The highbush blueberry（Vaccinium corymbosum）,Duke,was used to construct a de novo transcriptome sequence library and to perform data statistical analysis.Mega 4,CLC Sequence Viewer 6 software,and quantitative PCR we...The highbush blueberry（Vaccinium corymbosum）,Duke,was used to construct a de novo transcriptome sequence library and to perform data statistical analysis.Mega 4,CLC Sequence Viewer 6 software,and quantitative PCR were employed for bioinformatics and expression analyses of the basic helix-loop-helix（BHLH）transcription factors of the sequencing library.The results showed that 28.38 gigabytes of valid data were obtained from transcriptome sequencing and were assembled into 108 033 unigenes.Functional annotation showed that 32 244 unigenes were annotated into Clusters of Orthologous Groups（COG）and Gene Ontology（GO）databases,whereas the rest of the 75 789 unigenes had no matching information.By using COG and GO classification tools,sequences with annotation information were divided into 25 and 52 categories,respectively,which involved transport and metabolism,transcriptional regulation,and signal transduction.Analysis of the transcriptome library identified a total of 59 BHLH genes.Sequence analysis revealed that 55 genes of that contained a complete BHLH domain.Furthermore,phylogenetic analysis showed that BHLH genes of blueberry（Duke）could be divided into 13 sub-groups.PCR results showed that 45 genes were expressed at various developmental stages of buds,stems,leaves,flowers,and fruits,suggesting that the function of BHLH was associated with the development of different tissues and organs of blueberry,Duke.The present study would provided a foundation for further investigations on the classification and functions of the blueberry BHLH family.展开更多
Oligodencrocytes（OLs） are the main glial cells of the central nervous system involved in myelination of axons. In multiple sclerosis（MS）, there is an imbalance between demyelination and remyelination processes, th...Oligodencrocytes（OLs） are the main glial cells of the central nervous system involved in myelination of axons. In multiple sclerosis（MS）, there is an imbalance between demyelination and remyelination processes, the last one performed by oligodendrocyte progenitor cells（OPCs） and OLs, resulting into a permanent demyelination, axonal damage and neuronal loss. In MS lesions, astrocytes and microglias play an important part in permeabilization of blood-brain barrier and initiation of OPCs proliferation. Migration and differentiation of OPCs are influenced by various factors and the process is finalized by insufficient acummulation of OLs into the MS lesion. In relation to all these processes, the author will discuss the potential targets for remyelination strategies.展开更多
Pod shattering is an agronomical trait that is a result of the coordinated action of cell differentiation and separation. In Arabidopsis, pod shattering is controlled by a complex genetic network in which ALCATRAZ （...Pod shattering is an agronomical trait that is a result of the coordinated action of cell differentiation and separation. In Arabidopsis, pod shattering is controlled by a complex genetic network in which ALCATRAZ （ALC）, a member of the basic helix-loop-helix family, is critical for cell separation during fruit dehiscence. Herein, we report the identification of ALC-INTERACTING PROTEIN1 （ACI1） via the yeast two-hybrid screen. ACll encodes a nuclear protein with a lysine-rich domain and a C-terminal serine-rich domain. ACI1 is mainly expressed in the vascular system throughout the plant and mesocarp of the valve in siliques. Our data showed that ACI1 interacts strongly with the N-terminal portion of ALC in yeast cells and in plant cells in the nucleus as demonstrated by bimolecular fluorescence complementaUon assay. Both ACI1 and ALC share an overlapping expression pattern, suggesting that they likely function together in planta. However, no detectable phenotype was found in plants with reduced ACll expression by RNA interference technology, suggesting that ACll may be redundant. Taken together, these data indicate that ALC may interact with ACI1 and its homologs to control cell separation during fruit dehiscence in Arabidopsis.展开更多
目的探讨miR-1271对卵巢癌细胞的增殖、侵袭和迁移的影响,及其作用机制。方法实验分为miR-NC组(转染miR-NC)、miR-1271组(转染miR-1271 mimics)、miR-1271+pcDNA3.1组(共转染miR-1271和pcDNA3.1)、miR-1271+pcDNA3.1-Twist1组(共转染miR...目的探讨miR-1271对卵巢癌细胞的增殖、侵袭和迁移的影响,及其作用机制。方法实验分为miR-NC组(转染miR-NC)、miR-1271组(转染miR-1271 mimics)、miR-1271+pcDNA3.1组(共转染miR-1271和pcDNA3.1)、miR-1271+pcDNA3.1-Twist1组(共转染miR-1271和pcDNA3.1-Twist1)。用噻唑蓝法检测细胞活性,用Transwell检测细胞迁移和侵袭情况,用实时定量聚合酶链反应检测miR-1271和碱性螺旋-环-螺旋转录因子1(Twist1)mRNA的表达水平,用荧光素酶报告基因检测实验检测miR-1271对Twist1的靶向调控。结果干预24 h后,miR-NC组、miR-1271组、miR-1271+pcDNA3.1组和miR-1271+pcDNA3.1-Twist1组的细胞活性分别为0.71±0.07,0.46±0.04,0.42±0.04和0.57±0.05,迁移细胞数分别为(129.00±9.69),(68.00±3.26),(67.00±3.18)和(98.00±6.85)个,侵袭细胞数分别为(110.00±8.16),(53.00±2.91),(55.00±2.96)和(83.00±4.39)个,miR-1271表达水平分别为0.18±0.02,0.47±0.04,0.46±0.06和0.49±0.01,Twist1 mRNA表达水平分别为0.68±0.06,0.13±0.01,0.11±0.01和0.47±0.03。miR-1271组和miR-1271+pcDNA3.1-Twist1组的细胞活性、迁移和侵袭细胞数、miR-1271和Twist1 mRNA表达水平分别与miR-NC组和miR-1271+pcDNA3.1组比较,差异均有统计学意义(均P<0.05)。转染WT-Twist1后,相较于miR-NC组,miR-1271组的荧光素酶活性显著降低(0.63±0.06 vs 1.12±0.10,P<0.05);而转染MUT-Twist1后,相较于miR-con组,miR-1271组的荧光素酶活性无显著变化(1.09±0.10 vs 1.11±0.10,P>0.05)。结论miR-1271可抑制卵巢癌细胞的增殖、迁移和侵袭,其机制可能与Twist1有关。展开更多
基金supported by the National Natural Science Foundation of China (31301754)the Chinese Academy of Agricultural Sciences-Agricultural Science and Technology Innovation Program (CAAS-ASTIP)the Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province, China (2015059)
文摘The highbush blueberry（Vaccinium corymbosum）,Duke,was used to construct a de novo transcriptome sequence library and to perform data statistical analysis.Mega 4,CLC Sequence Viewer 6 software,and quantitative PCR were employed for bioinformatics and expression analyses of the basic helix-loop-helix（BHLH）transcription factors of the sequencing library.The results showed that 28.38 gigabytes of valid data were obtained from transcriptome sequencing and were assembled into 108 033 unigenes.Functional annotation showed that 32 244 unigenes were annotated into Clusters of Orthologous Groups（COG）and Gene Ontology（GO）databases,whereas the rest of the 75 789 unigenes had no matching information.By using COG and GO classification tools,sequences with annotation information were divided into 25 and 52 categories,respectively,which involved transport and metabolism,transcriptional regulation,and signal transduction.Analysis of the transcriptome library identified a total of 59 BHLH genes.Sequence analysis revealed that 55 genes of that contained a complete BHLH domain.Furthermore,phylogenetic analysis showed that BHLH genes of blueberry（Duke）could be divided into 13 sub-groups.PCR results showed that 45 genes were expressed at various developmental stages of buds,stems,leaves,flowers,and fruits,suggesting that the function of BHLH was associated with the development of different tissues and organs of blueberry,Duke.The present study would provided a foundation for further investigations on the classification and functions of the blueberry BHLH family.
文摘Oligodencrocytes（OLs） are the main glial cells of the central nervous system involved in myelination of axons. In multiple sclerosis（MS）, there is an imbalance between demyelination and remyelination processes, the last one performed by oligodendrocyte progenitor cells（OPCs） and OLs, resulting into a permanent demyelination, axonal damage and neuronal loss. In MS lesions, astrocytes and microglias play an important part in permeabilization of blood-brain barrier and initiation of OPCs proliferation. Migration and differentiation of OPCs are influenced by various factors and the process is finalized by insufficient acummulation of OLs into the MS lesion. In relation to all these processes, the author will discuss the potential targets for remyelination strategies.
基金a Grant from the Ministry of Science and Technology of Chinato W.C. Yang (JY03-A-24)
文摘Pod shattering is an agronomical trait that is a result of the coordinated action of cell differentiation and separation. In Arabidopsis, pod shattering is controlled by a complex genetic network in which ALCATRAZ （ALC）, a member of the basic helix-loop-helix family, is critical for cell separation during fruit dehiscence. Herein, we report the identification of ALC-INTERACTING PROTEIN1 （ACI1） via the yeast two-hybrid screen. ACll encodes a nuclear protein with a lysine-rich domain and a C-terminal serine-rich domain. ACI1 is mainly expressed in the vascular system throughout the plant and mesocarp of the valve in siliques. Our data showed that ACI1 interacts strongly with the N-terminal portion of ALC in yeast cells and in plant cells in the nucleus as demonstrated by bimolecular fluorescence complementaUon assay. Both ACI1 and ALC share an overlapping expression pattern, suggesting that they likely function together in planta. However, no detectable phenotype was found in plants with reduced ACll expression by RNA interference technology, suggesting that ACll may be redundant. Taken together, these data indicate that ALC may interact with ACI1 and its homologs to control cell separation during fruit dehiscence in Arabidopsis.
文摘目的探讨miR-1271对卵巢癌细胞的增殖、侵袭和迁移的影响,及其作用机制。方法实验分为miR-NC组(转染miR-NC)、miR-1271组(转染miR-1271 mimics)、miR-1271+pcDNA3.1组(共转染miR-1271和pcDNA3.1)、miR-1271+pcDNA3.1-Twist1组(共转染miR-1271和pcDNA3.1-Twist1)。用噻唑蓝法检测细胞活性,用Transwell检测细胞迁移和侵袭情况,用实时定量聚合酶链反应检测miR-1271和碱性螺旋-环-螺旋转录因子1(Twist1)mRNA的表达水平,用荧光素酶报告基因检测实验检测miR-1271对Twist1的靶向调控。结果干预24 h后,miR-NC组、miR-1271组、miR-1271+pcDNA3.1组和miR-1271+pcDNA3.1-Twist1组的细胞活性分别为0.71±0.07,0.46±0.04,0.42±0.04和0.57±0.05,迁移细胞数分别为(129.00±9.69),(68.00±3.26),(67.00±3.18)和(98.00±6.85)个,侵袭细胞数分别为(110.00±8.16),(53.00±2.91),(55.00±2.96)和(83.00±4.39)个,miR-1271表达水平分别为0.18±0.02,0.47±0.04,0.46±0.06和0.49±0.01,Twist1 mRNA表达水平分别为0.68±0.06,0.13±0.01,0.11±0.01和0.47±0.03。miR-1271组和miR-1271+pcDNA3.1-Twist1组的细胞活性、迁移和侵袭细胞数、miR-1271和Twist1 mRNA表达水平分别与miR-NC组和miR-1271+pcDNA3.1组比较,差异均有统计学意义(均P<0.05)。转染WT-Twist1后,相较于miR-NC组,miR-1271组的荧光素酶活性显著降低(0.63±0.06 vs 1.12±0.10,P<0.05);而转染MUT-Twist1后,相较于miR-con组,miR-1271组的荧光素酶活性无显著变化(1.09±0.10 vs 1.11±0.10,P>0.05)。结论miR-1271可抑制卵巢癌细胞的增殖、迁移和侵袭,其机制可能与Twist1有关。
