Investigating interactive effects of worry and the catechol-o-methyltransferase gene (COMT) on working memory performance.

Investigating interactive effects of worry and the catechol-o-methyltransferase gene (COMT) on working memory performance.
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DOI:
10.3758/s13415-021-00922-9
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发表时间:
2021-12
影响因子:
2.9
通讯作者:
Moser, Jason S.
Moser, Jason S.
中科院分区:
医学3区
文献类型:
--
作者:
Louis, Courtney C.;D'Esposito, Mark;Moser, Jason S.

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现有的研究表明,担心与工作记忆减少有关。然而,目前还不清楚是什么机制导致了焦虑者的表现受损。重要的是,前额叶皮层中的多巴胺严重影响工作记忆任务中心理表征的稳定性,但还没有研究探讨它在担忧和工作记忆之间的关联中的作用。为了解决这一差距,目前的研究旨在研究多巴胺对担忧和工作记忆之间关联的调节作用,使用儿茶酚-O-甲基转移酶(COMT)基因作为多巴胺基础水平的代表。在四项评估中,我们研究了人内和人与人之间的担忧变化及其与COMT的交互作用,以预测工作记忆表现。担忧的人内变化与COMT相互作用以预测准确性,因此,随着时间的推移,纯合子瓦尔携带者的担忧越高,预测准确性越低,但Met携带者则不然。我们的研究结果表明,基础多巴胺在个人随着时间的推移而增加的担忧如何对工作记忆表现产生负面影响方面发挥着重要作用。
Extant research indicates that worry is associated with reduced working memory. It remains unclear, however, what mechanisms contribute to impaired performance in worriers. Critically, dopamine in the prefrontal cortex heavily influences the stability of mental representations during working memory tasks, yet no research has probed its role in associations between worry and working memory. To address this gap, the current study was designed to examine the moderating role of dopamine on the association between worry and working memory, using the catechol-o-methyltransferase (COMT) gene as a proxy for basal levels of dopamine. Across four assessments, we examined within- and between-person variation in worry and its interactive effects with COMT to predict working memory performance. Within-person variation in worry interacted with COMT to predict accuracy, such that higher worry across time predicted less accuracy for homozygous Val carriers but not Met carriers. Our findings demonstrate that basal dopamine plays an important role in how increases in worry across time for an individual negatively impact working memory performance.
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