Evidence map›Paper›PMID 38573419›Full record

ArticleJournal of natural medicines2024

Compound-compound interaction analysis of baicalin and berberine derivatives in aqueous solution.

Yoshinori Uekusa, Chiharu Tanioka, Kenjiro Nakamoto, Riina Tsutsumi, Chihiro Iida, Naoto Enshu, Takehiro Nishimura, Fumiyuki Kiuchi, Haruhisa Kikuchi

Abstract read
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In one paragraph

Article in Journal of natural medicines, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
1.8field-weighted citation impact, top 16% 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

3 citing papers in PubMed, 4 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

9 authors at 1 institution in 1 country.

Yoshinori UekusaDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan. uekusa-ys@keio.jp.ORCID http://orcid.org/0000-0003-1654-5403
Chiharu TaniokaDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Kenjiro NakamotoDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Riina TsutsumiDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Chihiro IidaDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Naoto EnshuDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Takehiro NishimuraDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.ORCID http://orcid.org/0000-0002-6600-9193
Fumiyuki KiuchiDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan.
Haruhisa KikuchiDivision of Natural Medicines, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-Ku, Tokyo, 105-8512, Japan. halkiku@keio.jp.ORCID http://orcid.org/0000-0001-6938-0185
Keio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Baicalin and berberine are biologically active constituents of the crude drugs Scutellaria root and Coptis rhizome/Phellodendron bark, respectively. Baicalin and berberine are reported to combine together as a 1:1 complex that forms yellow precipitates by electrostatic interaction in decoctions of Kampo formulae containing these crude drugs. However, the structural basis and mechanism for the precipitate formation of this compound-compound interaction in aqueous solution remains unclarified. Herein, we searched for berberine derivatives in the Coptis rhizome that interact with baicalin and identified the chemical structures involved in the precipitation formation. Precipitation assays showed that baicalin formed precipitates with berberine and coptisine but not with palmatine and epiberberine. Thus, the 2,3-methylenedioxy structure may be crucial to the formation of the precipitates, and electrostatic interaction is necessary but is not sufficient. In this multicomponent system experiment, palmatine formed a dissociable complex with baicalin and may competitively inhibit the formation of berberine and coptisine precipitation with baicalin. Therefore, the precipitation formed by berberine and baicalin was considered to be caused by the aggregation of the berberine-baicalin complex, and the 2,3-methylenedioxy structure is likely crucial to the aggregation of the complex.

Indexed as

BerberineFlavonoidsBerberine AlkaloidsCoptisMolecular StructureRhizomeWaterbaicalinBerberineBerberine AlkaloidscoptisineFlavonoidspalmatineWater2,3-MethylenedioxyisoquinolineBaicalin–berberine interactionComplexPrecipitate formation

Identifiers

PMID38573419
OpenAlexW4393947899

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.