ARX, a novel Prd-class-homeobox gene highly expressed in the telencephalon, is mutated in X-linked mental retardation
Date
2002
Authors
Bienvenu, T.
Poirier, K.
Friocourt, G.
Bahi, N.
Beaumont, D.
Fauchereau, F.
Jeema, L.
Zemni, R.
Vinet, M.
Francis, F.
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Journal article
Citation
Human Molecular Genetics, 2002; 11(8):981-991
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Thierry Bienvenu, Karine Poirier, Gaelle Friocourt, Nadia Bahi, Delphine Beaumont, Fabien Fauchereau, Lamia Ben Jeema, Ramzi Zemni, Marie-Claude Vinet, Fiona Francis, Philippe Couvert, Marie Gomot, Claude Moraine, Hans van Bokhoven, Vera Kalscheuer, Suzanne Frints, Josef Gecz, Kanae Ohzaki, Habiba Chaabouni, Jean-Pierre Fryns, Vincent Desportes, Cherif Beldjord and Jamel Chelly
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Abstract
Investigation of a critical region for an X-linked mental retardation (XLMR) locus led us to identify a novel Aristaless related homeobox gene (ARX ). Inherited and de novo ARX mutations, including missense mutations and in frame duplications/insertions leading to expansions of polyalanine tracts in ARX, were found in nine familial and one sporadic case of MR. In contrast to other genes involved in XLMR, ARX expression is specific to the telencephalon and ventral thalamus. Notably there is an absence of expression in the cerebellum throughout development and also in adult. The absence of detectable brain malformations in patients suggests that ARX may have an essential role, in mature neurons, required for the development of cognitive abilities.
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Copyright © 2002 Oxford University Press