Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy.
Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica Delle Marche", Via Tronto 10/A, 60126 Ancona, Italy.
Cells. 2024 Aug 4;13(15):1301. doi: 10.3390/cells13151301.
Parkinson's disease (PD) is a progressive neurodegenerative disorder that lacks effective treatment strategies to halt or delay its progression. The homeostasis of Ca ions is crucial for ensuring optimal cellular functions and survival, especially for neuronal cells. In the context of PD, the systems regulating cellular Ca are compromised, leading to Ca-dependent synaptic dysfunction, impaired neuronal plasticity, and ultimately, neuronal loss. Recent research efforts directed toward understanding the pathology of PD have yielded significant insights, particularly highlighting the close relationship between Ca dysregulation, neuroinflammation, and neurodegeneration. However, the precise mechanisms driving the selective loss of dopaminergic neurons in PD remain elusive. The disruption of Ca homeostasis is a key factor, engaging various neurodegenerative and neuroinflammatory pathways and affecting intracellular organelles that store Ca. Specifically, impaired functioning of mitochondria, lysosomes, and the endoplasmic reticulum (ER) in Ca metabolism is believed to contribute to the disease's pathophysiology. The Na+-Ca exchanger (NCX) is considered an important key regulator of Ca homeostasis in various cell types, including neurons, astrocytes, and microglia. Alterations in NCX activity are associated with neurodegenerative processes in different models of PD. In this review, we will explore the role of Ca dysregulation and neuroinflammation as primary drivers of PD-related neurodegeneration, with an emphasis on the pivotal role of NCX in the pathology of PD. Consequently, NCXs and their interplay with intracellular organelles may emerge as potentially pivotal players in the mechanisms underlying PD neurodegeneration, providing a promising avenue for therapeutic intervention aimed at halting neurodegeneration.
帕金森病(PD)是一种进行性神经退行性疾病,目前缺乏有效的治疗策略来阻止或延缓其进展。钙离子的动态平衡对于确保细胞的最佳功能和生存至关重要,特别是对于神经元细胞。在 PD 中,调节细胞内钙离子的系统受到损害,导致钙离子依赖的突触功能障碍、神经元可塑性受损,最终导致神经元丧失。最近,针对 PD 病理的研究工作取得了重大进展,特别是强调了钙失调、神经炎症和神经退行性变之间的密切关系。然而,导致 PD 中多巴胺能神经元选择性丧失的确切机制仍不清楚。钙稳态的破坏是一个关键因素,涉及各种神经退行性和神经炎症途径,并影响储存钙的细胞内细胞器。具体来说,钙代谢中线粒体、溶酶体和内质网(ER)功能障碍被认为是导致疾病病理生理学的原因之一。钠钙交换器(NCX)被认为是包括神经元、星形胶质细胞和小胶质细胞在内的各种细胞类型中钙稳态的重要关键调节剂。NCX 活性的改变与不同 PD 模型中的神经退行性过程有关。在这篇综述中,我们将探讨钙失调和神经炎症作为 PD 相关神经退行性变的主要驱动因素的作用,重点关注 NCX 在 PD 病理中的关键作用。因此,NCX 及其与细胞内细胞器的相互作用可能成为 PD 神经退行性变机制中的潜在关键因素,为旨在阻止神经退行性变的治疗干预提供了有希望的途径。
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