OBJECTIVE: To evaluate whether the systemic sclerosis (SSc)-associated IRAK1 non-synonymous single-nucleotide polymorphism rs1059702 is responsible for the Xq28 association with SSc or whether there are other independent signals in the nearby methyl-CpG-binding protein 2 gene (MECP2). METHODS: We analysed a total of 3065 women with SSc and 2630 unaffected controls from five independent Caucasian cohorts. Four tag single-nucleotide polymorphisms of MECP2 (rs3027935, rs17435, rs5987201 and rs5945175) and the IRAK1 variant rs1059702 were genotyped using TaqMan predesigned assays. A meta-analysis including all cohorts was performed to test the overall effect of these Xq28 polymorphisms on SSc. RESULTS: IRAK1 rs1059702 and MECP2 rs17435 were associated specifically with diffuse cutaneous SSc (PFDR=4.12×10(-3), OR=1.27, 95% CI 1.09 to 1.47, and PFDR=5.26×10(-4), OR=1.30, 95% CI 1.14 to 1.48, respectively), but conditional logistic regression analysis showed that the association of IRAK1 rs1059702 with this subtype was explained by that of MECP2 rs17435. On the other hand, IRAK1 rs1059702 was consistently associated with presence of pulmonary fibrosis (PF), because statistical significance was observed when comparing SSc patients PF+ versus controls (PFDR=0.039, OR=1.30, 95% CI 1.07 to 1.58) and SSc patients PF+ versus SSc patients PF- (p=0.025, OR=1.26, 95% CI 1.03 to 1.55). CONCLUSIONS: Our data clearly suggest the existence of two independent signals within the Xq28 region, one located in IRAK1 related to PF and another in MECP2 related to diffuse cutaneous SSc, indicating that both genes may have an impact on the clinical outcome of the disease.
OBJECTIVE: To evaluate whether the systemic sclerosis (SSc)-associated IRAK1 non-synonymous single-nucleotide polymorphism rs1059702 is responsible for the Xq28 association with SSc or whether there are other independent signals in the nearby methyl-CpG-binding protein 2 gene (MECP2). METHODS: We analysed a total of 3065 women with SSc and 2630 unaffected controls from five independent Caucasian cohorts. Four tag single-nucleotide polymorphisms of MECP2 (rs3027935, rs17435, rs5987201 and rs5945175) and the IRAK1 variant rs1059702 were genotyped using TaqMan predesigned assays. A meta-analysis including all cohorts was performed to test the overall effect of these Xq28 polymorphisms on SSc. RESULTS:IRAK1rs1059702 and MECP2rs17435 were associated specifically with diffuse cutaneous SSc (PFDR=4.12×10(-3), OR=1.27, 95% CI 1.09 to 1.47, and PFDR=5.26×10(-4), OR=1.30, 95% CI 1.14 to 1.48, respectively), but conditional logistic regression analysis showed that the association of IRAK1rs1059702 with this subtype was explained by that of MECP2rs17435. On the other hand, IRAK1rs1059702 was consistently associated with presence of pulmonary fibrosis (PF), because statistical significance was observed when comparing SSc patients PF+ versus controls (PFDR=0.039, OR=1.30, 95% CI 1.07 to 1.58) and SSc patients PF+ versus SSc patients PF- (p=0.025, OR=1.26, 95% CI 1.03 to 1.55). CONCLUSIONS: Our data clearly suggest the existence of two independent signals within the Xq28 region, one located in IRAK1 related to PF and another in MECP2 related to diffuse cutaneous SSc, indicating that both genes may have an impact on the clinical outcome of the disease.
Authors: Shaun Purcell; Benjamin Neale; Kathe Todd-Brown; Lori Thomas; Manuel A R Ferreira; David Bender; Julian Maller; Pamela Sklar; Paul I W de Bakker; Mark J Daly; Pak C Sham Journal: Am J Hum Genet Date: 2007-07-25 Impact factor: 11.025
Authors: John B Harley; Marta E Alarcón-Riquelme; Lindsey A Criswell; Chaim O Jacob; Robert P Kimberly; Kathy L Moser; Betty P Tsao; Timothy J Vyse; Carl D Langefeld; Swapan K Nath; Joel M Guthridge; Beth L Cobb; Daniel B Mirel; Miranda C Marion; Adrienne H Williams; Jasmin Divers; Wei Wang; Summer G Frank; Bahram Namjou; Stacey B Gabriel; Annette T Lee; Peter K Gregersen; Timothy W Behrens; Kimberly E Taylor; Michelle Fernando; Raphael Zidovetzki; Patrick M Gaffney; Jeffrey C Edberg; John D Rioux; Joshua O Ojwang; Judith A James; Joan T Merrill; Gary S Gilkeson; Michael F Seldin; Hong Yin; Emily C Baechler; Quan-Zhen Li; Edward K Wakeland; Gail R Bruner; Kenneth M Kaufman; Jennifer A Kelly Journal: Nat Genet Date: 2008-01-20 Impact factor: 38.330
Authors: B D Korman; M I Alba; J M Le; I Alevizos; J A Smith; N P Nikolov; D L Kastner; E F Remmers; G G Illei Journal: Genes Immun Date: 2008-02-14 Impact factor: 2.676
Authors: A H Sawalha; M Jeffries; R Webb; Q Lu; G Gorelik; D Ray; J Osban; N Knowlton; K Johnson; B Richardson Journal: Genes Immun Date: 2008-06 Impact factor: 2.676
Authors: Maria Chahrour; Sung Yun Jung; Chad Shaw; Xiaobo Zhou; Stephen T C Wong; Jun Qin; Huda Y Zoghbi Journal: Science Date: 2008-05-30 Impact factor: 47.728
Authors: Amr H Sawalha; Ryan Webb; Shizhong Han; Jennifer A Kelly; Kenneth M Kaufman; Robert P Kimberly; Marta E Alarcón-Riquelme; Judith A James; Timothy J Vyse; Gary S Gilkeson; Chan-Bum Choi; R Hal Scofield; Sang-Cheol Bae; Swapan K Nath; John B Harley Journal: PLoS One Date: 2008-03-05 Impact factor: 3.240
Authors: Debendra Pattanaik; Monica Brown; Bradley C Postlethwaite; Arnold E Postlethwaite Journal: Front Immunol Date: 2015-06-08 Impact factor: 7.561