Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.
Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.
J Alzheimers Dis. 2021;83(3):939-961. doi: 10.3233/JAD-210268.
Alzheimer's disease (AD) is the most prevalent neurodegenerative disease commonly diagnosed among the elderly population. AD is characterized by the loss of synaptic connections, neuronal death, and progressive cognitive impairment, attributed to the extracellular accumulation of senile plaques, composed by insoluble aggregates of amyloid-β (Aβ) peptides, and to the intraneuronal formation of neurofibrillary tangles shaped by hyperphosphorylated filaments of the microtubule-associated protein tau. However, evidence showed that chronic inflammatory responses, with long-lasting exacerbated release of proinflammatory cytokines by reactive glial cells, contribute to the pathophysiology of the disease. NLRP3 inflammasome (NLRP3), a cytosolic multiprotein complex sensor of a wide range of stimuli, was implicated in multiple neurological diseases, including AD. Herein, we review the most recent findings regarding the involvement of NLRP3 in the pathogenesis of AD. We address the mechanisms of NLRP3 priming and activation in glial cells by Aβ species and the potential role of neurofibrillary tangles and extracellular vesicles in disease progression. Neuronal death by NLRP3-mediated pyroptosis, driven by the interneuronal tau propagation, is also discussed. We present considerable evidence to claim that NLRP3 inhibition, is undoubtfully a potential therapeutic strategy for AD.
阿尔茨海默病(AD)是最常见的神经退行性疾病,常见于老年人群体。AD 的特征是突触连接丧失、神经元死亡和进行性认知障碍,这归因于细胞外老年斑的积累,由淀粉样β(Aβ)肽不溶性聚集体组成,以及神经元内由微管相关蛋白 tau 过度磷酸化丝形成的神经原纤维缠结。然而,有证据表明,慢性炎症反应,反应性神经胶质细胞长时间过度释放促炎细胞因子,导致疾病的病理生理学。NLRP3 炎性小体(NLRP3)是一种细胞溶质多蛋白复合物,可作为广泛刺激的传感器,与多种神经退行性疾病有关,包括 AD。本文综述了 NLRP3 在 AD 发病机制中的最新研究进展。我们讨论了 Aβ 物种在神经胶质细胞中 NLRP3 引发和激活的机制,以及神经原纤维缠结和细胞外囊泡在疾病进展中的潜在作用。由神经元内 tau 传播驱动的 NLRP3 介导热激细胞死亡也被讨论。我们提供了相当多的证据来证明 NLRP3 抑制无疑是 AD 的一种潜在治疗策略。
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