Volume 46, Issue 1 pp. 42-51
Original Article

Cyclosporine differentially regulates interleukin-10, interleukin-15, and tumor necrosis factor α production by rheumatoid synoviocytes

Mi-La Cho

Mi-La Cho

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Wan-Uk Kim

Wan-Uk Kim

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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So-Youn Min

So-Youn Min

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Do-June Min

Do-June Min

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Jun-Ki Min

Jun-Ki Min

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Sang-Heon Lee

Sang-Heon Lee

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Sung-Hwan Park

Sung-Hwan Park

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Chul-Soo Cho

Chul-Soo Cho

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

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Ho-Youn Kim

Corresponding Author

Ho-Youn Kim

The Center for Rheumatic Diseases in Kang-Nam St. Mary' Hospital, and Research Institute of Immunobiology, Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul, South Korea

The Center for Rheumatic Diseases in Kang-Nam St. Mary's Hospital, Division of Rheumatology, Department of Internal Medicine, Catholic University of Korea School of Medicine, No. 505 Banpo-Dong, Seocho-Ku, Seoul 137-040, South KoreaSearch for more papers by this author

Abstract

Objective

To determine the direct effect of cyclosporin A (CSA) on the production of cytokines by rheumatoid synovial fibroblasts.

Methods

Fibroblast-like synoviocytes (FLS) were prepared from the synovial tissues of patients with rheumatoid arthritis and cultured in the presence of CSA. The production of interleukin-10 (IL-10), IL-15, and tumor necrosis factor α (TNFα) by FLS was measured in culture supernatants by enzyme-linked immunosorbent assay. The expression of IL-10, IL-15, and TNFα messenger RNA (mRNA) in FLS was determined by polymerase chain reaction (PCR).

Results

CSA (1–1,000 ng/ml) increased the production of IL-10, but decreased in a dose-dependent manner the levels of IL-15 and TNFα that were spontaneously secreted from FLS. CSA also potently inhibited the production of IL-15 and TNFα stimulated with interferon-γ, IL-1β, or lipopolysaccharide. The inhibitory effect of CSA on IL-15 and TNFα production depended on the increase in IL-10, since neutralizing anti-IL-10 antibodies were able to partially reverse this inhibition. In a semiquantitative PCR, CSA increased IL-10 mRNA expression but strongly suppressed IL-1β-induced IL-15 and TNFα mRNA expression, indicating that the production of these cytokines by CSA was regulated at the transcriptional level. Results with the calcineurin inhibitor FK-506, but not with the immunosuppressant rapamycin, were similar to those with CSA. Agonists of cAMP displayed an additive effect on the changes produced in the IL-10, IL-15, and TNFα levels by CSA, while a cAMP antagonist almost completely abrogated the effect of CSA, suggesting that cAMP is the major intracellular signal that mediates cytokine regulation by CSA.

Conclusion

These results suggest that CSA differentially regulates the production of cytokines by rheumatoid synoviocytes via a cAMP-dependent pathway.

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