Evidence map›Paper›PMID 33598775›Full record

ArticleEuropean journal of nutrition2021

Fucoxanthin inhibits lipopolysaccharide-induced inflammation and oxidative stress by activating nuclear factor E2-related factor 2 via the phosphatidylinositol 3-kinase/AKT pathway in macrophages.

Mi-Bo Kim, Hyunju Kang, Yang Li, Young-Ki Park, Ji-Young Lee

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In one paragraph

Article in European journal of nutrition, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
6.6field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

  1. Pooled it
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  11. Xanthophyll-Rich Extract ofMolecules (Basel, Switzerland) · 2023
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Mi-Bo KimDepartment of Nutritional Sciences, University of Connecticut, 27 Manter Rd., Storrs, CT, 06269, USA.
Hyunju KangDepartment of Nutritional Sciences, University of Connecticut, 27 Manter Rd., Storrs, CT, 06269, USA.
Yang LiDepartment of Nutritional Sciences, University of Connecticut, 27 Manter Rd., Storrs, CT, 06269, USA.
Young-Ki ParkDepartment of Nutritional Sciences, University of Connecticut, 27 Manter Rd., Storrs, CT, 06269, USA.
Ji-Young LeeDepartment of Nutritional Sciences, University of Connecticut, 27 Manter Rd., Storrs, CT, 06269, USA. ji-young.lee@uconn.edu.ORCID http://orcid.org/0000-0002-7945-793X
University of Connecticut · US

Funding

National Research Foundation of Korea 2019R1A6A3A03032678
6 · The paper itself

Abstract

purposeAnti-inflammatory and antioxidant effects of fucoxanthin (FCX), a xanthophyll carotenoid, have been suggested. However, underlying mechanisms are elusive. The objective of this study was to elucidate the mechanisms by which FCX and its metabolites inhibit lipopolysaccharide (LPS)-induced inflammation and oxidative stress in macrophages.

methodsThe effects of the FCX on mRNA and protein expression of pro-inflammatory cytokines and antioxidant genes, and reactive oxygen species (ROS) accumulation were determined in RAW 264.7 macrophages. A potential role of FCX in the modulation of phosphatidylinositol 3-kinase (PI3K)/AKT/nuclear E2-related factor 2 (NRF2) axis was evaluated.

resultsFCX significantly decreased LPS-induced interleukin (Il)6, Il1b, and tumor necrosis factor α (Tnf) mRNA abundance and TNFα secretion. FCX attenuated LPS or tert-butyl-hydroperoxide-induced ROS accumulation with concomitant increases in the expression of antioxidant enzymes. Also, trolox equivalent antioxidant capacity assay demonstrated that FCX had a potent free radical scavenging property. FCX markedly increased nuclear translocation of NRF2 in LPS-treated macrophages, consequently inducing its target gene expression. Interestingly, the effect of FCX on NRF2 nuclear translocation was noticeably diminished by LY294002, an inhibitor of PI3K, but not by inhibitors of mitogen-activated protein kinases. Phosphorylation of AKT, a downstream element of PI3K, was also markedly increased by FCX. FCX metabolites, such as fucoxanthinol and amarouciaxanthin A, significantly attenuated LPS-induced ROS accumulation and pro-inflammatory cytokine expression.

conclusionFCX exerts anti-inflammatory and antioxidant effects by the activation of NRF2 in the macrophages activated by LPS, which is mediated, at least in part, through the PI3K/AKT pathway.

Indexed as

LipopolysaccharidesNF-E2-Related Factor 2HumansInflammationMacrophagesOxidative StressPhosphatidylinositol 3-KinasePhosphatidylinositol 3-KinasesProto-Oncogene Proteins c-aktSignal TransductionXanthophyllsfucoxanthinLipopolysaccharidesNF-E2-Related Factor 2Phosphatidylinositol 3-KinasePhosphatidylinositol 3-KinasesProto-Oncogene Proteins c-aktXanthophyllsFucoxanthinInflammationMacrophagesNRF2Oxidative stressPI3KXanthophyll

Identifiers

PMID33598775
OpenAlexW3132270682

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.