Evidence map›Paper›PMID 35344296›Full record

ArticleClinical and translational allergy2022

Immunoregulatory effects of Lactococcus lactis-derived extracellular vesicles in allergic asthma.

Dong-Hyun Lee, Han-Ki Park, Hee-Ra Lee, Hyeukjun Sohn, Soyoon Sim, Hyeon Ju Park, Yoo Seob Shin, Yoon-Keun Kim, Youngwoo Choi, Hae-Sim Park

Open access · goldAbstract read
In one paragraph

Article in Clinical and translational allergy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
4.6field-weighted citation impact, top 4% 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Journal of microbiology and biotechnology · 2025
    Pooled it
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  8. Microbial extracellular vesicles in the lung: friends in health, agents in disease.Extracellular vesicles and circulating nucleic acids · 2026
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  18. Harmonising cellular conversations: decoding the vital roles of extracellular vesicles in respiratory system intercellular communications.European respiratory review : an official journal of the European Respiratory Society · 2024
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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

10 authors at 3 institutions in 1 country.

Dong-Hyun LeeDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
Han-Ki ParkDepartment of Allergy and Clinical Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0002-5460-9917
Hee-Ra LeeMD Healthcare Inc., Seoul, Korea.
Hyeukjun SohnDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
Soyoon SimDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
Hyeon Ju ParkMD Healthcare Inc., Seoul, Korea.
Yoo Seob ShinDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
Yoon-Keun KimMD Healthcare Inc., Seoul, Korea.
Youngwoo ChoiDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
Hae-Sim ParkDepartment of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.ORCID https://orcid.org/0000-0003-2614-0303
Kyungpook National University · KRAjou University · KRSyneos Health (South Korea) · KR

Funding

Korea Health Industry Development Institute (KHIDI)Ministry of Education 2020R1I1A1A01073900Ministry of Health and Welfare, Republic of Korea HR16C0001
6 · The paper itself

Abstract

backgroundProbiotics have been shown to prevent various allergic diseases by producing extracellular vesicles (EVs). However, the role of EVs in allergic asthma has not yet been completely determined.

methodsGut microbial composition, mainly genera related to probiotics, was investigated in allergic asthmatic mice. Moreover, EVs were isolated from Lactococcus lactis (L. lactis, a selected bacterium) and EV proteins were identified by peptide mass fingerprinting. EV functions in immune responses were evaluated in vivo or ex vivo. Furthermore, the levels of specific IgG antibodies (an alternative marker for EV quantification) to L. lactis-EVs were measured by ELISA in the sera of 27 asthmatic patients and 26 healthy controls.

resultsAllergic asthmatic mice showed a lower proportion of Lactococcus compared to healthy mice. L. lactis was cultured and its EVs abundantly contained pyruvate kinase. When allergic asthmatic mice were intranasally treated with EVs, airway hyperresponsiveness, eosinophil number, cytokine secretion, and mucus production were significantly decreased. Moreover, L. lactis-EV treatment shifted immune responses from Th2 to Th1 by stimulating dendritic cells to produce IL-12. In addition, significantly lower levels of serum specific IgG4 (but not IgG1) to L. lactis-EVs were noted in asthmatic patients than in healthy controls. A positive correlation between the levels of EV-specific IgG4 and FEV

conclusionThese findings suggest that L. lactis-EVs may have immune-regulating effects on airway inflammation mediated by dendritic cell activation, providing a potential benefit for allergic asthma.

Indexed as

asthmaextracellular vesiclesLactococcus lactismicrobiotaprobiotics

Identifiers

PMID35344296
PMCPMC8967260
OpenAlexW4221019792

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.