Evidence map›Paper›PMID 41099792›Full record

ArticleJournal of natural medicines2026

Selective α-glucosidase inhibitory activity of (+)-eupenoxide and 3-ketone derivatives produced by the endophytic fungus of Aspergillus sp.

Shoji Maehara, Sachi Shibata, Chiho Takahara, Moeka Kumamoto, Yuhzo Hieda, Shogo Nakajima, Koichi Watashi, Toshiyuki Hata

Abstract read
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In one paragraph

Article in Journal of natural medicines, 2026. 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
–field-weighted citation impact
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.

  1. Article
  2. 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

8 authors.

Shoji MaeharaFaculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Sanzo, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan. smaehara@fukuyama-u.ac.jp.ORCID http://orcid.org/0000-0001-5787-6546
Sachi ShibataDepartment of Nutritional Science, Faculty of Health and Welfare Science, Okayama Prefectural University, Okayama, 719-1197, Japan.
Chiho TakaharaFaculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Sanzo, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan.
Moeka KumamotoFaculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Sanzo, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan.
Yuhzo HiedaCommon Resources Center, Fukuyama University, 985-1, Sanzo, Higashimura-cho, Fukuyama, Hiroshima, 729-0292, Japan.
Shogo NakajimaDepartment of Drug Development, National Institute of Infectious Diseases, Japan Institute for Health Security, Toyama 1-23-1, Shinjuku-ku, Tokyo, 162-8640, Japan.
Koichi WatashiDepartment of Drug Development, National Institute of Infectious Diseases, Japan Institute for Health Security, Toyama 1-23-1, Shinjuku-ku, Tokyo, 162-8640, Japan.
Toshiyuki HataFaculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Sanzo, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan.

Funding

Japan Agency for Medical Research and Development JP25ak0101271Japan Agency for Medical Research and Development JP25fk0310525Japan Society for the Promotion of Science JP23K06189Japan Society for the Promotion of Science JP24K02290JST-Mirai Program JPMJMI22G1
6 · The paper itself

Abstract

α-Glucosidase and α-amylase are two important glycosidases involved in carbohydrate metabolism. Inhibitors of these enzymes are considered crucial therapeutic agents for carbohydrate absorption disorders such as diabetes and obesity. However, the inhibition of salivary amylase can result in undigested starch reaching the stomach, causing indigestion and potentially leading to gastric and duodenal ulcers as well as gastritis. Selective inhibitors that possess α-glucosidase inhibitory activity without affecting α-amylase are needed to address this issue. It has been revealed that (+)-eupenoxide and its 3-ketone derivative, produced by the endophytic fungus of Aspergillus sp. C-1-1 strain associated with Catharanthus roseus, selectively inhibits α-glucosidase. Additionally, from the α-glucosidase inhibitory activity of related compounds, we have successfully deduced the chemical structure feature necessary for α-glucosidase inhibition.

Indexed as

AspergillusGlycoside Hydrolase InhibitorsKetonesalpha-GlucosidasesEndophytesMolecular Structurealpha-GlucosidasesGlycoside Hydrolase InhibitorsKetonesAspergillus spEndophytic fungi(+)-eupenoxideα-glucosidase

Identifiers

What OpenQuestion holds

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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.