Abstract
Objective
We have previously synthesized a novel piperidine compound, 3-[(dodecylthiocarbonyl)methyl]glutarimide (DTCM-glutarimide), that inhibits LPS-induced NO production, and in the present research we studied further the anti-inflammatory activity of DTCM-glutarimide in a macrophage cell line and in mice bearing transplanted hearts.
Materials and methods
Mouse macrophage-like RAW264.7 cells were employed for the evaluation of cellular inflammatory activity. DTCM-glutarimide was synthesized in our laboratory. The AP-1 activity was measured by nuclear translocation and phosphorylation. For the heart transplantation experiment, male C57BL/6 (H-2b) and BALB/c (H-2d) mice were used as donor and recipient, respectively. DTCM-glutarimide was administered intraperitoneally.
Results
DTCM-glutarimide inhibited the LPS-induced expression of iNOS and COX-2 in macrophages; but, unexpectedly, it did not inhibit LPS-induced NF-κB activation. Instead, it inhibited the nuclear translocation of both c-Jun and c-Fos. It also inhibited LPS-induced c-Jun phosphorylation. Moreover, it inhibited the mixed lymphocyte reaction in primary cultures of mouse spleen cells; and furthermore, in mice it prolonged the graft survival in heart transplantation experiments.
Conclusion
The novel piperidine compound, DTCM-glutarimide, was found to be a new inhibitor of macrophage activation, inhibiting AP-1 activity. It also inhibited graft rejection in mice, and thus may be a candidate for an anti-inflammatory agent.
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Acknowledgments
This work was financially supported in part by grants from the program Grants-in-Aid for Scientific Research on Priority Areas of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT). It was also supported by a High-Tech Research Center Project for Private Universities: matching fund subsidy from MEXT, 2006–2011, and the Global Center of Excellence Program from MEXT, 2007–2012.
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Takeiri, M., Tachibana, M., Kaneda, A. et al. Inhibition of macrophage activation and suppression of graft rejection by DTCM-glutarimide, a novel piperidine derived from the antibiotic 9-methylstreptimidone. Inflamm. Res. 60, 879–888 (2011). https://doi.org/10.1007/s00011-011-0348-z
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DOI: https://doi.org/10.1007/s00011-011-0348-z