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Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou Zhang Shuo Li fu Tang Jingkai Zhang Yuetong kang Hean Zhang Lidong Li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial

核心钟基因Bmal1通过JNK/caspase-3信号通路抑制缺血再灌注损伤PC12细胞的炎症及凋亡

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中国病理生理杂志 2022年第11期38卷 1972-1980页

作者：曾富康张宇星周德生陈瑶刘利娟李中湖南中医药大学中西医结合心脑疾病防治湖南省重点实验室湖南长沙410208 湖南中医药大学第一附属医院湖南长沙410007

目的:探讨核心钟基因Bmal1(brain and muscle Arnt-like 1)对脑缺血再灌注损伤后细胞炎症反应及凋亡的影响。方法:通过慢病毒转染建立Bmal1基因沉默(si-Bmal1)及阴性对照(si-NC)的稳定大鼠肾上腺嗜铬细胞瘤PC12细胞株,将细胞分为空白(bl... 详细信息

目的:探讨核心钟基因Bmal1(brain and muscle Arnt-like 1)对脑缺血再灌注损伤后细胞炎症反应及凋亡的影响。方法:通过慢病毒转染建立Bmal1基因沉默(si-Bmal1)及阴性对照(si-NC)的稳定大鼠肾上腺嗜铬细胞瘤PC12细胞株,将细胞分为空白(blank)组、氧糖剥夺/复氧(OGD/R)组、OGD/R+si-NC组及OGD/R+si-Bmal1组。通过OGD/R诱导建立脑缺血再灌注损伤体外模型,CCK-8法检测沉默Bmal1基因对细胞活力及OGD/R后细胞活力的影响;Western blot法检测Bmal1、磷酸化c-Jun氨基末端激酶(p-JNK)及cleaved caspase-3蛋白水平;RT-qPCR法检测Bmal1、JNK及caspase-3的mRNA表达水平;ELISA法检测细胞上清液中白细胞介素6(IL-6)和肿瘤坏死因子α(TNF-α)水平;流式细胞术及TUNEL染色法检测各组细胞凋亡率;免疫荧光检测JNK核内表达情况。结果:沉默Bmal1基因使PC12细胞活力及OGD/R后PC12细胞活力均显著下降(P<0.05或P<0.01)。沉默Bmal1基因可进一步促进OGD/R后JNK/caspase-3通路相关分子的mRNA及蛋白表达(P<0.05或P<0.01),增加细胞上清液中炎症因子IL-6和TNF-α水平及细胞凋亡率(P<0.05或P<0.01),促进JNK核内表达。结论:核心钟基因Bmal1抑制缺血再灌注损伤PC12细胞的炎症反应及凋亡,其机制可能与JNK/caspase-3信号通路有关。

关键词：脑缺血再灌注损伤 Bmal1基因炎症细胞凋亡 JNK/caspase-3信号通路

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生物节律调控缺血性中风及中医药的干预作用

中国中药杂志 2023年第3期48卷 569-578页

作者：李中刘利娟颜思阳高晓峰曾富康周德生张宇星湖南中医药大学第一附属医院神经内科湖南长沙410000 湖南中医药大学研究生院湖南长沙410000

生物节律是生物体为适应自然界环境的昼夜周期变化而形成的内在调控机制,调节哺乳动物的病理生理过程、疾病发生发展及对治疗的反应性。生物节律可显著影响缺血性中风的易感性、损伤、恢复和对治疗的反应机制。越来越多的证据表明,生物... 详细信息

生物节律是生物体为适应自然界环境的昼夜周期变化而形成的内在调控机制,调节哺乳动物的病理生理过程、疾病发生发展及对治疗的反应性。生物节律可显著影响缺血性中风的易感性、损伤、恢复和对治疗的反应机制。越来越多的证据表明,生物节律不仅对缺血性中风事件的重要生理因素,如血压、凝血-纤溶系统具有调控作用,同时还参与缺血损伤后由胶质细胞、外周免疫细胞介导的免疫炎症反应,以及对神经血管单元(neurovascular unit,NVU)的调节作用。该研究旨在将生物节律生物学中的分子、细胞和生理途径与缺血性中风的临床后果联系起来,阐述生物节律对缺血性中风发病的影响,对神经血管单元的调控,对免疫炎症反应的调节,并综述中药干预生物节律的研究进展,为后续生物节律的中医药研究和分子机制研究提供合理的、有价值的参考依据。

关键词：生物节律缺血性中风分子机制中医药

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昼夜环境紊乱对缺血性中风后血管新生的影响及活血荣络方的干预作用

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中国药理学通报 2023年第11期39卷 2177-2185页

作者：曾富康张宇星周德生陈瑶李中刘利娟湘西州民族中医院重症医学科湖南吉首416000 湖南中医药大学第一附属医院脑病科湖南长沙410007

目的观察昼夜环境紊乱对缺血性中风后血管新生的影响及活血荣络方的干预作用。方法SD大鼠随机分假手术组、模型组(MCAO)、活血荣络方组(MCAO+HXRLF)、模型+生物节律紊乱组(MCAO-ECD)及模型+生物节律紊乱+活血荣络方组(MCAO-ECD+HXRLF),... 详细信息

目的观察昼夜环境紊乱对缺血性中风后血管新生的影响及活血荣络方的干预作用。方法SD大鼠随机分假手术组、模型组(MCAO)、活血荣络方组(MCAO+HXRLF)、模型+生物节律紊乱组(MCAO-ECD)及模型+生物节律紊乱+活血荣络方组(MCAO-ECD+HXRLF),建立大脑中动脉闭塞再灌注模型,给药10 d。采用神经功能缺损评分评价神经功能缺损;HE染色观察病理变化;免疫荧光观察海马及皮质CD34数;Western blot法检测血管新生及生物节律关键蛋白;ELISA法检测血清血管内皮生长因子(vascular endothelial growth factor,VEGF)、褪黑素(melatonine,MT)及炎症因子。结果昼夜环境紊乱加重梗死后神经缺损(P<0.01),减少皮质及海马CD34阳性细胞数(P<0.05),降低脑内血管新生蛋白(P<0.05)及血清中VEGF(P<0.01)、MT(P<0.05)水平,升高血清IL-1β(P<0.01)与TNF-α(P<0.05)水平,活血荣络方改善昼夜环境紊乱加重的神经功能缺损(P<0.01),增加皮质及海马区CD34阳性细胞数表达(P<0.05),增加脑组织血管新生蛋白表达(P<0.05),升高血清中VEGF(P<0.01)、MT(P<0.05)水平,降低炎症因子水平(P<0.05)。结论昼夜环境紊乱加重脑梗死后神经功能损伤,抑制血管新生,活血荣络方可逆转该进程,促进血管新生,减轻炎症反应,改善神经功能缺损。

关键词：缺血性中风昼夜环境紊乱生物节律活血荣络方血管新生炎症反应

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活血荣络方调控生物钟蛋白Bmal1改善bEnd.3细胞糖氧剥夺/复氧损伤后血管新生的机制研究

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中草药 2022年第20期53卷 6509-6520页

作者：张宇星张瑛曾富康郭纯高晓峰李中陈瑶周德生刘利娟湖南中医药大学湖南长沙410000 湖南中医药大学第一附属医院湖南长沙410000

目的基于阴阳理论及活血荣络方(Huoxue Rongluo Recipe,HXRL)对脑梗死后血管新生的影响,探讨HXRL调控生物钟蛋白脑和肌肉芳烃受体核转位蛋白1(brain and muscle Arnt-like 1,Bmal1)促内皮细胞血管新生的作用机制。方法采用Western blot... 详细信息

目的基于阴阳理论及活血荣络方(Huoxue Rongluo Recipe,HXRL)对脑梗死后血管新生的影响,探讨HXRL调控生物钟蛋白脑和肌肉芳烃受体核转位蛋白1(brain and muscle Arnt-like 1,Bmal1)促内皮细胞血管新生的作用机制。方法采用Western blotting检测小鼠脑微血管内皮细胞株(bEnd.3)受到糖氧剥夺/复氧(oxygen-glucose deprivation/reperfusion,OGD/R)损伤后各时间点生物钟蛋白Bmal1和Clock的表达;利用染色质免疫共沉淀-测序分析(chromatin immunoprecipitation sequencing,ChIP-seq)明确Bmal1在全基因组中发挥的作用,以及对bEnd.3细胞生物进程、细胞组成及分子功能的影响。采用CCK-8法检测HXRL含药血清最佳干预浓度,敲降bEnd.3细胞Bmal1基因,设置对照组、模型组、HXRL含药血清组、si-Bmal1组和si-Bmal1+HXRL含药血清组,通过划痕、迁移、成管等实验检测细胞迁移及血管形成能力;采用免疫荧光检测各组血管内皮生长因子(vascular endothelial growth factor,VEGF)和神经源性基因Notch同源蛋白1(neurogenic locus notch homolog protein 1,Notch1)表达;采用Western blotting检测VEGF、基质金属蛋白酶2(matrix metalloproteinases 2,MMP2)、Notch1蛋白胞内结构域(notch1 intracellular domain,NICD)和δ样蛋白4(delta-like protein 4,DLL4)蛋白表达。结果 b End.3细胞受到OGD/R损伤后,Bmal1及Clock蛋白表达逐渐升高,造模8、12、16、20 h后具有显著差异(P<0.05、0.001)。ChIP-seq提示Bmal1在内皮细胞中参与细胞发育、分化、增殖等进程,靶向调节VEGF、Notch1启动子区域。CCK-8实验结果显示,bEnd.3细胞受到OGD/R损伤后,10%的HXRL含药血清可有效改善细胞活力(P<0.001)。划痕、迁移及成管实验证实HXRL含药血清可有效改善bEnd.3细胞OGD/R损伤后的迁移能力及血管生成能力(P<0.05、0.01、0.001),但在Bmal1敲降株中,该促进作用被抑制(P<0.05、0.01、0.001)。免疫荧光及Western blotting结果显示,HXRL含药血清可进一步升高OGD/R损伤的bEnd.3细胞中VEGF、MMP2、NICD、DLL4、Bmal1及Clock蛋白表达(P<0.05、0.01、0.001),在Bmal1敲降株中,HXRL含药血清对VEGF、MMP2、NICD及DLL4的促表达作用被抑制(P<0.05、0.01、0.001)。结论 HXRL可有效促进内皮细胞经OGD/R损伤后的血管生成能力,其作用机制与调控生物钟Bmal1蛋白密切相关。

关键词：活血荣络方脑梗死生物钟蛋白Bmal1 氧糖剥夺 Bmal1敲降株血管新生

Investigating Müller glia reprogramming in mice: a retrospective of the last decade, and a look to the future

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Neural Regeneration Research 2025年第4期20卷 946-959页

作者： Zhiyuan Yin Jiahui kang Xuan Cheng Hui Gao Shujia Huo Haiwei Xu Key Lab of Visual Damage and Regeneration&Restoration of Chongqing Southwest Eye HospitalSouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

Müller glia,as prominent glial cells within the retina,plays a significant role in maintaining retinal homeostasis in both healthy and diseased *** lower vertebrates like zebrafish,these cells assume responsibility for spontaneous retinal regeneration,wherein endogenous Müller glia undergo proliferation,transform into Müller glia-derived progenitor cells,and subsequently regenerate the entire retina with restored ***,Müller glia in the mouse and human retina exhibit limited neural reprogramming.Müller glia reprogramming is thus a promising strategy for treating neurodegenerative ocular disorders.Müller glia reprogramming in mice has been accomplished with remarkable success,through various *** in molecular,genetic,epigenetic,morphological,and physiological evaluations have made it easier to document and investigate the Müller glia programming process in ***,there remain issues that hinder improving reprogramming efficiency and ***,understanding the reprogramming mechanism is crucial toward exploring factors that will improve Müller glia reprogramming efficiency,and for developing novel Müller glia reprogramming *** review describes recent progress in relatively successful Müller glia reprogramming *** also provides a basis for developing new Müller glia reprogramming strategies in mice,including epigenetic remodeling,metabolic modulation,immune regulation,chemical small-molecules regulation,extracellular matrix remodeling,and cell-cell fusion,to achieve Müller glia reprogramming in mice.

关键词： cell fusion chemical small-molecules epigenetic extracellular matrix immune metabolic mice Müller glia neurodegenerative diseases reprogramming retina regeneration

The autophagy-lysosome pathway:a potential target in the chemical and gene therapeutic strategies for Parkinson’s disease

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Neural Regeneration Research 2025年第1期20卷 139-158页

作者： Fengjuan Jiao Lingyan Meng kang Du Xuezhi Li School of Mental Health Jining Medical UniversityJiningShandong ProvinceChina Shandong Collaborative Innovation Center for Diagnosis Treatment and Behavioral Interventions of Mental DisordersInstitute of Mental HealthJining Medical UniversityJiningShandong ProvinceChina

Parkinson’s disease is a common neurodegenerative disease with movement disorders associated with the intracytoplasmic deposition of aggregate proteins such asα-synuclein in *** one of the major intracellular degradation pathways,the autophagy-lysosome pathway plays an important role in eliminating these *** evidence has shown that upregulation of the autophagy-lysosome pathway may contribute to the clearance ofα-synuclein aggregates and protect against degeneration of dopaminergic neurons in Parkinson’s ***,multiple genes associated with the pathogenesis of Parkinson’s disease are intimately linked to alterations in the autophagy-lysosome ***,this pathway appears to be a promising therapeutic target for treatment of Parkinson’s *** this review,we briefly introduce the machinery of ***,we provide a description of the effects of Parkinson’s disease–related genes on the autophagy-lysosome ***,we highlight the potential chemical and genetic therapeutic strategies targeting the autophagy–lysosome pathway and their applications in Parkinson’s disease.

关键词： autophagy chemical therapy gene therapy Parkinson’s disease α-synuclein

Deciphering the molecular mechanisms of Simiaowan in the treatment of hyperuricemia: in vivo and in silico approaches

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Traditional Medicine Research 2025年第2期10卷 37-54页

作者： Yong-Chang zeng Jun-Hong Wu Dan-Dan Xu kang He Chang-Qing Liu Li-Fei Song Zheng-Zhi Wu Qian-Qian Jiang Shao-Yu Liang Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518020China Pharmaceutical Department The Affiliated TCM Hospital of Guangzhou Medical UniversityGuangzhou 510000China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China Guangzhou Zeli Medical Technology Co. Ltd.Guangzhou 510700China

Background:Simiaowan(SMW),a well-known traditional Chinese medicine,has been employed to treat hyperuricemia(HUA)and gout for ***,the bioactive components and underlying mechanisms have not been *** objective of this study was to identify the active components and potential mechanisms of SMW by integrating pharmacological experimentation,serum pharmacochemistry,network pharmacology and molecular ***:HUA rats modelling by high-fat/high-sugar diet and potassium oxonate/adenine oral administration were used to evaluate the pharmacodynamic effects of ***-Q-Exactive-MS/MS was employed to detect the bioactive components present in SMW-containing *** pharmacology and molecular docking were utilized to elucidate the potential targets and underlying ***:SMW effectively ameliorated HUA rats via the inhibition of uric acid(UA)production,promotion of UA excretion,improvement of lipid and glucose metabolic abnormalities,antioxidant,anti-inflammatory and anti-insulin resistance effects.A total of 73 compounds detected in SMW-containing serum were identified as potential active components,with alkaloids,flavonoids,organic acids,and terpenoids emerging as the primary active *** 203 corresponding targets were obtained as SMW anti-HUA/gout targets,which mainly participated in apoptosis,insulin resistance,TNF,PI3K-Akt,HIF-1,NF-κB,MAPK,IL-17 and TLR signaling *** docking indicated that active compounds(***,phellodendrine,quercetin,formononetin,ferulic acid)had superior binding abilities to the key targets(*** carrier family 22 member 12(URAT1),solute carrier family 22 member 6(OAT1),ATP-binding cassette sub-family G member 2(ABCG2),solute carrier family 2,facilitated glucose transporter member 9(GLUT9),xanthine dehydrogenase/oxidase(XDH),transcription factor p65(RELA),toll-like receptor 4(TLR4),prostaglandin G/H synthase 2(PTGS2),caspase-3(CASP3),insulin(INS)).Conclusion:S

关键词： hyperuricemia network pharmacology serum pharmacochemistry Simiaowan UPLC-Q-Exactive-MS/MS

Potential role of tanycyte-derived neurogenesis in Alzheimer's disease

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Neural Regeneration Research 2025年第6期20卷 1599-1612页

作者： Guibo Qi Han Tang Jianian Hu Siying kang Song Qin Department of Anatomy Histologyand EmbryologySchool of Basic Medical SciencesFudan UniversityShanghaiChina State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina

Tanycytes, specialized ependymal cells located in the hypothalamus, play a crucial role in the generation of new neurons that contribute to the neural circuits responsible for regulating the systemic energy balance. The precise coordination of the gene networks controlling neurogenesis in naive and mature tanycytes is essential for maintaining homeostasis in adulthood. However, our understanding of the molecular mechanisms and signaling pathways that govern the proliferation and differentiation of tanycytes into neurons remains limited. This article aims to review the recent advancements in research into the mechanisms and functions of tanycyte-derived neurogenesis. Studies employing lineage-tracing techniques have revealed that the neurogenesis specifically originating from tanycytes in the hypothalamus has a compensatory role in neuronal loss and helps maintain energy homeostasis during metabolic diseases. Intriguingly,metabolic disorders are considered early biomarkers of Alzheimer's disease. furthermore,the neurogenic potential of tanycytes and the state of newborn neurons derived from tanycytes heavily depend on the maintenance of mild microenvironments, which may be disrupted in Alzheimer's disease due to the impaired blood–brain barrier ***, the specific alterations and regulatory mechanisms governing tanycyte-derived neurogenesis in Alzheimer's disease remain unclear. Accumulating evidence suggests that tanycyte-derived neurogenesis might be impaired in Alzheimer's disease, exacerbating neurodegeneration. Confirming this hypothesis, however, poses a challenge because of the lack of long-term tracing and nucleus-specific analyses of newborn neurons in the hypothalamus of patients with Alzheimer's disease. further research into the molecular mechanisms underlying tanycyte-derived neurogenesis holds promise for identifying small molecules capable of restoring tanycyte proliferation in neurodegenerative diseases. This line of investigation could pro

关键词： Alzheimer's disease blood–brain barrier ependymoglial cells hypothalamus metabolic diseases neural stem cells neurogenesis neuroinflammatory diseases neurons tanycyte