目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组...目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组,同时纳入30例健康志愿者作为对照组.按照肝癌的严重程度将观察组分成Ⅰ期、Ⅱ期和Ⅲ期.采用RT-PCR检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组IMP3的mRNA转录量,使用ELISA检测方法检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组患者血清IMP3浓度.结果:Ⅰ期组IMP3 mRNA转录量显著高于对照组(t=19.72,P=0.000),Ⅱ期组IMP3mRNA转录量显著高于Ⅰ期组(t=9.67,P=0.000),Ⅲ期组I M P3 m R N A转录量显著高于Ⅱ期组(t=23.34,P=0.000).观察组血清IMP3平均浓度为134.25 ng/mL±19.33 ng/mL,显著高于对照组(9.37 ng/mL±1.23 ng/mL)(t=70.22,P=0.000).Ⅰ期组血清IMP3平均浓度为48.35 ng/mL±12.03 ng/mL,显著高于对照组(t=19.84,P=0.000).Ⅱ期组血清IMP3平均浓度为95.36 ng/mL±9.25 ng/mL,显著高于Ⅰ期组(t=19.67,P=0.000).Ⅲ期组血清IMP3平均浓度为214.23 ng/mL±23.64 ng/mL,显著高于Ⅱ期组(t=28.83,P=0.000).结论:随着肝癌的进展血清IMP3浓度显著上升,血清IMP3检测具有肝癌早期诊断和肝癌进展评价的潜在价值.展开更多
Spliceosomal RNAs are a family of small nuclear RNAs(snRNAs)that are essential for pre-mRNA splicing.All vertebrate spliceosomal snRNAs are extensively pseudouridylated after transcription.Pseudouridines in spliceosom...Spliceosomal RNAs are a family of small nuclear RNAs(snRNAs)that are essential for pre-mRNA splicing.All vertebrate spliceosomal snRNAs are extensively pseudouridylated after transcription.Pseudouridines in spliceosomal snRNAs are generally clustered in regions that are functionally important during splicing.Many of these modified nucleotides are conserved across species lines.Recent studies have demonstrated that spliceosomal snRNA pseudouridylation is catalyzed by two different mechanisms:an RNA-dependent mechanism and an RNA-independent mechanism.The functions of the pseudouridines in spliceosomal snRNAs(U2 snRNA in particular)have also been extensively studied.Experimental data indicate that virtually all pseudouridines in U2 snRNA are functionally important.Besides the currently known pseudouridines(constitutive modifications),recent work has also indicated that pseudouridylation can be induced at novel positions under stress conditions,thus strongly suggesting that pseudouridylation is also a regulatory modification.展开更多
文摘目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组,同时纳入30例健康志愿者作为对照组.按照肝癌的严重程度将观察组分成Ⅰ期、Ⅱ期和Ⅲ期.采用RT-PCR检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组IMP3的mRNA转录量,使用ELISA检测方法检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组患者血清IMP3浓度.结果:Ⅰ期组IMP3 mRNA转录量显著高于对照组(t=19.72,P=0.000),Ⅱ期组IMP3mRNA转录量显著高于Ⅰ期组(t=9.67,P=0.000),Ⅲ期组I M P3 m R N A转录量显著高于Ⅱ期组(t=23.34,P=0.000).观察组血清IMP3平均浓度为134.25 ng/mL±19.33 ng/mL,显著高于对照组(9.37 ng/mL±1.23 ng/mL)(t=70.22,P=0.000).Ⅰ期组血清IMP3平均浓度为48.35 ng/mL±12.03 ng/mL,显著高于对照组(t=19.84,P=0.000).Ⅱ期组血清IMP3平均浓度为95.36 ng/mL±9.25 ng/mL,显著高于Ⅰ期组(t=19.67,P=0.000).Ⅲ期组血清IMP3平均浓度为214.23 ng/mL±23.64 ng/mL,显著高于Ⅱ期组(t=28.83,P=0.000).结论:随着肝癌的进展血清IMP3浓度显著上升,血清IMP3检测具有肝癌早期诊断和肝癌进展评价的潜在价值.
文摘Spliceosomal RNAs are a family of small nuclear RNAs(snRNAs)that are essential for pre-mRNA splicing.All vertebrate spliceosomal snRNAs are extensively pseudouridylated after transcription.Pseudouridines in spliceosomal snRNAs are generally clustered in regions that are functionally important during splicing.Many of these modified nucleotides are conserved across species lines.Recent studies have demonstrated that spliceosomal snRNA pseudouridylation is catalyzed by two different mechanisms:an RNA-dependent mechanism and an RNA-independent mechanism.The functions of the pseudouridines in spliceosomal snRNAs(U2 snRNA in particular)have also been extensively studied.Experimental data indicate that virtually all pseudouridines in U2 snRNA are functionally important.Besides the currently known pseudouridines(constitutive modifications),recent work has also indicated that pseudouridylation can be induced at novel positions under stress conditions,thus strongly suggesting that pseudouridylation is also a regulatory modification.