Evidence map›Paper›PMID 29475907›Full record

ArticleIn vivo (Athens, Greece)

Anti-inflammatory Activity of β-Carotene, Lycopene and Tri-

Akifumi Kawata, Yukio Murakami, Seiji Suzuki, Seiichiro Fujisawa

Open access · diamondAbstract read
In one paragraph

Article in In vivo (Athens, Greece). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed, 1 pooled it
6.5field-weighted citation impact, top 2% 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

59 citing papers in PubMed, 1 synthesis or guideline pooled it, 103 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Akifumi KawataDivision of Oral Diagnosis and General Dentistry, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Japan.
Yukio MurakamiDivision of Oral Diagnosis and General Dentistry, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Japan ymura@dent.meikai.ac.jp.
Seiji SuzukiDivision of Oral Diagnosis and General Dentistry, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Japan.
Seiichiro FujisawaDivision of Oral Diagnosis and General Dentistry, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Japan.
Meikai University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

aimThe polyene carotenoids β-carotene and lycopene are antioxidants that not only quench singlet oxygen but also inhibit lipid peroxidation. Tri-n-butyl borane (TBB) is used as an initiator for dental resin materials and is extremely reactive with oxygen and reactive oxygen species (ROS). This reactionability of TBB may be analogous to that of carotenoids with ROS. To clarify the biological activity of such ROS scavengers, we investigated the anti-inflammatory activity of β-carotene, lycopene and TBB in terms of the expression of RNA for lipopolysaccharide (LPS)-induced cyclooxygenase-2 (Cox2), nitric oxide synthase 2 (Nos2) and tumor necrosis factor-alpha (Tnfa), and mRNA expression and up-regulation of heme oxygenase 1 (Hmox1) mRNA in RAW264.7 cells. MATERIALS AND

methodsmRNA expression was investigated using real-time reverse transcriptase-polymerase chain reaction (PCR). The antioxidant activity of carotenoids was evaluated using the induction period method in the azobisisobutyronitrile or benzoyl peroxide-methyl methacrylate system.

resultsHmox1 mRNA, but not Cox2 and Nos2 mRNA, was up-regulated by 100 μM β-carotene and lycopene, and by 0.125% TBB. LPS-stimulated Cox2, Nos2 and Tnfa gene expression was inhibited by 50 μM β-carotene and lycopene, and by 0.5-1% TBB. Both β-carotene and lycopene had weak antioxidant activity, but β-carotene showed pro-oxidant activity at higher concentrations.

conclusionThe anti-inflammatory activity of β-carotene, lycopene and TBB may be related to their ROS-scavenging activity. Additionally, the activity of carotenoids and TBB may be attributed to the electrophilicity of ROS-induced carotenoid intermediates and boranes, respectively. Their anti-inflammatory activity may be attributable to enhancement of the potency of the electrophile/antioxidant response element transcription system in view of their up-regulation of Hmox1 mRNA expression.

Indexed as

AnimalsAnti-Inflammatory Agentsbeta CaroteneBoron CompoundsCarotenoidsCyclooxygenase 2Free Radical ScavengersGene ExpressionHeme Oxygenase-1LipopolysaccharidesLycopeneMacrophagesMiceMolecular StructureNitric Oxide Synthase Type IIRAW 264.7 CellsAnti-Inflammatory Agentsbeta CaroteneBoron CompoundsCarotenoidsCyclooxygenase 2Free Radical ScavengersHeme Oxygenase-1LipopolysaccharidesLycopeneNitric Oxide Synthase Type IIReactive Oxygen SpeciesRNA, Messengertri-n-butylboraneCOX2HMOX1LPSlycopeneNOS2RAW264.7 cellstri-n-butyl boraneβ-Carotene

Identifiers

PMID29475907
PMCPMC5905192
OpenAlexW2788927467

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.