Volume 8, Issue 1 pp. 1-9
Original Contribution

Suppressive effects of cyclosporine A on neutrophils and T cells may be related to therapeutic benefits in patients with steroid-resistant ulcerative colitis

Kenji Ina

Kenji Ina

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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Dr. Kazuo Kusugami

Corresponding Author

Dr. Kazuo Kusugami

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

First Department of Internal Medicine, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466–8550, JapanSearch for more papers by this author
Masaaki Shimada

Masaaki Shimada

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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Tomoyuki Tsuzuki

Tomoyuki Tsuzuki

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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Yuji Nishio

Yuji Nishio

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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David G. Binion

David G. Binion

Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, Wisconsin, U.S.A.

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Akira Imada

Akira Imada

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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Takafumi Ando

Takafumi Ando

First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

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First published: 14 December 2006
Citations: 3

Abstract

An intravenous infusion of cyclosporine A (CsA) shows clinical benefits in patients with steroid-resistant ulcerative colitis (UC). To clarify its mechanisms, we investigated the ability of CsA to inhibit the functions of neutrophils and T cells. The cytotoxic activity by mucosal T cells was analyzed by anti-CD3-triggered cytotoxicity after lamina propria mononuclear cells were cultured with recombinant interleukin (IL)-2. The chemotactic response, the generation of superoxide, and the production of chemokines, IL-8, and macrophage inflammatory protein-1α by neutrophils were examined using a multiple-well chamber assay, a chemiluminescence method, and an enzyme-linked immunosorbent assay (ELISA), respectively. Mucosal chemokine activity was determined by an ELISA using the organ culture supernatant of mucosal biopsy tissues. Pretreatment with CsA caused consistent inhibitions of cytotoxic activity by mucosal T cells and chemotactic migration, superoxide generation, and chemokine production by neutrophils mostly in a dose-dependent manner. In patients who received an intravenous infusion of CsA, mucosal chemokine activity decreased after therapy in parallel with decreases in the numbers of neutrophils and mononuclear cells in the biopsy tissues. These results suggest that suppressive effects of CsA on neutrophils and T cells may be related to therapeutic benefits in patients with steroid-resistant UC.

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