PMID- 15523649 OWN - NLM STAT- MEDLINE DCOM- 20051024 LR - 20221207 IS - 1098-1004 (Electronic) IS - 1059-7794 (Linking) VI - 24 IP - 6 DP - 2004 Dec TI - High-Density SNP genotyping defines 17 distinct haplotypes of the TNF block in the Caucasian population: implications for haplotype tagging. PG - 517-25 AB - The region spanning the tumor necrosis factor (TNF) cluster in the human major histocompatibility complex (MHC) has been implicated in susceptibility to numerous immunopathological diseases, including type 1 diabetes mellitus and rheumatoid arthritis. However, strong linkage disequilibrium across the MHC has hampered the identification of the precise genes involved. In addition, the observation of "blocks" of DNA in the MHC within which recombination is very rare, limits the resolution that may be obtained by genotyping individual SNPs. Hence a greater understanding of the haplotypes of the block spanning the TNF cluster is necessary. To this end, we genotyped 32 human leukocyte antigen (HLA)-homozygous workshop cell lines and 300 healthy control samples for 19 coding and promoter region SNPs spanning 45 kb in the central MHC near the TNF genes. The workshop cell lines defined 11 SNP haplotypes that account for approximately 80% of the haplotypes observed in the 300 control individuals. Using the control individuals, we defined a further six haplotypes that account for an additional 10% of donors. We show that the 17 haplotypes of the "TNF block" can be identified using 15 SNPs. CI - Copyright 2004 Wiley-Liss, Inc. FAU - Allcock, Richard J N AU - Allcock RJ AD - School of Surgery and Pathology, University of Western Australia, QEII Medical Centre, Nedlands, Australia. rallcock@cyllene.uwa.edu.au FAU - Windsor, Lydia AU - Windsor L FAU - Gut, Ivo G AU - Gut IG FAU - Kucharzak, Ramon AU - Kucharzak R FAU - Sobre, Laetitia AU - Sobre L FAU - Lechner, Doris AU - Lechner D FAU - Garnier, Jean-Guillaume AU - Garnier JG FAU - Baltic, Svetlana AU - Baltic S FAU - Christiansen, Frank T AU - Christiansen FT FAU - Price, Patricia AU - Price P LA - eng SI - OMIM/191160 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Hum Mutat JT - Human mutation JID - 9215429 RN - 0 (Tumor Necrosis Factors) RN - EC 3.6.1.- (DDX39B protein, human) RN - EC 3.6.4.13 (DEAD-box RNA Helicases) RN - EC 3.6.4.13 (RNA Helicases) SB - IM MH - Cell Line, Transformed MH - DEAD-box RNA Helicases MH - Genotype MH - Haplotypes MH - Humans MH - *Major Histocompatibility Complex MH - *Polymorphism, Single Nucleotide MH - Promoter Regions, Genetic MH - RNA Helicases/genetics MH - Tumor Necrosis Factors/*genetics MH - White People/*genetics EDAT- 2004/11/04 09:00 MHDA- 2005/10/26 09:00 CRDT- 2004/11/04 09:00 PHST- 2004/11/04 09:00 [pubmed] PHST- 2005/10/26 09:00 [medline] PHST- 2004/11/04 09:00 [entrez] AID - 10.1002/humu.20100 [doi] PST - ppublish SO - Hum Mutat. 2004 Dec;24(6):517-25. doi: 10.1002/humu.20100.