益智复方对D-半乳糖诱导的小鼠学习记忆障碍的影响(英文)

Effects of compound Yi-Zhi on D-galactose-induced learning and memory deficits in mice1

目的 :研究益智复方对痴呆小鼠学习记忆及自由基代谢的影响。方法 :小鼠每日颈背部皮下注射D 半乳糖 0 .15 0g·kg-1,连续 4 5d可以造成痴呆模型。在注射半乳糖 5d后 ,同时灌胃给予不同剂量的YZC至造模结束 ,再采用Y型迷宫测验及SOD、MDA检验试剂盒分别查看其对痴呆小鼠学习记忆及自由基代谢的影响。结果 :益智复方可以显著提高痴呆小鼠Y型迷宫学习 记忆成绩 (所需的训练次数由模型组的 31.35± 8.97 17.12± 5 .5 7降低到低中高三个剂量组的 19.67± 8.0 7 11.2 7± 6.65、14.0 0± 6.84 8.2 9± 5 .95和 11.4 1± 5 .99 6.2 4±4 .97) ;益智复方 0 .10 8g·kg-1和 0 .4 33g·kg-1均可显著提高小鼠脑组织SOD活性 ,从 17.69± 3.14nU·mg-1pro升高到 2 6.94± 4 .4 6nU·mg-1pro和2 1.33± 3.63nU·mg-1pro ;而益智复方 0 .10 8g·kg-1、0 .2 17g·kg-1和 0 .4 33g·kg-1使小鼠大脑中丙二醛 (MDA)水平由 4 .0 8± 0 .88nmol·mg-1pro减少到 2 .82± 0 .75nmol·mg-1pro、 2 .10± 0 .4 2nmol·mg-1pro和 2 .35± 0 .39nmol·mg-1pro。结论 :益智复方具有较好的改善学习记忆功能 ,这可能与其清除脑内自由基、抑制脂质过氧化的作用有联系。

AIM: To explore the effects of Compound Yi-Zhi (YZC) on learning and memory capacity and free radical metabolism in D-galactose induced mice dementia model. METHODS: The mice dementia model was induced by a daily D-galactose 0.15 g·kg -1 sc for 45 d and after 5 d D-galactose injection, the mice were treated with three doses of YZC once a day for 40 d. In order to find out the influence of YZC on the models learning and memory capability and free radical metabolism system, Y-maze test was introduced for the former and superoxide dismutase (SOD) and malondialdehyde (MDA) tests for the latter. RESULTS: Compared with the D-galactose model group, three doses of YZC administration ( 0.108, 0.217, 0.433 g·kg -1) were all shown to significantly reduced the times of learning/memory in Y-maze test from 31.35± 8.97/ 17.12± 5.57 to 19.67± 8.07/ 11.27± 6.65, to 14.00± 6.84/ 8.29± 5.95, and to 11.41± 5.99/ 6.24± 4.97, respectively. For SOD, the administrations of 0.108 and 0.433 g·kg -1 YZC could increase the activity of SOD from 17.69± 3.14 to 26.94± 4.46, and to 21.33± 3.63 nU·mg -1 pro. While for MDA, all the three doses of YZC could decrease the level of MDA from 4.08± 0.88 to 2.82± 0.75, to 2.10± 0.42, and to 2.35± 0.39 nmol·mg -1 pro in the mice brain tissue, respectively. CONCLUSION: YZC can improve the D-galactose induced learning and memory dysfunction, and the action may be related to the improvement of antioxidase activity in the model mice brains.