These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Haplotype-specific linkage disequilibrium patterns define the genetic topography of the human MHC.
    Author: Ahmad T, Neville M, Marshall SE, Armuzzi A, Mulcahy-Hawes K, Crawshaw J, Sato H, Ling KL, Barnardo M, Goldthorpe S, Walton R, Bunce M, Jewell DP, Welsh KI.
    Journal: Hum Mol Genet; 2003 Mar 15; 12(6):647-56. PubMed ID: 12620970.
    Abstract:
    Detailed knowledge of linkage disequilibrium (LD) is regarded as a prerequisite for population-based disease gene mapping. Variable patterns across the human genome are now recognized, both between regions and populations. Here, we demonstrate that LD may also vary within a genomic region in a haplotype-specific manner. In 864 Caucasian unrelated individuals, we describe haplotype-specific LD patterns across the human MHC by the construction of gene-specific allelic haplotypes at 25 loci between HLA-A and Tapasin. Strong and extensive LD is found across both common and rare haplotypes, suggesting that haplotype structure is influenced by factors other than genetic drift, including both selection and differential haplotype recombination. Knowledge of haplotype-specific LD in the HLA may explain the apparent discrepant data from previous studies of global LD, help delineate key areas in mapping HLA-associated diseases and, together with recombination data, provide valuable information about a population's demographic history and the selective pressures operating on it.
    [Abstract] [Full Text] [Related] [New Search]