An improved acetylcholinesterase liquid crystal(LC) biosensor has been developed for the identification of organophosphates(OPs) by using a reactivator. When the acetylcholinesterases(AChEs) inhibited by different kin...An improved acetylcholinesterase liquid crystal(LC) biosensor has been developed for the identification of organophosphates(OPs) by using a reactivator. When the acetylcholinesterases(AChEs) inhibited by different kinds of OPs are reactived by a reactivator, the catalytic activity of AChEs can be recovered with different activation efficiency because of the different phosphorylation structures formed in the inhibited AChEs. Accordingly, the reactived AChEs can catalyze the hydrolysis of acetylthiocholine to generate thiocholine product in different degrees, which will result in different catalytic growth of AuNPs and further form distinct orientational response of LCs. Based on such a reactivation mechanism, the AChE LC biosensor with a simple, rapid and visual procedure achieves an obvious identification of three OPs pesticides, methamidophos, trichlorfon and paraoxon, by using a pralidoxime reactivator.展开更多
目的探讨血必净注射液联合氯解磷定注射液治疗有机磷农药中毒的临床疗效。方法选取2012年3月—2016年3月商丘市第一人民医院收治的有机磷农药中毒患者82例,根据治疗方案的不同分为对照组(36例)和治疗组(46例)。对照组足量应用氯解磷定...目的探讨血必净注射液联合氯解磷定注射液治疗有机磷农药中毒的临床疗效。方法选取2012年3月—2016年3月商丘市第一人民医院收治的有机磷农药中毒患者82例,根据治疗方案的不同分为对照组(36例)和治疗组(46例)。对照组足量应用氯解磷定注射液,用药间隔时间为2~4 h,在胆碱酯酶活力≥60%正常值后停药。治疗组在对照组的基础上静脉滴注血必净注射液,50 m L加入生理盐水100 m L,1次/d。两组患者均持续治疗7 d。观察记录两组患者存活情况、中间综合征和胆碱酯酶恢复时间及肌酸激酶同工酶(CK-MB)和肌钙蛋白T(CTn T)变化。结果治疗后,治疗组死亡病例存活时间显著长于对照组,住院时间显著短于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,治疗组中间综合征发生率和胆碱酯酶恢复正常时间均显著低于对照组,两组比较差异具有统计学意义。治疗后,两组患者CK-MB和CTn T均显著降低,同组比较差异具有统计学意义(P<0.05);且治疗组患者CK-MB和CTn T比对照组更低,两组比较差异具有统计学意义(P<0.05)。结论血必净注射液联合氯解磷定注射液治疗有机磷农药中毒可降低中间综合征发生率和胆碱酯酶恢复正常时间,具有更好的心肌保护作用,具有一定的临床推广应用价值。展开更多
基金supported by the International Scientific and Technological Cooperation Projects of China(2012DFR40480)the National Natural Science Foundation of China(21175037,21277042 and J1210040)
文摘An improved acetylcholinesterase liquid crystal(LC) biosensor has been developed for the identification of organophosphates(OPs) by using a reactivator. When the acetylcholinesterases(AChEs) inhibited by different kinds of OPs are reactived by a reactivator, the catalytic activity of AChEs can be recovered with different activation efficiency because of the different phosphorylation structures formed in the inhibited AChEs. Accordingly, the reactived AChEs can catalyze the hydrolysis of acetylthiocholine to generate thiocholine product in different degrees, which will result in different catalytic growth of AuNPs and further form distinct orientational response of LCs. Based on such a reactivation mechanism, the AChE LC biosensor with a simple, rapid and visual procedure achieves an obvious identification of three OPs pesticides, methamidophos, trichlorfon and paraoxon, by using a pralidoxime reactivator.
文摘目的探讨血必净注射液联合氯解磷定注射液治疗有机磷农药中毒的临床疗效。方法选取2012年3月—2016年3月商丘市第一人民医院收治的有机磷农药中毒患者82例,根据治疗方案的不同分为对照组(36例)和治疗组(46例)。对照组足量应用氯解磷定注射液,用药间隔时间为2~4 h,在胆碱酯酶活力≥60%正常值后停药。治疗组在对照组的基础上静脉滴注血必净注射液,50 m L加入生理盐水100 m L,1次/d。两组患者均持续治疗7 d。观察记录两组患者存活情况、中间综合征和胆碱酯酶恢复时间及肌酸激酶同工酶(CK-MB)和肌钙蛋白T(CTn T)变化。结果治疗后,治疗组死亡病例存活时间显著长于对照组,住院时间显著短于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,治疗组中间综合征发生率和胆碱酯酶恢复正常时间均显著低于对照组,两组比较差异具有统计学意义。治疗后,两组患者CK-MB和CTn T均显著降低,同组比较差异具有统计学意义(P<0.05);且治疗组患者CK-MB和CTn T比对照组更低,两组比较差异具有统计学意义(P<0.05)。结论血必净注射液联合氯解磷定注射液治疗有机磷农药中毒可降低中间综合征发生率和胆碱酯酶恢复正常时间,具有更好的心肌保护作用,具有一定的临床推广应用价值。
