Abstract:
:Peroxisome proliferator-activated receptor gamma (PPARgamma) is a ligand-dependent nuclear receptor and regulates adipogenesis and fat metabolism. PPARgamma is activated by fatty acid derivatives and some synthetic compounds such as the thiazolidinediones. In addition, certain cytokines were known to affect the transactivation function of PPARgamma. However, the molecular mechanism of the functional interaction between PPARgamma and cytokine signaling remains unclear. We found that combined treatment of PPARgamma and cytokines (IL-1 or TNF-alpha) inhibited adipogenesis and induced osteoblastgenesis in bone marrow-derived mesenchymal stem cells. Furthermore, we showed that the ligand dependent transactivation function of PPARgamma was suppressed by IL-1 and TNF-alpha. This suppression was mediated through NF-kappaB activated by the TAK1/TAB1-NIK cascade, a downstream cascade triggered with IL-1 or TNF-alpha signaling. Thus, we have identified a molecular mechanism of functional cross-talk between PPARgamma and cytokine signaling that may provide a theoretical basis for development of novel therapeutical strategies and design of novel compounds for treatment of obesity, diabetes, and some other chronic diseases.
journal_name
J Pharmacol Scijournal_title
Journal of pharmacological sciencesauthors
Takada I,Suzawa M,Kato Sdoi
10.1254/jphs.fmj04008x5subject
Has Abstractpub_date
2005-02-01 00:00:00pages
184-9issue
2eissn
1347-8613issn
1347-8648pii
JST.JSTAGE/jphs/FMJ04008X5journal_volume
97pub_type
杂志文章,收录出版,评审abstract::The aim of this study was to characterize the effects of rebamipide on the oxidative burst of human neutrophils. The neutrophil oxidative burst was measured in the presence of rebamipide and cimetidine using lucigenin- or luminol-dependent chemiluminescence (LgCL or LmCL). Rebamipide inhibited the LmCL response stimul...
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