碘缺乏对脑发育期大鼠大、小脑~3H-亮氨酸掺入的影响

本文介绍~3H-亮氨酸掺入碘缺乏仔鼠脑组织的实验情况。实验组动物为饲以碘缺乏地区的粮食和水的母鼠所产的仔鼠;对照组动物为饲以补充碘的饲料的母鼠所产的仔鼠。 实验结果为,11日龄仔鼠在注入~H-亮氨酸1—14小时后,实验组每毫克大、小脑组织中的掺入量(dmp)均明显低于对照组(p<0.001);而生后不同日龄(1—30天)的仔鼠,注入~3H-亮氨酸4小时后的dmp,亦是实验组低于对照组(P<0.05),表明碘缺乏可影响仔鼠脑组织蛋白质的合成及脑组织的发育。

THE EFFECT OF IODINE DEFICIENCY ON ~3H-LEUCINE INCORPORATION INTO CEREBRUM AND CEREBELLUM DURING DEVELOPMENT OF THE BRAIN

The study was made on 3H-leucine incorporation into brain of offsprings born by their mothers who were fed in severe iodine deficiency area. Control group received an iodine-supplemented diet (1.7mg KIO3/kg food). Disintegration per minute (dpm) was used as an index to assess the 3H-leu-cine incorporation rate in comparision of the two groups.The results of 3H-leucine incorporation into brain showed that the dpm/mg of brain cortex and cerebellum was significantly lower in experimental group than that of control group at the time of 1-14 hours after injection of the preparation on 11-day offsprings (p<0.001) and at 4 hours after its injection on 1-30 day offsprings (p<0.05). However, it seemed to have some tendency for the experimental group to catch up with the control group's incorporation after 20-30 days of the offsprings.The results were suggested that iodine deficiency could affect the synthesis of protein in brain, and iodine might play an important nutritive role in the development of brain.