MicroRNA-21 deficiency protects from lupus-like autoimmunity in the chronic graft-versus-host disease model of systemic lupus erythematosus.

MicroRNA-21 deficiency protects from lupus-like autoimmunity in the chronic graft-versus-host disease model of systemic lupus erythematosus.
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DOI:
10.1016/j.clim.2015.11.010
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发表时间:
2016-01
期刊:
Clinical immunology (Orlando, Fla.)
影响因子:
--
通讯作者:
Kiriakidou M
Kiriakidou M
中科院分区:
其他
文献类型:
--
作者:
Garchow B;Kiriakidou M

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microRNA(miRNAs)是一类主要在转录后水平调控基因表达的非编码小RNA。新出现的证据支持miRNAs在免疫应答和自身免疫中的调节作用。在这项工作中,我们研究了miR-21在实验诱导的系统性红斑狼疮(SLE)bm 12 → B6 cGVHD模型中的意义。miR-21缺陷的cGVHD宿主小鼠显示脾肿大减少2倍,自身抗体滴度显著降低,并且CD 40:CD 40 L和CD 28:CD 80/86共刺激途径的组分下调。此外,我们证明miR-21缺陷型宿主具有减少的CD 4 + IL-17+细胞群体和扩增的CD 4 + CD 25 + FoxP 3+细胞区室。我们认为miR-21具有多能性作用,可连接不同的淋巴细胞信号通路,并作为促进狼疮中B和T细胞活化的信号的“变阻器”。总的来说,我们的实验表明,cGVHD宿主小鼠中的miR-21缺陷足以保护免受狼疮样自身免疫。
MicroRNAs (miRNAs) are small, non-coding RNAs that regulate gene expression primarily at the post-transcriptional level. Emerging evidence supports a regulatory role for miRNAs in the immune response and autoimmunity. In this work, we investigated the implication of miR-21 in the experimentally inducible bm12 → B6 cGVHD model of systemic lupus erythematosus (SLE). cGVHD host mice deficient in miR-21 show a 2-fold reduction in splenomegaly, significantly reduced autoantibody titers and down-regulated components of the CD40:CD40L and CD28:CD80/86 co-stimulation pathways. Furthermore, we demonstrate that miR-21-deficient hosts have reduced CD4+ IL-17+ cell populations and an expanded CD4+ CD25+ FoxP3+ cell compartment. We propose that miR-21 has a pluripotent role, serving to link distinct lymphocyte signaling pathways and acting as a “rheostat” for signals that promote B and T cell activation in lupus. Collectively, our experiments demonstrate that miR-21 deficiency in cGVHD host mice is sufficient to protect from lupus-like autoimmunity.
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