目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(...目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(10ml·kg-1,ip)、MA给药组(2mg·kg-1,ip)、氯胺酮给药组(15mg·kg-1,ip)、MA与氯胺酮合用组(MA2mg·kg-1,ip;氯胺酮15mg·kg-1,ip,提前30min注射)。采用倾向性训练程序训练小鼠,训练8d,隔天进行药物匹配训练,隔天生理盐水训练。停药24d后,氯胺酮组和两药合用组位置偏爱消失后,d25采用训练期时所用药物一半的剂量进行激发。分别记录15min之内小鼠各阶段在伴药侧停留的时间。结果MA或氯胺酮单独使用以及两者联合给药均可使小鼠出现CPP。氯胺酮的CPP效应维持时间较短,停药d9已消失,同时可抑制MA的CPP持续时间,两组再次激发均不重现。MA组小鼠位置偏爱在停药后25d里并未消失,激发后可使该效应显著增强。结论氯胺酮也是一种能够促使小鼠产生位置偏爱的药物,停药后短期内可增强MA引起位置偏爱的强度,但可抑制CPP的维持时间,同时抑制MA再激发后CPP重现。展开更多
Objective： To observe the effects of water extract of Zuojin Pill （左金丸, ZJP） on inhibiting the growth of human gastric cancer cell line SGC-7901 and its potential mechanism. Methods： Effects of ZJP on SGC-7901 ...Objective： To observe the effects of water extract of Zuojin Pill （左金丸, ZJP） on inhibiting the growth of human gastric cancer cell line SGC-7901 and its potential mechanism. Methods： Effects of ZJP on SGC-7901 cells growth were determined by 3-（4,5-dimethyl-2-thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide （MTT） assay, cell apoptosis and cell cycle were determined by flow cytornetry, and apoptosis induction was detected by means of DNA gel electrophoresis. The cellular mechanism of drug-induced cell death was unraveled by assaying oxidative injury level of SGC-7901 cell, mitochondrial membrane potentials, expression of apoptosis-related genes, such as B cell lymphoma/lewkmia-2 （Bcl-2）, Bcl-2 associated X protein （Bax） and cleaved caspase-3 and caspase-9. Results： ZJP exerted evident inhibitory effect on SGC-7901 cells by activating production of reactive oxygen species and elevating Bax/Bcl-2 ratio in SGC-7901 cells, leading to attenuation of mitochondrial membrane potential and DNA fragmentation. Conclusions： ZJP inhibits the cancer cell growth via activating mitochondria-dependent apoptosis pathway. ZJP can potentially serve as an antitumor agent.展开更多
文摘目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(10ml·kg-1,ip)、MA给药组(2mg·kg-1,ip)、氯胺酮给药组(15mg·kg-1,ip)、MA与氯胺酮合用组(MA2mg·kg-1,ip;氯胺酮15mg·kg-1,ip,提前30min注射)。采用倾向性训练程序训练小鼠,训练8d,隔天进行药物匹配训练,隔天生理盐水训练。停药24d后,氯胺酮组和两药合用组位置偏爱消失后,d25采用训练期时所用药物一半的剂量进行激发。分别记录15min之内小鼠各阶段在伴药侧停留的时间。结果MA或氯胺酮单独使用以及两者联合给药均可使小鼠出现CPP。氯胺酮的CPP效应维持时间较短,停药d9已消失,同时可抑制MA的CPP持续时间,两组再次激发均不重现。MA组小鼠位置偏爱在停药后25d里并未消失,激发后可使该效应显著增强。结论氯胺酮也是一种能够促使小鼠产生位置偏爱的药物,停药后短期内可增强MA引起位置偏爱的强度,但可抑制CPP的维持时间,同时抑制MA再激发后CPP重现。
基金Supported by the China Postdoctoral Science Foundation(No.2014M560666)
文摘Objective： To observe the effects of water extract of Zuojin Pill （左金丸, ZJP） on inhibiting the growth of human gastric cancer cell line SGC-7901 and its potential mechanism. Methods： Effects of ZJP on SGC-7901 cells growth were determined by 3-（4,5-dimethyl-2-thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide （MTT） assay, cell apoptosis and cell cycle were determined by flow cytornetry, and apoptosis induction was detected by means of DNA gel electrophoresis. The cellular mechanism of drug-induced cell death was unraveled by assaying oxidative injury level of SGC-7901 cell, mitochondrial membrane potentials, expression of apoptosis-related genes, such as B cell lymphoma/lewkmia-2 （Bcl-2）, Bcl-2 associated X protein （Bax） and cleaved caspase-3 and caspase-9. Results： ZJP exerted evident inhibitory effect on SGC-7901 cells by activating production of reactive oxygen species and elevating Bax/Bcl-2 ratio in SGC-7901 cells, leading to attenuation of mitochondrial membrane potential and DNA fragmentation. Conclusions： ZJP inhibits the cancer cell growth via activating mitochondria-dependent apoptosis pathway. ZJP can potentially serve as an antitumor agent.
