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己酮可可碱腹腔注射对1型糖尿病小鼠足溃疡的改善作用及其机制
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作者 王晓娟 曹海泉 《山东医药》 CAS 2024年第21期30-34,共5页
目的观察己酮可可碱腹腔注射对1型糖尿病(T1DM)小鼠足溃疡的改善作用,并探讨其作用机制。方法18只健康雄性SPF级小鼠随机分成3组:模型组、己酮可可碱组和贝复济组,每组6只。3组小鼠均制备T1DM足溃疡模型。制备成功后,己酮可可碱组小鼠... 目的观察己酮可可碱腹腔注射对1型糖尿病(T1DM)小鼠足溃疡的改善作用,并探讨其作用机制。方法18只健康雄性SPF级小鼠随机分成3组:模型组、己酮可可碱组和贝复济组,每组6只。3组小鼠均制备T1DM足溃疡模型。制备成功后,己酮可可碱组小鼠腹腔注射己酮可可碱连续14 d,贝复济组小鼠外喷贝复济连续14 d,模型组小鼠外用50%乙醇溶液连续14 d。取各组小鼠,在制备T1DM足溃疡模型当天和药物干预14 d时分别拍摄足溃疡创面处照片,计算创面愈合率。取各组小鼠,用血糖仪与医用血糖试纸检测尾静脉血FPG。取各组小鼠足溃疡处皮损组织,采用免疫荧光法测算皮损组织中中性粒细胞数量(以MPO阳性细胞数表示),采用免疫组化法测算皮损组织中NETs形成标志物Cit-H3阳性细胞占比,采用免疫荧光法评估皮损组织中NETs释放情况(以MPO+NE双阳性细胞数表示),采用ELISA法检测皮损组织中NETs相关标志物MPO、NE、LL37,采用流式细胞法检测皮损组织中ROS,采用Western blot法检测皮损组织中p38 MAPK、p-p38 MAPK、ERK1/2、p-ERK1/2蛋白。结果己酮可可碱组和贝复济组小鼠,足溃疡创面愈合率均高于模型组(P均<0.05)FPG水平、皮损组织中中性粒细胞数均低于模型组。己酮可可碱组和贝复济组小鼠皮损组织中Cit-H3阳性细胞占比、MPO+NE双阳性细胞数、ROS荧光强度和皮损组织中MPO、NE、LL37水平均低于模型组,且己酮可可碱组低于贝复济组(P均<0.05)。己酮可可碱组皮损组织中p38 MAPK、p-p38 MAPK、ERK1/2、p-ERK1/2蛋白相对表达量均高于模型组(P均<0.05),贝复济组皮损组织中p-p38 MAPK、p-ERK1/2蛋白相对表达量均高于模型组(P均<0.05),且己酮可可碱组皮损组织中p-p38 MAPK、ERK1/2、p-ERK1/2蛋白相对表达量均高于贝复济组(P均<0.05)。结论己酮可可碱腹腔注射可显著改善T1DM小鼠的足溃疡,其作用机制可能与降低FPG水平和中性粒细胞数、抑制NETs形成和释放、抑制ROS生成、激活p38MAPK/ERK信号通路有关。 展开更多
关键词 己酮可可碱 1型糖尿病 糖尿病足溃疡 中性粒细胞 中性粒细胞胞外诱捕网 p38 MAPK/ERK信号通路
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Noncanonical intercellular communication in immune response
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作者 Malgorzata Kloc Jacek Z Kubiak +1 位作者 Xian C Li Rafik M Ghobrial 《World Journal of Immunology》 2016年第1期67-74,共8页
The classical view of signaling between cells of immune system includes two major routes of intercellular communication:Through the release of extracellular molecules or a direct interaction between membrane bound rec... The classical view of signaling between cells of immune system includes two major routes of intercellular communication:Through the release of extracellular molecules or a direct interaction between membrane bound receptor and its membrane bound ligand,which initiate a cascade of signaling in target cell.However,recent studies indicate that besides these canonical modes of signaling there are also noncanonical routs of intercellular communications through membrane stripping/membrane exchange/trogocytosis,extracellular traps,exosomes and ectososmes/microparticles.In this review we discuss what are the components of noncanonical pathways of signaling and what role they play in immune cells interactions. 展开更多
关键词 TROGOCYTOSIS Membrane stripping extracellular traps EXOSOMES Ectososmes MICROPARTICLES
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中性粒细胞胞外诱捕网(NETs)的研究进展 被引量:7
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作者 关云艳 徐小东 《免疫学杂志》 CAS CSCD 北大核心 2014年第5期461-464,共4页
通常认为早期的感染是致病菌繁殖、传播的能力与宿主对致病菌隔离和杀灭的能力之间的较量。作为机体的第一道防线,中性粒细胞在感染初期的防御中起着重要作用。中性粒细胞杀灭病原体的方式主要为吞噬及脱颗粒作用,而最近又发现了另一种... 通常认为早期的感染是致病菌繁殖、传播的能力与宿主对致病菌隔离和杀灭的能力之间的较量。作为机体的第一道防线,中性粒细胞在感染初期的防御中起着重要作用。中性粒细胞杀灭病原体的方式主要为吞噬及脱颗粒作用,而最近又发现了另一种新的机制——中性粒细胞胞外诱捕网络(neutrophil extracellular traps,NETs)的形成。但研究证实NETs对我们的机体来说也是把双刃剑。本文就NETs的组成、影响其生成的因素及其对机体的利与弊做一概述。 展开更多
关键词 中性粒细胞胞外诱捕网 感染 自身免疫
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Applications of atomic force microscopy in immunology 被引量:1
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作者 Jiping Li Yuying Liu +1 位作者 Yidong Yuan Bo Huang 《Frontiers of Medicine》 SCIE CAS CSCD 2021年第1期43-52,共10页
Cellular mechanics,a major regulating factor of cellular architecture and biological functions,responds to intrinsic stresses and extrinsic forces exerted by other cells and the extracellular matrix in the microenviro... Cellular mechanics,a major regulating factor of cellular architecture and biological functions,responds to intrinsic stresses and extrinsic forces exerted by other cells and the extracellular matrix in the microenvironment.Cellular mechanics also acts as a fundamental mediator in complicated immune responses,such as cell migration,immune cell activation,and pathogen clearance.The principle of atomic force microscopy(AFM)and its three running modes are introduced for the mechanical characterization of living cells.The peak force tapping mode provides the most delicate and desirable virtues to collect high-resolution images of morphology and force curves.For a concrete description of AFM capabilities,three AFM applications are discussed.These applications include the dynamic progress of a neutrophil-extracellular-trap release by neutrophils,the immunological functions of macrophages,and the membrane pore formation mediated by perforin,streptolysin O,gasdermin D,or membrane attack complex. 展开更多
关键词 cellular mechanics atomic force microscopy neutrophil extracellular trap macrophage phagocytosis pore formation
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