintain tight junction function and decrease permeability. Interestingly, it has more of an effect on local structure preservation and inflammation inhibition in CD than in UC mice. Vitamin D blocked the increase of helper T-cell type 1 (Th1)- and helper T-cell type 17 (Th17)-related cytokines in TNBS-induced colitis. But the increase of helper T-cell type 2 (Th2)- and regulatory T cells (Treg)-related cytokines was augmented at the same time in oxazolone-induced colitis which counteracted each other. Our study helps elucidate the differential protective effects of vitamin D on CD and UC patients, as reported in literature.
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