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Hippocampal microglia CD40 mediates NPSLE cognitive dysfunction in mice

机译:海马Microglia CD40介导小鼠的NPSLE认知功能障碍

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摘要

Neuropsychiatric systemic lupus erythematosus (NPSLE) is the most serious and complicated clinical manifestation of lupus erythematosus. Cognitive dysfunction is the most common symptom of NPSLE. A variety of potential mechanisms or mediators related to the pathogenesis of NPSLE cognitive dysfunction have been proposed. However, the involvement of microglia CD40 has not been reported yet. This study aimed to investigate whether hippocampal microglia CD40 of MRL/MpJ-Faslpr (MRL/lpr) mice was involved in NPSLE cognitive dysfunction. This study found, using quantitative polymerase chain reaction, western blotting and immunohistochemistry, that hippocampal CD40 was aberrantly overexpressed in the MRL/lpr lupus mice. It also determined using flow cytometry and immunofluorescence that the aberrantly overexpressed CD40 was mainly derived from hippocampal microglia. The adeno-associated virus was used to inhibit microglia CD40 expression, and the brain damage and cognitive dysfunction of MRL/lpr mice improved. Also, imiquimod (IMQ)-induced lupus mice had the same NPSLE cognitive dysfunction, brain damage, and overexpressed hippocampal microglia CD40 as MRL/ lpr mice. Therefore, IMQ-induced lupus mouse was proposed as one of the mouse models for studying NPSLE cognitive dysfunction for the first time in this study. The findings indicated that hippocampal microglia CD40 was involved in the development of NPSLE cognitive dysfunction, thus providing a novel research direction for the study of the pathogenesis of NPSLE.
机译:神经精神性系统性红斑狼疮(NPSLE)是红斑狼疮最严重、最复杂的临床表现。认知功能障碍是NPSLE最常见的症状。与NPSLE认知功能障碍发病机制相关的各种潜在机制或介质已被提出。然而,小胶质细胞CD40的参与尚未见报道。本研究旨在探讨MRL/MpJ Faslpr(MRL/lpr)小鼠海马小胶质细胞CD40是否参与了NPSLE认知功能障碍。本研究通过定量聚合酶链反应、免疫印迹和免疫组织化学发现,MRL/lpr狼疮小鼠海马CD40异常过度表达。它还利用流式细胞术和免疫荧光技术确定异常过度表达的CD40主要来源于海马小胶质细胞。用腺相关病毒抑制小胶质细胞CD40的表达,改善MRL/lpr小鼠的脑损伤和认知功能障碍。此外,咪喹莫特(IMQ)诱导的狼疮小鼠与MRL/lpr小鼠具有相同的NPSLE认知功能障碍、脑损伤和海马小胶质细胞CD40过度表达。因此,本研究首次提出将IMQ诱导的狼疮小鼠作为研究NPSLE认知功能障碍的小鼠模型之一。研究结果表明,海马小胶质细胞CD40参与了NPSLE认知功能障碍的发生,为研究NPSLE的发病机制提供了新的研究方向。

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