Transancestral mapping and genetic load in systemic lupus erythematosus.

Langefeld CD, Ainsworth HC, Cunninghame Graham DS, Kelly JA, Comeau ME, Marion MC, Howard TD, Ramos PS, Croker JA, Morris DL, Sandling JK, Almlöf JC, Acevedo-Vásquez EM, Alarcón GS, Babini AM, Baca V, Bengtsson AA, Berbotto GA, Bijl M, Brown EE, Brunner HI, Cardiel MH, Catoggio L, Cervera R, Cucho-Venegas JM, Dahlqvist SR, D'Alfonso S, Da Silva BM, de la Rúa Figueroa I, Doria A, Edberg JC, Endreffy E, Esquivel-Valerio JA, Fortin PR, Freedman BI, Frostegård J, García MA, de la Torre IG, Gilkeson GS, Gladman DD, Gunnarsson I, Guthridge JM, Huggins JL, James JA, Kallenberg CGM, Kamen DL, Karp DR, Kaufman KM, Kottyan LC, Kovács L, Laustrup H, Lauwerys BR, Li QZ, Maradiaga-Ceceña MA, Martín J, McCune JM, McWilliams DR, Merrill JT, Miranda P, Moctezuma JF, Nath SK, Niewold TB, Orozco L, Ortego-Centeno N, Petri M, Pineau CA, Pons-Estel BA, Pope J, Raj P, Ramsey-Goldman R, Reveille JD, Russell LP, Sabio JM, Aguilar-Salinas CA, Scherbarth HR, Scorza R, Seldin MF, Sjöwall C, Svenungsson E, Thompson SD, Toloza SMA, Truedsson L, Tusié-Luna T, Vasconcelos C, Vilá LM, Wallace DJ, Weisman MH, Wither JE, Bhangale T, Oksenberg JR, Rioux JD, Gregersen PK, Syvänen AC, Rönnblom L, Criswell LA, Jacob CO, Sivils KL, Tsao BP, Schanberg LE, Behrens TW, Silverman ED, Alarcón-Riquelme ME, Kimberly RP, Harley JB, Wakeland EK, Graham RR, Gaffney PM, Vyse TJ

Nat Commun 8 (-) 16021 [2017-07-17; online 2017-07-17]

Systemic lupus erythematosus (SLE) is an autoimmune disease with marked gender and ethnic disparities. We report a large transancestral association study of SLE using Immunochip genotype data from 27,574 individuals of European (EA), African (AA) and Hispanic Amerindian (HA) ancestry. We identify 58 distinct non-HLA regions in EA, 9 in AA and 16 in HA (∼50% of these regions have multiple independent associations); these include 24 novel SLE regions (P<5 × 10(-8)), refined association signals in established regions, extended associations to additional ancestries, and a disentangled complex HLA multigenic effect. The risk allele count (genetic load) exhibits an accelerating pattern of SLE risk, leading us to posit a cumulative hit hypothesis for autoimmune disease. Comparing results across the three ancestries identifies both ancestry-dependent and ancestry-independent contributions to SLE risk. Our results are consistent with the unique and complex histories of the populations sampled, and collectively help clarify the genetic architecture and ethnic disparities in SLE.

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PubMed 28714469

DOI 10.1038/ncomms16021

Crossref 10.1038/ncomms16021

ncomms16021

pmc PMC5520018