Influence of Breastfeeding Factors on Polyamine Content in Human Milk

The polyamine content of human breast milk, which is the first exogenous source of polyamines for the newborn, can be affected by several factors associated with the mother, the infant, or breastfeeding itself. The aim of this study was to evaluate the influence of different breastfeeding factors on the polyamines found in human milk. For this study, a cohort of 83 mothers was considered for up to 4 months, and a subgroup of 33 mothers were followed during the first six months of breastfeeding. Two breast milk samples were collected at each sampling point (foremilk and hindmilk) and the polyamine content was determined by UHPLC-FL. Polyamine levels varied considerably between the mothers and tended to decrease over time. Putrescine was the minor polyamine, whereas spermidine and spermine contents were very similar. The concentrations of the three polyamines were significantly higher in hindmilk than foremilk (p < 0.001). Spermidine and spermine levels decreased significantly through the lactation progress (p < 0.05). Finally, slightly higher levels of polyamines were observed in the milk of mothers providing partial, rather than full, breastfeeding, although the differences were not significant. The polyamine content in human milk was found to change during a single feed (foremilk versus hindmilk) and as lactation progressed, mainly in response to the specific circumstances of the newborn.

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Human Breast Milk Contains Bovine lgG. Relationship to Infant Colic?

PEDIATRICS ◽

10.1542/peds.87.4.439 ◽

1991 ◽

Vol 87 (4) ◽

pp. 439-444

Author(s):

Patrick S. Clyne ◽

Anthony Kulczycki

Keyword(s):

Breast Milk ◽

Human Milk ◽

Milk Protein ◽

Cow’S Milk ◽

Human Breast Milk ◽

Human Breast ◽

Cow's Milk ◽

Milk Samples ◽

Infant Colic ◽

Β Lactoglobulin

Previous studies have suggested that an unidentified cow's milk protein, other than β-lactoglobulin and casein, might play a pathogenetic role in infant colic. Therefore, a radioimmunoassay was used to analyze human breast milk and infant formula samples for the presence of bovine IgG. Milk samples from 88 of the 97 mothers tested contained greater than 0.1 µg/mL of bovine IgG. In a study group of 59 mothers with infants in the colic-prone 2- to 17-week age group, the 29 mothers of colicky infants had higher levels of bovine IgG in their breast milk (median 0.42 µg/mL) than the 30 mothers of noncolicky infants (median 0.32 µg/mL) (P < .02). The highest concentrations of bovine IgG observed in human milk were 8.5 and 8.2 µg/mL. Most cow's milk-based infant formulas contained 0.6 to 6.4 µg/mL of bovine IgG, a concentration comparable with levels found in many human milk samples. The results suggest that appreciable quantities of bovine IgG are commonly present in human milk, that significantly higher levels are present in milk from mothers of colicky infants, and that bovine IgG may possibly be involved in the pathogenesis of infant colic.

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COVID-19 mRNA vaccine is not detected in human milk

10.1101/2021.03.05.21252998 ◽

2021 ◽

Cited By ~ 1

Author(s):

Yarden Golan ◽

Mary Prahl ◽

Arianna Cassidy ◽

Christine Y. Lin ◽

Nadav Ahituv ◽

...

Keyword(s):

Clinical Trials ◽

High Risk ◽

Breast Milk ◽

Human Milk ◽

Human Breast Milk ◽

Human Breast ◽

Phase 3 ◽

Milk Samples

AbstractSeveral countries have recently approved the use of mRNA vaccines against COVID-19 under an emergency use authorization. However, no pregnant or lactating individuals were included in the Phase 3 clinical trials of these vaccines despite belonging to a group at high risk for severe complications of COVID-19 infection. We show here that the mRNA from anti-COVID BNT162b2 (Pfizer) and mRNA-1273 (Moderna) vaccines is not detected in human breast milk samples collected 4-48 hours post-vaccine. These results strengthen the recommendation of ABM and WHO that lactating individuals who receive the anti-COVID-19 mRNA-based vaccine should continue to breastfeed their infants uninterrupted.

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Characteristics of Human Breast Milk Based on Infant’s Gender

Journal of Basic and Applied Research in Biomedicine ◽

10.51152/jbarbiomed.v5i1.21 ◽

2019 ◽

Vol 5 (1) ◽

pp. 8-10

Author(s):

Moudah Alhindi ◽

Hadohum Musallam ◽

Esam Elhefian

Keyword(s):

Breast Milk ◽

Human Milk ◽

Physicochemical Properties ◽

Infant Formula ◽

Human Breast Milk ◽

Human Breast ◽

Milk Samples ◽

Complex Fluid ◽

Infant Sex ◽

Calcium And Magnesium

Human milk is a complex fluid, which contains a number of constituents such as fats, proteins and vitamins, in addition to other compounds. These nutrients are needed for infant protection against infections and diseases. This study was undertaken to evaluate some physicochemical properties and biochemical constituents content of human milk samples (based on the gender of the breast feeding infant). This includes acidity, density and viscosity, as well as lactose, protein, calcium and magnesium contents. Results showed that the highest value of viscosity as well as the highest percentages of protein and acidity were recorded for human breast milk for a boy (2.212 cP, 1.237% and 0.02% respectively) while close values for density and other biochemical contents were recorded for both types of samples. However, only the change in viscosity was found to be significant (p?0.05). Variations in some properties of human milk depending on the infant' sex could be of benefit for developing infant formula taking infant’s gender into consideration.

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Detection of SARS-CoV-2 in Human Breast Milk

10.1101/2020.04.28.20075523 ◽

2020 ◽

Cited By ~ 2

Author(s):

Rüdiger Groß ◽

Carina Conzelmann ◽

Janis A. Müller ◽

Steffen Stenger ◽

Karin Steinhart ◽

...

Keyword(s):

Breast Milk ◽

Human Milk ◽

Breast Feeding ◽

Human Population ◽

Close Contact ◽

Human Breast Milk ◽

Human Breast ◽

Milk Samples ◽

Respiratory Droplets

SARS-CoV-2 (CoV-2) is mainly transmitted in the human population during close contact and respiratory droplets. It is currently unclear, however, whether CoV-2 is shed into milk and may also be transmitted from infected mothers to newborns trough breast feeding. Two recent reviews on the topic (1,2) did not find evidence for CoV-2 in human milk. However, the number of breast milk samples analyzed so far is small and samples were taken only once from each mother (2).

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Variations in melatonin levels in preterm and term human breast milk during the first month after delivery

Scientific Reports ◽

10.1038/s41598-019-54530-2 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 5

Author(s):

Yishi Qin ◽

Weiyang Shi ◽

Jialu Zhuang ◽

Yu Liu ◽

Lili Tang ◽

...

Keyword(s):

Circadian Rhythm ◽

Breast Milk ◽

Subgroup Analysis ◽

Human Breast Milk ◽

Human Breast ◽

Dynamic Changes ◽

Melatonin Concentration ◽

Factors Associated ◽

Milk Samples ◽

Nursing Mothers

AbstractThe objectives of the present study were to examine the dynamic changes in breast milk melatonin throughout the course of lactation and to explore factors associated with changes in melatonin concentrations and rhythms in both preterm and term breast milk. Breast milk was collected sequentially at 03:00, 09:00, 15:00, and 21:00 in one day. Melatonin was analyzed in 392 breast milk samples from 98 healthy nursing mothers at 0 to 30 days postpartum. In both preterm and term breast milk, the melatonin concentration presented a circadian rhythm with the acrophase at around 03:00. Subgroup analysis showed the peak melatonin concentrations differed significantly across lactation stages, with the highest concentration in the colostrum, followed by transitional and mature breast milk. At 03:00, preterm breast milk had a higher concentration of melatonin than term breast milk in the colostrum (28.67 pg/mL vs. 25.31 pg/mL, p < 0.022), transitional breast milk (24.70 pg/mL vs. 22.55 pg/mL), and mature breast milk (22.37 pg/mL vs. 20.12 pg /mL). Further studies are warranted for their roles and significance on melatonin in breast milk in nutrition and metabolism of neonates.

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Polyamines in human breast milk for preterm and term infants

British Journal Of Nutrition ◽

10.1017/s0007114512005284 ◽

2013 ◽

Vol 110 (3) ◽

pp. 524-528 ◽

Cited By ~ 17

Author(s):

J. Plaza-Zamora ◽

M. Sabater-Molina ◽

M. Rodríguez-Palmero ◽

M. Rivero ◽

V. Bosch ◽

...

Keyword(s):

Breast Milk ◽

Human Milk ◽

Human Breast Milk ◽

Gut Development ◽

Human Breast ◽

Mature Milk ◽

Term Infants ◽

Milk Samples ◽

Preterm Babies ◽

Transition Milk

Maternal milk is the first source of exogenous polyamines for the newborn. Polyamines modulate gut maturation in neonates, but no studies are available on polyamine concentration in human milk of preterm babies, even though they could be important for their immature gut. The present study aimed to determine polyamine concentration in human breast milk of mothers with preterm or term infants during the first month of lactation. Human milk samples were obtained during the first month of lactation from twenty-seven mothers with preterm babies and twelve mothers with babies born at term. The polyamine concentration in human milk was quantified by HPLC. During the first month of lactation, the total polyamine concentration was significantly higher in preterm milk than in term milk samples (7590 (sd 4990) v. 4660 (sd 4830) nmol/l, respectively (P =0·034)), as well as individual polyamine concentrations. Polyamine concentration in mature milk for preterm babies was significantly higher than that in mature milk for babies at term, and a similar trend was observed in colostrum and transition human milk. The spermidine/spermine ratio was higher in transition milk in preterm v. term samples, while in mature milk, the ratio was significantly lower in preterm than in term babies. In conclusion, the polyamine concentration was significantly higher in human milk for preterm than for term infants. This and the different spermidine/spermine ratios could influence the gut development of premature babies.

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Excretion of Iohexol and Metrizoate in Human Breast Milk

Acta Radiologica ◽

10.1177/028418518702800505 ◽

1987 ◽

Vol 28 (5) ◽

pp. 523-526 ◽

Cited By ~ 15

Author(s):

S. T. Nielsen ◽

I. Matheson ◽

J. N. Rasmussen ◽

K. Skinnemoen ◽

E. Andrew ◽

...

Keyword(s):

Breast Milk ◽

Low Dose ◽

Decay Curve ◽

Human Breast Milk ◽

Human Breast ◽

Blood Samples ◽

Lactating Women ◽

Milk Samples ◽

Slow Decay ◽

Contrast Medium Injection

Six lactating women undergoing contrast media examination had milk and blood taken to determine the rate and extent of excretion of iohexol (Omnipaque) (four mothers) and metrizoate (Isopaque) (two mothers). Blood samples were taken up to 45 minutes and milk samples up to 48 hours after the contrast medium injection. The excretion was low, reaching a maximum at 3 to 6 hours and showing a slow decay curve (t 1/2 = 15 to 108 hours). One mother, who was weaning her baby, showed a different excretion pattern. The amount excreted during 24 hours was about 0.5 per cent of the weight adjusted maternal dose for both iohexol and metrizoate. It is not likely, that such a low dose of poorly absorbed drug would cause any adverse effects in the infant, unless it is hypersensitive to the drug already. The authors consider breast feeding to be acceptable for mothers receiving iohexol or metrizoate.

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Nano-HPLC-HRMS Analysis to Evaluate Leptin Level in Milk Samples: A Pilot Study

Applied Sciences ◽

10.3390/app10176135 ◽

2020 ◽

Vol 10 (17) ◽

pp. 6135

Author(s):

Federica Dal Bello ◽

Enrica Mecarelli ◽

Daniela Gastaldi ◽

Francesco Savino ◽

Claudio Medana

Keyword(s):

Pilot Study ◽

Breast Milk ◽

Infant Formula ◽

Analytical Method ◽

Critical Role ◽

Bovine Milk ◽

Human Breast Milk ◽

Human Breast ◽

Milk Samples ◽

Limit Of Quantitation

Leptin is a 16 kDa lipophilic protein hormone secreted by adipocytes and its most significant function is to inform the brain with negative feedback that regulates food intake. Recently the protein found in human breast milk was related to breast feeding and onset of obesity, and the evidence of a low probability to develop pediatric obesity in children fed with breast milk was also confirmed. Since leptin could have a critical role, its quantitation both in human breast, bovine milk and in infant formula products is interesting. For this reason, we developed an analytical method based on immunoaffinity purification followed by an analysis with nano-High Pressure Liquid Chromatography coupled with High Resolution Mass Spectrometry analyzer (nano-HPLC-HRMS) to identify and quantify leptin in milk samples and performed a pilot study using samples of human breast milk, bovine milk and infant formulas. With an obtained lower limit of quantitation (LLOQ) of 100 ng mL−1 we quantified leptin in human breast milk finding an average of 6.70 ng mL−1. Our results show that leptin was under LLOQ both in bovine milk and in infant formula products. In conclusion, the developed analytical method here described was suitable to quantify leptin in milk samples with a good sensitivity and selectivity, and without the use of radioactive reagents.

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Mycobiome Profiles in Breast Milk from Healthy Women Depend on Mode of Delivery, Geographic Location, and Interaction with Bacteria

Applied and Environmental Microbiology ◽

10.1128/aem.02994-18 ◽

2019 ◽

Vol 85 (9) ◽

Cited By ~ 23

Author(s):

Alba Boix-Amorós ◽

Fernando Puente-Sánchez ◽

Elloise du Toit ◽

Kaisa M. Linderborg ◽

Yumei Zhang ◽

...

Keyword(s):

Breast Milk ◽

Potential Role ◽

Mode Of Delivery ◽

Geographical Location ◽

Geographic Location ◽

Fungal Species ◽

Human Breast Milk ◽

Human Breast ◽

Its1 Region ◽

Milk Samples

ABSTRACTRecent studies report the presence of fungal species in breast milk of healthy mothers, suggesting a potential role in infant mycobiome development. In the present work, we aimed to determine whether the healthy human breast milk mycobiota is influenced by geographical location and mode of delivery, as well as to investigate its interaction with bacterial profiles in the same samples. A total of 80 mature breast milk samples from 4 different countries were analyzed by Illumina sequencing of the internal transcribed spacer 1 (ITS1) region, joining the 18S and 5.8S regions of the fungal rRNA region. Basidiomycota and Ascomycota were found to be the dominant phyla, withMalasseziaandDavidiellabeing the most prevalent genera across countries. A core formed byMalassezia, Davidiella, Sistotrema, andPenicilliumwas shared in the milk samples from the different origins, although specific shifts in mycobiome composition were associated with geographic location and delivery mode. The presence of fungi in the breast milk samples was further confirmed by culture and isolate characterization, and fungal loads were estimated by quantitative PCR (qPCR) targeting the fungal ITS1 region. Cooccurrence network analysis of bacteria and fungi showed complex interactions that were influenced by geographical location, mode of delivery, maternal age, and pregestational body mass index. The presence of a breast milk mycobiome was confirmed in all samples analyzed, regardless of the geographic origin.IMPORTANCEDuring recent years, human breast milk has been documented as a potential source of bacteria for the newborn. Recently, we have reported the presence of fungi in breast milk from healthy mothers. It is well known that environmental and perinatal factors can affect milk bacteria; however, the impact on milk fungi is still unknown. The current report describes fungal communities (mycobiota) in breast milk samples across different geographic locations and the influence of the mode of delivery. We also provide novel insights on bacterium-fungus interactions, taking into account environmental and perinatal factors. We identified a core of four genera shared across locations, consisting ofMalassezia, Davidiella, Sistotrema, andPenicillium, which have been reported to be present in the infant gut. Our data confirm the presence of fungi in breast milk across continents and support the potential role of breast milk in the initial seeding of fungal species in the infant gut.

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Detectable Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in Human Breast Milk of a Mildly Symptomatic Patient With Coronavirus Disease 2019 (COVID-19)

Clinical Infectious Diseases ◽

10.1093/cid/ciaa673 ◽

2020 ◽

Cited By ~ 18

Author(s):

Patrick C K Tam ◽

Kathleen M Ly ◽

Max L Kernich ◽

Nicola Spurrier ◽

Diana Lawrence ◽

...

Keyword(s):

Case Report ◽

Breast Milk ◽

Severe Acute Respiratory Syndrome ◽

Human Milk ◽

Symptomatic Patient ◽

Clinical Samples ◽

Human Breast Milk ◽

Causative Pathogen ◽

Human Breast ◽

Novel Coronavirus

Abstract SARS-CoV-2 is a novel coronavirus and causative pathogen to the pandemic illness COVID-19. Although RNA has been detected in various clinical samples, no reports to date have documented SARS-CoV-2 in human milk. This case report describes an actively breastfeeding patient with COVID-19 infection with detectable viral RNA in human milk.

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