EGFL7 reduces CNS inflammation in mouse.

EGFL7 reduces CNS inflammation in mouse.
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DOI:
10.1038/s41467-018-03186-z
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发表时间:
2018-02-26
影响因子:
16.6
通讯作者:
Zipp F
Zipp F
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Larochelle C;Uphaus T;Broux B;Gowing E;Paterka M;Michel L;Dudvarski Stankovic N;Bicker F;Lemaître F;Prat A;Schmidt MHH;Zipp F

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血脑屏障(BBB)内皮细胞(ECs)分泌的细胞外基质(ECM)蛋白与细胞运输有关。我们发现ECM表皮生长因子样蛋白7 (EGFL7)在多发性硬化症(MS)患者和实验性自身免疫性脑脊髓炎(EAE)小鼠的中枢神经系统血管中表达增加。在MS病变中,血管周围CD4 T淋巴细胞与ecm结合的EGFL7共定位。人和小鼠活化的T细胞上调EGFL7配体αvβ3整合素,并通过整合素αvβ3粘附EGFL7。egfl7基因敲除(KO)小鼠EAE发病更早,脑和脊髓实质T淋巴细胞浸润增加。重要的是,ec限制性EGFL7-KO与类似的EAE恶化有关。最后,重组EGFL7处理可改善小鼠EAE,降低MCAM表达,收紧血脑屏障。我们的数据表明,EGFL7可以限制中枢神经系统的免疫浸润,可能代表了ms的一种新的治疗途径。内皮细胞释放调节炎症的细胞外基质成分。在这里,作者证明细胞外基质成分表皮生长因子样蛋白7调节实验性小鼠自身免疫性脑脊髓炎的炎症。
Extracellular matrix (ECM) proteins secreted by blood-brain barrier (BBB) endothelial cells (ECs) are implicated in cell trafficking. We discovered that the expression of ECM epidermal growth factor-like protein 7 (EGFL7) is increased in the CNS vasculature of patients with multiple sclerosis (MS), and in mice with experimental autoimmune encephalomyelitis (EAE). Perivascular CD4 T lymphocytes colocalize with ECM-bound EGFL7 in MS lesions. Human and mouse activated T cells upregulate EGFL7 ligand αvβ3 integrin and can adhere to EGFL7 through integrin αvβ3. EGFL7-knockout (KO) mice show earlier onset of EAE and increased brain and spinal cord parenchymal infiltration of T lymphocytes. Importantly, EC-restricted EGFL7-KO is associated with a similar EAE worsening. Finally, treatment with recombinant EGFL7 improves EAE, reduces MCAM expression, and tightens the BBB in mouse. Our data demonstrate that EGFL7 can limit CNS immune infiltration and may represent a novel therapeutic avenue in MS. Endothelial cells release extracellular matrix components that regulate inflammation. Here the authors demonstrate that the extracellular matrix component epidermal growth factor-like protein 7 regulates inflammation in experimental autoimmune encephalomyelitis in the mouse.
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