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筛选褪黑素对内质网应激、炎症和氧化损伤介导的神经退行性变的疗效。

Screening the Efficacy of Melatonin on Neurodegeneration Mediated by Endoplasmic Reticulum Stress, Inflammation, and Oxidative Damage.

机构信息

School of Life Sciences, B.S Abdur Rahman Crescent Institute of Science of Technology, Vandalur, Chennai, 600048, Tamil Nadu, India.

出版信息

Appl Biochem Biotechnol. 2022 Mar;194(3):1105-1119. doi: 10.1007/s12010-022-03814-x. Epub 2022 Jan 11.

Abstract

Neurodegeneration may be defined as a clinical condition wherein neurons gradually lose their structural integrity, viability, and functional abilities and the damage inflicted upon the neurons is often irreversible. The various mechanisms that have been observed to contribute to neurodegeneration include aggregation and accumulation of misfolded proteins, impaired autophagy, oxidative damage, neuroinflammation, mitochondrial defects, increased SUMOylation of proteins, impaired unfolded protein response (UPR) pathways, and disruption of axonal transport. Melatonin, a neurohormone, is involved in a variety of functions including scavenging free radicals, synchronizing the circadian rhythm, and mitigating immune response. Melatonin has shown to modulate the UPR pathway, antioxidant pathway through Nrf2 and inflammatory pathway through NFκB. The study aims to determine the efficacy of melatonin on neurodegeneration mediated by endoplasmic reticulum (ER) stress, inflammation, and oxidative damage through in silico approaches. The molecular targets chosen were ATF6, XBP1, PERK, Nrf2, and NFκB and they were docked against melatonin. Melatonin showed to have binding energy with ATF6 as - 4.8 kJ, with PERK as - 3.2 kJ, with XBP1 as - 4.8 kJ, with Nrf2 as - 4.5 kJ, and with that of NFκB as - 4.2 kJ, which implies it interacts well with them. Additionally various physiochemical analyses such as absorption, distribution, metabolism, excretion (ADME) were also carried out. Those analyses revealed that it has an optimal log P of about 1.98, optimal log S of - 2.34, is BBB permeant, has high GI absorption, is not a P-Gp substrate, has a TPSA of 54.12, has a molecular weight of 232.28, and has about 4 rotatable bonds. Also, it showed a bioactivity score of 0.06 for GPCR which implies that it is most likely to exert its function by binding GPCR. The findings imply that melatonin not only shows excellent interactions with the targets but also possesses drug-like physicochemical properties that makes it a valuable choice for the treatment of neurodegenerative disorders.

摘要

神经退行性变可以定义为一种临床病症,其中神经元逐渐失去其结构完整性、活力和功能能力,并且对神经元造成的损害通常是不可逆转的。已经观察到导致神经退行性变的各种机制包括错误折叠蛋白质的聚集和积累、自噬受损、氧化损伤、神经炎症、线粒体缺陷、蛋白质 SUMO 化增加、未折叠蛋白反应 (UPR) 途径受损以及轴突运输中断。褪黑素是一种神经激素,参与多种功能,包括清除自由基、同步昼夜节律和减轻免疫反应。褪黑素已被证明可调节 UPR 途径、通过 Nrf2 调节抗氧化途径和通过 NFκB 调节炎症途径。本研究旨在通过计算方法确定褪黑素对内质网 (ER) 应激、炎症和氧化损伤介导的神经退行性变的疗效。选择的分子靶标是 ATF6、XBP1、PERK、Nrf2 和 NFκB,并对它们与褪黑素进行了对接。褪黑素与 ATF6 的结合能为-4.8 kJ,与 PERK 的结合能为-3.2 kJ,与 XBP1 的结合能为-4.8 kJ,与 Nrf2 的结合能为-4.5 kJ,与 NFκB 的结合能为-4.2 kJ,这表明它与它们相互作用良好。此外,还进行了各种物理化学分析,如吸收、分布、代谢、排泄 (ADME)。这些分析表明,它的最优 log P 约为 1.98,最优 log S 约为-2.34,是 BBB 可渗透的,具有高 GI 吸收,不是 P-Gp 底物,具有 54.12 的 TPSA,分子量为 232.28,约有 4 个旋转键。此外,它对 GPCR 的生物活性评分为 0.06,这意味着它很可能通过与 GPCR 结合来发挥作用。这些发现表明,褪黑素不仅与靶标表现出优异的相互作用,而且还具有类药性的物理化学性质,使其成为治疗神经退行性疾病的有价值选择。

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