Endothelial NOS-deficient mice reveal dual roles for nitric oxide during experimental autoimmune encephalomyelitis.

Endothelial NOS-deficient mice reveal dual roles for nitric oxide during experimental autoimmune encephalomyelitis.
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DOI:
10.1002/glia.20842
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发表时间:
2009-08-15
期刊:
影响因子:
6.2
通讯作者:
Tsirka, Stella E.
Tsirka, Stella E.
中科院分区:
医学1区
文献类型:
--
作者:
Wui, Muzhou;Tsirka, Stella E.

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多发性硬化(MS)是一种脱髓鞘性自身免疫性疾病,其特征在于血脑屏障受损后T细胞浸润到中枢神经系统(CNS)中。用于在小鼠中模拟该疾病的模型是实验性自身免疫性脑脊髓炎(EAE)。在这份报告中,我们研究了eNOS缺陷(eNOS-/-)小鼠EAE的临床和组织病理学过程,以确定来自这种酶的一氧化氮(NO)在疾病进展中的作用。我们发现eNOS−/−小鼠表现出与延迟BBB破坏相关的EAE延迟发作,从而表明eNOS产生的NO是T细胞浸润到CNS的基础。然而,eNOS−/−小鼠最终也表现出更严重的EAE和延迟恢复,表明NO在MS/EAE中发挥双重作用,一种是引发疾病发作的促炎性作用,另一种是促进疾病恶化事件恢复的神经保护作用。
Multiple sclerosis (MS) is a demyelinating autoimmune disease characterized by infiltration of T cells into the central nervous system (CNS) after compromise of the blood-brain barrier. A model used to mimic the disease in mice is experimental autoimmune encephalomyelitis (EAE). In this report, we examine the clinical and histopathological course of EAE in eNOS-deficient (eNOS−/−) mice to determine the role of nitric oxide (NO) derived from this enzyme in the disease progression. We find that eNOS−/− mice exhibit a delayed onset of EAE that correlates with delayed BBB breakdown, thus suggesting that NO production by eNOS underlies the T cell infiltration into the CNS. However, the eNOS−/− mice also eventually exhibit more severe EAE and delayed recovery, indicating that NO undertakes dual roles in MS/EAE, one proinflammatory that triggers disease onset, and the other neuroprotective that promotes recovery from disease exacerbation events.
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