Novel iminobenzoxathiolone compound inhibits nuclear factor-kappaB activation targeting inhibitory kappaB kinase beta and down-regulating interleukin-1beta expression in lipopolysaccharide-activated macrophages.

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ID: 3627
2008
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Abstract
Benzoxathiolone derivatives have been reported to show pharmacological potentials in the psoriasis and acne. However, molecular basis for these pharmacological properties is little known. We postulated that the derivatives could mediate some of their pharmacological actions by modulating nuclear factor (NF)-kappaB activation, which is closely linked to the inflammatory and immune disorders. In this study, a novel iminobenzoxathiolone LYR-71 of 6-methyl-2-propylimino-6,7-dihydro-5H-benzo[1,3]oxathiol-4-one has been demonstrated to inhibit in vitro catalytic activity of inhibitory kappaB (IkappaB) kinase beta (IKKbeta), a key enzyme required for NF-kappaB activation, with an IC(50) value of 7 microM. LYR-71 inhibited IKKbeta-mediated phosphorylation of cytoplasmic IkappaBalpha in lipopolysaccharide (LPS)-activated macrophages, and sequentially preventing IkappaBalpha degradation as well as transcriptional activation of NF-kappaB. Furthermore, LYR-71 down-regulated LPS-induced transcription of interleukin (IL)-1beta or other cytokines in the cells, and inhibited expression vector IKKbeta-elicited IL-1beta promoter activity. Taken together, LYR-71 was an efficient inhibitor of IKKbeta, preventing NF-kappaB activation in macrophages, and this mechanism of action could contribute its down-regulatory effect on LPS-induced expression of inflammatory cytokines at the transcription level.
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kim2008novelbiochemical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kim, Min Hee;Lee, Hwa Young;Roh, Eunmiri;Kim, Byung Hak;Chung, Eun Yong;Lee, Yong Rok;Lee, In Jeong;Lee, Heesoon;Lee, Chong-Kil;Han, Sang-Bae;Kim, Youngsoo;
Journal biochemical pharmacology
Year 2008
DOI
10.1016/j.bcp.2008.05.013
URL
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