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Effects of the 2-Repeat Allele of the DRD4 Gene on Neural Networks Associated With the Prefrontal Cortex in Children With ADHD

Overview of attention for article published in Frontiers in Human Neuroscience, July 2018
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Title
Effects of the 2-Repeat Allele of the DRD4 Gene on Neural Networks Associated With the Prefrontal Cortex in Children With ADHD
Published in
Frontiers in Human Neuroscience, July 2018
DOI 10.3389/fnhum.2018.00279
Pubmed ID
Authors

Andan Qian, Jiejie Tao, Xin Wang, Huiru Liu, Lingxiao Ji, Chuang Yang, Qiong Ye, Chengchun Chen, Jiance Li, Jingliang Cheng, Meihao Wang, Ke Zhao

Abstract

Objective: Genetic variation, especially polymorphism of the dopamine D4 receptor gene (DRD4), has been linked to deficits in self-regulation and executive functions and to attention deficit hyperactivity disorder (ADHD), and is related to the structural and functional integrity of the default mode network (DMN), the executive control network (ECN) and the sensorimotor network (SMN). The aim of this study was to explore the effects of the 2-repeat allele of the DRD4 gene on brain network connectivity and behaviors in children with ADHD. Methods: Using independent component analysis (ICA) and dimension analyses, we examined resting-state functional magnetic resonance imaging (fMRI) data obtained from 52 Asian medicine-naive children with ADHD (33 2-repeat absent and 19 2-repeat present). Results: We found that individuals with 2-repeat absent demonstrated increased within-network connectivity in the right precuneus of the DMN, the right middle frontal gyrus (MFG) of the SMN compared with individuals with 2-repeat present. Within the ECN, 2-repeat absent showed decreased within-network connectivity in the left inferior frontal gyrus (IFG) and the left anterior cingulate cortex. A deeper study found that connectivity strength of the left IFG was directly proportional to the Stroop reaction time in 2-repeat absent group, and as well as the right MFG in 2-repeat present group. Conclusion: Polymorphisms of the DRD4 gene, specifically 2-repeat allele, had effects on the ECN, the SMN and the DMN, especially in the prefrontal cortex (PFC) circles. ADHD children with DRD4 2-repeat allele have aberrant resting-state within-network connectivity patterns in the left IFG and the right MFG related to dysfunction in inattention symptom. This study provided novel insights into the neural mechanisms underlying the effects of DRD4 2-repeat allele on ADHD.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 77 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 77 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 14 18%
Student > Master 13 17%
Student > Doctoral Student 10 13%
Student > Bachelor 6 8%
Researcher 5 6%
Other 8 10%
Unknown 21 27%
Readers by discipline Count As %
Psychology 18 23%
Medicine and Dentistry 9 12%
Neuroscience 8 10%
Biochemistry, Genetics and Molecular Biology 3 4%
Social Sciences 3 4%
Other 8 10%
Unknown 28 36%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 19 July 2018.
All research outputs
#18,640,437
of 23,092,602 outputs
Outputs from Frontiers in Human Neuroscience
#6,107
of 7,214 outputs
Outputs of similar age
#252,353
of 326,942 outputs
Outputs of similar age from Frontiers in Human Neuroscience
#112
of 125 outputs
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