Evidence map›Paper›PMID 41801297›Full record

ArticleJournal of natural medicines2026

New meroterpenoids from Sargassum macrocarpum as inhibitors of amyloid β aggregation.

Mitsuhiro Sekiguchi, Mafumi Horiuchi, Seiya Shinoda, Joh Yamanaka, Yuta Tozawa, Yasuki Higashimura, Yusaku Miyamae, Hideyuki Shigemori

Abstract read
PubMed Publisher
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 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. Article
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.

Mitsuhiro SekiguchiGraduate School of Bioresources and Environmental Science, Faculty of Bioresources and Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi, Ishikawa, 921-8836, Japan. m-seki@ishikawa-pu.ac.jp.ORCID http://orcid.org/0000-0001-6780-4538
Mafumi HoriuchiGraduate School of Bioresources and Environmental Science, Faculty of Bioresources and Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi, Ishikawa, 921-8836, Japan.
Seiya ShinodaGraduate School of Bioresources and Environmental Science, Faculty of Bioresources and Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi, Ishikawa, 921-8836, Japan.
Joh YamanakaCollege of Agro-Biological Resource Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan.
Yuta TozawaGraduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan.
Yasuki HigashimuraGraduate School of Bioresources and Environmental Science, Faculty of Bioresources and Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi, Ishikawa, 921-8836, Japan.
Yusaku MiyamaeInstitute of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan.
Hideyuki ShigemoriInstitute of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan.ORCID http://orcid.org/0000-0001-9778-8057

Funding

Japan Society for the Promotion of Science 22K06664
6 · The paper itself

Abstract

Three new meroterpenoids, macrocarquinoids J(1)–L(3) were isolated from brown alga, Sargassum macrocarpum, along with sargahydroquinoic acid. The structures of 1–3 were elucidated with 2D NMR spectral data. The inhibitory activities of these compounds against Aβ42 aggregation were evaluated using thioflavin T assay and transmission electron microscopy. All three new meroterpenoids were found to be active, and macrocarquinoid L was the strongest among the three compounds. Furthermore, sargahydroquinoic acid significantly delayed the onset of paralysis in transgenic Caenorhabditis elegans, suggesting its potential inhibitory effect on amyloid aggregation.

Indexed as

Amyloid beta-PeptidesPeptide FragmentsSargassumTerpenesAnimalsAnimals, Genetically ModifiedCaenorhabditis elegansMagnetic Resonance SpectroscopyMicroscopy, Electron, TransmissionAmyloid beta-PeptidesPeptide FragmentsTerpenesAlzheimer′s diseaseAmyloid βBrown algaMeroterpenoidSargassum macrocarpum

Identifiers

What Socratic 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 Socratic graph.