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miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： Meng cong Jing-Jing Hu Yan Yu Xiao-Li Li Xiao-Ting Sun Li-Ting Wang Xia wu Ling-Jie Zhu Xiao-Jia Yang Qian-Ru He Fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

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合成多肽对结核分枝杆菌的胞内抑制作用

生物技术通报 2016年第4期32卷 222-227页

作者：陈吉殷玉和李玲玲金浩唐铭一吴丛梅长春工业大学化学与生命科学院长春130012

评价合成多肽对人白血病单核巨噬细胞THP-1的毒性和对结核分枝杆菌H37Rv的胞内抑菌作用。通过多肽的不同给药浓度,确定多肽对结核分枝杆菌的最小抑菌浓度(MIC),利用流式细胞术方法和MTT法检测2号肽对细胞THP-1的毒性作用,同时采用CFU方... 详细信息

评价合成多肽对人白血病单核巨噬细胞THP-1的毒性和对结核分枝杆菌H37Rv的胞内抑菌作用。通过多肽的不同给药浓度,确定多肽对结核分枝杆菌的最小抑菌浓度(MIC),利用流式细胞术方法和MTT法检测2号肽对细胞THP-1的毒性作用,同时采用CFU方法检测其对H37Rv菌株的胞内抑菌作用。筛选的4条多肽均有抑菌作用,其中2号肽的最小抑菌浓度(MIC)最小,为200μg/m L。2号肽与细胞THP-1作用时,浓度为1 200μg/m L时表现出细胞毒性,与INH细胞毒性无显著差别。对于胞内H37Rv,2号肽抗结核作用具有时间和剂量依赖效应,随给药时间和剂量的增加H37Rv菌落数明显下降。2号肽不仅对巨噬细胞THP-1的毒性小,而且具有较好的抗胞内结核分枝杆菌活性,是一种潜在的抗结核新型药物。

关键词：合成多肽结核杆菌巨噬细胞胞内抑菌

Sex-dependent alterations in extracellular vesicles linking chronic spinal cord injury to brain neuroinflammation and neurodegeneration

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Neural Regeneration Research 2025年第2期20卷 483-484页

作者： Yun Li Junfang wu Department of Anesthesiology&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumatic spinal cord injury(SCI)is a devastating exogenous injury with long-lasting consequences and a leading cause of death and disability *** in assistive technology,rehabilitative interventions,and the ability to identify and intervene in secondary conditions have significantly increased the long-term survival rate of SCI patients,with some people even living well into their seventh or eighth *** survival changes have led neurotrauma researchers to examine how SCI interacts with brain *** health and epidemiological data showed that patients with long-term SCI can have a lower life expectancy and quality of life,along with a higher risk of comorbidities and complications.

关键词： alterations inflammation injury

辐射诱导pcDNA3.1-Egr.1p-p16对JF305细胞周期和凋亡的影响

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南方医科大学学报 2007年第8期27卷 1183-1186页

作者：马红兵王西京马洁夏辉王铮李琤韩志楷吴丛梅西安交通大学医学院第二医院肿瘤科陕西西安710004 中国医学科学院肿瘤研究所分子肿瘤学国家重点实验室北京100021 汕头大学医学院生物教研室广东汕头515031

目的检测pcDNA3.1-Egr.1p-p16质粒对胰腺癌细胞JF305凋亡和细胞周期变化的影响。方法进行人胰腺癌JF305细胞培养,脂质体LipofectamineTM2000转染pcDNA3.1-Egr.1p-p16重组质粒,6MV-X射线4Gy照射(剂量率2.50Gy/min),流式细胞术检测细胞周期和细胞凋亡状况。结果pcDNA3.1-Egr.1p-p16质粒转染组和pcDNA3.1-Egr.1p-p16质粒转染+4Gy照射组的JF305细胞中早期凋亡细胞分别占6.4%、10.4%,晚期凋亡或继发性死亡细胞分别占16.8%、33.8%,均较阴性对照组显著升高(P<0.05)。质粒转染+4Gy照射组总的凋亡率高于单纯质粒转染组(P<0.05)。辐射明显导致JF-305细胞G2期阻滞。pcDNA3.1-p16质粒和pcDNA3.1-Egr.1p-p16质粒基因转染,可使JF-305细胞阻滞于G1期。当给予细胞4Gy照射后,两质粒转染组,阻滞于G1期细胞变化不大,阻滞于G2期的细胞有所增加。结论pcDNA3.1-Egr.1p-p16可致JF-305细胞凋亡,与放射联合增加了细胞凋亡率。转染pcDNA3.1-Egr.1p-p16可使细胞阻滞于G1期,联合辐射,增加了细胞的G2期阻滞。

关键词：胰腺癌质粒细胞周期凋亡

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吲哚喹唑啉衍生物的合成与表征

化学试剂 2011年第10期33卷 883-886页

作者：韩爽李东风吴丛梅马欣荣宋镕光王云长春工业大学化学与生命科学学院吉林长春130012

以苯胺衍生物为原料,经缩合、环化反应合成靛红衍生物,用所合成的靛红衍生物与靛红酸酐缩合得到色胺酮衍生物,再经肟化、酯化、Williamson反应合成了6种新的6-肟醚(酯)基吲哚喹唑啉类化合物。用元素分析、1HNMR、MSI、R对合成产物的结... 详细信息

以苯胺衍生物为原料,经缩合、环化反应合成靛红衍生物,用所合成的靛红衍生物与靛红酸酐缩合得到色胺酮衍生物,再经肟化、酯化、Williamson反应合成了6种新的6-肟醚(酯)基吲哚喹唑啉类化合物。用元素分析、1HNMR、MSI、R对合成产物的结构通过表征,确定了化合物结构。

关键词：吲哚喹唑啉合成衍生物

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响应面法优化文冠果油脱色工艺的研究

化学与生物工程 2013年第1期30卷 79-83页

作者：吴丛梅赵先花杨爽高冷长春工业大学化学与生命科学学院吉林长春130012

探讨了文冠果油用复合脱色剂(活性白土/活性炭)脱色的工艺条件。在单因素实验的基础上,以脱色温度、脱色时间、脱色剂用量和搅拌速率为自变量,脱色率为响应值,采用Box-Behnken实验设计方法,考察各变量及其交互作用对脱色率的影响,利用De... 详细信息

探讨了文冠果油用复合脱色剂(活性白土/活性炭)脱色的工艺条件。在单因素实验的基础上,以脱色温度、脱色时间、脱色剂用量和搅拌速率为自变量,脱色率为响应值,采用Box-Behnken实验设计方法,考察各变量及其交互作用对脱色率的影响,利用Design Expert软件模拟得到回归方程的预测模型。确定文冠果油的最佳脱色条件为:脱色温度50℃、脱色时间31min、脱色剂用量4%、搅拌速率***-1,在此条件下,脱色率为90.38%。

关键词：文冠果油脱色响应面法

UPLC-Q Exactive Plus-MS分析高粱壳化学成分及黄嘌呤氧化酶体外抑制活性筛选

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应用化学 2023年第11期40卷 1587-1594页

作者：张瀚水龚本义南敏伦赫玉芳赵昱玮吴丛梅殷玉和长春工业大学化学与生命科学学院长春130012 吉林省中医药科学院植物化学研究所长春130012 长春中医药大学健康管理学院长春130117

采用高效液相色谱串联四极杆静电场轨道阱质谱对高粱壳中的化学成分进行分析鉴定,并通过高效液相色谱法筛选抑制黄嘌呤氧化酶活性成分。该实验使用Hypersil GOLD C_(18)色谱柱(2.1 nm×30 nm,3μm),以0.1%甲酸水(A)-乙腈(B)进行梯度洗脱... 详细信息

采用高效液相色谱串联四极杆静电场轨道阱质谱对高粱壳中的化学成分进行分析鉴定,并通过高效液相色谱法筛选抑制黄嘌呤氧化酶活性成分。该实验使用Hypersil GOLD C_(18)色谱柱(2.1 nm×30 nm,3μm),以0.1%甲酸水(A)-乙腈(B)进行梯度洗脱,流速1.0 m L/min,进样量10μL。质谱分析采用ESI离子源,在正离子模式下采集数据,利用Xcalibur 4.1软件结合数据库对所得数据进行分析,共鉴定出27种化学成分。对刺槐素、葛根素、芹菜素、根皮苷、异鼠李素和3,3’,4’,7-四羟基黄酮6种化学成分进行活性筛选,发现芹菜素和3,3’,4’,7-四羟基黄酮对黄嘌呤氧化酶(XO)表现出较强的抑制活性,IC_(50)分别为18.11和34.59μmol/L。

关键词：高粱壳化学成分鉴定质谱碎裂机理黄嘌呤氧化酶抑制活性成分

A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

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Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China State Grid Information&Communication Company of Hunan Electric Power Corporation Changsha410118China State Grid Hunan Electric Power Corporation Chenzhou Power Supply Branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security

Hourglass-GCN for 3D Human Pose Estimation Using Skeleton Structure and View Correlation

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Computers, Materials & Continua 2025年第1期82卷 173-191页

作者： Ange Chen Chengdong wu Chuanjiang Leng Faculty of Robot Science and Engineering Northeastern UniversityShenyang110169China

Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton structure information is not utilized and multi-view pose information is not completely ***,existing graph convolutional operations do not consider the specificity of different joints and different views of pose information when processing skeleton graphs,making the correlation weights between nodes in the graph and their neighborhood nodes *** Graph Convolutional Networks(GCNs)cannot extract global and deeplevel skeleton structure information and view correlations *** solve these problems,pre-estimated multiview 2D poses are designed as a multi-view skeleton graph to fuse skeleton priors and view correlations explicitly to process occlusion problem,with the skeleton-edge and symmetry-edge representing the structure correlations between adjacent joints in each viewof skeleton graph and the view-edge representing the view correlations between the same joints in different *** make graph convolution operation mine elaborate and sufficient skeleton structure information and view correlations,different correlation weights are assigned to different categories of neighborhood nodes and further assigned to each node in the *** on the graph convolution operation proposed above,a Residual Graph Convolution(RGC)module is designed as the basic module to be combined with the simplified Hourglass architecture to construct the Hourglass-GCN as our 3D pose estimation ***-GCNwith a symmetrical and concise architecture processes three scales ofmulti-viewskeleton graphs to extract local-to-global scale and shallow-to-deep level skeleton features *** results on common large 3D pose dataset Human3.6M and MPI-INF-3DHP show that Hourglass-GCN outperforms some excellent methods in 3D pose estimati

关键词： 3D human pose estimation multi-view skeleton graph elaborate graph convolution operation Hourglass-GCN