Distinct alterations in cerebellar connectivity with substantia nigra and ventral tegmental area in Parkinson's disease.

Distinct alterations in cerebellar connectivity with substantia nigra and ventral tegmental area in Parkinson's disease.
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DOI:
10.1038/s41598-022-07020-x
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发表时间:
2022-02-28
期刊:
影响因子:
4.6
通讯作者:
Smith DV
Smith DV
中科院分区:
综合性期刊3区
文献类型:
--
作者:
O'Shea IM;Popal HS;Olson IR;Murty VP;Smith DV

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在帕金森病 (PD) 中,多巴胺能神经元的神经变性发生在中脑,特别针对黑质 (SN),而腹侧被盖区 (VTA) 在疾病早期相对不受影响。尽管已知 SN 和 VTA 在健康成人中具有功能性分离,但目前尚不清楚这种分离在 PD 中如何改变。为了研究这个问题,我们使用从三个独立数据集编译的静息态功能磁共振成像 (rs-fMRI) 数据进行了全脑分析,以比较 PD 与健康成人的功能连接。我们的分析表明,在整个样本中,SN 与楔前叶、前扣带回和枕叶皮质区域具有更大的连通性,部分复制了我们之前在健康年轻人中的工作。值得注意的是,我们还发现,在 PD 中,VTA 右小脑的连接性高于 SN 右小脑的连接性,而健康对照组则出现相反的趋势。这种双重解离可能反映了小脑在帕金森病中的代偿作用,并为未来的研究和治疗提供了潜在的目标。
In Parkinson’s disease (PD), neurodegeneration of dopaminergic neurons occurs in the midbrain, specifically targeting the substantia nigra (SN), while leaving the ventral tegmental area (VTA) relatively spared in early phases of the disease. Although the SN and VTA are known to be functionally dissociable in healthy adults, it remains unclear how this dissociation is altered in PD. To examine this issue, we performed a whole-brain analysis to compare functional connectivity in PD to healthy adults using resting-state functional magnetic resonance imaging (rs-fMRI) data compiled from three independent datasets. Our analysis showed that across the sample, the SN had greater connectivity with the precuneus, anterior cingulate gyrus, and areas of the occipital cortex, partially replicating our previous work in healthy young adults. Notably, we also found that, in PD, VTA-right cerebellum connectivity was higher than SN-right cerebellum connectivity, whereas the opposite trend occurred in healthy controls. This double dissociation may reflect a compensatory role of the cerebellum in PD and could provide a potential target for future study and treatment.
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