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Neurochemical and Behavioral Features of Action of Pre-Fibrillar Oligomeric Structures of α-Sinuclein in Adult Mice
Neurochemical Journal ( IF 0.5 ) Pub Date : 2020-03-31 , DOI: 10.1134/s1819712420010092
M. A. Gruden’ , O. A. Solov’eva , V. S. Kudrin , V. B. Narkevich , V. V. Sherstnev

Abstract—The pre-fibrillar oligomeric structures of the α-synuclein protein formed during misfolding play an important role in the molecular pathogenesis of Parkinson’s disease and other age-dependent neurodegenerative diseases. We studied the effect of toxic α-synuclein oligomers administered intranasally for 14 days on the motor activity, learning, memory, and anxiety of adult (6-month-old) male C57Bl/6 mice, and on the levels and metabolism of monoamines and neurotransmitter amino acids in the hippocampus and the frontal cortex. We used the open field, passive avoidance, and elevated plus maze tests. The levels of monoamines and their metabolites, and neurotransmitter amino acids in the brain tissue of animals were determined by high performance liquid chromatography with electrochemical detection. It was found that oligomers of α‑synuclein cause an increase in anxiety in adult mice, a pronounced decrease in dopamine levels and oppositely directed changes in dopamine metabolite levels in the hippocampus and frontal cortex. No significant changes were found in learning indices and long-term memory, motor activity of animals, levels of noradrenaline, serotonin, or neurotransmitter amino acids in the studied brain structures after treatment with α-synuclein oligomers. We compared the experimental data and the results of our previous studies on the behavioral and neurochemical effects of oligomeric protein structures in aging 12-month-old mice. The possible mechanisms of the age-dependent effects of the α-synuclein oligomers are discussed.

中文翻译:

成年小鼠α-Sinuclein的原纤维前寡聚结构作用的神经化学和行为特征

摘要—在错误折叠过程中形成的α-突触核蛋白的原纤维前寡聚结构在帕金森氏病和其他年龄依赖性神经退行性疾病的分子发病机理中起重要作用。我们研究了经鼻内给药14天的有毒α-突触核蛋白寡聚物对成年(6个月大)雄性C57Bl / 6小鼠的运动活动,学习,记忆和焦虑以及单胺和海马和额叶皮层中的神经递质氨基酸。我们使用了开阔地,被动回避和高架迷宫测试。动物脑组织中单胺及其代谢产物和神经递质氨基酸的含量通过高效液相色谱-电化学检测来确定。发现α-突触核蛋白的低聚物引起成年小鼠的焦虑增加,海马和额叶皮层中多巴胺水平明显降低,多巴胺代谢产物水平相反。用α-突触核蛋白寡聚体治疗后,在研究的大脑结构中,学​​习指数和长期记忆,动物运动能力,去甲肾上腺素,5-羟色胺或神经递质氨基酸水平没有明显变化。我们比较了实验数据和以前的研究结果对衰老的12个月大小鼠的寡聚蛋白结构的行为和神经化学作用。讨论了α-突触核蛋白寡聚体的年龄依赖性效应的可能机制。海马和额叶皮层中的多巴胺水平显着下降,而多巴胺代谢物水平却发生相反的变化。用α-突触核蛋白寡聚体治疗后,在研究的大脑结构中,学​​习指数和长期记忆,动物运动能力,去甲肾上腺素,5-羟色胺或神经递质氨基酸水平没有明显变化。我们比较了实验数据和以前的研究结果对衰老的12个月大小鼠的寡聚蛋白结构的行为和神经化学作用。讨论了α-突触核蛋白寡聚体的年龄依赖性效应的可能机制。海马和额叶皮层中的多巴胺水平显着下降,而多巴胺代谢物水平却出现相反的变化。用α-突触核蛋白寡聚体治疗后,在研究的大脑结构中,学​​习指数和长期记忆,动物运动能力,去甲肾上腺素,5-羟色胺或神经递质氨基酸水平没有明显变化。我们比较了实验数据和以前的研究结果对衰老的12个月大小鼠的寡聚蛋白结构的行为和神经化学作用。讨论了α-突触核蛋白寡聚体的年龄依赖性效应的可能机制。用α-突触核蛋白寡聚体治疗后,研究的大脑结构中的5-羟色胺或神经递质氨基酸。我们比较了实验数据和以前的研究结果对衰老的12个月大小鼠的寡聚蛋白结构的行为和神经化学作用。讨论了α-突触核蛋白寡聚体的年龄依赖性效应的可能机制。用α-突触核蛋白寡聚体治疗后,研究的大脑结构中的5-羟色胺或神经递质氨基酸。我们比较了实验数据和以前的研究结果对衰老的12个月大小鼠的寡聚蛋白结构的行为和神经化学作用。讨论了α-突触核蛋白寡聚体的年龄依赖性效应的可能机制。
更新日期:2020-03-31
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