Human Milk and Its Effect on Infant's Metabolism and Infant Gut Microbiome
- Conditions
- Human Milk MicrobiomeBreast Milk CollectionHuman Milk/BreastfeedingInfant Gut Microbiome
- Registration Number
- NCT05111990
- Lead Sponsor
- University of Aarhus
- Brief Summary
This protocol explains the MAINHEALTH cohort. The study examine the influence of maternal health parameters on human breast milk composition and integrates milk phenotype with infant metabolism and infant gut microbial content and metabolism.
- Detailed Description
The birth of a living human being is the result of an approximately nine-month pregnancy in which the developing foetus has taken exactly the building blocks necessary to grow and develop from its mother. However, growth and development continues in multiple dimensions at an increasing pace after birth. The nutrition in the first 1,000 days from conception to the child's 2nd birthday plays a pivotal role in shaping the future health of the child. Yet, little is known of how breast milk components vary due to maternal factors or of the biological mechanisms behind the beneficial actions of many breast milk nutrients. The investigators propose to overcome these obstacles by combining specialties to give a more complete account of what breast milk is (major and minor milk constituents and microbiota), how it affects the infants directly or indirectly through breast milk-gut microbiome interactions and by which mechanisms. In this study longitudinal samples from 200 mother-infant dyads during the first year of life across three groups of pregestational maternal BMI; normal weight (BMI 18.5-24.99), overweight (BMI 25-30), and obese (BMI \>30) are collected. The samples give a comprehensive record of what the infant has ingested (milk samples) and how the infant and infant gut microbiome responds to this (infant urine and feces). Maternal diet in pregnancy and at milk sample deliveries are recorded through a 24h online food recall and diary system. Maternal health attributes will, besides BMI, be analysed through clinical blood biochemistry parameters. Follow-up samples and infant dietary intake as the infant grows allow investigating how early life diet shaped infant growth and gut colonization more long term. The investigators have formed an experienced team of scientists within metabolomics, microbiology and medicine, holding leading positions within their respective fields in Denmark. The novelty in the study is the interdisciplinarity, unique study design and the emphasis to integrate a number of dynamic measurements thereby offering the ability to identify the factors in breast milk affecting infant metabolism and gut colonization. Knowing this enable the optimization of infant formula.
The research questions asked in this project are three-fold.
* First, the investigators want to determine the variability of breast milk nutrients by application of multi-omics (metabolomics, proteomics and glycomics). The production of human breast milk has a high maternal metabolic cost. Thus, hypothesis is that maternal health attributes (metabolic dysfunction or obesity) influence which breast milk nutrients are made available to the infant.
* Second, the investigators want to establish the microbiome of breast milk. Maternal obesity can lead to an apparent gut microbial ecology and increases the risk of obesity for the child. Thus, the hypothesis is that maternal obesity confers distinct microorganisms to the infant.
* Third, the investigators want to identify biological mechanisms for how breast milk nutrients are metabolised in the infants. Infants exclusively breast-feeding offer total compliance. Thus, the hypothesis is that by deconstructing breast milk components and markers of infant metabolism through comprehensive analysis of infant urine and feces, bioactivity of breast milk nutrients can be elucidated.
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- Female
- Target Recruitment
- 168
Not provided
Not provided
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Metabolite profile of human milk Birth to 3 months Human milk metabolites by Nuclear Magnetic Resonance (NMR) spectroscopy. Data will be analysed as absolute concentrations of milk metabolites; how milk metabolite profiles are related to mother's blood chemistry, milk microbial profiles, milk oligosaccharides, infant urine metabolome, and infant fecal microbiomes will be explored using multivariate analyses.
- Secondary Outcome Measures
Name Time Method Milk proteome profile Birth to 3 months Human milk proteome by LC-MS-based, bottom-up proteomics. Data will be analysed as relative abundances of milk proteins.
Milk protein post-translational modification (PTM) profile Birth to 3 months Post-translational modifications of human milk proteins is analysed by LC-MS-based and 2D- gel-based proteomics. Data will be analysed as relative abundances of milk protein PTMs.
Metabolite profile of infant fecal material Birth to 5 years of age Infant fecal metabolome by NMR-based metabolomics. Data will be analysed as absolute concentrations of fecal metabolites
Microbial structure of maternal vagina and rectum to investigate vertical transmission of bacteria to infant during birth During birth Vertical transmission of microbiome from mother to infant. Vaginal and rectal microbiome by nanopore sequencing. Data will be analysed as relative abundances of bacteria from phylum to genus levels.
Microbial structure of infant feces Birth to 5 years of age Infant fecal microbiome by nanopore sequencing. Data will be analysed as relative abundances of bacteria from phylum to genus levels.
Microbial structure of infant oral cavity 30 days postpartum Oral cavity microbiome by nanopore sequencing. Data will be analysed as relative abundances of bacteria from phylum to genus levels.
Metabolite profile of human milk by Liquid Chromatography-Mass Spectrometry (LC-MS) analysis Birth to 3 months Human milk metabolites by LC-MS-based metabolomics. Data will be analysed as absolute concentrations of milk metabolites; how milk metabolite profiles are related to milk microbial profiles, milk oligosaccharides, infant urine metabolome, and infant fecal microbiomes will be explored using multivariate analyses.
Milk glycome profile Birth to 3 months Human milk glycome by LC-MS-based glycomics. Data will be analysed as relative abundances of milk glycans.
Microbial structure of mother's skin microbiome 30 days postpartum Skin microbiome by nanopore sequencing. Data will be analysed as relative abundances of bacteria from phylum to genus levels.
Infant metabolism investigated by infant urine metabolomics Birth to 3 months of age Infant urine metabolome by NMR-based metabolomics. Data will be analysed as absolute concentrations of urine metabolites
Mother's 24-h dietary recall (myfood24) During pregnancy (Gestational age 30), 30, 60, and 90 days postpartum. In each case two times within a week (one weekday and one weekend day). Aggregated nutrient intake data (e.g. proteins, vitamins, fibers, omega-3-fatty acids)
Microbial structure of human milk Birth to 3 months Human milk microbiome by nanopore sequencing. Data will be analysed as relative abundances of bacteria from phylum to genus levels.
Trial Locations
- Locations (1)
Aarhus University
🇩🇰Aarhus, Denmark