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柴金解郁安神片调控CaMKII和Cofilin双信号通路改善抑郁症海马谷氨酸能神经元突触重塑
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作者 刘检 唐林 +5 位作者 赵洪庆 刘林 杨蕙 李薇 孟盼 王宇红 《中国药理学通报》 CAS CSCD 北大核心 2024年第8期1523-1532,共10页
目的探讨柴金解郁安神片调控钙/钙调蛋白依赖性蛋白激酶Ⅱ(CaMKII)和Cofilin双信号通路,改善抑郁症海马谷氨酸能神经元突触重塑的分子机制。方法皮质酮联合脂多糖建立抑郁症体外细胞模型,实验设正常组、模型组、GR阻断剂组、GR激动剂组... 目的探讨柴金解郁安神片调控钙/钙调蛋白依赖性蛋白激酶Ⅱ(CaMKII)和Cofilin双信号通路,改善抑郁症海马谷氨酸能神经元突触重塑的分子机制。方法皮质酮联合脂多糖建立抑郁症体外细胞模型,实验设正常组、模型组、GR阻断剂组、GR激动剂组、CX3CR1阻断剂组、CX3CR1激动剂组、柴金解郁安神片组、柴金解郁安神片联合GR激动剂组、柴金解郁安神片联合CX3CR1激动剂组,观察星形胶质细胞、小胶质细胞、前扣带皮层(anterior cingulate cortex,ACC)和海马神经元形态结构变化;检测ACC和海马谷氨酸能神经元激活及突触重塑情况;免疫荧光、Western blot分别检测海马谷氨酸能神经元内突触重塑相关谷氨酸受体2A(GRIN2A)、GRIN2B、CaMKII、MK2、Cofilin蛋白表达水平。结果柴金解郁安神片能明显改善胶质细胞、ACC和海马神经元损伤,并抑制ACC和海马谷氨酸能神经元异常激活,同时下调GRIN2A、GRIN2B、MK2蛋白,上调CaMKII、Cofilin蛋白,继而改善海马谷氨酸能神经元突触可塑性损伤和突触重塑。结论柴金解郁安神片能有效改善抑郁症海马谷氨酸能神经元突触重塑,其分子机制与调节突触重塑相关NR/CaMKII、MK2/Cofilin信号通路有关。 展开更多
关键词 抑郁症 谷氨酸能神经元 突触重塑 NR/CaMKII MK2/cofilin 柴金解郁安神片
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RhoA/cofilin通路激活破坏海马突触可塑性参与铝中毒致学习记忆障碍的机制研究
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作者 郭健雄 刘文静 +5 位作者 王小义 程厚之 张丽凤 廖素婵 李艳丽 黄俊杰 《中国临床新医学》 2024年第7期806-811,共6页
目的探讨RhoA/cofilin通路激活对海马突触可塑性的影响,及其在铝中毒致学习记忆障碍中的作用机制。方法从30只无特定病原体SD大鼠中随机选20只,予麦芽酚铝溶液腹腔注射2个月构建慢性铝中毒大鼠模型。将中毒模型大鼠分为铝中毒模型组(10... 目的探讨RhoA/cofilin通路激活对海马突触可塑性的影响,及其在铝中毒致学习记忆障碍中的作用机制。方法从30只无特定病原体SD大鼠中随机选20只,予麦芽酚铝溶液腹腔注射2个月构建慢性铝中毒大鼠模型。将中毒模型大鼠分为铝中毒模型组(10只)和RhoA抑制剂组(10只),后者予Rhosin盐酸盐腹腔注射30 d。剩余的10只正常大鼠作为空白对照组。通过Morris水迷宫实验检测大鼠的学习及记忆能力,应用透射电子显微镜观察大鼠海马CA1区突触超微结构的改变,通过实时荧光定量聚合酶链式反应(RT-qPCR)和免疫组化染色检测大鼠海马组织CA1区中RhoA、cofilin、PSD-95、SYN的定位表达情况。结果Morris水迷宫实验结果显示,铝中毒模型组大鼠潜伏期较空白对照组显著延长(P<0.05),RhoA抑制剂组大鼠的潜伏期较铝中毒模型组显著缩短(P<0.05)。RT-qPCR结果显示,与空白对照组相比,铝中毒模型组海马CA1区组织RhoA mRNA表达水平升高,cofilin mRNA、PSD-95 mRNA、SYN mRNA表达水平降低,差异有统计学意义(P<0.05);与铝中毒模型组相比,RhoA抑制剂组大鼠海马CA1区组织RhoA mRNA表达水平降低,cofilin mRNA、PSD-95 mRNA、SYN mRNA表达水平升高,差异有统计学意义(P<0.05)。免疫组化染色结果显示,与空白对照组相比,铝中毒模型组海马CA1区RhoA阳性细胞率增高,cofilin、PSD-95和SYN阳性细胞率降低,差异有统计学意义(P<0.05);与铝中毒模型组相比,RhoA抑制剂组海马CA1区RhoA阳性细胞率降低,cofilin、PSD-95和SYN阳性细胞率增高,差异有统计学意义(P<0.05)。透射电子显微镜观察结果显示,与空白对照组相比,铝中毒模型组中突触数量减少,突触后致密物质厚度变薄,突触间隙宽度变窄,差异有统计学意义(P<0.05);与铝中毒模型组相比,RhoA抑制剂组突触数量增多,突触后致密物质厚度增加,突触间隙宽度增加,差异有统计学意义(P<0.05)。相对于空白对照组,铝中毒模型组线粒体形态发生显著变化,RhoA抑制剂组的线粒体轻微膨胀,膜结构保持完好,线粒体形态及突触超微结构好于铝中毒模型组。结论铝中毒可通过激活RhoA/cofilin信号通路破坏海马突触可塑性,进而影响学习记忆能力。 展开更多
关键词 铝中毒 RhoA/cofilin信号通路 学习 记忆 海马突触可塑性 突触相关蛋白
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AURKA通过磷酸化Cofilin促脑胶质瘤细胞侵袭转移的作用研究
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作者 魏汝锐 张燕 +2 位作者 吴勤奋 苑杨 阿不都拉·艾沙 《脑与神经疾病杂志》 CAS 2024年第11期716-721,共6页
目的分析极光激酶A(AURKA)对神经胶质瘤细胞增殖、迁移与侵袭的影响及其作用机制。方法sh-AURKA和sh-Con(阴性对照)转染U87细胞;细胞计数试剂盒(CCK-8)和细胞侵袭实验(Transwell)法分析、敲低AURKA对神经胶质瘤细胞增殖、迁移和侵袭能... 目的分析极光激酶A(AURKA)对神经胶质瘤细胞增殖、迁移与侵袭的影响及其作用机制。方法sh-AURKA和sh-Con(阴性对照)转染U87细胞;细胞计数试剂盒(CCK-8)和细胞侵袭实验(Transwell)法分析、敲低AURKA对神经胶质瘤细胞增殖、迁移和侵袭能力的影响;蛋白印迹法检测敲低AURKA对神经胶质瘤细胞中丝切蛋白(Cofilin)相关蛋白表达的影响;将已转染sh-AURKA或sh-Con的U87细胞注射到BALB/c裸鼠颈部皮下,定期测量肿瘤体积,收集瘤体并称重。结果与sh-Con组比,sh-AURKA组的胶质瘤细胞增殖、迁移和侵袭能力显著降低(P<0.001);sh-AURKA组裸鼠体内的瘤体体积和瘤体质量明显降低(P<0.001),敲低AURKA后磷酸化Cofilin的表达明显升高。结论敲低AURKA能抑制胶质瘤细胞增殖、迁移和侵袭,其机制可能与增加Cofilin的磷酸化水平从而降低非磷酸化及AURKA的上皮间质转化机制有关。 展开更多
关键词 神经胶质瘤 极光激酶A 丝切蛋白
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PCDH17 restricts dendritic spine morphogenesis by regulating ROCK2-dependent control of the actin cytoskeleton,modulating emotional behavior 被引量:1
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作者 Laidong Yu Fangfang Zeng +14 位作者 Mengshu Fan Kexuan Zhang Jingjing Duan Yalu Tan Panlin Liao Jin Wen Chenyu Wang Meilin Wang Jialong Yuan Xinxin Pang Yan Huang Yangzhou Zhang Jia-Da Li Zhuohua Zhang Zhonghua Hu 《Zoological Research》 SCIE CSCD 2024年第3期535-550,共16页
Proper regulation of synapse formation and elimination is critical for establishing mature neuronal circuits and maintaining brain function.Synaptic abnormalities,such as defects in the density and morphology of posts... Proper regulation of synapse formation and elimination is critical for establishing mature neuronal circuits and maintaining brain function.Synaptic abnormalities,such as defects in the density and morphology of postsynaptic dendritic spines,underlie the pathology of various neuropsychiatric disorders.Protocadherin 17(PCDH17)is associated with major mood disorders,including bipolar disorder and depression.However,the molecular mechanisms by which PCDH17 regulates spine number,morphology,and behavior remain elusive.In this study,we found that PCDH17 functions at postsynaptic sites,restricting the number and size of dendritic spines in excitatory neurons.Selective overexpression of PCDH17 in the ventral hippocampal CA1 results in spine loss and anxiety-and depression-like behaviors in mice.Mechanistically,PCDH17 interacts with actin-relevant proteins and regulates actin filament(F-actin)organization.Specifically,PCDH17 binds to ROCK2,increasing its expression and subsequently enhancing the activity of downstream targets such as LIMK1 and the phosphorylation of cofilin serine-3(Ser3).Inhibition of ROCK2 activity with belumosudil(KD025)ameliorates the defective F-actin organization and spine structure induced by PCDH17 overexpression,suggesting that ROCK2 mediates the effects of PCDH17 on F-actin content and spine development.Hence,these findings reveal a novel mechanism by which PCDH17 regulates synapse development and behavior,providing pathological insights into the neurobiological basis of mood disorders. 展开更多
关键词 Synapse development Dendritic spine Mood disorder actin cytoskeleton Animal behavior
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Scinderin promotes glioma cell migration and invasion via remodeling actin cytoskeleton 被引量:1
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作者 Xin Lin Zhao Zhao +1 位作者 Shu-Peng Sun Wei Liu 《World Journal of Clinical Oncology》 2024年第1期32-44,共13页
BACKGROUND Glioma is one of the most common intracranial tumors,characterized by invasive growth and poor prognosis.Actin cytoskeletal rearrangement is an essential event of tumor cell migration.The actin dynamics-rel... BACKGROUND Glioma is one of the most common intracranial tumors,characterized by invasive growth and poor prognosis.Actin cytoskeletal rearrangement is an essential event of tumor cell migration.The actin dynamics-related protein scinderin(SCIN)has been reported to be closely related to tumor cell migration and invasion in several cancers.AIM To investigate the role and mechanism of SCIN in glioma.METHODS The expression and clinical significance of SCIN in glioma were analyzed based on public databases.SCIN expression was examined using real-time quantitative polymerase chain reaction and Western blotting.Gene silencing was performed using short hairpin RNA transfection.Cell viability,migration,and invasion were assessed using cell counting kit 8 assay,wound healing,and Matrigel invasion assays,respectively.F-actin cytoskeleton organization was assessed using F-actin staining.RESULTS SCIN expression was significantly elevated in glioma,and high levels of SCIN were associated with advanced tumor grade and wild-type isocitrate dehydrogenase.Furthermore,SCIN-deficient cells exhibited decreased proliferation,migration,and invasion in U87 and U251 cells.Moreover,knockdown of SCIN inhibited the RhoA/focal adhesion kinase(FAK)signaling to promote F-actin depolymerization in U87 and U251 cells.CONCLUSION SCIN modulates the actin cytoskeleton via activating RhoA/FAK signaling,thereby promoting the migration and invasion of glioma cells.This study identified the cancer-promoting effect of SCIN and provided a potential therapeutic target for the treatment of glioma. 展开更多
关键词 GLIOMA Scinderin actin cytoskeleton RhoA/FAK signaling DEPOLYMERIZATION
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Dynamics of perinuclear actin ring regulating nuclear morphology
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作者 Haoxiang YANG Houbo SUN +2 位作者 Jinghao SHEN Hao WU Hongyuan JIANG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2024年第8期1415-1428,共14页
Cells are capable of sensing and responding to the extracellular mechanical microenvironment via the actin skeleton.In vivo,tissues are frequently subject to mechanical forces,such as the rapid and significant shear f... Cells are capable of sensing and responding to the extracellular mechanical microenvironment via the actin skeleton.In vivo,tissues are frequently subject to mechanical forces,such as the rapid and significant shear flow encountered by vascular endothelial cells.However,the investigations about the transient response of intracellular actin networks under these intense external mechanical forces,their intrinsic mechanisms,and potential implications are very limited.Here,we observe that when cells are subject to the shear flow,an actin ring structure could be rapidly assembled at the periphery of the nucleus.To gain insights into the mechanism underlying this perinuclear actin ring assembly,we develop a computational model of actin dynamics.We demonstrate that this perinuclear actin ring assembly is triggered by the depolymerization of cortical actin,Arp2/3-dependent actin filament polymerization,and myosin-mediated actin network contraction.Furthermore,we discover that the compressive stress generated by the perinuclear actin ring could lead to a reduction in the nuclear spreading area,an increase in the nuclear height,and a decrease in the nuclear volume.The present model thus explains the mechanism of the perinuclear actin ring assembly under external mechanical forces and suggests that the spontaneous contraction of this actin structure can significantly impact nuclear morphology. 展开更多
关键词 mechanical force actin dynamics perinuclear actin ring compressive stress NUCLEUS
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Analysis and Review of Downregulated Actin Cytoskeletal Proteins in Non-Small Cell Lung Cancer
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作者 Hala M. Abdel Mageed Praveen Sahu Raji Sundararajan 《Journal of Biosciences and Medicines》 2024年第4期89-115,共27页
Actin, a highly conserved protein, plays a dominant role in Non-small cell lung cancer (NSCLC). Late diagnosis and the aggressive nature of NSCLC pose a significant threat. Studying the clinic pathological properties ... Actin, a highly conserved protein, plays a dominant role in Non-small cell lung cancer (NSCLC). Late diagnosis and the aggressive nature of NSCLC pose a significant threat. Studying the clinic pathological properties of NSCLC proteins is a potential alternative for developing treatment strategies. Towards this, 35 downregulated actin cytoskeletal proteins on NSCLC prognosis and treatment were studied by examining their protein-protein interactions, gene ontology enrichment terms, and signaling pathways. Using PubMed, various proteins in NSCLC were identified. The protein-protein interactions and functional associations of these proteins were examined using the STRING database. The focal adhesion signaling pathway was selected from all available KEGG and Wiki pathways because of its role in regulating gene expression, facilitating cell movement and reproduction, and significantly impacting NSCLC. The protein-protein interaction network of the 35 downregulated actin cytoskeleton proteins revealed that ACTG1, ACTR2, ACTR3, ANXA2, ARPC4, FLNA, TLN1, CALD1, MYL6, MYH9, MYH10, TPM1, TPM3, TPM4, PFN1, IQGAP1, MSN, and ZXY exhibited the highest number of interactions. Whereas HSPB1, CTNNA1, KRT17, KRT7, FLNB, SEPT2, and TUBA1B displayed medium interactions, while UTRN, TUBA1B, and DUSP23 had relatively fewer interactions. It was discovered that focal adhesions are critical in connecting membrane receptors with the actin cytoskeleton. In addition, protein kinases, phosphatases, and adapter proteins were identified as key signaling molecules in this process, greatly influencing cell shape, motility, and gene expression. Our analysis shows that the focal adhesion pathway plays a crucial role in NSCLC and is essential for developing effective treatment strategies and improving patient outcomes. 展开更多
关键词 Non-Small Cell Lung Cancer NSCLC actin actin Cytoskeletal Proteins Focal Adhesion KEEG Pathway
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miR-17-5p调控LIMK1/cofilin1通路对子宫内膜异位症发生发展的影响
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作者 李琳 贺冰 +2 位作者 张翼 马本玲 邢敏 《吉林医学》 CAS 2023年第7期1755-1759,共5页
目的:探究微小核糖核酸-17-5p(miR-17-5p)调控LIM激酶1(LIMK1)/丝切蛋白1(cofilin1)通路对子宫内膜异位症发生发展的影响。方法:选取行子宫切除术的30例子宫内膜异位症患者作为子宫内膜异位症在位内膜组,另选取30例非雌激素依赖性疾病... 目的:探究微小核糖核酸-17-5p(miR-17-5p)调控LIM激酶1(LIMK1)/丝切蛋白1(cofilin1)通路对子宫内膜异位症发生发展的影响。方法:选取行子宫切除术的30例子宫内膜异位症患者作为子宫内膜异位症在位内膜组,另选取30例非雌激素依赖性疾病患者作为正常子宫内膜组。对两组患者的在位内膜细胞中LIMK1、cofilin1表达量采用实时荧光定量PCR法检测,对所获取的在位内膜细胞进行转染,Transwell法检测细胞的侵袭能力;CCK-8法检测细胞的增殖能力;ELISA法检测子宫内膜细胞中细胞因子ICAM-1、VEGF、MMP-9表达。结果:在位内膜组患者的miR-17-5p表达水平低于正常子宫内膜组(P<0.05);在位内膜组的LIMK1蛋白及其mRNA、cofilin1蛋白及其mRNA相对表达水平均高于正常子宫内膜组(P<0.05);在位内膜组未转染组(EC组)及转染阴性对照(EC-C组)情况下细胞侵袭能力显著高于正常子宫内膜组(NC组),但转染情况下(EC-miR-17-5p-RNAi组)细胞侵袭能力显著低于正常子宫内膜组(NC-miR-17-5p-cDNA组),两组患者细胞转染阴性对照(EC-C组、NC-C组)与未转染状态(EC组、NC组)差异无统计学意义(P>0.05);转染情况在位内膜组患者(EC-miR-17-5p-RNAi组)细胞侵袭力低于未转染状态(EC组),但正常子宫内膜组(NC-miR-17-5p-cDNA组)高于未转染组(NC组,P>0.05)。EC组细胞增殖能力在24 h、48 h、72 h、96 h均高于NC组细胞(P<0.05);EC-miR-17-5p-RNAi组各时间段细胞增殖能力与EC组相比较均升高(P<0.05);EC组与EC-C组在各时间段的细胞增殖能力比较差异无统计学意义(P>0.05);NC-miR-17-5p-cDNA组在各时间段的增殖能力均低于NC组(P<0.05);NC-C组各时间段的细胞增殖能力与NC组比较差异无统计学意义(P>0.05)。基础状态下,EC组ICAM-1、MMP-9和VEGF水平高于NC组,EC-miR-17-5p-RNAi组与EC组比较明显升高(P<0.05);EC组与EC-C组各指标比较差异无统计学意义(P>0.05);NC组ICAM-1、MMP-9和VEGF水平明显高于NC-miR-17-5p-cDNA组(P<0.05),但与NC-C组比较差异无统计学意义(P>0.05)。结论:miR-17-5p在内异症细胞中表达水平下调,通过负向调控LIMK1/cofilin1通路抑制细胞增殖、侵袭,在内异症发生及进展过程中发挥基因调节功能。 展开更多
关键词 miR-17-5p LIMK1/cofilin1通路 子宫内膜异位症
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探究Ki67、p63、P504s、LIMK1、Cofilin免疫组化检测在前列腺诊断中的应用
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作者 陈咏梅 《系统医学》 2023年第11期10-13,共4页
目的 探究Ki67、p63、P504s、LIMK1、Cofilin免疫组化技术检测在前列腺病理诊断中的应用价值。方法选取2021年2月—2022年2月南通市第二人民医院收治的202例行早期穿刺及电切的前列腺患者为研究对象,依照病理诊断进行分组,其中良性前列... 目的 探究Ki67、p63、P504s、LIMK1、Cofilin免疫组化技术检测在前列腺病理诊断中的应用价值。方法选取2021年2月—2022年2月南通市第二人民医院收治的202例行早期穿刺及电切的前列腺患者为研究对象,依照病理诊断进行分组,其中良性前列腺增生(benign prostatic hyperplasia, BPH)组患者171例,前列腺癌(prostatic carcinoma,prostatic cancer, PCa)组患者31例,对两组样本中Ki67、p63、P504s、LIMK1及Cofilin等前列腺标志物相应阳性表达情况进行比较,以病理确诊结果作为金标准,统计各免疫指标诊断效能以及联合诊断效能。结果 与BPH组患者相比,PCa组患者的Ki67、P504s、LIMK1及Cofilin指标的表达水平显著更高,而p63表达量显著更低,差异有统计学意义(P<0.05)。Ki67、p63、LIMK13项指标单独检测PCa的灵敏度均达到90%以上;而P504s和Cofilin指标单独检测的灵敏度分别为83.87%、87.10%;Ki67、p63、P504s、LIMK1、Cofilin5项指标联合检测的灵敏度、特异度和准确度均较高,分别达到96.77%、98.24%和98.02%。结论 Ki67、p63、P504s、LIMK1及Cofilin等各前列腺癌的标志物均具有一定的阳性及阴性检出率,各免疫指标联合检测对前列腺癌的鉴别和诊断具有一定的参考和指导价值。 展开更多
关键词 免疫组化 KI67 P63 P504S LIMK1 cofilin 前列腺 病理诊断
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GCNT3通过PI3K/Akt/mTOR和RhoA/ROCK/Cofilin途径促进肝癌细胞增殖、迁移和侵袭(英文) 被引量:3
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作者 刘丽 王哲近 +4 位作者 潘邦伦 刘林 王刚林 李伟 金晶 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2023年第4期562-572,共11页
β-1,3-半乳糖-O-糖基-糖蛋白β-1,6-N-乙酰氨基葡萄糖转移酶(β-1,3-galactosyl-O-glycosyl-glycoproteinβ-1,6-N-acetylglucosaminyltransferase,GCNT3)是黏液蛋白质生物合成中不可缺少的一类N-乙酰葡萄糖转移酶。越来越多的证据表明... β-1,3-半乳糖-O-糖基-糖蛋白β-1,6-N-乙酰氨基葡萄糖转移酶(β-1,3-galactosyl-O-glycosyl-glycoproteinβ-1,6-N-acetylglucosaminyltransferase,GCNT3)是黏液蛋白质生物合成中不可缺少的一类N-乙酰葡萄糖转移酶。越来越多的证据表明,GCNT3的异常表达与肿瘤的侵袭以及病人的生存率有关,然而相关的研究仍较少报道。本研究旨在揭示GCNT3在调控肝细胞癌进程中的潜在机制。本研究首先利用高通量基因表达数据库(Gene Expression Omnibus,GEO)和癌症基因组图谱(Cancer Genome Atlas databases,TCGA)数据库分析肝癌和正常组织中GCNT3的mRNA表达水平,结果表明,肝癌组织中GCNT3的mRNA表达水平高于正常组织(P≤0.001)。同时利用免疫组化、Western印迹进一步分析了肝癌组织、癌旁组织、正常组织中GCNT3蛋白的表达,发现有30%肝癌组织GCNT3表达水平高于癌旁组织和正常组织。随后,在肝癌细胞系HCCLM3和Huh7细胞中,采用CCK-8、平板克隆、划痕实验、Transwell实验分析GCNT3对肝癌细胞增殖、迁移和侵袭能力的影响,结果显示,敲低GCNT3可抑制肝癌细胞的增殖、迁移和侵袭,而过表达GCNT3发挥相反作用。细胞周期和Western印迹结果显示,GCNT3调控G_(0/)G_1期关键蛋白质的表达来促进肝癌细胞周期G_1/S的转换。进一步探究发现,GCNT3可能通过激活PI3K/AKT/mTOR信号通路促进细胞增殖;以及GCNT3上调RhoA/ROCK/Cofilin通路关键蛋白质的表达来促进F-肌动蛋白(F-actin)的形成,从而参与细胞的迁移和侵袭。总之,本研究通过对GCNT3在肝癌细胞中的功能分析,初步证明,GCNT3与肝癌细胞增殖、迁移和侵袭中的功能有关,证实了GCNT3在肝癌临床治疗中的潜在价值,为肝癌治疗和诊断提供了新思路。 展开更多
关键词 β-1 3-半乳糖-O-糖基-糖蛋白β-1 6-N-乙酰氨基葡萄糖转移酶(GCNT3) 肝癌(HCC) PI3K/AKT/MTOR RhoA/ROCK/cofilin
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Regulation of actin cytoskeleton via photolithographic micropatterning 被引量:2
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作者 Fulin Xing Haimei Zhang +7 位作者 Mengyu Li Hao Dong Xuehe Ma Shiyu Deng Fen Hu Imshik Lee Leiting Pan Jingjun Xu 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS CSCD 2023年第2期50-57,共8页
Actin cytoskeleton plays crucial roles in various cellular functions.Extracellular matrix(ECM)can modulate cell morphology by remodeling the internal cytoskeleton.To define how geometry of ECM regulates the organizati... Actin cytoskeleton plays crucial roles in various cellular functions.Extracellular matrix(ECM)can modulate cell morphology by remodeling the internal cytoskeleton.To define how geometry of ECM regulates the organization of actin cytoskeleton,we plated individual NIH 3T3 cells on micropatterned substrates with distinct shapes and sizes.It was found that the stress fibers could form along the nonadhesive edges of T-shaped pattern,but were absent from the opening edge of V-shaped pattern,indicating that the organization of actin cytoskeleton was dependent on the mechanical environment.Furthermore,a secondary actin ring was observed on 50μm circular pattern while did not appear on 30μm and 40μm pattern,showing a size-dependent organization of actin cytoskeleton.Finally,osteoblasts,MDCK and A549 cells exhibited distinct organization of actin cytoskeleton on T-shaped pattern,suggesting a cell-type specificity in arrangement of actin cytoskeleton.Together,our findings brought novel insight into the organization of actin cytoskeleton on micropatterned environments. 展开更多
关键词 actin cytoskeleton PHOTOLITHOGRAPHY MICROPATTERNING extracellular matrix
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Inhibiting phosphatase and actin regulator 1 expression is neuroprotective in the context of traumatic brain injury 被引量:1
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作者 Yao Jing Lin Zhang +8 位作者 Shi-Wen Chen Yan Guo Shi-Ming Ju Fang Yuan Hao Chen Dian-Xu Yang Heng-Li Tian Zhi-Ming Xu Jun Ding 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第7期1578-1583,共6页
Studies have found that the phosphatase actin regulatory factor 1 expression can be related to stroke,but it remains unclear whether changes in phosphatase actin regulatory factor 1 expression also play a role in trau... Studies have found that the phosphatase actin regulatory factor 1 expression can be related to stroke,but it remains unclear whether changes in phosphatase actin regulatory factor 1 expression also play a role in traumatic brain injury.In this study we found that,in a mouse model of traumatic brain injury induced by controlled cortical impact,phosphatase actin regulatory factor 1 expression is increased in endothelial cells,neurons,astrocytes,and microglia.When we overexpressed phosphatase actin regulatory factor 1 by injection an adeno-associated virus vector into the contused area in the traumatic brain injury mice,the water content of the brain tissue increased.However,when phosphatase actin regulatory factor 1 was knocked down,the water content decreased.We also found that inhibiting phosphatase actin regulatory factor 1 expression regulated the nuclear factor kappa B signaling pathway,decreased blood-brain barrier permeability,reduced aquaporin 4 and intercellular adhesion molecule 1 expression,inhibited neuroinflammation,and neuronal apoptosis,thereby improving neurological function.The findings from this study indicate that phosphatase actin regulatory factor 1 may be a potential therapeutic target for traumatic brain injury. 展开更多
关键词 apoptosis aquaporin 4 blood brain barrier intercellular adhesion molecule 1 NEUROINFLAMMATION nuclear factor kappa B OCCLUDIN phosphatase and actin regulator-1 traumatic brain injury zonula occludens 1
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RP11-444D3.1与SOX5基因共表达激活cofilin/LIMK/Rac信号通路介导子宫内膜癌侵袭机制研究
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作者 姚田 马文娟 《陕西医学杂志》 CAS 2023年第4期390-394,共5页
目的:研究RP11-444D3.1与SOX5基因共表达对子宫内膜癌细胞Ishikawa侵袭的影响,并探究其分子机制。方法:通过过表达RP11-444D3.1和SOX5基因的腺病毒转染子宫内膜癌细胞Ishikawa,构建过表达RP11-444D3.1和SOX5基因及共表达RP11-444D3.1、S... 目的:研究RP11-444D3.1与SOX5基因共表达对子宫内膜癌细胞Ishikawa侵袭的影响,并探究其分子机制。方法:通过过表达RP11-444D3.1和SOX5基因的腺病毒转染子宫内膜癌细胞Ishikawa,构建过表达RP11-444D3.1和SOX5基因及共表达RP11-444D3.1、SOX5基因的子宫内膜癌细胞,通过实时定量PCR(qRT-PCR)检测细胞中RP11-444D3.1和SOX5基因mRNA表达水平,通过划痕实验和Transwell实验检测过表达RP11-444D3.1和SOX5基因的子宫内膜癌细胞的侵袭能力,并通过Western blot法检测cofilin/LIMK/Rac信号通路蛋白的相对表达量。结果:与子宫内膜癌细胞Ishikawa相比,过表达RP11-444D3.1与SOX5基因及共表达RP11-444D3.1、SOX5基因的子宫内膜癌细胞具有更强的侵袭能力(均P<0.05),同时,cofilin蛋白的表达降低,LIMK/Rac蛋白的磷酸化水平上调。结论:RP11-444D3.1与SOX5基因均可激活cofilin/LIMK/Rac信号通路,共表达可增强对cofilin/LIMK/Rac信号通路的激活作用,介导子宫内膜癌细胞侵袭。 展开更多
关键词 子宫内膜癌 RP11-444D3.1 SOX5 cofilin/LIMK/Rac信号通路 侵袭
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Bioprocess-inspired Actin Biomineralized Hematite Mesocrystals for Energy Storage
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作者 XU Wei ZHAO Chao +1 位作者 XIE Jingjing WANG Rongjie 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第6期1299-1303,共5页
Biomineralization is a biological process of synthesizing inorganic minerals within organisms.It has been found that intracellular proteins are involved in the room temperature synthesis process of anatase Ti O2in liv... Biomineralization is a biological process of synthesizing inorganic minerals within organisms.It has been found that intracellular proteins are involved in the room temperature synthesis process of anatase Ti O2in living mussels.Here,we used intracellular actin to synthesize hematite by biomineralization.Biomineralized hematite has a nano spindle structure with a particle size of approximately 150 nm.The microstructure indicates that the prepared hematite is a mesocrystals composed of ordered arrangement and assembly of primary nanoparticles.In addition,hematite mesocrystals exhibit good lithium storage performance as electrode materials for lithium batteries.The discharge specific capacity of the battery remained at 560.7 m Ah·g^(-1)after 130 cycles at a current density of 200 m A·g^(-1).This work expands the synthesis methods of hematite by biomineralization,and provides a new strategy for preparing inorganic materials by intracellular proteins. 展开更多
关键词 actin HEMATITE BIOMINERALIZATION MESOCRYSTALS lithium battery
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Holistic Approach in the Treatment of Actinic Keratosis: Benefits and Disadvantages of 5-Fluorouracil, Imiquimod, Diclofenac and Curaderm
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作者 Bill Elliot Cham 《International Journal of Clinical Medicine》 2023年第7期319-331,共13页
Background Actinic keratosis is the most prevalent premalignant skin disorder in the white population. Current guidelines provide no clear recommendations about preferred treatments. Methods The parameters;effectivene... Background Actinic keratosis is the most prevalent premalignant skin disorder in the white population. Current guidelines provide no clear recommendations about preferred treatments. Methods The parameters;effectiveness, treatment duration, recurrence, side effects and cost of treatment were investigated for three frequently used topical therapies which were then compared with a most recent developed topical therapy. Published clinical data obtained from the literature was used to compare these parameters for 5-fluorouracil, imiquimod and diclofenac and relate them with the newly developed Curaderm. Results A wide variation in the concentrations of the active anti-keratotic ingredients, application frequency, duration of treatment, recurrence rates and cost of treatment exist between the different topical therapies. The efficacy rates and side effects were less variable. Overall, Curaderm is the most suitable treatment for actinic keratosis. Clinical evidence is presented illustrating the effects of Curaderm on field-directed treatments and solitary treatments of actinic keratoses. Conclusions Current medical guidelines do not provide clear recommendations on which treatment approach for actinic keratosis is preferred. Direct head-to-head comparison between treatments with emphasis on efficacy, safety, treatment duration, compliance, convenience, cosmetic outcome, patient acceptance and cost should be available to the patient, the practising physician, healthcare system and should assist in therapeutic treatment guidelines and policymaking. Given the very favourable profiles of these parameters with Curaderm when compared with other home-based treatments, it should be considered that Curaderm is first-in-line. 展开更多
关键词 actinic Keratosis Skin Cancer 5-FLUOROURACIL IMIQUIMOD DICLOFENAC Curaderm EFFICACY RECURRENCE Cost
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防风提取物对IgE致敏肥大细胞的改善作用及机制研究 被引量:2
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作者 陈思思 钱丽梅 陈艳春 《浙江中医药大学学报》 CAS 2024年第2期138-146,共9页
[目的]探究防风(Saposhnikovia divaricata,SD)提取物对大鼠嗜碱性白血病细胞RBL-2H3脱颗粒的影响及作用机制。[方法]采用噻唑蓝(methylthialazole tetrazolium,MTT)比色法检测,根据5、25、50、100、200、400μg·mL^(-1)SD提取物对... [目的]探究防风(Saposhnikovia divaricata,SD)提取物对大鼠嗜碱性白血病细胞RBL-2H3脱颗粒的影响及作用机制。[方法]采用噻唑蓝(methylthialazole tetrazolium,MTT)比色法检测,根据5、25、50、100、200、400μg·mL^(-1)SD提取物对RBL-2H3细胞活性的影响,确定后续实验浓度。以免疫球蛋白E(immunoglobulinE,IgE)诱导建立RBL-2H3细胞脱颗粒模型。设立空白对照组、模型组、低剂量SD提取物组(5μg·mL^(-1))、中剂量SD提取物组(25μg·mL^(-1))、高剂量SD提取物组(50μg·mL^(-1))和地塞米松(dexamethasone,DXMS)组(100μg·mL^(-1)),干预30 min。MTT法检测低、中、高剂量SD提取物对RBL-2H3细胞脱颗粒模型活性的影响。甲苯胺蓝染色观察脱颗粒细胞形态,计算细胞脱颗粒率。免疫荧光染色测定细胞F-肌动蛋白(F-actin)表达。酶联免疫吸附试验(enzyme linked immunosorbent assay,ELISA)检测细胞β-氨基己糖苷酶、组胺、白细胞介素-4(interleukin-4,IL-4)、白细胞介素-6(interleukin-6,IL-6)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、干扰素-γ(interferon-γ,IFN-γ)水平。免疫印迹法检测细胞磷脂酰肌醇-3-羟基激酶(phosphoinositide-3 kinase,PI3K)、磷酸化-PI3K(phosphorylation-PI3K,p-PI3K)、蛋白激酶B(protein kinase B,AKT)、磷酸化-AKT(phosphorylation-AKT,p-AKT)、p38丝裂原活化蛋白激酶(p38 mitogen activited protein kinaseelisa,p38MAPK)、磷酸化-p38MAPK(phosphorylation-p38MAPK,p-p38MAPK)、核因子-κB(nuclear factor-κB,NF-κB)、磷酸化-NF-κB(phosphorylation-NF-κB,p-NF-κB)、细胞外调节激酶(extracellular regulated kinases,ERK)、磷酸化-ERK(phosphorylation-ERK,p-ERK)蛋白表达。[结果]低、中、高剂量防风提取物(5、25、50μg·mL^(-1))对RBL-2H3细胞活性无显著影响(P>0.05)。与空白对照组比较,模型组甲苯胺蓝染色细胞数量减少、形态变圆,细胞脱颗粒率显著上升,F-actin表达下降,β-氨基己糖苷酶、组胺、IL-4、IL-6、TNF-α水平升高,IFN-γ水平降低,p-PI3K/PI3K、p-AKT/AKT、p-p38MAPK/p38MAPK、p-NF-κB/NF-κB、p-ERK/ERK表达升高(P<0.01)。与模型组比较,低、中、高剂量SD提取物组和DXMS组细胞F-actin表达增加,β-氨基己糖苷酶、组胺、IL-4、IL-6、TNF-α释放显著下降(P<0.05,P<0.01),IFN-γ释放显著增加(P<0.01),p-PI3K/PI3K、p-AKT/AKT、p-p38MAPK/p38MAPK、p-NF-κB/NF-κB、p-ERK/ERK表达降低(P<0.05,P<0.01);中、高剂量SD提取物组和DXMS组细胞数量增加,形态多呈梭形,细胞脱颗粒率显著下降(P<0.01)。与低剂量SD提取物组比较,高剂量SD提取物组和DXMS组细胞脱颗粒率下降(P<0.01)、F-actin表达增加(P<0.05)、p-p38MAPK/p38MAPK表达降低(P<0.01)。[结论]SD提取物可抑制IgE致敏的RBL-2H3细胞脱颗粒,降低炎性介质水平,其作用机制可能与抑制PI3K/AKT、p38MAPK/NF-κB、ERK蛋白磷酸化有关。 展开更多
关键词 防风提取物 RBL-2H3细胞 细胞脱颗粒 F-肌动蛋白 组胺 炎症因子
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草地贪夜蛾β-Actin基因的原核表达及多克隆抗体制备
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作者 罗海玲 夏顺超 +1 位作者 卢琴 李海银 《山地农业生物学报》 2023年第2期81-85,共5页
草地贪夜蛾是一种重要的农业害虫,其迁飞性强、寄主广、繁殖力高,给我国农业经济带来了严重损失。从分子水平探究草地贪夜蛾生长、发育、繁殖、抗药性形成的内在分子机理,能为虫害的防治、防控提供重要参考。β-Actin作为一种高度保守... 草地贪夜蛾是一种重要的农业害虫,其迁飞性强、寄主广、繁殖力高,给我国农业经济带来了严重损失。从分子水平探究草地贪夜蛾生长、发育、繁殖、抗药性形成的内在分子机理,能为虫害的防治、防控提供重要参考。β-Actin作为一种高度保守的看家蛋白常在分子生物学中用作内参去定量目标蛋白的表达水平,因而获得高质量的β-Actin抗体是从事相关分子研究的基本前提。因此,本研究克隆了草地贪夜蛾β-Actin基因部分编码序列,长度为579 bp。利用原核表达系统诱导获得了约37 kD的β-Actin重组蛋白,将纯化后的重组蛋白免疫新西兰大白兔制备得到β-Actin多克隆抗体血清。经ELISA检测,获得的抗血清效价达1∶256000。利用制备的β-Actin抗血清进行Western blot试验,结果显示在42 kD处出现强且单一的蛋白条带,说明制备的β-Actin抗血清能有效识别草地贪夜蛾β-Actin蛋白。综上,本研究制备的β-Actin多克隆抗体效价高、特异性较强,能为草地贪夜蛾后续相关分子研究提供基本条件。 展开更多
关键词 草地贪夜蛾 Β-actin 原核表达 多克隆抗体
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铁死亡诱导剂RAS合成致死分子3抑制病理性瘢痕成纤维细胞的纤维化 被引量:1
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作者 沈江涌 贺茜 +6 位作者 唐玉婷 王建军 刘金毅 陈园园 王昕艺 刘彤 孙浩原 《中国组织工程研究》 CAS 北大核心 2024年第8期1168-1173,共6页
背景:病理性瘢痕主要表现为异常的细胞外基质积累和过度的成纤维细胞增殖,成纤维细胞过度增殖就会产生大量以胶原纤维为主的细胞外基质。因此深入探讨成纤维细胞纤维化在病理性瘢痕形成中的作用,将为揭示病理性瘢痕的机制和生物学治疗... 背景:病理性瘢痕主要表现为异常的细胞外基质积累和过度的成纤维细胞增殖,成纤维细胞过度增殖就会产生大量以胶原纤维为主的细胞外基质。因此深入探讨成纤维细胞纤维化在病理性瘢痕形成中的作用,将为揭示病理性瘢痕的机制和生物学治疗提供新思路。目的:探讨铁死亡诱导剂RAS合成致死分子3(RAS-selective lethal small molecule 3,RSL3)对人病理性瘢痕成纤维细胞纤维化的影响。方法:收集10例宁夏医科大学总医院烧伤整形美容科提供的病理性瘢痕组织和同一个体正常皮肤组织,提取人病理性瘢痕成纤维细胞和人正常皮肤成纤维细胞用于后续实验;苏木精-伊红染色观察病理性瘢痕组织和正常皮肤组织的形态;倒置显微镜观察病理性瘢痕成纤维细胞和正常皮肤成纤维细胞的外观形态;免疫荧光实验验证所提取的细胞是否为成纤维细胞;用不同浓度的RSL3(1,3,5,7,9,11,13μmol/L)干预细胞,CCK-8法检测RSL3作用于成纤维细胞的半数抑制浓度(IC_(50));设置对照组(不做处理)和RSL3干预组(用7μmol/L的RSL3干预细胞24 h),qRT-PCR和Western blot检测谷胱甘肽过氧化物酶4、Ⅰ型胶原蛋白、Ⅲ型胶原蛋白和α-平滑肌肌动蛋白的mRNA和蛋白的表达;检测细胞丙二醛浓度;划痕试验检测细胞划痕后24 h剩余划痕面积,并计算剩余划痕面积百分比。结果与结论:①与正常皮肤组相比,病理性瘢痕组的谷胱甘肽过氧化物酶4高表达(mRNA:t=3.252,P<0.01;蛋白:t=5.075,P<0.01);②与正常皮肤成纤维细胞组相比,病理性瘢痕成纤维细胞组的谷胱甘肽过氧化物酶4高表达(mRNA:t=10.32,P<0.01;蛋白:t=26.22,P<0.01);③与对照组相比,RSL3干预组谷胱甘肽过氧化物酶4表达减少(mRNA:t=2.798,P<0.05;蛋白:t=4.643,P<0.01),丙二醛浓度上升(t=2.917,P<0.05),Ⅰ型胶原蛋白(mRNA:t=15.84,P<0.01;蛋白:t=4.610,P<0.01)、Ⅲ型胶原蛋白(mRNA:t=28.86,P<0.01;蛋白:t=7.713,P<0.01)和α-平滑肌肌动蛋白(mRNA:t=2.671,P<0.05;蛋白:t=7.417,P<0.01)的表达减少,迁移能力减弱(t=14.06,P<0.01);④提示RSL3通过抑制谷胱甘肽过氧化物酶4的表达,进而抑制病理性瘢痕成纤维细胞的纤维化和迁移能力。 展开更多
关键词 病理性瘢痕 成纤维细胞 RSL3 谷胱甘肽过氧化物酶4 Α-平滑肌肌动蛋白 Ⅰ型胶原蛋白 Ⅲ型胶原蛋白 铁死亡 纤维化
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ACTN1在头颈部鳞癌中的表达及其与预后和免疫浸润的关系
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作者 王博 袁涛 +2 位作者 范瑞 吴光峰 江佳慧 《海南医学》 CAS 2024年第15期2171-2175,共5页
目的通过生物信息学方法探讨肌动蛋白a1(ACTN1)在头颈部鳞癌(HNSCC)中的表达及其与预后和免疫细胞浸润的关系。方法从TCGA数据库中下载头颈部鳞癌的数据集及分析ACTN1 mRNA在HNSCC组织中的表达情况,利用GEPIA数据库分析ACTN1 mRNA表达... 目的通过生物信息学方法探讨肌动蛋白a1(ACTN1)在头颈部鳞癌(HNSCC)中的表达及其与预后和免疫细胞浸润的关系。方法从TCGA数据库中下载头颈部鳞癌的数据集及分析ACTN1 mRNA在HNSCC组织中的表达情况,利用GEPIA数据库分析ACTN1 mRNA表达水平与预后的关系;采用HPA数据库分析HNSCC组织及正常组织中ACTN1蛋白表达水平及定位情况,TIMER数据库分析HNSCC组织中ACTN1表达水平与免疫细胞浸润程度的相关性,UALCAN数据库筛选HNSCC组织中与ACTN1的共表达基因,采用DAVID数据库对共表达基因进行GO和KEGG富集分析。结果与正常组织相比,HNSCC组织中ACTN1 mRNA表达水平明显升高,差异有统计学意义(P<0.05);与TP53基因未突变的HNSCC组织相比,TP53基因突变HNSCC组织中ACTN1 mRNA表达水平明显升高,差异有统计学意义(P<0.05)。ACTN1高表达和低表达组患者的中位生存时间分别为32.72个月和57.31个月,K-M曲线显示,ACTN1 mRNA高表达组总生存率相对更差(HR=1.500,P=0.002)。免疫组化结果显示,HPA数据库中4例HSNCC组织中ACTN1均为高表达,而1例正常口腔黏膜组织中ACTN1为低表达,ACTN1在HNSCC组织中主要表达于细胞质中,呈现棕黄色颗粒。在HNSCC中,ACTN1 mRNA表达水平与B细胞(r=-0.168,P<0.001)和CD8^(+)T细胞(r=-0.198,P<0.001)浸润程度呈明显负相关,与CD4^(+)T细胞(r=0.217,P<0.001)、巨噬细胞(r=0.099,P=0.030)、中性粒细胞(r=0.218,P<0.001)和树突状细胞(r=0.165,P<0.001)浸润程度呈显著正相关。在HNSCC中,与ACTN1具有显著正相关性和负相关性基因分别有1501个和258个。GO和KEGG富集分析结果显示,HNSCC组织中与ACTN1共表达的50个基因主要富集于上皮细胞迁移的调控及蛋白质转运、足细胞黏附、细胞-细胞连接等、钙粘着蛋白及肌动蛋白结合、肌动蛋白骨架的调控等。结论ACTN1在HNSCC组织中显著高表达,可作为HNSCC预后不良的标志物,ACTN1可能通过调节免疫细胞浸润参与HNSCC的发生发展。 展开更多
关键词 头颈部鳞癌 肌动蛋白a1 预后 标志物 免疫细胞浸润
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血清长链非编码RNA肌动蛋白纤维相关蛋白1-反义RNA1水平与钙化性主动脉瓣狭窄病人左心室功能的相关性研究
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作者 许国磊 吴宝 +3 位作者 吴欣芳 王吉元 姜北 侯玮琼 《安徽医药》 CAS 2024年第3期542-547,共6页
目的 分析血清长链非编码RNA(lncRNA)肌动蛋白纤维相关蛋白1-反义RNA1(AFAP1-AS1)表达水平与钙化性主动脉瓣狭窄(CAS)病人左心室收缩及舒张功能的相关性。方法 于2020年1月至2021年12月,选取中国中医科学院广安门医院就诊的CAS病人129... 目的 分析血清长链非编码RNA(lncRNA)肌动蛋白纤维相关蛋白1-反义RNA1(AFAP1-AS1)表达水平与钙化性主动脉瓣狭窄(CAS)病人左心室收缩及舒张功能的相关性。方法 于2020年1月至2021年12月,选取中国中医科学院广安门医院就诊的CAS病人129例作为CAS组[左心室射血分数(LVEF)≥50%],同期该院健康志愿者130例作为对照组。收集病人人口学资料、超声及实验室生化指标,检测血清lncRNA AFAP1-AS1表达。受试者操作特征曲线(ROC曲线)分析血清lncRNA AFAP1-AS1诊断CAS效能。结果 对照组血清lncRNA AFAP1-AS1表达水平(1.15±0.18)低于CAS组(1.58±0.30)(P<0.001)。轻度狭窄者血清lncRNA AFAP1-AS1表达水平(1.37±0.26)低于中、重度狭窄者,而中度狭窄者lncRNA AFAP1-AS1表达水平(1.59±0.30)低于重度狭窄者(1.79±0.34)(P<0.001)。ROC结果显示,血清lncRNA AFAP1-AS1诊断CAS、重度狭窄的曲线下面积分别为0.86[95%CI:(0.82,0.91)]、0.88[95%CI:(0.82,0.94)]。CAS组AVA水平低于对照组(P<0.001),左室舒张末期内径(LVEDD)、左室舒张末期容积(LVEDV)、室间隔厚度(IVST)、左室后壁厚度(LVPWT)、左房前后径(LAD)、主动脉瓣平均压差(PGmean)、主动脉瓣峰值流速(Vmax)水平高于对照组(均P<0.001)。相关性分析显示,血清lncRNA AFAP1-AS1与LVEDD、Vmax、二尖瓣口舒张早期血流速度峰值(E峰)、二尖瓣口舒张晚期血流速度峰值(A峰)、LVEDV、PGmean、LVESD呈正相关(r=0.60、0.66、0.72、0.68、0.56、0.57、0.50,均P<0.001),与LVEF、AVA呈负相关(r=-0.78、-0.62,均P<0.001)。结论 CAS病人血清lncRNA AFAP1-AS1表达水平升高,与CAS病情严重程度以及左心室舒张、收缩功能有关,并可作为无创血清标志物辅助临床诊断CAS。 展开更多
关键词 主动脉瓣狭窄 肌动蛋白纤维相关蛋白1-反义RNA1 钙质沉着症 左心室功能 严重程度 相关性
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