代谢
甲氧基锡的药代动力学特性使其被认为是一种前药,因为它的生物转化非常迅速。这种药物在血浆和组织中被伪胆碱酯酶迅速水解,产生主要代谢物去乙酰氧基-甲氧基胺。这个初级代谢物随后被细胞色素P450单加氧酶系统去甲基化,形成去乙酰-去甲基-甲氧基胺。这两个主要代谢物都具有药理活性。尿和粪便中甲氧基锡的药代动力学研究显示存在8种不同的代谢物,其中两种极性很高,对酶促水解有抵抗力。从这些代谢物中,已经检测到了主要代谢物的硫酸盐和葡萄糖苷酸共轭物。
The pharmacokinetic profile of moxisylyte can make this drug to be considered as a prodrug as its biotransformation is very rapid. This drug gets rapidly hydrolyzed by pseudocholinesterase in plasma and tissues to give the major metabolite deacetyl-thymoxamine. This first metabolite is later demethylated by the cytochrome P450 monooxygenase system to form deacetyl-demethyl-thymoxamine. Both of this major metabolites are pharmacologically active. The pharmacokinetic studies with moxisylyte in urine and feces have shown the presence of 8 different metabolites, where two of them are highly polar and resistant to enzymatic hydrolysis. From this metabolites, it has been detected the sulfate and glucuronide conjugates of the major metabolites.
来源:DrugBank