Delineation of the 3p14.1p13 microdeletion associated with syndromic distal limb contractures

Julien Thevenon, Nicole Monnier, Patrick Callier, Klaus Dieterich, Michel Francoise, Tara Montgomery, Susanne Kjaergaard, Katherine Neas, Joanne Dixon, Thomas Lee Dahm, Frédéric Huet, Clémence Ragon, Anne-Laure Mosca-Boidron, Nathalie Marle, Laurence Duplomb, Marie-Hélène Aubriot-Lorton, Francine Mugneret, Steve A Vokes, Haley W Tucker, Joël LunardiLaurence Faivre, Pierre Simon Jouk, Christel Thauvin-Robinet

4 Citationer (Scopus)

Abstract

Distal limb contractures (DLC) represent a heterogeneous clinical and genetic condition. Overall, 20-25% of the DLC are caused by mutations in genes encoding the muscle contractile apparatus. Large interstitial deletions of the 3p have already been diagnosed by standard chromosomal analysis, but not associated with a specific phenotype. We report on four patients with syndromic DLC presenting with a de novo 3p14.1p13 microdeletion. The clinical features associated multiple contractures, feeding problems, developmental delay, and intellectual disability. Facial dysmorphism was constant with low-set posteriorly rotated ears and blepharophimosis. Review of previously reported cases with a precise mapping of the deletions, documented a 250 kb smallest region of overlap (SRO) necessary for DLC. This region contained one gene, EIF4E3, the first three exons of the FOXP1 gene, and an intronic enhancer of FOXP1 named hs1149. Sanger sequencing and locus quantification of hs1149, EIF4E3, and FOXP1 in a cohort of 11 French patients affected by DLC appeared normal. In conclusion, we delineate a new microdeletion syndrome involving the 3p14.1p13 locus and associated with DLC and severe developmental delay.

OriginalsprogEngelsk
TidsskriftAmerican Journal of Medical Genetics. Part A
Vol/bind164A
Udgave nummer12
Sider (fra-til)3027-34
Antal sider8
ISSN1552-4825
DOI
StatusUdgivet - dec. 2014

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