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Effects of Nanoparticle and Conventional-Size Suspensions of MgO and ZnO on Recognition Memory in Mice
Neurophysiology ( IF 0.6 ) Pub Date : 2020-01-01 , DOI: 10.1007/s11062-020-09847-4
M. Kesmati , M. Torabi , N. Pourreza , R. Abdollahzadeh , R. Rahiminezhadseta , M. B. Banitorof

We examined the effects of nano forms of magnesium oxide (nano-MgO) and zinc oxide (nano-ZnO) on recognition memory in mice and also the levels of Mg 2+ and Zn 2+ ions in the blood serum and cerebral tissue of the animals. Adult male NMRI mice were divided into control groups and those treated with suspensions of the above nano- and also conventional forms of the above oxides (1 and 5 mg/kg). The components were injected i.p. once in the test day or three times during the training days. The novel object recognition test was used for evaluating the memory. The levels of Mg 2+ and Zn 2+ were measured in the serum and brain hemispheres of animals at the end of the test. Nano-MgO (5 mg/kg) improved recognition memory more markedly than conv-MgO injection on the test day and during the training sessions, with increasing Mg 2+ levels in the brain hemispheres. Nano- and conv-ZnO increased recognition memory only at administration in the test day, while the Zn 2+ level in the brain hemispheres significantly increased in the presence of all doses of conv-ZnO and nano-ZnO injected in the test day and during the training session. In the serum, the Zn 2+ concentration significantly increased after injections of conv-ZnO or nano-ZnO (1 and 5 mg/kg) in comparison with that in the saline group injected in the test day. Thus, the ability of nano-MgO and nano-ZnO to increase the levels of Mg 2+ and Zn 2+ in the brain hemispheres is greater than that of their conventional forms, and this factor may affect results of the recognition memory test.

中文翻译:

纳米颗粒和常规尺寸的 MgO 和 ZnO 悬浮液对小鼠识别记忆的影响

我们研究了纳米形式的氧化镁 (nano-MgO) 和氧化锌 (nano-ZnO) 对小鼠识别记忆的影响,以及小鼠血清和脑组织中 Mg 2+ 和 Zn 2+ 离子的水平。动物。成年雄性 NMRI 小鼠被分为对照组和用上述纳米和常规形式的上述氧化物(1 和 5 毫克/千克)的悬浮液处理的那些。在测试日或训练日期间 ip 注射一次成分。新的物体识别测试用于评估记忆。在测试结束时测量动物血清和脑半球中的Mg 2+ 和Zn 2+ 水平。Nano-MgO (5 mg/kg) 在测试日和训练期间比 conv-MgO 注射更显着地改善了识别记忆,随着大脑半球中 Mg 2+ 水平的增加。Nano-ZnO 和 conv-ZnO 仅在测试日给药时增加识别记忆,而在测试日和期间注射所有剂量的 conv-ZnO 和 nano-ZnO 时,大脑半球中的 Zn 2+ 水平显着增加培训课程。在血清中,与试验日注射的盐水组相比,注射 conv-ZnO 或纳米 ZnO(1 和 5 mg/kg)后 Zn 2+ 浓度显着增加。因此,纳米MgO和纳米ZnO提高大脑半球中Mg 2+ 和Zn 2+ 水平的能力大于其常规形式,并且该因素可能影响识别记忆测试的结果。而在测试日和训练期间注射所有剂量的 conv-ZnO 和纳米 ZnO 的情况下,大脑半球中的 Zn 2+ 水平显着增加。在血清中,与试验日注射的盐水组相比,注射 conv-ZnO 或纳米 ZnO(1 和 5 mg/kg)后 Zn 2+ 浓度显着增加。因此,纳米MgO和纳米ZnO提高大脑半球中Mg 2+ 和Zn 2+ 水平的能力大于它们的常规形式,并且该因素可能影响识别记忆测试的结果。而在测试日和训练期间注射所有剂量的 conv-ZnO 和纳米 ZnO 的情况下,大脑半球中的 Zn 2+ 水平显着增加。在血清中,与试验日注射的盐水组相比,注射 conv-ZnO 或纳米 ZnO(1 和 5 mg/kg)后 Zn 2+ 浓度显着增加。因此,纳米MgO和纳米ZnO提高大脑半球中Mg 2+ 和Zn 2+ 水平的能力大于其常规形式,并且该因素可能影响识别记忆测试的结果。与试验日注射的盐水组相比,注射conv-ZnO或纳米ZnO(1和5mg/kg)后Zn 2+ 浓度显着增加。因此,纳米MgO和纳米ZnO提高大脑半球中Mg 2+ 和Zn 2+ 水平的能力大于其常规形式,并且该因素可能影响识别记忆测试的结果。与试验日注射的盐水组相比,注射conv-ZnO或纳米ZnO(1和5mg/kg)后Zn 2+ 浓度显着增加。因此,纳米MgO和纳米ZnO提高大脑半球中Mg 2+ 和Zn 2+ 水平的能力大于其常规形式,并且该因素可能影响识别记忆测试的结果。
更新日期:2020-01-01
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