Abstract
Evaluation of myelin content is crucial for attention-deficit/hyperactivity disorder (ADHD). To estimate myelin content in ADHD based on synthetic MRI–based method and compare it with established diffusion tensor imaging (DTI) method. Fifth-nine ADHD and fifty typically developing (TD) children were recruited. Global and regional myelin content (myelin volume fraction [MVF] and myelin volume [MYV]) were assessed using SyMRI and compared with DTI metrics (fractional anisotropy and mean/radial/axial diffusivity). The relationship between significant MRI parameters and clinical variables were assessed in ADHD. No between-group differences of whole-brain myelin content were found. Compared to TDs, ADHD showed higher mean MVF in bilateral internal capsule, external capsule, corona radiata, and corpus callosum, as well as in left tapetum, left superior fronto-occipital fascicular, and right cingulum (all PFDR-corrected < 0.05). Increased MYV were found in similar regions. Abnormalities of DTI metrics were mainly in bilateral corticospinal tract. Besides, MVF in right retro lenticular part of internal capsule was negatively correlated with cancellation test scores (r = – 0.41, P = 0.002), and MYV in right posterior limb of internal capsule (r = 0.377, P = 0.040) and left superior corona radiata (r = 0.375, P = 0.041) were positively correlated with cancellation test scores in ADHD. Increased myelin content underscored the important pathway of frontostriatal tract, posterior thalamic radiation, and corpus callosum underlying ADHD, which reinforced the insights into myelin quantification and its potential role in pathophysiological mechanism and disease diagnosis. Prospectively registered trials number: ChiCTR2100048109; date: 2021–07.
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Data availability
Data generated or analyzed during the study are available from the corresponding author by request.
Abbreviations
- ADHD:
-
Attention-deficit/hyperactivity disorder
- SyMRI:
-
Synthetic magnetic resonance imaging
- DTI:
-
Diffusion tensor imaging
- TD:
-
Typically developing
- MVF:
-
Myelin volume fraction
- MYV:
-
Myelin volume
- WM:
-
White matter
- CC:
-
Corpus callosum
- CG:
-
Cingulum
- FA:
-
Fractional anisotropy
- MD:
-
Mean diffusivity
- RD:
-
Radiate diffusivity
- AD:
-
Axial diffusivity
- PD:
-
Proton density
- PLIC:
-
Posterior limb of internal capsule
- RLIC:
-
Retro lenticular part of internal capsule
- ACR:
-
Anterior corona radiate
- SCR:
-
Superior corona radiate
- EC:
-
External capsule
- ALIC:
-
Anterior limb of internal capsule
- GCC:
-
Genu of corpus callosum
- SFOF:
-
Superior fronto-occipital fascicular
- CST:
-
Corticospinal tract
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Acknowledgements
We would like to thank the participants and their families and the staff at the MRI at our center for all their help and support.
Funding
This work was supported by the Natural Science Fund Youth Science Fund Project of China [grant number 82001439] and the Natural Science Fund Project of Guangdong Province [grant numbers 2022A1515011910].
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Liping Lin, Yingqian Chen, Yan Dai, Zhiyun Yang, and Shu Su wrote the main manuscript text and Zi Yan, Mengsha Zou, Qin Zhou, Long Qian, and Wei Cui prepared figures 1-4. Meina Liu and Hongyu Zhang prepared table 1-2. All authors reviewed the manuscript.
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This study was approved by the institutional review board of the First Affiliated Hospital of Sun Yat-Sen University (No. [2019]328). Written informed consent was obtained from the guardians of all the subjects and their guardians in this study.
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Lin, L., Chen, Y., Dai, Y. et al. Quantification of myelination in children with attention-deficit/hyperactivity disorder: a comparative assessment with synthetic MRI and DTI. Eur Child Adolesc Psychiatry (2023). https://doi.org/10.1007/s00787-023-02297-3
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DOI: https://doi.org/10.1007/s00787-023-02297-3