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An eighth locus for autosomal dominant retinitis pigmentosa is linked to chromosome 17q. 1995

S Bardien, and N Ebenezer, and J Greenberg, and C F Inglehearn, and L Bartmann, and R Goliath, and P Beighton, and R Ramesar, and S S Bhattacharya
Department of Human Genetics, University of Cape Town Medical School, Observatory, South Africa.

Retinitis pigmentosa is one of the most common causes of severe visual handicap in middle to late life. Prior to this report, seven loci had previously been mapped for the autosomal dominant form of this disorder (adRP). We now report the identification of a novel adRP locus on chromosome 17q. To map the new locus, we performed linkage analysis with microsatellite markers in a large South African kindred. After exclusion of 13 RP candidate gene loci (including rhodopsin and peripherin-RDS), we obtained significant positive lod scores at zero recombination fraction (theta = 0) for D17S808 (Z = 4.63) and D17S807 (Z = 5.69). Multipoint analysis gave a maximum lod score of 8.28 between these two markers. From haplotype analysis, the disease locus lies in the interval between markers D17S809 and D17S942. Three candidate genes for retinal dystrophies map to this chromosomal region and these genes are currently being investigated for possible involvement with adRP in this family.

UI MeSH Term Description Entries
D008040 Genetic Linkage The co-inheritance of two or more non-allelic GENES due to their being located more or less closely on the same CHROMOSOME. Genetic Linkage Analysis,Linkage, Genetic,Analyses, Genetic Linkage,Analysis, Genetic Linkage,Genetic Linkage Analyses,Linkage Analyses, Genetic,Linkage Analysis, Genetic
D008126 Lod Score The total relative probability, expressed on a logarithmic scale, that a linkage relationship exists among selected loci. Lod is an acronym for "logarithmic odds." Lod Scores,Score, Lod,Scores, Lod
D008297 Male Males
D010375 Pedigree The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition. Family Tree,Genealogical Tree,Genealogic Tree,Genetic Identity,Identity, Genetic,Family Trees,Genealogic Trees,Genealogical Trees,Genetic Identities,Identities, Genetic,Tree, Family,Tree, Genealogic,Tree, Genealogical,Trees, Family,Trees, Genealogic,Trees, Genealogical
D002874 Chromosome Mapping Any method used for determining the location of and relative distances between genes on a chromosome. Gene Mapping,Linkage Mapping,Genome Mapping,Chromosome Mappings,Gene Mappings,Genome Mappings,Linkage Mappings,Mapping, Chromosome,Mapping, Gene,Mapping, Genome,Mapping, Linkage,Mappings, Chromosome,Mappings, Gene,Mappings, Genome,Mappings, Linkage
D002886 Chromosomes, Human, Pair 17 A specific pair of GROUP E CHROMOSOMES of the human chromosome classification. Chromosome 17
D005260 Female Females
D005799 Genes, Dominant Genes that influence the PHENOTYPE both in the homozygous and the heterozygous state. Conditions, Dominant Genetic,Dominant Genetic Conditions,Genetic Conditions, Dominant,Condition, Dominant Genetic,Dominant Gene,Dominant Genes,Dominant Genetic Condition,Gene, Dominant,Genetic Condition, Dominant
D006239 Haplotypes The genetic constitution of individuals with respect to one member of a pair of allelic genes, or sets of genes that are closely linked and tend to be inherited together such as those of the MAJOR HISTOCOMPATIBILITY COMPLEX. Haplotype
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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