RESUMEN
Nuclear factor kappa B (NF-kappaB) plays a wide variety of pathophysiological roles and modulation of its pathway can be a good novel drug target. Here, we found that our recently synthesized NF-kappaB inhibitor attenuated an ovalbumin-specific delayed-type hypersensitivity response in vivo and suppressed production of IL-12 by dendritic cells and TH1 cytokines by T cells in vitro. These findings suggest that the activation of NF-kappaB mounts TH1 type immune responses, and that this new NF-kappaB inhibitor has a therapeutic potential in this context.
Asunto(s)
Indanos/química , Indanos/metabolismo , FN-kappa B/antagonistas & inhibidores , FN-kappa B/inmunología , Células TH1/inmunología , Animales , Línea Celular , Células Dendríticas/inmunología , Femenino , Humanos , Hipersensibilidad Tardía/tratamiento farmacológico , Hipersensibilidad Tardía/inmunología , Indanos/uso terapéutico , Inflamación/inmunología , Interleucina-12/metabolismo , Activación de Linfocitos , Ratones , Ratones Endogámicos C57BL , Piel/inmunología , Piel/efectos de la radiación , Rayos UltravioletaRESUMEN
BACKGROUND: Nuclear factor kappa B (NF-kappaB) is activated by several factors, which increase the inflammatory response, and this activation, in turn, leads to the expression of several genes such as cytokines, and may play an important role in cardiovascular diseases. AIMS: The aim of the study is to examine the effect of SUN C8079, a newly synthesized NF-kappaB inhibitor in vitro and in vivo. METHODS: We examined the effects of SUN C8079 on the transcriptional responses of NF-kappaB, on activation of NF-kappaB in electrophoretic mobility shift assay, and on the gene expressions of tumor necrosis factor (TNF)-alpha and iNOS. We also studied effects of SUN C8079 on lethal endotoxemia and viral myocarditis in mice. RESULTS: SUN C8079 inhibited the lipopolysaccharide (LPS)-induced expression of the genes of TNF-alpha and iNOS by inhibiting the activation of NF-kappaB in vitro. SUN C8079 inhibited the systemic release of TNF-alpha and improved mortality in LPS-treated mice. In addition to protecting mice against lethal endotoxemia, SUN C8079 prevented the development of myocarditis due to the encephalomyocarditis virus (EMCV), and inhibited the expressions of proinflammatory cytokines and the iNOS gene in cardiac tissues. CONCLUSION: These findings suggest that the activation of NF-kappaB plays an important role in the pathogenesis of endotoxemia and viral myocarditis, and that the NF-kappaB inhibitor, SUN C8079, may be therapeutic in these disorders.