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Detection of eukaryotic translation initiation factor 4E and its clinical significance in hepatocellular carcinoma 被引量:2
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作者 Xiao-Lin Wang Hong-Pei Cai +1 位作者 Jun-Hui Ge Xiao-Feng Su 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第20期2540-2544,共5页
AIM:To study the expression of eukaryotic translation initiation factor 4E(eIF4E),which is closely correlated with malignant tumors,and its relationship to prognosis in hepatocellular carcinoma. METHODS:Western blotti... AIM:To study the expression of eukaryotic translation initiation factor 4E(eIF4E),which is closely correlated with malignant tumors,and its relationship to prognosis in hepatocellular carcinoma. METHODS:Western blotting was performed to quantify the elF4E protein expression in the normal human liver cell line L02 and the hepatoma cell lines Hep3B, HepG2,and Huh7.Forty-six hepatocellular carcinoma samples with complete clinical data were obtained from Changzheng Hospital during the period of December 2008 to July 2009.The expression of eIF4E in the tumor samples and their adjacent tissues were detected by immunohistochemistry.The relationship between the test results and hepatocellular carcinoma(HCC) prognosis was statistically analysed by using a COX proportional hazard model. RESULTS:Western blotting analysis showed that there were distinct eIF4E protein bands in all three of the hepatoma cell lines.In particular,the HepG2 cell line had the highest level of eIF4E protein expression.The L02 cell group had a low eIF4E expression.Immunohistochemical assay showed that there were 32 cases in which the tumour tissue expression was higher than their adjacent tissues,accounting for 69.57%.There were also 14 cases in which the tumour tissue expression was lower or no significant difference was found, accounting for 30.43%.COX proportional hazards model analysis showed that HCC prognosis was related to the depth of invasion,the overexpression of eIF4E and p53, possibly as independent HCC prognostic predictors. CONCLUSION:In summary,eIF4E expression is associated with liver cancer,and patients with high eIF4E expression levels have a higher risk of recurrence. 展开更多
关键词 Hepatocellular carcinoma eukaryotic translation initiation factor 4e Western blotting IMMUNOHISTOCHeMISTRY PROGNOSIS
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Relationship between Eukaryotic Translation Initiation Factor 4E and Malignant Angiogenesis in Non-Hodgkin Lymphoma 被引量:1
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作者 赵艳霞 刘文励 +2 位作者 周晟 周剑锋 孙汉英 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2005年第6期636-638,654,共4页
The relationship between angiogenesis and eukaryotic translation initiation factor 4E (EIF4E) expression level in non Hodgkin lymphoma (NHL) was studied. Mean microvessel density (MVD) and EIF4E were detected in... The relationship between angiogenesis and eukaryotic translation initiation factor 4E (EIF4E) expression level in non Hodgkin lymphoma (NHL) was studied. Mean microvessel density (MVD) and EIF4E were detected in 52 lymph node samples paraffin sections of patients with newly diagnosed NHL by the way of immunohistochemistry. Antisense EIF4E cDNA was cloned into plasmid pcDNA3.1 (+) and transfected into Raji cells. A series of angiogenesis related factors,including vascular endothelial growth factor (VEGF), matrix metalloproteinases 9 (MMP-9) and tissue inhibitor of metalloproteinases-2 (TIMP-2) proteins were detected by Western blot. The results showed that: (1) The Expression of EIF4E and MVD was higher in aggressive lymphomas than in indolent lymphomas(P〈0.05)and the expression of EIF4E was positively correlated with MVD in lymph node of NHL(r=0. 695, P〈0.01). (2) Antisense EIF4E eukaryocytic expression vector (pcDNA3. 1-EIF4Eas) was constructed successfully. (3) EIF4E, VEGF and MMP-9 were expressed at high levels in Raji cells as compared to normal human peripheral blood monocular cells (NHPMC), and blockage of EIF4E expression brought down the expression of VEGF and MMP-9. However, TIMP-2 was undetectable in Rail cells, although a moderate level of TIMP-2 was detected in NHPMC. It was concluded that the increased EIF4E expression was associated with aggressive property of NHL. 展开更多
关键词 eukaryotic translation initiation factor 4e non-Hodgkin lymphoma matrix metalloproteinases 9 tissue inhibitor of metalloproteinases-2
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The expression and the clinical significance of eukaryotic translation initiation factors 4E and p53 in squamous cell carcinoma 被引量:1
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作者 Shenqiu Li Ojnjing Wei 《The Chinese-German Journal of Clinical Oncology》 CAS 2009年第5期286-288,共3页
Objective: To study the expression of eukaryotic initiation factor-4E (eIF-4E) and p53 in squamous cell carcinomas (SCC) and to explore their relationship and clinical significance. Methods: The expression of el... Objective: To study the expression of eukaryotic initiation factor-4E (eIF-4E) and p53 in squamous cell carcinomas (SCC) and to explore their relationship and clinical significance. Methods: The expression of elF-4E and p53 in 32 cases of SCC was detected by immunohistochemical SABC method. Results: The positive rate of elF-4E and p53 expression was 93.8% and 56.3% in SCC, and the levels of eIF-4E and p53 were significantly higher in SCC than those in the normal skin tissue (P 〈 0.05). Conclusion: Both elF-4E and p53 were useful markers in SCC, but the specialty and sensitivity of the eiF- 4E protein was high in SCC. 展开更多
关键词 squamous cell carcinoma (SCC) eukaryotic initiation factor-4e elF-4e P53
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Cloning and Characterization of Eukaryotic Translation Initiation Factor 4E (eIF4E) Gene Family in Ipomoea batatas L. (Lam) for Understanding Hexaploid Sweetpotato-Virus Interactions
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作者 Adrianne P. A. Brown Marceline Egnin +6 位作者 Foaziatu Bukari Osagie Idehen Inocent Ritte Desmond Mortley Gregory Bernard Deloris Alexander Conrad Bonsi 《American Journal of Molecular Biology》 CAS 2022年第4期203-244,共42页
Characterization of genes related to sweetpotato viral disease resistance is critical for understanding plant-pathogen interactions, especially with feathery mottle virus infection. For example, genes encoding eukaryo... Characterization of genes related to sweetpotato viral disease resistance is critical for understanding plant-pathogen interactions, especially with feathery mottle virus infection. For example, genes encoding eukaryotic translation initiation factor (eIF)4E, its isoforms, eIF(iso)4E, and the cap-binding protein (CBP) in plants, have been implicated in viral infections aside from their importance in protein synthesis. Full-length cDNA encoding these putative eIF targets from susceptible/resistant and unknown hexaploid sweetpotato (Ipomoea batatas L. Lam) were amplified based on primers designed from the diploid wild-type relative Ipomoea trifida consensus sequences, and designated IbeIF4E, IbeIF(iso)4E and IbCBP. Comparative analyses following direct-sequencing of PCR-amplified cDNAs versus the cloned cDNA sequences identified multiple homeoalleles: one to four IbeIF4E, two to three IbeIF(iso)4E, and two IbCBP within all cultivars tested. Open reading frames were in the length of 696 bp IbeIF4E, 606 bp IbeIF(iso)4E, and 675 bp IbCBP. The encoded single polypeptide lengths were 232, 202, and 225 amino acids for IbeIF4E, IbeIF(iso)4E, and IbCBP, with a calculated protein molecular mass of 26 kDa, 22.8 kDa, and 25.8 kDa, while their theoretical isoelectric points were 5.1, 5.57, and 6.6, respectively. Although the homeoalleles had similar sequence lengths, single nucleotide polymorphisms and multi-allelic variations were detected within the coding sequences. The multi-sequence alignment performed revealed a 66.9% - 96.7% sequence similarity between the predicted amino acid sequences obtained from the homeoalleles and closely related species. Furthermore, phylogenetic analysis revealed ancestral relationships between the eIF4E homeoalleles and other species. The outcome herein on the eIF4E superfamily and its correlation in sequence variations suggest opportunities to decipher the role of eIF4E in hexaploid sweetpotato feathery mottle virus infection. 展开更多
关键词 Ipomoea batatas eukaryotic translation initiation Factors eIF4e CBP eIF(iso)4e Sweetpotato Viral Diseases
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肝细胞肝癌组织中WDR4和EIF2A的表达及临床预后价值
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作者 陶珊珊 王竞 黄桂春 《徐州医科大学学报》 CAS 2024年第2期112-118,共7页
目的探讨肝细胞肝癌(HCC)组织中WD重复结构域4(WDR4)、真核翻译起始因子2A(EIF2A)的表达情况及临床预后意义。方法收集2019年1月—2020年1月南京大学医学院附属金陵医院收治的90例HCC患者的临床资料。利用R语言(4.2.1版本)分析癌症基因... 目的探讨肝细胞肝癌(HCC)组织中WD重复结构域4(WDR4)、真核翻译起始因子2A(EIF2A)的表达情况及临床预后意义。方法收集2019年1月—2020年1月南京大学医学院附属金陵医院收治的90例HCC患者的临床资料。利用R语言(4.2.1版本)分析癌症基因组图谱(TCGA)数据库下载的327对HCC癌组织和癌旁组织中WDR4 mRNA、EIF2A mRNA表达的转录组测序数据。免疫组织化学检测HCC癌组织、癌旁组织中WDR4、EIF2A表达。分析HCC癌组织WDR4、EIF2A表达与临床病理特征的关系。Kaplan-Meier法分析WDR4、EIF2A表达对HCC患者预后的影响。Cox回归模型分析HCC预后的影响因素。结果HCC癌组织WDR4 mR-NA、EIF2A mRNA表达高于癌旁组织,差异有统计学意义(P均<0.05)。HCC癌组织中WDR4、EIF2A表达阳性率高于癌旁组织,差异有统计学意义(P均<0.05)。HCC癌组织WDR4 mRNA与EIF2A mRNA表达呈正相关(r=0.404,P<0.001)。HCC癌组织中WDR4蛋白与EIF2A蛋白表达呈正相关(r=0.667,P<0.05)。肿瘤最大径>5 cm、TNM分期Ⅲ期及浸润型HCC癌组织中WDR4、EIF2A阳性率分别高于肿瘤最大径≤5 cm、TNM分期Ⅰ-Ⅱ期及非浸润型癌组织,差异有统计学意义(P均<0.05)。WDR4阳性组3年累积生存率明显低于WDR4阴性组,差异有统计学意义(P=0.016)。EIF2A阳性组3年累积生存率明显低于EIF2A阴性组,差异有统计学意义(P=0.022)。肿瘤TNM分期Ⅲ期、肿瘤最大径>5 cm、WDR4阳性、EIF2A阳性是HCC患者不良预后的独立危险因素。结论HCC组织中WDR4、EIF2A表达升高,两者与HCC不良临床病理特征有关,是评估HCC预后的肿瘤标志物。 展开更多
关键词 肝细胞肝癌 WD重复结构域4 真核翻译起始因子2A 临床病理特征 预后
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脾相关酪氨酸激酶、蛋白激酶B、真核翻译起始因子4E、细胞周期蛋白依赖性激酶4在胃癌及癌前病变中的表达及相关性 被引量:2
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作者 李雪滢 王觅柱 《癌症进展》 2023年第3期256-260,共5页
目的探讨脾相关酪氨酸激酶(SYK)、蛋白激酶B(AKT)、真核翻译起始因子4E(EIF4E)、细胞周期蛋白依赖性激酶4(CDK4)在胃癌及癌前病变中的表达及相关性。方法收集90例患者的胃黏膜组织进行蛋白质印迹实验,其中癌旁正常组织30例,萎缩性胃炎组... 目的探讨脾相关酪氨酸激酶(SYK)、蛋白激酶B(AKT)、真核翻译起始因子4E(EIF4E)、细胞周期蛋白依赖性激酶4(CDK4)在胃癌及癌前病变中的表达及相关性。方法收集90例患者的胃黏膜组织进行蛋白质印迹实验,其中癌旁正常组织30例,萎缩性胃炎组织30例,胃癌组织30例。另收集胃癌组织、萎缩性胃炎组织、癌旁正常组织存档蜡块各30例进行免疫组化实验。分别采用蛋白质印迹法和免疫组化法检测各组织中SYK、AKT、EIF4E、CDK4表达情况。分析萎缩性胃炎组织与胃癌组织中SYK、AKT、EIF4E、CDK4的相关性。结果癌旁正常组织中SYK蛋白表达水平及阳性表达率均高于萎缩性胃炎组织,萎缩性胃炎组织中SYK蛋白表达水平及阳性表达率均高于胃癌组织;癌旁正常组织中AKT、EIF4E、CDK4蛋白表达水平及阳性表达率均低于萎缩性胃炎组织,萎缩性胃炎组织中AKT、EIF4E、CDK4蛋白表达水平及阳性表达率均低于胃癌组织,差异均有统计学意义(P<0.05)。Spearman相关分析结果显示,胃癌组织和萎缩性胃炎组织中SYK与AKT、EIF4E、CDK4表达均呈负相关(P<0.05),AKT、EIF4E、CDK4三者表达均呈正相关(P<0.01)。结论SYK、AKT、EIF4E、CDK4可能通过相互作用共同参与了胃癌的发生,其可能的机制与磷脂酰肌醇-3-羟激酶(PI3K)/AKT信号通路有关。SYK、AKT、EIF4E、CDK4有希望成为胃癌诊断和防治的靶标,检测SYK、AKT、EIF4E、CDK4对胃癌诊断、早期治疗及预防具有重要价值。 展开更多
关键词 胃癌 萎缩性胃炎 脾相关酪氨酸激酶 蛋白激酶B 真核翻译起始因子4e 细胞周期蛋白依赖性激酶4
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High expression of autophagy-related gene EIF4EBP1 could promote tamoxifen resistance and predict poor prognosis in breast cancer
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作者 Shan Yang Tian-Li Hui +6 位作者 Hao-Qi Wang Xi Zhang Yun-Zhe Mi Meng Cheng Wei Gao Cui-Zhi Geng Sai-Nan Li 《World Journal of Clinical Cases》 SCIE 2023年第20期4788-4799,共12页
BACKGROUND Breast cancer(BC) remains a public health problem. Tamoxifen(TAM) resistance has caused great difficulties for treatment of BC patients. Eukaryotic translation initiation factor 4E binding protein 1(EIF4EBP... BACKGROUND Breast cancer(BC) remains a public health problem. Tamoxifen(TAM) resistance has caused great difficulties for treatment of BC patients. Eukaryotic translation initiation factor 4E binding protein 1(EIF4EBP1) plays critical roles in the tumorigenesis and progression of BC. However, the expression and mechanism of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients are still unclear.AIM To investigate the expression and functions of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients.METHODS High-throughput sequencing data of breast tumors were downloaded from the Gene Expression Omnibus database. Differential gene expression analysis identified EIF4EBP1 to be significantly upregulated in cancer tissues. Its prognostic value was analyzed. The biological function and related pathways of EIF4EBP1 was analyzed. Subsequently, the expression of EIF4EBP1 was determined by real-time reverse transcription polymerase chain reaction and western blotting. Cell Counting Kit-8 assays, colony formation assay and wound healing assay were used to understand the phenotypes of function of EIF4EBP1.RESULTS EIF4EBP1 was upregulated in the TAM-resistant cells, and EIF4EBP1 was related to the prognosis of BC patients. Gene Set Enrichment Analysis showed that EIF4EBP1 might be involved in Hedgehog signaling pathways. Decreasing the expression of EIF4EBP1 could reverse TAM resistance, whereas overexpression of EIF4EBP1 promoted TAM resistance.CONCLUSION This study indicated that EIF4EBP1 was overexpressed in the BC and TAM-resistant cell line, which increased cell proliferation, invasion, migration and TAM resistance in BC cells. 展开更多
关键词 Breast cancer eukaryotic translation initiation factor 4e binding protein 1 TAMOXIFeN Resistance Prognosis BIOINFORMATICS
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真核翻译起始因子4G1与恶性肿瘤的研究进展
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作者 彭秀娟 张丹凤 《中国医药科学》 2024年第9期31-35,共5页
真核翻译起始因子4G1(eIF4G1)是一种大型支架蛋白,在真核生物mRNA翻译起始过程中,可作为蛋白质的对接位点,介导帽依赖性与非帽依赖性翻译启动。eIF4G1是翻译调控中的重要靶标,被认为参与多种肿瘤细胞的生长、迁移、增殖、侵袭和凋亡。... 真核翻译起始因子4G1(eIF4G1)是一种大型支架蛋白,在真核生物mRNA翻译起始过程中,可作为蛋白质的对接位点,介导帽依赖性与非帽依赖性翻译启动。eIF4G1是翻译调控中的重要靶标,被认为参与多种肿瘤细胞的生长、迁移、增殖、侵袭和凋亡。近年来,随着对eIF4G1研究的深入,临床对其作用和功能也有了更深的理解,本文总结相关文献,对eIF4G1的功能、研究现状及与肿瘤的关系做一简要综述。 展开更多
关键词 真核翻译起始因子4G1 帽依赖性翻译 真核翻译起始因子 肿瘤 MRNA
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雷帕霉素对柯萨奇病毒B3诱导的大鼠心肌细胞mTOR和eIF-4E表达的调控作用 被引量:10
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作者 陈淳媛 孙跃女 +2 位作者 杨作成 蔡姿丽 杨敏 《中南大学学报(医学版)》 CAS CSCD 北大核心 2008年第7期612-617,共6页
目的:研究雷帕霉素对柯萨奇病毒B3(coxsackievirus B3,CVB3)诱导的心肌细胞哺乳类雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)和真核起始因子4E(eukaryotic initiation factor-4E,eIF-4E)表达的调控,探讨mTOR/eIF-4E信号传导... 目的:研究雷帕霉素对柯萨奇病毒B3(coxsackievirus B3,CVB3)诱导的心肌细胞哺乳类雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)和真核起始因子4E(eukaryotic initiation factor-4E,eIF-4E)表达的调控,探讨mTOR/eIF-4E信号传导在病毒性心肌炎(viral myocarditis,VM)的作用。方法:CVB3感染原代培养的SD大鼠心肌细胞建立病毒性心肌炎的细胞模型。根据细胞毒力实验筛选10 nmol/L的雷帕霉素干预CVB3感染的心肌细胞,采用RT-PCR和Western免疫印迹方法检测mTOR和eIF-4E mRNA表达及蛋白质水平。结果:CVB3诱导心肌细胞变性,雷帕霉素可减轻其变性;CVB3使大鼠心肌细胞的mTOR和eIF-4E mRNA和蛋白表达上调,与对照组比较,有统计学差异(P<0.05),雷帕霉素可使CVB3感染的心肌细胞mTOR和eIF-4E mRNA和蛋白表达明显下调,与CVB3组比较,有统计学差异(P<0.05)。结论:雷帕霉素能明显抑制CVB3感染的大鼠心肌细胞mTOR和eIF-4E表达,提示mTOR/eIF-4E信号传导在病毒性心肌炎中可能起重要作用。 展开更多
关键词 哺乳类雷帕霉素靶蛋白 真核起始因子4e 柯萨奇病毒B3 心肌细胞
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The Prognostic Value of Pathological and Molecular Margins Marked by p53 and eIF4E in Laryngeal Carcinoma
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作者 夏良平 曾剑 +3 位作者 郭朱明 饶慧兰 曾敬 曾宗渊 《The Chinese-German Journal of Clinical Oncology》 CAS 2005年第1期56-60,69,共6页
Objective: To study the prognostic value of the pathological margin and molecular margin marked by eIF4E and P53 protein in laryngeal carcinoma. Methods: The prognostic value of pathological and molecular margin was s... Objective: To study the prognostic value of the pathological margin and molecular margin marked by eIF4E and P53 protein in laryngeal carcinoma. Methods: The prognostic value of pathological and molecular margin was studied in 253 cases and 67 cases respectively, the latter were pathological negative margin chosen from the former. Immunohistochemisty was used to detect the expression of eIF4E and p53 proteins. Results: The rate of pathological, p53 and eIF4E positive margins was 20.2%, 19.4% and 32.8% respectively. The recurrent rate of those with positive margins was higher than that of negative margins, which including pathological margin (70.6% vs 35.1%, P =0.0000), p53 margin (69.2% vs 33.3%, P =0.018) and eIF4E margin (63.6% vs 28.9%, P =0.018); The survival rate of those with negative margins was higher than those with positive margins, including pathological margin (the 5-year cumulative survival rate was 37.52% and 64.37% respectively, P =0.0023), p53 margin (the 5-year cumulative survival rate was 24.62% and 75.69% respectively, P =0.0012) and eIF4E margin (the 5-year cumulative survival rate was 43.31% and 77.52% respectively, P =0.0006). Conclusion: The prognosis of those with both pathological and molecular positive margins was worse than that of the negative margins; Both the eIF4E and p53 were useful markers to pick out the poor prognostic patients from those with pathological negative margin, and the former seemed to be more potential. 展开更多
关键词 laryngeal neoplasm/squamous cell carcinoma PROGNOSIS molecular margin eukaryotic translation initiation factor 4e P53
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前列地尔对暴发性肝衰竭大鼠eIF2α/ATF4/CHOP通路及肝功能的影响 被引量:2
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作者 李盼盼 符健 +1 位作者 陈伟 陈丽 《中国比较医学杂志》 CAS 北大核心 2021年第8期55-62,共8页
目的探究前列地尔(PGE1)对暴发性肝衰竭(FHF)大鼠对肝功能的影响,并探讨其对真核翻译起始因子2α(eIF2α)/激活转录因子4(ATF4)/C/EBP同源蛋白(CHOP)通路的调控作用。方法SPF级SD雄性大鼠90只按随机数表法分为对照组、模型组、阳性对照... 目的探究前列地尔(PGE1)对暴发性肝衰竭(FHF)大鼠对肝功能的影响,并探讨其对真核翻译起始因子2α(eIF2α)/激活转录因子4(ATF4)/C/EBP同源蛋白(CHOP)通路的调控作用。方法SPF级SD雄性大鼠90只按随机数表法分为对照组、模型组、阳性对照组、低、中、高剂量PGE1组,除对照组外,其它组大鼠均采用腹腔注射D-氨基半乳糖(D-GalN)-大肠杆菌内毒素脂多糖(LPS)的方法建立FHF大鼠模型,对照组腹腔注射等量的生理盐水。造模6 h后,阳性对照组及低、中、高剂量PGE1组分别尾静脉注射促肝细胞生长素1.36 mg/kg,PGE112.5、25、37.5μg/kg,每天1次,连续给药3 d,对照组和模型组尾静脉注射等量的生理盐水。在造模72 h后处死大鼠,腹主动脉采血,检测血清丙氨酸氨基转氨酶(ALT)、天门冬氨酸氨基转移酶(AST)、总胆红素(TBIL)水平;解剖取肝组织用苏木精-伊红(HE)染色法观察各组大鼠肝组织病理学变化;采用实时荧光定量PCR(qRT-PCR)和蛋白免疫印迹(Western blot)法检测肝组织中eIF2α/ATF4/CHOP/半胱氨酸天冬氨酸蛋白酶-3(Caspase-3)mRNA和蛋白、磷酸化-eIF2α(p-eIF2α)蛋白水平。结果与对照组相比,模型组肝细胞广泛变性并有局灶性坏死,中央静脉受损,血清ALT、AST、TBIL,肝组织中eIF2α、ATF4、CHOP、Caspase-3 mRNA及p-eIF2α/eIF2α、ATF4、CHOP、Caspase-3蛋白水平均升高(P<0.05);与模型组相比,阳性对照组、低、中、高剂量PGE1组肝细胞损害有所降低,坏死细胞数量减少,血清ALT、AST、TBIL水平,肝组织中eIF2α、ATF4、CHOP、Caspase-3 mRNA及p-eIF2α/eIF2α、ATF4、CHOP、Caspase-3蛋白水平降低(P<0.05);且随着PGE1给药剂量的增加,低、中、高剂量PGE1组血清ALT、AST、TBIL水平,肝组织中eIF2α、ATF4、CHOP、Caspase-3 mRNA及p-eIF2α/eIF2α、ATF4、CHOP、Caspase-3蛋白水平依次降低(P<0.05),呈剂量依赖性;与阳性对照组相比,低、中剂量PGE1组血清ALT、AST、TBIL水平,肝组织中eIF2α、ATF4、CHOP、Caspase-3 mRNA及p-eIF2α/eIF2α、ATF4、CHOP、Caspase-3蛋白水平均升高(P<0.05),高剂量PGE1组血清ALT、AST、TBIL水平,肝组织中eIF2α、ATF4、CHOP、Caspase-3 mRNA及p-eIF2α/eIF2α、ATF4、CHOP、Caspase-3蛋白水平差异无统计学意义(P>0.05)。结论PGE1可能通过抑制eIF2α/ATF4/CHOP通路表达,减轻大鼠肝细胞凋亡,达到保护肝的作用,可能作为FHF潜在的治疗药物。 展开更多
关键词 前列地尔 暴发性肝功能衰竭 大鼠 真核翻译起始因子2α 激活转录因子4 C/eBP同源蛋白
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Structure and functions of the translation initiation factor eIF4E and its role in cancer development and treatment 被引量:5
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作者 Arianna Pisera Adele Campo Salvatore Campo 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2018年第1期13-24,共12页
In eukaryotic cells, protein synthesis is a complex and multi-step process that has several mechanisms to start the translation including cap-dependent and cap-independent initiation. The translation control of eukary... In eukaryotic cells, protein synthesis is a complex and multi-step process that has several mechanisms to start the translation including cap-dependent and cap-independent initiation. The translation control of eukaryotic gene expression occurs principally at the initiation step. In this context, it is critical that the eukaryotic translation initiation factor eIF4E bind to the 7-methylguanosine (m7G) cap present at the 5'- UTRs of most eukaryotic mRNAs. Combined with other initiation factors, elF4E mediates the mRNA recruitment on ribosomes to start the translation. Moreover, the eIF4E nuclear bodies are involved in the export of specific mRNAs from the nucleus to the cytoplasm. In this review, we focus on the elF4E structure and its physiological functions, and describe the role of eIF4E in cancer development and progression and the current therapeutic strategies to target eIF4E. 展开更多
关键词 elF4e factor translation initiation mRNA exportCancer
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Regulation of Eukaryotic Initiation Factor 4E and Its Isoform: Implications for Antiviral Strategy in Plants 被引量:3
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作者 Yu-Yang Zhang Han-Xia Li +1 位作者 Bo Ouyang Zhi-Biao Ye 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2006年第10期1129-1139,共11页
In recent years, biotechnology has permitted regulation of the expression of endogenous plant genes to improve agronomlcally important traits. Genetic modification of crops has benefited from emerging knowledge of new... In recent years, biotechnology has permitted regulation of the expression of endogenous plant genes to improve agronomlcally important traits. Genetic modification of crops has benefited from emerging knowledge of new genes, especially genes that exhibit novel functions, one of which is eukaryotlc initiation factor 4E (eIF4E). eIF4E Is one of the most important translation initiation factors Involved in eukaryotic initiation. Recent research has demonstrated that virus resistance mediated by eIF4E and Its isoform elf (Iso)4E occurs in several plant-virus interactions, thus indicating a potential new role for eIF4E/elF(Iso)4E In resistance strategies against plant viruses. In this review, we briefly describe eIF4E activity In plant translation, its potential role, and functions of the eIF4E subfamily In plant-virus interactions. Other initiation factors such as elF4G could also play a role In plant resistance against viruses. Finally, the potential for developing eIF4E-mediated resistance to plant viruses in the future Is discussed. Future research should focus on elucidation of the resistance mechanism and spectrum mediated by eIF4E. Knowledge of a particu- lar plant-virus interaction will help to deepen our understanding of eIF4E and other eukaryotic Initiation factors, and their involvement in virus disease control. 展开更多
关键词 eIF4e ANTIVIRUS eukaryotic initiation factors interaction plant
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ARID1A Inactivation Increases Expression of circ0008399 and Promotes Cisplatin Resistance in Bladder Cancer
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作者 Yang-kai JIANG Yu-jun SHUAI +7 位作者 Hua-min DING Hui ZHANG Chao HUANG Liang WANG Jia-yin SUN Wen-jie WEI Xing-yuan XIAO Guo-song JIANG 《Current Medical Science》 SCIE CAS 2023年第3期560-571,共12页
Objective Cisplatin(CDDP)-based chemotherapy is a first-line,drug regimen for muscle-invasive bladder cancer(BC)and metastatic bladder cancer.Clinically,resistance to CDDP restricts the clinical benefit of some bladde... Objective Cisplatin(CDDP)-based chemotherapy is a first-line,drug regimen for muscle-invasive bladder cancer(BC)and metastatic bladder cancer.Clinically,resistance to CDDP restricts the clinical benefit of some bladder cancer patients.AT-rich interaction domain 1A(ARID1A)gene mutation occurs frequently in bladder cancer;however,the role of CDDP sensitivity in BC has not been studied.Methods We established ARID1A knockout BC cell lines using CRISPR/Cas9 technology.IC50 determination,flow cytometry analysis of apoptosis,and tumor xenograft assays were performed to verify changes in the CDDP sensitivity of BC cells losing ARID1A.qRT-PCR,Western blotting,RNA interference,bioinformatic analysis,and ChIP-qPCR analysis were performed to further explore the potential mechanism of ARID1A inactivation in CDDP sensitivity in BC.Results It was found that ARID1A inactivation was associated with CDDP resistance in BC cells.Mechanically,loss of ARID1A promoted the expression of eukaryotic translation initiation factor 4A3(EIF4A3)through epigenetic regulation.Increased expression of EIF4A3 promoted the expression of hsa_circ_0008399(circ0008399),a novel circular RNA(circRNA)identified in our previous study,which,to some extent,showed that ARID1A deletion caused CDDP resistance through the inhibitory effect of circ0008399 on the apoptosis of BC cells.Importantly,EIF4A3-IN-2 specifically inhibited the activity of EIF4A3 to reduce circ0008399 production and restored the sensitivity of ARID1A inactivated BC cells to CDDP.Conclusion Our research deepens the understanding of the mechanisms of CDDP resistance in BC and elucidates a potential strategy to improve the efficacy of CDDP in BC patients with ARID1A deletion through combination therapy targeting EIF4A3. 展开更多
关键词 AT-rich interaction domain 1A hsa_circ_0008399 eukaryotic translation initiation factor 4A3 cisplatin resistance bladder cancer
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真核翻译起始因子4G1在非小细胞肺癌中的表达及意义 被引量:3
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作者 陆英 虞珊珊 +3 位作者 马钻 白宝鑫 王光学 徐增光 《同济大学学报(医学版)》 CAS 2018年第6期60-65,共6页
目的探讨真核翻译起始因子4G1(eukaryotic translation initiation factor 4 gamm 1,EIF4G1)在非小细胞肺癌(non-small cell lung cancer,NSCLC)中的表达及意义。方法收集接受手术治疗的NSCLC患者81例(男性49例,女性32例),应用实时定量... 目的探讨真核翻译起始因子4G1(eukaryotic translation initiation factor 4 gamm 1,EIF4G1)在非小细胞肺癌(non-small cell lung cancer,NSCLC)中的表达及意义。方法收集接受手术治疗的NSCLC患者81例(男性49例,女性32例),应用实时定量聚合酶链反应(PCR)和免疫组织化学方法检测癌组织及配对癌旁组织中EIF4G1mRNA和蛋白的表达,分析其在NSCLC癌组织中的表达特点及与患者临床病理特征的关系。结果 EIF4G1 mRNA在NSCLC癌组织中的表达(6. 92±1. 87)明显低于癌旁组织(8. 33±1. 69)(t=7. 01,P<0. 001)。将NSCLC分为3种不同病理类型:鳞癌、腺癌和其他类型,EIF4G1 mRNA在各组表达差异均具有统计学意义(P<0. 05)。EIF4G1mRNA在低分化癌组织中的表达水平(8. 90±1. 33)明显高于在中分化(1. 70±0. 17)和高分化(0. 84±0. 15)癌组织(F=14. 04,P<0. 001)。EIF4G1 mRNA在Ⅳ期癌组织中的表达(15. 42±3. 99)明显高于Ⅰ、Ⅱ、Ⅲ期癌组织(分别为1. 67±0. 37、2. 96±0. 77、5. 44±0. 99)(F=11. 84,P<0. 001)。不同年龄、性别和病理类型EIF4G1 mRNA表达水平均未见明显差异(均P>0. 05)。Logistic回归分析显示EIF4G1高表达与NSCLC癌细胞分化程度密切相关(OR=23. 74,P<0. 001)。免疫组化结果显示EIF4G1在低分化癌组织中的蛋白表达水平明显高于中分化和高分化癌组织(P<0. 05)。结论 EIF4G1在NSCLC中特异性高表达,且其表达强度与癌细胞的分化程度密切相关。 展开更多
关键词 非小细胞肺癌 真核翻译起始因子4G1 实时定量聚合酶链反应 免疫组化
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Therapeutic Effect and Mechanism of New Maixian Powder on DSS-induced UC Rats 被引量:1
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作者 Minjun FU Rongzhen SHI +2 位作者 Jianjun SHEN Meixia YANG Hongbin ZHENG 《Medicinal Plant》 CAS 2018年第3期58-61,共4页
[Objectives] To study the therapeutic effect and mechanism of New Maixian Powder on ulcerative colitis( UC) rats through observing its regulatory effect on the protein kinase R-like endoplasmic reticulum kinase( PERK)... [Objectives] To study the therapeutic effect and mechanism of New Maixian Powder on ulcerative colitis( UC) rats through observing its regulatory effect on the protein kinase R-like endoplasmic reticulum kinase( PERK)/eukaryotic translation initiation factor-2α( e IF-2α)/nuclear transcription factor-kappa B( NF-κB) signaling pathway. [Methods]First,60 SD rats were randomly divided into normal group,model group,mesalazine group,and New Maixian Powder low,medium and high dose groups,10 rats each group. Then,dextran sulfate sodium( DSS) was used to induce UC rats. The mesalazine group was given 0. 42 g/( kg·d) of mesalazine sustained-release granule suspension,New Maixian Powder low,medium and high dose groups were given 1. 5,3,and 6 g/( kg·d) of New Maixian Powder suspension,respectively,and other groups were given an equal volume of physiological saline,continuous intragastric administration for 14 d. Next,the disease activity index( DAI) of UC rats was evaluated; the expression of NF-κB in serum was measured by enzyme-linked immunosorbent assay( ELISA); the expression of PERK and e IF-2α protein and m RNA in colon tissue was detected by Western blot and real-time quantitative polymerase chain reaction( RT q-PCR). [Results] Compared with the normal group,the DAI score and serum NF-κB level in the model group were significantly higher( P < 0. 05),and PERK and e IF-2α protein and m RNA levels in the colon tissue were increased( P < 0. 05); compared with the model group,the DAI score decreased and serum NF-κB level declined in the New Maixian Powder group,and the expression of PERK and e IF-2α protein and m RNA in New Maixian Powder medium dose and high dose groups declined( P < 0. 05). [Conclusions]New Maixian Powder has good therapeutic effect on UC rats,and its mechanism may be connected with the inhibition of the activation of PERK/e IF-2α/NF-κB signaling pathway. 展开更多
关键词 New Maixian Powder Ulcerative colitis(UC) Protein kinase R-like endoplasmic reticulum kinase(PeRK) eukaryotic translation initiation factor-2α(eIF-2α) Nuclear transcription factor-kappa B(NF-κB)
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内质网应激调节肝星状细胞HGF表达的作用机制 被引量:1
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作者 刘雨亭 李书 +4 位作者 陈建亮 周澍 曹守纪 俞悦 李国强 《南京医科大学学报(自然科学版)》 CAS CSCD 北大核心 2016年第9期1046-1051,共6页
目的:探讨内质网应激对肝星状细胞分泌肝细胞生长因子(hypatocyte growth factor,HGF)的影响及其可能机制。方法 :通过在培养的大鼠肝星状细胞T6中分别加入5.0μg/m L衣霉素或0.2μmol/L毒胡萝卜素建立肝星状细胞内质网应激模型,4.0 mmo... 目的:探讨内质网应激对肝星状细胞分泌肝细胞生长因子(hypatocyte growth factor,HGF)的影响及其可能机制。方法 :通过在培养的大鼠肝星状细胞T6中分别加入5.0μg/m L衣霉素或0.2μmol/L毒胡萝卜素建立肝星状细胞内质网应激模型,4.0 mmol/L 4-苯基丁酸钠(4-phenylbutyrate,4-PBA)和200.0μmol/L salubrinal作为内质网应激抑制剂对T6细胞进行预处理,重组慢病毒LV-e If2α-sh RNA-GFP敲减T6细胞中的e If2αm RNA表达,并提取m RNA和全蛋白进行RT-PCR和Western blot实验检测HGF、分子伴侣重链结合蛋白(glucose-regulated protein 78,GRP78)、真核翻译起始因子2α(eukaryotic translation initiation factor 2α,e If2α)、磷酸化e If2α、激活转录因子4(activating transcription factor 4,ATF4)以及凋亡信号分子C/EBP同源蛋白(C/EBP homologous protein,CHOP)。结果:衣霉素、毒胡萝卜素可诱导T6细胞GRP78升高,激活内质网应激状态的同时抑制HGF表达,4-PBA和salubrinal可阻止内质网应激引起的HGF降低,但对ATF4和CHOP的表达作用不同。慢病毒转染T6降低细胞e If2α表达的同时成比例降低HGF表达。结论:ERS激活后可通过影响e If2α表达从而抑制HGF表达。 展开更多
关键词 内质网应激 肝细胞生长因子 真核翻译起始因子2α 肝星状细胞 苯基丁酸钠盐 salubrinal
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磷酸化哺乳动物雷帕霉素靶蛋白和磷酸化真核细胞翻译启示因子4E结合蛋白1在病理性瘢痕中的表达 被引量:1
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作者 张功宝 代涛 +4 位作者 袁德品 崔树英 张成书 李艳玲 程定 《中华医学美学美容杂志》 2015年第6期365-368,共4页
目的 探讨磷酸化哺乳动物雷帕霉素靶蛋白(p-mTOR)和磷酸化真核细胞翻译启始因子4E结合蛋白l(p-4EBP1)在病理性瘢痕、非病理性瘢痕及正常皮肤组织中的表达水平,了解其在病理性瘢痕形成中的意义.方法 采用免疫组织化学SP法检测p-mTOR... 目的 探讨磷酸化哺乳动物雷帕霉素靶蛋白(p-mTOR)和磷酸化真核细胞翻译启始因子4E结合蛋白l(p-4EBP1)在病理性瘢痕、非病理性瘢痕及正常皮肤组织中的表达水平,了解其在病理性瘢痕形成中的意义.方法 采用免疫组织化学SP法检测p-mTOR、p-4EBP1在20例瘢痕疙瘩、20例增生性瘢痕、20例非病理性瘢痕及20例正常皮肤组织中的表达水平,分析其在不同组织中表达阳性率及病理性瘢痕中两者相关关系.结果 瘢痕疙瘩和增生性瘢痕中p-mTOR、p-4EBP1蛋白阳性表达率分别为75.0%(15/20)和60.0%(12/20)、60.0%(12/20)和50.0%(10/20),高于非病理性瘢痕20%(4/20)和10% (2/20)及正常皮肤10% (2/20)和5% (1/20) (P<0.05);p-mTOR与p-4EBP1表达相关(r=0.338,P<0.05).结论 p-mTOR和p-4EBP1可能共同参与了病理性瘢痕的形成过程,且两者具有协同作用. 展开更多
关键词 磷酸化哺乳动物雷帕霉素靶蛋白 磷酸化真核细胞翻译启始因子4e结合蛋白1 病理性瘢痕 瘢痕疙瘩 增生性瘢痕 Phosphorylated eukaryotic translation initiation factor 4e binding protein 1
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黄灯笼辣椒eIF4Es基因克隆及其酵母双杂交激活域载体构建
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作者 张真 余乃通 +3 位作者 王健华 张秀春 武亚丹 刘志昕 《分子植物育种》 CAS CSCD 北大核心 2016年第8期2066-2070,共5页
通过对辣椒全基因组数据库分析获得黄灯笼辣椒eIF4E基因家族的四个基因,设计两端带有Eco RⅠ和XhoⅠ酶切位点的引物分别扩增四个基因的ORF,克隆到LexA-酵母双杂交系统的激活域载体pB42AD中,并构建pB42AD-eIF4E、pB42AD-eIF(iso)4E、pB42... 通过对辣椒全基因组数据库分析获得黄灯笼辣椒eIF4E基因家族的四个基因,设计两端带有Eco RⅠ和XhoⅠ酶切位点的引物分别扩增四个基因的ORF,克隆到LexA-酵母双杂交系统的激活域载体pB42AD中,并构建pB42AD-eIF4E、pB42AD-eIF(iso)4E、pB42AD-eIF4E-Xm、pB42AD-n CBP9090重组载体。将重组质粒导入酵母菌株EGY48(p8op-Lac Z)中,进行重组激活域载体的毒性检验和自激活验证。结果表明,扩增获得了正确的黄灯笼辣椒Cc-eIF4E、Cc-eIF(iso)4E、Cc-eIF4E-Xm、Cc-n CBP9090基因ORF,并成功克隆到pB42AD载体中,同时转化有激活域载体的EGY48(p8op-Lac Z)在SD/-Trp/-Ura营养缺陷型平板上生长良好,在SD/-His/-Ura平板上不生长,说明重组质粒表达产物对该酵母细胞无毒性,对下游报告基因无自激活作用。本研究结果证明pB42AD-eIF4E、pB42AD-eIF(iso)4E、pB42AD-eIF4E-Xm、pB42AD-n CBP9090重组载体可用于该系统的互作蛋白筛选,为下一步通过酵母双杂交系统筛选与黄灯笼辣椒eIF4E家族蛋白相互作用的病毒蛋白奠定基础。 展开更多
关键词 eIF4e家族 酵母双杂交 载体构建 自激活
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Total Saponins of Rubus Parvifolius L.Exhibited Anti-Leukemia Effect in vivo through STAT3 and eIF4E Signaling Pathways 被引量:2
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作者 XU Xiao-feng CHENG Ru-bin +1 位作者 ZHANG Xue-jin GAO Rui-lan 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2018年第12期920-924,共5页
Objective: To investigate the anti-leukemia effect of total saponins of Rubus parvifo/ius L. (TSRP) on K562 cell xenografts in nude mice and the mechanisms of action. Methods: The K562 cell xenografts in nude mice... Objective: To investigate the anti-leukemia effect of total saponins of Rubus parvifo/ius L. (TSRP) on K562 cell xenografts in nude mice and the mechanisms of action. Methods: The K562 cell xenografts in nude mice were established, and then randomly divided into 5 groups, the control group, the cytosine arabinoside group(Am-c) and 3 TSRP groups (20, 40 and 100 mg/kg). The tumor volume and mass of each group of nude mice were measured and the anti-tumor rates of TSRP were calculated subsequently. The apoptosis status of tumor cells was detected by hematoxylin-eosin (HE) and terminal dexynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL) staining analysis. Finally, the activities of apoptosis related signaling of signal transducer and activator of transcription 3 (STAT3), eukaryotic initiation factor 4E (eIF4E) and B-cell lymphoma-2 (bcl-2) were determined with immunohistochemistry tests. Results: Subcutaneous injection of K562 cells induced tumor formation in nude mice, and the TSRP treated group showed a significant inhibitory effect on tumor formation. The nude mice treated with TSRP showed a significant decrease in tumor growth rate and tumor weight in comparison to the control group (all P〈0.05). The HE staining and TUNEL assay showed that TSRP induced cell death by apoptosis. The immunohistochemical assay showed down-regulation of the bcl-2 gene in the TSRP treated cells. The phosphorylation levels of elF4E and STAT3 were decreased obviously after the treatment of TSRP. Conclusion: TSRP had an excellent tumor-suppressing effect on K562 cells in the nude mice xenograft model, suggesting that TSPR can be developed as a promising anti-chronic myeloide leukemia drug. 展开更多
关键词 total saponins of Rubus parvifolius L. xenograft model APOPTOSIS signal transducer and activator of transcription 3 eukaryotic initiation factor 4e
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