title: Interstitial duplication of 2q32.1-q33.3 in a patient with epilepsy, developmental delay, and autistic behavior.
abstract: Duplications of the 2q33 region are rare; to date, only 13 patients have been reported to have this chromosomal abnormality. The reported duplications are of varying size, and the patients shared developmental delay and minor dysmorphic findings. In this study, we identified a duplication of 2q32.1-q33.3 in a patient with psychomotor developmental delay, epilepsy, and autistic behavior. The duplicated region of this patient was reciprocal to the 2q32-q33 deletion syndrome. Chromosomal microarray testing confirmed the 19.5 Mb of duplication that includes over 100 genes, some of which could have functional relevance to the neurological features of this patient. The SATB homeobox 2 gene (SATB2)-the primary gene responsible for the 2q32-q33 deletion syndrome-may be one of them, because of its expression in the cortical projection neurons of the developing brain. The duplication of the potassium channel tetramerisation domain-containing 18 gene (KCTD18) and the ADAM metallopeptidase domain 23 gene (ADAM23) may also contribute to the phenotype. FISH analysis confirmed a tandem configuration of the duplicated segments. This result is in agreement with our previous study, in which we observed that duplicated segments as interstitial duplications are generally inserted in the tandem configuration.
authors: National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan.
authors: Daisuke
authors: D
authors: Usui
authors: Shino
authors: S
authors: Shimada
authors: Keiko
authors: K
authors: Shimojima
authors: Midori
authors: M
authors: Sugawara
authors: Hajime
authors: H
authors: Kawasaki
authors: Hideo
authors: H
authors: Shigematu
authors: Yukitoshi
authors: Y
authors: Takahashi
authors: Yushi
authors: Y
authors: Inoue
authors: Katsumi
authors: K
authors: Imai
authors: Toshiyuki
authors: T
authors: Yamamoto
mesh_terms: D001321:Autistic Disorder / Q000235:genetics*; D002675:Child, Preschool; D002889:Chromosomes, Human, Pair 2 / Q000235:genetics; D003937:Diagnosis, Differential; D004827:Epilepsy / Q000235:genetics*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D036961:Matrix Attachment Region Binding Proteins / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D014157:Transcription Factors / Q000235:genetics*; D014314:Trisomy / Q000175:diagnosis / Q000235:genetics*
chemical_list: D036961:Matrix Attachment Region Binding Proteins; C521297:SATB2 protein, human; D014157:Transcription Factors