Increased interleukin‑9 and CD4+IL-9+ T cells in patients with systemic lupus erythematosus

Ouyang,Han; Shi,Yongbing; Liu,Zhichun; Feng,Sheng; Li,Lingyun; Su,Nan; Lu,Ying; Kong,Shumin

doi:10.3892/mmr.2013.1258

March 2013 Volume 7 Issue 3

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March 2013 Volume 7 Issue 3

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Article

Increased interleukin‑9 and CD4+IL-9+ T cells in patients with systemic lupus erythematosus

Authors:
- Han Ouyang
- Yongbing Shi
- Zhichun Liu
- Sheng Feng
- Lingyun Li
- Nan Su
- Ying Lu
- Shumin Kong
View Affiliations / Copyright

Affiliations: Department of Nephrology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China, Department of Rheumatology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China, Department of Pharmacology, Medical College of Soochow University, Suzhou, Jiangsy 215004, P.R. China, Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu 215004, P.R. China
Pages: 1031-1037
|
Published online on: January 2, 2013

https://doi.org/10.3892/mmr.2013.1258
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Abstract

Systemic lupus erythematosus (SLE) is an autoimmune disease of unknown origin affecting all the organ systems. Apart from genetic and environmental factors, autoantibody and immune complex deposition as well as cytokine imbalances contribute to immune dysfunction. Interleukin‑9 (IL-9) is a T cell-derived factor preferentially expressed by CD4+ T cells and it has been characterized in human and murine systems. IL-9 targets cells of the lymphoid, myeloid and mast cell lineages, and is likely to contribute to the development of allergic and autoimmune diseases such as asthma, arthritis, multiple sclerosis and experimental autoimmune encephalomyelitis (EAE). Nevertheless, until recently there have been no studies on its role in SLE in humans. In the present study, the mRNA and serum IL-9 levels in the peripheral blood of SLE patients and healthy controls were assessed using real-time PCR and enzyme-linked immunosorbent assay (ELISA), respectively. Flow cytometry was used to analyze the percentages of CD4+IL-9+ T cells in SLE patients. Moreover, differences between the groups and the effect of glucocorticoids were analyzed. The results showed that the plasma concentration and mRNA levels of IL-9 were significantly elevated in SLE patients compared with the healthy controls. The percentages of CD4+IL-9+ T cells were also increased in SLE patients. In addition, serum IL-9 levels and the percentages of CD4+IL-9+ T cells were correlated with the SLE disease activity index (SLEDAI). Additionally, the percentages of CD4+IL-9+ T cells and serum IL-9 levels in 8 untreated active SLE patients were decreased at 1, 2 and 3 weeks after treatment with methylprednisolone. In conclusion, we provide evidence that IL-9 is increased in SLE patients. Moreover, it is described for the ﬁrst time that high expression of IL-9 levels and the percentages of CD4+IL-9+ T cells correlate with disease activity and severity. This suggests an important role of IL-9 in the pathogenesis of SLE.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

Increased interleukin‑9 and CD4+IL-9+ T cells in patients with systemic lupus erythematosus

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