Cited by 98Systemic Lupus Erythematosus ResearchGenomics and Chromatin DynamicsGenetic Associations and Epidemiology

An Enhancer Element Harboring Variants Associated with Systemic Lupus Erythematosus Engages the TNFAIP3 Promoter to Influence A20 Expression

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Wang, Shaofeng, Wen, Feng, Wiley, Graham B., Kinter, Michael T., Gaffney, Patrick M.·2013·PLoS Genetics

Abstract

Functional characterization of causal variants present on risk haplotypes identified through genome-wide association studies (GWAS) is a primary objective of human genetics. In this report, we evaluate the function of a pair of tandem polymorphic dinucleotides, 42 kb downstream of the promoter of TNFAIP3, (rs148314165, rs200820567, collectively referred to as TT>A) recently nominated as causal variants responsible for genetic association of systemic lupus erythematosus (SLE) with tumor necrosis factor alpha inducible protein 3 (TNFAIP3). TNFAIP3 encodes the ubiquitin-editing enzyme, A20, a key negative regulator of NF-κB signaling. A20 expression is reduced in subjects carrying the TT>A risk alleles; however, the underlying functional mechanism by which this occurs is unclear. We used a combination of electrophoretic mobility shift assays (EMSA), mass spectrometry (MS), reporter assays, chromatin immunoprecipitation-PCR (ChIP-PCR) and chromosome conformation capture (3C) EBV transformed lymphoblastoid cell lines (LCL) from individuals carrying risk and non-risk TNFAIP3 haplotypes to characterize the effect of TT>A on A20 expression. Our results demonstrate that the TT>A variants reside in an enhancer element that binds NF-κB and SATB1 enabling physical interaction of the enhancer with the TNFAIP3 promoter through long-range DNA looping. Impaired binding of NF-κB to the TT>A risk alleles or knockdown of SATB1 expression by shRNA, inhibits the looping interaction resulting in reduced A20 expression. Together, these data reveal a novel mechanism of TNFAIP3 transcriptional regulation and establish the functional basis by which the TT>A risk variants attenuate A20 expression through inefficient delivery of NF-κB to the TNFAIP3 promoter. These results provide critical functional evidence supporting a direct causal role for TT>A in the genetic predisposition to SLE.

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  • A systemic lupus erythematosus-associated variant (TT > A) situated within an enhancer downstream of TNFAIP3 abrogates NF-kB binding, affecting TNFAIP3 expression.

    “In another example, a systemic lupus erythematosus-associated variant (termed TT > A) situated within an enhancer downstream of TNFAIP3 has been shown to abrogate NF-kB binding, affecting TNFAIP3 expression [211, 212].”

    From Transcriptional enhancers and their communication with gene promoters (2021) · cites this paper as [212]

    The Abstract identifies TT>A as an SLE-associated variant in a downstream enhancer and reports reduced A20 expression, the protein encoded by TNFAIP3. The Results section, “The TT>A risk alleles bind NF-κB subunits with reduced affinity” (page unavailable), finds impaired NF-κB binding—not that binding is abrogated. The claim overstates that effect. (LLM, conf=0.90)

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  1. [37]Nair RP, Duffin KC, Helms C, Ding J, Stuart PE, et al (2009) Genome-wide scan reveals association of psoriasis with IL-23 and NF-kappaB pathways. Nat Genet 41: 199– 204. 19169254 PMC2745122

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Authors
Wang, S., Wen, F., Wiley, G. B., Kinter, M. T., & Gaffney, P. M.
Affiliations
Oklahoma Medical Research Foundation (US)
Corresponding author
Gaffney, Patrick M.
Venue
PLoS Genetics
Published
2013-09-05
Volume
9
Issue
9
Pages
e1003750
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2032639657
Cited by
98
References
40
Citations by year
2026: 2 · 2025: 4 · 2024: 5 · 2023: 6 · 2022: 6 · 2021: 7 · 2020: 11 · 2019: 13 · 2018: 9 · 2017: 9 · 2016: 8 · 2015: 9 · 2014: 7 · 2013: 1 · 2012: 1
FWCI
6.82
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Oklahoma Medical Research Foundation
  • National Institutes of Health (5rc2ar058959-02, AR058959, AI063274, GM103456)
  • National Institute of General Medical Sciences (P20GM103456, GM103456)
  • National Institute of Allergy and Infectious Diseases (R01AI063274, AI-063274, R56AI063274)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR-063124, AR056360, R01AR063124, RC2-AR-058959, AR058959, R01AR056360)
Topics
  • Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
systemic lupus erythematosus, A20, enhancers, causal variants, risk haplotype, NF-kappaB binding, SATB1, enhancer-promoter interactions, transcriptional regulation, ubiquitin-editing enzyme, NF-κB signaling
MeSH terms
Tumor Necrosis Factor alpha-Induced Protein 3, Alleles, DNA-Binding Proteins, Enhancer Elements, Genetic, Gene Expression Regulation, Haplotypes, Humans, Lupus Erythematosus, Systemic, Nuclear Proteins, Promoter Regions, Genetic, Signal Transduction, NF-kappa B, Genetic Predisposition to Disease, Polymorphism, Single Nucleotide, Matrix Attachment Region Binding Proteins, Intracellular Signaling Peptides and Proteins, HEK293 Cells

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