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Human Molecular Genetics Advance Access published online on August 11, 2006
Human Molecular Genetics, doi:10.1093/hmg/ddl218
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© The Author 2006. Published by Oxford University Press. All rights reserved
Received June 24, 2006
Revised August 2, 2006
Accepted August 2, 2006

Article

Evidence for involvement of the vitamin D receptor gene in idiopathic short stature via a genome wide linkage study and subsequent association studies

Astrid Dempfle 1 *, Stefan A. Wudy 2, Kathrin Saar 3, Sandra Hagemann 2, Susann Friedel 4, André Scherag 5, Lars D. Berthold 6, Gerhard Alzen 6, Ludwig Gortner 7, Werner F. Blum 8, Anke Hinney 4, Peter Nürnberg 9, Helmut Schaüfer 5, and Johannes Hebebrand 4

1 Institute of Medical Biometry and Epidemiology, Philipps-University Marburg, Bunsenstr. 3, 35037 Marburg, Germany
2 Pediatric Endocrinology and Diabetology, Center of Child and Adolescent Medicine, Justus Liebig-University Gießen, Germany
3 Molecular Genetics and Gene Mapping Center, Max Delbrück Center, Berlin, Germany
4 Department of Child and Adolescent Psychiatry and Psychotherapy, University Duisburg-Essen, Germany
5 Institute of Medical Biometry and Epidemiology, Philipps-University Marburg, Germany
6 Pediatric Radiology, Center of Radiology, Justus Liebig-University Gießen, Germany
7 Department of General Pediatrics and Neonatology, University of Saarland, Homburg, Germany
8 Pediatric Endocrinology and Diabetology, Center of Child and Adolescent Medicine, Justus Liebig-University Gießen, Germany; Eli Lilly & Company, Bad Homburg, Germany
9 Cologne Center for Genomics and Institute for Genetics, University of Cologne, Germany

* To whom correspondence should be addressed.
Astrid Dempfle, E-mail: dempfle{at}med.uni-marburg.de


  Abstract

Stature is a highly heritable trait under both polygenic and major gene control. We aimed to identify genetic regions linked to idiopathic short stature (ISS) in childhood, through a whole genome scan in 92 families each with two affected children with ISS, including constitutional delay of growth and puberty and familial short stature. Linkage analysis was performed for ISS, height and bone age retardation. Chromosome 12q11 showed significant evidence of linkage to ISS and height (maximum non-parametric multipoint LOD scores 3.18 and 2.31 at 55-58 cM, between D12S1301 and D12S1048), especially in sister-sister pairs (LOD score of 1.9 for ISS in 22 pairs). These traits were also linked to chromosomes 1q12 and 2q36. The region on chromosome 12q11 had previously shown significant linkage to adult stature in several genome scans and harbors the vitamin D receptor gene, which has been associated with variation in height. A SNP (rs10735810, FokI), which leads to a functionally relevant alteration at the protein level, showed preferential transmission of the transcriptionally more active G-allele to affected children (p = 0.04) and seems to be responsible for the observed linkage (p = 0.05, GIST test). Bone age retardation showed moderate linkage to chromosomes 19p11-q11 and 7p14 (LOD scores 1.69 at 57 cM and 1.42 at 50 cM), but there was no clear overlap with linkage regions for stature. In conclusion, we identified significant linkage, which might be due to a functional SNP in the vitamin D receptor gene and could be responsible for up to 34% of ISS cases in the population.


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