[Neurodevelopmental impact of a mutation in the RHOBTB2 gene].

RHOBTB2 was first described as epileptogenic when it presents a missense variant in 2016 and studied more specifically in 2018. It is a gene that causes rare, but potentially severe childhood epileptic encephalopathy. In 2021, research confirmed that heterozygous mutations of RHOBTB2 included other clinical signs besides these encephalopathies. Thus, these infantile epilepsies are mainly associated with highly variable phenotypes, with developmental delay, post-traumatic encephalitis, paroxysmal movement disorders and iconographic brain damage. In this work, after presenting a clinical case, we will recall the role of RhoGTPases on neuronal development. We will then discuss a study which highlighted the neurodevelopmental impact of mutations on the RHOBTB2 gene by carrying out work on Drosophila melanogaster flies. Finally, we will compare the presented clinical case with a literature review.