Investigating the pathogenic role of polyalanine tract expansion mutations in the ARX homeobox transcription factor.

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Intellectual disability is frequent in the population, with as many as 1 in every 50 people in the world directly affected. ARX is one of the most frequent genes mutated in X chromosome-linked intellectual disability. Our study will specifically address the functional impact of these mutations in ARX using cell models relevant to the brain. We will also examine the contribution of other genetic changes to explain the very different symptoms seen in patients with the same gene mutation.