School of Public Health, The University of Texas Health Science Center (UTHealth), Houston, TX 77030, USA.
Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India.
Cells. 2021 Oct 18;10(10):2790. doi: 10.3390/cells10102790.
Alzheimer's disease (AD) is one of the most prominent neurodegenerative diseases, which impairs cognitive function in afflicted individuals. AD results in gradual decay of neuronal function as a consequence of diverse degenerating events. Several neuroimmune players (such as cytokines and growth factors that are key players in maintaining CNS homeostasis) turn aberrant during crosstalk between the innate and adaptive immunities. This aberrance underlies neuroinflammation and drives neuronal cells toward apoptotic decline. Neuroinflammation involves microglial activation and has been shown to exacerbate AD. This review attempted to elucidate the role of cytokines, growth factors, and associated mechanisms implicated in the course of AD, especially with neuroinflammation. We also evaluated the propensities and specific mechanism(s) of cytokines and growth factors impacting neuron upon apoptotic decline and further shed light on the availability and accessibility of cytokines across the blood-brain barrier and choroid plexus in AD pathophysiology. The pathogenic and the protective roles of macrophage migration and inhibitory factors, neurotrophic factors, hematopoietic-related growth factors, TAU phosphorylation, advanced glycation end products, complement system, and glial cells in AD and neuropsychiatric pathology were also discussed. Taken together, the emerging roles of these factors in AD pathology emphasize the importance of building novel strategies for an effective therapeutic/neuropsychiatric management of AD in clinics.
阿尔茨海默病(AD)是最突出的神经退行性疾病之一,它会损害患者的认知功能。AD 导致神经元功能逐渐衰退,这是多种退化事件的结果。在先天免疫和适应性免疫之间的相互作用中,几种神经免疫介质(如细胞因子和生长因子,它们是维持中枢神经系统内环境稳定的关键介质)发生异常。这种异常是神经炎症的基础,并促使神经元细胞向凋亡性衰退。神经炎症涉及小胶质细胞的激活,并已被证明会加重 AD。本综述试图阐明细胞因子、生长因子及相关机制在 AD 病程中的作用,特别是与神经炎症有关的作用。我们还评估了细胞因子和生长因子在神经元凋亡性衰退过程中对神经元的影响倾向和特定机制,并进一步阐明了 AD 病理生理学中细胞因子在血脑屏障和脉络丛中的可及性。巨噬细胞迁移和抑制因子、神经营养因子、造血相关生长因子、TAU 磷酸化、晚期糖基化终产物、补体系统和神经胶质细胞在 AD 和神经精神病理学中的致病和保护作用也进行了讨论。综上所述,这些因素在 AD 病理中的新兴作用强调了在临床上为 AD 建立有效治疗/神经精神管理的新策略的重要性。
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