None of the authors has any conflict of interest to disclose.
Interstitial Duplication of 2q32.1–q33.3 in a Patient With Epilepsy, Developmental Delay, and Autistic Behavior
Article first published online: 5 MAR 2013
Copyright © 2012 Wiley Periodicals, Inc.
American Journal of Medical Genetics Part A
Volume 161, Issue 5, pages 1078–1084, May 2013
How to Cite
2012. Interstitial duplication of 2q32.1–q33.3 in a patient with epilepsy, developmental delay, and autistic behavior. Am J Med Genet Part A 161A:1078–1084., , , , , , , , , .
- Issue published online: 22 APR 2013
- Article first published online: 5 MAR 2013
- Manuscript Accepted: 23 AUG 2012
- Manuscript Received: 8 MAY 2012
- Grant-in-Aid for Scientific Research (C)
- Japan Society for the Promotion of Science (JSPS)
- 2q32–q33 duplication;
- psychomotor developmental delay;
- autistic behavior;
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. © 2013 Wiley Periodicals, Inc.