Abstract
Impaired sensorimotor circuits have been suggested in Attention-deficit/hyperactivity disorder (ADHD). NRXN1, highly expressed in cortex and cerebellum, was one of the candidate risk genes for ADHD, while its effects on sensorimotor circuits are unclear. In this content, we aimed to investigate the differential brain effects as functions of the cumulative genetic effects of NRXN1 variants in ADHD and healthy controls (HCs), identifying a potential pathway mapping from NRXN1, sensorimotor circuits, to ADHD. Magnetic resonance imaging, blood samples and clinical assessments were acquired from 53 male ADHD and 46 sex-matched HCs simultaneously. The effects of the cumulative genetic effects of NRXN1 variants valued by poly-variant risk score (PRS), on brain function was measured by resting-state functional connectivity (rs-FC) of cerebrocerebellar circuits. Mediation analyses were conducted to evaluate the association between NRXN1, functional abnormality, and ADHD diagnosis, as well as ADHD symptoms. The results were validated by bootstrapping and 10,000 times permutation tests. The rs-FC analyses demonstrated significant mediation models for ADHD diagnosis, and emphasized the involvement of cerebellum, middle cingulate gyrus and temporal gyrus, which are crucial parts of sensorimotor circuits. The current study suggested NRXN1 conferred risk for ADHD by regulating the function of sensorimotor circuits.
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Abbreviations
- MRI:
-
magnetic resonance imaging
- ROI:
-
region of interest
- PRS:
-
polygenic risk score
- rs-FC:
-
resting-state functional connectivity
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Acknowledgements
We thank all the patients who participated in this study, as well as the colleagues contributed in the data collection. Yuanxin Zhong: Conceptualization, Methodology, Data curation, Software, Writing- Original draft preparation, Writing- Reviewing and Editing. Li An: Data Collection. Yufeng Wang: Supervision. Li Yang: Supervision, Writing- Reviewing and Editing. Qingjiu Cao: Supervision, Validation, Writing- Reviewing and Editing.
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This work was supported by grants from National Key R&D Program of China (2016YFC1306103), National Natural Science Foundation of China (grant numbers: 81671358, 81873804, 81873803, 81761128035), the Major State Basic Research Development Program of China (973Program, 2014CB846100). Beijing Municipal Science and Technology Commission (Z181100001518005).
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Zhong, Y., An, L., Wang, Y. et al. Functional abnormality in the sensorimotor system attributed to NRXN1 variants in boys with attention deficit hyperactivity disorder. Brain Imaging and Behavior 16, 967–976 (2022). https://doi.org/10.1007/s11682-021-00579-5
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DOI: https://doi.org/10.1007/s11682-021-00579-5