SHOX haploinsufficiency and Leri-Weill dyschondrosteosis: prevalence and growth failure in relation to mutation, sex, and degree of wrist deformity

The Journal of Clinical Endocrinology and Metabolism
G BinderMichael B Ranke

Abstract

SHOX mutations causing haploinsufficiency were reported in Leri-Weill dyschondrosteosis (LWD), which is characterized by mesomelic short stature and Madelung deformity of the wrists. The aim of this study was to determine the prevalence of SHOX mutations in LWD and to investigate the degree of growth failure in relation to mutation, sex, age of menarche, and wrist deformity. We studied 20 families with 24 affected children (18 females) and nine affected parents (seven females). All patients presented with bilateral Madelung deformity and shortening of the limbs. Height, sitting height, parental height, birth length, age of menarche, and presence of minor abnormalities were recorded. The degree of Madelung deformity was estimated by analysis of left hand radiographs. Microsatellite typing of the SHOX locus was used for detection of SHOX deletions and PCR direct sequencing for the detection of SHOX point mutations. In 14 of 20 families (70%), SHOX mutations were detected, with seven deletions (four de novo) and seven point mutations (one de novo). The latter included five missense mutations of the SHOX homeodomain, one nonsense mutation (E102X) truncating the whole homeodomain, and one point mutation (X293R) causing a C-terminal ...Continue Reading

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