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- W2236157085 abstract "<h3>Objective:</h3> To determine the motor-behavioral and neural correlates of putative functional common variants in the sodium-channel Na<sub>V</sub>1.8 encoding gene (<i>SCN10A</i>) in vivo in patients with multiple sclerosis (MS). <h3>Methods:</h3> We recruited 161 patients with relapsing-onset MS and 94 demographically comparable healthy participants. All patients with MS underwent structural MRI and clinical examinations (Expanded Disability Status Scale [EDSS] and Multiple Sclerosis Functional Composite [MSFC]). Whole-brain voxel-wise and cerebellar volumetry were performed to assess differences in regional brain volumes between genotype groups. Resting-state fMRI was acquired from 62 patients with MS to evaluate differences in cerebellar functional connectivity. All participants were genotyped for 4 potentially functional <i>SCN10A</i> polymorphisms. <h3>Results:</h3> Two <i>SCN10A</i> polymorphisms in high linkage disequilibrium (<i>r</i><sup>2</sup> = 0.95) showed significant association with MSFC performance in patients with MS (rs6795970: <i>p</i> = 6.2 × 10<sup>−4</sup>; rs6801957: <i>p</i> = 0.0025). Patients with MS with rs6795970<sup>AA</sup> genotype performed significantly worse than rs6795970<sup>G</sup> carriers in MSFC (<i>p</i> = 1.8 × 10<sup>−4</sup>) and all of its subscores. This association was independent of EDSS and cerebellar atrophy. Although the genotype groups showed no difference in regional brain volumes, rs6795970<sup>AA</sup> carriers demonstrated significantly diminished cerebellar functional connectivity with the thalami and midbrain. No significant <i>SCN10A</i>–genotype effect was observed on MSFC performance in healthy participants. <h3>Conclusions:</h3> Our data suggest that <i>SCN10A</i> variation substantially influences functional status, including prominent effects on motor coordination in patients with MS. These findings were supported by the effects of this variant on a neural system important for motor coordination, namely cerebello-thalamic circuitry. Overall, our findings add to the emerging evidence that suggests that sodium channel Na<sub>V</sub>1.8 could serve as a target for future drug-based interventions to treat cerebellar dysfunction in MS." @default.
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- W2236157085 date "2016-01-06" @default.
- W2236157085 modified "2023-10-16" @default.
- W2236157085 title "Channelopathy-related<i>SCN10A</i>gene variants predict cerebellar dysfunction in multiple sclerosis" @default.
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- W2236157085 doi "https://doi.org/10.1212/wnl.0000000000002326" @default.
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