目的研究青少年首发抑郁症患者前扣带回(anterior cingulate cortex,ACC)和杏仁核功能连接(FC)改变。
方法选取30例首发青少年抑郁症患者(患者组)和29例青少年健康志愿者(HC组)。采用静息态功能磁共振技术对患者组和HC组进行扫描,选取ACC和杏仁核为感兴趣区。研究杏仁核和ACC与全脑脑区FC改变是否存在差异及异常FC是否与临床特征相关。
结果与HC组相比,患者组左侧杏仁核与双侧颞中回、左侧枕中回、右侧内侧前额叶皮层(medial prefrontal cortex,MPFC)(MNI x,y,z:9,66,15)( t=2.80)FC上升,与右侧丘脑(15,-21,18)( t=-2.85)FC下降;右侧杏仁核与右侧颞中回、右侧MPFC(MNI x,y,z:6,69,12)( t=2.41)的FC上升,与左侧额中回、右侧额中回、左侧尾状核(MNI x,y,z:-15,-9,21)( t=-2.53)、右侧丘脑(MNI x,y,z:12,-36,12)( t=-3.01)、右侧小脑(MNI x,y,z:3,-84,-33)( t=-2.45)FC下降;左侧ACC与右侧眶部额中回FC上升,与右侧眶部额下回、左侧三角部额下回、右侧小脑(12,-87,-24)( t=-2.36)FC下降;右侧ACC与左侧尾状核(MNI x,y,z:-15,21,6)( t=-2.29)、右侧颞中回、右侧MPFC(MNI x,y,z:9,54,36)( t=-2.41)、右侧眶部额下回、右侧角回(MNI x,y,z:45,-51,21)( t=-3.01)、左侧背外侧额上回FC(MNI x,y,z:-21,33,36)( t=-2.61)FC下降。左侧杏仁核与左侧颞中回功能连接z值( r=0.50, P<0.05)、左侧杏仁核与右侧颞中回功能连接z值( r=0.45, P<0.05)与HAMD评分呈正相关。右侧杏仁核与右侧额中回功能连接z值与病程呈正相关( r=0.63, P<0.05)。
结论青少年首发抑郁症患者杏仁核和前扣带回存在广泛功能连接紊乱。功能连接异常改变可能是抑郁症发病的神经病理机制。
ObjectiveTo study the resting-state functional connectivity(FC) changes of anterior cingulate cortex(ACC) and amygdala in adolescent patients with medication-naive first-episode major depressive disorder(MDD).
MethodsMedication-naive first-episode MDD adolescents( n=30) and pair-wise matched healthy controls(HCs, n=29) underwent resting-state functional magnetic resonance images(fMRI). To study whether there were different in FC changes between amygdala and ACC and whole brain regions, and whether abnormal FC was related to clinical characteristics.
ResultsCompared with HCs, the adolescent MDD patients showed decreased FC between the left amygdala and right thalamus(MNI x, y, z: 15, -21, 18)( t=-2.85)and increased FC between the left amygdala and the bilateral temporal middle gyrus, left occipital gyrus, right medial prefrontal cortex(MPFC)(MNI x, y, z: 9, 66, 15)( t=2.80). The right amygdale showed decreased FC with bilateral middle frontal gyrus, left caudate(MNI x, y, z: -15, -9, 21)( t=-2.53), right thalamus(MNI x, y, z: 12, -36, 12)( t=-3.01), right cerebellum(MNI x, y, z: 3, -84, -33)( t=-2.45) and increased FC with right temporal middle gyrus, right MPFC(MNI x, y, z: 6, 69, 12)( t=2.41). The left ACC showed decreased FC with left cerebellum(MNI x, y, z: 12, -87, -24)( t=-2.36), left frontal inferior triangle gyrus, right frontal inferior orbital gyrus and increased FC with right frontal middle orbital gyrus.The right ACC showed decreased FC with left caudate(MNI x, y, z: -15, 21, 6)( t=-2.29), right temporal middle gyrus, right MPFC(MNI x, y, z: 9, 54, 36)( t=-2.29), right frontal inferior orbital gyrus, right angular(MNI x, y, z: 45, -51, 21)( t=-3.01), left dorsolateral prefrontal cortex(MNI x, y, z: -21, 33, 36)( t=-2.61). The increased FC between the left amygdale and bilateral temporal middle gyrus showed positive correlation with the score of HAMD( r=0.50, P<0.05; r=0.45, P<0.05). And the FC between the right amygdale and right middle frontal gyrus was positive correlation with duration of disease( r=0.63, P<0.05).
ConclusionThere is widespread FC disorder in amygdala and ACC in adolescents patients with first-episode depression.Abnormal FC changes may be the neuropathological mechanism of depression.
朱妍,李淑英,吕培培,等. 青少年首发抑郁症患者前扣带回和杏仁核功能连接异常改变研究[J]. 中华行为医学与脑科学杂志,2018,27(6):505-510.
DOI:10.3760/cma.j.issn.1674-6554.2018.06.005版权归中华医学会所有。
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