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High-throughput RNA interference screens integrative analysis: Towards a comprehensive understanding of the virus-host interplay 被引量:9
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作者 Sandeep Amberkar Narsis A Kiani +2 位作者 Ralf Bartenschlager Gualtiero Alvisi Lars Kaderali 《World Journal of Virology》 2013年第2期18-31,共14页
Viruses are extremely heterogeneous entities; the size and the nature of their genetic information, as well as the strategies employed to amplify and propagate their genomes, are highly variable. However, as obligator... Viruses are extremely heterogeneous entities; the size and the nature of their genetic information, as well as the strategies employed to amplify and propagate their genomes, are highly variable. However, as obligatory intracellular parasites, replication of all viruses relies on the host cell. Having co-evolved with their host for several million years, viruses have developed very sophisticated strategies to hijack cellular factors that promote virus uptake, replication, and spread. Identification of host cell factors(HCFs) required for these processes is a major challenge for researchers, but it enables the identification of new, highly selective targets for anti viral therapeutics. To this end, the establishment of platforms enabling genome-wide high-throughput RNA interference(HT-RNAi) screens has led to the identification of several key factors involved in the viral lifecycle. A number of genome-wide HT-RNAi screens have been performed for major human pathogens. These studies enable first inter-viral comparisons related to HCF requirements. Although several cellular functions appear to be uniformly required for the life cycle of most viruses tested(such as the proteasome and the Golgi-mediated secretory pathways), some factors, like the lipid kinase Phosphatidylinositol 4-kinase Ⅲα in the case of hepatitis C virus, are selectively required for individual viruses. However, despite the amount of data available, we are still far away from a comprehensive understanding of the interplay between viruses and host factors. Major limitations towards this goal are the low sensitivity and specificity of such screens, resulting in limited overlap between different screens performed with the same virus. This review focuses on how statistical and bioinformatic analysis methods applied to HTRNAi screens can help overcoming these issues thus increasing the reliability and impact of such studies. 展开更多
关键词 rna interference HIGH-THROUGHPUT Cell population Dependency factors Bioinformatics Human immunodeficiency VIRUS Hepatitis C VIRUS DENGUE VIRUS Viral infection Virus-host interactions
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Suppression of starch synthase I(SSI) by RNA interference alters starch biosynthesis and amylopectin chain distribution in rice plants subjected to high temperature 被引量:5
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作者 Qian Zhao Xiaoxia Du +5 位作者 Zhanyu Han Yu Ye Gang Pan Muhammad-Asad-Ullah Asad Qifa Zhou Fangmin Cheng 《The Crop Journal》 SCIE CAS CSCD 2019年第5期573-586,共14页
Based on known cDNAs of rice starch synthase isoforms,we constructed dsRNA interference vectors for starch synthase I(SSI)to produce transgenic plants containing starch with a moderately high amylose content.We invest... Based on known cDNAs of rice starch synthase isoforms,we constructed dsRNA interference vectors for starch synthase I(SSI)to produce transgenic plants containing starch with a moderately high amylose content.We investigated the effect of SSI suppression on grain quality traits,starch biosynthesis,and amylopectin chain distribution in rice plants exposed to two different temperature regimes.The activities and transcripts of BEs,DBEs,and other SS isoforms were further investigated to clarify the effect of SSI suppression on these key enzymes and their specific isoforms under different temperature treatments.Suppression of SSI by RNAi altered grain starch component and amylopectin chain distribution,but it exerted only a slight effect on total starch content(%)and accumulation amount(mg kernel?1)and on starch granule morphology and particle size distribution.Under normal temperature(NT),insignificant differences in kernel weight,chalky kernel proportion,chalky degree,and starch granule morphology between SSI-RNAi line and its wild type(WT)were observed.However,amylose content(AC)level and granule-bound starch synthase(GBSS)activity in rice endosperms were markedly increased by SSI-RNAi suppression.The chalky kernel proportion and chalky degree of SSIRNAi lines were significantly higher than those of WT under high temperature(HT)exposure at filling stage.Inhibition of SSI by RNAi affected amylopectin chain distribution and raised starch gelatinization temperature(GT)in two ways:directly from the SSI deficiency itself and indirectly by reducing BEIIb amounts in an SSI-deficient background.The deficiency of SSI expression led to an alteration in the susceptibility of grain chalkiness occurrence and starch gelatinization temperature to HT exposure,owing to a pleiotropic effect of SSI deficiency on the expression of other genes associated with starch biosynthesis. 展开更多
关键词 Rice STARCH SYNTHASE I rna interference Grain quality AMYLOPECTIN High temperature
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RNA复制子疫苗研究进展 被引量:4
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作者 杨冬 欧阳松应 +1 位作者 王云龙 欧阳红生 《生物技术通讯》 CAS 2005年第3期310-312,共3页
最近兴起的RNA复制子疫苗,利用源自病毒的能够自主复制的RNA,其结构蛋白基因由外源抗原基因取代,保留了非结构蛋白(RNA复制酶)基因。RNA复制酶可使RNA载体在细胞质中高水平复制,并实现外源抗原基因的高水平表达,可同时诱导细胞免疫和体... 最近兴起的RNA复制子疫苗,利用源自病毒的能够自主复制的RNA,其结构蛋白基因由外源抗原基因取代,保留了非结构蛋白(RNA复制酶)基因。RNA复制酶可使RNA载体在细胞质中高水平复制,并实现外源抗原基因的高水平表达,可同时诱导细胞免疫和体液免疫应答。大量双链RNA可诱导被感染细胞凋亡,宿主细胞的凋亡有利于免疫系统识别外源抗原。RNA复制子疫苗克服了传统疫苗和普通DNA疫苗存在的缺点,具有抗原表达效率高、安全性好、应用范围广等优点,因而被视为一种发展前景很好的疫苗形式。目前已对一些疾病模型基于复制子的治疗性和预防性疫苗进行了研究(涉及的对象包括病毒、肿瘤以及细菌毒素等),并对某些不足之处进行了改进。 展开更多
关键词 双链rna DNA 宿
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短发卡状PTI-1(PC-3)基因特异性RNA干扰表达载体对PC-3细胞的体外效应 被引量:1
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作者 宋斌 王禾 +2 位作者 赵晶 秦卫军 杨安钢 《第四军医大学学报》 北大核心 2005年第9期824-827,共4页
目的:通过基因克隆技术构建人前列腺癌PC3细胞系PTI1(PC3)基因[prostatecarcinomatumor inducinggene1(PC3)]的特异性短发卡shRNA(short hairpinRNA)真核表达载体,采用RNA干扰(RNAinterference,RNAi)技术,体外观察对PC3细胞系PTI1(PC3)... 目的:通过基因克隆技术构建人前列腺癌PC3细胞系PTI1(PC3)基因[prostatecarcinomatumor inducinggene1(PC3)]的特异性短发卡shRNA(short hairpinRNA)真核表达载体,采用RNA干扰(RNAinterference,RNAi)技术,体外观察对PC3细胞系PTI1(PC3)基因的沉默作用以及干扰后对PC3细胞的体外效应.方法:采用基因克隆技术,将合成的短发卡样特异性PTI1(PC3)RNA干扰寡核苷酸序列插入真核表达载体pEGFP/U6,构建PTI1(PC3)shRNA的真核表达载体,体外转染人前列腺癌PC3细胞,48h后观察细胞生物学变化;提取转染细胞总RNA及总蛋白,行RT PCR以及West ernblot观测胞内PTI1(PC3)mRNA及蛋白水平.结果:①成功构建短发卡样PTI1(PC3)shRNA真核表达载体pEGFP/U6mPs;②转染(脂质体法)PC3细胞,48h后细胞大部分死亡;③转染48h后细胞内PTI1(PC3)mRNA水平下降;④转染48h后下调胞内PTI1(PC3)蛋白水平.结论:本实验成功构建的shRNA真核表达载体通过RNA干扰,能够干扰人前列腺癌PC3细胞内PTI1(PC3)基因的表达,抑制PTI1(PC3)蛋白的表达,降低了由PTI1蛋白可能发挥的“翻译失真性”作用,促进癌细胞的死亡,进一步揭示了PTI1在前列腺癌发生、发展过程中的显性癌基因作用.由于RNA干扰的特异性从而为临床上前列腺癌的基因治疗提供了新的可能的方法. 展开更多
关键词 PC-3 特异性rna干扰 carcinoma Western PEGFP PTI-1 RT-PCR mrna水平 shrna gene rna blot
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STUB1基因RNA干扰慢病毒载体的构建与鉴定 被引量:3
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作者 赵虹 张惊宇 +2 位作者 徐万海 杨子超 赵庆杰 《浙江大学学报(医学版)》 CAS CSCD 北大核心 2010年第6期623-627,共5页
目的:构建人STUB1基因RNA干扰(RNA interference,RNAi)慢病毒表达载体并进行鉴定。方法:针对筛选确定的人STUB1基因RNAi有效靶点序列,合成靶序列的Oligo DNA,退火形成双链DNA,与经AgeI和EcoRI酶切后的pMagic 4.0载体连接,产生短发卡RNA... 目的:构建人STUB1基因RNA干扰(RNA interference,RNAi)慢病毒表达载体并进行鉴定。方法:针对筛选确定的人STUB1基因RNAi有效靶点序列,合成靶序列的Oligo DNA,退火形成双链DNA,与经AgeI和EcoRI酶切后的pMagic 4.0载体连接,产生短发卡RNA慢病毒载体。PCR筛选阳性克隆,测序鉴定,并包装成慢病毒颗粒。结果:PCR鉴定与DNA测序证实,合成的含STUB1 shRNA慢病毒载体寡核苷酸链插入正确。STUB1 shRNA慢病毒载体在293T细胞中成功包装成慢病毒颗粒。结论:成功构建人STUB1基因RNAi慢病毒载体以及包装成功慢病毒颗粒,为研究STUB1在胶质瘤发生发展过程中相关信号通路的作用,提供了稳定感染细胞的载体。 展开更多
关键词 rna干扰 rna interference LENTIVIRAL vector rnai shrna DNA
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EGFR突变NSCLC组织LncRNA TCF7L2表达及临床病理特征和预后分析
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作者 董跃华 王贵刚 +3 位作者 杨燕君 魏玉磊 高永山 姜伟华 《青岛大学学报(医学版)》 CAS 2024年第3期403-406,共4页
目的 探究长链非编码RNA(LncRNA)转录因子7类似物2(TCF7L2)在表皮生长因子受体基因(EGFR)突变的非小细胞肺癌(NSCLC)组织表达及其与病人临床病理特征和预后相关性。方法 选取2019年3月—2021年6月河北北方学院附属第一医院治疗的EGFR突... 目的 探究长链非编码RNA(LncRNA)转录因子7类似物2(TCF7L2)在表皮生长因子受体基因(EGFR)突变的非小细胞肺癌(NSCLC)组织表达及其与病人临床病理特征和预后相关性。方法 选取2019年3月—2021年6月河北北方学院附属第一医院治疗的EGFR突变NSCLC病人104例为研究对象,分别取其癌组织和癌旁组织应用逆转录PCR(RT-PCR)检测LncRNA TCF7L2的表达,比较不同组织TCF7L2表达及其与临床病理特征和预后的相关性。结果 RT-PCR检测结果显示,癌组织中LncRNA TCF7L2表达量显著高于癌旁组织(t=12.410,P<0.05)。与LncRNA TCF7L2低表达病人比较,高表达者发生淋巴结转移更多、肿瘤体积更大(χ^(2)=4.579、7.762,P<0.05);LncRNA TCF7L2高表达病人6、9和12个月的生存率较低,但差异均无统计学意义(P>0.05)。结论 LncRNA TCF7L2在EGFR突变NSCLC病人癌组织表达高于癌旁组织,且TCF7L2高表达病人的淋巴结转移风险较高、肿瘤体积较大,其生存率可能较低。 展开更多
关键词 rna 72 ERBB-1
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Inhibition of human La protein by RNA interference downregulates hepatitis B virus mRNA in 2.2.15 cells 被引量:13
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作者 QinNi ZhiChen +3 位作者 Hang-PingYao Zheng-GangYang Ke-ZhouLiu Ling-LingWu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2004年第14期2050-2054,共5页
AIM: To investigate the role of human La protein in HBV mRNA expression.METHODS: Three human La protein (hLa) specific siRNA expression cassettes (SECs) containing U6+1 promoter were prepared via one-step overlapping ... AIM: To investigate the role of human La protein in HBV mRNA expression.METHODS: Three human La protein (hLa) specific siRNA expression cassettes (SECs) containing U6+1 promoter were prepared via one-step overlapping extension PCR. After transfection with SECs into HepG2 cells, inhibition effects on hLa expression were analyzed by semi-quantitative RT-PCR and Western blotting. Then, effective SECs were screened out and transfected into 2.2.15 cells, a stable HBV-producing cell line. HBV surface antigen(HBsAg) and e antigen (HBeAg) secretions into culture media were detected by microparticle enzyme immunoassay (MEIA) and HBs and HBe mRNA levels were analyzed by semi-quantitative RT-PCR.RESULTS: SEC products containing U6+1 snRNA promoter,and 3 sites of hLa mRNA specific siRNA were obtained successfully by one-step overlapping extension PCR and could be directly transfected into HepG2 cells, resulting in inhibition of La protein expression in both mRNA and protein levels, among which U6+l-hLa833 was the most efficient,which reduced 18.6-fold mRNA and 89% protein level respectively. In 2.2.15 cells, U6+l-hLa833 was also efficient on inhibition of hLa expression. Furthermore, semi-quantitative RT-PCR showed that HI3s and HBe mRNA levels were significantly decreased by 8-and 66-fold in U6+l-hLa833 transfected cells compared to control. Accordingly, HBsAg and HBeAg secretions were decreased partly posttransfection with SECs.CONCLUSION: PCR-based SECs can be used to mediate RNAi in mammalian cells and provide a novel approach to study the function of La protein. The inhibition of La protein expression can result in a significant decrease ofHBV mRNA, which implies that the hLa protein is also involved HBV RNA metabolism as one of the HBV RNA-stabilizing factors in human cells. 展开更多
关键词 LA rna调节 HEV Mrna 2.2.15 SECs
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小汤山医院SARS病房内外空气中SARS病毒及其RNA的检测 被引量:10
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作者 魏巍 李劲松 +3 位作者 肖文君 王明连 王洁 辛英 《中国卫生检验杂志》 CAS 2005年第6期648-651,共4页
目的:了解小汤山医院病区空气中的SARS病毒污染情况。方法:2003年6月4日~8日采用FA-II型空气微生物采样器在病房、内走廊、护士站和病房排气口下风向5m处4个地点连续采样4d。之后进行空气样本的洗脱、Vero-E6细胞培养、RT-PCR及序列测... 目的:了解小汤山医院病区空气中的SARS病毒污染情况。方法:2003年6月4日~8日采用FA-II型空气微生物采样器在病房、内走廊、护士站和病房排气口下风向5m处4个地点连续采样4d。之后进行空气样本的洗脱、Vero-E6细胞培养、RT-PCR及序列测定。结果:小汤山医院每天采集19个空气样品,4d共采集76个空气样品。病房、内走廊、护士站和病房排气口下风向5m处4个地点均有病毒核酸检出,其中以病房排气口下风向5m处的阳性率最高(58.3%),护士站相对较低(25.0%);病房(52.1%)和内走廊(50.0%)的阳性率相当。结论:小汤山医院空气中SARS病毒的污染比较严重,急性后期的病患仍然从呼吸道大量排毒;但在病房室内外的空气中没有检测到活的SARS病毒,初步评估认为,SARS病人病房采取通风和消毒的措施对降低室内污染程度是非常有益的;而空气消毒和环境因素对SARS病毒的存活有较大的影响,故SARS病人病房排出的空气对周边环境造成的危害很小。 展开更多
关键词 SARS SARS rna SARS 20036 Vero-E6 RT-PCR
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Lentivirual vector-mediated doxycycline-inducible iASPP gene targeted RNA interference in hepatocellular carcinoma 被引量:11
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作者 Ming-Shu Pang Xia Chen +4 位作者 Bin LU Jian Zhao Bo-Hua Li Yu-Quan Wei Ya-Jun GUO 《Chinese Journal of Cancer》 SCIE CAS CSCD 北大核心 2010年第9期796-801,共6页
Background and Objective:iASPP, an inhibitory member of the apoptosis-stimulating proteins of p53 (ASPP) family, has been found to be up-regulated in various human tumor types.This study was to construct an efficient ... Background and Objective:iASPP, an inhibitory member of the apoptosis-stimulating proteins of p53 (ASPP) family, has been found to be up-regulated in various human tumor types.This study was to construct an efficient doxycycline-regulated, lentiviral vector-mediated knockdown system for iASPP that will allow for inducible down-regulation of iASPP gene expression and preliminary functional analysis.Methods:A pair of complementary oligos with hairpin structures targeting the iASPP gene and a negative control were synthesized, then ligated with pLVTHM vector and sequenced.The fragment containing the shRNA cassette was cloned to pLVCT-tTR-KRAB plasmid.The recombinant vectors were co-transfected with viral packaging mix into 293T cells, and viral supernatant was harvested to determine the titer.After treatment with or without doxycycline, HepG2 cells infected with virus were harvested and the expression of iASPP was detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis.Its effects on tumor growth were characterized using MTS assay, soft agar colony formation, and flow cytometry analysis.Results:The lentiviral vector expressing shRNA that targets to the oncogene iASPP was constructed successfully.HepG2 infected with the lentivirus expressing shRNA against iASPP inhibited the expression of iASPP in the presence of doxycycline, which resulted in the repression of tumor cell proliferation and anchorage-independent growth potential.Conclusions:The lentiviral vector-mediated tet-on system demonstrates efficient and inducible knockdown of iASPP in hepatocellular carcinoma cells.iASPP gene may be involved in tumorigenesis and progression of human tumors. 展开更多
关键词 rna干扰 HepG2
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FLIP干扰性小RNA促进大肠癌细胞的凋亡 被引量:5
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作者 孙保存 臧凤琳 +3 位作者 牛瑞芳 魏熙胤 赵秀兰 张诗武 《世界华人消化杂志》 CAS 北大核心 2005年第13期1519-1523,共5页
目的:研究对应FLIP基因的siRNA片段对大肠癌细胞株HT-29凋亡的影响,明确FLIP在Fas介导的凋亡途径中的作用. 方法:体外培养大肠癌细胞HT-29,通过电穿孔技术将特异性siRNA片段转染入细胞,半定量RT-PCR 法判断干扰前后FLIP mRNA水平的变化... 目的:研究对应FLIP基因的siRNA片段对大肠癌细胞株HT-29凋亡的影响,明确FLIP在Fas介导的凋亡途径中的作用. 方法:体外培养大肠癌细胞HT-29,通过电穿孔技术将特异性siRNA片段转染入细胞,半定量RT-PCR 法判断干扰前后FLIP mRNA水平的变化,分析RNA 干扰的特异性、时效性,并比较对应不同位点的两个siRNA片段对FLIP的干扰效果.经凋亡诱导型抗体激活后,以Annexin V染色法及DNA降解片段检测分析干扰前后HT-29细胞对Fas介导的凋亡敏感性的改变. 结果:特异性siRNA片段能有效降低FLIP mRNA水平,最大干扰效率达65.02%,明显高于作为对照的非相关片段;干扰作用于转染后24 h即可出现,48 h达高峰,72 h稍有降低;对应不同位点的两个siRNA片段对FLIP均可产生干扰作用,彼此间差别不大.在诱导型抗体的刺激下,与未转染细胞相比,转染siRNA 的HT-29细胞中凋亡细胞所占比例明显增加. 结论:特异性siRNA片段可显著降低FLIP基因mRNA 的表达水平,并提高HT-29细胞对Fas介导的凋亡敏感性.以FLIP为靶点的RNA干扰技术可望成为大肠癌基因治疗的新方法. 展开更多
关键词 FLIP 干扰性小rna HT-29 HT-29 RT-PCR rna片段 mrna水平 FAS Annexin DNA rna干扰技术 基因mrna 穿 sirna
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Down-Regulated Expression of RACK1 Gene by RNA Interference Enhances Drought Tolerance in Rice 被引量:15
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作者 LI Da-hong LIU Hui +2 位作者 YANG Yan-li ZHEN Ping-ping LIANG Jian-sheng 《Rice science》 SCIE 2009年第1期14-20,共7页
The receptor for activated C-kinase 1 (RACK1) is a highly conserved scaffold protein with versatile functions, and plays important roles in the regulation of plant growth and development. Transgenic rice plants, in ... The receptor for activated C-kinase 1 (RACK1) is a highly conserved scaffold protein with versatile functions, and plays important roles in the regulation of plant growth and development. Transgenic rice plants, in which the expression of RACK1 gene was inhibited by RNA interference (RNAi), were studied to elucidate the possible functions of RACK1 in responses to drought stress in rice. Real-time PCR analysis showed that the expression of RACK1 in transgenic rice plants was inhibited by more than 50%. The tolerance to drought stress of the transgenic rice plants was higher as compared with the non-transgenic rice plants. The peroxidation of membrane and the production of malondialdehyde were significantly lower and the superoxide dismutase activity in transgenic rice plants was significantly higher than those in non-trangenic rice plants It is suggested that RACK1 negatively regulated the redox system-related tolerance to drought stress of rice plants. 展开更多
关键词 Oryza sativa receptor for activated C-kinase 1 gene rna interference transgenic plant drought stress real-time quantitative RT-PCR gene expression
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Down-regulation of IL-8 expression in human airway epithelial cells through helper-dependent adenoviral-mediated RNA interference 被引量:5
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作者 HuibiCAO AnanWANG +4 位作者 BernardMARTIN A.KeithTANAWELL JimHU DavidR.KOEHLER PamelaL.ZEITLIN 《Cell Research》 SCIE CAS CSCD 2005年第2期111-119,共9页
Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either in response to external stimuli such as cytokines or bac... Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either in response to external stimuli such as cytokines or bacterial infection, or aftermalignant transformation. Anti-IL-8 strategies have been considered for anti-inflammatory therapy. In this paper wedemonstrate that the RNA interference technique can be used to efficiently down-regulate IL-8 protein expression inairway epithelial cells. We used a helper-dependent adenoviral vector to express a small hairpin (sh)RNA targetinghuman IL-8 in cultured airway epithelial cells (IB3-1, Cftr-/-; C38, Cftr-corrected) stimulated with TNF-α, IL-1β orheat-inactivated Burkholderia cenocepacia. Stimulated IL-8 expression in IB3-1 and C38 cells was significantly reducedby shRNA expression. The shRNA targeting IL-8 had no effect on the activation of NF-κB, or on the protein levels ofIκB or IL-6, suggesting that this anti-IL-8 strategy was highly specific, and therefore may offer potential for thetreatment of inflammatory diseases. 展开更多
关键词 INTERLEUKIN-8 rna interference helper-dependent adenoviral vector inflammation CHEMOKINE neutrophil cystic fibrosis.
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短发卡样RNA抑制c-myc癌基因在乳腺癌细胞中的过度表达
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作者 翟荣林 王国斌 《华中医学杂志》 CAS 2005年第3期187-189,共3页
目的构建人cmyc癌基因特异性短发卡样RNA(shRNA)真核表达载体,抑制靶基因cmyc在乳腺癌细胞中的过度表达。方法设计有小发夹结构的三条寡核苷酸序列,克隆至空载体pEGFPC1/U6中构建重组体并体外转染乳腺癌细胞株MCF7,48h后分别用RTPCR和We... 目的构建人cmyc癌基因特异性短发卡样RNA(shRNA)真核表达载体,抑制靶基因cmyc在乳腺癌细胞中的过度表达。方法设计有小发夹结构的三条寡核苷酸序列,克隆至空载体pEGFPC1/U6中构建重组体并体外转染乳腺癌细胞株MCF7,48h后分别用RTPCR和Westernblot方法检测胞内cmyc癌基因mRNA水平和蛋白水平。结果①成功构建shRNA真核表达载体;②shRNA表达载体转染MCF7细胞48h后,pEGFPC1/U62能明显下调胞内cmycmRNA水平和蛋白水平(P<0.01)。结论构建的shRNA真核表达载体能显著抑制cmyc癌基因在MCF7细胞中的过表达。 展开更多
关键词 C-MYC MCF-7 PEGFP-C1 MCF-7 mrna水平 Western rna真核表达 shrna RT-PCR blot
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不同强度的耐力运动对糖尿病大鼠骨骼肌GLUT4 mRNA表达的影响 被引量:36
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作者 刘传道 江钟立 +2 位作者 朱红军 林枫 陈子庆 《中国康复医学杂志》 CAS CSCD 北大核心 2005年第4期244-247,共4页
目的:探讨不同强度的耐力运动对糖尿病大鼠骨骼肌GLUT4 mRNA表达的影响。方法:雄性SD大鼠,其中36只大鼠经尾静脉注射链脲霉素,建立糖尿病模型。然后随机分为低强度运动组(EL)、高强度运动组(EH)、低强度运动加胰岛素治疗组(LI)、高强度... 目的:探讨不同强度的耐力运动对糖尿病大鼠骨骼肌GLUT4 mRNA表达的影响。方法:雄性SD大鼠,其中36只大鼠经尾静脉注射链脲霉素,建立糖尿病模型。然后随机分为低强度运动组(EL)、高强度运动组(EH)、低强度运动加胰岛素治疗组(LI)、高强度运动加胰岛素治疗组(HI)、胰岛素治疗非运动组(DI)和非胰岛素治疗非运动组(DM)。6只SD大鼠为非运动正常血糖组(CN)。耐力训练采用活动平板,胰岛素采用皮下注射,共8周。运用RT-PCR法测定骨骼肌GLUT4 mRNA。结果:DM组骨骼肌GLUT4 mRNA表达水平显著低于其它各组(P<0.05)。LI组骨骼肌GLUT4 mRNA表达水平明显增高接近CN组,并且显著高于DI组。DI组GLUT4 mRNA含量与EL、EH、HI各组相当,差异无显著性意义。结论:运动可以促进GLUT4m RNA的表达,而运动强度对GLUT4 mRNA表达量无显著影响;低强度运动加胰岛素所具有最佳的GLUT4 mRNA表达水平是其它单独干预措施所无法替代的。 展开更多
关键词 GLUT4 尿 RT-PCR mrna表达量 SD 尿 rna含量
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Expression signatures of long non-coding RNA and mRNA in human traumatic brain injury 被引量:8
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作者 Li-Xiang Yang Li-Kun Yang +3 位作者 Jie Zhu Jun-Hui Chen Yu-Hai Wang Kun Xiong 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第4期632-641,共10页
Long non-coding RNAs(lncRNAs) play a key role in craniocerebral disease, although their expression profiles in human traumatic brain injury are still unclear. In this regard, in this study, we examined brain injury ti... Long non-coding RNAs(lncRNAs) play a key role in craniocerebral disease, although their expression profiles in human traumatic brain injury are still unclear. In this regard, in this study, we examined brain injury tissue from three patients of the 101 st Hospital of the People's Liberation Army, China(specifically, a 36-year-old male, a 52-year-old female, and a 49-year-old female), who were diagnosed with traumatic brain injury and underwent brain contusion removal surgery. Tissue surrounding the brain contusion in the three patients was used as control tissue to observe expression characteristics of lncRNAs and mRNAs in human traumatic brain injury tissue. Volcano plot filtering identified 99 lncRNAs and 63 mRNAs differentially expressed in frontotemporal tissue of the two groups(P < 0.05, fold change > 1.2). Microarray analysis showed that 43 lncRNAs were up-regulated and 56 lncRNAs were down-regulated. Meanwhile, 59 mRNAs were up-regulated and 4 mRNAs were down-regulated. Gene Ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) analyses revealed 27 signaling pathways associated with target genes and, in particular, legionellosis and influenza A signaling pathways. Subsequently, a lncRNA-gene network was generated, which showed an absolute correlation coefficient value > 0.99 for 12 lncRNA-mRNA pairs. Finally, quantitative real-time polymerase chain reaction confirmed different expression of the five most up-regulated mRNAs within the two groups, which was consistent with the microarray results. In summary, our results show that expression profiles of mRNAs and lncRNAs are significantly different between human traumatic brain injury tissue and surrounding tissue, providing novel insight regarding lncRNAs' involvement in human traumatic brain injury. All participants provided informed consent. This research was registered in the Chinese Clinical Trial Registry(registration number: ChiCTR-TCC-13004002) and the protocol version number is 1.0. 展开更多
关键词 nerve REGENERATION HUMAN TRAUMATIC brain injuries long noncoding rna messenger rna GO ANALYSIS real-time quantitative POLYMERASE chain reaction biomarkers microarray ANALYSIS biological processes medical informatics neural REGENERATION
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shRNA干扰Jurkat细胞株MDM2表达对细胞生物特性的影响 被引量:3
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作者 朱有凯 林汉良 +3 位作者 顾霞 张萌 吴红阳 许湘 《临床与实验病理学杂志》 CAS CSCD 北大核心 2005年第3期347-350,共4页
目的研究MDM2基因与白血病细胞生物学特性的关系。方法应用pSilencer4.1CMVneo构建MDM2shRNA表达载体pMDM2shRNA,采用脂质体将载体导入Jurkat细胞,利用G418筛选出稳定表达shRNA细胞后,行RTPCR和Westernblot等技术检测细胞MDM2表达水平... 目的研究MDM2基因与白血病细胞生物学特性的关系。方法应用pSilencer4.1CMVneo构建MDM2shRNA表达载体pMDM2shRNA,采用脂质体将载体导入Jurkat细胞,利用G418筛选出稳定表达shRNA细胞后,行RTPCR和Westernblot等技术检测细胞MDM2表达水平、基础生长曲线、细胞周期变化以及UV照射后细胞生长变化。结果发现转染pMDM2shRNA的细胞MDM2mRNA及蛋白质的表达均下降>50%,细胞的生长减慢,出现一定程度的G1~S期阻滞,DNA损伤后细胞恢复较慢。结论MDM2基因表达下降后,可导致细胞增殖减慢以及降低损伤修复的能力;细胞内表达shRNA可长期敲低靶基因的表达,可作为较理想的基因功能研究细胞模型。 展开更多
关键词 JURKAT rna干扰 MDM2mrna Western MDM2 RT-PCR DNA shrna blot 线 uV
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博尔纳病病毒持续感染细胞系中病毒RNA的原位PCR检测
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作者 杨爱英 张凤民 +4 位作者 马培林 林志国 刘玉芳 谷鸿喜 生田和良 《中国微生态学杂志》 CAS CSCD 2005年第3期170-171,共2页
目的建立检测博尔纳病病毒(BDV)RNA的原位PCR方法。方法首先设计BDV特异性引物以及检测BDV-RNA的原位PCR扩增系统,然后对BDV持续感染细胞(BDV/OL)和正常细胞(OL细胞)爬片进行原位PCR扩增,进而分别用DNA酶或RNA酶消化处理BDV/OL细胞爬片... 目的建立检测博尔纳病病毒(BDV)RNA的原位PCR方法。方法首先设计BDV特异性引物以及检测BDV-RNA的原位PCR扩增系统,然后对BDV持续感染细胞(BDV/OL)和正常细胞(OL细胞)爬片进行原位PCR扩增,进而分别用DNA酶或RNA酶消化处理BDV/OL细胞爬片后,再进行原位PCR扩增。结果经原位PCR扩增后,约60%~70%的BDV持续感染细胞核中出现了阳性反应信号,但正常细胞无信号出现,并且病毒感染细胞中的阳性信号在RNA酶消化作用下消失,但不受DNA酶作用的影响。结论该研究建立的PCR检测方法具有BDV和RNA特异性,可以应用于检测相关动物或神经精神疾病患者的脑组织中BDV-RNA,为进一步证明BDV的致病性奠定基础。 展开更多
关键词 PCR PCR rna PCR DNA
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家族性胆固醇结石患者肝组织HMGCR和SCP_2mRNA的表达 被引量:4
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作者 崔云峰 崔乃强 +1 位作者 李东华 张琚 《世界华人消化杂志》 CAS 北大核心 2005年第9期1115-1118,共4页
目的:研究家族遗传性胆囊胆固醇结石患者、非家族遗传性胆囊胆固醇结石患者和非胆固醇结石患者肝组织HMGCoA还原酶(HMGCR)、固醇携带蛋白2(SCP2)基因mRNA的表达情况,进而明确二者在胆石形成中的作用.方法:选取2003-08/2004-08天津市南... 目的:研究家族遗传性胆囊胆固醇结石患者、非家族遗传性胆囊胆固醇结石患者和非胆固醇结石患者肝组织HMGCoA还原酶(HMGCR)、固醇携带蛋白2(SCP2)基因mRNA的表达情况,进而明确二者在胆石形成中的作用.方法:选取2003-08/2004-08天津市南开医院外科住院病例90例,均取得患者及家属知情同意,其中家族遗传性胆囊胆固醇结石患者28例,非家族遗传性胆囊胆固醇结石患者30例,非胆固醇结石患者32例,术中肝活检,行肝组织总RNA提取,逆转录反应合成cDNA,设计引物,进行聚合酶链反应(PCR)扩增HMGCR和SCP2基因的目的片段,检测肝组织mRNA的表达水平的不同.结果:家族遗传性和非家族遗传性胆固醇结石组HMGCR,SCP2mRNA表达水平较非胆固醇结石组升高;其中HMG(:RmRNA表达在家族遗侉}生胆固醇结石组为1.9269±0.2134,非家族遗传性组为1.9791±0.2524,二者均高于非胆固醇结石组0.7730±0.1530,差异有显著性(P<0.05);SCP2mRNA表达在家族遗传性胆固醇结石组为0.8908±0.1649,非家族遗传性组为0.7503±0.1004,二者均高于非胆固醇结石组0.5205±0.1900,差异有显著性(P<0.05);家族遗传性胆固醇结石SCP2mRNA表达水平较非家族遗传性胆固醇结石组升高,差异有显著性(P<0.05),而HMGCRmRNA在家族遗传性和非家族遗传性胆固醇结石组两组间无统计学差别.结论:胆囊胆固醇结石患者肝组织HMGCR,SCP2mRNA表达水平升高是胆囊胆固醇结石形成的重要原因. 展开更多
关键词 (pCR) mrna表达 SCP2 HMGCoA 基因Mrna rna提取 cDNA P2
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Adenovirus-mediated short hairpin RNA interference against p75 neurotrophin receptor in pheochromocytoma cells
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作者 Dongxu Feng Haopeng Li +2 位作者 Siyue Xu YU Liu Xiaofei Hou 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第7期517-522,共6页
Previous studies have confirmed that motor neuron apoptosis in the anterior horn of the lumbosacral spinal cord is positively correlated with p75 neurotrophin receptor (p75NTR) expression in rat models of cauda equi... Previous studies have confirmed that motor neuron apoptosis in the anterior horn of the lumbosacral spinal cord is positively correlated with p75 neurotrophin receptor (p75NTR) expression in rat models of cauda equina syndrome. This study used adenovirus to carry a short hairpin RNA (shRNA) for p75NTR gene silencing, to reduce p75NTR expression in the damaged phase and to decrease motor neuron apoptosis. Three p75 siRNA template oligonucleotide segments (shRNA) were designed, and cloned into the 1.0 CMV shuttle vector. HEK293 cells were cotransfected with shuttle vector (carrying shRNA) and an adenovirus vector framework expressing enhanced green fluorescent protein. Thus, this study successfully obtained adenovirus carrying p75shRNA. The obtained viruses were named Ad.shRNA1, Ad.shRNA2, and Ad.shRNA3. The recombinant adenoviruses were separately used to infect cultured pheochromocytoma cells (PC12). Forty-eight hours later, p75NTR mRNA and total protein were analyzed from the PC12 cells. Compared with the negative controls, RNA interference rates were separately 98.49 ± 0.68%, 95.08 ± 1.79% and 96.60 ± 1.14% at the mRNA level, and 72.89 ± 2.17%, 58.83 ± 1.15% and 59.88 ± 0.44% at the protein level in the Ad.shRNA1, Ad.shRNA2, and Ad.shRNA3 groups, respectively. Thus, recombinant adenovirus shRNA-mediated gene silencing successfully suppressed p75NTR expression. 展开更多
关键词 p75 neurotrophin receptor rna interference ADENOVIRUS rat pheochromocytoma cells human embryonic kidney 293 cells APOPTOSIS cauda equina syndrome
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长链非编码RNA通过p38MAPK信号通路直接或间接影响骨质疏松症 被引量:1
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作者 覃浩 亢腾 刘钢 《中国组织工程研究》 CAS 北大核心 2025年第1期175-184,共10页
背景:近年来大量的研究发现长链非编码RNA参与骨质疏松症的发生和发展。p38MAPK信号通路参与骨髓间充质干细胞、成骨细胞以及破骨细胞的分化等过程而参与骨质疏松症的发展,而长链非编码RNA可通过影响p38MAPK信号通路,直接或间接参与骨... 背景:近年来大量的研究发现长链非编码RNA参与骨质疏松症的发生和发展。p38MAPK信号通路参与骨髓间充质干细胞、成骨细胞以及破骨细胞的分化等过程而参与骨质疏松症的发展,而长链非编码RNA可通过影响p38MAPK信号通路,直接或间接参与骨质疏松症的发生及发展过程。目的:综述长链非编码RNA通过p38MAPK信号通路,直接或间接影响骨质疏松症的进展,为长链非编码RNA在骨质疏松症中预防和治疗提供一个新思路。方法:检索PubMed、中国知网和万方数据库的相关文献,以“长链非编码RNA,骨质疏松,间充质干细胞,成骨细胞,破骨细胞,p38信号通路”为中文检索词,以“long non-coding RNA,osteoporosis,mesenchymal stem cells,osteoblasts,osteoclast,p38 signaling pathway”为英文检索词,排除陈旧、重复以及可信度低的观点,将检索到的文献进行归纳、总结和分析,选取76篇具有代表性的文章。结果与结论:(1)长链非编码RNA通过多种途径参与骨质疏松症的防治,包括促进骨髓间充质干细胞的成骨分化、促进成骨细胞分化和成骨细胞分泌活性、抑制破骨细胞增殖和对骨的吸收作用,以及调节成骨相关细胞通路的激活或抑制,激活p38MAPK信号通路延缓骨质疏松症进展,抑制该信号通路抑制破骨细胞的吸收作用,从而影响骨质疏松的发生和发展。(2)相应长链非编码RNA的过表达或低表达会通过p38MAPK信号通路来影响成骨细胞和破骨细胞的增殖或分化,调节骨重塑过程,进而影响骨质疏松症的发生和发展。大量的基础研究结果显示,长链非编码RNA和p38MAPK信号通路或许可以成为骨质疏松症治疗中的潜在应用和临床转化价值;且相应的长链非编码RNA过表达或低表达慢病毒、转染质粒,相应的p38MAPK信号通路抑制剂等在体外细胞实验及动物模型中都被证实有靶向调控作用。(3)因此,通过靶向调控长链非编码RNA和p38MAPK信号通路来调节骨髓间充质干细胞的分化和功能,或通过长链非编码RNA和p38MAPK信号通路来抑制破骨细胞的增殖分化,或许能提供一种创新的治疗策略,可以延缓骨质疏松症的进展。 展开更多
关键词 长链非编码rna P38MAPK
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