Potentiating Effects of .BETA.-Eudesmol-Related Cyclohexylidene Derivatives on Succinylcholine-Induced Neuromuscular Block in Isolated Phrenic Nerve-Diaphragm Muscles of Normal and Alloxan-Diabetic Mice.
作者:Masayasu KIMURA、Prakash DIWAN、Seiji YANAGI、Yasuo KONNO、Hiroshi NOJIMA、Ikuko KIMURA
DOI:10.1248/bpb.18.407
日期:——
β-Eudesmol, a sesquiterpenoid alcohol contained in Atractylodes lancea, potentiates succinylcholine (SuCh)-induced neuromuscular blockade. The potentiating effect is greater in diabetic muscles than in normal ones. As a ligand for affinity chromatography to study the potentiating mechanism, we designed and synthesized newly β-eudesmol-related cyclohexylidene derivatives (2-(3-hydroxy-3-methylbutyl) cyclohexylidene ; KTE-13, 2-(3-hydroxy-3-methylbutyl)-4-cyclohexylidene carboxylic acid ; KTE-32 and 4-tert-butoxycarbonyl-2-(3-hydroxy-3-methylbutyl) cyclohexylidene ; KTE-33). We examined the potentiating effects of those compounds in phrenic nerve-diaphragm muscle preparations of normal and alloxan-diabetic mice. KTE-33 (100μM) potentiated more greatly SuCh-induced neuromuscular blockade in diabetic muscles than in normal ones (the potentiating ratios in normal and diabetic muscles were 6.7 and 10.6, respectively), while KTE-13 (100 μM) and -32 (200 μM) potentiated weakly. These results suggest that the ester group in KTE-33 rather than a carboxyl group in KTE-32 is important in inducing the potentiation of SuCh-induced neuromuscular blockade in diabetic state.
白术中含有的倍半萜醇β-Eudesmol能增强琥珀胆碱(SuCh)诱导的神经肌肉阻滞作用。与正常肌肉相比,糖尿病肌肉的增效作用更大。作为研究其增效机制的亲和层析配体,我们设计并合成了新的β-桉叶油醇相关环己亚基衍生物(2-(3-羟基-3-甲基丁基)环己亚基.KTE-13、2-(3-羟基-3-甲基丁基)环己亚基.KTE-13、2-(3-羟基-3-甲基丁基)环己亚基.KTE-13);KTE-13、2-(3-羟基-3-甲基丁基)-4-环己亚基羧酸;KTE-32 和 4-叔丁氧羰基-2-(3-羟基-3-甲基丁基)环己亚基;KTE-33)。我们研究了这些化合物在正常小鼠和阿脲糖尿病小鼠膈神经-膈肌制备物中的增效作用。与正常肌肉相比,KTE-33(100 μM)对糖尿病肌肉中苏合香诱导的神经肌肉阻滞的增效作用更大(正常肌肉和糖尿病肌肉中的增效比分别为 6.7 和 10.6),而 KTE-13 (100 μM)和 -32 (200 μM)的增效作用较弱。这些结果表明,KTE-33 中的酯基而不是 KTE-32 中的羧基是诱导糖尿病状态下 SuCh 诱导的神经肌肉阻滞增效的重要因素。