tailieunhanh - Báo cáo y học: " The anti-inflammatory effects of the tellurium redox modulating compound, AS101, are associated with regulation of NFB signaling pathway and nitric oxide induction in macrophages"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: The anti-inflammatory effects of the tellurium redox modulating compound, AS101, are associated with regulation of NF B signaling pathway and nitric oxide induction in macrophages. | Brodsky et al. Journal of Inflammation 2010 7 3 http content 7 1 3 JOURNAL OF INFLAMMATION RESEARCH Open Access The anti-inflammatory effects of the tellurium redox modulating compound AS101 are associated with regulation of NFkB signaling pathway and nitric oxide induction in macrophages Miri Brodsky 1 Gilad Halpert1 Michael Albeck2 Benjamin Sredni1 Abstract Background LPS-activated macrophages produce mediators which are involved in inflammation and tissue injury and especially those associated with endotoxic shock. The non toxic tellurium compound ammonium tri-chloro dioxoethylene-O O - tellurate AS101 has been recently shown to exert profound anti-inflammatory properties in animal models associated with its Te IV redox chemistry. This study explores the anti-inflammatory properties of AS101 with respect to modulation of inflammatory cytokines production and regulation of iNOS transcription and expression in activated macrophages via targeting the NFkB complex. Results AS101 decreased production of IL-6 and in parallel down-regulated LPS-induced iNOS expression and NO secretion by macrophages. AS101 reduced IkB phosphorylation and degradation and reduced NFkB nuclear translocalization albeit these effects were exerted at different kinetics. Chromatin immunoprecipitation assays showed that AS101 treatment attenuated p50-subunit ability to bind DNA at the NFkB consensus site in the iNOS promotor following LPS induction. Conclusions Besides AS101 the investigation of therapeutic activities of other tellurium IV compounds is scarce in the literature although tellurium is the fourth most abundant trace element in the human body. Since IKK and NFkB may be regulated by thiol modifications we may thus envisage inview of our integrated results that Te IV compounds may have important roles in thiol redox biological activity in the human body and represent a new class of anti-inflammatory compounds. Introduction Inflammation is the central .

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