Heby O, Sauter S, Russell D H
Biochem J. 1973 Dec;136(4):1121-4. doi: 10.1042/bj1361121.
Administration of methylglyoxal bis(guanylhydrazone) to leukaemic mice results in an early depression followed by a marked elevation of S-adenosyl-l-methionine decarboxylase activity. Further, there is an early prolonged increase in the activity of ornithine decarboxylase, the initial enzyme in the polyamine biosynthetic pathway. Because of the profound effects of methylglyoxal bis(guanylhydrazone) in vivo on the polyamine biosynthetic pathway, the drug can no longer be considered a specific inhibitor of spermidine synthesis.
给白血病小鼠施用甲基乙二醛双(脒腙)会导致早期活性降低,随后S-腺苷-L-甲硫氨酸脱羧酶活性显著升高。此外,鸟氨酸脱羧酶(多胺生物合成途径中的初始酶)的活性会早期持续增加。由于甲基乙二醛双(脒腙)在体内对多胺生物合成途径有深远影响,该药物不能再被视为亚精胺合成的特异性抑制剂。