旨在了解猪脾转移因子(TF)对新城疫病毒(NDV)弱毒疫苗LaSota株的免疫增强效果及机制。本研究分别采用不同剂量(10^(-2)、10^(-3)、10^(-4)、10^(-5)羽份)LaSota疫苗株单独(单独免疫组)、LaSota疫苗株与TF联合(联合免疫组)免疫SPF鸡,14 ...旨在了解猪脾转移因子(TF)对新城疫病毒(NDV)弱毒疫苗LaSota株的免疫增强效果及机制。本研究分别采用不同剂量(10^(-2)、10^(-3)、10^(-4)、10^(-5)羽份)LaSota疫苗株单独(单独免疫组)、LaSota疫苗株与TF联合(联合免疫组)免疫SPF鸡,14 d后以NDV F 48 E 9强毒攻毒,同时设立对照组(非免疫攻毒)和空白组(非免疫非攻毒),并采用ELISA方法与蛋白质芯片技术分别测定外周血IL-4、IFN-γ与IL-12 P40浓度。结果显示,鸡免疫10^(-2)、10^(-3)、10^(-4)、10^(-5)羽份时疫苗攻毒保护率和半数保护量(PD_(50))如下:单独免疫组分别为100%、55%、0%、0%和0.0008羽份,联合免疫组分别为100%、75%、0%、0%和0.0005羽份,对照组和空白组死亡率分别为100%和0%。免疫10^(-3)羽份疫苗后,联合免疫组IL-4和IFN-γ含量均高于其他组,并于第7、14天差异极显著(P<0.01);攻毒后,联合免疫组IL-4、IFN-γ和IL-12 P40含量均高于其他组,IL-4于第1、14天,IFN-γ于第1、3天,IL-12 P40于第1天差异极显著(P<0.01)。综上表明,TF可增强IFN-γ、IL-12介导的细胞免疫和IL-4介导的体液免疫,提高LaSota株弱毒疫苗的免疫保护率,降低疫苗PD_(50);在抵抗NDV F 48 E 9强毒攻击时,联合免疫组的免疫保护率明显高于单独免疫组。展开更多
为了控制和跟踪克拉霉素合成工艺,制备了克拉霉素A(E)-9-O-甲基肟.以克拉霉素肟为原料,通过硅烷化、甲基化和脱保护三步反应合成了克拉霉素A(E)-9-O-甲基肟,并进行了HPLC分析和表征(1 H NMR和13 CNMR).实验结果表明,反应的催化剂、溶剂...为了控制和跟踪克拉霉素合成工艺,制备了克拉霉素A(E)-9-O-甲基肟.以克拉霉素肟为原料,通过硅烷化、甲基化和脱保护三步反应合成了克拉霉素A(E)-9-O-甲基肟,并进行了HPLC分析和表征(1 H NMR和13 CNMR).实验结果表明,反应的催化剂、溶剂和pH值会对此化合物的合成产生很大影响.HPLC分析条件:流动相为乙腈∶KH2PO4(0.033mol/mL)=45∶55(pH=4.0),检测波长210nm,柱温为30℃,流速为1.0mL/min.此化合物的合成有利于用HPLC方法对反应进程进行有效跟踪与质量监控.展开更多
Powdery mildew, caused by Blumeria graminis f. sp. tritici(Bgt), is one of the most devastating diseases of common wheat(Triticum aestivum L.). The wheat line 92145 E8-9 is immune to Bgt isolate E09. Genetic analysis ...Powdery mildew, caused by Blumeria graminis f. sp. tritici(Bgt), is one of the most devastating diseases of common wheat(Triticum aestivum L.). The wheat line 92145 E8-9 is immune to Bgt isolate E09. Genetic analysis reveals that the powdery mildew resistance in 92145 E8-9 is controlled by a single dominant gene, temporarily designated Ml92145 E8-9. Bulkedsegregant analysis(BSA) with simple sequence repeat(SSR) markers indicates that Ml92145 E8-9 is located on chromosome 2 AL. According to the reactions of 92145 E8-9,VPM1(Pm4 b carrier), and Lankao 906(PmLK906 carrier) to 14 Bgt isolates, the resistance spectrum of 92145 E8-9 differs from those of Pm4 b and PmLK906, both of which were previously localized to 2 AL. To test the allelism among Ml92145 E8-9, Pm4 b and PmLK906, two F2 populations of 92145 E8-9 × VPM1(Pm4 b) and 92145 E8-9 × Lankao 906(PmLK906) were developed in this study. Screening of 784 F2 progeny of 92145 E8-9 × VPM1 and 973 F2 progeny of 92145 E8-9 × Lankao 906 for Bgt isolate E09 identified 37 and 19 susceptible plants, respectively. These findings indicated that Ml92145 E8-9 is non-allelic to either Pm4 b or PmLK906. Thus, Ml92145 E8-9 is likely to be a new powdery mildew resistance gene on2 AL. New polymorphic markers were developed based on the collinearity of genomic regions of Ml92145 E8-9 with the reference sequences of the International Wheat Genome Sequencing Consortium(IWGSC). Ml92145 E8-9 was mapped to a 3.6 c M interval flanked by molecular markers Xsdauk13 and Xsdauk682. This study also developed five powdery mildew-resistant wheat lines(SDAU3561, SDAU3562, SDAU4173, SDAU4174, and SDAU4175)using flanking marker-aided selection. The markers closely linked to Ml92145 E8-9 would be useful in marker-assisted selection for wheat powdery mildew resistance breeding.展开更多
文摘旨在了解猪脾转移因子(TF)对新城疫病毒(NDV)弱毒疫苗LaSota株的免疫增强效果及机制。本研究分别采用不同剂量(10^(-2)、10^(-3)、10^(-4)、10^(-5)羽份)LaSota疫苗株单独(单独免疫组)、LaSota疫苗株与TF联合(联合免疫组)免疫SPF鸡,14 d后以NDV F 48 E 9强毒攻毒,同时设立对照组(非免疫攻毒)和空白组(非免疫非攻毒),并采用ELISA方法与蛋白质芯片技术分别测定外周血IL-4、IFN-γ与IL-12 P40浓度。结果显示,鸡免疫10^(-2)、10^(-3)、10^(-4)、10^(-5)羽份时疫苗攻毒保护率和半数保护量(PD_(50))如下:单独免疫组分别为100%、55%、0%、0%和0.0008羽份,联合免疫组分别为100%、75%、0%、0%和0.0005羽份,对照组和空白组死亡率分别为100%和0%。免疫10^(-3)羽份疫苗后,联合免疫组IL-4和IFN-γ含量均高于其他组,并于第7、14天差异极显著(P<0.01);攻毒后,联合免疫组IL-4、IFN-γ和IL-12 P40含量均高于其他组,IL-4于第1、14天,IFN-γ于第1、3天,IL-12 P40于第1天差异极显著(P<0.01)。综上表明,TF可增强IFN-γ、IL-12介导的细胞免疫和IL-4介导的体液免疫,提高LaSota株弱毒疫苗的免疫保护率,降低疫苗PD_(50);在抵抗NDV F 48 E 9强毒攻击时,联合免疫组的免疫保护率明显高于单独免疫组。
文摘为了控制和跟踪克拉霉素合成工艺,制备了克拉霉素A(E)-9-O-甲基肟.以克拉霉素肟为原料,通过硅烷化、甲基化和脱保护三步反应合成了克拉霉素A(E)-9-O-甲基肟,并进行了HPLC分析和表征(1 H NMR和13 CNMR).实验结果表明,反应的催化剂、溶剂和pH值会对此化合物的合成产生很大影响.HPLC分析条件:流动相为乙腈∶KH2PO4(0.033mol/mL)=45∶55(pH=4.0),检测波长210nm,柱温为30℃,流速为1.0mL/min.此化合物的合成有利于用HPLC方法对反应进程进行有效跟踪与质量监控.
基金financially supported by Geneti-cally Modified Organisms Breeding Major Projects(2016ZX08009003-001-006)the National Natural Science Foundation of China(31471488 and 31520203911)the National Basic Research Program of China(2014CB138100)
文摘Powdery mildew, caused by Blumeria graminis f. sp. tritici(Bgt), is one of the most devastating diseases of common wheat(Triticum aestivum L.). The wheat line 92145 E8-9 is immune to Bgt isolate E09. Genetic analysis reveals that the powdery mildew resistance in 92145 E8-9 is controlled by a single dominant gene, temporarily designated Ml92145 E8-9. Bulkedsegregant analysis(BSA) with simple sequence repeat(SSR) markers indicates that Ml92145 E8-9 is located on chromosome 2 AL. According to the reactions of 92145 E8-9,VPM1(Pm4 b carrier), and Lankao 906(PmLK906 carrier) to 14 Bgt isolates, the resistance spectrum of 92145 E8-9 differs from those of Pm4 b and PmLK906, both of which were previously localized to 2 AL. To test the allelism among Ml92145 E8-9, Pm4 b and PmLK906, two F2 populations of 92145 E8-9 × VPM1(Pm4 b) and 92145 E8-9 × Lankao 906(PmLK906) were developed in this study. Screening of 784 F2 progeny of 92145 E8-9 × VPM1 and 973 F2 progeny of 92145 E8-9 × Lankao 906 for Bgt isolate E09 identified 37 and 19 susceptible plants, respectively. These findings indicated that Ml92145 E8-9 is non-allelic to either Pm4 b or PmLK906. Thus, Ml92145 E8-9 is likely to be a new powdery mildew resistance gene on2 AL. New polymorphic markers were developed based on the collinearity of genomic regions of Ml92145 E8-9 with the reference sequences of the International Wheat Genome Sequencing Consortium(IWGSC). Ml92145 E8-9 was mapped to a 3.6 c M interval flanked by molecular markers Xsdauk13 and Xsdauk682. This study also developed five powdery mildew-resistant wheat lines(SDAU3561, SDAU3562, SDAU4173, SDAU4174, and SDAU4175)using flanking marker-aided selection. The markers closely linked to Ml92145 E8-9 would be useful in marker-assisted selection for wheat powdery mildew resistance breeding.
