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Extracellular vesicles derived from mesenchymal stem cells mediate extracellular matrix remodeling in osteoarthritis through the transport of microRNA-29a

中国化学会第八届天然有机化学学术研讨会

作者： Wu Lun-xiu,Li Xian-zhen,he Ting-Yu,Li Chun-Yuan and Gu Wen-Xiang Department of Applied Chemistry,South China Agricultural University,Guangzhou 510642 China

＜正＞Myroporum bontioides ***,a member of the genus Myoporum,is a perennial evergreen shrub or arbor distributed in coastal districts in south *** is used as a folk medicine to treat pulmonary tuberculosis and other ...

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World Journal of Stem Cells 2024年第2期16卷 191-206页

作者： Fan Yang Wan-Qi Xiong Chen-Zhi Li Ming-Jian Wu xiu-Zhi Zhang Chun-Xiao Ran zhen-Hao Li Yan Cui Bao-Yi Liu De-Wei Zhao Department of Orthopedics Affiliated Zhongshan Hospital of Dalian UniversityDalian 116001Liaoning ProvinceChina

BACKGROUND Knee osteoarthritis(KOA)is a common orthopedic condition with an uncertain etiology,possibly involving genetics and *** like changes in chondrocyte microenvironment,oxidative stress,inflammation,and immune responses affect KOA ***-stage treatment options primarily target symptom *** stem cells(MSCs)show promise for treatment,despite *** research highlights microRNAs(miRNAs)within MSC-released extracellular vesicles that can potentially promote cartilage regeneration and hinder KOA *** suggests exosomes(Exos)as a promising avenue for future *** these findings emphasize the need for effective KOA progression management,further safety and efficacy validation for Exos is *** To explore miR-29a’s role in KOA,we’ll create miR-29a-loaded vesicles,testing for early treatment in rat *** Extraction of bone marrow MSC-derived extracellular vesicles,preparation of engineered vesicles loaded with miR-29a using ultrasonication,and identification using quantitative reverse transcription polymerase chain reaction;after establi-shing a rat model of KOA,rats were randomly divided into three groups:Blank control group injected with saline,normal extracellular vesicle group injected with normal extracellular vesicle suspension,and engineered extrace-llular vesicle group injected with engineered extracellular vesicle *** three groups evaluation,histological detection,and immunohistochemical detection to compare and evaluate the progress of various forms of *** General behavioral observation results showed that the extracellular vesicle group and engineered extracellular vesicle group had better performance in all four indicators of pain,gait,joint mobility,and swelling compared to the blank control ***,the engineered extracellular vesicle group had better pain relief at 4 wk and better knee joint mobility at 8 wk compared to the nor

关键词： Exosomes Osteoarthritis Mesenchymal stem cells MicroRNA-29a Intra-articular injection

Inhibition of Bcl-6 Expression Ameliorates Asthmatic Characteristics in Mice

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Current Medical Science 2024年第1期44卷 110-120页

作者： Chang-zhi ZHOU Xiong XIONG Wei-jun TAN Ya-fei WANG zhen YANG Xue-ying LI xiu-wen YANG Xiao-fan LIU Sun-feng YU Liang-chao WANG Shuang GENG Department of Respiratory and Critical Care Medicine The Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China Department of General Surgery Wuhan Wuchang HospitalWuhan University of Science and TechnologyWuhan 430063China

Objective The function of Bcl-6 in T follicular helper(Tfh)cell maturation is indispensable,and Tfh cells play a pivotal role in *** study investigated the impact of Bcl-6 on asthmatic *** The microscopic pathological alterations,airway resistance(AR),and lung compliance(LC)were determined in asthmatic mice and Bcl-6 interference *** surface molecular markers of Tfh cells and the Bcl-6 mRNA and protein expression were determined by flow cytometry,RT-qPCR,and Western blotting,*** relationships between the Tfh cell ratio and the IgE and IgG1 concentrations in peripheral blood mononuclear cells(PBMCs)and bronchoalveolar lavage fluid(BALF)were *** Asthmatic inflammatory changes were observed in the lung tissue and were attenuated by Bcl-6 siRNA and dexamethasone(DXM).Asthmatic mice exhibited an increased AR and a decreased LC,while Bcl-6 siRNA or DXM mitigated these *** percentages of Tfh cells and eosinophils were significantly increased in the asthmatic mice,and they significantly decreased after Bcl-6 inhibition or DXM ***-qPCR and Western blotting analyses revealed that the Bcl-6 expression level in PBMCs was significantly higher in asthmatic mice,and it decreased following Bcl-6 inhibition or DXM *** IgE expression in the serum and BALF and the B cell expression in PBMCs exhibited a similar *** asthmatic mice,the ratio of Tfh cells in the peripheral blood showed a strong positive correlation with the IgE levels in the serum and BALF,but not with the IgG1 *** The amelioration of airway inflammation and airway hyper-responsiveness is achieved through Bcl-6 suppression,which effectively hinders Tfh cell differentiation,ultimately resulting in a concurrent reduction in IgE production.

关键词： Bcl-6 Tfh asthma airway hyper-responsiveness mouse model

半无限介质多自由度频响函数离散时间有理近似的稳定参数识别

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工程力学 2024年第8期41卷 1-10页

作者：李鑫唐贞云杜修力北京工业大学城市与工程安全减灾教育部重点试验室北京100124

离散时间有理近似函数是将半无限土频响函数转化为时域模型的重要工具,离散时间有理近似函数和时域模型具有相同的稳定性和精度。目前关于离散时间有理近似函数的研究只针对于单自由度系统。该文基于线性控制理论,给出了多自由度有理近... 详细信息

离散时间有理近似函数是将半无限土频响函数转化为时域模型的重要工具,离散时间有理近似函数和时域模型具有相同的稳定性和精度。目前关于离散时间有理近似函数的研究只针对于单自由度系统。该文基于线性控制理论,给出了多自由度有理近似系统的稳定条件。将稳定性条件与遗传-序列二次算法相结合,开发了多自由度频响函数参数辨识方法,保证了多自由度系统的稳定性和精度。不同维度的多自由度有理近似系统的数值仿真验证了该文方法可以保证多自由度有理近似系统的稳定性和精度。

关键词：离散时间有理近似函数多自由度参数识别稳定性精度

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传感器管理的结构与微观传感器管理仿真

系统工程与电子技术 2004年第11期26卷 1581-1584页

作者：杨秀珍何友鞠传文海军航空工程学院信息融合技术研究所山东烟台264001 海军航空工程学院军械工程系山东烟台264001

传感器管理系统是信息融合系统的重要组成部分,是提高信息融合系统总体性能的保障。在给出传感器管理基本概念的基础上,讨论了传感器管理技术的难点与传感器管理的微观/宏观结构。利用一光电传感器模型对微观层的传感器管理———传感... 详细信息

传感器管理系统是信息融合系统的重要组成部分,是提高信息融合系统总体性能的保障。在给出传感器管理基本概念的基础上,讨论了传感器管理技术的难点与传感器管理的微观/宏观结构。利用一光电传感器模型对微观层的传感器管理———传感器控制进行了仿真研究,并讨论了传感器的控制原则。仿真结果表明,微观层的传感器管理可以使传感器对机动目标的跟踪精度得到明显改善。

关键词：传感器管理微观传感器传感器控制资源分配

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Neurosyphilis complicated by anti-γ-aminobutyric acid-B receptor encephalitis: A case report

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World Journal of Clinical Cases 2024年第11期12卷 1960-1966页

作者： Ya-xiu Fang Xiao-Ming Zhou Dong zheng Guang-Hui Liu Peng-Bo Gao Xiao-zhen Huang Zhi-Cheng Chen Hui Zhang Lin Chen Ya-Fang Hu Department of Neurology The Affiliated Brain Hospital of Guangzhou Medical UniversityGuangzhou 510000Guangdong ProvinceChina Department of Neurology Nanfang HospitalSouthern Medical UniversityGuangzhou 510000Guangdong ProvinceChina

BACKGROUND Syphilis is an infectious disease caused by Treponema pallidum that can invade the central nervous system,causing *** cases of anti-N-methyl-Daspartate receptor autoimmune encephalitis(AE)secondary to neurosyphilis have been *** report a neurosyphilis patient with anti-γ-aminobutyric acid-B receptor(GABABR)*** SUMMARY A young man in his 30s who presented with acute epileptic status was admitted to a local *** was diagnosed with neurosyphilis,according to serum and cerebrospinal fluid(CSF)tests for *** 14 d of antiepileptic treatment and anti-Treponema pallidum therapy with penicillin,epilepsy was controlled but serious cognitive impairment,behavioral,and serious psychiatric symptoms were *** was then transferred to our *** Mini-Mental State Examination(MMSE)crude test results showed only 2 *** magnetic resonance imaging revealed significant cerebral atrophy and multiple fluidattenuated inversion recovery high signals in the white matter surrounding both lateral ventricles,left amygdala and bilateral ***-GABABR antibodies were discovered in CSF(1:3.2)and serum(1:100).The patient was diagnosed with neurosyphilis complicated by anti-GABABR AE,and received methylprednisolone and *** treatment,his mental symptoms were *** impairment was significantly improved,with a MMSE of 8 *** anti-GABABR antibody titer decreased to 1:*** patient received methylprednisolone and penicillin after *** months later,the patient’s condition was stable,but the serum anti-GABABR antibody titer was 1:*** This patient with neurosyphilis combined with anti-GABABR encephalitis benefited from immunotherapy.

关键词： Anti-γ-aminobutyric acid-B receptor GABABR Neurosyphilis Tissue-based assay Magnetic resonance imaging Mini-mental state examination Case report

Dermatoscope for the diagnosis of erythema with purpura induced by lidocaine/prilocaine cream:A case report

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World Journal of Clinical Cases 2024年第22期12卷 5225-5228页

作者： xiu Lin Jin-Dou Jiang Xue-zhen Guo Kui-Kui Hu Department of Medical Aesthetics Guangdong Women and Children HospitalGuangzhou 511400Guangdong ProvinceChina

BACKGROUND Lidocaine/prilocaine(EMLA)cream is a local anesthetic that is applied to the skin or mucosa during painful therapeutic procedures with few reported side *** SUMMARY here,we report the use of dermatoscopy to identify a case of erythema with purpura,a rare side effect,after the application of 5%EMLA *** We conclude that erythema with purpura is caused by irritation and toxicity associated with EMLA,but the specific mechanism by which the toxic substance affects skin blood vessels is *** response to this situation and for cosmetic needs,we recommend tranexamic acid,in addition to routine therapy,to prevent changes in pigmentation in patients with dermatitis.

关键词： Erythema Purpura Lidocaine/prilocaine Dermatoscope Toxic reaction Case report

钙铝层状双氢氧化物(CaAl-LDH)对铅镉砷污染废水的吸附性能及机制研究

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Journal of Central South University 2024年第4期31卷 1292-1305页

作者：侯金凤孙倩郝秀珍 State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China College of Agricultural Sciences and Engineering Hohai UniversityNanjing 210098China

重金属污染普遍存在且日趋严重,解决阳离子和阴离子重金属共存的复合污染问题依然是一个严峻的挑战。本研究采用简便的原位共沉淀法制备了钙铝层状双氢氧化物(CaAl-LDH),用于去除水中的重金属离子。通过XRD、SEM、FTIR和XPS等表征方法研... 详细信息

重金属污染普遍存在且日趋严重,解决阳离子和阴离子重金属共存的复合污染问题依然是一个严峻的挑战。本研究采用简便的原位共沉淀法制备了钙铝层状双氢氧化物(CaAl-LDH),用于去除水中的重金属离子。通过XRD、SEM、FTIR和XPS等表征方法研究CaAl-LDH的制备及其对重金属离子的吸附机理。采用批吸附实验研究CaAl-LDH对Pb(Ⅱ)、Cd(Ⅱ)和As(Ⅴ)三种金属离子的吸附能力。结果表明,准一级动力学模型可以很好地拟合CaAl-LDH对三种重金属的吸附。吸附等温线结果表明,与Freundlich模型(R^(2)0.92)。Langmuir和Freundlich模型都能有效拟合Pb和As的吸附(R^(2)>0.90)。CaAl-LDH对Pb(Ⅱ)、Cd(Ⅱ)和As(Ⅴ)的最大吸附量分别为786.6、437.2和72.9 mg/g,并且在10 min内能够达到吸附平衡,反应快速高效。CaAl-LDH对铅、镉、砷的吸附机理各异。铅的吸附可能通过表面沉淀实现,而镉的吸附机理为同晶置换。至于As的吸附,可能涉及LDH层间的离子交换。该实验提供了一种对阴、阳离子重金属都具有高效吸附性能的LDH材料,并在重金属复合污染废水治理中显示出一定的应用潜力。

关键词：钙铝层状双氢氧化物(CaAl-LDH) 吸附重金属复合污染废水治理

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Distributed fixed-time observers for linear time-invariant systems

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Kongzhi yu Juece/Control and Decision 2024年第11期39卷 3664-3672页

作者： Zhang, Tan Wu, Huai-Yu Zhu, zhen-Hua zheng, xiu-Juan Guan, Zhi-Hong Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 China Institute of Robotics and Intelligent Systems Wuhan University of Science and Technology Wuhan 430081 China School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan 430074 China

A class of distributed fixed-time convergent observers is designed based on the bi-limit weighted homogeneous approximation theory and observability decomposition for the distributed state estimation of linear time-invariant systems. Firstly, for a single-input-single-output integrating chain system, a centralized fixed-time observer is designed for the system using bi-limit weighted homogeneous estimation. Then, the linear time-invariant system is decomposed into observable and unobservable subsystems based on the observability decomposition. Each agent in the sensor network reconstructs local observable sub-states in a fixed time based on the centralized observer by using only the system output measurements, and then state information between the agents is used to construct a consistent algorithm to estimate the local unobservable sub-states in a fixed time, thus realizing state omniscience in a fixed time. Unlike previous works, this paper does not need to construct a specific Lyapunov function to give an expression for the convergence time. Finally, the effectiveness of the designed observer is verified by simulations. © 2024 Northeast University. All rights reserved.

关键词： Lyapunov functions