Functional connectivity alterations in a murine model of optic neuritis.

Functional connectivity alterations in a murine model of optic neuritis.
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DOI:
10.1016/j.expneurol.2017.05.004
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发表时间:
2017-09
影响因子:
5.3
通讯作者:
Wu GF
Wu GF
中科院分区:
医学2区
文献类型:
--
作者:
Wright PW;Archambault AS;Peek S;Bauer AQ;Culican SM;Ances BM;Culver JP;Wu GF

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中枢神经系统(CNS)炎症性脱髓鞘后神经元功能障碍的基础仍然知之甚少。我们使用视神经炎(ON)的实验模型表征了前部视觉通路中对白色物质损伤的网络反应,因为ON通常是多发性硬化症(MS)中免疫介导的CNS脱髓鞘的早期表现。在小鼠中诱导ON之前和之后进行光学固有信号成像,以测量皮质网络功能连接的变化。与对照组相比,我们观察到ON小鼠的同位视觉皮层之间的连接性损失更大。此外,在ON小鼠中,同视皮层连通性的降低与视力丧失相关。这些结果表明,由ON引起的网络连接变化可以在实验鼠系统中建模。未来的研究将确定MS中白色物质损伤导致神经元功能障碍的机制。
The basis for neuronal dysfunction following inflammatory demyelination of the central nervous system (CNS) remains poorly understood. We characterized the network response to white matter injury in the anterior visual pathway using an experimental model of optic neuritis (ON), as ON is often an early manifestation of immune-mediated CNS demyelination in multiple sclerosis (MS). Optical intrinsic signal imaging was performed before and after the induction of ON in mice to measure changes in cortical network functional connectivity. We observed a greater loss of connectivity between homotopic visual cortices in ON mice compared to controls. Further, decreases in homotopic visual cortex connectivity were associated with visual acuity loss in ON mice. These results demonstrate that network connectivity changes resulting from ON can be modeled in an experimental murine system. Future studies will identify the mechanisms that cause neuronal dysfunction due to white matter injury seen in MS.
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