Front Immunol:维生素D研究揭示了对免疫系统的影响

2021-06-23 Viho MedSci原创

维生素D是身体对阳光的反应而产生的,并且经常因其对健康的好处而受到称赞。研究人员发现,它也会影响免疫系统的关键细胞-树突状细胞(DC),它是一种特殊的哨兵细胞,连接天然免疫和适应性免疫反应。

维生素D是身体对阳光的反应而产生的,并且经常因其对健康的好处而受到称赞。研究人员发现,它也会影响免疫系统的关键细胞-树突状细胞(DC),它是一种特殊的哨兵细胞,连接天然免疫和适应性免疫反应,在形成适应性免疫反应中起着关键作用。因此,维生素D代谢物经常被用于制定治疗性树突状细胞治疗自身免疫性疾病的方案。这一发现可能解释了维生素D是如何调节与自身免疫性疾病有关的免疫反应的。

爱丁堡大学的研究小组研究了维生素D如何影响人体免疫系统中的一种机制--树突状细胞激活T细胞的能力。这项研究发表在Frontiers in Immunology上。

在健康人中,T细胞在帮助对抗感染方面起着至关重要的作用。然而,对于患有自身免疫性疾病的人来说,它们开始攻击自己的组织。

通过研究来自老鼠和人类的细胞,研究人员发现维生素D导致树突状细胞在其表面产生更多的分子CD 31,这阻碍了T细胞的激活。

下调VitD骨髓源性DC(BMDC)CD 31的表达增强

实验表明CD 31能缩短BMDC-T细胞的相互作用时间。这是激活过程中必不可少的一部分--由此产生的免疫反应大大减少。

研究人员说,研究结果揭示了维生素D缺乏如何调节免疫系统并影响自身免疫性疾病的易感性。CD 31作为一种共同抑制分子,至少部分地通过减少BMDC与幼稚T细胞之间的相互作用来阻止有效的T细胞启动。

维生素D水平低一直被认为是几种自身免疫性疾病发展的一个重要风险因素,这些研究揭示了维生素D代谢物能显著影响免疫系统的一种方式。

文章参考:Louise Saul, Iris Mair, Alasdair Ivens, Pamela Brown, Kay Samuel, John D. M. Campbell, Daniel Y. Soong, Nadine Kamenjarin, Richard J. Mellanby. 1,25-Dihydroxyvitamin D3 Restrains CD4 T Cell Priming Ability of CD11c Dendritic Cells by Upregulating Expression of CD31Frontiers in Immunology, 2019; 10 DOI: 10.3389/fimmu.2019.00600

 

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    2021-09-01 两百斤的胖子

    学习了

    0

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    2021-06-24 莉莉安 Lillian C.

    0

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    2021-06-24 1de3c848m58(暂无匿称)

    重新认识维生素D

    0

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    2021-06-24 weigq

    多晒太阳!

    0

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    2021-06-24 ms1000001112657712

    晒太阳来提高免疫力!

    0

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    2021-06-23 ms3000001951870819

    对维生素作用重新认识👍

    0

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