牛磺酸与大鼠脑发育关系的研究

TAURINE AND BRAIN DEVELOPMENT

将断乳大鼠随机分成两组,(Ⅰ)补充(0.6％)牛磺酸组,(Ⅱ)对照组。从大鼠的行为、大脑发育及人体细胞体外培养三个方面对牛磺酸与大鼠脑发育的关系及其机制进行了探讨。结果表明:①补充牛磺酸组大鼠在学习、记忆等方面均显著优于对照组大鼠(P<0.01)。②补充组大鼠在脑重量上显著优于对照组大鼠(P<0.05)。③补充组大鼠大脑中游离牛磺酸、锌、铜、铁及其它16种游离氨基酸含量显著高于对照组大鼠(P<0.01)。④牛磺酸具有促进细胞代谢活性的作用,牛磺酸与锌的复合效应具有抑制细胞代谢活性的作用。推测:牛磺酸-锌/牛磺酸具有细胞代谢活性调节因子的作用。在细胞水平上牛磺酸可促进细胞的增殖活性,在整体水平上表现为补充牛磺酸大鼠在脑重量上显著高于对照组;在行为上则表现为补充组大鼠在学习、记忆能力上的提高。由此认为牛磺酸具有促进大脑发育的作用。

Weanling rats were divided randomly into two groups: taurine (0.6%) Supplemented group (ST) and taurine-free group (TF) . The water maze was used to measure the effect of the taurine on the ability of learning and remembrance of the rats. Cell culture method was used to investigate the effect of taurine and zinc on fibrocellular proliferation. The results indicated that the ability of learning and remembrance of ST rats were significantly higher than that of the TF rats. The rats of ST group had significantly higher weight of whole brain, cerebral and cerebellum, cerebral zinc, copper, iron and free animo acids than those of the TF. The results of cell culture tests showed that fibroblast could grow very well in 10% calf serum medium even taurine was not added to the medium. However, they would not grow as well as when low level taurine was added.The response was a dose-dependent manner, reaching the maximum at 800μM. But cells viability decreases to 80% of the controls at 51mM taurine. Nevertheless, if a combination of tau-rine and zinc was added, there was a striking inhibitive effect on cell proliferation and showed dose-dependent manner. These results suggest that taur-ine-Zn/taurine might act as a regulator in human cell proliferation.From the above results, it is suggested that taurine may play an important role in brain development.