5q12.1 deletion: delineation of a phenotype including mental retardation and ocular defects. - Archive ouverte HAL Access content directly
Journal Articles American Journal of Medical Genetics Part A Year : 2011

5q12.1 deletion: delineation of a phenotype including mental retardation and ocular defects.

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Abstract

Array-CGH enables the detection of submicroscopic chromosomal deletions and duplications and leads to an accurate delineation of the imbalances, raising the possibility of genotype to phenotype and mapping minimal critical regions associated with particular patterns of clinical features. We report here on four patients sharing common clinical features (psychomotor retardation, coarse facies and ocular anomalies), with proximal 5q deletions identified by oligo array-CGH. The deletions range from 5.75 to 17.26-Mb in size and occurred de novo. A common 2.63-Mb region between the deletions described here can be defined in 5q12.1 (59,390,122-62,021,754 bp from 5pter, hg18) and includes 12 genes. Among them, KIF2A, which encodes a kinesin superfamily protein, is a particularly interesting candidate for the phenotype, as it suppresses the growth of axonal collateral branches and is involved in normal brain development. Ocular defects, albeit unspecific, seem to be common in the 5q12.1 deletion. Identification of additional cases of deletions involving the 5q12.1 region will allow more accurate genotype-phenotype correlations.

Dates and versions

inserm-00595096 , version 1 (23-05-2011)

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Sylvie Jaillard, Joris Andrieux, Ghislaine Plessis, Ana Cv Krepischi, Josette Lucas, et al.. 5q12.1 deletion: delineation of a phenotype including mental retardation and ocular defects.. American Journal of Medical Genetics Part A, 2011, 155A (4), pp.725-31. ⟨10.1002/ajmg.a.33758⟩. ⟨inserm-00595096⟩
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