Background Verticillium dahliae,a soil-borne fungi,can cause Verticillium wilt,and seriously diminish the yield and quality of cotton.However,the pathogenic mechanism of V.dahliae is complex and not clearly understood...Background Verticillium dahliae,a soil-borne fungi,can cause Verticillium wilt,and seriously diminish the yield and quality of cotton.However,the pathogenic mechanism of V.dahliae is complex and not clearly understood at the moment.This study aimed to identify the high-affinity nicotinic acid transporter genes in V.dahliae.The gene expression profiles in V.dahliae following sensing of root exudates from susceptible and resistant cotton varieties were analyzed.The function of VdNAT1 in the pathogenic process of V.dahliae was studied using the tobacco rattle virus(TRV)-based host-induced gene silencing(HIGS)technique.Results Eight high-affinity nicotinic acid transporter genes were identified from V.dahliae through the bioinformatics method.Each protein contains a conserved major facilitator superfamily(MFS)domain,which belongs to the MFS superfamily.Evolutionary relationship analysis revealed that all 8 genes belong to the anion:cation symporter(ACS)subfamily.All proteins have transmembrane domains,ranging from 7 to 12.The expression levels of most VdNAT genes were significantly increased after induction by root exudates from susceptible cotton varieties.Silencing VdNAT1 gene by HIGS significantly inhibited the accumulation of fungal biomass in cotton plants,and alleviated the disease symptoms of cotton.Conclusions Eight VdNAT genes were identified from V.dahliae,and most VdNAT genes was up-regulated after induced by root exudates from susceptible cotton variety.In addition,VdNAT1 is required for the pathogenicity of V.dahliae.Overall,these findings will facilitate the pathogenic molecular mechanism of V.dahliae and provide candidate genes.展开更多
Objective:Osteoarthritis(OA)and sarcopenia are significant health concerns in the elderly,substantially impacting their daily activities and quality of life.However,the relationship between them remains poorly underst...Objective:Osteoarthritis(OA)and sarcopenia are significant health concerns in the elderly,substantially impacting their daily activities and quality of life.However,the relationship between them remains poorly understood.This study aims to uncover common biomarkers and pathways associated with both OA and sarcopenia.Methods:Gene expression profiles related to OA and sarcopenia were retrieved from the Gene Expression Omnibus(GEO)database.Differentially expressed genes(DEGs)between disease and control groups were identified using R software.Common DEGs were extracted via Venn diagram analysis.Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses were conducted to identify biological processes and pathways associated with shared DEGs.Protein-protein interaction(PPI)networks were constructed,and candidate hub genes were ranked using the maximal clique centrality(MCC)algorithm.Further validation of hub gene expression was performed using 2 independent datasets.Receiver operating characteristic(ROC)curve analysis was used to evaluate the predictive value of key genes for OA and sarcopenia.Mouse models of OA and sarcopenia were established.Hematoxylin-eosin and Safranin O/Fast Green staining were used to validate the OA model.The sarcopenia model was validated via rotarod testing and quadriceps muscle mass measurement.Real-time reverse transcription PCR(real-time RT-PCR)was employed to assess the mRNA expression levels of candidate key genes in both models.Gene set enrichment analysis(GSEA)was conducted to identify pathways associated with the selected shared key genes in both diseases.Results:A total of 89 common DEGs were identified in the gene expression profiles of OA and sarcopenia,including 76 upregulated and 13 downregulated genes.These 89 DEGs were significantly enriched in protein digestion and absorption,the PI3K-Akt signaling pathway,and extracellular matrix-receptor interaction.PPI network analysis and MCC algorithm analysis of the 89 common DEGs identified the top 17 candidate hub genes.Based on the differential expression analysis of these 17 candidate hub genes in the validation datasets,AEBP1 and COL8A2 were ultimately selected as the common key genes for both diseases,both of which showed a significant upregulation trend in the disease groups(all P<0.05).The value of area under the curve(AUC)for AEBP1 and COL8A2 in the OA and sarcopenia datasets were all greater than 0.7,indicating that both genes have potential value in predicting OA and sarcopenia.Real-time RT-PCR results showed that the mRNA expression levels of AEBP1 and COL8A2 were significantly upregulated in the disease groups(all P<0.05),consistent with the results observed in the bioinformatics analysis.GSEA revealed that AEBP1 and COL8A2 were closely related to extracellular matrix-receptor interaction,ribosome,and oxidative phosphorylation in OA and sarcopenia.Conclusion:AEBP1 and COL8A2 have the potential to serve as common biomarkers for OA and sarcopenia.The extracellular matrix-receptor interaction pathway may represent a potential target for the prevention and treatment of both OA and sarcopenia.展开更多
Objective:Keratoconus(KC)is a progressive corneal ectasia disorder,arising from a myriad of causes including genetic predispositions,environmental factors,biomechanical influences,and inflammatory reactions.This study...Objective:Keratoconus(KC)is a progressive corneal ectasia disorder,arising from a myriad of causes including genetic predispositions,environmental factors,biomechanical influences,and inflammatory reactions.This study aims to identify potential pathogenetic gene mutations in patients with sporadic KC in the Han Chinese population.Methods:Twenty-five patients with primary KC as well as 50 unrelated population matched healthy controls,were included in this study to identify potential pathogenic gene mutations among sporadic KC patients in the Han Chinese population.Sanger sequencing and whole-exome sequencing(WES)were used to analyze mutations in the zinc finger protein 469(ZNF469)gene.Bioinformatics analysis was conducted to explore the potential role of ZNF469 in KC pathogenesis.Results:Five novel heterozygous missense variants were identified in KC patients.Among them,2 compound heterozygous variants,c.8986G>C(p.E2996Q)with c.11765A>C(p.D3922A),and c.4423C>G(p.L1475V)with c.10633G>A(p.G3545R),were determined to be possible pathogenic factors for KC.Conclusion:Mutations in the ZNF469 gene may contribute to the development of KC in the Han Chinese population.These mutation sites may provide valuable information for future genetic screening of KC patients and their families.展开更多
Objective To investigate the structural changes of rat thoracic aorta and changes in expression levels of Bmal1 and cyclins in thoracic aorta endothelial cells following heat stress.Methods Twenty male SD rats were ra...Objective To investigate the structural changes of rat thoracic aorta and changes in expression levels of Bmal1 and cyclins in thoracic aorta endothelial cells following heat stress.Methods Twenty male SD rats were randomized equally into control group and heat stress group.After exposure to 32℃for 2 weeks in the latter group,the rats were examined for histopathological changes and Bmal1 expression in the thoracic aorta using HE staining and immunohistochemistry.In the cell experiments,cultured rat thoracic aortic endothelial cells(RTAECs)were incubated at 40℃for 12 h with or without prior transfection with a Bmal1-specific small interfering RNA(si-Bmal1)or a negative sequence.In both rat thoracic aorta and RTAECs,the expressions of Bmal1,the cell cycle proteins CDK1,CDK4,CDK6,and cyclin B1,and apoptosis-related proteins Bax and Bcl-2 were detected using Western blotting.TUNEL staining was used to detect cell apoptosis in rat thoracic aorta,and the changes in cell cycle distribution and apoptosis in RTAECs were analyzed with flow cytometry.Results Compared with the control rats,the rats exposed to heat stress showed significantly increased blood pressures and lowered heart rate with elastic fiber disruption and increased expressions of Bmal1,cyclin B1 and CDK1 in the thoracic aorta(P<0.05).In cultured RTAECs,heat stress caused significant increase of Bmal1,cyclin B1 and CDK1 protein expression levels,which were obviously lowered in cells with prior si-Bmal1 transfection.Bmal1 knockdown also inhibited heat stress-induced increase of apoptosis in RTAECs as evidenced by decreased expression of Bax and increased expression of Bcl-2.Conclusion Heat stress upregulates Bmal1 expression and causes alterations in expressions of cyclins to trigger apoptosis of rat thoracic aorta endothelial cells,which can be partly alleviated by suppressing Bmal1 expression.展开更多
GPAT,AIRC and purH genes are involved in the de novo purine biosynthesis,and they all had significant effects on muscle inosine monophosphate(IMP) content in chickens.This study was designed to investigate the effects...GPAT,AIRC and purH genes are involved in the de novo purine biosynthesis,and they all had significant effects on muscle inosine monophosphate(IMP) content in chickens.This study was designed to investigate the effects of GPAT,AIRC and purH genes on muscle IMP content in a relatively large population of Baier chickens;single genotype effects as well as the combined genotype effects were analyzed.The results further support that GPAT,AIRC and purH genes had effects on muscle IMP content;they might be candidate loci or linked to major genes affecting muscle IMP content.The combined genotypic effects were significantly higher than those of the single genotypes and were even larger when more gene loci were combined.We tentatively conclude that combined genotypes are superior to single genotypes as potential molecular markers for meat quality traits in chicken.展开更多
The paper presented an implement method for a dynamic gene expression display software based on the GTK. This method established the dynamic presentation system of gene expression which according to gene expression da...The paper presented an implement method for a dynamic gene expression display software based on the GTK. This method established the dynamic presentation system of gene expression which according to gene expression data from gene chip hybridize at different time, adopted a linearity combination model and Pearson correlation coefficient algorithm. The system described the gene expression changes in graphic form, the gene expression changes with time and the changes in characteristics of the gene expression, also the changes in relations of the gene expression and regulation relationships among genes. The system also provided an integrated platform for analysis on gene chips data, especially for the research on the network ofgene regulation.展开更多
Genetic linkage relationship of the natural colored fiber and six fuzzless seed germplasms in obsolete backgrounds of Gossypium hirsutum(AD genome) and G.barbadense were analyzed in the
Background and Objective Marfan syndrome,a variable and heritable disorder of fibrous connective tissue,characterized by affecting skeletal,ocular and cardiovascular systems.With the research advancement of genetic me...Background and Objective Marfan syndrome,a variable and heritable disorder of fibrous connective tissue,characterized by affecting skeletal,ocular and cardiovascular systems.With the research advancement of genetic mechanism,the diagnosis of Marfan syndrome,based on clinical manifestations and genetic evidence,is more accurate.The aim of this study is identification of genetic pathogenesis in a Chinese family.展开更多
Previous study indicated that the thermo-sensitive genic malesterile(TGMS) gene in rice was regulated by temperature.TGMS rice plays an important role in hybrid rice production,because the application of the TGMS syst...Previous study indicated that the thermo-sensitive genic malesterile(TGMS) gene in rice was regulated by temperature.TGMS rice plays an important role in hybrid rice production,because the application of the TGMS system in two-line breeding is laborsaving,timesaving,simple,inexpensive,efficient,and eliminating the limitations of the cytoplasmic male sterility(CMS) system.'AnnongS' is the first discovered and deeply studied TGMS rice lines in China.'AnnongS-1' and 'Y58S',two derivatives of TGMS line AnnongS,were both controlled by a single recessive gene named tms5,which was genetically mapped on chromosome 2.In this study,three populations('AnnongS-1' × 'Nanjing11','Y58S' × 'Q611',and 'Y58S' × 'Guanghui122') were developed and used for the molecular fine mapping of the tms5 gene.By analyzing recombination events in the sterile individuals using a total of 125 probes covering the tms5 region,the tms5 gene was physically mapped to a 19-kb DNA fragment between two markers 4039-1 and 4039-2,which were located on the BAC clone AP004039.After the construction of the physical map between two markers 4039-1 and 4039-2,a member(ONAC023) of the NAC(NAM-ATAF-CUC-related) gene family was identified as the candidate gene of the tms5 gene.展开更多
ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a ...ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a kind of chemical-material-coated-glass slides. The total RNAs were isolated from the tissues. Both the mRNAs from the degeneration and normal lumbar intervertebral disc in humans were reversely transcribed to the cDNAs, which used as the hybridization probes with the incorporations of fluorescent dUTP. The mixed probes were then hybridized to the cDNA microarray. After high-stringent washing, the cDNA microarray was scanned for the fluorescent signals and analyzed with computer image analysis. ResultsAmong the 4096 targets, there were 706 genes whose expression levels differed between the degeneration and normal lumbar intervertebral disc in all cases, comprising 298 up-regulated and 358 down-regulated ones. ConclusionDNA microarray technology is an effective technique in screening for differently expressed genes between the degeneration and normal lumbar intervertebral disc. Cell apoptosis plays an important role in the process of lumbar intervertebral disc degeneration.展开更多
Methionine and lysine are restrictive essential amino acids of livestock, they are also the most attentive indexes in the feed production to carry out the quality control and quality evaluation. Their contents in feed...Methionine and lysine are restrictive essential amino acids of livestock, they are also the most attentive indexes in the feed production to carry out the quality control and quality evaluation. Their contents in feed directly affect livestock protein synthesis. Bacillus natto has excellent probiotic properties. In this experiment, we used the genetic engineering method, fusion PCR technique, to connect methionine-rich gene （zein） from maize endosperm protein with lysine-rich gene （Cflr） from the pepper anther, then the fusion gene was inserted into the expression vector pHT43, and the recombinant plasmid pHT43/zein-Cflr was constructed. The recombinant plasmid was transferred into Bacillus natto, and induced by IPTG for the expression of the fusion gene. We found an apparent band at 40 ku site for the recombinant strain by SDS-PAGE. The contents of methionine and lysine were individually detected with HPLC, the quantities of methionine and lysine in the recombinant strain increased by 18.37% and 24.68% than the wild one, respectively. We also verified the stability of the recombinant bacterium during passaging, and found the stability was 100%. This study provided research-basis for the application of the recombined Bacillus natto as feed additive.展开更多
Gene expression profiling at early stages(0～2 DPA) of fiber development in Gossypium hirsutum identified a number of transcription factors which were down regulated in fiberless mutants relative to wild type controls...Gene expression profiling at early stages(0～2 DPA) of fiber development in Gossypium hirsutum identified a number of transcription factors which were down regulated in fiberless mutants relative to wild type controls and which could play a role in controlling early fiber development.Chief among these was GhMYB25,a Mixta-like MYB gene.Transgenic GhMYB25-silenced cotton展开更多
基金supported by National Natural Science Foundation of China(No.32160615).
文摘Background Verticillium dahliae,a soil-borne fungi,can cause Verticillium wilt,and seriously diminish the yield and quality of cotton.However,the pathogenic mechanism of V.dahliae is complex and not clearly understood at the moment.This study aimed to identify the high-affinity nicotinic acid transporter genes in V.dahliae.The gene expression profiles in V.dahliae following sensing of root exudates from susceptible and resistant cotton varieties were analyzed.The function of VdNAT1 in the pathogenic process of V.dahliae was studied using the tobacco rattle virus(TRV)-based host-induced gene silencing(HIGS)technique.Results Eight high-affinity nicotinic acid transporter genes were identified from V.dahliae through the bioinformatics method.Each protein contains a conserved major facilitator superfamily(MFS)domain,which belongs to the MFS superfamily.Evolutionary relationship analysis revealed that all 8 genes belong to the anion:cation symporter(ACS)subfamily.All proteins have transmembrane domains,ranging from 7 to 12.The expression levels of most VdNAT genes were significantly increased after induction by root exudates from susceptible cotton varieties.Silencing VdNAT1 gene by HIGS significantly inhibited the accumulation of fungal biomass in cotton plants,and alleviated the disease symptoms of cotton.Conclusions Eight VdNAT genes were identified from V.dahliae,and most VdNAT genes was up-regulated after induced by root exudates from susceptible cotton variety.In addition,VdNAT1 is required for the pathogenicity of V.dahliae.Overall,these findings will facilitate the pathogenic molecular mechanism of V.dahliae and provide candidate genes.
基金supported by the National Natural Science Foundation of China(82060418).
文摘Objective:Osteoarthritis(OA)and sarcopenia are significant health concerns in the elderly,substantially impacting their daily activities and quality of life.However,the relationship between them remains poorly understood.This study aims to uncover common biomarkers and pathways associated with both OA and sarcopenia.Methods:Gene expression profiles related to OA and sarcopenia were retrieved from the Gene Expression Omnibus(GEO)database.Differentially expressed genes(DEGs)between disease and control groups were identified using R software.Common DEGs were extracted via Venn diagram analysis.Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses were conducted to identify biological processes and pathways associated with shared DEGs.Protein-protein interaction(PPI)networks were constructed,and candidate hub genes were ranked using the maximal clique centrality(MCC)algorithm.Further validation of hub gene expression was performed using 2 independent datasets.Receiver operating characteristic(ROC)curve analysis was used to evaluate the predictive value of key genes for OA and sarcopenia.Mouse models of OA and sarcopenia were established.Hematoxylin-eosin and Safranin O/Fast Green staining were used to validate the OA model.The sarcopenia model was validated via rotarod testing and quadriceps muscle mass measurement.Real-time reverse transcription PCR(real-time RT-PCR)was employed to assess the mRNA expression levels of candidate key genes in both models.Gene set enrichment analysis(GSEA)was conducted to identify pathways associated with the selected shared key genes in both diseases.Results:A total of 89 common DEGs were identified in the gene expression profiles of OA and sarcopenia,including 76 upregulated and 13 downregulated genes.These 89 DEGs were significantly enriched in protein digestion and absorption,the PI3K-Akt signaling pathway,and extracellular matrix-receptor interaction.PPI network analysis and MCC algorithm analysis of the 89 common DEGs identified the top 17 candidate hub genes.Based on the differential expression analysis of these 17 candidate hub genes in the validation datasets,AEBP1 and COL8A2 were ultimately selected as the common key genes for both diseases,both of which showed a significant upregulation trend in the disease groups(all P<0.05).The value of area under the curve(AUC)for AEBP1 and COL8A2 in the OA and sarcopenia datasets were all greater than 0.7,indicating that both genes have potential value in predicting OA and sarcopenia.Real-time RT-PCR results showed that the mRNA expression levels of AEBP1 and COL8A2 were significantly upregulated in the disease groups(all P<0.05),consistent with the results observed in the bioinformatics analysis.GSEA revealed that AEBP1 and COL8A2 were closely related to extracellular matrix-receptor interaction,ribosome,and oxidative phosphorylation in OA and sarcopenia.Conclusion:AEBP1 and COL8A2 have the potential to serve as common biomarkers for OA and sarcopenia.The extracellular matrix-receptor interaction pathway may represent a potential target for the prevention and treatment of both OA and sarcopenia.
基金supported by the National Natural Science Foundation(82271057)the Natural Science Foundation of Hunan Province(2023JJ30818),China。
文摘Objective:Keratoconus(KC)is a progressive corneal ectasia disorder,arising from a myriad of causes including genetic predispositions,environmental factors,biomechanical influences,and inflammatory reactions.This study aims to identify potential pathogenetic gene mutations in patients with sporadic KC in the Han Chinese population.Methods:Twenty-five patients with primary KC as well as 50 unrelated population matched healthy controls,were included in this study to identify potential pathogenic gene mutations among sporadic KC patients in the Han Chinese population.Sanger sequencing and whole-exome sequencing(WES)were used to analyze mutations in the zinc finger protein 469(ZNF469)gene.Bioinformatics analysis was conducted to explore the potential role of ZNF469 in KC pathogenesis.Results:Five novel heterozygous missense variants were identified in KC patients.Among them,2 compound heterozygous variants,c.8986G>C(p.E2996Q)with c.11765A>C(p.D3922A),and c.4423C>G(p.L1475V)with c.10633G>A(p.G3545R),were determined to be possible pathogenic factors for KC.Conclusion:Mutations in the ZNF469 gene may contribute to the development of KC in the Han Chinese population.These mutation sites may provide valuable information for future genetic screening of KC patients and their families.
文摘Objective To investigate the structural changes of rat thoracic aorta and changes in expression levels of Bmal1 and cyclins in thoracic aorta endothelial cells following heat stress.Methods Twenty male SD rats were randomized equally into control group and heat stress group.After exposure to 32℃for 2 weeks in the latter group,the rats were examined for histopathological changes and Bmal1 expression in the thoracic aorta using HE staining and immunohistochemistry.In the cell experiments,cultured rat thoracic aortic endothelial cells(RTAECs)were incubated at 40℃for 12 h with or without prior transfection with a Bmal1-specific small interfering RNA(si-Bmal1)or a negative sequence.In both rat thoracic aorta and RTAECs,the expressions of Bmal1,the cell cycle proteins CDK1,CDK4,CDK6,and cyclin B1,and apoptosis-related proteins Bax and Bcl-2 were detected using Western blotting.TUNEL staining was used to detect cell apoptosis in rat thoracic aorta,and the changes in cell cycle distribution and apoptosis in RTAECs were analyzed with flow cytometry.Results Compared with the control rats,the rats exposed to heat stress showed significantly increased blood pressures and lowered heart rate with elastic fiber disruption and increased expressions of Bmal1,cyclin B1 and CDK1 in the thoracic aorta(P<0.05).In cultured RTAECs,heat stress caused significant increase of Bmal1,cyclin B1 and CDK1 protein expression levels,which were obviously lowered in cells with prior si-Bmal1 transfection.Bmal1 knockdown also inhibited heat stress-induced increase of apoptosis in RTAECs as evidenced by decreased expression of Bax and increased expression of Bcl-2.Conclusion Heat stress upregulates Bmal1 expression and causes alterations in expressions of cyclins to trigger apoptosis of rat thoracic aorta endothelial cells,which can be partly alleviated by suppressing Bmal1 expression.
基金supported by the Earmarked Fund For Modern Agro-Industry Technology Research SystemNational High Technology Research and Development Program of P.R.China(No.863-2008AA101009-7), 863-2006AA10Z1D8+1 种基金National Key Technology R&D Program(No.2008BADB2B01)Key Technology R&D Program of Jiangsu Province(No.BE2008361)
文摘GPAT,AIRC and purH genes are involved in the de novo purine biosynthesis,and they all had significant effects on muscle inosine monophosphate(IMP) content in chickens.This study was designed to investigate the effects of GPAT,AIRC and purH genes on muscle IMP content in a relatively large population of Baier chickens;single genotype effects as well as the combined genotype effects were analyzed.The results further support that GPAT,AIRC and purH genes had effects on muscle IMP content;they might be candidate loci or linked to major genes affecting muscle IMP content.The combined genotypic effects were significantly higher than those of the single genotypes and were even larger when more gene loci were combined.We tentatively conclude that combined genotypes are superior to single genotypes as potential molecular markers for meat quality traits in chicken.
文摘The paper presented an implement method for a dynamic gene expression display software based on the GTK. This method established the dynamic presentation system of gene expression which according to gene expression data from gene chip hybridize at different time, adopted a linearity combination model and Pearson correlation coefficient algorithm. The system described the gene expression changes in graphic form, the gene expression changes with time and the changes in characteristics of the gene expression, also the changes in relations of the gene expression and regulation relationships among genes. The system also provided an integrated platform for analysis on gene chips data, especially for the research on the network ofgene regulation.
文摘Genetic linkage relationship of the natural colored fiber and six fuzzless seed germplasms in obsolete backgrounds of Gossypium hirsutum(AD genome) and G.barbadense were analyzed in the
文摘Background and Objective Marfan syndrome,a variable and heritable disorder of fibrous connective tissue,characterized by affecting skeletal,ocular and cardiovascular systems.With the research advancement of genetic mechanism,the diagnosis of Marfan syndrome,based on clinical manifestations and genetic evidence,is more accurate.The aim of this study is identification of genetic pathogenesis in a Chinese family.
文摘Previous study indicated that the thermo-sensitive genic malesterile(TGMS) gene in rice was regulated by temperature.TGMS rice plays an important role in hybrid rice production,because the application of the TGMS system in two-line breeding is laborsaving,timesaving,simple,inexpensive,efficient,and eliminating the limitations of the cytoplasmic male sterility(CMS) system.'AnnongS' is the first discovered and deeply studied TGMS rice lines in China.'AnnongS-1' and 'Y58S',two derivatives of TGMS line AnnongS,were both controlled by a single recessive gene named tms5,which was genetically mapped on chromosome 2.In this study,three populations('AnnongS-1' × 'Nanjing11','Y58S' × 'Q611',and 'Y58S' × 'Guanghui122') were developed and used for the molecular fine mapping of the tms5 gene.By analyzing recombination events in the sterile individuals using a total of 125 probes covering the tms5 region,the tms5 gene was physically mapped to a 19-kb DNA fragment between two markers 4039-1 and 4039-2,which were located on the BAC clone AP004039.After the construction of the physical map between two markers 4039-1 and 4039-2,a member(ONAC023) of the NAC(NAM-ATAF-CUC-related) gene family was identified as the candidate gene of the tms5 gene.
文摘ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a kind of chemical-material-coated-glass slides. The total RNAs were isolated from the tissues. Both the mRNAs from the degeneration and normal lumbar intervertebral disc in humans were reversely transcribed to the cDNAs, which used as the hybridization probes with the incorporations of fluorescent dUTP. The mixed probes were then hybridized to the cDNA microarray. After high-stringent washing, the cDNA microarray was scanned for the fluorescent signals and analyzed with computer image analysis. ResultsAmong the 4096 targets, there were 706 genes whose expression levels differed between the degeneration and normal lumbar intervertebral disc in all cases, comprising 298 up-regulated and 358 down-regulated ones. ConclusionDNA microarray technology is an effective technique in screening for differently expressed genes between the degeneration and normal lumbar intervertebral disc. Cell apoptosis plays an important role in the process of lumbar intervertebral disc degeneration.
基金Supported by the Funding of High Technology Project of Ministry of Science and Technology of China(863 Project,2013AA102504-03)
文摘Methionine and lysine are restrictive essential amino acids of livestock, they are also the most attentive indexes in the feed production to carry out the quality control and quality evaluation. Their contents in feed directly affect livestock protein synthesis. Bacillus natto has excellent probiotic properties. In this experiment, we used the genetic engineering method, fusion PCR technique, to connect methionine-rich gene （zein） from maize endosperm protein with lysine-rich gene （Cflr） from the pepper anther, then the fusion gene was inserted into the expression vector pHT43, and the recombinant plasmid pHT43/zein-Cflr was constructed. The recombinant plasmid was transferred into Bacillus natto, and induced by IPTG for the expression of the fusion gene. We found an apparent band at 40 ku site for the recombinant strain by SDS-PAGE. The contents of methionine and lysine were individually detected with HPLC, the quantities of methionine and lysine in the recombinant strain increased by 18.37% and 24.68% than the wild one, respectively. We also verified the stability of the recombinant bacterium during passaging, and found the stability was 100%. This study provided research-basis for the application of the recombined Bacillus natto as feed additive.
文摘Gene expression profiling at early stages(0～2 DPA) of fiber development in Gossypium hirsutum identified a number of transcription factors which were down regulated in fiberless mutants relative to wild type controls and which could play a role in controlling early fiber development.Chief among these was GhMYB25,a Mixta-like MYB gene.Transgenic GhMYB25-silenced cotton
