Evidence map›Paper›PMID 35229476›Full record

ArticleMicrobial biotechnology2022

Extracellular vesicle formation in Lactococcus lactis is stimulated by prophage-encoded holin-lysin system.

Yue Liu, Marcel H Tempelaars, Sjef Boeren, Svetlana Alexeeva, Eddy J Smid, Tjakko Abee

Open access · goldAbstract read
In one paragraph

Article in Microbial biotechnology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
6.4field-weighted citation impact, top 3% 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

35 citing papers in PubMed, 51 citations in OpenAlex.

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  9. Foods (Basel, Switzerland) · 2025
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  16. Bacterial Extracellular Vesicles (BEVs) Derived FromInternational journal of biomaterials · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Yue LiuFood Microbiology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700 AA, the Netherlands.ORCID 0000-0003-1579-6278
Marcel H TempelaarsFood Microbiology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700 AA, the Netherlands.
Sjef BoerenLaboratory of Biochemistry, Wageningen University and Research, Wageningen, the Netherlands.
Svetlana AlexeevaFood Microbiology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700 AA, the Netherlands.
Eddy J SmidFood Microbiology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700 AA, the Netherlands.ORCID 0000-0002-6687-5083
Tjakko AbeeFood Microbiology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700 AA, the Netherlands.ORCID 0000-0001-8811-9900
Wageningen University & Research · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gram-positive bacterial extracellular membrane vesicles (EVs) have been drawing more attention in recent years. However, mechanistic insights are still lacking on how EVs are released through the cell walls in Gram-positive bacteria. In this study, we characterized underlying mechanisms of EV production and provide evidence for a role of prophage activation in EV release using the Gram-positive bacterium Lactococcus lactis as a model. By applying a standard EV isolation procedure, we observed the presence of EVs in the culture supernatant of a lysogenic L. lactis strain FM-YL11, for which the prophage-inducing condition led to an over 10-fold increase in EV production in comparison with the non-inducing condition. In contrast, the prophage-encoded holin-lysin knockout mutant YL11ΔHLH and the prophage-cured mutant FM-YL12 produced constantly low levels of EVs. Under the prophage-inducing condition, FM-YL11 did not show massive cell lysis. Defective phage particles were found to be released in and associated with holin-lysin-induced EVs from FM-YL11, as demonstrated by transmission electron microscopic images, flow cytometry and proteomics analysis. Findings from this study further generalized the EV-producing phenotype to Gram-positive L. lactis, and provide additional insights into the EV production mechanism involving prophage-encoded holin-lysin system. The knowledge on bacterial EV production can be applied to all Gram-positive bacteria and other lactic acid bacteria with important roles in fermentations and probiotic formulations, to enable desired release and delivery of cellular components with nutritional values or probiotic effects.

Indexed as

BacteriophagesExtracellular VesiclesLactococcus lactisLysogenyProphages

Identifiers

PMID35229476
PMCPMC8966010
OpenAlexW4214674113

What OpenQuestion holds

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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.