Evidence map›Paper›PMID 33116172›Full record

ArticleScientific reports2020

Human milk microbiota in sub-acute lactational mastitis induces inflammation and undergoes changes in composition, diversity and load.

Alba Boix-Amorós, Maria Teresa Hernández-Aguilar, Alejandro Artacho, Maria Carmen Collado, Alex Mira

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
5.6field-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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

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  16. Microbiology spectrum · 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

5 authors at 4 institutions in 2 countries.

Alba Boix-AmorósDepartment of Biotechnology, Spanish National Research Council (IATA-CSIC), Institute of Agrochemistry and Food Technology, Paterna, Spain.
Maria Teresa Hernández-AguilarDr Peset Lactation Unit, National Health Service, Dr. Peset University Hospital, Valencia, Spain.
Alejandro ArtachoDepartment of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain.
Maria Carmen Collado *Department of Biotechnology, Spanish National Research Council (IATA-CSIC), Institute of Agrochemistry and Food Technology, Paterna, Spain.
Alex Mira *Department of Biotechnology, Spanish National Research Council (IATA-CSIC), Institute of Agrochemistry and Food Technology, Paterna, Spain. mira_ale@gva.es.
Instituto de Agroquímica y Tecnología de Alimentos · ESConsejo Superior de Investigaciones Científicas · ESFundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana · ESHospital Universitario Doctor Peset · ES

Funding

European Research Council 639226-MAMI
6 · The paper itself

Abstract

Sub-acute mastitis (SAM) is a prevalent disease among lactating women, being one of the main reasons for early weaning. Although the etiology and diagnosis of acute mastitis (AM) is well established, little is known about the underlying mechanisms causing SAM. We collected human milk samples from healthy and SAM-suffering mothers, during the course of mastitis and after symptoms disappeared. Total (DNA-based) and active (RNA-based) microbiota were analysed by 16S rRNA gene sequencing and qPCR. Furthermore, mammary epithelial cell lines were exposed to milk pellets, and levels of the pro-inflammatory interleukin IL8 were measured. Bacterial load was significantly higher in the mastitis samples and decreased after clinical symptoms disappeared. Bacterial diversity was lower in SAM milk samples, and differences in bacterial composition and activity were also found. Contrary to AM, the same bacterial species were found in samples from healthy and SAM mothers, although at different proportions, indicating a dysbiotic ecological shift. Finally, mammary epithelial cell exposure to SAM milk pellets showed an over-production of IL8. Our work therefore supports that SAM has a bacterial origin, with increased bacterial loads, reduced diversity and altered composition, which partly recovered after treatment, suggesting a polymicrobial and variable etiology.

Indexed as

BacteriaBreast FeedingFemaleHumansInflammationLactationMastitisMicrobiotaMilk, HumanRNA, Ribosomal, 16SRNA, Ribosomal, 16S

Identifiers

PMID33116172
PMCPMC7595153
OpenAlexW3094785664

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.