[Objective] The paper was to develop genetic engineering vaccine that can express α exotoxin antigen protein efficiently without destroying its immunogenicity for preventing and controlling the diseases caused by Clo...[Objective] The paper was to develop genetic engineering vaccine that can express α exotoxin antigen protein efficiently without destroying its immunogenicity for preventing and controlling the diseases caused by Clostridium perfringens. [Method] Efficiently expressed soluble recombinant α protein was obtained from Escherichia coli expression system by optimizing codon,removing signal peptide,selecting sequences with better hydrophilicity and antigenicity,and optimizing expression conditions. [Result] Mice obtained higher serum antibody level when immunized by α protein,and the immune protection rates against type A,type B,type C and type D C. perfringens were 100%,90%,85% and 90%,respectively. The antibody titer of mice within 7-14 d after the third immunization reached the peak. [Conclusion]The α protein has good immunogenicity,and can be further used to develop genetic engineering subunit vaccines for preventing C. perfringens.展开更多
为优化产气荚膜梭菌ε毒素重组蛋白的表达条件,以前期构建的产气荚膜梭菌ε毒素重组突变体为基础,通过控制变量法确定诱导温度、诱导时间、IPTG诱导浓度以及诱导时菌液浓度等原核蛋白表达条件。结果表明,ε毒素的重组突变体在37℃、菌液...为优化产气荚膜梭菌ε毒素重组蛋白的表达条件,以前期构建的产气荚膜梭菌ε毒素重组突变体为基础,通过控制变量法确定诱导温度、诱导时间、IPTG诱导浓度以及诱导时菌液浓度等原核蛋白表达条件。结果表明,ε毒素的重组突变体在37℃、菌液OD_(600)值为0.895~1.295,1.6 mM IPTG诱导6 h条件下可溶性表达量最高。这为下一步大规模生产ε毒素基因工程亚单位疫苗奠定基础。展开更多
基金Supported by the 13th Five-Year National Key Research and Development Program(2016YFD0500901)
文摘[Objective] The paper was to develop genetic engineering vaccine that can express α exotoxin antigen protein efficiently without destroying its immunogenicity for preventing and controlling the diseases caused by Clostridium perfringens. [Method] Efficiently expressed soluble recombinant α protein was obtained from Escherichia coli expression system by optimizing codon,removing signal peptide,selecting sequences with better hydrophilicity and antigenicity,and optimizing expression conditions. [Result] Mice obtained higher serum antibody level when immunized by α protein,and the immune protection rates against type A,type B,type C and type D C. perfringens were 100%,90%,85% and 90%,respectively. The antibody titer of mice within 7-14 d after the third immunization reached the peak. [Conclusion]The α protein has good immunogenicity,and can be further used to develop genetic engineering subunit vaccines for preventing C. perfringens.
文摘为优化产气荚膜梭菌ε毒素重组蛋白的表达条件,以前期构建的产气荚膜梭菌ε毒素重组突变体为基础,通过控制变量法确定诱导温度、诱导时间、IPTG诱导浓度以及诱导时菌液浓度等原核蛋白表达条件。结果表明,ε毒素的重组突变体在37℃、菌液OD_(600)值为0.895~1.295,1.6 mM IPTG诱导6 h条件下可溶性表达量最高。这为下一步大规模生产ε毒素基因工程亚单位疫苗奠定基础。
