精神分裂症的认知障碍与前额外状功能性低连接性和状多巴胺基异常有关
Kai-Chun Yang1,2, Bang-Hung Yang3,4, Mu-N Liu1,2
1Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan.
Journal of psychopharmacology (Oxford, England)
|June 10, 2024
概括
精神分裂症患者表现出认知障碍,与前额外状连接性降低和多巴胺转运体 (DAT) 可用性改变有关. 这些大脑变化特别影响注意力和执行功能,突出显示潜在的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 医疗成像医学成像
背景情况:
- 精神分裂症的认知障碍显著影响功能结果.
- 与精神分裂症相关的认知缺陷的有效治疗方法仍然有限.
- 了解底层的神经生物学机制对于开发向疗法至关重要.
研究的目的:
- 调查前额前-状连接,多巴胺系统变化和精神分裂症认知障碍之间的关系.
- 探索这两个拟议的病理生理学途径之间的相互作用.
- 识别与不同认知领域相关的特定神经成像标记.
主要方法:
- 招募了33名精神分裂症患者和27名健康对照 (HC).
- 使用综合电池评估认知 (注意力,记忆,执行功能).
- 使用静止状态fMRI测量了背侧前额叶皮层 (DLPFC) /中额叶 (MiFG) 和条纹体之间的功能连接 (FC).
- 使用99mTc-TRODAT SPECT进行量化条状多巴胺转运体 (DAT) 的可用性.
主要成果:
- 与精神分裂症患者相比,精神分裂症患者的认知表现较差.
- 在患者中,在DLPFC/MiFG和尾状核 (CN) /putamen之间观察到减少的FC.
- 在患者中发现左CN的DAT可用性降低和CN的DAT不对称性改变.
- 确定了特定的关联:DLPFC/MiFG-putamen FC与注意力,以及CN DAT不对称性与执行功能.
结论:
- 这项研究提供了新的证据,将前额前-状腺低连接性和改变的状腺DAT标记物与精神分裂症中的特定认知障碍联系起来.
- 研究结果强调了精神分裂症中大脑连接和多巴胺系统功能障碍之间的复杂相互作用.
- 需要进一步的研究来阐明这些关系并探索治疗影响.
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