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Combined approach for finding susceptibility genes in DISH/chondrocalcinosis families: whole-genome-wide linkage and IBS/IBD studies

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Couto, AR, Parreira, B, Thomson, R, Soares, M, Power, DM, Stankovich, J ORCID: 0000-0001-9344-7749, Armas, JB and Brown, MA 2017 , 'Combined approach for finding susceptibility genes in DISH/chondrocalcinosis families: whole-genome-wide linkage and IBS/IBD studies' , Human Genome Variation, vol. 4 , pp. 1-7 , doi: 10.1038/hgv.2017.41.

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Abstract

Twelve families with exuberant and early-onset calcium pyrophosphate dehydrate chondrocalcinosis (CC) and diffuse idiopathic skeletal hyperostosis (DISH), hereafter designated DISH/CC, were identified in Terceira Island, the Azores, Portugal. Ninety-two (92) individuals from these families were selected for whole-genome-wide linkage analysis. An identity-by-descent (IBD) analysis was performed in 10 individuals from 5 of the investigated pedigrees. The chromosome area with the maximal logarithm of the odds score (1.32; P=0.007) was not identified using the IBD/identity-by-state (IBS) analysis; therefore, it was not investigated further. From the IBD/IBS analysis, two candidate genes, LEMD3 and RSPO4, were identified and sequenced. Nine genetic variants were identified in the RSPO4 gene; one regulatory variant (rs146447064) was significantly more frequent in control individuals than in DISH/CC patients (P=0.03). Four variants were identified in LEMD3, and the rs201930700 variant was further investigated using segregation analysis. None of the genetic variants in RSPO4 or LEMD3 segregated within the studied families. Therefore, although a major genetic effect was shown to determine DISH/CC occurrence within these families, the specific genetic variants involved were not identified.

Item Type: Article
Authors/Creators:Couto, AR and Parreira, B and Thomson, R and Soares, M and Power, DM and Stankovich, J and Armas, JB and Brown, MA
Journal or Publication Title: Human Genome Variation
Publisher: Nature Publishing Group
ISSN: 2054-345X
DOI / ID Number: 10.1038/hgv.2017.41
Copyright Information:

© The Author(s) 2017. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) http://creativecommons.org/licenses/by-nc-nd/4.0/

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