Mahmood, T, El-Asrag, ME, Poulter, JA orcid.org/0000-0003-2048-5693 et al. (19 more authors) (2020) A recessively inherited risk locus on chromosome 13q22-31 conferring susceptibility to schizophrenia. Schizophrenia Bulletin. ISSN 0586-7614
Abstract
We report a consanguineous family in which schizophrenia segregates in a manner consistent with recessive inheritance of a rare, partial-penetrance susceptibility allele. From 4 marriages between 2 sets of siblings who are half first cousins, 6 offspring have diagnoses of psychotic disorder. Homozygosity mapping revealed a 6.1-Mb homozygous region on chromosome 13q22.2-31.1 shared by all affected individuals, containing 13 protein-coding genes. Microsatellite analysis confirmed homozygosity for the affected haplotype in 12 further apparently unaffected members of the family. Psychiatric reports suggested an endophenotype of milder psychiatric illness in 4 of these individuals. Exome and genome sequencing revealed no potentially pathogenic coding or structural variants within the risk haplotype. Filtering for noncoding variants with a minor allele frequency of <0.05 identified 17 variants predicted to have significant effects, the 2 most significant being within or adjacent to the SCEL gene. RNA sequencing of blood from an affected homozygote showed the upregulation of transcription from NDFIP2 and SCEL. NDFIP2 is highly expressed in brain, unlike SCEL, and is involved in determining T helper (Th) cell type 1 and Th2 phenotypes, which have previously been implicated with schizophrenia.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020. Published by Oxford University Press on behalf of the Maryland Psychiatric Research Center. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | consanguineous/endophenotype/homozygosity/ chromosome 13q/risk haplotype |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biomedical Sciences (Leeds) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Health Sciences (Leeds) > Academic Unit of Psychiatry and Behavioural Sciences (Leeds) |
Funding Information: | Funder Grant number Jules Thorn Charitable Trust NOT GIVEN MRC (Medical Research Council) MR/K011154/1 Wellcome Trust NOT GIVEN MRC (Medical Research Council) MR/J004391/1 Qatar National Research Fund NPRP7-1174-3 302 |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Oct 2020 09:48 |
Last Modified: | 13 Apr 2021 11:45 |
Status: | Published online |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/schbul/sbaa161 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:166401 |