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Lobolide, a diterpene, blockades the NF-κB pathway and p38 and ERK MAPK activity in macrophages in vitro.

Abstract：

AIM:Recent studies have shown that constitutive activation of the nuclear factor κB (NF-κB) plays a key role in chronic inflammation and cancers. The aim of this study was to characterize lobolide, a cembrane diterpene, as a drug candidate targeting the NF-κB signaling pathway. METHODS:A HEK 293/NF-κB-Luc stable cell line was constructed to evaluate the effect of lobolide on NF-κB activation. THP-1 human monocytes and peripheral blood mononuclear cells (PBMCs) from healthy volunteers were tested. Lipopolysaccharide (LPS)-induced TNFα and IL-1β production and activation of the TAK1-IKK-NF-κB pathway were studied using ELISA and Western blot analysis. RESULTS:In HEK 293/NF-κB-Luc stable cells, lobolide (0.19-50 μmol/L) inhibited NF-κB activation in a concentration-dependent manner with an IC(50) value of 4.2 ± 0.3 μmol/L. Treatment with lobolide (2.5-10 μmol/L) significantly suppressed LPS-induced production of TNFα and IL-1β in both THP-1 cells and PBMCs. In THP-1 cells, the suppression was partially caused by blockade of the translocation of NF-κB from the cytoplasm to the nucleus via affecting the TAK1-IKK-NF-κB pathway and p38 and ERK MAPK activity. CONCLUSION:Lobolide is a potential inhibitor of the NF-κB pathway, which blocks the translocation of NF-κB from the cytoplasm to the nucleus. Lobolide inhibits LPS-stimulated TNFα and IL-1β release, suggesting that the compound might be an anti-inflammatory compound.

journal_name

Acta Pharmacol Sin

journal_title

Acta pharmacologica Sinica

authors

Lv XF,Chen SH,Li J,Fang JP,Guo YW,Ding K

doi

10.1038/aps.2012.100

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

1293-300

issue

10

eissn

1671-4083

issn

1745-7254

pii

aps2012100

journal_volume

33

pub_type

杂志文章

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