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  • Title: Increased CD4+CD25-Foxp3+ T cells in Chinese systemic lupus erythematosus: correlate with disease activity and organ involvement.
    Author: Yin ZJ, Ju BM, Zhu L, Hu N, Luo J, He M, Feng XY, Lv XH, Pu D, He L.
    Journal: Lupus; 2018 Nov; 27(13):2057-2068. PubMed ID: 30336752.
    Abstract:
    OBJECTIVE: The increment of CD4+CD25-Foxp3+T cells has been reported in systemic lupus erythematosus (SLE) patients. However, the exact identity of this T cell subset is still unclear. Thus, we analyzed CD4+CD25-Foxp3+T cells and Treg cells (CD4+CD25+Foxp3+ T cells) in a large sample of Chinese SLE patients in different disease states. METHODS: A total of 280 SLE patients and 38 healthy volunteers were enrolled, which included 21 patients with untreated new-onset lupus (UNOL), 13 patients with drug withdrawal more than 6 months and 246 patients with treatments. Phenotypic and functional analysis of peripheral blood CD4+CD25-Foxp3+ T cells and Treg cells were performed by flow cytometry. The correlation of CD4+CD25-Foxp3+T cells and Treg cells with disease activity, clinical indicators and organ involvement were analyzed. RESULTS: CD4+CD25-Foxp3+ T cells and Treg cells were significantly increased in SLE patients and showed significantly positive correlations with disease activity. CD4+CD25-Foxp3+ T cells were significantly increased in patients with skin and hematologic involvement as well as arthritis. Diverse changes between CD4+CD25-Foxp3+ T cells and Treg cells when faced with different medications, especially HCQ and MMF. CD4+CD25-Foxp3+ T cells expressed more IFN-γ and less CTLA-4 than CD4+CD25+Foxp3+ T cells, which were similar to CD4+CD25+Foxp3- T cells, and expressed similar IL-17, ICOS and Helios to CD4+CD25+Foxp3+ T cells. The synthesis capacity of IL-10 of CD4+CD25-Foxp3+ T cells and the expression of GITR on CD4+CD25-Foxp3+ T cells were between CD4+CD25+Foxp3+ and CD4+CD25+Foxp3- T cells. CONCLUSIONS: Our results indicate that increased CD4+CD25-Foxp3+ T cells in lupus patients, which combined the features of suppression and pro-inflammatory, may serve as a biomarker for disease activity and organ involvement in SLE.
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