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在严重抑郁症中,局部代谢活动与分布式功能连接之间的关系

Wendy Sun^1,2, Anne Billot^2,3, Stephanie McMains⁴

¹Center for Brain Science, Neuroimaging Facility, Harvard University, Cambridge, MA, 02138, USA.

Translational psychiatry

|December 1, 2025

概括

大型抑郁症 (MDD) 涉及到大脑代谢和连接的改变. 这项研究将局部代谢变化与MDD患者的功能连接与突出网络联系起来.

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:

大型抑郁症 (MDD) 的特征是大脑活动和连接能力的改变.
了解局部代谢和网络连接之间的相互作用对于识别MDD的病理生物学至关重要.

研究的目的:

为了研究本地代谢活动和无药MDD患者的功能连接之间的关系.
通过检查代谢和连接水平之间的相互作用来确定MDD的新病理生物学特征.

主要方法:

同时使用18-氧葡萄糖PET (FDG-PET) 和静止状态功能性MRI (rsfMRI) 在21名MDD患者和21名对照组中使用.
在MDD.中确定了具有改变代谢 (高代谢/低代谢) 的感兴趣区域 (ROI).
基于种子的功能连接 (FC) 地图是从这些代谢ROI中衍生出来的,并且在组之间进行了比较.

主要成果:

患有MDD的受试者在环膜-眼膜网络中表现出超高代谢,在默认网络中表现出低代谢.
在MDD中,高代谢ROI表现出更强的功能连接与前侧状突出网络.
在MDD中,低代谢ROI显示与相同的突出网络区域的功能连接性较弱.

结论:

MDD涉及到本地大脑代谢的分布式变化.
这些新陈代谢变化与对应的增加和减少与前前突出网络的功能合有关.
这些发现强调了突出网络在MDD病理生理学中的作用.

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