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. 1993;2(6):417–422. doi: 10.1155/S0962935193000596

Endothelin-1 stimulates human monocytes in vitro to release TNF-α , IL-1β and IL-6

E Helset 1,✉, T Sildnes 1, R Seljelid 2, ZS Konopski 2
PMCID: PMC2365438  PMID: 18475557

Abstract

Increased plasma- and tissue levels of endothelin-1 (ET-1) during inflammatory diseases, have suggested a role of ET-1 in the pathophysiology of inflammatory reactions. The authors have studied the effect of ET-1 on cytokine release from monocytes and monocyte-derived macrophages. ET-1 increased secretion of TNF-α, IL-1β and IL-6 in a dose- and time-dependent manner. Optimal ET-1 concentration ranged from 0.01 to 1 nM. The maximal response was a 200 to 400% increase in cytokine release. A time-course study revealed that the pattern of cytokines induced by ET-1 was different in monocytes and macrophages, although an early increase in TNF-α was observed in both monocyte and macrophage supernatants. In conclusion, ET-1 stimulates monocytes and macrophages to release cytokines thereby demonstrating a potential role for ET-1 in regulation of inflammatory responses.

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Selected References

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