在帕金森病中,凸显的平边形和减少的中边形D2/3-冲动性关联在帕金森病中
Adam J Stark1, Alexander K Song2, Kalen J Petersen3
1School of Medicine, Vanderbilt University, Nashville, Tennessee 37232.
概括
帕金森病 (PD) 中的冲动性与健康个体不同,多巴胺D2/3受体关系在大脑中发生转变. 这项研究显示,与对照人群相比,PD患者的多巴胺冲动性联系发生了变化.
科学领域:
- 神经科学是一个神经科学.
- 神经药理学神经药理学
- 行为科学 行为科学
背景情况:
- 冲动性是神经精神疾病的关键特征,包括帕金森病 (PD).
- 在中皮层临回路中的多巴胺D2/3自受体参与调节特征冲动性.
- 以前的研究表明,PD患者具有冲动-强迫性行为时,D2/3结合发生变化,但PD中的特征冲动性-D2/3关系仍未得到充分研究.
研究的目的:
- 研究帕金森病患者的特征冲动性和多巴胺D2/3受体结合潜力 (BP_ND) 之间的关系.
- 为了将PD患者的这些关系与年龄和性别匹配的健康对照 (HC) 进行比较.
- 探索中皮质皮质和临床回路中的区域差异,这些关系可能存在差异.
主要方法:
- 54名PD患者和31名健康对照 (HCs) 接受了[18F]fallypride正子发射断层扫描 (PET) 来测量D2/3受体BP_ND.
- 用巴拉特冲动性量表 (BIS) 评估特征冲动性.
- 皮层下和皮层D2/3 BP_ND分别使用兴趣区域 (ROI) 和voxelwise方法进行分析.
主要成果:
- 在HC中,在腹状条纹体和杏仁体中观察到特征冲动性和D2/3BP_ND之间的负相关性.
- 这种皮质下关系在PD患者中不存在.
- 相反,PD患者在腹前方偏皮质的特征冲动性和D2/3 BP_ND之间显示出正相关性,这种关系在HC中没有见过.
结论:
- 多巴胺D2/3受体在不同的中皮层临区域发挥作用,影响冲动性,PD的区域重要性不同.
- 在健康个体中,PD与皮质下多巴胺冲动性调节的丧失有关.
- 在PD患者的前额偏边皮质中出现一种新的多巴胺-冲动性关系,可能代表一种补偿机制或是未来干预的目标.
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