Native promoters that can drive high and stable transgene expression are important tools for modifying plant traits.Although several such promoters have been reported in soybean(Glycine max),few of them function at mu...Native promoters that can drive high and stable transgene expression are important tools for modifying plant traits.Although several such promoters have been reported in soybean(Glycine max),few of them function at multiple growth and development stages and during nodule development.Here,we report that the promoters of 40S RIBOSOMAL PROTEIN SMALL SUBUNIT S28(RPS28)and EUKARYOTIC TRANSLATION INITIATION FACTOR 1(EIF1)are ideal for high expression of transgene.Through bioinformatic analysis,we determined that RPS28 and EIF1 were highly expressed during soybean growth and development,nodule development,and various biotic and abiotic stresses.Fusion of both RPS28 and EIF1 promoters,with or without their first intron,with the reporter geneβ-GLUCURONIDASE(uidA)in transgenic soybean,resulted in high GUS activity in seedlings,seeds,and nodules.Fluorimetric GUS assays showed that the RPS28 promoter and the EIF1 promoter yielded high expression,comparable to the soybean Ubiquitin(GmUbi)promoter.RPS28 and EIF1 promoters were also highly expressed in Arabidopsis thaliana and Nicotiana benthamiana.Our results indicate the potential of RPS28 and EIF1 promoters to facilitate future genetic engineering and breeding to improve the quality and yield of soybean,as well as in a wide variety of other plant species.展开更多
目的:探索X-射线修复交叉互补基因1(X-ray repair cross-complementing gene 1,XRCC1)和真核生物翻译起始因子4E结合蛋白1(eukaryotic translation initiation factor 4E binding protein 1,EIF4EBP1)在食管胃结合部腺癌(adenocarcinoma...目的:探索X-射线修复交叉互补基因1(X-ray repair cross-complementing gene 1,XRCC1)和真核生物翻译起始因子4E结合蛋白1(eukaryotic translation initiation factor 4E binding protein 1,EIF4EBP1)在食管胃结合部腺癌(adenocarcinoma of esophagogastric junction,AEG)以及癌旁组织中的表达差异,进一步研究这些表达与AEG患者的临床病理特点之间的联系。方法:从TCGA(The Cancer Genome Atlas)数据库中检索了XRCC1和EIF4EBP1在胃癌患者中的表达水平和临床数据,并从中筛选出AEG患者的相关数据。研究其在胃癌和AEG中的表达水平和相关性,以及AEG的表达水平与总生存期之间的联系。对我院128例2014年1月至2019年12月的AEG组织和癌旁组织石蜡包埋切片进行免疫组化(immunohistochemistry,IHC)染色,检测XRCC1和EIF4EBP1蛋白的表达水平,同时收集患者的相关临床资料。研究这两种蛋白质的表达水平和它们之间的相关性,以及它们的表达水平与临床病理特征之间的联系。结果:在TCGA数据库里,XRCC1和EIF4EBP1在412个胃癌组织样本中的表达水平明显超过了36个正常组织样本(P<0.001)。并且在这412个胃癌组织样本中,XRCC1和EIF4EBP1的表达之间呈正相关关系(r=0.349,P<0.001)。在其中的AEG患者中,XRCC1和EIF4EBP1在99例AEG组织样本中的表达水平明显超过了14例正常食管胃结合部组织样本(XRCC1:P=0.015,EIF4EBP1:P=0.046),但在这99例AEG组织中,XRCC1和EIF4EBP1的表达之间没有显著相关性(P=0.066)。在临床样本中,128例AEG组织样本中XRCC1和EIF4EBP1的高表达率分别为53.1%(68/128)和82%(105/128),超过了癌旁组织样本的高表达率33.6%(43/128)和54.7%(70/128),且在128例AEG组织样本中,XRCC1和EIF4EBP1的表达呈现出正相关性(r=0.245,P=0.005)。在AEG组织中,XRCC1和EIF4EBP1的表达与患者的大体类型、是否神经侵犯、有无脉管癌栓、分化程度、T分期、N分期、HER-2的表达、临床分期以及总生存期之间,没有显示出具有统计学意义的相关性。在对AEG患者的总生存状况进行多因素分析时,脉管癌栓的形成(P=0.002)和临床分期(P=0.003)与患者的总生存率有着显著的关联。结论:在AEG组织中,XRCC1和EIF4EBP1的表达水平相对于癌旁组织更高,并且这两者表达之间存在正相关关系。在不同的XRCC1和EIF4EBP1表达水平的AEG患者中,无论是大体类型、是否侵犯神经、有无脉管癌栓、分化程度、T分期、N分期、HER-2的表达、临床分期还是总生存期,都没有显著的差异。脉管癌栓及临床分期是决定AEG患者生存预后的关键因素。展开更多
基金supported by National Natural Science Foundationof China(Grant No.31870257 and U21A20181 to X.W,Grant no.32170728 to H.W.)the National Key Research,and Development,Program(Grant No.2018YFE0112100 to X.W.)+1 种基金Excellent Youth Foundation of Henan Province(Grant No.222300420025 to H.W.)the 111 Project of China(Grant No.D16014).
文摘Native promoters that can drive high and stable transgene expression are important tools for modifying plant traits.Although several such promoters have been reported in soybean(Glycine max),few of them function at multiple growth and development stages and during nodule development.Here,we report that the promoters of 40S RIBOSOMAL PROTEIN SMALL SUBUNIT S28(RPS28)and EUKARYOTIC TRANSLATION INITIATION FACTOR 1(EIF1)are ideal for high expression of transgene.Through bioinformatic analysis,we determined that RPS28 and EIF1 were highly expressed during soybean growth and development,nodule development,and various biotic and abiotic stresses.Fusion of both RPS28 and EIF1 promoters,with or without their first intron,with the reporter geneβ-GLUCURONIDASE(uidA)in transgenic soybean,resulted in high GUS activity in seedlings,seeds,and nodules.Fluorimetric GUS assays showed that the RPS28 promoter and the EIF1 promoter yielded high expression,comparable to the soybean Ubiquitin(GmUbi)promoter.RPS28 and EIF1 promoters were also highly expressed in Arabidopsis thaliana and Nicotiana benthamiana.Our results indicate the potential of RPS28 and EIF1 promoters to facilitate future genetic engineering and breeding to improve the quality and yield of soybean,as well as in a wide variety of other plant species.
文摘目的:探索X-射线修复交叉互补基因1(X-ray repair cross-complementing gene 1,XRCC1)和真核生物翻译起始因子4E结合蛋白1(eukaryotic translation initiation factor 4E binding protein 1,EIF4EBP1)在食管胃结合部腺癌(adenocarcinoma of esophagogastric junction,AEG)以及癌旁组织中的表达差异,进一步研究这些表达与AEG患者的临床病理特点之间的联系。方法:从TCGA(The Cancer Genome Atlas)数据库中检索了XRCC1和EIF4EBP1在胃癌患者中的表达水平和临床数据,并从中筛选出AEG患者的相关数据。研究其在胃癌和AEG中的表达水平和相关性,以及AEG的表达水平与总生存期之间的联系。对我院128例2014年1月至2019年12月的AEG组织和癌旁组织石蜡包埋切片进行免疫组化(immunohistochemistry,IHC)染色,检测XRCC1和EIF4EBP1蛋白的表达水平,同时收集患者的相关临床资料。研究这两种蛋白质的表达水平和它们之间的相关性,以及它们的表达水平与临床病理特征之间的联系。结果:在TCGA数据库里,XRCC1和EIF4EBP1在412个胃癌组织样本中的表达水平明显超过了36个正常组织样本(P<0.001)。并且在这412个胃癌组织样本中,XRCC1和EIF4EBP1的表达之间呈正相关关系(r=0.349,P<0.001)。在其中的AEG患者中,XRCC1和EIF4EBP1在99例AEG组织样本中的表达水平明显超过了14例正常食管胃结合部组织样本(XRCC1:P=0.015,EIF4EBP1:P=0.046),但在这99例AEG组织中,XRCC1和EIF4EBP1的表达之间没有显著相关性(P=0.066)。在临床样本中,128例AEG组织样本中XRCC1和EIF4EBP1的高表达率分别为53.1%(68/128)和82%(105/128),超过了癌旁组织样本的高表达率33.6%(43/128)和54.7%(70/128),且在128例AEG组织样本中,XRCC1和EIF4EBP1的表达呈现出正相关性(r=0.245,P=0.005)。在AEG组织中,XRCC1和EIF4EBP1的表达与患者的大体类型、是否神经侵犯、有无脉管癌栓、分化程度、T分期、N分期、HER-2的表达、临床分期以及总生存期之间,没有显示出具有统计学意义的相关性。在对AEG患者的总生存状况进行多因素分析时,脉管癌栓的形成(P=0.002)和临床分期(P=0.003)与患者的总生存率有着显著的关联。结论:在AEG组织中,XRCC1和EIF4EBP1的表达水平相对于癌旁组织更高,并且这两者表达之间存在正相关关系。在不同的XRCC1和EIF4EBP1表达水平的AEG患者中,无论是大体类型、是否侵犯神经、有无脉管癌栓、分化程度、T分期、N分期、HER-2的表达、临床分期还是总生存期,都没有显著的差异。脉管癌栓及临床分期是决定AEG患者生存预后的关键因素。
基金supported by grants from The National Natural Science Foundation of China(81672478,81772671)the Beijing Natural Science Foundation(7151002)+1 种基金the Beijing Health System High-level Personnel Building Foundation(2013-3-018)the Beijing Laboratory of Biomedical Materials Foundation~~
文摘神经生长因子(NGF)结合细胞表面受体p75NTR (p75神经营养素受体)和TrkA (酪氨酸蛋白激酶A)后介导了细胞分化、细胞生存、凋亡、增殖和侵袭等多个重要的生理病理过程. TrKA能与细胞内多个蛋白质相互作用,但是由于NGF信号通路的复杂性,现在仍有必要发现与之相互作用的蛋白质以更准确地了解NGF信号通路.本研究中我们通过酵母双杂交的方法筛选到了一个新的与TrKA相互作用的蛋白质——真核生物翻译起始因子4A1 (eIF4A1),然后通过谷胱甘肽巯基转移酶融合蛋白沉降实验(GST-pull-down)和免疫共沉淀实验(Co-IP)证明了TrkA和eIF4A1的相互作用.此外NGF能够增强TrkA和eIF4A1的相互作用.在鉴定相互作用位点实验中,我们发现eIF4A1的氨基端结构域和TrkA的TK结构域参与了相互作用. TrkA和e IF4A1共定位在细胞膜上. NGF能够引起TrkA与泛素蛋白63位的赖氨酸连接,而eIF4A1与TrkA相互作用后能够抑制TrkA与泛素蛋白63位的赖氨酸连接.综上,得出结论 e IF4A1通过与TrkA相互作用抑制其泛素化调控NGF信号通路.
