Metabolite of 4-Amino-4-deoxy-N10-methylpteroylglutamic Acid (Methotrexate)

Metabolite of 4-Amino-4-deoxy-N10-methylpteroylglutamic Acid (Methotrexate)
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4-氨基-4-脱氧-N10-甲基蝶酰谷氨酸(甲氨蝶呤)的代谢物

DOI:
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发表时间:
1967
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影响因子:
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通讯作者:
Ti Li Loo
Ti Li Loo
中科院分区:
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文献类型:
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作者:
David G. Johns;Ti Li Loo

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4-氨基-4-脱氧-N 10 -甲基蝶酰谷氨酸(甲氨蝶呤;MTX)被兔肝醛氧化酶快速代谢。 MTX 代谢物用高锰酸盐氧化裂解,产生简单的蝶啶,其具有 2,4-二氨基-7-羟基-6-蝶啶甲酸的分光光度和色谱特性。后者在70℃下碱性水解,缓慢转化为2-氨基-4,7-二羟基-6-蝶啶甲酸。 MTX 代谢物的非蝶啶部分与 MTX 的非蝶啶部分相同。 MTX 代谢物的生物学特性与蝶酰谷氨酸的 2,4-二氨基衍生物的生物学特性相容。鉴于这些发现,建议MTX代谢物的结构为4-氨基-4-脱氧-7-羟基-N 10 -甲基蝶酰谷氨酸(7-羟基-MTX)。
4-Amino-4-deoxy-N 10 -methylpteroylglutamic acid (methotrexate; MTX) is rapidly metabolized by rabbit liver aldehyde oxidase. The MTX metabolite, on oxidative cleavage with permanganate, yields a simple pteridine having the spectrophotometric and chromatographic properties of 2,4-diamino-7-hydroxy-6-pteridinecarboxylic acid. Alkaline hydrolysis of the latter at 70° slowly converts it to 2-amino-4,7-dihydroxy-6-pteridinecarboxylic acid. The nonpteridine moiety of the MTX metabolite is identical with the nonpteridine moiety of MTX. The biological properties of the MTX metabolite are compatible with those of a 2,4-diamino derivative of pteroylglutamate. In view of these findings, the structure, 4-amino-4-deoxy-7-hydroxy-N 10 -methylpteroylglutamic acid (7-hydroxy-MTX), is proposed for the MTX metabolite.