神经化学机制是人类神经可塑性的血清激素调节的基础
Lorena Melo1, Marie C Beaupain2, Elham Ghanavati2
1Department of Psychology and Neurosciences, Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany.
Brain stimulation
|April 4, 2024
概括
选择性血清素再吸收抑制剂 (SSRI) 通过调节谷氨酸而不是GABA来增强大脑可塑性. 这项研究研究了SSRI对跨直流刺激 (tDCS) 诱导的可塑性的影响,揭示了谷氨酸酸.
科学领域:
- 神经科学是一个神经科学.
- 神经生理学 神经生理学
- 神经药理学神经药理学
背景情况:
- 已知选择性血清素再吸收抑制剂 (SSRI) 能调节皮质神经可塑性.
- 精确的机制,特别是氨酸 (GABA) 和谷氨酸在SSRI介导的可塑性中的作用,仍然不清楚.
- 了解这些机制对于开发有针对性的神经调节疗法至关重要.
研究的目的:
- 为了研究谷氨酸和GABA依赖过程对跨直流刺激 (tDCS) 诱导的可塑性的影响.
- 探索如何通过SSRI增强血清激素,影响健康个体的tDCS诱导的神经可塑性.
- 阐明SSRI对大脑可塑性的作用的机制基础.
主要方法:
- 一项随机的,部分双盲的,模拟控制的交叉研究,涉及21名健康参与者.
- 经直流刺激 (tDCS) 用于诱导运动皮层中的可塑性 (LTP类的阳极式,LTD类的阴极式).
- 在SSRI (citalopram) 或安慰剂条件下,对脉冲跨磁刺激监测了短间隔皮质抑制 (SICI) 和皮质内促进 (ICF).
主要成果:
- 避孕药:阳极tDCS降低了SICI和增加了ICF;阴极tDCS有相反的效果.
- SSRI (citalopram):阳极tDCS增强和延长ICF,SICI变化最小.
- 简称SSRI (citalopram):阴极tDCS效应因剂量而有所逆转,较高剂量延长了效果.
结论:
- 急性血清激素增强,特别是通过SSRI,似乎主要涉及谷氨基酶系统调节tDCS诱导的可塑性.
- 观察到的LTP类可塑性效应的增加和延长表明谷氨酸对谷氨酸具有重要作用.
- 需要进一步的研究来完全界定GABAergic贡献,并完善神经调节策略.
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