Evidence map›Paper›PMID 26419945›Full record

ArticleScientific reports2015

Ginkgo biloba leaf extract induces DNA damage by inhibiting topoisomerase II activity in human hepatic cells.

Zhuhong Zhang, Si Chen, Hu Mei, Jiekun Xuan, Xiaoqing Guo, Letha Couch, Vasily N Dobrovolsky, Lei Guo, Nan Mei

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
12.8field-weighted citation impact, top 1% 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

39 citing papers in PubMed, 73 citations in OpenAlex.

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  19. Potential Multifunctional Bioactive Compounds fromJournal of inflammation research · 2022
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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

9 authors at 2 institutions in 2 countries.

Zhuhong ZhangDivision of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Si ChenDivision of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Hu MeiCollege of Bioengineering, Chongqing University, Chongqing 400044, China.
Jiekun XuanDivision of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Xiaoqing GuoDivision of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Letha CouchDivision of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Vasily N DobrovolskyDivision of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Lei GuoDivision of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Nan MeiDivision of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
National Center for Toxicological Research · USChongqing University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ginkgo biloba leaf extract has been shown to increase the incidence in liver tumors in mice in a 2-year bioassay conducted by the National Toxicology Program. In this study, the DNA damaging effects of Ginkgo biloba leaf extract and many of its constituents were evaluated in human hepatic HepG2 cells and the underlying mechanism was determined. A molecular docking study revealed that quercetin, a flavonoid constituent of Ginkgo biloba, showed a higher potential to interact with topoisomerase II (Topo II) than did the other Ginkgo biloba constituents; this in silico prediction was confirmed by using a biochemical assay to study Topo II enzyme inhibition. Moreover, as measured by the Comet assay and the induction of γ-H2A.X, quercetin, followed by keampferol and isorhamnetin, appeared to be the most potent DNA damage inducer in HepG2 cells. In Topo II knockdown cells, DNA damage triggered by Ginkgo biloba leaf extract or quercetin was dramatically decreased, indicating that DNA damage is directly associated with Topo II. DNA damage was also observed when cells were treated with commercially available Ginkgo biloba extract product. Our findings suggest that Ginkgo biloba leaf extract- and quercetin-induced in vitro genotoxicity may be the result of Topo II inhibition.

Indexed as

DNA DamageDNA Topoisomerases, Type IIEnzyme ActivationGene Knockdown TechniquesGene SilencingGinkgo bilobaHepatocytesHep G2 CellsHumansModels, MolecularMolecular ConformationMutagensPlant ExtractsPlant LeavesQuercetinTopoisomerase II InhibitorsDNA Topoisomerases, Type IIMutagensPlant ExtractsQuercetinTopoisomerase II Inhibitors

Identifiers

PMID26419945
PMCPMC4588569
OpenAlexW2426726496

What OpenQuestion holds

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Registered trials

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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.