The present invention provides a fatty acid derivative labelled with a radioactive transition metal which is recognised as an energy substrate in a living body and is metabolized by β-oxidation such that any change in said β-oxidation activity can be detected as a change in the elimination rate of the radioactivity from the body. The fatty acid derivative may be of formula (1),
Q-RCOOH (1)
wherein Q is a chelating group capable of forming a neutral complex with a radioactive transition metal, R is a group of the formula -(CR1R2)n- wherein n is an integer of 4-9; and R1 and R2 are each individually hydrogen or a lower alkyl group, for instance C1-C6 alkyl.
本发明提供了一种用放射性过渡
金属标记的
脂肪酸衍
生物,这种衍
生物在活体内被认为是一种能量底物,并通过β-氧化作用进行代谢,因此所述β-氧化作用活性的任何变化都可作为体内放射性消除率的变化而被检测到。
脂肪酸衍
生物可以是式 (1)、
Q-RCOOH (1)
其中 Q 是能与放射性过渡
金属形成中性络合物的螯合基团,R 是式-(CR1R2)n-的基团,其中 n 是 4-9 的整数;R1 和 R2 分别是氢或低级烷基,例如 C1-C6 烷基。