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Trisomy of the short stature homeobox-containing gene (SHOX), resulting from a duplication-deletion of the X chromosome

Lookup NU author(s): Dr Karen Adamson, Ian Cross, Dr Stephen Ball

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Abstract

The Turner syndrome (TS) is a complex disorder associated with almost invariant short stature and gonadal dysgenesis, as well as a variety of other major organ malformations. Recently, a homeobox-containing gene entitled short-stature homeobox-containing gene (SHOX), was isolated from a minimal short stature gene interval from the pseudoautosomal region of Xp (and Yp). Together with the demonstrable escape of SHOX from X-inactivation, this suggested SHOX to be a strong candidate gene for the short stature component of TS, and as SHOX haploinsufficiency appears to be the molecular basis of a mesomelic short statured skeletal dysplasia (Leri-Weill syndrome), this suggested that SHOX protein expression levels may confer a dosage effect on human stature. However, in this communication we report a normal statured female with gonadal dysgenesis, due to the inheritance of a recombinant duplication-deletion X-chromosome. The karyotype of the proband was 46,X,rec(X)dup-(Xp)inv(X)(p11.22q21.2)mat and fluorescent in situ hybridization of her metaphases with a SHOX cosmid confirmed the proband to be trisomic for SHOX. This communication suggests the relationship between levels of SHOX expression and human stature to be more complex than envisaged previously. The presence of normal stature in our patient rather than tall stature is likely to represent the natural variation seen in patients with transcription factor disorders.


Publication metadata

Author(s): Adamson KA, Cross I, Batch JA, Rappold GA, Glass IA, Ball SG

Publication type: Article

Publication status: Published

Journal: Clinical Endocrinology

Year: 2002

Volume: 56

Issue: 5

Pages: 671-675

Print publication date: 01/01/2002

ISSN (print): 0300-0664

ISSN (electronic): 1365-2265

Publisher: Wiley-Blackwell Publishing

URL: http://dx.doi.org/10.1046/j.1365-2265.2002.01504.x

DOI: 10.1046/j.1365-2265.2002.01504.x

PubMed id: 12035792


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