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莱什马尼亚婴儿寄生虫的免疫颠覆抑制了粉样β激活微质中的NLRP3驱动的炎症反应

Estefanía Calvo Alvarez¹, Chiara Sfogliarini², Francesca La Rosa³

¹Department of Pharmacological and Biomolecular Sciences, Laboratory of Parasitology, Molecular Virology and Immunology, University of Milan, Milan, Italy. estefania.calvo@unimi.it.

Journal of neuroinflammation

|October 30, 2025

概括

莱什曼尼亚婴儿感染抑制了微质体中的炎症酶激活,为阿尔茨海默病治疗提供了潜在的模型. 这种寄生虫抑制关键的炎症通路,减少神经炎症.

科学领域:

神经免疫学神经免疫学
传染病免疫学传染病免疫学

背景情况:

由微质激活驱动的慢性神经炎症,有助于阿尔茨海默氏症 (AD) 病原发生.
微质中的NLRP3炎症酶是对粉样β (Aβ) 反应的AD相关炎症的中心调解者.
莱什马尼亚婴儿细胞调节巨细胞炎症酶的活性,为研究免疫抑制提供了一个潜在的模型.

研究的目的:

为了研究Leishmania infantum和微质细胞之间的相互作用.
确定L.infantum是否可以调节由Aβ刺激的微质中的NLRP3炎症酶激活.
阐明L.infantum发挥免疫调节作用的机制.

主要方法:

主要微质细胞感染L. infantum.
用Aβ来刺激感染的微质细胞.
评估NLRP3炎症酶组件 (IL-1β,IL-18,TNF-α,氧化,ASC斑点,卡斯帕酶-1,ROS).
对NF-κB信号和A20表达的分析.

主要成果:

婴儿细胞进入并持续存在微质体中,而不会引起激活,表明免疫逃避.
莱什曼尼亚感染显著抑制了Aβ诱导的NLRP3炎症酶激活.
抑制涉及到NF-κB信号的破坏,A20表达的增加,ASC斑点形成的减少,caspase-1激活和ROS生产.
在感染期间,溶酶体的完整性被保留.

结论:

在Aβ刺激的环境中,Leishmania infantum抑制了微质NLRP3炎症酶和NF-κB轴.
寄生虫使用的机制包括NF-κB通路干扰和A20上调调节以进行免疫颠覆.
这些发现揭示了L.infantum在微质中的新抑制作用,并表明了AD的潜在生物灵感治疗策略.

关键词:

莱什曼尼亚婴儿病 (英语:Leishmania infantum) 是一种疾病.阿尔茨海默氏症是阿尔茨海默氏症的一种疾病.粉样蛋白-β 是一种免疫系统的颠覆性颠覆这是天生的免疫力.微质细胞中的微质细胞微质介导的炎症反应在NLRP3炎症酶体中,NLRP3炎症

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