Targeting of myelin protein zero in a spontaneous autoimmune polyneuropathy.

Targeting of myelin protein zero in a spontaneous autoimmune polyneuropathy.
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DOI:
10.4049/jimmunol.181.12.8753
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发表时间:
2008-12-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Soliven B
Soliven B
中科院分区:
其他
文献类型:
--
作者:
Kim HJ;Jung CG;Jensen MA;Dukala D;Soliven B

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共刺激分子B7-2的消除可预防NOD小鼠中的自身免疫性糖尿病,但导致自发性自身免疫性多发性神经病(SAP)的发展,其类似于人类疾病慢性炎性脱髓鞘性多发性神经根神经病(CIDP)。在这项研究中,我们研究了该模型中的免疫病理机制,包括SAP抗原的鉴定。我们发现B7-2缺陷NOD小鼠脾脏中细胞因子和趋化因子基因表达随时间推移而发生变化。在4个月时(临床前阶段),IL-17增加,IL-10转录水平降低,而干扰素-γ表达在8个月时(临床阶段)达到峰值。在发生SAP的小鼠坐骨神经中,Th 1细胞因子、CXCL 10和RANTES的转录水平也增加。来自SAP小鼠的脾细胞对髓磷脂P0(180-199)表现出增殖和Th 1细胞因子应答,但对其他P0肽或P2(53-78)没有。连续转移SAP小鼠产生的P0反应性T细胞在6只NOD.SCID小鼠中的4只中诱导神经病变。来自静脉内耐受性研究的数据表明,髓磷脂P0是该模型中SAP中T细胞靶向的自身抗原之一。胰岛周围雪旺细胞表达P0提供了一个潜在的机制,连接胰岛自身免疫和炎症性神经病变。
Elimination of the costimulatory molecule B7-2 prevents autoimmune diabetes in NOD mice, but leads to the development of a spontaneous autoimmune polyneuropathy (SAP), which resembles the human disease chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). In this study, we examined the immunopathogenic mechanisms in this model, including identification of SAP antigen/s. We found that B7-2 deficient NOD mice exhibit changes in cytokine and chemokine gene expression in spleens over time. There was an increase in IL-17 and a decrease in IL-10 transcript levels at 4 mo (preclinical phase), while interferon-γ expression peaked at 8 mo (clinical phase). There was also an increase in transcript levels of Th1 cytokines, CXCL10, and RANTES in sciatic nerves of mice that developed SAP. Splenocytes from SAP mice exhibited proliferative and Th1 cytokine responses to myelin P0 (180–199), but not to other P0 peptides or P2 (53–78). Adoptive transfer of P0-reactive T cells generated from SAP mice induced neuropathy in 4 of 6 NOD.SCID mice. Data from intravenous tolerance studies indicate that myelin P0 is one of the autoantigens targeted by T cells in SAP in this model. The expression of P0 by peri-islet Schwann cells provides a potential mechanism linking islet autoimmunity and inflammatory neuropathy.
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