title: Detection of SHOX gene aberrations in routine diagnostic practice and evaluation of phenotype scoring form effectiveness.
abstract: Heterozygous aberrations of SHOX gene have been reported to be responsible for Léri-Weill dyschondrosteosis (LWD) and small portion of idiopathic short stature. The study was established to assess effectiveness of using phenotype 'scoring form' in patients indicated for SHOX gene defect analysis. The submitted study is based on a retrospective group of 352 unrelated patients enrolled as a part of the routine diagnostic practice and analyzed for aberrations affecting the SHOX gene. All participants were scanned for deletion/duplication within the main pseudoautosomal region (PAR1) using the multiplex ligation-dependent probe amplification (MLPA) method. The phenotype 'scoring form' is used in our laboratory practice to preselect patients for subsequent mutation analysis of SHOX gene-coding sequences. The overall detection rate was 11.1% but there was a significant increase in frequency of SHOX gene defect positive with increasing achieved score (P<0.0001). The most frequent aberration was a causal deletion within PAR1. In three probands, MLPA analysis indicated a more complex rearrangement. Madelung deformity or co-occurrence of disproportionate short stature, short forearm and muscular hypertrophy had represented the most potent markers to determine the likelihood of SHOX gene defect detection. We conclude that appliance of phenotype 'scoring form' had saved excessive sample analysis and enabled effective routine diagnostic testing.
authors.affiliation: Institute of Biology and Medical Genetics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic.
authors.forename: Katerina
authors.initials: K
authors.lastname: Hirschfeldova
authors.affiliation: Institute of Biology and Medical Genetics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic.
authors.forename: Martina
authors.initials: M
authors.lastname: Florianova
authors.affiliation: Institute of Biology and Medical Genetics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic.
authors.forename: Vera
authors.initials: V
authors.lastname: Kebrdlova
authors.affiliation: Institute of Biology and Medical Genetics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic.
authors.forename: Marketa
authors.initials: M
authors.lastname: Urbanova
authors.affiliation: Institute of Biology and Medical Genetics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic.
authors.forename: Jitka
authors.initials: J
authors.lastname: Stekrova
mesh_terms: D001827:Body Height / Q000235:genetics; D004252:DNA Mutational Analysis / Q000379:methods*; D004392:Dwarfism / Q000235:genetics; D020440:Gene Duplication / Q000235:genetics*; D005820:Genetic Testing; D006130:Growth Disorders / Q000175:diagnosis* / Q000235:genetics*; D018398:Homeodomain Proteins / Q000235:genetics*; D006801:Humans; D060885:Multiplex Polymerase Chain Reaction; D021141:Nucleic Acid Amplification Techniques; D010009:Osteochondrodysplasias / Q000175:diagnosis* / Q000235:genetics*; D010641:Phenotype; D012189:Retrospective Studies; D017384:Sequence Deletion / Q000235:genetics*; D000074122:Short Stature Homeobox Protein
chemical_list: D018398:Homeodomain Proteins; C106071:SHOX protein, human; D000074122:Short Stature Homeobox Protein