Abstract
Purpose
A20 gene functions in negative immunoregulation and its SNP is related to SLE disease. But its expression level in immune cells from SLE patients is still unclear. The aim of this study is to investigate whether the expression of A20 is associated with pathogenesis of SLE.
Methods
Real-time transcription-polymerase chain reaction analysis (RT-PCR) was used to determine expression of A20 mRNA in peripheral blood mononuclear cells (PBMC) from 37 patients with SLE and 32 healthy controls.
Results
A20 expression was decreased in SLE patients compared with healthy controls (p = 0.0133). The expression level of A20 gene negatively correlated with the SLE disease activity index (SLEDAI) (r =−0.4661, p = 0.0036) and erythrocyte sedimentation rate (ESR) (r =−0.5222, p = 0.0009). Furthermore, SLE patients with nephritis had a lower expression of A20 than those without nephritis (p = 0.0188).
Conclusions
Our results suggest that the insufficient expression of A20 gene in PBMC may take part in the pathogenesis of SLE disease.
Similar content being viewed by others
References
Apostolidis SA, Lieberman LA, Kis-Toth K, et al. The dysregulation of cytokine networks in systemic lupus erythematosus. J Interferon Cytokine Res. 2011;31:769–79.
Hrycek A, Kusmierz D, Dybała T, et al. Expression of messenger RNA for transforming growth factor-beta1 and for transforming growth factor-beta receptors in peripheral blood of systemic lupus erythematosus patients treated with low doses of quinagolide. Autoimmunity. 2007;40:23–30.
Wong CK, Lit LC, Tam LS, et al. Aberrant production of soluble costimulatory molecules CTLA-4, CD28, CD80 and CD86 in patients with systemic lupus erythematosus. Rheumatology (Oxford). 2005;44:989–94.
Fujimoto M, Tsutsui H, Xinshou O, et al. Inadequate induction of suppressor of cytokine signaling-1 causes systemic autoimmune diseases. Int Immunol. 2004;16:303–14.
Zhang B, Zhang X, Tang F, et al. Reduction of forkhead box P3 levels in CD4 + CD25high T cells in patients with new-onset systemic lupus erythematosus. Clin Exp Immunol. 2008;153:182–7.
Vereecke L, Beyaert R, van Loo G. The ubiquitin-editing enzyme A20 (TNFAIP3) is a central regulator of immunopathology. Trends Immunol. 2009;30:383–91.
Coornaert B, Carpentier I, Beyaert R. A20: central gatekeeper in inflammation and immunity. J Biol Chem. 2009;284:8217–21.
Kingeter LM, Paul S, Maynard SK, et al. Cutting edge: TCR ligation triggers digital activation of NF-kappaB. J Immunol. 2010;185:4520–4.
Düwel M, Welteke V, Oeckinghaus A, et al. A20 negatively regulates T cell receptor signaling to NF-kappaB by cleaving Malt1 ubiquitin chains. J Immunol. 2009;182:7718–28.
Verstrepen L, Verhelst K, van Loo G, et al. Expression, biological activities and mechanisms of action of A20 (TNFAIP3). Biochem Pharmacol. 2010;80:2009–20.
Vereecke L, Beyaert R, van Loo G. Genetic relationships between A20/TNFAIP3, chronic inflammation and autoimmune disease. Biochem Soc Trans. 2011;39:1086–91.
Hövelmeyer N, Reissig S, Xuan NT, et al. A20 deficiency in B cells enhances B-cell proliferation and results in the development of autoantibodies. Eur J Immunol. 2011;41:595–601.
Ohl K, Tenbrock K. Inflammatory cytokines in systemic lupus erythematosus. J Biomed Biotechnol. 2011;2011:432595.
Matmati M, Jacques P, Maelfait J, et al. A20 (TNFAIP3) deficiency in myeloid cells triggers erosive polyarthritis resembling rheumatoid arthritis. Nat Genet. 2011;43:908–12.
Bombardier C, Gladman DD, Hurwitz MB, et al. Derivation of the SLEDAI: a disease activity index for lupus patients. The committee on prognosis studies in SLE. Arthritis Rheum. 1992;35:630–40.
Hawker G, Gabriel S, Bombardier C, et al. A reliability study of SLEDAI: a disease activity index for systemic lupus erythematosus. J Rheumatol. 1993;20:657–60.
Boonyasrisawat W, Eberle D, Bacci S, et al. Tag polymorphisms at the A20 (TNFAIP3) locus are associated with lower gene expression and increased risk of coronary artery disease in type 2 diabetes. Diabetes. 2007;56:499–505.
Adrianto I, Wen F, Templeton A, et al. Association of a functional variant downstream of TNFAIP3 with systemic lupus erythematosus. Nat Genet. 2011;43:253–8.
Frenzel LP, Claus R, Plume N, et al. Sustained NF-kappaB activity in chronic lymphocytic leukemia is independent of genetic and epigenetic alterations in the TNFAIP3 (A20) locus. Int J Cancer. 2011;128:2495–500.
Chanudet E, Huang Y, Ichimura K, et al. A20 is targeted by promoter methylation, deletion and inactivating mutation in MALT lymphoma. Leukemia. 2010;24:483–7.
Graham RR, Cotsapas C, Davies L, et al. Genetic variants near TNFAIP3 on 6q23 are associated with systemic lupus erythematosus. Nat Genet. 2008;40:1059–61.
Musone SL, Taylor KE, Lu TT, et al. Multiple polymorphisms in the TNFAIP3 region are independently associated with systemic lupus erythematosus. Nat Genet. 2008;40:1062–4.
Tavares RM, Turer EE, Liu CL, et al. The ubiquitin modifying enzyme A20 restricts B cell survival and prevents autoimmunity. Immunity. 2010;33:181–91.
Kool M, van Loo G, Waelput W, et al. The ubiquitin-editing protein A20 prevents dendritic cell activation, recognition of apoptotic cells, and systemic autoimmunity. Immunity. 2011;35:82–96.
Acknowledgments
This work was supported by grants from the National Nature Science Foundation of China (No. 81071705 and No. 30500591), the Award Funds for Excellent Young and Middle-aged Scientists of Shandong Province (BS2009YY002) and the National “973” Program of China (No. 2011CB503906).
Conflict of Interest
The authors declare that they have no conflict of interest.
Author information
Authors and Affiliations
Corresponding author
Additional information
Di Li and Lei Wang contributed equally to this work.
Rights and permissions
About this article
Cite this article
Li, D., Wang, L., Fan, Y. et al. Down-Regulation of A20 mRNA Expression in Peripheral Blood Mononuclear Cells from Patients with Systemic Lupus Erythematosus. J Clin Immunol 32, 1287–1291 (2012). https://doi.org/10.1007/s10875-012-9764-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10875-012-9764-2