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Molecular Genetics and Genomics

, Volume 293, Issue 3, pp 725–736 | Cite as

Genetic analysis of very obese children with autism spectrum disorder

  • Herman D. Cortes
  • Rachel Wevrick
Original Article

Abstract

Autism spectrum disorder (ASD) is defined by the triad of deficits in social interactions, deficits in communication, and repetitive behaviors. Common co-morbidities in syndromic forms of ASD include intellectual disability, seizures, and obesity. We asked whether very obese children with ASD had different behavioral, physical and genetic characteristics compared to children with ASD who were not obese. We found that very obese children with ASD had significantly poorer scores on standardized behavioral tests. Very obese boys with ASD had lower full scale IQ and increased impairments with respect to stereotypies, communication and social skills. Very obese girls with ASD had increased impairments with respect to irritability and oppositional defiant behavior. We identified genetic lesions in a subset of the children with ASD and obesity and attempted to identify enriched biological pathways. Our study demonstrates the value of identifying co-morbidities in children with ASD as we move forward towards understanding the biological processes that contribute to this complex disorder and prepare to design customized treatments that target the diverse genetic lesions present in individuals with ASD.

Keywords

SSC Autism spectrum disorder Obesity Wnt Gene Ontology 

Abbreviations

ABC

Aberrant Behavior Checklist

ADI

Autism Diagnostic Interview

ASD

Autism spectrum disorder

BMI

Body mass index,

CBCL 6–18

Child Behavior Checklist

dnCNVs

De novo copy number variants

dnLGD

De novo likely gene disrupting

dnNSC

De novo non-synonymous coding mutations

ExAC

Exome Aggregation Consortium

FSIQ

Full scale IQ

GO

Gene Ontology

ID

Intellectual disability

LoF

Loss of function

PCP

Planar cell polarity

PWS

Prader–Willi syndrome

SSC

Simons Simplex Collection

VABS

Vineland Adaptive Behavior Rating Scales

Notes

Acknowledgements

We are grateful to all of the families at the participating Simons Simplex Collection (SSC) sites, as well as the principal investigators (A. Beaudet, R. Bernier, J. Constantino, E. Cook, E. Fombonne, D. Geschwind, R. Goin-Kochel, E. Hanson, D. Grice, (A) Klin, D. Ledbetter, C. Lord, C. Martin, D. Martin, R. Maxim, J. Miles, O. Ousley, K. Pelphrey, (B) Peterson, J. Piggot, (C) Saulnier, M. State, W. Stone, J. Sutcliffe, C. Walsh, Z. Warren, E. Wijsman). We appreciate obtaining access to phenotypic data on SFARI Base. Approved researchers can obtain the SSC population dataset described in this study by applying at https://base.sfari.org. We are grateful to the Prader–Willi Association of Alberta for their donation in support of our research on autism spectrum disorders.

Author contributions

HDC and RW analyzed and interpreted the mutation data and wrote the manuscript. Both authors read and approved the final manuscript.

Funding

This work was supported by a Grant from the Simons Foundation for Autism Research (SFARIPA304216, to RW).

Compliance with ethical standards

Conflict of interest

H. D. Cortes declares that he has no conflict of interest. R. Wevrick declares that she has no conflict of interest.

Ethics approval and consent to participate

“All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.” Use of SSC data from human subjects was approved by the Health Research Ethics Board-Biomedical Panel of the University of Alberta, Edmonton, Alberta Canada. This article does not contain any studies with animals performed by any of the authors.

Availability of data and material

The data that support the findings of this study are available from the Simons Foundation but restrictions apply to the availability of these data, which were used under license for the current study. Data are however available from the authors upon reasonable request and with permission of the Simons Foundation.

Supplementary material

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Supplementary material 1 (XLSX 63 KB)
438_2018_1418_MOESM2_ESM.xlsx (23 kb)
Supplementary material 2 (XLSX 22 KB)
438_2018_1418_MOESM3_ESM.pdf (156 kb)
Supplementary material 3 (PDF 155 KB)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Medical GeneticsUniversity of AlbertaEdmontonCanada

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