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Storage time affects the level and diagnostic efficacy of plasma biomarkers for neurodegenerative diseases

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Neural Regeneration Research 2025年第8期20卷 2373-2381页

作者： lifang Zhao Mingkai Zhang Qimeng li Xuemin Wang Jie lu Ying Han Yanning Cai Department of Clinical Biobank Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Geriatric Medical Research Center BeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology and Nuclear Medicine Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics BeijingChina Key Laboratory of Neurodegenerative diseases Ministry of EducationBeijingChina School of Biomedical Engineering Hainan UniversityHaikouHainan ProvinceChina Center of Alzheimer’s Disease Beijing Institute for Brain DisordersBeijingChina National Clinical Research Center for Geriatric Diseases BeijingChina Institute of Biomedical Engineering Shenzhen Bay LaboratoryGaoke Innovation CenterShenzhenGuangdong ProvinceChina Department of Neurobiology Xuanwu HospitalCapital Medical UniversityBeijingChina

Several promising plasma biomarker proteins,such as amyloid-β(Aβ),tau,neurofilament light chain,and glial fibrillary acidic protein,are widely used for the diagnosis of neurodegenerative ***,little is known about the long-term stability of these biomarker proteins in plasma samples stored at-80°*** aimed to explore how storage time would affect the diagnostic accuracy of these biomarkers using a large *** samples from 229 cognitively unimpaired individuals,encompassing healthy controls and those experiencing subjective cognitive decline,as well as 99 patients with cognitive impairment,comprising those with mild cognitive impairment and dementia,were acquired from the Sino Longitudinal Study on Cognitive Decline *** samples were stored at-80°C for up to 6 years before being used in this *** results showed that plasma levels of Aβ42,Aβ40,neurofilament light chain,and glial fibrillary acidic protein were not significantly correlated with sample storage ***,the level of total tau showed a negative correlation with sample storage ***,in individuals without cognitive impairment,plasma levels of total protein and tau phosphorylated protein threonine 181(p-tau181)also showed a negative correlation with sample storage *** was not observed in individuals with cognitive ***,we speculate that the diagnostic accuracy of plasma p-tau181 and the p-tau181 to total tau ratio may be influenced by sample storage ***,caution is advised when using these plasma biomarkers for the identification of neurodegenerative diseases,such as Alzheimer's ***,in cohort studies,it is important to consider the impact of storage time on the overall results.

关键词： Alzheimer’s disease amyloid-β diagnostic ability glial fibrillary acidic protein neurodegeneration neurofilament light chain plasma biomarkers single molecule array storage time tau

凝集素PHA-E、UEA受体在真孕小鼠和假孕模型小鼠孕早期子宫内膜中的变化

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解剖学杂志 2004年第6期27卷 596-599,i001页

作者：石运芝刘凯邴鲁军李少玲泰山医学院组织学与胚胎学教研室泰安271000 山东大学医学院组织学与胚胎学教研室

目的 :探讨子宫内膜凝集素PHA E和UEA的受体与胚泡植入的关系。方法 :应用生物素标记的凝集素PHA E和UEA ,来检测真孕组、单纯假孕组和蜕膜化假孕组小鼠孕早期子宫内膜中两种凝集素受体的分布状况和变化规律。结果 :PHA E受体广泛分布... 详细信息

目的 :探讨子宫内膜凝集素PHA E和UEA的受体与胚泡植入的关系。方法 :应用生物素标记的凝集素PHA E和UEA ,来检测真孕组、单纯假孕组和蜕膜化假孕组小鼠孕早期子宫内膜中两种凝集素受体的分布状况和变化规律。结果 :PHA E受体广泛分布于各组小鼠子宫内膜腔上皮和腺上皮、蜕膜细胞表面及其周围的ECM ;其在真孕组的水平均显著高于假孕组 ,且在孕 9d时 ,蜕膜化假孕组的水平又显著高于单纯假孕组。UEA受体则主要分布于子宫内膜腺上皮游离缘 ;其在真孕组的水平高于单纯假孕组 ,在孕 6、9d时 ,真孕组的水平又明显低于蜕膜化假孕组。结论 :凝集素PHA E受体与小鼠胚泡植入过程密切相关。

关键词：受体子宫内膜蜕膜化胚泡植入凝集素模型小鼠上皮假孕生物素标记分布

Perilipin-2 mediates ferroptosis in oligodendrocyte progenitor cells and myelin injury after ischemic stroke

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Neural Regeneration Research 2025年第7期20卷 2015-2028页

作者： Jian Yang Jiang Wu Xueshun Xie Pengfei Xia Jinxin lu Jiale liu Lei Bai Xiang li Zhengquan Yu Haiying li Department of Neurosurgery&Brain and Nerve Research Laboratory The First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Institute of Stroke Research Soochow UniversitySuzhouJiangsu ProvinceChina

Differentiation of oligodendrocyte progenitor cells into mature myelin-forming oligodendrocytes contributes to *** of remyelination due to oligodendrocyte progenitor cell death can result in severe nerve *** is an iron-dependent form of regulated cell death caused by membrane rupture induced by lipid peroxidation,and plays an important role in the pathological process of ischemic ***,there are few studies on oligodendrocyte progenitor cell *** analyzed transcriptome sequencing data from GEO databases and identified a role of ferroptosis in oligodendrocyte progenitor cell death and myelin injury after cerebral *** analysis suggested that perilipin-2(PliN2)was involved in oligodendrocyte progenitor cell ***2 is a lipid storage protein and a marker of hypoxia-sensitive lipid droplet *** further investigation,we established a mouse model of cerebral ischemia/*** found significant myelin damage after cerebral ischemia,as well as oligodendrocyte progenitor cell death and increased lipid peroxidation levels around the infarct *** ferroptosis inhibitor,ferrostatin-1,rescued oligodendrocyte progenitor cell death and subsequent myelin *** also found increased PliN2 levels in the peri-infarct area that co-localized with oligodendrocyte progenitor ***2 knockdown rescued demyelination and improved neurological *** findings suggest that targeting PliN2 to regulate oligodendrocyte progenitor cell ferroptosis may be a potential therapeutic strategy for rescuing myelin damage after cerebral ischemia.

关键词： bioinformatics bulk RNA sequencing ferroptosis ischemic stroke myelin injury oligodendrocyte progenitor cell perilipin-2 single-cell RNA sequencing

Enhancing m^(6)A modification in the motor cortex facilitates corticospinal tract remodeling after spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1749-1763页

作者： Tian Qin Yuxin Jin Yiming Qin Feifei Yuan Hongbin lu Jianzhong Hu Yong Cao Chengjun li Department of Spine Surgery and Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Key Laboratory of Organ Injury Aging and Regenerative Medicine of Hunan ProvinceChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Sports Medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Spinal cord injury typically causes corticospinal tract disruption. Although the disrupted corticospinal tract can self-regenerate to a certain degree, the underlying mechanism of this process is still unclear. N6-methyladenosine(m^(6)A) modifications are the most common form of epigenetic regulation at the RNA level and play an essential role in biological processes. However, whether m^(6)A modifications participate in corticospinal tract regeneration after spinal cord injury remains unknown. We found that expression of methyltransferase 14 protein(METTL14) in the locomotor cortex was high after spinal cord injury and accompanied by elevated m^(6)A levels. Knockdown of Mettl14 in the locomotor cortex was not favorable for corticospinal tract regeneration and neurological recovery after spinal cord injury. Through bioinformatics analysis and methylated RNA immunoprecipitation-quantitative polymerase chain reaction, we found that METTL14 regulated Trib2 expression in an m^(6)A-regulated manner, thereby activating the mitogen-activated protein kinase pathway and promoting corticospinal tract regeneration. Finally, we administered syringin, a stabilizer of METTL14, using molecular docking. Results confirmed that syringin can promote corticospinal tract regeneration and facilitate neurological recovery by stabilizing METTL14. Findings from this study reveal that m^(6)A modification is involved in the regulation of corticospinal tract regeneration after spinal cord injury.

关键词： corticospinal tract remodeling epigenetic regulations locomotor cortex m^(6)A modification methyltransferase 14 protein(METTL14) mitogen-activated protein kinase neural regeneration spinal cord injury syringin TRIB2

The Citron homology domain of MAP4Ks improves outcomes of traumatic brain injury

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Neural Regeneration Research 2025年第11期20卷 3233-3244页

作者： Xiaoling Zhong Wenjiao Tai Meng-lu liu Shuaipeng Ma Tianjin Shen Yuhua Zou Chun-li Zhang Department of Molecular Biology University of Texas Southwestern Medical CenterDallasTXUSA Hamon Center for Regenerative Science and Medicine University of Texas Southwestern Medical CenterDallasTXUSA Peter O’Donnell Jr.Brain Institute University of Texas Southwestern Medical CenterDallasTXUSA

The mitogen-activated protein kinase kinase kinase kinases(MAP4Ks)signaling pathway plays a pivotal role in axonal regrowth and neuronal degeneration following *** targeting this pathway is beneficial to brain injury remains *** this study,we showed that adeno-associated virus-delivery of the Citron homology domain of MAP4Ks effectively reduces traumatic brain injury-induced reactive gliosis,tauopathy,lesion size,and behavioral *** inhibition of MAP4Ks replicated the ameliorative effects observed with expression of the Citron homology ***,the Citron homology domain acted as a dominant-negative mutant,impeding MAP4K-mediated phosphorylation of the dishevelled proteins and thereby controlling the Wnt/β-catenin *** findings implicate a therapeutic potential of targeting MAP4Ks to alleviate the detrimental effects of traumatic brain injury.

关键词： adeno-associated virus Citron homology Citron homology domain gene therapy mitogen-activated protein kinase kinase kinase kinases traumatic brain injury

An ultrathin and continuous li_4Ti_5O_(12) coated carbon nanofiber interlayer for high rate lithium sulfur battery

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Journal of Energy Chemistry 2019年第4期28卷 19-26页

作者： Decheng An lu Shen Danni Lei Lehong Wang Heng Ye Baohua li Feiyu Kang Yan-bing He Engineering Laboratory for the Next Generation Power and Energy Storage Batteries Graduate School at Shenzhen Tsinghua University Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University

Severe capacity fading and poor high rate performance of lithium sulfur(li–S) battery caused by "shuttle effect" and low conductivity of sulfur hampers its further developments and applications. li_4Ti_5O_(12) (LTO)possesses high lithium ion conductivity, and it is also can be used as an active adsorbent for polysulfide. Herein, fine LTO particle coated carbon nanofibers(CNF) were prepared and a conductive network both for electron and lithium ion was built, which can greatly promote the electrochemical conversion of polysulfide and improve the rate performance of li–S batteries. Meanwhile, a quantity of adsorption sites is constructed by defects of the surface of LTO-CNF membrane to effectively immobilize polysulfide. The multifunctional LTO-CNF interlayer could impede the shuttle effect and enhance comprehensive electrochemical performance of li–S batteries, especially high rate performance. With such LTO-CNF interlayer,the li–S battery presents a specific capacity of 641.9 mAh/g at 5 C rate. After 400 cycles at 1 C, a capacity of 618.0 mAh/g is retained. This work provides a feasible strategy to achieve high performance of li–S battery for practical utilization.

关键词： lithium sulfur batteries li4Ti5O12 (LTO) Interlayer Polysulfide adsorbent Polysulfide conversion

Atomically precise nickel-sulfur clusters for efficient electrochemical 2,5-hydroxymethylfurfural oxidation

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Nano Research 2025年第1期18卷 140-148页

作者： Fen Wang lu-Yu liu Sha-Sha Cui Ting-Ting li Xiao-Meng Yang Zhijuan liu Yanyong Wang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chem/Bio-sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Nickel sulfide exhibits excellent catalytic activity in the electrochemical 2,5-hydroxymethylfurfural oxidation reaction(HMFOR).However,due to the polydispersity of nanoparticles,it is difficult to establish a clear structure-activity relationship at the atomic *** this work,we have successfully synthesized atomically precise Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)clusters(PET:2-phenylethanethiol)for ***^(2+)and S_(2)-with atomic ratio of 1:2 was mainly existed in Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)to form Ni-S *** electrochemical test results have suggested both Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)displayed outstanding electrocatalytic ability for *** Ni_(6)(PET)_(12)exhibited better electrocatalytic ability than Ni_(4)(PET)_(8)with higher current density,lower overpotential and faster reaction *** superior electrochemical ability of Ni_(6)(PET)_(12)may be due to the enhanced adsorption towards HMF molecule with strong interaction towards hydroxyl group and furan ***,it found that the Ni^(2+)species in Ni_(6)(PET)_(12)could rapidly oxidized into Ni^(3+)species,which could spontaneously capture electron and proton from HMF for *** theoretical calculation demonstrated that the Ni_(6)(PET)_(12)process lower free energy barrier than Ni_(4)(PET)_(8)to display excellent electrocatalytic *** work is of great significance for designing efficient electrocatalysts for HMFOR.

关键词： atomically precise nickel nanoclusters 2 5-hydroxymethylfurfural electro-oxidation Ni3+species

基于Fe3O4@AuNPs/MWCNTs-COOH纳米免疫传感器快速测定水产品的呋喃它酮代谢产物

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食品科学 2025年第2期46卷 222-230页

作者：李亭何欢歌鲁航李书国河北科技大学食品与生物学院河北石家庄050018

采用磁性四氧化三铁(Fe3O4)、纳米金(gold nanoparticles,AuNPs)、羧基化多壁碳纳米管(carboxylated multi-walled carbon nanotubes,MWCNTs-COOH)复合纳米材料固定化呋喃它酮代谢产物3-氨基-5-多酚甲基-2-恶唑烷酮(3-amino-5-methylmorpholino-2-oxazolidinone,AMOZ)抗体制备磁性纳米免疫传感器,建立一种快速检测水产品中呋喃它酮代谢产物的方法。利用紫外-可见光谱和红外光谱技术对制备的纳米Fe3O4和纳米复合材料Fe3O4@AuNPs的结构进行分析,利用扫描电子显微镜和透射电子显微镜对纳米材料的微观形貌进行表征;运用循环伏安法、电化学交流阻抗法对传感器的电化学性能进行表征,以[Fe(CN)6]^(3-/4-)为探针,用微分脉冲伏安法对实验条件进行优化,优化结果如下:Fe3O4@AuNPs和MWCNTs-COOH体积比为1∶2,电解质溶液pH值为7.0,抗体质量浓度为80μg/mL,孵育温度为37℃,孵育时间为30 min。在此条件下,该免疫响应电流与lg C[AMOZ]在1.0×10^(-10)~8.0×10^(-7)mol/L范围内具有良好的线性关系,检出限为2.4×10^(-11)mol/L,在鲫鱼样品实际检测中,加标回收率为92.78%~102.61%,与高效液相色谱-串联质谱法检测结果基本一致,但该法具有前处理简便、检测速度快的优势,可用于实际水产品中呋喃它酮代谢产物AMOZ的快速检测。

关键词：食品安全呋喃它酮代谢产物纳米免疫传感器水产品快速检测

油茶饼粕中茶皂素的提取纯化方法及应用研究进展

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桂林理工大学学报 2014年第1期34卷 113-118页

作者：肖瑜刘以清龚秋实黄琳卢炳丽刘静桂林理工大学广西矿冶与环境科学实验中心广西桂林541004 桂林理工大学环境科学与工程学院广西桂林541004

茶皂素以其良好的农药生物活性和表面活性被广泛用于工农业生产与生活。因其具有皂苷溶于水及多种有机溶剂的性质,传统的茶皂素提取法有水提法和有机溶剂法,近年来随着辅助提法和大孔树脂法研究的深入,使得茶皂素的回收率和纯度大大增... 详细信息

茶皂素以其良好的农药生物活性和表面活性被广泛用于工农业生产与生活。因其具有皂苷溶于水及多种有机溶剂的性质,传统的茶皂素提取法有水提法和有机溶剂法,近年来随着辅助提法和大孔树脂法研究的深入,使得茶皂素的回收率和纯度大大增加。目前茶皂素的开发利用主要集中在医药、化工、饲料工程、土壤修复等领域,文章综述了以上几方面的国内外研究进展。茶皂素是很有潜力的工农业原材料,如果能解决其纯度不高、提取成本高、活性机理研究滞后等问题将有广阔的前景。

关键词：茶皂素提取纯化应用研究进展