Actin is a ubiquitous protein and plays essential roles on cellular structure maintenance and cellular motility in both muscle and non-muscle tissues.Multiple genes encoding muscle actin have been identified from the ...Actin is a ubiquitous protein and plays essential roles on cellular structure maintenance and cellular motility in both muscle and non-muscle tissues.Multiple genes encoding muscle actin have been identified from the ascidians,including those expressed in the larval tail muscle,the adult body-wall muscle,and adult heart muscle.In this study,a novel striated non-tail muscle actin gene was identified from the RNA-seq data of Ciona savignyi embryos.Phylogenetic analysis,alignment of the N-terminal amino acid sequences and comparation of diagnostic residues provided evidence that it had high similarity with vertebrate cardiac and skeletal muscle actin.In situ hybridization and promoter-driven GFP reporter assay revealed that it was specifically expressed in the primordia of the oral and atrial siphon.We hereby defined it as siphon-specific muscle actin coding gene(Cs-SMA).A 201 bp(−1350 bp to−1150 bp)sequence containing T-box and Six1/2 binding motif within the upstream region of Cs-SMA confined the expression of GFP in the siphons of electroporated embryos.Six1/2 binding motif was experimentally confirmed to play indispensable role in controlling the siphon-specific expression of Cs-SMA.The tissue-specific expression of Cs-SMA in the siphon primordia indicated its potential crucial roles in Ciona embryogenesis and organogenesis.展开更多
[目的]检测EB病毒(EBV)阳性肺癌组织中EBV潜伏感染膜蛋白-1(LMP-1)、p53、Bcl-2及基质金属蛋白酶-9(MMP-9)表达情况,分析它们与肺癌发生发展的关系。[方法]采用原位杂交法检测108例肺癌组织和22例癌旁正常肺组织中EBV编码的小RNA-1(EBV ...[目的]检测EB病毒(EBV)阳性肺癌组织中EBV潜伏感染膜蛋白-1(LMP-1)、p53、Bcl-2及基质金属蛋白酶-9(MMP-9)表达情况,分析它们与肺癌发生发展的关系。[方法]采用原位杂交法检测108例肺癌组织和22例癌旁正常肺组织中EBV编码的小RNA-1(EBV encoded small RNA-1,EBER-1)。免疫组织化学的方法检测EBER-1阳性和阴性肺癌组织中LMP-1、p53、Bcl-2及MMP-9的表达。[结果]108例肺癌组织中EBER-1阳性36例,阳性率33.3%;22例癌旁正常肺组织中EBER-1阳性1例,阳性率4.5%,差异有统计学意义(P<0.01)。EBER-1阳性和阴性的肺癌组织中LMP-1阳性率分别为11.1%和4.2%,差异无统计学意义(P>0.05);在EBER-1阳性肺癌组织中p53、Bcl-2的平均面积(AA)和积分光密度(IOD)均高于阴性组,差异有统计学意义。在EBER-1阳性肺癌组织中MMP-9AA和IOD均高于阴性组,但差异无统计学意义(P>0.05)。[结论]EBV感染可能通过影响LMP-1、Bcl-2、p53和MMP-9在肺癌组织中的表达,进而在肺癌的发生、发展和转移中发挥作用。展开更多
基金funded by the National Key Research and Development Program of China(Nos.2019YFE0190900,2018YFD0900705).
文摘Actin is a ubiquitous protein and plays essential roles on cellular structure maintenance and cellular motility in both muscle and non-muscle tissues.Multiple genes encoding muscle actin have been identified from the ascidians,including those expressed in the larval tail muscle,the adult body-wall muscle,and adult heart muscle.In this study,a novel striated non-tail muscle actin gene was identified from the RNA-seq data of Ciona savignyi embryos.Phylogenetic analysis,alignment of the N-terminal amino acid sequences and comparation of diagnostic residues provided evidence that it had high similarity with vertebrate cardiac and skeletal muscle actin.In situ hybridization and promoter-driven GFP reporter assay revealed that it was specifically expressed in the primordia of the oral and atrial siphon.We hereby defined it as siphon-specific muscle actin coding gene(Cs-SMA).A 201 bp(−1350 bp to−1150 bp)sequence containing T-box and Six1/2 binding motif within the upstream region of Cs-SMA confined the expression of GFP in the siphons of electroporated embryos.Six1/2 binding motif was experimentally confirmed to play indispensable role in controlling the siphon-specific expression of Cs-SMA.The tissue-specific expression of Cs-SMA in the siphon primordia indicated its potential crucial roles in Ciona embryogenesis and organogenesis.
文摘[目的]检测EB病毒(EBV)阳性肺癌组织中EBV潜伏感染膜蛋白-1(LMP-1)、p53、Bcl-2及基质金属蛋白酶-9(MMP-9)表达情况,分析它们与肺癌发生发展的关系。[方法]采用原位杂交法检测108例肺癌组织和22例癌旁正常肺组织中EBV编码的小RNA-1(EBV encoded small RNA-1,EBER-1)。免疫组织化学的方法检测EBER-1阳性和阴性肺癌组织中LMP-1、p53、Bcl-2及MMP-9的表达。[结果]108例肺癌组织中EBER-1阳性36例,阳性率33.3%;22例癌旁正常肺组织中EBER-1阳性1例,阳性率4.5%,差异有统计学意义(P<0.01)。EBER-1阳性和阴性的肺癌组织中LMP-1阳性率分别为11.1%和4.2%,差异无统计学意义(P>0.05);在EBER-1阳性肺癌组织中p53、Bcl-2的平均面积(AA)和积分光密度(IOD)均高于阴性组,差异有统计学意义。在EBER-1阳性肺癌组织中MMP-9AA和IOD均高于阴性组,但差异无统计学意义(P>0.05)。[结论]EBV感染可能通过影响LMP-1、Bcl-2、p53和MMP-9在肺癌组织中的表达,进而在肺癌的发生、发展和转移中发挥作用。
