Evidence map›Paper›PMID 29389956›Full record

ArticlePloS one2018

Euglena gracilis Z and its carbohydrate storage substance relieve arthritis symptoms by modulating Th17 immunity.

Kengo Suzuki, Ayaka Nakashima, Masaharu Igarashi, Keita Saito, Makoto Konno, Noriyuki Yamazaki, Hiroaki Takimoto

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

18 citing papers in PubMed, 33 citations in OpenAlex.

  1. Effects ofNutrients · 2020
    Trial
  2. Article
  3. Article
  4. Frontiers in microbiology · 2026
    Article
  5. Review
  6. Unveiling Immunomodulatory Effects ofJournal of microbiology and biotechnology · 2024
    Article
  7. Article
  8. Review
  9. Frontiers in nutrition · 2023
    Article
  10. Oral Administration ofCirculation reports · 2022
    Article
  11. Article
  12. Anti-Inflammatory Activities ofMicroorganisms · 2021
    Article
  13. Frontiers in bioengineering and biotechnology · 2021
    Article
  14. Nutrients · 2020
    Article
  15. Article
  16. Genetic Engineering Strategies forFrontiers in bioengineering and biotechnology · 2020
    Review
  17. Bioproducts FromFrontiers in bioengineering and biotechnology · 2019
    Review
  18. 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

7 authors at 1 institution in 1 country.

Kengo SuzukiEuglena Co., Ltd., Shiba, Minato-ku, Tokyo, Japan.
Ayaka NakashimaEuglena Co., Ltd., Shiba, Minato-ku, Tokyo, Japan.
Masaharu IgarashiNew Drug Research Center, Inc., Toiso, Eniwa, Hokkaido, Japan.
Keita SaitoNew Drug Research Center, Inc., Toiso, Eniwa, Hokkaido, Japan.
Makoto KonnoNew Drug Research Center, Inc., Toiso, Eniwa, Hokkaido, Japan.
Noriyuki YamazakiNew Drug Research Center, Inc., Toiso, Eniwa, Hokkaido, Japan.
Hiroaki TakimotoKitasato University, School of Science, Department of Biosciences, Kitasato, Minami-ku, Sagamihara, Kanagawa, Japan.
Kitasato University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Euglena gracilis Z is a microorganism classified as a microalga and is used as a food or nutritional supplement. Paramylon, the carbohydrate storage substance of E. gracilis Z, is reported to affect the immunological system. This study evaluated the symptom-relieving effects of E. gracilis Z and paramylon in rheumatoid arthritis in a collagen-induced arthritis mouse model. The efficacy of both substances was assessed based on clinical arthritis signs, as well as cytokine (interleukin [IL]-17, IL-6, and interferon [IFN]-γ) levels in lymphoid tissues. Additionally, the knee joints were harvested and histopathologically examined. The results showed that both substances reduced the transitional changes in the visual assessment score of arthritis symptoms compared with those in the control group, indicating their symptom-relieving effects on rheumatoid arthritis. Furthermore, E. gracilis Z and paramylon significantly reduced the secretion of the cytokines, IL-17, IL-6, and IFN-γ. The histopathological examination of the control group revealed edema, inflammation, cell hyperplasia, granulation tissue formation, fibrosis, and exudate in the synovial membrane, as well as pannus formation and articular cartilage destruction in the femoral trochlear groove. These changes were suppressed in both treatment groups. Particularly, the E. gracilis Z group showed no edema, inflammation, and fibrosis of the synovial membrane, or pannus formation and destruction of articular cartilage in the femoral trochlear groove. Furthermore, E. gracilis Z and paramylon exhibited symptom-relieving effects on rheumatoid arthritis and suppressed the secretion of cytokines IL-17, IL-6, and IFN-γ. These effects were likely mediated by the regulatory activities of E. gracilis Z and paramylon on Th17 immunity. In addition, the symptom-relieving effects of both substances were comparable, which suggests that paramylon is the active component of Euglena gracilis Z.

Indexed as

Carbohydrate MetabolismAnimalsArthritis, RheumatoidCytokinesEuglena gracilisImmunoglobulin GMaleMiceMice, Inbred DBATh17 CellsCytokinesImmunoglobulin G

Identifiers

PMID29389956
PMCPMC5794092
OpenAlexW2790503013

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.