CNS lymphatic drainage and neuroinflammation are regulated by meningeal lymphatic vasculature.

CNS lymphatic drainage and neuroinflammation are regulated by meningeal lymphatic vasculature.
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DOI:
10.1038/s41593-018-0227-9
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发表时间:
2018-10
影响因子:
25
通讯作者:
Kipnis J
Kipnis J
中科院分区:
医学1区
文献类型:
--
作者:
Louveau A;Herz J;Alme MN;Salvador AF;Dong MQ;Viar KE;Herod SG;Knopp J;Setliff JC;Lupi AL;Da Mesquita S;Frost EL;Gaultier A;Harris TH;Cao R;Hu S;Lukens JR;Smirnov I;Overall CC;Oliver G;Kipnis J

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Neuroinflammatory diseases, such as multiple sclerosis, are characterized by invasion of the brain with autoreactive T cells. The mechanism of how T cells acquire their encephalitogenic phenotype and trigger disease remains, however, unclear. The existence of lymphatic vessels in the meninges indicates a relevant link between the central nervous system (CNS) and peripheral immune system, perhaps affecting autoimmunity. Here we demonstrate that meningeal lymphatics fulfill two critical criteria - assist in the drainage of cerebrospinal fluid components and enable immune cells to enter draining lymph nodes in a CCR7-dependent manner. Unlike other tissues, meningeal lymphatic endothelial cells do not undergo expansion during inflammation and express a unique transcriptional signature. Notably, the ablation of meningeal lymphatics diminishes pathology and reduces the inflammatory response of brain-reactive T cells during EAE. Our findings demonstrate that meningeal lymphatics govern inflammatory processes and immune surveillance of the CNS and pose a valuable target for therapeutic intervention.
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