The peptide of amino acids 141～160 of VP1 protein of foot\|and\|mouth disease virus (FMDV) is a major B cell epitope and the peptide of amino acids 21～40 is an important T cell epitope.In this study,the DNA fragment...The peptide of amino acids 141～160 of VP1 protein of foot\|and\|mouth disease virus (FMDV) is a major B cell epitope and the peptide of amino acids 21～40 is an important T cell epitope.In this study,the DNA fragments of 141～160 and 21～40 peptide epitopes of a strain of type O FMDV was chemically synthesized and arranged into a tandem repeat 141～160 (20AA)\|21～40 (20AA)\|141～160 (20AA).This tandem sequence was fused to the 3′ end of the heavy chain constant region gene of swine immunoglobulin G and was then cloned into mammalian expression vector pCDM8 to form a recombinant plasmid pCDM8FZ3.After pCDM8FZ3 was inoculated intramuscularly into guinea pigs,it elicited a neutralizing antibody response and a specific spleen T cell proliferative response,and 66% of the vaccinated animals were protected from viral challenge.Our study indicated that the heavy chain constant region of swine IgG can act as the carrier protein for FMDV peptide epitopes,and pCDM8FZ3 is a potential DNA vaccine candidate to prevent FMDV infection.展开更多
目的:使用反相高效液相色谱法测定色盐杆菌新种ST307的DNAG+Cmol%含量。方法:以Escherichia coli DH5α为标准菌株,采用90%重蒸水10%甲醇为流动相,检测波长260nm,流速1ml.min-1,在VenusilM P C18柱上对四种碱基进行分离。结果:DNA碱基...目的:使用反相高效液相色谱法测定色盐杆菌新种ST307的DNAG+Cmol%含量。方法:以Escherichia coli DH5α为标准菌株,采用90%重蒸水10%甲醇为流动相,检测波长260nm,流速1ml.min-1,在VenusilM P C18柱上对四种碱基进行分离。结果:DNA碱基分离效果好,以外标法计算得到标准菌株DH5α的DNAG+Cmol%含量为50.3%,待测菌株ST307的DNAG+Cmol%含量为60.5%。结论:采用反向高效液相色谱法测定色盐杆菌的DNAG+Cmol%含量准确可靠。展开更多
文摘The peptide of amino acids 141～160 of VP1 protein of foot\|and\|mouth disease virus (FMDV) is a major B cell epitope and the peptide of amino acids 21～40 is an important T cell epitope.In this study,the DNA fragments of 141～160 and 21～40 peptide epitopes of a strain of type O FMDV was chemically synthesized and arranged into a tandem repeat 141～160 (20AA)\|21～40 (20AA)\|141～160 (20AA).This tandem sequence was fused to the 3′ end of the heavy chain constant region gene of swine immunoglobulin G and was then cloned into mammalian expression vector pCDM8 to form a recombinant plasmid pCDM8FZ3.After pCDM8FZ3 was inoculated intramuscularly into guinea pigs,it elicited a neutralizing antibody response and a specific spleen T cell proliferative response,and 66% of the vaccinated animals were protected from viral challenge.Our study indicated that the heavy chain constant region of swine IgG can act as the carrier protein for FMDV peptide epitopes,and pCDM8FZ3 is a potential DNA vaccine candidate to prevent FMDV infection.
文摘目的:使用反相高效液相色谱法测定色盐杆菌新种ST307的DNAG+Cmol%含量。方法:以Escherichia coli DH5α为标准菌株,采用90%重蒸水10%甲醇为流动相,检测波长260nm,流速1ml.min-1,在VenusilM P C18柱上对四种碱基进行分离。结果:DNA碱基分离效果好,以外标法计算得到标准菌株DH5α的DNAG+Cmol%含量为50.3%,待测菌株ST307的DNAG+Cmol%含量为60.5%。结论:采用反向高效液相色谱法测定色盐杆菌的DNAG+Cmol%含量准确可靠。
