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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
1998-9-1
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pubmed:abstractText |
There is a well-known association between rheumatoid arthritis (RA) and HLA-DR4. Recent research has indicated that both DR4 haplotypes are important in disease predisposition (favoring a recessive mode of inheritance). Others have suggested that certain combinations of genotypes, in particular Dw4/Dw14 heterozygotes, may be more important than others. We examined the mode of inheritance of RA using data from the Arthritis and Rheumatism Council's national repository of family material [Worthington et al. (1994) Br J Rheumatol 33:970-976]. There were 85 affected sibships consisting of 77 sib pairs, 6 trios, 1 quintuplet, and 1 sextuplet. The affected sibs shared two, one, and zero parental HLA haplotypes in a ratio of 0.42:0.43:0.15, which was significantly different from random expectations (P = 0.00009). Risk estimates for RA to sibs were calculated based on an overall sibling recurrence risk of 3.9%. Risks for those sharing two, one, and zero parental HLA haplotypes were 6.5% [95% confidence interval (CI) = 5.1-7.9%], 3.3% (95% CI = 2.6-4.0%), and 2.5% (95% CI = 1.5-3.5%), respectively. We also examined the risk of RA based on the DRbeta1 genotype status of sib and proband. After excluding genotypic combinations with small numbers, the highest genotype-specific risks were seen for sibs sharing two haplotypes with either a DRbeta1*0401/DRbeta1*0404 (12.5%, 95% CI = 6.9-15.2%) or a DRbeta1*0401/DRbeta1*0408 (11.1%, 95% CI = 4.5-15.1%) proband. An independent assessment based on the AGFAP methodology confirmed the increase in risk for these genotypes, in particular for DRbeta1*0401/DRbeta1*0408. The excess being due to *0401/*0408 rather than to *0401/*0404 may explain why the Dw4/Dw14 effect is not always observed.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:issn |
0741-0395
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
15
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
403-18
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:9671989-Alleles,
pubmed-meshheading:9671989-Arthritis, Rheumatoid,
pubmed-meshheading:9671989-Epitopes,
pubmed-meshheading:9671989-Female,
pubmed-meshheading:9671989-Gene Frequency,
pubmed-meshheading:9671989-Genotype,
pubmed-meshheading:9671989-HLA-DR Antigens,
pubmed-meshheading:9671989-Haplotypes,
pubmed-meshheading:9671989-Humans,
pubmed-meshheading:9671989-Male,
pubmed-meshheading:9671989-Models, Genetic,
pubmed-meshheading:9671989-Risk Assessment
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pubmed:year |
1998
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pubmed:articleTitle |
HLA haplotype sharing in rheumatoid arthritis sibships: risk estimates subdivided by proband genotype.
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pubmed:affiliation |
Department of Paediatrics, Sheffield Children's Hospital, University of Sheffield, United Kingdom. a.s.rigby@sheffield.ac.uk
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
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