A Multinational Arab Genome-Wide Association Study Identifies New Genetic Associations for Rheumatoid Arthritis

被引：20

作者：

Saxena, Richa ^{[1
,2
]}

Plenge, Robert M. ^{[2
,3
,4
]}

Bjonnes, Andrew C. ^{[1
,2
]}

Dashti, Hassan S. ^{[1
,2
]}

Okada, Yukinori ^{[5
,6
]}

El Haq, Wessam Gad ^{[7
]}

Hammoudeh, Mohammed ^{[8
]}

Al Emadi, Samar ^{[8
]}

Masri, Basel K. ^{[9
]}

Halabi, Hussein ^{[10
]}

Badsha, Humeira ^{[11
]}

Uthman, Imad W. ^{[12
]}

Margolin, Lauren ^{[2
]}

Gupta, Namrata ^{[2
]}

Mahfoud, Ziyad R. ^{[7
]}

Kapiri, Marianthi ^{[7
]}

Dargham, Soha R. ^{[7
]}

Aranki, Grace ^{[7
]}

Kazkaz, Layla A. ^{[13
]}

Arayssi, Thurayya ^{[7
]}

机构：

[1] Harvard Med Sch, Massachusetts Gen Hosp, Boston, MA USA

[2] Broad Inst, Cambridge, MA USA

[3] Merck Res Labs, Boston, MA USA

[4] Harvard Med Sch, Brigham & Womens Hosp, Boston, MA USA

[5] Tokyo Med & Dent Univ, Grad Sch Med & Dent Sci, Tokyo, Japan

[6] RIKEN, Yokohama, Kanagawa, Japan

[7] Weill Cornell Med Qatar, POB 24144, Doha, Qatar

[8] Hamad Med Corp, Doha, Qatar

[9] Jordan Hosp, Amman, Jordan

[10] King Faisal Specialist Hosp & Res Ctr, Jeddah, Saudi Arabia

[11] Dr Humeira Badsha Med Ctr, Dubai, U Arab Emirates

[12] Amer Univ Beirut, Beirut, Lebanon

[13] Tishreen Hosp, Damascus, Syria

来源：

ARTHRITIS & RHEUMATOLOGY | 2017年 / 69卷 / 05期

关键词：

SHARED EPITOPE; HLA; EXPRESSION; POPULATIONS; VARIANTS; RISK; POLYMORPHISM; METAANALYSIS; MECHANISMS; HAPLOTYPES;

D O I：

10.1002/art.40051

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Objective. Genetic factors underlying susceptibility to rheumatoid arthritis (RA) in Arab populations are largely unknown. This genome-wide association study (GWAS) was undertaken to explore the generalizability of previously reported RA loci to Arab subjects and to discover new Arab-specific genetic loci. Methods. The Genetics of Rheumatoid Arthritis in Some Arab States Study was designed to examine the genetics and clinical features of RA patients from Jordan, the Kingdom of Saudi Arabia, Lebanon, Qatar, and the United Arab Emirates. In total, >7 million single-nucleotide polymorphisms (SNPs) were tested for association with RA overall and with seropositive or seronegative RA in 511 RA cases and 352 healthy controls. In addition, replication of 15 signals was attempted in 283 RA cases and 221 healthy controls. A genetic risk score of 68 known RA SNPs was also examined in this study population. Results. Three loci (HLA region, intergenic 5q13, and 17p13 at SMTNL2/GGT6) reached genome-wide significance in the analyses of association with RA and with seropositive RA, and for all 3 loci, evidence of independent replication was demonstrated. Consistent with the findings in European and East Asian populations, the association of RA with HLA-DRB1 amino acid position 11 conferred the strongest effect (P = 4.8 x 10(-16)), and a weighted genetic risk score of previously associated RA loci was found to be associated with RA (P=3.41 x 10(-5)) and with seropositive RA (P=1.48 x 10(-6)) in this population. In addition, 2 novel associations specific to Arab populations were found at the 5q13 and 17p13 loci. Conclusion. This first RA GWAS in Arab populations confirms that established HLA-region and known RA risk alleles contribute strongly to the risk and severity of disease in some Arab groups, suggesting that the genetic architecture of RA is similar across ethnic groups. Moreover, this study identified 2 novel RA risk loci in Arabs, offering further population-specific insights into the pathophysiology of RA.

引用

页码：976 / 985

页数：10

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