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鞘脂类在中枢神经系统生理学和疾病中的新颖性:关注神经炎症和神经退行性变的鞘脂假说。

Novelty of Sphingolipids in the Central Nervous System Physiology and Disease: Focusing on the Sphingolipid Hypothesis of Neuroinflammation and Neurodegeneration.

机构信息

KNU Alzheimer's Disease Research Institute, Kyungpook National University, Daegu 41566, Korea.

Department of Physiology, School of Medicine, Kyungpook National University, Daegu 41944, Korea.

出版信息

Int J Mol Sci. 2021 Jul 8;22(14):7353. doi: 10.3390/ijms22147353.

Abstract

For decades, lipids were confined to the field of structural biology and energetics as they were considered only structural constituents of cellular membranes and efficient sources of energy production. However, with advances in our understanding in lipidomics and improvements in the technological approaches, astounding discoveries have been made in exploring the role of lipids as signaling molecules, termed bioactive lipids. Among these bioactive lipids, sphingolipids have emerged as distinctive mediators of various cellular processes, ranging from cell growth and proliferation to cellular apoptosis, executing immune responses to regulating inflammation. Recent studies have made it clear that sphingolipids, their metabolic intermediates (ceramide, sphingosine-1-phosphate, and N-acetyl sphingosine), and enzyme systems (cyclooxygenases, sphingosine kinases, and sphingomyelinase) harbor diverse yet interconnected signaling pathways in the central nervous system (CNS), orchestrate CNS physiological processes, and participate in a plethora of neuroinflammatory and neurodegenerative disorders. Considering the unequivocal importance of sphingolipids in CNS, we review the recent discoveries detailing the major enzymes involved in sphingolipid metabolism (particularly sphingosine kinase 1), novel metabolic intermediates (N-acetyl sphingosine), and their complex interactions in CNS physiology, disruption of their functionality in neurodegenerative disorders, and therapeutic strategies targeting sphingolipids for improved drug approaches.

摘要

几十年来,脂质一直局限于结构生物学和能量学领域,因为它们被认为只是细胞膜的结构成分和有效的能量产生来源。然而,随着脂质组学理解的进步和技术方法的改进,人们在探索脂质作为信号分子方面取得了惊人的发现,这些脂质被称为生物活性脂质。在这些生物活性脂质中,鞘脂已成为各种细胞过程的独特介质,从细胞生长和增殖到细胞凋亡,执行免疫反应到调节炎症。最近的研究表明,鞘脂、它们的代谢中间产物(神经酰胺、鞘氨醇-1-磷酸和 N-乙酰神经氨酸)和酶系统(环加氧酶、鞘氨醇激酶和鞘磷脂酶)在中枢神经系统 (CNS) 中具有多样化但相互关联的信号通路,协调 CNS 的生理过程,并参与多种神经炎症和神经退行性疾病。鉴于鞘脂在中枢神经系统中的重要性不可否认,我们回顾了最近的发现,详细描述了参与鞘脂代谢的主要酶(特别是鞘氨醇激酶 1)、新的代谢中间产物(N-乙酰神经氨酸)及其在中枢神经系统生理学中的复杂相互作用、它们在神经退行性疾病中的功能障碍以及针对鞘脂的治疗策略,以改善药物方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f912/8303517/2366a0fba6d6/ijms-22-07353-g001.jpg

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