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NAT COMMUN:真菌导致脑部感染和记忆缺陷

2019-01-05 海北 MedSci原创

白色念珠菌的血源性感染是现代医学日益公认的并发症。最近,研究人员提出了低级念珠菌血症的小鼠模型,以确定播散性感染对脑功能和相关免疫决定因素的影响。

白色念珠菌的血源性感染是现代医学日益公认的并发症。最近,研究人员提出了低级念珠菌血症的小鼠模型,以确定播散性感染对脑功能和相关免疫决定因素的影响。

研究人员发现,静脉注射25,000个白色念珠菌细胞可以引起高度局部化的脑炎,其特征在于酵母聚集体周围活化的小神经胶质细胞和星形胶质细胞的积累,形成真菌诱导的神经胶质肉芽肿。淀粉样蛋白前体蛋白在这些肉芽肿的外周积聚,而切割的淀粉样蛋白β)肽在酵母细胞周围积聚。 

CNS定位的白色念珠菌进一步激活转录因子NF-κB,并诱导白细胞介素-1βIL-1β),IL-6和肿瘤坏死因子(TNF)的产生,肽增强BV-2细胞的吞噬和抗真菌活性。此外,感染白色念珠菌的小鼠表现出轻微的记忆障碍,可以通过清除真菌得到缓解。

该结果值得进一步研究,以了解慢性脑炎对认知和免疫功能的影响。


原始出处:

Yifan Wu et al. Microglia and amyloid precursor protein coordinate control of transient Candida cerebritis with memory deficits. NAT COMMUN, 2018; doi: https://doi.org/10.1038/s41467-018-07991-4


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    2019-10-07 liuli5079
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    2019-06-04 liye789132251
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    2019-01-07 zhaojie88
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    2019-01-06 1de9282dm20(暂无匿称)

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