Plant metabolomics developed as a powerful tool to examine gene functions and to gain deeper insight into the physiology of the plant cell. In this study, we screened Arabidopsis lines overexpressing rice full-length ...Plant metabolomics developed as a powerful tool to examine gene functions and to gain deeper insight into the physiology of the plant cell. In this study, we screened Arabidopsis lines overexpressing rice full-length （FL） cDNAs （rice FOX Arabidopsis lines） using a gas chromatography-time-of-flight mass spectrometry （GC-TOF/MS）-based technique to identify rice genes that caused metabolic changes. This screening system allows fast and reliable identification of candi- date lines showing altered metabolite profiles. We performed metabolomic and transcriptomic analysis of a rice FOX Ara- bidopsis line that harbored the FL cDNA of the rice ortholog of the Lateral Organ Boundaries （LOB） Domain （LBD）/ Asymmetric Leaves2-1ike （ASL） gene of Arabidopsis, At-LBD37/ASL39. The investigated rice FOX Arabidopsis line showed prominent changes in the levels of metabolites related to nitrogen metabolism. The transcriptomic data as well as the results from the metabolite analysis of the Arabidopsis At-LBD37/ASL39-overexpressor plants were consistent with these findings. Furthermore, the metabolomic and transcriptomic analysis of the Os-LBD37/ASL39-overexpressing rice plants indicated that Os-LBD37/ASL39 is associated with processes related to nitrogen metabolism in rice. Thus, the combination of a metabolomics-based screening method and a gain-of-function approach is useful for rapid characterization of novel genes in both Arabidopsis and rice.展开更多
Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and af...Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and affects all components of the central and peripheral nervous systems that can range from dementia to diabetic neuropathy.The mechanistic target of rapamycin（m TOR） is a promising agent for the development of novel regenerative strategies for the treatment of DM.m TOR and its related signaling pathways impact multiple metabolic parameters that include cellular metabolic homeostasis,insulin resistance,insulin secretion,stem cell proliferation and differentiation,pancreatic β-cell function,and programmed cell death with apoptosis and autophagy.m TOR is central element for the protein complexes m TOR Complex 1（m TORC1） and m TOR Complex 2（m TORC2） and is a critical component for a number of signaling pathways that involve phosphoinositide 3-kinase（PI 3-K）,protein kinase B（Akt）,AMP activated protein kinase（AMPK）,silent mating type information regulation 2 homolog 1（Saccharomyces cerevisiae）（SIRT1）,Wnt1 inducible signaling pathway protein 1（WISP1）,and growth factors.As a result,m TOR represents an exciting target to offer new clinical avenues for the treatment of DM and the complications of this disease.Future studies directed to elucidate the delicate balance m TOR holds over cellular metabolism and the impact of its broad signaling pathways should foster the translation of these targets into effective clinical regimens for DM.展开更多
The flow near a wall suddenly set in motion for a viscoelastic fluid with the generalized Oldroyd-B model is studied. The fractional calculus approach is used in the constitutive relationship of fluid model. Exact ana...The flow near a wall suddenly set in motion for a viscoelastic fluid with the generalized Oldroyd-B model is studied. The fractional calculus approach is used in the constitutive relationship of fluid model. Exact analytical solutions of velocity and stress are obtained by using the discrete Laplace transform of the sequential fractional derivative and the Fox H-function. The obtained results indicate that some well known solutions for the Newtonian fluid, the generalized second grade fluid as well as the ordinary Oldroyd-B fluid, as limiting cases, are included in our solutions.展开更多
为确定狐狸源肺炎克雷伯氏菌的致病性、耐药性、耐药机制及其生物被膜(BF)形成能力,本研究对分离自病死狐狸的10株肺炎克雷伯氏菌进行形态特征、培养特性、生化试验、16S r RNA鉴定及khe基因鉴定,利用K-B法检测其药敏性,利用PCR方法检...为确定狐狸源肺炎克雷伯氏菌的致病性、耐药性、耐药机制及其生物被膜(BF)形成能力,本研究对分离自病死狐狸的10株肺炎克雷伯氏菌进行形态特征、培养特性、生化试验、16S r RNA鉴定及khe基因鉴定,利用K-B法检测其药敏性,利用PCR方法检测了其耐药基因、荚膜血清型、毒力基因,利用96孔微量板测定BF形成能力并进行了分离菌对小鼠的致病性试验。结果显示,这10株肺炎克雷伯氏菌均对多种常用抗菌药物耐药,均可以引起小鼠发病或死亡,但BF形成能力有明显差异。部分菌株携带floR、mcr-1、TEM等耐药基因和wabG、fimH、uge、rmpA等毒力基因,89F-2、58F-2、60N-1属于K1血清型。本研究结果为狐狸源肺炎克雷伯氏菌病的检测、诊断及防治提供了实验依据。同时,本实验首次从狐狸源肺炎克雷伯氏菌中检测到粘菌素耐药基因mcr-1,这将为黏菌素的临床使用和风险评估提供技术参考。展开更多
文摘Plant metabolomics developed as a powerful tool to examine gene functions and to gain deeper insight into the physiology of the plant cell. In this study, we screened Arabidopsis lines overexpressing rice full-length （FL） cDNAs （rice FOX Arabidopsis lines） using a gas chromatography-time-of-flight mass spectrometry （GC-TOF/MS）-based technique to identify rice genes that caused metabolic changes. This screening system allows fast and reliable identification of candi- date lines showing altered metabolite profiles. We performed metabolomic and transcriptomic analysis of a rice FOX Ara- bidopsis line that harbored the FL cDNA of the rice ortholog of the Lateral Organ Boundaries （LOB） Domain （LBD）/ Asymmetric Leaves2-1ike （ASL） gene of Arabidopsis, At-LBD37/ASL39. The investigated rice FOX Arabidopsis line showed prominent changes in the levels of metabolites related to nitrogen metabolism. The transcriptomic data as well as the results from the metabolite analysis of the Arabidopsis At-LBD37/ASL39-overexpressor plants were consistent with these findings. Furthermore, the metabolomic and transcriptomic analysis of the Os-LBD37/ASL39-overexpressing rice plants indicated that Os-LBD37/ASL39 is associated with processes related to nitrogen metabolism in rice. Thus, the combination of a metabolomics-based screening method and a gain-of-function approach is useful for rapid characterization of novel genes in both Arabidopsis and rice.
基金supported by American Diabetes Association,American Heart Association,NIH NIEHS,NIH NIA,NIH NINDS,and NIH ARRA
文摘Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and affects all components of the central and peripheral nervous systems that can range from dementia to diabetic neuropathy.The mechanistic target of rapamycin（m TOR） is a promising agent for the development of novel regenerative strategies for the treatment of DM.m TOR and its related signaling pathways impact multiple metabolic parameters that include cellular metabolic homeostasis,insulin resistance,insulin secretion,stem cell proliferation and differentiation,pancreatic β-cell function,and programmed cell death with apoptosis and autophagy.m TOR is central element for the protein complexes m TOR Complex 1（m TORC1） and m TOR Complex 2（m TORC2） and is a critical component for a number of signaling pathways that involve phosphoinositide 3-kinase（PI 3-K）,protein kinase B（Akt）,AMP activated protein kinase（AMPK）,silent mating type information regulation 2 homolog 1（Saccharomyces cerevisiae）（SIRT1）,Wnt1 inducible signaling pathway protein 1（WISP1）,and growth factors.As a result,m TOR represents an exciting target to offer new clinical avenues for the treatment of DM and the complications of this disease.Future studies directed to elucidate the delicate balance m TOR holds over cellular metabolism and the impact of its broad signaling pathways should foster the translation of these targets into effective clinical regimens for DM.
基金ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina (No 39970 715 )andtheNaturalFoundationoftheScientificCommitteeofJiangsuProvince (No 970 88)
基金The project supported by the National Natural Science Foundation of China(10272067)the Doctoral Program Foundation of the Education Ministry of China(20030422046)+1 种基金the Natural Science Foundation of Shandong Province,China(Y2006A 14)the Research Foundation of Shandong University at Weihai.
文摘The flow near a wall suddenly set in motion for a viscoelastic fluid with the generalized Oldroyd-B model is studied. The fractional calculus approach is used in the constitutive relationship of fluid model. Exact analytical solutions of velocity and stress are obtained by using the discrete Laplace transform of the sequential fractional derivative and the Fox H-function. The obtained results indicate that some well known solutions for the Newtonian fluid, the generalized second grade fluid as well as the ordinary Oldroyd-B fluid, as limiting cases, are included in our solutions.
文摘为确定狐狸源肺炎克雷伯氏菌的致病性、耐药性、耐药机制及其生物被膜(BF)形成能力,本研究对分离自病死狐狸的10株肺炎克雷伯氏菌进行形态特征、培养特性、生化试验、16S r RNA鉴定及khe基因鉴定,利用K-B法检测其药敏性,利用PCR方法检测了其耐药基因、荚膜血清型、毒力基因,利用96孔微量板测定BF形成能力并进行了分离菌对小鼠的致病性试验。结果显示,这10株肺炎克雷伯氏菌均对多种常用抗菌药物耐药,均可以引起小鼠发病或死亡,但BF形成能力有明显差异。部分菌株携带floR、mcr-1、TEM等耐药基因和wabG、fimH、uge、rmpA等毒力基因,89F-2、58F-2、60N-1属于K1血清型。本研究结果为狐狸源肺炎克雷伯氏菌病的检测、诊断及防治提供了实验依据。同时,本实验首次从狐狸源肺炎克雷伯氏菌中检测到粘菌素耐药基因mcr-1,这将为黏菌素的临床使用和风险评估提供技术参考。
