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母亲教养对青少年抑郁症状的影响: 杏仁核功能连接的中介机制及其遗传度研究
Alternative TitleMediating Effect and He ritabilitv of Amvgdala Re sting connectivity between Maternal Parenting and Adolescent Depressive Symptoms

最新资料显示,我国成年人抑郁症的终生患病率在精神障碍中排在第二位,己成为我国重要的公共卫生问题。青少年处在抑郁易感性迅速上升的关键时期,以往研究发现遗传与环境的相互作用是造成青少年抑郁的主要原因。然而,目前对遗传与环境相互作用影响青少年抑郁的具体病理机制仍知之甚少。随着脑成像技术的发展,影像遗传学研究将大脑作为风险基因与环境相互作用影响抑郁的中间表型,推动了对于抑郁发病机制的认识,但对于正常环境中青少年抑郁症状的相关研究还较少。依据遗传与环境相互作用的脑成像研究理论框架,本研究在北京市双生子库(Beijing Twin Study BeTwiSt)的纵向行为数据基础上进一步收集了108对青少年双生子的静息态脑成像及行为数据,系统考察了以杏仁核为种子点的全脑静息态功能连接模式在母亲教养与青少年抑郁间的中介效应,以及遗传因素在其中所起的作用。本研究的主要内容及结果包括:





Other Abstract

The lifetime prevalence of adult depression ranks second among mental disorders and has become an important pubfic health problem in China. Adolescent is a curcial stage for studying the etiology of depression as there is a dramatic increase in the incidence rates of depression during this period. Previous studies have found that gene-environmental interactions (G x E) is the main cause of depression. However, little is known about the specific pathological mechanisms by which gene-environmental interactions affect adolescent depression. With the development of brain imaging technology, imaging genetics research defines the structure or function of brain circuits as an intermediate phenotype of risk genes interacting with the environment to influence depression, which promotes the understanding of the pathogenesis of depression. However, there are few imaging studies for mapping the effect of genes interacting with the normal environment on brain function related with adolescent depressive symptoms. According to an imaging gene-environment (IG x E) framework, this dissertation collected resting-state functional magnetic resonance imaging (fMIRl) data of 108 pairs of same-gender twins based on Beijing Twin Study (BeTwiSt) and investigated the effect of maternal negative parenting, genes on amygdala seed-based whole-brain connectivity and adolescent depressive symptoms. The main content and findings are as follows:

First, we used a longitudinal study design to examine the effects of maternal negative and positive parenting in early adolescence (13 years) on amygdala-based emotional brain circuitry in mid adolescence (16 years). We found maternal negative parenting significantly predicted the connectivity between left amygdala and regions in inferior frontal gyros, left temporal lobe, bilateral cinguhto gyros, as well as between right amygdala and regions in inferior frontal gyros and right precentral gyros.

Second, a structural equation modeling (SEM) was performed to test whether the above altered amygdala-based brain circuits mediated the association between maternal parenting and persistent depressive symptoms. We found functional connectivity between the left amygdala and the left inferior frontal gyros served as a mediator between maternal negative parenting and adolescent depressive symptoms.

Third, we used twin research design to analyze the heritability of amygdala-based emotional brain circuitry served as a mediator and further examine if there was a common genetic and environmental basis for these brain circuits and adolescent depressive symptoms. The heritability estimates of functional connectivity between the left amygdala and the left inferior frontal gyros and adolescent depressive symptoms was 19070 and 83070. Moreover, there was a common genetic and nonshared environment influence on the association between amygdala-based emotional brain circuitry and adolescent depressive symptoms.

Overall, this dissertation highlights that maternal negative parenting in early adolescence may influence the development of amygdala-prefrontal hyperconnectivity in a manner leading to depressive symptoms in mid adolescence, and such abnormality of emotion-rehted brain circuitry may be heritable and shared common genetic and nonshared environment factors with adolescent depressive symptoms.

Keyword母亲教养 遗传 杏仁核 青少年抑郁 双生子
Degree Name理学博士
Degree Discipline健康心理学
Degree Grantor中国科学院大学
Place of Conferral中国科学院心理研究所
Document Type学位论文
Recommended Citation
GB/T 7714
姜能治. 母亲教养对青少年抑郁症状的影响: 杏仁核功能连接的中介机制及其遗传度研究[D]. 中国科学院心理研究所. 中国科学院大学,2019.
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