scholarly journals Breast milk urea as a nitrogen source for urease positive Bifidobacterium infantis

2021 ◽  
Vol 97 (3) ◽  
Author(s):  
Patrick Schimmel ◽  
Lennart Kleinjans ◽  
Roger S Bongers ◽  
Jan Knol ◽  
Clara Belzer
Keyword(s):  
Breast Milk ◽  
Human Milk ◽  
Synthetic Medium ◽  
Nitrogen Sources ◽  
Fold Increase ◽  
Protein Nitrogen ◽  
Breastfed Infants ◽  
Dietary Nitrogen ◽  
Health Promoting ◽  
Milk Urea

ABSTRACT Human milk stimulates a health-promoting gut microbiome in infants. However, it is unclear how the microbiota salvages and processes its required nitrogen from breast milk. Human milk nitrogen sources such as urea could contribute to the composition of this early life microbiome. Urea is abundant in human milk, representing a large part of the non-protein nitrogen (NPN). We found that B. longum subsp. infantis (ATCC17930) can use urea as a main source of nitrogen for growth in synthetic medium and enzyme activity was induced by the presence of urea in the medium. We furthermore confirmed the expression of both urease protein subunits and accessory proteins of B. longum subsp. infantis through proteomics. To the same end, metagenome data were mined for urease-related genes. It was found that the breastfed infant's microbiome possessed more urease-related genes than formula fed infants (51.4:22.1; 2.3-fold increase). Bifidobacteria provided a total of 106 of urease subunit alpha alignments, found only in breastfed infants. These experiments show how an important gut commensal that colonizes the infant intestine can metabolize urea. The results presented herein further indicate how dietary nitrogen can determine bacterial metabolism in the neonate gut and shape the overall microbiome.

scholarly journals Human Milk Oligosaccharides (HMOs) and Infant Microbiota: A Scoping Review

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1429
Author(s):  
Cristina Sánchez ◽  
Cristina Fente ◽  
Patricia Regal ◽  
Alexandre Lamas ◽  
María Paz Lorenzo
Keyword(s):  
Breast Milk ◽  
Human Milk ◽  
Mode Of Delivery ◽  
Geographic Location ◽  
Microbial Colonization ◽  
Human Milk Oligosaccharides ◽  
Maternal Factors ◽  
Milk Oligosaccharides ◽  
Breastfed Infants ◽  
The Impact

Human milk oligosaccharides (HMOs) are the third most abundant solid component of breast milk. However, the newborn cannot assimilate them as nutrients. They are recognized prebiotic agents (the first in the newborn diet) that stimulate the growth of beneficial microorganisms, mainly the genus Bifidobacterium, dominant in the gut of breastfed infants. The structures of the oligosaccharides vary mainly according to maternal genetics, but also other maternal factors such as parity and mode of delivery, age, diet, and nutritional status or even geographic location and seasonality cause different breast milk oligosaccharides profiles. Differences in the profiles of HMO have been linked to breast milk microbiota and gut microbial colonization of babies. Here, we provide a review of the scope of reports on associations between HMOs and the infant gut microbiota to assess the impact of HMO composition.

scholarly journals Acrylamide Content in Breast Milk: The Evaluation of the Impact of Breastfeeding Women’s Diet and the Estimation of the Exposure of Breastfed Infants to Acrylamide in Breast Milk

Toxics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 298
Author(s):  
Hanna Mojska ◽  
Iwona Gielecińska ◽  
Joanna Winiarek ◽  
Włodzimierz Sawicki
Keyword(s):  
Breast Milk ◽  
Human Milk ◽  
Maillard Reaction ◽  
Mature Milk ◽  
Dietary Recall ◽  
Breastfed Infants ◽  
Milk Samples ◽  
Dietary Acrylamide ◽  
The Impact ◽  
Carcinogenic Compound

Acrylamide in food is formed by the Maillard reaction. Numerous studies have shown that acrylamide is a neurotoxic and carcinogenic compound. The aim of this study was to determine the level of acrylamide in breast milk at different lactation stages and to evaluate the impact of breastfeeding women’s diet on the content of this compound in breast milk. The acrylamide level in breast milk samples was determined by LC–MS/MS. Breastfeeding women’s diet was evaluated based on the 24 h dietary recall. The median acrylamide level in colostrum (n = 47) was significantly (p < 0.0005) lower than in the mature milk (n = 26)—0.05 µg/L and 0.14 µg/L, respectively. The estimated breastfeeding women’s acrylamide intake from the hospital diet was significantly (p < 0.0001) lower than that from the home diet. We found positive—although modest and borderline significant—correlation between acrylamide intake by breastfeeding women from the hospital diet µg/day) and acrylamide level in the colostrum (µg/L). Acrylamide has been detected in human milk samples, and a positive correlation between dietary acrylamide intake by breastfeeding women and its content in breast milk was observed, which suggests that the concentration can be reduced. Breastfeeding women should avoid foods that may be a source of acrylamide in their diet.

scholarly journals Bacterial Diversity of Breast Milk in Healthy Spanish Women: Evolution from Birth to Five Years Postpartum

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2414
Author(s):  
Laura Sanjulián ◽  
Alexandre Lamas ◽  
Rocío Barreiro ◽  
Alberto Cepeda ◽  
Cristina A. Fente ◽  
...  
Keyword(s):  
Breast Milk ◽  
16S Rrna ◽  
Human Milk ◽  
Alpha Diversity ◽  
Amplicon Sequencing ◽  
Maternal Body Mass Index ◽  
16S Rrna Amplicon Sequencing ◽  
Spanish Women ◽  
Calcium Magnesium ◽  
Abundant Genus

The objective of this work was to characterize the microbiota of breast milk in healthy Spanish mothers and to investigate the effects of lactation time on its diversity. A total of ninety-nine human milk samples were collected from healthy Spanish women and were assessed by means of next-generation sequencing of 16S rRNA amplicons and by qPCR. Firmicutes was the most abundant phylum, followed by Bacteroidetes, Actinobacteria, and Proteobacteria. Accordingly, Streptococcus was the most abundant genus. Lactation time showed a strong influence in milk microbiota, positively correlating with Actinobacteria and Bacteroidetes, while Firmicutes was relatively constant over lactation. 16S rRNA amplicon sequencing showed that the highest alpha-diversity was found in samples of prolonged lactation, along with wider differences between individuals. As for milk nutrients, calcium, magnesium, and selenium levels were potentially associated with Streptococcus and Staphylococcus abundance. Additionally, Proteobacteria was positively correlated with docosahexaenoic acid (DHA) levels in breast milk, and Staphylococcus with conjugated linoleic acid. Conversely, Streptococcus and trans-palmitoleic acid showed a negative association. Other factors such as maternal body mass index or diet also showed an influence on the structure of these microbial communities. Overall, human milk in Spanish mothers appeared to be a complex niche shaped by host factors and by its own nutrients, increasing in diversity over time.

scholarly journals COVID-19 Vaccine mRNABNT162b2 Elicits Human Antibody Response in Milk of Breastfeeding Women

Vaccines ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 785
Author(s):  
Maurizio Guida ◽  
Daniela Terracciano ◽  
Michele Cennamo ◽  
Federica Aiello ◽  
Evelina La Civita ◽  
...  
Keyword(s):  
Breast Milk ◽  
Antibody Response ◽  
Human Milk ◽  
Human Antibody ◽  
Serum Antibodies ◽  
Serum Samples ◽  
Low Concentration ◽  
Milk Samples ◽  
Milk Antibodies ◽  
Roche Diagnostics

Objective: The objective of this research is to demonstrate the release of SARS-CoV-2 Spike (S) antibodies in human milk samples obtained by patients who have been vaccinated with mRNABNT162b2 vaccine. Methods: Milk and serum samples were collected in 10 volunteers 20 days after the first dose and 7 seven days after the second dose of the mRNABNT162b2 vaccine. Anti-SARS-CoV-2 S antibodies were measured by the Elecsys® Anti-SARS-CoV-2 S ECLIA assay (Roche Diagnostics AG, Rotkreuz, Switzerland), a quantitative electrochemiluminescence immunometric method. Results: At first sample, anti-SARS-CoV-2 S antibodies were detected in all serum samples (103.9 ± 54.9 U/mL) and only in two (40%) milk samples with a low concentration (1.2 ± 0.3 U/mL). At the second sample, collected 7 days after the second dose, anti-SARS-CoV-2 S antibodies were detected in all serum samples (3875.7 ± 3504.6 UI/mL) and in all milk samples (41.5 ± 47.5 UI/mL). No correlation was found between the level of serum and milk antibodies; the milk antibodies/serum antibodies ratio was on average 2% (range: 0.2–8.4%). Conclusion: We demonstrated a release of anti-SARS-CoV-2 S antibodies in the breast milk of women vaccinated with mRNABNT162b2. Vaccinating breastfeeding women could be a strategy to protect their infants from COVID-19 infection.

Determination of bisphenols and parabens in breast milk and dietary risk assessment for Polish breastfed infants

2021 ◽  
Vol 98 ◽  
pp. 103839
Author(s):  
Beata Czarczyńska-Goślińska ◽  
Tomasz Grześkowiak ◽  
Robert Frankowski ◽  
Janina Lulek ◽  
Jan Pieczak ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Breast Milk ◽  
Breastfed Infants ◽  
Dietary Risk ◽  
Dietary Risk Assessment

scholarly journals The Triad Mother-Breast Milk-Infant as Predictor of Future Health: A Narrative Review

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 486 ◽  
Author(s):  
Elvira Verduci ◽  
Maria Lorella Giannì ◽  
Giulia Vizzari ◽  
Sara Vizzuso ◽  
Jacopo Cerasani ◽  
...  
Keyword(s):  
Health Outcome ◽  
Breast Milk ◽  
Human Milk ◽  
Maternal Diet ◽  
Milk Composition ◽  
Narrative Review ◽  
Future Health ◽  
Interconnected System ◽  
Offspring Health ◽  
Diet And Lifestyle

The benefits of human milk for both mother and infant are widely acknowledged. Human milk could represent a link between maternal and offspring health. The triad mother-breast milk-infant is an interconnected system in which maternal diet and lifestyle might have effects on infant’s health outcome. This link could be in part explained by epigenetics, even if the underlining mechanisms have not been fully clarified yet. The aim of this paper is to update the association between maternal diet and human milk, pointing out how maternal diet and lifestyle could be associated with breast-milk composition, hence with offspring’s health outcome.

scholarly journals Human milk feeding and cognitive outcome in preterm infants: the role of infection and NEC reduction

2021 ◽  
Author(s):  
Winok Lapidaire ◽  
Alan Lucas ◽  
Jonathan D. Clayden ◽  
Chris Clark ◽  
Mary S. Fewtrell
Keyword(s):  
Breast Milk ◽  
Human Milk ◽  
Preterm Infants ◽  
Neonatal Infection ◽  
Necrotising Enterocolitis ◽  
Cognitive Outcome ◽  
Standard Diet ◽  
Risk Of Infection ◽  
Verbal Iq

Abstract Background Breast milk has been associated with lower risk of infection and necrotising enterocolitis (NEC) and improved long-term cognitive outcomes in preterm infants but, if unsupplemented, does not meet the nutritional requirements of preterm infants. Methods Preterm infants were randomised to receive a high nutrient intervention diet: preterm formula (PTF) or the standard diet: term formula (TF) or banked donor breast milk (BBM), either as their sole diet or as supplement to maternal breast milk (MBM). IQ tests were performed at ages 7, 15, 20, and 30 years. Results An increase in MBM and BBM intake was associated with a lower chance of neonatal infection/NEC. Neonatal infection/NEC was associated with lower Full Scale IQ (FSIQ) and Performance IQ (PIQ) score at ages 7 and 30 years. The relationship between higher intake of MBM and PIQ at age 7 years was partly mediated by neonatal infection/NEC. The intervention diet was associated with higher Verbal IQ (VIQ) scores compared to the standard diet. There was no evidence that these effects changed from childhood through to adulthood. Conclusions Neonatal diet is an important modifiable factor that can affect long-term cognitive outcome through a ‘human milk’ factor, protecting against infection/NEC, and a ‘nutrient content’ factor. Impact This is the first study to demonstrate the effects of neonatal infection/necrotising enterocolitis (NEC) on IQ in the same cohort in childhood and adulthood. Diet can be a key factor in long-term cognitive outcome in people born preterm by preventing neonatal infection/NEC and providing adequate nutrients. Human milk, whether MBM or BBM, is associated with a reduced risk of infection/NEC. A higher nutrient diet is associated with better cognitive outcome in childhood. Performance IQ is particularly vulnerable to the effects of infection/NEC and verbal IQ to the quantity of (macro)nutrients in the diet.

scholarly journals Immunoglobulin A antibodies directed againstCampylobacter jejuniflagellin present in breast–milk

1994 ◽  
Vol 112 (2) ◽  
pp. 359-365 ◽  
Author(s):  
I. Nachamkin ◽  
S. H. Fischer ◽  
X.-H. Yang ◽  
O. Benitez ◽  
A. Cravioto
Keyword(s):  
Breast Milk ◽  
Protective Effect ◽  
Statistical Significance ◽  
Immunoglobulin A ◽  
Specific Antibodies ◽  
Breastfed Infants ◽  
Milk Samples ◽  
The Difference ◽  
Campylobacter Infection ◽  
The Relationship

SUMMAYWe studied the relationship between IgA anti–campylobacter flagellin antibodies in breast milk samples and protection of breastfed infants living in a rural Mexican village from campylobacter infection. There were fewer episodes of campylobacter infection (symptomatic and asymptomatic combined) in infants breastfed with milk containing specific anti-flagellin antibodies (1.2/child/year, 95% CI 0.6–1.8) versus non–breastfed children (3.3/child/year, 95% CI 1.8–4.8; P < 0.01). Infants breastfed with milk that was antiflagellin antibody negative by ELISA also had fewer episodes of infection compared with non-breastfed children, but the difference did not reach statistical significance (1.8/child/year, 95% CI 0.7–3.0 versus 3.3/child/year, 95% CI 1.8–4.8, P > 0.05). Breastfeeding has a protective effect against campylobacter infection and is associated with the presence of specific antibodies directed against campylobacter flagellin.

scholarly journals Effects of human milk fortifier with iron on the bacteriostatic properties of breast milk

2013 ◽  
Vol 89 (4) ◽  
pp. 394-399
Author(s):  
Leticia Fuganti Campos ◽  
João Carlos Domingues Repka ◽  
Mário Cícero Falcão
Keyword(s):  
Breast Milk ◽  
Human Milk ◽  
Human Milk Fortifier
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