早期帕金森病的冲动-强迫行为是由冷漠和多巴胺受体D3多态度决定的
Hendrik Theis1,2, Stéphane Prange1,3, Gérard N Bischof1,4
1Faculty of Medicine and University Hospital Cologne, Department of Nuclear Medicine, Multimodal Neuroimaging Group, University of Cologne, 50937, Cologne, Germany.
NPJ Parkinson's disease
|November 16, 2023
概括
无情和多巴胺受体D3 (DRD3) 基因变异是早期帕金森病中冲动-强迫行为 (ICB) 的危险因素. 无动于衷可能会使患者在多巴胺治疗后倾向于ICB,由DRD3风险变体放大.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 精神病学是一个精神病学.
背景情况:
- 冲动-强迫行为 (ICB) 和冷漠是早期帕金森病 (PD) 的常见非运动症状.
- 这两种情况都与边缘性多巴胺基系统有关,这表明共享的病理生理机制.
- 多巴胺受体D3 (DRD3) Ser9Gly多态性影响了边缘性条纹体中多巴胺受体的亲和力.
研究的目的:
- 调查ICB,冷漠和DRD3基因多态性在早期PD之间的关系.
- 检查冷漠和DRD3基因型对灰质体积和多巴胺合成能力的影响.
- 了解多巴胺替代疗法后ICB发展的诱导因素.
主要方法:
- 54名早期PD患者接受了MRI,以评估灰质体积.
- 40名患者用[18F]DOPA进行PET成像,以测量条纹性多巴胺合成能力.
- DRD3 Ser9Gly (rs6280) 多态性被基因定型,并使用验证的尺度来评估ICB/无能症严重程度.
主要成果:
- ICB严重程度与冷漠度严重程度正相关.
- 无动于衷和DRD3多态性作为ICB的危险因素相互作用.
- 无动于衷与双边膜缩和边缘条状膜的多巴胺合成能力降低有关;DRD3风险变体在膜和边缘条状膜中显示了减少的多巴胺合成.
结论:
- 药物原始的PD患者的冷漠可能源于条性多巴胺基基调的受损,可能使他们容易患上ICB.
- 由于较高的多巴胺亲和力,DRD3风险变体可能会放大这种倾向.
- 这些发现突出了帕金森病中冷漠,遗传和ICB之间的复杂相互作用.
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