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Effect of serum concentration on adhesion of monocytic THP-1 cells onto cultured EC monolayer and EC-SMC co-culture 被引量:1
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作者 Li-jie FAN Takeshi KARINO 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2008年第8期623-629,共7页
Background:The adhesion of monocytes to the endothelium following accumulation of low-density lipoprotein (LDL) in subendothelial spaces is an important step in the development of intimal hyperplasia in arterially imp... Background:The adhesion of monocytes to the endothelium following accumulation of low-density lipoprotein (LDL) in subendothelial spaces is an important step in the development of intimal hyperplasia in arterially implanted vein grafts and atherosclerosis in both animals and humans. However, it is not well known how serum factors affect the adhesion of monocytes. Methods: We have studied the effect of fetal calf serum (FCS), which we considered a source of LDL, on the adhesion of monocytes to endothelial cells (ECs) by using human monocytic THP-1 cells and both a monolayer of cultured bovine aortic endothelial cells (EC monoculture) and a co-culture with bovine aortic smooth muscle cells (EC-SMC co-culture). Results: It was found that the addition of FCS to the medium greatly affected the adhesion of THP-1 cells, and the higher the concentration of FCS in the medium, the greater the adhesion of THP-1 cells to endothelial cells. Adhesion of THP-1 cells to an EC-SMC co-culture was approximately twofold greater than that to an EC monoculture, and after adhering to endothelial cells, many THP-1 cells trans-migrated into the layer of smooth muscle cells. Conclusion: The results suggest that the elevation of the LDL (cholesterol) level in blood provides a favorable condition for the development of intimal hyperplasia and atherosclerosis by promoting the adhesion of monocytes to the endothelium and their subsequent migration into subendothelial spaces. 展开更多
关键词 Endothelial cells (ECs) Smooth muscle cells (SMCs) MONOCYTE thp-1 cells Low-density lipoprotein (LDL) Adhesion Transendothelial migration Serum concentration
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Malarial pigment enhances heat shock protein-27 in THP-1 cells:new perspectives for in vitro studies on monocyte apoptosis prevention 被引量:1
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作者 Mauro Prato Valentina Gallo +3 位作者 Elena Valente Amina Khadjavi Giorgia Mandili Giuliana Giribaldi 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第12期934-938,共5页
Objective:To investigate the effect of malarial pigment(hemozoin,HZ) on expression of heat shock proteins(HSPs) and cell viability in human monocytes by using a stable cell line(THP-1 cells).Methods:THP-1 cells were f... Objective:To investigate the effect of malarial pigment(hemozoin,HZ) on expression of heat shock proteins(HSPs) and cell viability in human monocytes by using a stable cell line(THP-1 cells).Methods:THP-1 cells were fed with native HZ or treated with pro-apoptotic molecule gliotoxin for 9 h.Thereafter,the protein expression of HSP-27 and HSP-70 was evaluated by western blotting.Alternatively,HZ-fed cells were cultured up to 72 h and cell viability parameters(survival,apoptosis and necrosis rates) were measured by flow cytometric analysis. Results:HZ increased basal protein levels of HSP-27 without altering those of HSP-70 in THP-1 cells,and promoted long-term cell survival without inducing apoptosis.As expected,gliotoxin inhibited HSP-27 protein expression and promoted long-term cell apoptosis.Conclusions: Present data show that HZ prevents cell apoptosis and enhances the expression of anli-apoptotic HSP-27 in THP-1 cells,confirming the previous evidences obtained from HZ-fed immunopurified monocytes.Since the use of a stable cell line is pivotal to perform HSP-27 silencing experiments, monocytic THP-1 cells could be a good candidate line for such an approach,which is heavily required to clarify the role of HSP-27 in survival of impaired HZ-fed monocytes during falciparum malaria. 展开更多
关键词 HEMOZOIN PLASMODIUM FALCIPARUM Malaria MONOCYTE thp-1 cells Phagocytosis APOPTOSIS Heat shock protein-27
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Salidroside Attenuates LPS-stimulated Activation of THP-1 Cell-derived Macrophages through Down-regulation of MAPK/NF-kB Signaling Pathways 被引量:9
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作者 王洪武 吴婷 +3 位作者 齐俊英 王亚琦 罗小平 宁琴 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2013年第4期463-469,共7页
Summary: Excessive activation of macrophages is implicated in various inflammatory injuries. Salidroside (Sal), one of the main bioactive components ofRhodiola Sachalinensis, has been reported to possess anti-infla... Summary: Excessive activation of macrophages is implicated in various inflammatory injuries. Salidroside (Sal), one of the main bioactive components ofRhodiola Sachalinensis, has been reported to possess anti-inflammatory activities. This study aimed to examine the effect of Sal on the activa- tion of macrophages and the possible mechanism. The lipopolysaccharide (LPS)-stimulated phrobol 12-myristate 13-acetate (PMA)-differentiated THP-1 macrophage models were established. The changes in the inflammatory profiles of THP-l-derived macrophages were determined. The results showed that Sal significantly decreased the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX2), interleukin-lbeta (IL-1β), interleukin-6 (IL-6) and tumor necrosis fac- tor-or (TNF-a) at both mRNA and protein levels in THP-l-derived macrophages, and the effect was dose-depedent. Moreover, NF-B activation was significantly suppressed and the phosphorylation of ERK, p38 and JNK was substantially down-regulated after Sal treatment. The findings suggested that Sal can suppress the activation of LPS-stimulated PMA-differetiated THP-1 cells, as evidenced by the decreased expression of iNOS, COX2, IL-1β, IL-6 and TNF-a, and the mechanism involves the inhibition of NF-r,B activation and the phosphorylation of the MAPK signal pathway. 展开更多
关键词 SALIDROSIDE thp-1 MAPK LPS NF-KB
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IL-10 Enhances Promoter Activity of ILT4 Gene and Up-regulates Its Expression in THP-1 Cells
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作者 徐小丽 邹萍 +2 位作者 陈莉娟 靳冠楠 周浩 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2010年第5期594-598,共5页
This study examined the effect of IL-10 on immunoglobulin-like transcript (ILT4) expression of human monocytic leukemic cell line THP-1, especially the role of the ILT4 promoter activity.ILT4 promoter area was amplifi... This study examined the effect of IL-10 on immunoglobulin-like transcript (ILT4) expression of human monocytic leukemic cell line THP-1, especially the role of the ILT4 promoter activity.ILT4 promoter area was amplified by PCR, and was cloned into the eukaryotic expressing vector pGL3-Basic.The pGL3-ILTP obtained was tested by double endonuclease digestion and sequencing.Then, the recombinant plasmid was transfected into THP-1 cells by using lipofectamine.After culture with IL-10 for 12 h, the mRNA extracted from THP-1 cells was detected by RT-PCR and the protein was detected by FACS.The dual-luciferase reporter assay system was employed to detect the activity of ILT4 promoter with or without IL-10.The results showed that the activity of pGL3-ILTP was significantly increased and was more than ten times that of pGL3-Basic cells.After culture with IL-10 for 12 h, the expression of ILT4 protein and its mean fluorescence intensity (MFI) were increased.Moreover, the mRNA was remarkably higher than that of the control group.Dual-luciferase reporter assay revealed that ILT4 promoter was much more activated after being treated with IL-10.We were led to conclude that pGL3-ILTP containing ILT4 promoter was constructed successfully.The expression of ILT4 could be up-regulated by IL-10 both at the transcriptional and translational level.Furthermore, ILT4 promoter could be much more active after addition of IL-10.This study suggests that IL-10 up-regulates ILT4 expression on monocytes via increasing ILT4 gene promoter activity, which may have implication for inducing transplantation tolerance in clinical practice. 展开更多
关键词 IL-10 ILT4 thp-1 immune tolerance PROMOTER
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FHL2通过NF-κB信号通路调节THP-1巨噬细胞泡沫化
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作者 陈卫卫 廖煌 +1 位作者 史振鸿 罗颖 《基础医学与临床》 2024年第2期204-209,共6页
目的 明确4个半LIM结构域蛋白(FHL2)是否能够通过调节核因子κB(NF-κB)信号通路影响巨噬细胞泡沫化。方法 构建FHL2过表达质粒及合成FHL2小干扰RNA(si-FHL2),分别转染至人单核/巨噬细胞系THP-1中,Western blot检测FHL2表达;使用氧化低... 目的 明确4个半LIM结构域蛋白(FHL2)是否能够通过调节核因子κB(NF-κB)信号通路影响巨噬细胞泡沫化。方法 构建FHL2过表达质粒及合成FHL2小干扰RNA(si-FHL2),分别转染至人单核/巨噬细胞系THP-1中,Western blot检测FHL2表达;使用氧化低密度脂蛋白(ox-LDL)刺激细胞,ELISA检测细胞IL-6、IL-1β、TNF-α等细胞因子的表达;油红O染色检测细胞泡沫化程度;Western blot检测NF-κB信号通路相关蛋白表达。结果 转染过表达FHL2质粒的细胞中FHL2表达量升高(P<0.01),而转染si-FHL2的细胞表达量降低(P<0.05);敲低FHL2能够下调炎性细胞因子的分泌(P<0.01);FHL2下调能够缓解THP-1巨噬细胞泡沫化;同时,FHL2下调抑制NF-κB信号通路的活化(P<0.05),而在过表达FHL2组中结果呈相反趋势。结论 下调FHL2的表达可通过抑制NF-κB信号通路活化,降低炎性细胞因子的分泌,缓解巨噬细胞的泡沫化。 展开更多
关键词 4个半LIM结构域蛋白(FHL2) NF-ΚB信号通路 thp-1 巨噬细胞泡沫化
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基于CRISPR/Cas9技术构建IDO1基因敲除的THP-1细胞株及其表型研究
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作者 李雪银 吴传新 +3 位作者 刘慧玲 李丽 程莎 孙航 《免疫学杂志》 CAS CSCD 2024年第1期87-95,共9页
目的 采用CRISPR/Cas9技术构建吲哚胺-2,3-双加氧酶1(IDO1)基因敲除的THP-1细胞株,为研究IDO1在巨噬细胞中的作用提供细胞模型。方法 设计靶向IDO1基因的3条向导RNA(guide RNA,gRNA),分别构建IDO1-gRNA重组质粒,酶切及测序鉴定后,包装成... 目的 采用CRISPR/Cas9技术构建吲哚胺-2,3-双加氧酶1(IDO1)基因敲除的THP-1细胞株,为研究IDO1在巨噬细胞中的作用提供细胞模型。方法 设计靶向IDO1基因的3条向导RNA(guide RNA,gRNA),分别构建IDO1-gRNA重组质粒,酶切及测序鉴定后,包装成Lenti-IDO1-gRNA慢病毒。利用Cas9慢病毒感染THP-1细胞获得稳定表达Cas9蛋白的细胞株,再经Lenti-IDO1-gRNA慢病毒感染敲除IDO1基因,有限稀释法获得单克隆细胞株。T7E1酶切检测gRNA打靶效率,PCR产物测序和Western blot鉴定IDO1基因敲除效果。CCK8法检测IDO1基因敲除对THP-1细胞增殖活性的影响,流式细胞术检测对巨噬细胞标志物CD11b、CD68和CD14表达的影响,中性红法检测巨噬细胞吞噬功能。结果 成功构建了3种IDO1-gRNA重组质粒,3条gRNA均能有效编辑IDO1基因,以gRNA2编辑效率最高。经PCR产物测序和Western blot验证获得了3株THP-1 IDO1-KO单克隆细胞株,并发现IDO1基因敲除可抑制THP-1细胞增殖,下调THP-1巨噬细胞CD11b、CD68表达,上调CD14表达,增强THP-1巨噬细胞吞噬功能。结论 成功构建IDO1基因敲除的THP-1细胞株;IDO1对THP-1细胞增殖活性、分化调节以及THP-1巨噬细胞吞噬功能调节有重要作用,为后续进一步探讨IDO1基因在巨噬细胞中的功能及机制研究奠定基础。 展开更多
关键词 CRISPR/Cas9 吲哚胺-2 3-双加氧酶1 基因敲除 thp-1细胞 巨噬细胞
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茶黄素对ox-LDL诱导的THP-1巨噬细胞泡沫化和氧化应激的影响
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作者 石萌萌 黄锐 +4 位作者 黄子乐 胡军威 肖靖杰 刘艳红 武军驻 《中国动脉硬化杂志》 CAS 2024年第9期747-755,共9页
[目的]探索茶黄素对氧化型低密度脂蛋白(ox-LDL)诱导的THP-1巨噬细胞泡沫化和氧化应激的影响及机制。[方法]使用50μmol/L茶黄素、10μmol/L核因子E2相关因子2(NRF2)抑制剂ML385预处理THP-1来源的巨噬细胞,随后加入100 mg/L ox-LDL刺激... [目的]探索茶黄素对氧化型低密度脂蛋白(ox-LDL)诱导的THP-1巨噬细胞泡沫化和氧化应激的影响及机制。[方法]使用50μmol/L茶黄素、10μmol/L核因子E2相关因子2(NRF2)抑制剂ML385预处理THP-1来源的巨噬细胞,随后加入100 mg/L ox-LDL刺激细胞24 h建立泡沫细胞模型。通过CCK-8法和LDH释放量检测茶黄素对THP-1巨噬细胞活力的影响。通过RT-qPCR和Western blot检测炎症因子白细胞介素6(IL-6)、白细胞介素1β(IL-1β)、肿瘤坏死因子α(TNF-α)的表达;ELISA法检测炎症因子的释放。采用油红O染色检测细胞内脂质积累,DiL标记氧化型低密度脂蛋白(DiL-ox-LDL)染色检测脂质摄取,DCFH-DA探针检测活性氧(ROS)水平。通过Western blot和RT-qPCR检测脂质摄取、胆固醇外排及氧化应激相关蛋白的表达。[结果]经100 mg/L的ox-LDL处理,THP-1巨噬细胞活力明显降低,脂质摄取、积累明显增加,脂质摄取相关蛋白表达增加,胆固醇外排相关蛋白表达明显减少,炎症与ROS水平明显增加,髓过氧化物酶(MPO)和NADPH氧化酶2(NOX2)表达增加(P<0.05);加入茶黄素后,细胞活力升高,细胞内脂质积累明显减少,脂质摄取相关蛋白的表达明显减少,胆固醇外排相关蛋白表达明显增多,炎症因子IL-6、IL-1β、TNF-α的表达与释放明显降低,ROS水平降低,MPO与NOX2表达减少(P<0.05)。茶黄素预处理改变了NRF2信号通路中NRF2、血红素加氧酶1(HO-1)、Kelch样ECH关联蛋白1(KEAP1)的表达,增加了NRF2核易位,减缓了细胞内氧化应激。ML385预处理细胞后,NRF2、HO-1、KEAP1和CD36蛋白表达水平明显降低。[结论]茶黄素可以显著抑制THP-1巨噬细胞泡沫化,抑制ox-LDL诱导的THP-1巨噬细胞炎症并通过NRF2/HO-1信号通路减缓了氧化应激。 展开更多
关键词 茶黄素 泡沫细胞 thp-1巨噬细胞 氧化应激
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RNA结合蛋白RBPMS调控急性髓系白血病细胞系THP-1增殖与迁移
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作者 赵羚延 何浏 +1 位作者 马艳妮 余佳 《基础医学与临床》 CAS 2024年第5期619-625,共7页
目的研究具有多重剪接功能的RNA结合蛋白(RBPMS)对携带MLL-AF9融合基因的急性髓系白血病细胞系THP-1功能的影响。方法使用GEO数据库分析造血系统中RBPMS的表达情况;通过慢病毒感染THP-1细胞,RT-qPCR和Western blot检测RBPMS过表达效率;... 目的研究具有多重剪接功能的RNA结合蛋白(RBPMS)对携带MLL-AF9融合基因的急性髓系白血病细胞系THP-1功能的影响。方法使用GEO数据库分析造血系统中RBPMS的表达情况;通过慢病毒感染THP-1细胞,RT-qPCR和Western blot检测RBPMS过表达效率;通过高通量测序检测RBPMS过表达后对THP-1细胞转录组的影响。分别用CCK-8法和流式细胞仪检测RBPMS过表达对白血病细胞增殖以及迁移能力的影响。结果RBPMS在携带MLL-AF9融合基因的急性髓系白血病干细胞中异常低表达。RBPMS过表达后THP-1细胞的增殖和迁移能力显著降低(P<0.0001,P<0.05)。结论RBPMS可以抑制携带MLL-AF9融合基因的急性髓系白血病细胞系的细胞增殖与迁移。 展开更多
关键词 RBPMS MLL-AF9 急性髓系白血病 急性髓系白血病细胞系(thp-1)
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钙结合蛋白S100A4对BCG感染THP-1细胞自噬的调控作用
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作者 刘悦阳 李梦媛 +5 位作者 聂雪伊 马亚博 侯雨欣 马伯利 杨易 徐金瑞 《畜牧兽医学报》 CAS CSCD 北大核心 2024年第1期311-322,共12页
本研究旨在探究牛结核分枝杆菌减毒株卡介苗(Bacillus Calmette-Guérin,BCG)感染人单核巨噬细胞THP-1后,钙结合蛋白S100A4对细胞自噬的调控作用。以感染复数为10∶1的BCG感染THP-1细胞不同时间,用Western blot检测S100A4和LC3Ⅱ的... 本研究旨在探究牛结核分枝杆菌减毒株卡介苗(Bacillus Calmette-Guérin,BCG)感染人单核巨噬细胞THP-1后,钙结合蛋白S100A4对细胞自噬的调控作用。以感染复数为10∶1的BCG感染THP-1细胞不同时间,用Western blot检测S100A4和LC3Ⅱ的表达,以确定最佳感染时间,并采用透射电镜观察自噬体数量变化。在BCG单独感染或与S100A4小干扰RNA共处理THP-1细胞12 h后,采用qRT-PCR检测S100A4及自噬相关因子--微管相关蛋白轻链3II (microtubule-associated protein light chain 3Ⅱ, LC3Ⅱ)、自噬相关蛋白7(autophagy-related gene 7, Atg7)、Beclin-1在mRNA水平上的表达,采用Western blot检测S100A4、LC3Ⅱ、Atg7、Beclin-1在蛋白水平的表达。利用mRFP-GFP-LC3检测自噬流,激光共聚焦显微镜观察细胞中mRFP-LC3和mRFP-GFP-LC3点状聚集。结果显示:在BCG感染THP-1细胞不同时间后,S100A4和LC3Ⅱ在蛋白表达水平随感染时间的延长先上升后下降,在12 h时表达最高(P<0.001),且自噬体数量明显增多。在mRNA水平上,与siNC组相比,siNC+BCG感染组S100A4、LC3Ⅱ、Atg7、Beclin-1的mRNA表达水平显著上调(P<0.05),当BCG和siS100A4共处理后,S100A4、LC3Ⅱ、Atg7、Beclin-1在mRNA水平的表达显著(P<0.05)或极显著(P<0.01,P<0.001)下调;在蛋白水平上,与未感染组相比,S100A4、LC3Ⅱ、Atg7、Beclin-1的蛋白表达量显著增多(P<0.05),BCG和siS100A4共处理后,S100A4、LC3Ⅱ、Atg7、Beclin-1的蛋白表达量均极显著减少(P<0.001);与未感染组相比,BCG组自噬体的数量极显著增多(P<0.01),siS100A4+BCG组与siNC+BCG组相比,自噬体的数量显著减少(P<0.05)。S100A4对BCG感染巨噬细胞诱导的自噬具有调控作用,S100A4能够促进BCG诱导的THP-1细胞自噬。 展开更多
关键词 结核分枝杆菌 细胞自噬 S100A4 thp-1细胞
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过表达CASP1诱导人急性髓系白血病细胞THP-1的G_(0)/G_(1)细胞周期阻滞和NLRP3炎性小体介导的焦亡
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作者 艾克拜尔·阿布都热衣木 徐丽 +2 位作者 阿孜古丽·麦麦提 阿依姆妮萨·阿卜杜热合曼 帕提古力·苏力坦 《河北医学》 CAS 2024年第2期204-210,共7页
目的:探讨半胱天冬酶1(Caspase1,CASP1)对人急性髓系白血病(acute myeloid leukemia,AML)细胞THP-1的细胞周期和细胞焦亡的影响。方法:培养THP-1细胞,将细胞分为对照组(正常培养的THP-1细胞),pcDNA3.1-null组(过表达CASP1的阴性对照,用... 目的:探讨半胱天冬酶1(Caspase1,CASP1)对人急性髓系白血病(acute myeloid leukemia,AML)细胞THP-1的细胞周期和细胞焦亡的影响。方法:培养THP-1细胞,将细胞分为对照组(正常培养的THP-1细胞),pcDNA3.1-null组(过表达CASP1的阴性对照,用5.0μg/mL的pcDNA3.1-null质粒转染THP-1细胞24h)、pcDNA3.1-CASP1组(过表达CASP1,用5.0μg/mL的pcDNA3.1-CASP1质粒转染THP-1细胞24h)。用CCK-8法检测各组细胞的增殖活力。用流式细胞术检测各组细胞凋亡和周期的变化。用qRT-PCR法检测细胞中CASP1、白细胞介素(interleukin,IL)-1β,IL-18的mRNA表达水平。用Western blot法检测细胞增殖相关蛋白Ki67、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA),细胞周期蛋白D1(cyclin D1)、NOD样受体热蛋白结构域相关蛋白3(Nod-like receptor heat protein domain associated protein 3,NLRP3)、凋亡相关斑点样蛋白((apoptosis-associated speck-like protein,ASC)、CASP1、切割半胱天冬酶1(cleaved-caspase 1,cleaved-CASP1)、IL-1β,IL-18、cleaved-Gasdermin D的相对表达水平。结果:与对照组比,pcDNA3.1-null组的细胞增殖活力、细胞凋亡、细胞周期变化均无统计学意义(P>0.05)。与对照组比,pcDNA3.1-CASP1组的细胞凋亡变化无统计学意义(P>0.05),细胞的增殖活力减少,G_(0)/G_(1)细胞周期被阻滞,Ki67、PCNA、cyclin D1的相对表达水平均减少(P<0.05),NLRP3、ASC、CASP1、cleaved-CASP1、IL-1β,IL-18、cleaved-Gasdermin D的相对表达水平均增加(P<0.05)。与pcDNA3.1-null组比,pcDNA3.1-CASP1组的细胞凋亡变化无统计学意义(P>0.05),细胞的增殖活力减少,G_(0)/G_(1)细胞周期被阻滞,Ki67、PCNA、cyclin D1的相对表达水平均减少(P<0.05),NLRP3、ASC、CASP1、cleaved-CASP1、IL-1β,IL-18、cleaved-Gasdermin D(30 kDA)的相对表达水平均增加(P<0.05)。结论:过表达CASP1诱导AML细胞THP-1的G_(0)/G_(1)细胞周期阻滞和NLRP3炎性小体介导的焦亡。 展开更多
关键词 人急性髓系白血病细胞 半胱天冬酶1 细胞周期 细胞焦亡
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TM9SF1 promotes bladder cancer cell growth and infiltration 被引量:1
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作者 Long Wei Shi-Shuo Wang +9 位作者 Zhi-Guang Huang Rong-Quan He Jia-Yuan Luo Bin Li Ji-Wen Cheng Kun-Jun Wu Yu-Hong Zhou Shi Liu Sheng-Hua Li Gang Chen 《World Journal of Clinical Oncology》 2024年第2期302-316,共15页
BACKGROUND Bladder cancer(BC)is the most common urological tumor.It has a high recur-rence rate,displays tutor heterogeneity,and resists chemotherapy.Furthermore,the long-term survival rate of BC patients has remained... BACKGROUND Bladder cancer(BC)is the most common urological tumor.It has a high recur-rence rate,displays tutor heterogeneity,and resists chemotherapy.Furthermore,the long-term survival rate of BC patients has remained unchanged for decades,which seriously affects the quality of patient survival.To improve the survival rate and prognosis of BC patients,it is necessary to explore the molecular mechanisms of BC development and progression and identify targets for treatment and intervention.Transmembrane 9 superfamily member 1(TM9SF1),also known as MP70 and HMP70,is a member of a family of nine transmembrane superfamily proteins,which was first identified in 1997.TM9SF1 can be expressed in BC,but its biological function and mechanism in BC are not clear.AIM To investigate the biological function and mechanism of TM9SF1 in BC.Overexpression of TM9SF1 increased the in vitro proliferation,migration,and invasion of BC cells by promoting the entry of BC cells into the G2/M phase.Silencing of TM9SF1 inhibited in vitro proliferation,migration,and invasion of BC cells and blocked BC cells in the G1 phase.CONCLUSION TM9SF1 may be an oncogene in BC. 展开更多
关键词 TM9SF1 Bladder cancer Biological function cell function assay ONCOGENE
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登革2型病毒在RAW264.7细胞和THP-1细胞中复制能力及免疫激活能力的比较
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作者 牟小会 吴家红 +1 位作者 张海龙 匡贵榕 《医学理论与实践》 2024年第17期2897-2901,共5页
目的:比较登革2型病毒(DENV2)在RAW264.7细胞和THP-1细胞中的复制能力及DENV2对这两种靶细胞的免疫激活作用。方法:将DENV2病毒液与靶细胞(RAW264.7细胞和THP-1细胞)分别孵育6h、12h、24h,孵育结束后收集细胞,Trizol法提取不同时间的细... 目的:比较登革2型病毒(DENV2)在RAW264.7细胞和THP-1细胞中的复制能力及DENV2对这两种靶细胞的免疫激活作用。方法:将DENV2病毒液与靶细胞(RAW264.7细胞和THP-1细胞)分别孵育6h、12h、24h,孵育结束后收集细胞,Trizol法提取不同时间的细胞总RNA,检测RNA纯度和浓度后逆转录为cDNA,使用qRT-PCR检测样本中病毒目的基因DENV2 E及细胞因子IL-1β、IL-6、TNF-α、IFN-β、ISG15、CCL2的mRNA相对表达量。结果:DENV2感染RAW264.7细胞和THP-1细胞后,DENV2 E基因的表达量均显著上调(P<0.05),且呈现逐渐增加的趋势。6h、12h时,DENV2 E基因在两个靶细胞中的相对表达量一致;24h时,DENV2 E基因在RAW264.7细胞中的相对表达量显著高于THP-1细胞。与未感染DENV2组相比,DENV2感染RAW264.7细胞和THP-1细胞6h、12h、24h后,IL-1β、IL-6、TNF-α、ISG15、IFN-β、CCL2基因的相对表达量均显著升高(P<0.05),且在RAW264.7细胞中的相对表达量显著高于THP-1细胞。结论:DENV2在RAW264.7细胞中的复制能力强于THP-1细胞的复制能力,且DENV2在RAW264.7细胞中具有更强的免疫激活能力。 展开更多
关键词 DENV2 RAW264.7细胞 thp-1细胞 复制能力 免疫激活
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PbGIF1 promoting cell-proliferation in pear fruit is transcriptionally activated by Pb RR1
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作者 Huibin Wang Guangya Sha +5 位作者 Rui Gao Jianwen Pang Rui Zhai Chengquan Yang Zhigang Wang Lingfei Xu 《Horticultural Plant Journal》 SCIE CAS CSCD 2024年第3期689-697,共9页
As a cell proliferation regulator involved in wide biological processes in plants,GRF-INTERACTING FACTOR(GIF)controls different tissues development.However,whether GIF participates in fruit development remains unclear... As a cell proliferation regulator involved in wide biological processes in plants,GRF-INTERACTING FACTOR(GIF)controls different tissues development.However,whether GIF participates in fruit development remains unclear.According to transcriptome data,we identified PbGIF1was highly expressed during fruit development in cytokinins induced parthenocarpy pear.In the present study,the biofunction of PbGIF1 was initially verified.Overexpression of PbGIF1 promoted fruit size of transgenic tomato.The size of flesh fruit was not affected by cell expansion but the cell proliferation was promoted by overexpressing Pb GIF1.The accelerated cell proliferation process was also observed in PbGIF1-overexpressed transgenic pear fruit calli.The transcriptional regulation of cytokinins on PbGIF1 was further confirmed by exogenous CPPU treatments in pear fruitlets.To investigate the underlying mechanism,the cytokinins-responded factor,PbRR1,was further focused on.The results of Yeast-one-hybrid assay suggested that PbRR1 can bind to the promoter sequence of PbGIF1.The transcriptional activation of PbRR1 on PbGIF1 was also confirmed by Dual-Luciferase assays.Taken together,the results showed that cytokinins control pear fruit development via the transcriptional activation of PbGIF1 by PbRR1. 展开更多
关键词 PbGIF1 cell proliferation PEAR Fruit development CYTOKININS PbRR1
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Neural stem cell-derived exosomes regulate cell proliferation,migration,and cell death of brain microvascular endothelial cells via the miR-9/Hes1 axis under hypoxia
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作者 Xiaojun Deng Xiaoyi Hu +8 位作者 Shang Wang Hui Zhao Yaqin Wei Jiaqi Fu Wenhui Wu Jinming Liu Caicai Zhang Lili Wang Ping Yuan 《Animal Models and Experimental Medicine》 CAS CSCD 2024年第1期24-35,共12页
Background:Our previous study found that mouse embryonic neural stem cell(NSC)-derived exosomes(EXOs)regulated NSC differentiation via the miR-9/Hes1 axis.However,the effects of EXOs on brain microvascular endothelial... Background:Our previous study found that mouse embryonic neural stem cell(NSC)-derived exosomes(EXOs)regulated NSC differentiation via the miR-9/Hes1 axis.However,the effects of EXOs on brain microvascular endothelial cell(BMEC)dysfunction via the miR-9/Hes1 axis remain unknown.Therefore,the current study aimed to determine the effects of EXOs on BMEC proliferation,migration,and death via the miR-9/Hes1 axis.Methods:Immunofluorescence,quantitative real-time polymerase chain reaction,cell counting kit-8 assay,wound healing assay,calcein-acetoxymethyl/propidium iodide staining,and hematoxylin and eosin staining were used to determine the role and mechanism of EXOs on BMECs.Results:EXOs promoted BMEC proliferation and migration and reduced cell death under hypoxic conditions.The overexpression of miR-9 promoted BMEC prolifera-tion and migration and reduced cell death under hypoxic conditions.Moreover,miR-9 downregulation inhibited BMEC proliferation and migration and also promoted cell death.Hes1 silencing ameliorated the effect of amtagomiR-9 on BMEC proliferation and migration and cell death.Hyperemic structures were observed in the regions of the hippocampus and cortex in hypoxia-induced mice.Meanwhile,EXO treatment improved cerebrovascular alterations.Conclusion:NSC-derived EXOs can promote BMEC proliferation and migra-tion and reduce cell death via the miR-9/Hes1 axis under hypoxic conditions.Therefore,EXO therapeutic strategies could be considered for hypoxia-induced vascular injury. 展开更多
关键词 brain microvascular endothelial cells EXOSOMES HES1 MIR-9 neural stem cells
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Small extracellular vesicles from hypoxia-preconditioned bone marrow mesenchymal stem cells attenuate spinal cord injury via miR-146a-5p-mediated regulation of macrophage polarization
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作者 Zeyan Liang Zhelun Yang +5 位作者 Haishu Xie Jian Rao Xiongjie Xu Yike Lin Chunhua Wang Chunmei Chen 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第10期2259-2269,共11页
Spinal cord injury is a disabling condition with limited treatment options.Multiple studies have provided evidence suggesting that small extracellular vesicles(SEVs)secreted by bone marrow mesenchymal stem cells(MSCs)... Spinal cord injury is a disabling condition with limited treatment options.Multiple studies have provided evidence suggesting that small extracellular vesicles(SEVs)secreted by bone marrow mesenchymal stem cells(MSCs)help mediate the beneficial effects conferred by MSC transplantation following spinal cord injury.Strikingly,hypoxia-preconditioned bone marrow mesenchymal stem cell-derived SEVs(HSEVs)exhibit increased therapeutic potency.We thus explored the role of HSEVs in macrophage immune regulation after spinal cord injury in rats and their significance in spinal cord repair.SEVs or HSEVs were isolated from bone marrow MSC supernatants by density gradient ultracentrifugation.HSEV administration to rats via tail vein injection after spinal cord injury reduced the lesion area and attenuated spinal cord inflammation.HSEVs regulate macrophage polarization towards the M2 phenotype in vivo and in vitro.Micro RNA sequencing and bioinformatics analyses of SEVs and HSEVs revealed that mi R-146a-5p is a potent mediator of macrophage polarization that targets interleukin-1 receptor-associated kinase 1.Reducing mi R-146a-5p expression in HSEVs partially attenuated macrophage polarization.Our data suggest that HSEVs attenuate spinal cord inflammation and injury in rats by transporting mi R-146a-5p,which alters macrophage polarization.This study provides new insights into the application of HSEVs as a therapeutic tool for spinal cord injury. 展开更多
关键词 bone marrow mesenchymal stem cells hypoxia preconditioning interleukin-1 receptor-associated kinase 1 MACROPHAGES mesenchymal stem cells small extracellular vesicles spinal cord injury
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TuBG1 promotes hepatocellular carcinoma via ATR/P53-apoptosis and cycling pathways
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作者 Yan Zhang Zhen-Zhen Wang +4 位作者 An-Qi Han Ming-Ya Yang Li-Xin Zhu Fa-Ming Pan Yong Wang 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2024年第2期195-209,共15页
Background:As reported,γ-tubulin(TuBG1)is related to the occurrence and development of various types of malignant tumors.However,its role in hepatocellular cancer(HCC)is not clear.The present study was to investigate... Background:As reported,γ-tubulin(TuBG1)is related to the occurrence and development of various types of malignant tumors.However,its role in hepatocellular cancer(HCC)is not clear.The present study was to investigate the relationship between TuBG1 and clinical parameters and survival in HCC patients.Methods:The correlation between TuBG1 and clinical parameters and survival in HCC patients was ex-plored by bioinformatics analysis.Immunohistochemistry was used for the verification.The molecular function of TuBG1 was measured using colony formation,scratch assay,trans-well assay and flow cytometry.Gene set enrichment analysis(GSEA)was used to pick up the enriched pathways,followed by investigating the target pathways using Western blotting.The tumor-immune system interactions and drug bank database(TISIDB)was used to evaluate TuBG1 and immunity.Based on the TuBG1-related immune genes,a prognostic model was constructed and was further validated internally and externally.Results:The bioinformatic analysis found high expressed TuBG1 in HCC tissue,which was confirmed us-ing immunohistochemistry and Western blotting.After silencing the TuBG1 in HCC cell lines,more G1 arrested cells were found,cell proliferation and invasion were inhibited,and apoptosis was promoted.Furthermore,the silence of TuBG1 increased the expressions of Ataxia-Telangiectasia and Rad-3(ATR),phospho-P38 mitogen-activated protein kinase(P-P38MAPK),phospho-P53(P-P53),B-cell lymphoma-2 associated X protein(Bax),cleaved caspase 3 and P21;decreased the expressions of B-cell lymphoma-2(Bcl-2),cyclin D1,cyclin E2,cyclin-dependent kinase 2(CDK2)and CDK4.The correlation analysis of immunohistochemistry and clinical parameters and survival data revealed that TuBG1 was negatively corre-lated with the overall survival.The constructed immune prognosis model could effectively evaluate the prognosis.Conclusions:The increased expression of TuBG1 in HCC is associated with poor prognosis,which might be involved in the occurrence and development of HCC. 展开更多
关键词 TuBG1 Hepatocellular carcinoma APOPTOSIS cell cycling IMMUNOMODULATORS
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Prohibitin 1 inhibits cell proliferation and induces apoptosis via the p53-mediated mitochondrial pathway in vitro
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作者 Juan-Juan Shi Yi-Kai Wang +9 位作者 Mu-Qi Wang Jiang Deng Ning Gao Mei Li Ya-Ping Li Xin Zhang Xiao-Li Jia Xiong-Tao Liu Shuang-Suo Dang Wen-Jun Wang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第2期398-413,共16页
BACKGROUND Prohibitin 1(PHB1)has been identified as an antiproliferative protein that is highly conserved and ubiquitously expressed,and it participates in a variety of essential cellular functions,including apoptosis... BACKGROUND Prohibitin 1(PHB1)has been identified as an antiproliferative protein that is highly conserved and ubiquitously expressed,and it participates in a variety of essential cellular functions,including apoptosis,cell cycle regulation,prolifera-tion,and survival.Emerging evidence indicates that PHB1 may play an important role in the progression of hepatocellular carcinoma(HCC).However,the role of PHB1 in HCC is controversial.AIM To investigate the effects of PHB1 on the proliferation and apoptosis of human HCC cells and the relevant mechanisms in vitro.METHODS HCC patients and healthy individuals were enrolled in this study according to the inclusion and exclusion criteria;then,PHB1 levels in the sera and liver tissues of these participates were determined using ELISA,RT-PCR,and immunohistoche-mistry.Human HepG2 and SMMC-7721 cells were transfected with the pEGFP-PHB1 plasmid and PHB1-specific shRNA(shRNA-PHB1)for 24-72 h.Cell prolif-eration was analysed with an MTT assay.Cell cycle progression and apoptosis were analysed using flow cytometry(FACS).The mRNA and protein expression levels of the cell cycle-related molecules p21,Cyclin A2,Cyclin E1,and CDK2 and the cell apoptosis-related molecules cytochrome C(Cyt C),p53,Bcl-2,Bax,caspase 3,and caspase 9 were measured by real-time PCR and Western blot,respectively.RESULTS Decreased levels of PHB1 were found in the sera and liver tissues of HCC patients compared to those of healthy individuals,and decreased PHB1 was positively correlated with low differentiation,TNM stage III-IV,and alpha-fetoprotein≥400μg/L.Overexpression of PHB1 significantly inhibited human HCC cell proliferation in a time-dependent manner.FACS revealed that the overexpression of PHB1 arrested HCC cells in the G0/G1 phase of the cell cycle and induced apoptosis.The proportion of cells in the G0/G1 phase was significantly increased and the proportion of cells in the S phase was decreased in HepG2 cells that were transfected with pEGFP-PHB1 compared with untreated control and empty vector-transfected cells.The percentage of apoptotic HepG2 cells that were transfected with pEGFP-PHB1 was 15.41%±1.06%,which was significantly greater than that of apoptotic control cells(3.65%±0.85%,P<0.01)and empty vector-transfected cells(4.21%±0.52%,P<0.01).Similar results were obtained with SMMC-7721 cells.Furthermore,the mRNA and protein expression levels of p53,p21,Bax,caspase 3,and caspase 9 were increased while the mRNA and protein expression levels of Cyclin A2,Cy-clin E1,CDK2,and Bcl-2 were decreased when PHB1 was overexpressed in human HCC cells.However,when PHB1 was upregulated in human HCC cells,Cyt C expression levels were increased in the cytosol and decreased in the mitochondria,which indicated that Cyt C had been released into the cytosol.Conversely,these effects were reversed when PHB1 was knocked down.CONCLUSION PHB1 inhibits human HCC cell viability by arresting the cell cycle and inducing cell apoptosis via activation of the p53-mediated mitochondrial pathway. 展开更多
关键词 Prohibitin 1 Hepatocellular carcinoma cells APOPTOSIS cell cycle Mitochondrial pathway
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Prox1 Suppresses Proliferation and Drug Resistance of Retinoblastoma Cells via Targeting Notch1
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作者 Hong-li ZHANG Na LI +2 位作者 Lin DONG Hong-xia MA Mo-chi YANG 《Current Medical Science》 SCIE CAS 2024年第1期223-231,共9页
Objective Retinoblastoma(RB)is a prevalent type of eye cancer in youngsters.Prospero homeobox 1(Prox1)is a homeobox transcriptional repressor and downstream target of the proneural gene that is relevant in lymphatic,h... Objective Retinoblastoma(RB)is a prevalent type of eye cancer in youngsters.Prospero homeobox 1(Prox1)is a homeobox transcriptional repressor and downstream target of the proneural gene that is relevant in lymphatic,hepatocyte,pancreatic,heart,lens,retinal,and cancer cells.The goal of this study was to investigate the role of Prox1 in RB cell proliferation and drug resistance,as well as to explore the underlying Notch1 mechanism.Methods Human RB cell lines(SO-RB50 and Y79)and a primary human retinal microvascular endothelial cell line(ACBRI-181)were used in this study.The expression of Prox1 and Notch1 mRNA and protein in RB cells was detected using quantitative real time-polymerase chain reaction(RT-qPCR)and Western blotting.Cell proliferation was assessed after Prox1 overexpression using the Cell Counting Kit-8 and the MTS assay.Drug-resistant cell lines(SO-RB50/vincristine)were generated and treated with Prox1 to investigate the role of Prox1 in drug resistance.We employed pcDNA-Notch1 to overexpress Notch1 to confirm the role of Notch1 in the protective function of Prox1.Finally,a xenograft model was constructed to assess the effect of Prox1 on RB in vivo.Results Prox1 was significantly downregulated in RB cells.Overexpression of Prox1 effectively decreased RB cell growth while increasing the sensitivity of drug-resistant cells to vincristine.Notch1 was involved in Prox1’s regulatory effects.Notch1 was identified as a target gene of Prox1,which was found to be upregulated in RB cells and repressed by increased Prox1 expression.When pcDNA-Notch1 was transfected,the effect of Prox1 overexpression on RB was removed.Furthermore,by downregulating Notch1,Prox1 overexpression slowed tumor development and increased vincristine sensitivity in vivo.Conclusion These data show that Prox1 decreased RB cell proliferation and drug resistance by targeting Notch1,implying that Prox1 could be a potential therapeutic target for RB. 展开更多
关键词 Proxl NOTCH1 retinoblastoma cells PROLIFERATION drug resistance
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TAX1BP1 and FIP200 orchestrate non-canonical autophagy of p62 aggregates for mouse neural stem cell maintenance
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作者 Yi-Fu Zhu Rong-Hua Yu +15 位作者 Shuai Zhou Pei-Pei Tang Rui Zhang Yu-Xin Wu Ran Xu Jia-Ming Wei Ying-Ying Wang Jia-Li Zhang Meng-Ke Li Xiao-Jing Shi Yu-Wei Zhang Guang-Zhi Liu Rick FThorne Xu Dong Zhang Mian Wu Song Chen 《Zoological Research》 SCIE CSCD 2024年第4期937-950,共14页
Autophagy plays a pivotal role in diverse biological processes,including the maintenance and differentiation of neural stem cells(NSCs).Interestingly,while complete deletion of Fip200 severely impairs NSC maintenance ... Autophagy plays a pivotal role in diverse biological processes,including the maintenance and differentiation of neural stem cells(NSCs).Interestingly,while complete deletion of Fip200 severely impairs NSC maintenance and differentiation,inhibiting canonical autophagy via deletion of core genes,such as Atg5,Atg16l1,and Atg7,or blockade of canonical interactions between FIP200 and ATG13(designated as FIP200-4A mutant or FIP200 KI)does not produce comparable detrimental effects.This highlights the likely critical involvement of the non-canonical functions of FIP200,the mechanisms of which have remained elusive.Here,utilizing genetic mouse models,we demonstrated that FIP200 mediates non-canonical autophagic degradation of p62/sequestome1,primarily via TAX1BP1 in NSCs.Conditional deletion of Tax1bp1 in fip200hGFAP conditional knock-in(cKI)mice led to NSC deficiency,resembling the fip200hGFAP conditional knockout(cKO)mouse phenotype.Notably,reintroducing wild-type TAX1BP1 not only restored the maintenance of NSCs derived from tax1bp1-knockout fip200hGFAP cKI mice but also led to a marked reduction in p62 aggregate accumulation.Conversely,a TAX1BP1 mutant incapable of binding to FIP200 or NBR1/p62 failed to achieve this restoration.Furthermore,conditional deletion of Tax1bp1 in fip200hGFAP cKO mice exacerbated NSC deficiency and p62 aggregate accumulation compared to fip200hGFAP cKO mice.Collectively,these findings illustrate the essential role of the FIP200-TAX1BP1 axis in mediating the non-canonical autophagic degradation of p62 aggregates towards NSC maintenance and function,presenting novel therapeutic targets for neurodegenerative diseases. 展开更多
关键词 Non-canonical autophagy TAX1BP1 FIP200 P62 AGGREGATES Neural stem cell
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ZmCER1,a putative ECERIFERUM 1 protein in maize,functions in cuticular wax biosynthesis and bulliform cell development
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作者 Yan Zhao Qingzhi Liu +4 位作者 Xueran Wang Weixiao Zhang Wei Xu Yongzhong Zhang Baoshen Liu 《The Crop Journal》 SCIE CSCD 2024年第3期743-752,共10页
The cuticular wax,acting as the ultimate defense barrier,is essential for the normal morphogenesis of plant organs.Despite this importance,the connection between wax composition and leaf development has not been thoro... The cuticular wax,acting as the ultimate defense barrier,is essential for the normal morphogenesis of plant organs.Despite this importance,the connection between wax composition and leaf development has not been thoroughly explored.In this study,we characterized a new maize mutant,ragged leaf4(rgd4),which exhibits crinkled and ragged leaves starting from the sixth leaf stage.The phenotype of rgd4 is conferred by ZmCER1,which encoding an aldehyde decarbonylase involved in wax biosynthesis.ZmCER1 function deficient mutant displayed reduced cuticular wax density and disordered bulliform cells(BCs),while ZmCER1 overexpressing plants exhibited the opposite effects,indicating that ZmCER1 regulates cuticular wax biosynthesis and BCs development.Additionally,as the density of cuticular wax increased,the water loss rate of detached leaf decreases,suggesting that ZmCER1 is positively correlated with plant drought tolerance. 展开更多
关键词 Ragged leaf ZmCER1 Cuticular wax Bulliform cells
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