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Global prevalence of potentially pathogenic short-tandem repeats in an epilepsy cohort

Moreau, C.; Michaud, J. L.; Hamdan, F. F.; Bouchard, J.; Tremblay, V.; Rouleau, G. A.; Minassian, B. A.; Cossette, P.; Girard, S. L.

2020-08-21 genetics
10.1101/2020.08.20.259168 bioRxiv
Show abstract

This study aims to decipher the role of short tandem repeats (STRs) in epilepsy patients. Whole genome short-read sequencing data of 734 epileptic patients was used to look for known STR expansions associated with increased risk of neurodevelopmental diseases or epilepsy using three different software. Results show one hit of particular interest on ARX gene associated with Early Infantile Encephalopathic Epilepsy that could be causal for one patient with developmental and epileptic encephalopathy. However, we show that the different software do not agree on most of the calls above the threshold and that experimental validation is still needed for diagnostic, although these algorithms could prove useful for pre-selection of samples to be validated.

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