Glutathione S-transferases(GSTs) are a family of soluble detoxification enzymes which use reduced glutathione(GSH) in conjugation and reduction reactions.Toxic electrophiles,including a variety of carcinogens,are subs...Glutathione S-transferases(GSTs) are a family of soluble detoxification enzymes which use reduced glutathione(GSH) in conjugation and reduction reactions.Toxic electrophiles,including a variety of carcinogens,are substrates for the GSTs and are more easily excreted into bile or urine after conjugation or reduction .The three-dimensional structures of GSTs from several species,including humans,have been determined.GST activity has been found to present in all human tissues,and expression of the various GST isoenzymes differs in degree in the various tissues. Glutathione S-transferases may play a role in the protection of cells against toxic electrophiles and in the resistance to cancer chemotherapeutic agants.The polymorphisms of GSTs genes are one of the important factors that exercise influence on individual susceptibility to cancer.展开更多
目的研究重组抗原26 ku日本血吸虫谷胱甘肽-硫-转移酶(SjGST)及其单克隆抗体在血吸虫患者分子诊断中的应用。方法用已纯化的重组SjGST抗原免疫近交系(BALB/c)小鼠,数周后取免疫鼠脾细胞,与SP2/0骨髓瘤细胞进行细胞融合,选择性培养基筛...目的研究重组抗原26 ku日本血吸虫谷胱甘肽-硫-转移酶(SjGST)及其单克隆抗体在血吸虫患者分子诊断中的应用。方法用已纯化的重组SjGST抗原免疫近交系(BALB/c)小鼠,数周后取免疫鼠脾细胞,与SP2/0骨髓瘤细胞进行细胞融合,选择性培养基筛选出杂交瘤细胞,经有限稀释法克隆化,扩大培养制备针对重组SjGST抗原的单克隆抗体细胞株。亲和层析法纯化单克隆抗体。酶联免疫吸附试验(ELISA)检测急性血吸虫病患者和非流行区正常人血清。结果成功获得重组蛋白26 ku SjGST,十二烷基硫酸钠-聚丙烯酰胺凝胶电泳显示与预期相对分子质量大小相符的蛋白条带。成功获得能够长期分泌抗重组SjGST单克隆抗体的杂交瘤细胞株,ELISA与蛋白质印迹试验均显示杂交瘤细胞培养上清中含有重组SjGST抗体。ELISA检测患者血清结果表明,26 ku SjGST用于急性血吸虫病患者血清中抗体检测的阳性率为90.6%,26 ku SjGST抗体用于急性血吸虫病患者血清中循环抗原检测的阳性率为59.4%。结论该重组蛋白用于急性血吸虫病患者血清中抗体的检测具有良好的免疫反应性,26 ku SjGST抗体对循环抗原的检测可作为抗体检测的有效补充。展开更多
文摘Glutathione S-transferases(GSTs) are a family of soluble detoxification enzymes which use reduced glutathione(GSH) in conjugation and reduction reactions.Toxic electrophiles,including a variety of carcinogens,are substrates for the GSTs and are more easily excreted into bile or urine after conjugation or reduction .The three-dimensional structures of GSTs from several species,including humans,have been determined.GST activity has been found to present in all human tissues,and expression of the various GST isoenzymes differs in degree in the various tissues. Glutathione S-transferases may play a role in the protection of cells against toxic electrophiles and in the resistance to cancer chemotherapeutic agants.The polymorphisms of GSTs genes are one of the important factors that exercise influence on individual susceptibility to cancer.
文摘目的研究重组抗原26 ku日本血吸虫谷胱甘肽-硫-转移酶(SjGST)及其单克隆抗体在血吸虫患者分子诊断中的应用。方法用已纯化的重组SjGST抗原免疫近交系(BALB/c)小鼠,数周后取免疫鼠脾细胞,与SP2/0骨髓瘤细胞进行细胞融合,选择性培养基筛选出杂交瘤细胞,经有限稀释法克隆化,扩大培养制备针对重组SjGST抗原的单克隆抗体细胞株。亲和层析法纯化单克隆抗体。酶联免疫吸附试验(ELISA)检测急性血吸虫病患者和非流行区正常人血清。结果成功获得重组蛋白26 ku SjGST,十二烷基硫酸钠-聚丙烯酰胺凝胶电泳显示与预期相对分子质量大小相符的蛋白条带。成功获得能够长期分泌抗重组SjGST单克隆抗体的杂交瘤细胞株,ELISA与蛋白质印迹试验均显示杂交瘤细胞培养上清中含有重组SjGST抗体。ELISA检测患者血清结果表明,26 ku SjGST用于急性血吸虫病患者血清中抗体检测的阳性率为90.6%,26 ku SjGST抗体用于急性血吸虫病患者血清中循环抗原检测的阳性率为59.4%。结论该重组蛋白用于急性血吸虫病患者血清中抗体的检测具有良好的免疫反应性,26 ku SjGST抗体对循环抗原的检测可作为抗体检测的有效补充。
