Synaptic and complement markers in extracellular vesicles in multiple sclerosis.

Synaptic and complement markers in extracellular vesicles in multiple sclerosis.
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多发性硬化症中细胞外囊泡中的突触和补体标记。

DOI:
10.1177/1352458520924590
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发表时间:
2021-04
期刊:
Multiple sclerosis (Houndmills, Basingstoke, England)
影响因子:
--
通讯作者:
Kapogiannis D
Kapogiannis D
中科院分区:
其他
文献类型:
--
作者:
Bhargava P;Nogueras-Ortiz C;Kim S;Delgado-Peraza F;Calabresi PA;Kapogiannis D

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突触丢失是MS病理学的一个特征,即使在正常的灰质中也可以看到。补体成分对突触的调理作用可能是病理性突触丧失的基础。我们试图确定循环神经元富集和星形胶质细胞富集的细胞外囊泡(NEV和AEV)是否提供反映MS中补体介导的突触丢失的生物标志物。从61名MS患者(46名RRMS,15名进行性MS)和31名健康对照的血浆中,我们免疫捕获L1 CAM + NEV和GLAST+ AEV。我们测量了NEV中的突触前和突触后蛋白突触足蛋白和突触素以及AEV、总循环EV和纯血浆中的补体成分(C1 q、C3、C3 B/iC 3 B b、C4、C5、C5 a、C9、因子B、因子H)。我们发现,与对照组相比,MS中NEV突触足蛋白和突触素的水平较低(两者均为p < 0.0001)。在AEV中,我们发现MS患者的多种补体级联成分水平高于对照组;这些差异在总EV或纯血浆中未观察到。值得注意的是,在MS中NEV突触蛋白和多种AEV补体成分之间存在强烈的负相关,但在对照组中没有。循环EV可以识别MS中的突触丢失,并表明星形胶质细胞补体产生和突触丢失之间的联系。
Synaptic loss is a feature of MS pathology that can be seen even in normal-appearing grey matter. Opsonization of synapses with complement components may underlie pathologic synapse loss. We sought to determine whether circulating neuronal-enriched and astrocytic-enriched extracellular vesicles (NEVs and AEVs) provide biomarkers reflecting complement-mediated synaptic loss in MS. From plasma of 61 people with MS (46 RRMS, 15 Progressive MS) and 31 healthy controls, we immunocaptured L1CAM+ NEVs and GLAST+ AEVs. We measured pre-and post-synaptic proteins synaptopodin and synaptophysin in NEVs and complement components (C1q, C3, C3b/iC3b, C4, C5, C5a, C9, Factor B, Factor H) in AEVs, total circulating EVs and neat plasma. We found lower levels of NEV synaptopodin and synaptophysin in MS compared to controls (p < 0.0001 for both). In AEVs, we found higher levels of multiple complement cascade components in people with MS compared to controls; these differences were not noted in total EVs or neat plasma. Strikingly, there were strong inverse correlations between NEV synaptic proteins and multiple AEV complement components in MS, but not in controls. Circulating EVs could identify synaptic loss in MS and suggest a link between astrocytic complement production and synaptic loss.
DOI: 10.1186/2051-5960-2-53
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影响因子: 7.1
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