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Int. J. Mol. Sci. 2015, 16(3), 5697-5713; doi:10.3390/ijms16035697

Whole Exome Sequencing for a Patient with Rubinstein-Taybi Syndrome Reveals de Novo Variants besides an Overt CREBBP Mutation

1
Department of Psychiatry, Seoul National University Hospital, Seongnam, Gyeonggi 463-707, Korea
2
Department of Psychiatry, Seoul National University, College of Medicine, Seoul 110-744, Korea
3
Epigenomics Research Center, Genome Institute, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea
4
Department of Biomedical Informatics, Ajou University, School of Medicine, Suwon 443-749, Korea
5
Simulacre Modeling Group, Seoul 140-897, Korea
6
Department of Pharmacology, Eulji University College of Medicine, Daejeon 301-746, Korea
7
Department of Biomedical Science, Ajou University Graduate School of Medicine, Suwon 443-749, Korea
8
Department of Otolaryngology, Seoul National University Hospital, Seongnam, Gyeonggi 463-707, Korea
These authors contributed equally to this work.
Deceased.
*
Author to whom correspondence should be addressed.
Academic Editor: Merlin G. Butler
Received: 29 December 2014 / Revised: 16 February 2015 / Accepted: 28 February 2015 / Published: 11 March 2015
View Full-Text   |   Download PDF [2854 KB, uploaded 11 March 2015]   |  

Abstract

Rubinstein-Taybi syndrome (RSTS) is a rare condition with a prevalence of 1 in 125,000–720,000 births and characterized by clinical features that include facial, dental, and limb dysmorphology and growth retardation. Most cases of RSTS occur sporadically and are caused by de novo mutations. Cytogenetic or molecular abnormalities are detected in only 55% of RSTS cases. Previous genetic studies have yielded inconsistent results due to the variety of methods used for genetic analysis. The purpose of this study was to use whole exome sequencing (WES) to evaluate the genetic causes of RSTS in a young girl presenting with an Autism phenotype. We used the Autism diagnostic observation schedule (ADOS) and Autism diagnostic interview revised (ADI-R) to confirm her diagnosis of Autism. In addition, various questionnaires were used to evaluate other psychiatric features. We used WES to analyze the DNA sequences of the patient and her parents and to search for de novo variants. The patient showed all the typical features of Autism, WES revealed a de novo frameshift mutation in CREBBP and de novo sequence variants in TNC and IGFALS genes. Mutations in the CREBBP gene have been extensively reported in RSTS patients, while potential missense mutations in TNC and IGFALS genes have not previously been associated with RSTS. The TNC and IGFALS genes are involved in central nervous system development and growth. It is possible for patients with RSTS to have additional de novo variants that could account for previously unexplained phenotypes. View Full-Text
Keywords: Rubinstein-Taybi syndrome (RSTS); Autism spectrum disorder (ASD); de novo variants; Tenascin C (TNC) gene; insulin-like growth factor-binding protein; acid labile subunit (IGFALS) gene; CREB (cAMP response element binding protein) binding protein (CREBBP) gene Rubinstein-Taybi syndrome (RSTS); Autism spectrum disorder (ASD); de novo variants; Tenascin C (TNC) gene; insulin-like growth factor-binding protein; acid labile subunit (IGFALS) gene; CREB (cAMP response element binding protein) binding protein (CREBBP) gene
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yoo, H.J.; Kim, K.; Kim, I.H.; Rho, S.-H.; Park, J.-E.; Lee, K.Y.; Kim, S.A.; Choi, B.Y.; Kim, N. Whole Exome Sequencing for a Patient with Rubinstein-Taybi Syndrome Reveals de Novo Variants besides an Overt CREBBP Mutation. Int. J. Mol. Sci. 2015, 16, 5697-5713.

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