The present study was conducted with the objective of further developing the cholinergic hypothesis and not using the prevalent amyloid beta plaque hypothesis or the tau protein hypothesis on dementia. The experiment ...The present study was conducted with the objective of further developing the cholinergic hypothesis and not using the prevalent amyloid beta plaque hypothesis or the tau protein hypothesis on dementia. The experiment was conducted on mice using anticholinergic drugs scopolamine and biperiden to investigate the root cause of dementia. First, we measured the mice serum for liquid chromatography-tandem mass spectrometry (LC-MS/MS) after administration of scopolamine and biperiden and found an accumulation of anticholinergic drugs metabolites in the body. The Y-maze test and measurement of LC-MS/MS in the cranial skeletal muscle cells showed that the Scopolamine metabolites have a significant effect on the cranial skeletal muscles, leading to the conclusion that Methocarbamol is an effective treatment for dementia.展开更多
目的研究星型硅微针阵列对于不同油水分配系数化学药物的体外透皮传递的影响。方法采用深反应离子刻蚀技术(deep reactive ion ething,DRIE)制备硅微针阵列;选择吲哚美辛(indomethacin,IMC)、酮洛芬(ketoprofen,KTP)、美索巴莫(methocar...目的研究星型硅微针阵列对于不同油水分配系数化学药物的体外透皮传递的影响。方法采用深反应离子刻蚀技术(deep reactive ion ething,DRIE)制备硅微针阵列;选择吲哚美辛(indomethacin,IMC)、酮洛芬(ketoprofen,KTP)、美索巴莫(methocarbamol,MCM)、更昔洛韦(ganciclovir,GCV)为模型药物,对4种化学药物经微针穿刺小鼠腹部皮肤后的体外透皮特性进行比较研究。结果星型微针阵列为0.5 cm×0.5 cm,100根微针,针长200μm,成五角星型柱状结构;IMC,KTP,MCM,GCV经微针处理皮肤5 min较未处理皮肤的渗透速率分别增加4.05,4.77,6.06,12.49倍,表明硅微针对4种模型药物有明显的促透作用;实验结果显示,药物透皮传递随微针穿刺皮肤时间的延长而增强;随药物logP值降低,经微针处理皮肤的促透效果更加显著,但微针阵列经皮促透作用低于皮肤去角质处理的促透效果。结论星型硅微针阵列对水溶性药物的促透效果较脂溶性药物更加显著。将微针与其他透皮技术相结合,具有广阔的研究前景。展开更多
文摘The present study was conducted with the objective of further developing the cholinergic hypothesis and not using the prevalent amyloid beta plaque hypothesis or the tau protein hypothesis on dementia. The experiment was conducted on mice using anticholinergic drugs scopolamine and biperiden to investigate the root cause of dementia. First, we measured the mice serum for liquid chromatography-tandem mass spectrometry (LC-MS/MS) after administration of scopolamine and biperiden and found an accumulation of anticholinergic drugs metabolites in the body. The Y-maze test and measurement of LC-MS/MS in the cranial skeletal muscle cells showed that the Scopolamine metabolites have a significant effect on the cranial skeletal muscles, leading to the conclusion that Methocarbamol is an effective treatment for dementia.