title: 5q12.1 deletion: delineation of a phenotype including mental retardation and ocular defects.
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.
authors: Cytogenetics Department, Pontchaillou University Hospital, Rennes, France. sylvie.jaillard@chu-rennes.fr
authors: Sylvie
authors: S
authors: Jaillard
authors: Joris
authors: J
authors: Andrieux
authors: Ghislaine
authors: G
authors: Plessis
authors: Ana C V
authors: AC
authors: Krepischi
authors: Josette
authors: J
authors: Lucas
authors: Véronique
authors: V
authors: David
authors: Marine
authors: M
authors: Le Brun
authors: Debora R
authors: DR
authors: Bertola
authors: Albert
authors: A
authors: David
authors: Marc-Antoine
authors: MA
authors: Belaud-Rotureau
authors: Jean
authors: J
authors: Mosser
authors: Leila
authors: L
authors: Lazaro
authors: Catherine
authors: C
authors: Treguier
authors: Carla
authors: C
authors: Rosenberg
authors: Sylvie
authors: S
authors: Odent
authors: Christèle
authors: C
authors: Dubourg