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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2018 ; 13
(6
): e0199003
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Genetic contributions to lupus nephritis in a multi-ethnic cohort of systemic
lupus erythematous patients
#MMPMID29953444
Lanata CM
; Nititham J
; Taylor KE
; Chung SA
; Torgerson DG
; Seldin MF
; Pons-Estel BA
; Tusié-Luna T
; Tsao BP
; Morand EF
; Alarcón-Riquelme ME
; Criswell LA
PLoS One
2018[]; 13
(6
): e0199003
PMID29953444
show ga
OBJECTIVE: African Americans, East Asians, and Hispanics with systemic lupus
erythematous (SLE) are more likely to develop lupus nephritis (LN) than are SLE
patients of European descent. The etiology of this difference is not clear, and
this study was undertaken to investigate how genetic variants might explain this
effect. METHODS: In this cross-sectional study, 1244 SLE patients from
multiethnic case collections were genotyped for 817,810 single-nucleotide
polymorphisms (SNPs) across the genome. Continental genetic ancestry was
estimated utilizing the program ADMIXTURE. Gene-based testing and pathway
analysis was performed within each ethnic group and meta-analyzed across
ethnicities. We also performed candidate SNP association tests with SNPs
previously established as risk alleles for SLE, LN, and chronic kidney disease
(CKD). Association testing and logistic regression models were performed with LN
as the outcome, adjusted for continental ancestries, sex, disease duration, and
age. RESULTS: We studied 255 North European, 263 South European, 238 Hispanic,
224 African American and 264 East Asian SLE patients, of whom 606 had LN (48.7%).
In genome-wide gene-based and candidate SNP analyses, we found distinct genes,
pathways and established risk SNPs associated with LN for each ethnic group.
Gene-based analyses showed significant associations between variation in ZNF546
(p = 1.0E-06), TRIM15 (p = 1.0E-06), and TRIMI0 (p = 1.0E-06) and LN among South
Europeans, and TTC34 (p = 8.0E-06) was significantly associated with LN among
Hispanics. The SNP rs8091180 in NFATC1 was associated with LN (OR 1.43, p =
3.3E-04) in the candidate SNP meta-analysis with the highest OR among
African-Americans (OR 2.17, p = 0.0035). CONCLUSION: Distinct genetic factors are
associated with the risk of LN in SLE patients of different ethnicities. CKD risk
alleles may play a role in the development of LN in addition to SLE-associated
risk variants. These findings may further explain the clinical heterogeneity of
LN risk and response to therapy observed between different ethnic groups.