艾滋病毒感染者和大麻使用者的神经补偿:从重组的DMN中获得的见解
Mohsen Bahrami1,2, Paul J Laurienti1,2, Sheri L Towe3
1Laboratory for Complex Brain Networks, Wake Forest School of Medicine, Winston-Salem, NC, USA.
Network neuroscience (Cambridge, Mass.)
|March 5, 2026
概括
这项研究揭示了艾滋病毒和大麻如何影响大脑的默认模式网络 (DMN). 同时发生的HIV和MJ使用可能导致DMN重组,可能有助于保持认知功能.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 神经成像是一种神经成像.
背景情况:
- 艾滋病毒感染和大麻 (MJ) 使用普遍存在,但它们对大脑网络和认知的综合影响尚不清楚.
- 认知障碍在艾滋病毒感染者中很常见,因此需要对导致的神经因素进行研究.
- 默认模式网络 (DMN) 对认知功能至关重要,使其成为HIV和MJ使用背景下调查的关键领域.
研究的目的:
- 研究人类免疫缺陷病毒 (HIV) 和大麻 (MJ) 使用对默认模式网络 (DMN) 的结构组织的相互作用影响.
- 确定DMN组织中观察到的变化是否与艾滋病毒感染者和没有艾滋病毒感染者的认知表现相关,以及不同MJ使用情况.
- 为了测试HIV破坏DMN小世界属性的假设,MJ使用可能会加剧这种效应.
主要方法:
- 功能磁共振成像 (fMRI) 数据从237名成年人 (年龄25-59岁) 中获得,分为四组:HIV阴性/MJ阴性,HIV阳性/MJ阴性,HIV阴性/MJ阳性和HIV阳性/MJ阳性.
- 进行神经心理测试以评估全球认知表现.
- 计算了小世界网络属性,特别是集群系数和全球效率,以分析DMN组织.
主要成果:
- 在对照组 (HIV-MJ-) 和其他三组之间观察到DMN聚类和效率的显著差异.
- 与HIV和MJ使用同时发生的个体 (HIV+MJ+) 展示了DMN重组,有利于效率而不是集群.
- 全球认知表现与这些群体差异有关,HIV/MJ参与者在认知得分中显示出更集成的DMN,这表明了潜在的补偿机制.
结论:
- 艾滋病毒和MJ使用相互作用,改变DMN的结构组织.
- 在HIV和MJ使用同时发生的个体中观察到的DMN重组可能代表维持认知功能的补偿策略.
- 需要进一步的研究来阐明这些神经生物学变化对该人口认知健康的长期影响.
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