Evidence map›Paper›PMID 29567956›Full record

Trial reportScientific reports2018

The molecular mechanism for activating IgA production by Pediococcus acidilactici K15 and the clinical impact in a randomized trial.

Tadaomi Kawashima, Naho Ikari, Tomoko Kouchi, Yasuyuki Kowatari, Yoshiro Kubota, Naoki Shimojo, Noriko M Tsuji

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing 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

49 citing papers in PubMed.

  1. Trial
  2. Trial
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  5. Article
  6. Review
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  9. Review
  10. Royal jelly fermented byBiochemistry and biophysics reports · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Cancers · 2024
    Article
  16. Article
  17. Review
  18. Article
  19. Review
  20. Natural Ingredients to Improve Immunity.Pharmaceuticals (Basel, Switzerland) · 2023
    Review
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.

Tadaomi KawashimaResearch and Development Division, Kikkoman Corporation, Chiba, Japan. takawashima@mail.kikkoman.co.jp.
Naho IkariResearch and Development Division, Kikkoman Corporation, Chiba, Japan.
Tomoko KouchiResearch and Development Division, Kikkoman Corporation, Chiba, Japan.
Yasuyuki KowatariUeno Clinic, Aisei Hospital, Tokyo, Japan.
Yoshiro KubotaKikkoman General Hospital, Kikkoman Corporation, Chiba, Japan.
Naoki ShimojoDepartment of Pediatrics, Graduate School of Medicine, Chiba University, Chiba, Japan.
Noriko M TsujiBiomedical Research Institute, National Institute for Advanced Industrial Science and Technology (AIST), Tsukuba, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

IgA secretion at mucosal sites is important for host defence against pathogens as well as maintaining the symbiosis with microorganisms present in the small intestine that affect IgA production. In the present study, we tested the ability of 5 strains of lactic acid bacteria stimulating IgA production, being Pediococcus acidilactici K15 selected as the most effective on inducing this protective immunoglobulin. We found that this response was mainly induced via IL-10, as efficiently as IL-6, secreted by K15-stimulated dendritic cells. Furthermore, bacterial RNA was largely responsible for the induction of these cytokines; double-stranded RNA was a major causative molecule for IL-6 production whereas single-stranded RNA was critical factor for IL-10 production. In a randomized, double-blind, placebo-controlled clinical trial, ingestion of K15 significantly increased the secretory IgA (sIgA) concentration in saliva compared with the basal level observed before this intervention. These results indicate that functional lactic acid bacteria induce IL-6 and IL-10 production by dendritic cells, which contribute to upregulating the sIgA concentration at mucosal sites in humans.

Indexed as

AdultAnimalsDendritic CellsFemaleGastric MucosaHumansImmunoglobulin A, SecretoryInterleukin-10Interleukin-6Intestine, SmallLactobacillalesMaleMiddle AgedPediococcus acidilacticiRNA, BacterialRNA, Double-StrandedImmunoglobulin A, SecretoryInterleukin-10Interleukin-6RNA, BacterialRNA, Double-Stranded

Identifiers

PMID29567956
PMCPMC5864838

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.