PMID- 18684745 OWN - NLM STAT- MEDLINE DCOM- 20090126 LR - 20211020 IS - 1468-2060 (Electronic) IS - 0003-4967 (Print) IS - 0003-4967 (Linking) VI - 68 IP - 1 DP - 2009 Jan TI - Non-inherited maternal human leukocyte antigen alleles in susceptibility to familial rheumatoid arthritis. PG - 107-9 LID - 10.1136/ard.2008.092312 [doi] AB - OBJECTIVES: Some patients with rheumatoid arthritis (RA) lack RA-associated human leukocyte antigen (HLA) alleles. Prior studies investigated non-inherited maternal HLA alleles (NIMA) in RA risk with conflicting results. METHODS: We examined NIMA in a large cohort of families from the North American Rheumatoid Arthritis Consortium (NARAC). RESULTS: Among 620 patients with 1 or both parents having a HLA genotype, patients with RA informative for analysis included 176 without HLA-DRB1*04 and 86 without the HLA shared epitope (SE). The frequency of NIMA encoding HLA-DR4 or the SE was compared to the non-inherited paternal allele (NIPA). DR4-encoding NIMA vs NIPA revealed no significant difference (27% vs 20%). However, parity is known to modulate RA risk and analyses stratified by sex and age of onset showed significant variation among women. Interestingly, among women with onset <45 years DR4-encoding NIMA was increased compared to NIPA; among women > or =45 years at onset the reverse was observed (31% vs 16% compared to 10% vs 60%, p = 0.008). DR4 encoding NIMA vs NIPA did not differ in men. The SE did not differ in men or women. CONCLUSIONS: Risk of RA was associated with HLA-DR4 encoding NIMA in younger-onset women but not in older-onset women or men. These observations could help explain conflicting prior results of NIMA in RA. FAU - Guthrie, K A AU - Guthrie KA AD - Clinical Statistics D5-360, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA. kguthrie@fhcrc.org FAU - Tishkevich, N R AU - Tishkevich NR FAU - Nelson, J L AU - Nelson JL LA - eng GR - N01AR22263/AR/NIAMS NIH HHS/United States GR - R01 AI045659/AI/NIAID NIH HHS/United States GR - R01 AI041721/AI/NIAID NIH HHS/United States GR - AI41721/AI/NIAID NIH HHS/United States GR - AI45659/AI/NIAID NIH HHS/United States GR - N01 AR22263/AR/NIAMS NIH HHS/United States GR - R01 AI045659-10/AI/NIAID NIH HHS/United States GR - R01 AI041721-12/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20080806 PL - England TA - Ann Rheum Dis JT - Annals of the rheumatic diseases JID - 0372355 RN - 0 (HLA-DR Antigens) RN - 0 (HLA-DRB1 Chains) RN - 0 (HLA-DRB1*04 antigen) SB - IM MH - Adolescent MH - Adult MH - Age of Onset MH - Aged MH - Alleles MH - Arthritis, Rheumatoid/*genetics/*immunology MH - Child MH - Child, Preschool MH - Epitope Mapping/methods MH - Female MH - Genetic Predisposition to Disease MH - Genotype MH - HLA-DR Antigens/*genetics MH - HLA-DRB1 Chains MH - Humans MH - Logistic Models MH - Male MH - Middle Aged MH - *Mothers MH - Risk MH - Sex Factors PMC - PMC2760537 MID - NIHMS135329 EDAT- 2008/08/08 09:00 MHDA- 2009/01/27 09:00 PMCR- 2009/10/12 CRDT- 2008/08/08 09:00 PHST- 2008/08/08 09:00 [entrez] PHST- 2008/08/08 09:00 [pubmed] PHST- 2009/01/27 09:00 [medline] PHST- 2009/10/12 00:00 [pmc-release] AID - ard.2008.092312 [pii] AID - 10.1136/ard.2008.092312 [doi] PST - ppublish SO - Ann Rheum Dis. 2009 Jan;68(1):107-9. doi: 10.1136/ard.2008.092312. Epub 2008 Aug 6.