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Water extract of Artemisia scoparia Waldst. & Kitam suppresses LPS-induced cytokine production and NLRP3 inflammasome activation in macrophages and alleviates carrageenan-induced acute inflammation in mice

Title
Water extract of Artemisia scoparia Waldst. & Kitam suppresses LPS-induced cytokine production and NLRP3 inflammasome activation in macrophages and alleviates carrageenan-induced acute inflammation in mice
Authors
Ahn, Jae-HunPark, Yae-LyeonSong, A-YoungKim, Wan-GyuJe, Chang-YunJung, Do-HyeonKim, Yeong-JunOh, JisuCho, Jeong-YongKim, Dong-JaePark, Jong-Hwan
DGIST Authors
Ahn, Jae-Hun; Park, Yae-Lyeon; Song, A-Young; Kim, Wan-Gyu; Je, Chang-Yun; Jung, Do-Hyeon; Kim, Yeong-Jun; Oh, Jisu; Cho, Jeong-Yong; Kim, Dong-Jae; Park, Jong-Hwan
Issue Date
2021-03
Citation
Journal of Ethnopharmacology, 268, 113606
Type
Article
Article Type
Article
Author Keywords
Artemisia scopariaInflammationNLRP3 inflammasomeCarrageenan-induced inflammation
Keywords
CHEMICAL-COMPOSITIONGRO-ALPHAIN-VITROEXPRESSIONRATS
ISSN
0378-8741
Abstract
Ethnopharmacological relevance: Artemisia scoparia Waldst. & Kitam (A. scoparia) is a perennial herbal plant that is widely used as a folk remedy in Asian countries. Several studies have demonstrated that A. scoparia has various physiological effects, including anti-inflammation, anti-hypertension, anti-obesity, anti-hepatotoxicity, and anti-oxidant effects. Aim of the study: The objective of the present study was to examine the anti-inflammatory effects of water extract of A. scoparia (WAS). Materials and methods: Murine bone marrow-derived macrophages (BMDMs), human monocyte THP-1 and murine fibroblast 3T3-L1 cells were used for the in vitro experiments. Cell viability and cytokine production were determined by the MTT assay and ELISA, respectively. RT-PCR was performed to determine iNOS gene expression and the Griess reaction was used to measure nitrite levels. iNOS protein expression, activation of NF-κB and MAPKs, and cleavage of caspase-1 and IL-1β were determined by Western blot analysis. A carrageenan-induced mouse model of acute inflammation was used in the in vivo experiments. Results: Pretreatment with WAS concentration-dependently suppressed gene expression and IL-6, TNF-α, CXCL1 and iNOS protein levels in BMDMs stimulated with LPS. In addition, pretreatment with WAS inhibited LPS-induced production of IL-6 and TNF-α in THP-1 cells and CXCL1 in 3T3-L1. Furthermore, LPS induced phosphorylation of p65 in BMDMs, and this induction was dramatically suppressed by WAS pretreatment. We further investigated whether WAS regulates activation of the NLRP3 inflammasome, which is known to be essential for IL-1β processing. WAS inhibited the production of IL-1β, but not IL-6, in response to adenosine triphosphate (ATP) and monosodium uric acid (MSU) crystals in LPS-primed BMDMs. Cleavage of caspase-1 and IL-1β was also reduced by WAS. We finally evaluated the in vivo anti-inflammatory effects of WAS in a mouse model of carrageenan-induced acute inflammation. Subcutaneous administration of WAS reduced production of the inflammatory cytokines IL-6, TNF-α, CXCL1, and IL-1β. Recruitment of immune cells, mostly neutrophils, was also reduced by administration of WAS. Infiltration of inflammatory cells and edema in the submucosa of air pouch tissues were markedly improved in the WAS-treated groups. Conclusions: Our results indicate that WAS possesses potent anti-inflammatory properties. These findings suggest that A. scoparia is a candidate functional food targeting several inflammatory diseases.
URI
http://hdl.handle.net/20.500.11750/12825
DOI
10.1016/j.jep.2020.113606
Publisher
Elsevier BV
Related Researcher
Files:
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Collection:
Laboratory Animal Resource Center1. Journal Articles


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