盐害是影响紫花苜蓿生产力的主要非生物因素之一,鉴定控制这一复杂性状的基因将为苜蓿育种计划提供关键信息。为揭示紫花苜蓿在盐胁迫下基因表达谱的变化,以紫花苜蓿Millennium为材料,对正常培养(WT_CK1)和盐胁迫(WT_N1)条件下的2个样...盐害是影响紫花苜蓿生产力的主要非生物因素之一,鉴定控制这一复杂性状的基因将为苜蓿育种计划提供关键信息。为揭示紫花苜蓿在盐胁迫下基因表达谱的变化,以紫花苜蓿Millennium为材料,对正常培养(WT_CK1)和盐胁迫(WT_N1)条件下的2个样品根系进行转录组分析,同时利用实时荧光定量PCR(qRT-PCR)技术对部分关键基因的表达特点进行验证。结果表明,紫花苜蓿根系在250 m M Na Cl胁迫72 h时,共检测到31 907个基因表达量发生了改变,2 758个基因的表达量差异达到2倍以上,包括199个转录因子,其中1 338个表达量上调,1 420个表达量下调,这些差异表达基因功能主要涉及次生代谢、代谢途径、激素代谢及信号转导和植物病原菌互作等。qRT-PCR分析表明,6个随机选择的基因在胁迫前后的表达特点与表达谱测序结果一致。综上,紫花苜蓿根系对盐胁迫响应是一个多基因参与、多个生物代谢过程反应协同调控的过程,基因表达量的变化可能是调控的主要方式。此外,本研究候选了一系列胆汁酸:Na+共转运蛋白、晚期胚胎发生富集蛋白、谷胱甘肽-s-转移酶基因和转录因子等与紫花苜蓿盐胁迫相关的应答关键基因,为揭示紫花苜蓿耐盐分子机制奠定了基础。展开更多
In recent years,a large number of differentially expressed genes have been identified in human umbilical cord mesenchymal stem cell(hUMSC)transplants for the treatment of ischemic cerebral infarction.These genes are i...In recent years,a large number of differentially expressed genes have been identified in human umbilical cord mesenchymal stem cell(hUMSC)transplants for the treatment of ischemic cerebral infarction.These genes are involved in various biochemical processes,but the role of microRNAs(miRNAs)in this process is still unclear.From the Gene Expression Omnibus(GEO)database,we downloaded two microarray datasets for GSE78731(messenger RNA(mRNA)profile)and GSE97532(miRNA profile).The differentially expressed genes screened were compared between the hUMSC group and the middle cerebral artery occlusion group.Gene ontology enrichment and pathway enrichment analyses were subsequently conducted using the online Database for Annotation,Visualization,and Integrated Discovery.Identified genes were applied to perform weighted gene co-suppression analyses,to establish a weighted co-expression network model.Furthermore,the protein-protein interaction network for differentially expressed genes from turquoise modules was built using Cytoscape(version 3.40)and the most highly correlated subnetwork was extracted from the protein-protein interaction network using the MCODE plugin.The predicted target genes for differentially expressed miRNAs were also identified using the online database starBase v3.0.A total of 3698 differentially expressed genes were identified.Gene ontology analysis demonstrated that differentially expressed genes that are related to hUMSC treatment of ischemic cerebral infarction are involved in endocytosis and inflammatory responses.We identified 12 differentially expressed miRNAs in middle cerebral artery occlusion rats after hUMSC treatment,and these differentially expressed miRNAs were mainly involved in signaling in inflammatory pathways,such as in the regulation of neutrophil migration.In conclusion,we have identified a number of differentially expressed genes and differentially expressed mRNAs,miRNA-mRNAs,and signaling pathways involved in the hUMSC treatment of ischemic cerebral infarction.Bioinformatics and 展开更多
【目的】研究福清山羊与努比亚黑山羊背最长肌组织转录组差异表达水平,为地方山羊品种肉质、生长性状的遗传机制和遗传改良提供理论基础。【方法】分别测定周岁内羯羊育肥的福清山羊与努比亚黑山羊日增重(ADG)以及2个品种周岁背最长肌...【目的】研究福清山羊与努比亚黑山羊背最长肌组织转录组差异表达水平,为地方山羊品种肉质、生长性状的遗传机制和遗传改良提供理论基础。【方法】分别测定周岁内羯羊育肥的福清山羊与努比亚黑山羊日增重(ADG)以及2个品种周岁背最长肌样品的肌内脂肪含量(inter-muscular fat,IMF);同时利用转录组测序方法对2个品种周岁背最长肌组织进行高通量测序,筛选品种间的差异表达基因(differentially expressed genes,DEGs),并对DEGs功能进行注释和测序结果的荧光定量PCR(quantitative real-time PCR,qRT-PCR)验证。【结果】在羯羊育肥条件下,福清山羊周岁内ADG为65.6g·d-1,极显著低于努比亚黑山羊的127.4g·d-1(Sig.=0.000);而福清山羊周岁背最长肌IMF含量为3.69%,极显著高于努比亚黑山羊的1.83%(Sig.=0.003)。2个品种6个样品的背最长肌转录组测序共得到44.76Gb Clean Data,各样品的Clean reads与参考基因组(山羊)的比对效率在84.65%-86.17%之间。DESeq分析发现了努比亚黑山羊和福清山羊背最长肌的DEGs 608个,其中上调基因61个,下调基因547个。608个DEGs中的518个基因能够被GO(gene ontology)数据库注释,148个DEGs能够被COG(Cluster of Orthologous Groups of proteins)数据库注释,418个DEGs能够被KEGG(kyoto encyclopedia of genes and genomes)数据库注释。KEGG通路分析表明DEGs共富集到222条信号通路中,44条通路显著富集。经过文献检索和对筛选通路相关基因功能的分析,初步判断可能与羊肉质和生长性状相关的通路包括肌动蛋白细胞骨架调节(Regulation of actin cytoskeleton)、Jak-STAT信号转导通路{Janus kinase/signal transducer and activator of transcription(Jak-STAT)signaling pathway}、MAPK信号转导信号通路{mitogen-activated protein kinase(MAPK)signaling pathway}和Ⅰ型糖尿病通路(TypeⅠdiabetes mellitus);IGF1(Insulin-like growth factor 1,类胰岛素一号增长因子)、ACSL5(Long-chain fatty acyl-CoA 展开更多
文摘盐害是影响紫花苜蓿生产力的主要非生物因素之一,鉴定控制这一复杂性状的基因将为苜蓿育种计划提供关键信息。为揭示紫花苜蓿在盐胁迫下基因表达谱的变化,以紫花苜蓿Millennium为材料,对正常培养(WT_CK1)和盐胁迫(WT_N1)条件下的2个样品根系进行转录组分析,同时利用实时荧光定量PCR(qRT-PCR)技术对部分关键基因的表达特点进行验证。结果表明,紫花苜蓿根系在250 m M Na Cl胁迫72 h时,共检测到31 907个基因表达量发生了改变,2 758个基因的表达量差异达到2倍以上,包括199个转录因子,其中1 338个表达量上调,1 420个表达量下调,这些差异表达基因功能主要涉及次生代谢、代谢途径、激素代谢及信号转导和植物病原菌互作等。qRT-PCR分析表明,6个随机选择的基因在胁迫前后的表达特点与表达谱测序结果一致。综上,紫花苜蓿根系对盐胁迫响应是一个多基因参与、多个生物代谢过程反应协同调控的过程,基因表达量的变化可能是调控的主要方式。此外,本研究候选了一系列胆汁酸:Na+共转运蛋白、晚期胚胎发生富集蛋白、谷胱甘肽-s-转移酶基因和转录因子等与紫花苜蓿盐胁迫相关的应答关键基因,为揭示紫花苜蓿耐盐分子机制奠定了基础。
基金supported by the National Key Research&Development Program of China,No.2016YFC1301600Program for Jilin University Science and Technology Innovation Team,No.2017TD-12(both to YY)
文摘In recent years,a large number of differentially expressed genes have been identified in human umbilical cord mesenchymal stem cell(hUMSC)transplants for the treatment of ischemic cerebral infarction.These genes are involved in various biochemical processes,but the role of microRNAs(miRNAs)in this process is still unclear.From the Gene Expression Omnibus(GEO)database,we downloaded two microarray datasets for GSE78731(messenger RNA(mRNA)profile)and GSE97532(miRNA profile).The differentially expressed genes screened were compared between the hUMSC group and the middle cerebral artery occlusion group.Gene ontology enrichment and pathway enrichment analyses were subsequently conducted using the online Database for Annotation,Visualization,and Integrated Discovery.Identified genes were applied to perform weighted gene co-suppression analyses,to establish a weighted co-expression network model.Furthermore,the protein-protein interaction network for differentially expressed genes from turquoise modules was built using Cytoscape(version 3.40)and the most highly correlated subnetwork was extracted from the protein-protein interaction network using the MCODE plugin.The predicted target genes for differentially expressed miRNAs were also identified using the online database starBase v3.0.A total of 3698 differentially expressed genes were identified.Gene ontology analysis demonstrated that differentially expressed genes that are related to hUMSC treatment of ischemic cerebral infarction are involved in endocytosis and inflammatory responses.We identified 12 differentially expressed miRNAs in middle cerebral artery occlusion rats after hUMSC treatment,and these differentially expressed miRNAs were mainly involved in signaling in inflammatory pathways,such as in the regulation of neutrophil migration.In conclusion,we have identified a number of differentially expressed genes and differentially expressed mRNAs,miRNA-mRNAs,and signaling pathways involved in the hUMSC treatment of ischemic cerebral infarction.Bioinformatics and
文摘【目的】研究福清山羊与努比亚黑山羊背最长肌组织转录组差异表达水平,为地方山羊品种肉质、生长性状的遗传机制和遗传改良提供理论基础。【方法】分别测定周岁内羯羊育肥的福清山羊与努比亚黑山羊日增重(ADG)以及2个品种周岁背最长肌样品的肌内脂肪含量(inter-muscular fat,IMF);同时利用转录组测序方法对2个品种周岁背最长肌组织进行高通量测序,筛选品种间的差异表达基因(differentially expressed genes,DEGs),并对DEGs功能进行注释和测序结果的荧光定量PCR(quantitative real-time PCR,qRT-PCR)验证。【结果】在羯羊育肥条件下,福清山羊周岁内ADG为65.6g·d-1,极显著低于努比亚黑山羊的127.4g·d-1(Sig.=0.000);而福清山羊周岁背最长肌IMF含量为3.69%,极显著高于努比亚黑山羊的1.83%(Sig.=0.003)。2个品种6个样品的背最长肌转录组测序共得到44.76Gb Clean Data,各样品的Clean reads与参考基因组(山羊)的比对效率在84.65%-86.17%之间。DESeq分析发现了努比亚黑山羊和福清山羊背最长肌的DEGs 608个,其中上调基因61个,下调基因547个。608个DEGs中的518个基因能够被GO(gene ontology)数据库注释,148个DEGs能够被COG(Cluster of Orthologous Groups of proteins)数据库注释,418个DEGs能够被KEGG(kyoto encyclopedia of genes and genomes)数据库注释。KEGG通路分析表明DEGs共富集到222条信号通路中,44条通路显著富集。经过文献检索和对筛选通路相关基因功能的分析,初步判断可能与羊肉质和生长性状相关的通路包括肌动蛋白细胞骨架调节(Regulation of actin cytoskeleton)、Jak-STAT信号转导通路{Janus kinase/signal transducer and activator of transcription(Jak-STAT)signaling pathway}、MAPK信号转导信号通路{mitogen-activated protein kinase(MAPK)signaling pathway}和Ⅰ型糖尿病通路(TypeⅠdiabetes mellitus);IGF1(Insulin-like growth factor 1,类胰岛素一号增长因子)、ACSL5(Long-chain fatty acyl-CoA
