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Neurological Sciences

Erschienen in:

23.06.2021 | Original Article

Biallelic ADGRV1 variants are associated with Rolandic epilepsy

verfasst von: Zhigang Liu, Xingguang Ye, Jieyan Zhang, Benze Wu, Shiwei Dong, Pingming Gao

Erschienen in: Neurological Sciences | Ausgabe 2/2022

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Abstract

Objective

Rolandic epilepsy (RE) is among the most common focal epilepsies in childhood. For the majority of patients with RE and atypical RE (ARE), the etiology remains elusive. We thus screened patients with RE/ARE in order to detect disease-causing variants..

Methods

A trios-based whole-exome sequencing approach was performed in a cohort of 28 patients with RE/ARE. Clinical data and EEGs were reviewed. Variants were validated by Sanger sequencing.

Results

Two compound heterozygous missense variants p.Val272Ile/p.Asn3028Ser and p.Ala3657Val/p.Met4419Val of ADGRV1 were identified in two unrelated familial cases of RE/ARE. All the variants were in the calcium exchanger β domain and were suggested to be damaging by at least one web-based prediction tool. These variants are not present or are present at a very low minor allele frequency in the gnomAD database. Previously, biallelic ADGRV1 variants (p.Gly2756Arg and p.Glu4410Lys) have been observed in RE, consistent with the observation in this study and supporting the association between ADGRV1 variants and RE. Additionally, a de novo mutation, p.Asp668Asn, in GRIN2B was identified in a sporadic case of ARE, and a missense variant, p.Asn1551Ser, in RyR2 was identified in a family with RE with incomplete penetrance. These genes are all calcium homeostasis associated genes, suggesting the potential effect of calcium homeostasis in RE/ARE.

Conclusions

The results from the present study suggest that the genes ADGRV1, GRIN2B, and RyR2 are associated with RE/ARE. These data link defects in neuronal intracellular calcium homeostasis to RE/ARE pathogenesis implicating that these defects plays an important role in the development of these conditions.

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Titel: Biallelic ADGRV1 variants are associated with Rolandic epilepsy
verfasst von: Zhigang Liu
Xingguang Ye
Jieyan Zhang
Benze Wu
Shiwei Dong
Pingming Gao
Publikationsdatum: 23.06.2021
Verlag: Springer International Publishing
Erschienen in: Neurological Sciences / Ausgabe 2/2022
Print ISSN: 1590-1874
Elektronische ISSN: 1590-3478
DOI: https://doi.org/10.1007/s10072-021-05403-y

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