1,25-Dihydroxyvitamin D Inhibits LPS-Induced High-Mobility Group Box 1 (HMGB1) Secretion via Targeting the NF-E2-Related Factor 2-Hemeoxygenase-1-HMGB1 Pathway in Macrophages.

1,25-Dihydroxyvitamin D Inhibits LPS-Induced High-Mobility Group Box 1 (HMGB1) Secretion via Targeting the NF-E2-Related Factor 2-Hemeoxygenase-1-HMGB1 Pathway in Macrophages.
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1,25-二羟基维生素 D 通过靶向巨噬细胞中 NF-E2 相关因子 2-Hemeoxygenase-1-HMGB1 途径抑制 LPS 诱导的高迁移率族盒 1 (HMGB1) 分泌。

DOI:
10.3389/fimmu.2017.01308
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发表时间:
2017
影响因子:
7.3
通讯作者:
Chen Y
Chen Y
中科院分区:
医学2区
文献类型:
--
作者:
Rao Z;Zhang N;Xu N;Pan Y;Xiao M;Wu J;Zhou H;Yang S;Chen Y

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1,25-二羟基维生素D [1,25(OH)2D 3]被认为是炎症性疾病(包括败血症)的关键介质。临床研究表明,1,25(OH)2D 3可保护患者免受脓毒症的影响,但1,25(OH)2D 3的临床治疗很少。在这项研究中,我们报告了1,25(OH)2D 3治疗具有有益的效果,并通过阻断高迁移率族蛋白1(HMGB 1)的分泌来提高LPS诱导的脓毒症小鼠模型的存活率,HMGB 1是脓毒症的关键晚期调节因子。1,25(OH)_2D_3通过阻断HMGB_1从细胞核向细胞质的转运而减弱LPS诱导的HMGB_1分泌。1,25(OH)2D 3可诱导血红素加氧酶-1(HO-1)的表达,而HO-1在阻断HMBG 1核转位及其分泌中起重要作用。当使用siHO-1或HO-1抑制剂时,1,25(OH)2D 3对HMGB 1分泌的抑制作用被抑制。考虑到HO-1是NF-E2相关因子2(Nrf 2)的下游基因,我们进一步证实了Nrf 2在LPS暴露后可被1,25(OH)2D 3激活。总之,我们提供的证据表明,1,25(OH)2D 3减弱LPS诱导的HMGB 1分泌通过Nrf 2/HO-1途径在巨噬细胞。
1,25-Dihydroxyvitamin D [1,25(OH)2D3] is recognized as a key mediator of inflammatory diseases, including sepsis. Clinical studies demonstrate that 1,25 (OH)2D3 protects patients from sepsis, but clinical treatment with 1,25(OH)2D3 is rare. In this study, we report that 1,25(OH)2D3 treatment has beneficial effects and improves the survival rate in LPS-induced mouse sepsis model by blocking the secretion of high-mobility group box 1 (HMGB1), a key late regulator of sepsis. LPS-induced HMGB1 secretion is attenuated by 1,25(OH)2D3 via blocking HMGB1 translocation from the nucleus to the cytoplasm in macrophages. 1,25(OH)2D3 can induce the expression of hemeoxygenase-1 (HO-1), which is essential for blocking HMBG1 nuclear translocation and its secretion. When siHO-1 or an HO-1 inhibitor are used, the effect of 1,25(OH)2D3 on inhibition of HMGB1 secretion is suppressed. Considering that HO-1 is a downstream gene of NF-E2-related factor 2 (Nrf2), we further confirm that Nrf2 activation can be activated by 1,25(OH)2D3 upon LPS exposure. Together, we provide evidence that 1,25(OH)2D3 attenuates LPS-induced HMGB1 secretion via the Nrf2/HO-1 pathway in macrophages.
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