多药和有毒化合物排出家族(Multidrug and Toxic Compound Extrusion,MATE)是一个新的次级转运蛋白家族,此类转运蛋白对氨基葡糖、阳离子染料、多种抗生素和药物有转运作用。拟南芥中的MATE基因家族是一个多基因家族,大概由56个成员构成...多药和有毒化合物排出家族(Multidrug and Toxic Compound Extrusion,MATE)是一个新的次级转运蛋白家族,此类转运蛋白对氨基葡糖、阳离子染料、多种抗生素和药物有转运作用。拟南芥中的MATE基因家族是一个多基因家族,大概由56个成员构成,文章综述了拟南芥中MATE家族基因的研究进展,包括3个方面:第一是拟南芥中MATE家族成员的构成及主要特征;第二描述了转运蛋白的主要功能;第三分析了其功能多样的大致原因。此外,还展望了此家族研究的一些前景。展开更多
植物多药和有毒化合物排出家族(MATE,multidrug and toxic compound extrusion)是一类可转运毒素、金属离子、次级代谢产物的次级转运蛋白家族。该家族主要在植物的解毒机制中发挥作用,部分成员也参与植物的形态建成过程。MATE家族在烟...植物多药和有毒化合物排出家族(MATE,multidrug and toxic compound extrusion)是一类可转运毒素、金属离子、次级代谢产物的次级转运蛋白家族。该家族主要在植物的解毒机制中发挥作用,部分成员也参与植物的形态建成过程。MATE家族在烟草基因组中的数量、特征及功能目前尚未开展系统分析。本研究利用生物信息学方法对普通烟草(Nicotiana tabacum)基因组中的MATE基因进行了预测分析,共预测到131个基因,分为4个亚家族。亚家族3在进化树中形成较为独立的分枝,其跨膜区数量、亚细胞定位、保守结构域方面与其他亚家族不同。转录组数据显示,相当一部分MATE家族基因在所有组织中低量表达。GO功能注释结果表明该家族成员主要作为一种转运体,在应激响应、生物调控等过程中发挥作用。本研究为烟草及其他植物中MATE家族的鉴定和功能研究提供了数据基础。展开更多
目的采用网状meta分析方法系统性评价去氨加压素、警铃、去氨加压素联合警铃、去氨加压素联合抗胆碱能药物4种干预措施治疗儿童单症状夜遗尿的疗效。方法系统检索PubMed、Cochrance Library、EMBase和Web of Science数据库,时间截止到2...目的采用网状meta分析方法系统性评价去氨加压素、警铃、去氨加压素联合警铃、去氨加压素联合抗胆碱能药物4种干预措施治疗儿童单症状夜遗尿的疗效。方法系统检索PubMed、Cochrance Library、EMBase和Web of Science数据库,时间截止到2017年8月1日。纳入对比去氨加压素、警铃、去氨加压素联合警铃、去氨加压素联合抗胆碱能药物中任意2个或以上干预措施治疗儿童单症状夜遗尿症的随机对照试验(RCT)。按照制定好的纳入排除标准进行文献筛选,对最终纳入的RCT进行数据提取和质量评价,利用统计软件R 3.3.2和STATA 14.0完成数据分析。结果纳入15个RCT,共计1 505例患儿。网状meta分析提示,去氨加压素联合抗胆碱能药物的完全反应率和成功率高于去氨加压素(完全反应率OR=2.8,95%CI:1.5～5.4;成功率OR=3.5,95%CI:1.7～7.5)和警铃(完全反应率OR=2.7,95%CI:1.1～6.6;成功率OR=3.8,95%CI:1.6～9.0);去氨加压素联合警铃成功率高于警铃(OR=1.9,95%CI:1.1～3.4);治疗结束后警铃的复发率明显低于去氨加压素(OR=0.15,95%CI:0.03～0.53)。排序结果显示,去氨加压素联合抗胆碱能药物治疗后的完全反应率和成功率治疗效果最佳,去氨加压素联合警铃能最大程度降低每周尿床次数,警铃的复发率在4种方案中最低。结论去氨加压素联合抗胆碱能药物治疗效果明显好于单用警铃或去氨加压素;去氨加压素联合警铃方案比单用警铃或去氨加压素治疗效果略有优势或相近;去氨加压素和警铃治疗效果相近;警铃治疗的复发率最低。展开更多
【目的】水稻灌浆期高温严重影响其产量和品质,解析温度影响灌浆的分子机制,对保障水稻高产和优质意义重大。【方法】利用水稻中一份温度敏感的灌浆缺陷突变体dg1,结合遗传、生理、生化和3H-ABA feeding等技术方法,解析温度影响水稻灌...【目的】水稻灌浆期高温严重影响其产量和品质,解析温度影响灌浆的分子机制,对保障水稻高产和优质意义重大。【方法】利用水稻中一份温度敏感的灌浆缺陷突变体dg1,结合遗传、生理、生化和3H-ABA feeding等技术方法,解析温度影响水稻灌浆的分子机制。【结果】我们克隆了一个调控水稻籽粒灌浆的关键基因DG1。DG1编码一个MATE转运蛋白,该蛋白具有外排脱落酸(abscisicacid,ABS)活性,在节和小花轴参与调控叶片到颖果的ABA长距离运输。高温通过诱导DG1高表达促进叶片到颖果的ABA长距离转运,该长距离转运的ABA诱导淀粉合成关键基因表达,从而确保高温下水稻籽粒正常灌浆。相关研究成果以“Leaf-derived ABA regulates riceseed development via atransporter-mediated and temperaturesensitive mechanism”为题于2021年1月发表在国际期刊Science Advances(10.1126/sciadv.abc8873)。【结论】该成果揭示了DG1通过调控叶片到颖果ABA长距离运输确保高温下种子正常发育的分子机制。展开更多
Complex traits are multifactorial traits controlled by polygenic host factors.These trait-related phenotypic characteristics and performance including body weight,blood chemistry,immune cell profiles,as well host susc...Complex traits are multifactorial traits controlled by polygenic host factors.These trait-related phenotypic characteristics and performance including body weight,blood chemistry,immune cell profiles,as well host susceptibility to infectious and chronic diseases.In recent years,tremendous efforts were invested aiming to map the host genetic factors attribute to these traits and subsequently clone the gene/s underlying these loci.In parallel to human studies,a number of mouse models and approaches were developed aimed to enhance the mapping process and the gene cloning.These include of using resources such as F2,backcross,advanced intercross lines,outbred populations,consomic,congenic and recombinant inbred lines(RIL).The constraints of these approaches were the limited resolution mapping of genomic regions of the quantitative trait loci(QTL)associated with the trait of interests,and the limited genetic diversity observed in the parental founders.To overcome these limitations,a new genetically highly diverse recombinant inbred lines of mouse population was established,namely the Collaborative Cross(CC),created from full reciprocal mating of 8 divergent strains of mice:A/J,C57BL/6J,129S1/SvI mJ,NOD/LtJ,NZO/HiL tJ,CAST/Ei,PWK/PhJ,and WSB/EiJ.By intercrossing these eight founders to generate the different CC lines,the genetic makeup of the newly developed resource is completely different from the eight parental lines,and will show heterosis,which subsequently will response differently comparing with their original founders.Finally,our results suggest that it is not essential to defining the phenotypic response of the eight parental lines,prior of assessing the CC lines,because it is believed that genetic interaction of the new genetic makeup of the new lines will reveal new phenotypic response,which completely different from the parental lines.In this report,we present to the community the power of the CC for dissecting variety of complex traits including host susceptibility to infectious and chronic diseases as well body performance traits.Based on our results from a variety of studies,we recommend to the community,that the best strategy of using this population is to aim of phenotyping about 50 and more of CC lines,with limited number of biological replicates(3-4 mice per line),and subsequently using the publicly available high dense genotype information of the CC lines as well the sequence database of the eight founders,it will be possible performing QTL mapping to a unprecedented precision genomic regions less than 1 MB,subsequently lead to identify potential strong candidate genes.These achievements are believed cannot be obtained with any other currently available mouse resource populations.展开更多
The traditional manner to design public transportation system is to sequentially design the transit network and public bicycle network. A new public transportation system design problem that simultaneously considers b...The traditional manner to design public transportation system is to sequentially design the transit network and public bicycle network. A new public transportation system design problem that simultaneously considers both bus network design and public bicycle network design is proposed. The chemical reaction optimization(CRO) is designed to solve the problem. A shortcoming of CRO is that, when the two-molecule collisions take place, the molecules are randomly picked from the container.Hence, we improve CRO by employing different mating strategies. The computational results confirm the benefits of the mating strategies. Numerical experiments are conducted on the Sioux-Falls network. A comparison with the traditional sequential modeling framework indicates that the proposed approach has a better performance and is more robust. The practical applicability of the approach is proved by employing a real size network.展开更多
文摘多药和有毒化合物排出家族(Multidrug and Toxic Compound Extrusion,MATE)是一个新的次级转运蛋白家族,此类转运蛋白对氨基葡糖、阳离子染料、多种抗生素和药物有转运作用。拟南芥中的MATE基因家族是一个多基因家族,大概由56个成员构成,文章综述了拟南芥中MATE家族基因的研究进展,包括3个方面:第一是拟南芥中MATE家族成员的构成及主要特征;第二描述了转运蛋白的主要功能;第三分析了其功能多样的大致原因。此外,还展望了此家族研究的一些前景。
文摘【目的】水稻灌浆期高温严重影响其产量和品质,解析温度影响灌浆的分子机制,对保障水稻高产和优质意义重大。【方法】利用水稻中一份温度敏感的灌浆缺陷突变体dg1,结合遗传、生理、生化和3H-ABA feeding等技术方法,解析温度影响水稻灌浆的分子机制。【结果】我们克隆了一个调控水稻籽粒灌浆的关键基因DG1。DG1编码一个MATE转运蛋白,该蛋白具有外排脱落酸(abscisicacid,ABS)活性,在节和小花轴参与调控叶片到颖果的ABA长距离运输。高温通过诱导DG1高表达促进叶片到颖果的ABA长距离转运,该长距离转运的ABA诱导淀粉合成关键基因表达,从而确保高温下水稻籽粒正常灌浆。相关研究成果以“Leaf-derived ABA regulates riceseed development via atransporter-mediated and temperaturesensitive mechanism”为题于2021年1月发表在国际期刊Science Advances(10.1126/sciadv.abc8873)。【结论】该成果揭示了DG1通过调控叶片到颖果ABA长距离运输确保高温下种子正常发育的分子机制。
文摘Complex traits are multifactorial traits controlled by polygenic host factors.These trait-related phenotypic characteristics and performance including body weight,blood chemistry,immune cell profiles,as well host susceptibility to infectious and chronic diseases.In recent years,tremendous efforts were invested aiming to map the host genetic factors attribute to these traits and subsequently clone the gene/s underlying these loci.In parallel to human studies,a number of mouse models and approaches were developed aimed to enhance the mapping process and the gene cloning.These include of using resources such as F2,backcross,advanced intercross lines,outbred populations,consomic,congenic and recombinant inbred lines(RIL).The constraints of these approaches were the limited resolution mapping of genomic regions of the quantitative trait loci(QTL)associated with the trait of interests,and the limited genetic diversity observed in the parental founders.To overcome these limitations,a new genetically highly diverse recombinant inbred lines of mouse population was established,namely the Collaborative Cross(CC),created from full reciprocal mating of 8 divergent strains of mice:A/J,C57BL/6J,129S1/SvI mJ,NOD/LtJ,NZO/HiL tJ,CAST/Ei,PWK/PhJ,and WSB/EiJ.By intercrossing these eight founders to generate the different CC lines,the genetic makeup of the newly developed resource is completely different from the eight parental lines,and will show heterosis,which subsequently will response differently comparing with their original founders.Finally,our results suggest that it is not essential to defining the phenotypic response of the eight parental lines,prior of assessing the CC lines,because it is believed that genetic interaction of the new genetic makeup of the new lines will reveal new phenotypic response,which completely different from the parental lines.In this report,we present to the community the power of the CC for dissecting variety of complex traits including host susceptibility to infectious and chronic diseases as well body performance traits.Based on our results from a variety of studies,we recommend to the community,that the best strategy of using this population is to aim of phenotyping about 50 and more of CC lines,with limited number of biological replicates(3-4 mice per line),and subsequently using the publicly available high dense genotype information of the CC lines as well the sequence database of the eight founders,it will be possible performing QTL mapping to a unprecedented precision genomic regions less than 1 MB,subsequently lead to identify potential strong candidate genes.These achievements are believed cannot be obtained with any other currently available mouse resource populations.
基金Projects(71301115,71271150,71101102)supported by the National Natural Science Foundation of ChinaProject(20130032120009)supported by Specialized Research Fund for the Doctoral Program of Higher Education of China
文摘The traditional manner to design public transportation system is to sequentially design the transit network and public bicycle network. A new public transportation system design problem that simultaneously considers both bus network design and public bicycle network design is proposed. The chemical reaction optimization(CRO) is designed to solve the problem. A shortcoming of CRO is that, when the two-molecule collisions take place, the molecules are randomly picked from the container.Hence, we improve CRO by employing different mating strategies. The computational results confirm the benefits of the mating strategies. Numerical experiments are conducted on the Sioux-Falls network. A comparison with the traditional sequential modeling framework indicates that the proposed approach has a better performance and is more robust. The practical applicability of the approach is proved by employing a real size network.
