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1.中国科学院上海原子核研究所
2.上海第二医科大学附属瑞金医院
收稿日期:1989-07-31,
纸质出版日期:1990-11-01
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俞斌伟, 张年宝, 谢炳华, 等. L-脯-L-亮-甘氨酰胺(PLG)的离子束氚标记及其在鼠脑内的分布[J]. 核技术, 1990,13(11):689-692.
Binwei Yu, Nianbao Zhang, Binghua Xie, et al. Ion beam tritium labelling of L-prolyl-L-leucyl-glycinamide and its distribution in rat brain[J]. Nuclear techniques, 1990, 13(11): 689-692.
本文用离子束氚标记技术制得氚标记PLG。经硅胶纸层析法纯化,氚化三肽的比活度为0.81GBq/mmol,放化纯度
>
95%,具有完全的生物活性。由腹腔注射
3
H-PLG,直接测定大鼠脑内部分组织的放射性分布,提示用药4.5h后,垂体、纹状体有较高的放射性,而下丘脑和中脑的放射性较低。
Tritium labelled L-prolyl-L-leucyl-glycinamide (
3
H-PLG) was prepared by ion beam method and purified by thin-layer chromatogrphy. After removal of all tritum the tritiated tripeptide was obtained with a specific radioactivity of 0.81-1.92GBq/mmol. The radiochemical purity was over 95% and biological activity remained unchanged. The distribution of radioactivity after intraperitoneal injection of
3
H-PLG has been studied by direct measurement of radioactivity in different parts brain. The uptake of radioactivity was high in pituitary and striatum and was low in hypothalamus and midbrain.
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