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Research ArticleOriginal Article

A Novel Cyclohexene Derivative, Ethyl (6R)-6-[N-(2-Chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate (TAK-242), Selectively Inhibits Toll-Like Receptor 4-Mediated Cytokine Production through Suppression of Intracellular Signaling

Masayuki Ii, Naoko Matsunaga, Kaoru Hazeki, Kazuyo Nakamura, Katsunori Takashima, Tsukasa Seya, Osamu Hazeki, Tomoyuki Kitazaki and Yuji Iizawa
Molecular Pharmacology April 2006, 69 (4) 1288-1295; DOI: https://doi.org/10.1124/mol.105.019695
Masayuki Ii
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Naoko Matsunaga
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Kaoru Hazeki
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Kazuyo Nakamura
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Katsunori Takashima
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Tsukasa Seya
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Osamu Hazeki
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Tomoyuki Kitazaki
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Yuji Iizawa
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Abstract

Proinflammatory mediators such as cytokines and NO play pivotal roles in various inflammatory diseases. To combat inflammatory diseases successfully, regulation of proinflammatory mediator production would be a critical process. In the present study, we investigated the in vitro effects of ethyl (6R)-6-[N-(2-chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate (TAK-242), a novel small molecule cytokine production inhibitor, and its mechanism of action. In RAW264.7 cells and mouse peritoneal macrophages, TAK-242 suppressed lipopolysaccharide (LPS)-induced production of NO, tumor necrosis factor-α (TNF-α), and interleukin (IL)-6, with 50% inhibitory concentration (IC50) of 1.1 to 11 nM. TAK-242 also suppressed the production of these cytokines from LPS-stimulated human peripheral blood mononuclear cells (PBMCs) at IC50 values from 11 to 33 nM. In addition, the inhibitory effects on the LPS-induced IL-6 and IL-12 production were similar in human PBMCs, monocytes, and macrophages. TAK-242 inhibited mRNA expression of IL-6 and TNF-α induced by LPS and interferon-γ in RAW264.7 cells. The phosphorylation of mitogen-activated protein kinases induced by LPS was also inhibited in a concentration-dependent manner. However, TAK-242 did not antagonize the binding of LPS to the cells. It is noteworthy that TAK-242 suppressed the cytokine production induced by Toll-like receptor (TLR) 4 ligands, but not by ligands for TLR2, -3, and -9. In addition, IL-1β-induced IL-8 production from human PBMCs was not markedly affected by TAK-242. These data suggest that TAK-242 suppresses the production of multiple cytokines by selectively inhibiting TLR4 intracellular signaling. Finally, TAK-242 is a novel small molecule TLR4 signaling inhibitor and could be a promising therapeutic agent for inflammatory diseases, whose pathogenesis involves TLR4.

  • Received October 11, 2005.
  • Accepted December 22, 2005.
  • The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 69 (4)
Molecular Pharmacology
Vol. 69, Issue 4
1 Apr 2006
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A Novel Cyclohexene Derivative, Ethyl (6R)-6-[N-(2-Chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate (TAK-242), Selectively Inhibits Toll-Like Receptor 4-Mediated Cytokine Production through Suppression of Intracellular Signaling
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Research ArticleOriginal Article

A Novel Cyclohexene Derivative, Ethyl (6R)-6-[N-(2-Chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate (TAK-242), Selectively Inhibits Toll-Like Receptor 4-Mediated Cytokine Production through Suppression of Intracellular Signaling

Masayuki Ii, Naoko Matsunaga, Kaoru Hazeki, Kazuyo Nakamura, Katsunori Takashima, Tsukasa Seya, Osamu Hazeki, Tomoyuki Kitazaki and Yuji Iizawa
Molecular Pharmacology April 1, 2006, 69 (4) 1288-1295; DOI: https://doi.org/10.1124/mol.105.019695

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Research ArticleOriginal Article

A Novel Cyclohexene Derivative, Ethyl (6R)-6-[N-(2-Chloro-4-fluorophenyl)sulfamoyl]cyclohex-1-ene-1-carboxylate (TAK-242), Selectively Inhibits Toll-Like Receptor 4-Mediated Cytokine Production through Suppression of Intracellular Signaling

Masayuki Ii, Naoko Matsunaga, Kaoru Hazeki, Kazuyo Nakamura, Katsunori Takashima, Tsukasa Seya, Osamu Hazeki, Tomoyuki Kitazaki and Yuji Iizawa
Molecular Pharmacology April 1, 2006, 69 (4) 1288-1295; DOI: https://doi.org/10.1124/mol.105.019695
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