代谢
利奈唑胺主要代谢为两种无活性代谢物:一种是氨基酸乙氧基醋酸代谢物(PNU-142300)和一种羟基乙基甘氨酸代谢物(PNU-142586),两者都是吗啉环氧化的结果。其中,羟基乙基甘氨酸代谢物是这两种代谢物中含量最丰富的一种,可能是通过非酶促过程生成的,尽管进一步的细节尚未阐明。尽管利奈唑胺的具体生物转化酶尚不清楚,但它似乎不受CYP450酶系统的代谢影响,也不会显著抑制或诱导这些酶。然而,利奈唑胺是一种可逆的非选择性单胺氧化酶抑制剂。
Linezolid is primarily metabolized to two inactive metabolites: an aminoethoxyacetic acid metabolite (PNU-142300) and a hydroxyethyl glycine metabolite (PNU-142586), both of which are the result of morpholine ring oxidation. The hydroxyethyl glycine metabolite - the most abundant of the two metabolites - is likely generated via non-enzymatic processes, though further detail has not been elucidated. While the specific enzymes responsible for the biotransformation of linezolid are unclear, it does not appear to be subject to metabolism via the CYP450 enzyme system, nor does it meaningfully inhibit or induce these enzymes. Linezolid is, however, a reversible and non-selective inhibitor of monoamine oxidase enzymes.
来源:DrugBank