纳米寡聚物疗法对NF-κB/NLRP3的翻译抑制减轻了乙醇和衰老相关的神经炎症。

NF-κB/NLRP3 Translational Inhibition by Nanoligomer Therapy Mitigates Ethanol and Advanced Age-Related Neuroinflammation.

作者信息

Anton Paige E, Nagpal Prashant, Moreno Julie, Burchill Matthew A, Chatterjee Anushree, Busquet Nicolas, Mesches Michael, Kovacs Elizabeth J, McCullough Rebecca L

机构信息

Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO.

Alcohol Research Program, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO.

出版信息

bioRxiv. 2024 Feb 28:2024.02.26.582114. doi: 10.1101/2024.02.26.582114.

Abstract

Binge alcohol use is increasing among aged adults (>65 years). Alcohol-related toxicity in aged adults is associated with neurodegeneration, yet the molecular underpinnings of age-related sensitivity to alcohol are not well described. Studies utilizing rodent models of neurodegenerative disease reveal heightened activation of Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and Nod like receptor 3 (NLRP3) mediate microglia activation and associated neuronal injury. Our group, and others, have implicated hippocampal-resident microglia as key producers of inflammatory mediators, yet the link between inflammation and neurodegeneration has not been established in models of binge ethanol exposure and advanced age. Here, we report binge ethanol increased the proportion of NLRP3 microglia in the hippocampus of aged (18-20 months) female C57BL/6N mice compared to young (3-4 months). In primary microglia, ethanol-induced expression of reactivity markers and NLRP3 inflammasome activation were more pronounced in microglia from aged mice compared to young. Making use of an NLRP3-specific inhibitor (OLT1177) and a novel brain-penetrant Nanoligomer that inhibits NF-κB and NLRP3 translation (SB_NI_112), we find ethanol-induced microglial reactivity can be attenuated by OLT1177 and SB_NI_112 in microglia from aged mice. In a model of intermittent binge ethanol exposure, SB_NI_112 prevented ethanol-mediated microglia reactivity, IL-1β production, and tau hyperphosphorylation in the hippocampus of aged mice. These data suggest early indicators of neurodegeneration occurring with advanced age and binge ethanol exposure are NF-κB- and NLRP3-dependent. Further investigation is warranted to explore the use of targeted immunosuppression via Nanoligomers to attenuate neuroinflammation after alcohol consumption in the aged.

摘要

老年人(>65岁)中暴饮酒精的情况正在增加。老年人中与酒精相关的毒性与神经退行性变有关,但年龄相关的酒精敏感性的分子基础尚未得到充分描述。利用神经退行性疾病啮齿动物模型的研究表明,活化B细胞的核因子κ轻链增强子(NF-κB)和Nod样受体3(NLRP3)的激活增强介导了小胶质细胞活化及相关的神经元损伤。我们小组以及其他研究表明,海马驻留小胶质细胞是炎症介质的关键产生者,但在暴饮乙醇暴露和高龄模型中,炎症与神经退行性变之间的联系尚未确立。在此,我们报告,与年轻(3-4个月)雌性C57BL/6N小鼠相比,暴饮乙醇增加了老年(18-20个月)雌性C57BL/6N小鼠海马中NLRP3小胶质细胞的比例。在原代小胶质细胞中,与年轻小鼠相比,乙醇诱导的反应性标志物表达和NLRP3炎性小体激活在老年小鼠的小胶质细胞中更为明显。利用NLRP3特异性抑制剂(OLT1177)和一种新型的可穿透大脑的纳米寡聚物,其可抑制NF-κB和NLRP3翻译(SB_NI_112),我们发现OLT1177和SB_NI_112可减弱老年小鼠小胶质细胞中乙醇诱导的小胶质细胞反应性。在间歇性暴饮乙醇暴露模型中,SB_NI_112可预防老年小鼠海马中乙醇介导的小胶质细胞反应性、IL-1β产生和tau过度磷酸化。这些数据表明,与高龄和暴饮乙醇暴露相关的神经退行性变的早期指标是NF-κB和NLRP3依赖性的。有必要进一步研究,以探索通过纳米寡聚物进行靶向免疫抑制,以减轻老年人饮酒后神经炎症的可能性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a5/10925165/165d70b086d7/nihpp-2024.02.26.582114v1-f0001.jpg

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