Abstract
Objective and design
To examine the effect of 3-[(dodecylthiocarbonyl)-methyl]-glutarimide (DTCM-G), a novel anti-inflammatory agent that inhibits lipopolysaccharide (LPS) activation of RAW264.7 macrophages, on murine models of colitis and RAW264.7 cells.
Materials and methods
Colitis was induced by rectally infusing trinitrobenzenesulfonic acid (TNBS) (1.5 mg in 50 % ethanol) in BALB/c mice or orally administering 3 % dextran sulfate sodium (DSS) for 5 days in C57BL/6 mice. The severity of colitis was assessed after intraperitoneally injecting DTCM-G (40 mg/kg). The anti-inflammatory properties of DTCM-G and its mechanisms were investigated in LPS-stimulated RAW264.7 cells.
Results
DTCM-G significantly ameliorated TNBS-induced colitis, according to the body weight loss, disease activity index, colonic obstruction, macroscopic colonic inflammation score, mucosal myeloperoxidase activity, and histopathology. Immunohistochemistry and isolated lamina propria mononuclear cells showed significantly reduced colonic F4/80+ and CD11b+ macrophage infiltration. DTCM-G significantly suppressed tumor necrosis factor (TNF)-α and interleukin (IL)-6 messenger RNA expression in the colon and attenuated DSS-induced colitis, according to the disease activity index and histopathology. In RAW264.7 cells, DTCM-G suppressed LPS-induced TNF-α/IL-6 production and enhanced glycogen synthase kinase-3β phosphorylation.
Conclusions
DTCM-G attenuated murine experimental colitis by inhibiting macrophage infiltration and inflammatory cytokine expression. Thus, DTCM-G may be a promising treatment for inflammatory bowel disease.
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Acknowledgments
This study was supported in part by funding from the Promotion of Fundamental Studies in Health Sciences initiative of the National Institute of Biomedical Innovation and a Grant-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science.
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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All the procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
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Responsible Editor: Yoshiya Tanaka.
Kenichiro Yamashita and Satoru Todo have contributed equally as senior authors.
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Ichikawa, N., Yamashita, K., Funakoshi, T. et al. Novel anti-inflammatory agent 3-[(dodecylthiocarbonyl)-methyl]-glutarimide ameliorates murine models of inflammatory bowel disease. Inflamm. Res. 65, 245–260 (2016). https://doi.org/10.1007/s00011-015-0911-0
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DOI: https://doi.org/10.1007/s00011-015-0911-0