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
目的分别对自建生化检测系统(简称自建系统)和配套生化检测系统(简称配套系统)进行初步性能评价。方法依照美国临床实验室标准化委员会(NCCLS)EP10-A2文件,使用自建系统(OLYMPUS AU400生化分析仪、罗氏cfas校准品及国产试剂)和配套系统(...目的分别对自建生化检测系统(简称自建系统)和配套生化检测系统(简称配套系统)进行初步性能评价。方法依照美国临床实验室标准化委员会(NCCLS)EP10-A2文件,使用自建系统(OLYMPUS AU400生化分析仪、罗氏cfas校准品及国产试剂)和配套系统(OLYMPUS AU 400生化分析仪、OLYMPUS校准品及OLYMPUS原装试剂)测定天门冬氨酸氨基转移酶(AST)、葡萄糖(Glu)、γ-谷氨酰基转移酶(GGT)、丙氨酸氨基转移酶(ALT)4个项目,计算其偏差、总不精密度及其截距、斜率、非线性、互染率、漂移性,并与各项目对应设定值作比较。结果自建系统:ALT的低值偏差和Glu的中、高值偏差超出允许范围,ALT的低值总不精密度超出允许范围,其余项目的偏差和总不精密度均在允许范围之内。GGT、ALT的非线性、截距和斜率以及Glu的斜率差异有统计学意义,其余项目的截距、斜率、非线性、互染率、漂移性差异均无统计学意义。配套系统:ALT的低值总不精密度超出允许范围,其余项目的偏差和总不精密度均在允许范围之内。GGT的截距和斜率差异有统计学意义,其余项目的截距、斜率、非线性、互染率、漂移性差异均无统计学意义。结论无论是使用自建系统测定AST、GGT、ALT,还是使用配套系统检测AST、Glu、GGT、ALT,偏差都在允许范围内,总不精密度小于美国临床实验室改进法案修正案(CLIA′88)能力验证计划中分析质量要求规定的总允许误差的1/3,互染率较低,稳定性较好。自建系统检测Glu的准确度有待加强改善。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.
文摘目的分别对自建生化检测系统(简称自建系统)和配套生化检测系统(简称配套系统)进行初步性能评价。方法依照美国临床实验室标准化委员会(NCCLS)EP10-A2文件,使用自建系统(OLYMPUS AU400生化分析仪、罗氏cfas校准品及国产试剂)和配套系统(OLYMPUS AU 400生化分析仪、OLYMPUS校准品及OLYMPUS原装试剂)测定天门冬氨酸氨基转移酶(AST)、葡萄糖(Glu)、γ-谷氨酰基转移酶(GGT)、丙氨酸氨基转移酶(ALT)4个项目,计算其偏差、总不精密度及其截距、斜率、非线性、互染率、漂移性,并与各项目对应设定值作比较。结果自建系统:ALT的低值偏差和Glu的中、高值偏差超出允许范围,ALT的低值总不精密度超出允许范围,其余项目的偏差和总不精密度均在允许范围之内。GGT、ALT的非线性、截距和斜率以及Glu的斜率差异有统计学意义,其余项目的截距、斜率、非线性、互染率、漂移性差异均无统计学意义。配套系统:ALT的低值总不精密度超出允许范围,其余项目的偏差和总不精密度均在允许范围之内。GGT的截距和斜率差异有统计学意义,其余项目的截距、斜率、非线性、互染率、漂移性差异均无统计学意义。结论无论是使用自建系统测定AST、GGT、ALT,还是使用配套系统检测AST、Glu、GGT、ALT,偏差都在允许范围内,总不精密度小于美国临床实验室改进法案修正案(CLIA′88)能力验证计划中分析质量要求规定的总允许误差的1/3,互染率较低,稳定性较好。自建系统检测Glu的准确度有待加强改善。
