Identification of a Major Recombination Hotspot in Patients with Short Stature and SHOX Deficiency

Overview

Journal Am J Hum Genet

Publisher Cell Press

Specialty Genetics

Date 2005 Jun 3

PMID 15931595

Citations 14

Authors

Katja U Schneider

Nitin Sabherwal

Karin Jantz

Ralph Roth

Nadja Muncke

Werner F Blum

Gordon B Cutler Jr

Gudrun Rappold

Affiliations

Soon will be listed here.

Abstract

Human growth is influenced not only by environmental and internal factors but also by a large number of different genes. One of these genes, SHOX, is believed to play a major role in growth, since defects in this homeobox-containing gene on the sex chromosomes lead to syndromal short stature (Leri-Weill dyschondrosteosis, Langer mesomelic dysplasia, and Turner syndrome) as well as to idiopathic short stature. We have analyzed 118 unrelated patients with Leri-Weill dyschondrosteosis and >1,500 patients with idiopathic short stature for deletions encompassing SHOX. Deletions were detected in 34% of the patients with Leri-Weill dyschondrosteosis and in 2% of the patients with idiopathic short stature. For 27 patients with Leri-Weill dyschondrosteosis and for 6 with idiopathic short stature, detailed deletion mapping was performed. Analysis was performed by polymerase chain reaction with the use of pseudoautosomal polymorphic markers and by fluorescence in situ hybridization with the use of cosmid clones. Here, we show that, although the identified deletions vary in size, the vast majority (73%) of patients tested share a distinct proximal deletion breakpoint. We propose that the sequence present within this proximal deletion breakpoint "hotspot" region predisposes to recurrent breaks.

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