Logo image
Fine Mapping of Progressive Pseudorheumatoid Dysplasia: A Tool for Heterozygote Identification
Journal article

Fine Mapping of Progressive Pseudorheumatoid Dysplasia: A Tool for Heterozygote Identification

ASEM ALKBATEEB, JAMIL AL-ALAMI, SUZANNE M LEAL and HATEM EL-SHANTI
Genetic testing, Vol.3(4), pp.329-333
1999
DOI: 10.1089/gte.1999.3.329
PMCID: PMC6141022
PMID: 10627939

View Online

Abstract

Progressive pseudorheumatoid dysplasia is a skeletal genetic disorder affecting primarily the articular carti lage, causing joint stiffness and leading to a crippling status. More than two-thirds of the reported patients belong to Arab and Mediterranean populations. The disease locus has been mapped to chromosome 6q22 in a region of 12.9 cM using a Jordanian family. We examined two additional families, one Jordanian and one Palestinian, to test for homogeneity of the disorder and the presence of a common haplotype, to fine map the disorder, and to use all the information to derive a tool for hétérozygote identification. The two families showed linkage to the same previously reported locus, thus suggesting homogeneity, but they did not share a common haplotype. They also provided information that refined the genetic region for the disease locus to 2.1 cM with three microsatellite markers. The absence of a common haplotype indicates that no common ancestor mutations were inherited by our patients. Genotyping for the three-marker haplotype showed that it can be used as a heterozygote identification tool.

Details

Metrics

17 Record Views
Logo image