作者观察9-四氢大麻酚(9-THC)的镇痛作用及对电针镇痛的影响。实验用钾离子测痛法,分别给家兔g-THC iv 0.1Mg/kg、0.25mg/kg、0.5mg/kg和1mg/kg后,镇痛作用逐步增加。0.1 mg/kg9-THC iv与电针联合使用后镇痛作用可以得到加强,此时脑脊液...作者观察9-四氢大麻酚(9-THC)的镇痛作用及对电针镇痛的影响。实验用钾离子测痛法,分别给家兔g-THC iv 0.1Mg/kg、0.25mg/kg、0.5mg/kg和1mg/kg后,镇痛作用逐步增加。0.1 mg/kg9-THC iv与电针联合使用后镇痛作用可以得到加强,此时脑脊液(CSF)中亮啡肽样免疫活性物质(LEK-LIS)显著高于单给电针或⊿9-THC,提示:⊿9-THC增强电针的镇痛作用可能与脑内阿片样物质释放有关。展开更多
Marijuana use as well as abuse is a significant public health and public safety concern in the United States and using hair to identify marijuana users and abusers has been gaining acceptance in a number of venues inc...Marijuana use as well as abuse is a significant public health and public safety concern in the United States and using hair to identify marijuana users and abusers has been gaining acceptance in a number of venues including workplace, court ordered, and substance abuse treatment monitoring. After the presentation of a fully validated 2-dimensional gas chromatography-tandem mass spectrometry method for the detection of 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THCA), the chief metabolite of the main psychoactive compound in marijuana, Δ9-tetrahydrocannabinol (THC), we evaluated the usefulness of fingernail clippings as an alternative specimen type to hair by the analysis of a set of 60 matched pairs of head hair and fingernail clippings. The limit of detection was 10 fg/mg, the limit of quantitation was 20 fg/mg, and the assay was linear from 20 fg/mg to 500 fg/mg. The intra- and inter-assay imprecision and bias studies at 4 different concentrations (50, 100, 500, and 1000 fg/mg) were acceptable where all % Target observations were within 16% of their expected concentrations and all %CV calculations were less than 13.5%. THCA was detectable in more fingernail specimens (53.3%) than hair specimens (46.7%) and the mean concentrations in nails were on average 4.9 times higher than in hair (1813 fg/mg and 364 fg/mg, respectively). The THCA concentrations in hair and nail were strongly associated (r = 0.974, P < 0.01, n = 60) and the association was significant. The study demonstrated that fingernail clippings are a suitable alternative specimen type to hair to monitor for marijuana use and abuse.展开更多
文摘作者观察9-四氢大麻酚(9-THC)的镇痛作用及对电针镇痛的影响。实验用钾离子测痛法,分别给家兔g-THC iv 0.1Mg/kg、0.25mg/kg、0.5mg/kg和1mg/kg后,镇痛作用逐步增加。0.1 mg/kg9-THC iv与电针联合使用后镇痛作用可以得到加强,此时脑脊液(CSF)中亮啡肽样免疫活性物质(LEK-LIS)显著高于单给电针或⊿9-THC,提示:⊿9-THC增强电针的镇痛作用可能与脑内阿片样物质释放有关。
文摘Marijuana use as well as abuse is a significant public health and public safety concern in the United States and using hair to identify marijuana users and abusers has been gaining acceptance in a number of venues including workplace, court ordered, and substance abuse treatment monitoring. After the presentation of a fully validated 2-dimensional gas chromatography-tandem mass spectrometry method for the detection of 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THCA), the chief metabolite of the main psychoactive compound in marijuana, Δ9-tetrahydrocannabinol (THC), we evaluated the usefulness of fingernail clippings as an alternative specimen type to hair by the analysis of a set of 60 matched pairs of head hair and fingernail clippings. The limit of detection was 10 fg/mg, the limit of quantitation was 20 fg/mg, and the assay was linear from 20 fg/mg to 500 fg/mg. The intra- and inter-assay imprecision and bias studies at 4 different concentrations (50, 100, 500, and 1000 fg/mg) were acceptable where all % Target observations were within 16% of their expected concentrations and all %CV calculations were less than 13.5%. THCA was detectable in more fingernail specimens (53.3%) than hair specimens (46.7%) and the mean concentrations in nails were on average 4.9 times higher than in hair (1813 fg/mg and 364 fg/mg, respectively). The THCA concentrations in hair and nail were strongly associated (r = 0.974, P < 0.01, n = 60) and the association was significant. The study demonstrated that fingernail clippings are a suitable alternative specimen type to hair to monitor for marijuana use and abuse.
