Johannes B van Goudoever

• MD PhD
• Head of Department at Amsterdam University Medical Center

This technical review, one of the five developed by the European Society for Paediatric Gastroenterology Hepatology and Nutrition (ESPGHAN) Special Interest Group on Gut Microbiota and Modifications (SIG‐GMM), supports the preparation of a paper on the use of biotic‐supplemented formulas, including those containing probiotics. The SIG‐GMM conducted...

Objectives Long‐term neurodevelopment of moderate and late preterm infants (MLPTI; gestational age [GA] 32 0/7 weeks to 36 6/7 weeks) is at a lower level than that of those at term age. Increased protein and energy intakes in the first week of life have been associated with better neurodevelopment early in life, in very preterm infants. This study...

Hair cortisol concentration is a retrospective, long-term measure of cortisol secretion, often used as a biomarker for chronic stress or suspected cyclic Cushing’s syndrome. Various methods for hair cortisol extraction, typically involving intact, minced, or milled hair incubated with methanol or extraction buffers, may not achieve complete extract...

Importance The appropriate time for initiating complementary feeding in preterm infants is crucial for optimizing growth and preventing long-term health issues, such as overweight. Currently, there are no established guidelines for preterm infants. Objective To investigate the effect of initiating complementary feeding at corrected age 12 weeks vs...

Newborns are born with an immature immune system, making them susceptible to infections early in life. Human milk provides essential nutrients and immunological factors that support infant immunity. Maternal vaccination during lactation has the potential to enhance these benefits by triggering an immune response in the mother, potentially extending...

This technical review—one of five developed by the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN) Special Interest Group on Gut Microbiota and Modifications (SIG‐GMM)—supports the preparation of a position paper on the use of biotic‐ and synbiotic‐supplemented infant formulas. This paper also presents the state...

Objective Human milk composition is dynamic. While extensive research has focused on its macronutrient concentrations during the first 6 months of lactation, limited research exists for extended lactation periods. This study aims to examine the nutritional composition of human milk during these longer lactation phases. Design A retrospective longi...

Purpose of review This review aims to evaluate the latest available evidence on the differences between human milk proteins versus infant formula proteins and its effects on growth and development in preterm infants. Recent findings High protein intake supports initial growth in preterm infants, although the long-term benefits remain unclear. Huma...

Background: To determine the prevalence of pediatric Post-COVID-19 condition (PPCC), identify risk factors, and assess the quality of life in children with differing severities of acute COVID-19. Methods: During a prospective longitudinal study with a 1-year follow-up, we compared non-hospitalized (mild) and hospitalized (severe) COVID-19 cases...

Amino acids (AA) are essential nutrients in human milk (HM) and critical for infant growth and development. Several maternal lifestyle factors have been suggested to influence HM AA composition, with possible consequences for the breastfed infant. Whether maternal dietary protein and AA intake is associated with AA concentrations in HM is still lar...

Objective The fecal microbiota and metabolome are hypothesized to be altered before late-onset neonatal meningitis (LOM), in analogy to late-onset sepsis (LOS). The present study aimed to identify fecal microbiota composition and volatile metabolomics preceding LOM. Methods Cases and gestational age-matched controls were selected from a prospectiv...

Background and aim: Moderate and late preterm infants (MLPTI) (gestational age 32 0/7-36 6/7 weeks), are at risk for suboptimal growth. This study evaluated adherence to nutritional recommendations until 6 months corrected age (CA), growth until 2 years CA, and associations between nutritional intake and growth until 2 years CA. Methods: We pros...

Background Pediatric post coronavirus disease 2019 (COVID-19) condition (PPCC) is a heterogeneous syndrome, which can significantly affect the daily lives of children. This study aimed to identify clinically meaningful phenotypes in children with PPCC, to better characterize and treat this condition. Methods Participants were children with physici...

Aim To explore parents' perspectives regarding participation in neonatal care, with focus on the family integrated care (FICare) model utilised as a tool to enhance parent–infant closeness. Additionally, we describe experiences in different architectural settings. Methods An online survey, categorised by four FICare pillars, was distributed throug...

Introduction Upon vaccination against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) humans will start to produce antibodies targeting virus specific antigens that will end up in circulation. In lactating women such antibodies will also end up in breastmilk, primarily in the form of secretory immunoglobulin A1 (SIgA1), the most abunda...

Immunoglobulin M (IgM) is an evolutionary conserved key component of humoral immunity, and the first antibody isotype to emerge during an immune response. IgM is a large (1 MDa), multimeric protein, for which both hexameric and pentameric structures have been described, the latter additionally containing a joining (J) chain. Using a combination of...

Background Maternal stress in the postpartum period affects not only the mother but also her newborn child, who is at increased risk of developing metabolic and mental disorders later in life. The mechanisms by which stress is transmitted to the infant are not yet fully understood. Human milk (HM) is a potential candidate as maternal stress affects...

Parents are often appointed a passive role in the care for their hospitalised child. In the family-integrated care (FICare) model, parental involvement in neonatal care is emulated. Parental participation in medical rounds, or family-centred rounds (FCR), forms a key element. A paucity remains of randomised trials assessing the outcomes of FCR (emb...

Background The maternal diet greatly influences the nutritional composition of human milk. With the rise of vegan diets by lactating mothers, there are concerns about the nutritional adequacy of their milk. Two important nutrients, vitamin B2 and carnitine, are mostly ingested via animal products. Objective We investigated the influence of a vegan...

Background: Moderate exercise results in a significant increase in serum and salivary immunoglobulins. Maternal physical activity might therefore also be a factor influencing antibody levels in human milk. This study aims to determine the influence of physical activity on SARS-CoV-2-specific Immunoglobulin A (IgA) in human milk and Immunoglobulin...

Background: Assessing Quality of Life (QoL) of persons with profound intellectual and multiple disabilities (PIMD) is challenging, yet QoL plays an important role in medical decision-making processes concerning persons with PIMD. The perspectives of parents of children with PIMD on the assessment of their QoL have not been studied. Aim: To explo...

Immunoglobulin M (IgM) is an evolutionary conserved key component of humoral immunity, and the first antibody isotype to emerge during an immune response. IgM is a large (1 MDa), multimeric protein, for which both hexameric and pentameric structures have been described, the latter additionally containing a joining (J) chain. Using a combination of...

Objectives: Preventative measures against Coronavirus Disease 2019 (COVID-19) are essential for pregnant women; they are particularly vulnerable to emerging infectious pathogens due to alterations in their physiology. We aimed to determine the optimum timing of vaccination to protect pregnant women and their neonates from COVID-19. Methods: A pr...

Early detection of late-onset sepsis (LOS) in preterm infants is crucial since timely treatment initiation is a key prognostic factor. We hypothesized that fecal volatile organic compounds (VOCs), reflecting microbiota composition and function, could serve as a non-invasive biomarker for preclinical pathogen-specific LOS detection. Fecal samples an...

Human milk contains SARS-CoV-2-specific antibodies after COVID-19 vaccination. These milk antibodies decrease several months post-vaccination. Whether booster immunization restores human milk antibody levels, potentially offering prolonged passive immunity for the infant, remains unknown. In this prospective follow-up study, we investigated the lon...

Gastrointestinal infections are a major cause for serious clinical complications in infants. The induction of antibody responses by B cells is critical for protective immunity against infections and requires CXCR5+PD-1++ CD4+ T cells (TFH cells). We investigated the ontogeny of CXCR5+PD-1++ CD4+ T cells in human intestines. While CXCR5+PD-1++ CD4+...

Human milk is important for antimicrobial defense in infants and has well demonstrated antiviral activity. We evaluated the protective ability of human milk against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in a human fetal intestinal cell culture model. We found that, in this model, human milk blocks SARS-CoV-2 replica...

The most abundant immunoglobulin present in the human body is IgA. It has the highest concentrations at the mucosal lining and in biofluids such as milk and is the second most abundant class of antibodies in serum. We assessed the structural diversity and clonal repertoire of IgA1-containing molecular assemblies longitudinally in human serum and mi...

Objectives: To review the current literature and develop consensus conclusions and recommendations on nutrient intakes and nutritional practice in preterm infants with birthweight <1800 g. Methods: The European Society of Pediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) Committee of Nutrition (CoN) led a process that included CoN m...

Objective Iron deficiency (ID) and iron deficiency anemia (IDA) in early life are associated with adverse effects. Preterm infants are at risk for developing ID(A). Considering that not every preterm infant develops ID(A) and the potential risk of iron overload, indiscriminate iron supplementation in late preterm infants is debatable. This study ai...

Background: Probiotics, defined as live microorganisms that, when administered in adequate amounts, confer a health benefit on the host, are widely used despite uncertainty regarding their efficacy and discordant recommendations about their use. The ESPGHAN Special Interest Group on Gut Microbiota and Modifications provides updated recommendations...

Background & Aims Maternal stress in the postpartum period affects not only the mother, but also her newborn child who is at increased risk for a wide range of disorders later in life. The mechanisms underlying transmission of maternal stress to the child remain elusive. Human milk (HM) is a potential candidate and is an important source of fatty a...

Importance: Parent-infant closeness and active parent participation in neonatal care are important for parent and infant health. Objective: To give an overview of current neonatal settings and gain an in-depth understanding of facilitators and barriers to parent-infant closeness, zero-separation, in 19 countries. Methods: Neonatal intensive ca...

Importance SARS-CoV-2-specific antibodies in human milk might protect the breastfed infant against COVID-19. One of the factors that may influence human milk antibodies is psychological stress, which is suggested to be increased in lactating women during the COVID-19 pandemic. Objective To determine whether psychological stress is increased in lac...

Infant formulas have been designed to mimic human milk for infants who cannot be breastfed. The overall goal is to establish similar functional outcomes to assure optimal growth, development, maturation of the immune system, and programming of the metabolic system. However, after decades of improving infant formula, growth patterns and body composi...

Passive immunity derived from antibodies in human milk is important for protecting young infants against invading viruses. During the COVID-19 pandemic, circulation of common respiratory viruses was virtually absent due to preventative measures.

Background SARS-CoV-2-specific antibodies are secreted into human milk after women are vaccinated against COVID-19, which might protect the breastfed infant. Due to several reports of severe side-effects of the Oxford-AstraZeneca ChAdOx1 (AZD1222) vaccine against COVID-19, some lactating women followed a heterologous vaccination schedule consisting...

Stress exposure during sensitive developmental periods lastingly affects brain function and cognition and increases vulnerability to psychopathology later in life, as established in various preclinical and clinical studies. Interestingly, similar patterns are seen in children who suffer from perinatal malnutrition. Stress and malnutrition can act c...

Mother's own milk is universally recognized as the optimal source of nutrition for preterm infants, although most authorities agree a multi-nutrient fortifier must be added in order to support nutrient accretion at a rate comparable to in utero. Nevertheless, many preterm infants face a gap between achieved growth and what could have been achieved...

Purpose There is a growing number of children with medical complexity (CMC). After hospitalization, care often has to be continued at home, making transitional care very important. However, many parents do not feel empowered in their role as caregiver for the child. To move forward in this field, we explored prognostic factors associated with paren...

The COVID-19 pandemic has impacted breastfeeding and lactation globally, with clinical practices implemented early in the pandemic being mostly anti-breastfeeding, e.g., separation of mothers from their infants, and not evidence based. As the pandemic has progressed, evidence has emerged reconfirming the value of human milk and the importance of pr...

Anelloviruses (AVs) are found in the vast majority of the human population and are most probably part of a healthy virome. These viruses infect humans in the early stage of life, however, the characteristics of the first colonizing AVs are still unknown. We screened a collection of 107 blood samples from children between 0.4 and 64.8 months of age...

The most abundant immunoglobulin present in the human body is IgA1. It has the highest concentrations at the mucosal lining and in biofluids such as milk and is the second most abundant class of antibodies in serum. We assessed the structural diversity and clonal repertoire of IgA1-containing molecular assemblies longitudinally in human serum and m...

Background Vaccination of lactating women against COVID-19 may protect not only themselves but also their breastfed infant through human milk. Therefore, it is important to gain insight into the human milk antibody response after immunization with the various vaccines that are currently widely used. The aim of this study is to determine and compare...

Human milk is a highly complex liquid food tailor-made to match an infant's needs. Beyond documented positive effects of breastfeeding on infant and maternal health, there is increasing evidence that milk constituents also impact child neurodevelopment. Non-nutrient milk bioactives would contribute to the (long-term) development of child cognition...

Importance: Active participation in care by parents and zero separation between parents and their newborns is highly recommended during infant hospitalization in the neonatal intensive care unit (NICU). Objective: To study the association of a family integrated care (FICare) model with maternal mental health at hospital discharge of their preter...

Holder pasteurization (HoP) is the current recommended treatment for donor human milk. Although this method inactivates microbial contaminants, it also negatively affects various milk components. High-pressure processing (HPP, 400, 500, and 600 MPa), ultraviolet-C irradiation (UV-C, 2,430, 3,645, and 4,863 J/L) and thermoultrasonication (TUS, 1,080...

This study aims to compare the antibody response in human milk after vaccination with mRNA-based and vector-based vaccines.

Importance: Feeding intolerance is a common condition among preterm infants owing to immaturity of the gastrointestinal tract. Enteral insulin appears to promote intestinal maturation. The insulin concentration in human milk declines rapidly post partum and insulin is absent in formula; therefore, recombinant human (rh) insulin for enteral adminis...

The Alpha-1-Antitrypsin (A1AT) protein is an important protease inhibitor highly abundant in human serum and other body fluids. Additional to functioning as a protease inhibitor, A1AT is an important acute phase protein. Here, we set out to compare the proteoform profiles of A1AT purified from the human serum and milk of eight healthy donors to det...

Background In complex critical neonatal and paediatric clinical practice, little is known about long-term patient outcomes and what follow-up care is most valuable for patients. Emma Children’s Hospital, Amsterdam UMC (Netherlands), implemented a follow-up programme called Follow Me for neonatal and paediatric patient groups, to gain more insight i...

Human milk is a dynamic biofluid, and its detailed composition receives increasing attention. While most studies focus on changes over time or differences between maternal characteristics, interindividual variation receives little attention. Nevertheless, a comprehensive insight into this can help interpret human milk studies and help human milk ba...

Donor human milk is the first alternative for preterm infants when mother's own milk is not available. Most available human milk banking guidelines recommend classical holder pasteurization to ensure safety by eliminating potential infectious microorganisms. Processing by heat treatment, however, negatively affects functionality and availability of...

Donor human milk is generally processed by holder pasteurization (HoP) at 62. 5 • C for 30 min. This temperature-time combination is sufficient for eliminating pathogens in donor milk, but also negatively affects several bioactive milk components. Long heating up times may further affect the bioactive properties of pasteurized milk. High-Temperatur...

Introduction The KLIK Patient Reported Outcome Measures (PROM) portal (www.hetklikt.nu) has been implemented since 2011 in clinical practice in over 20 Dutch hospitals. Patients and/or parents complete PROMs before the outpatient consultation and answers are subsequently discussed by clinicians during consultation. This study aims to provide insigh...

The number of infants who are born (extremely) preterm and survive into adulthood is still increasing. Therefore, long-term consequences of preterm birth and possibilities to positively influence outcomes increasingly gain attention. Early nutrition and growth are thought to be important contributors in determining long-term health, especially with...

SARS-CoV-2-specific antibodies are secreted into human milk of infected or vaccinated lactating women and might provide protection to the breastfed infant against COVID-19. Differences in antibody response after these types of exposure are unknown. In this longitudinal cohort study, we compared the antibody response in human milk following SARS-CoV...

PurposeSince 2011, the evidence-based KLIK Patient Reported Outcome Measure (PROM) portal has been implemented in clinical practice in > 20 Dutch hospitals. Patients and/or parents complete PROMs on Health Related Quality of Life, symptoms and psychosocial functioning before their outpatient consultation. Answers are converted into an ePROfile and...

Objective To determine the effects of lower (≤0.3) versus higher (≥0.6) initial fractional inspired oxygen (FiO 2 ) for resuscitation on death and/or neurodevelopmental impairment (NDI) in infants <32 weeks’ gestation. Design Meta-analysis of individual patient data from three randomised controlled trials. Setting Neonatal intensive care units....

High rates of oxidative stress are common in preterm born infants and have short- and long-term consequences. The antioxidant properties of human milk limits the consequences of excessive oxidative damage. However, as the mother’s own milk it is not always available, donor milk may be provided as the best alternative. Donor milk needs to be pasteur...

Introduction: Primary hyperoxaluria type 1 (PH1) is an inborn error of glyoxylate metabolism characterized by increased endogenous oxalate production. The metabolic pathways underlying oxalate synthesis have not been fully elucidated and upcoming therapies require more reliable outcome parameters than currently used plasma oxalate levels and urina...

Zinc deficiency (ZnD) has adverse health consequences such as stunted growth. Since young children have an increased risk of developing ZnD, it is important to determine its prevalence and associated factors in this population. However, only a few studies have reported on ZnD prevalence in young children from Western high-income countries. This stu...

Holder pasteurization is the current recommended method for donor human milk treatment. This method effectively eliminates most life-threatening contaminants in donor milk, but it also greatly reduces some of its biological properties. Consequently, there is a growing interest for developing novel processing methods that can ensure both microbial i...

Parenteral nutrition is used to treat children that cannot be fully fed by the enteral route. While the revised ESPGHAN/ESPEN/ESPR/CSPEN pediatric parenteral nutrition guidelines provide clear guidance on the use of parenteral nutrition in neonates, infants, and children based on current available evidence, they have helped to crystallize areas whe...

Background The Sexual Knowledge Picture Instrument (SKPI) is a child-friendly picture book that was developed as a diagnostic tool for sexual abuse in young children and is currently being validated. The aim of the current study was to explore the verbal and non-verbal reactions of non-abused Dutch children, aged 3–9 years, to the SKPI and to asses...

Background & aims Donor human milk (DHM) is recommended as the first alternative for preterm infants if their mother’s own milk is not available or if the quantity is not sufficient. The most commonly used technique to eliminate microbial contaminants in DHM is holder pasteurization (HoP). However, the heating process during HoP partially destroys...

Background Provision of donor human milk is handled by established human milk banks that implement all required measures to ensure its safety and quality. Detailed human milk banking guidelines on a European level are currently lacking, while the information available on the actual practices followed by the European human milk banks, remains limite...

Based on the United Nations Conventions on the Rights of the Child (CRC), it is a child’s right to participate in all matters concerning its wellbeing. Little is known about chronically and/or critically ill children’s participation in pediatric shared decision-making (SDM). We explored medical literature to see if and how these children participat...

Background Human milk contains antibodies against Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) following Coronavirus Disease 2019 (COVID-19). These antibodies may serve as protection against COVID-19 in infants. However, the evolution of these human milk antibodies over time is unclear. Research Aim To elucidate the evolution of im...

Background objectives: Human milk (HM) is better tolerated than formula in preterm infants. Insulin, which is naturally present in HM but not in formula, has been suggested as a key factor for feeding tolerance, as it appears to stimulate intestinal maturation. Its precise concentrations during the early postnatal period, however, remains unknown....

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines are being administered around the world; however, lactating women were excluded from SARS-CoV-2 vaccine trials. Therefore, knowledge about the effect of vaccination in this specific group is limited. This information is essential to empower lactating women to make a we...