Neuroglial Plasticity Laboratory, Postgraduate Programme of Biochemistry, Department of Biochemistry, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2600 Anexo-Bairro Santa Cecilia, Porto Alegre, RS, 90035-003, Brazil.
Eur Arch Psychiatry Clin Neurosci. 2010 Sep;260(6):475-81. doi: 10.1007/s00406-009-0095-0. Epub 2009 Dec 30.
Although classical and atypical antipsychotics may have different neurotoxic effects, their underlying mechanisms remain to be elucidated, especially regarding neuroglial function. In the present study, we compared the atypical antipsychotic risperidone (0.01-10 μM) with the typical antipsychotic haloperidol (0.01-10 μM) regarding different aspects such as glutamate uptake, glutamine synthetase (GS) activity, glutathione (GSH) content, and intracellular reactive oxygen species (ROS) production in C6 astroglial cells. Risperidone significantly increased glutamate uptake (up to 27%), GS activity (14%), and GSH content (up to 17%). In contrast, haloperidol was not able to change any of these glial functions. However, at concentration of 10 μM, haloperidol increased (12%) ROS production. Our data contribute to the clarification of different hypothesis concerning the putative neural responses after stimulus with different antipsychotics, and may establish important insights about how brain rewiring could be enhanced.
虽然经典和非典型抗精神病药可能具有不同的神经毒性作用,但它们的潜在机制仍有待阐明,特别是关于神经胶质功能。在本研究中,我们比较了非典型抗精神病药利培酮(0.01-10 μM)与典型抗精神病药氟哌啶醇(0.01-10 μM)在谷氨酸摄取、谷氨酰胺合成酶(GS)活性、谷胱甘肽(GSH)含量和细胞内活性氧(ROS)产生等方面的差异在 C6 星形胶质细胞中。利培酮显著增加了谷氨酸摄取(高达 27%)、GS 活性(14%)和 GSH 含量(高达 17%)。相比之下,氟哌啶醇不能改变任何这些神经胶质功能。然而,在 10 μM 浓度下,氟哌啶醇增加了(12%)ROS 产生。我们的数据有助于阐明关于不同抗精神病药刺激后可能产生的神经反应的不同假说,并可能为增强大脑重塑方式提供重要的见解。
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