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Babiszewska-Aksamit M, Żelaźniewicz A, Apanasewicz A, Piosek M, Winczowska P, Barbarska O, Ziomkiewicz A. Breast size in lactating women and the content of macronutrients in human milk. Am J Hum Biol 2024; 36:e24055. [PMID: 38420902 DOI: 10.1002/ajhb.24055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 02/08/2024] [Accepted: 02/12/2024] [Indexed: 03/02/2024] Open
Abstract
INTRODUCTION Although the primary function of a woman's breast is milk synthesis, only a few studies have evaluated the relationship between breast size and human milk composition, showing equivocal results. This study aims to test if breast size during fully established lactation is related to energy density and content of macronutrients in human milk. MATERIALS AND METHODS Mothers of healthy, born-on-term infants at stage III of lactogenesis (N = 137) provided breast milk samples. Milk composition was analyzed using midinfrared transmission spectroscopy. The breast size index was calculated by dividing the breast by the circumference below the breast. RESULTS Stepwise forward linear regression showed a negative association between breast size index and lactose concentration in breast milk (β = -.242, p = .003). The final model, which includes breast size index, feeding frequency, and maternal energy intake together explained around 13% of the variance in breast milk lactose content (R2 adj = .126, p < .001). No statistically significant relationship was found between breast size index and milk's energy density, protein, and fat content. CONCLUSION This is the first study that shows a negative relationship between breast size during fully established lactation and lactose concentration in milk in a large sample size. No relationship between other macronutrients and breast size indicates that large breast size is not necessary for adequate milk production; however, it may contribute to an altered lactose concentration.
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Affiliation(s)
- Magdalena Babiszewska-Aksamit
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of Sciences, Wroclaw, Poland
- Department of Medical Biology, Medical University of Warsaw, Warsaw, Poland
| | | | - Anna Apanasewicz
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of Sciences, Wroclaw, Poland
| | | | - Patrycja Winczowska
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of Sciences, Wroclaw, Poland
| | - Olga Barbarska
- School of Medical & Health Sciences, University of Economics and Human Sciences in Warsaw, Warsaw, Poland
| | - Anna Ziomkiewicz
- Laboratory of Anthropology, Jagiellonian University, Institute of Zoology and Biomedical Research, Poland
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Harries V, Abraham J, Vesi L, Reupena A, Faaselele-Savusa K, Duckham RL, Bribiescas R, Hawley N. The milk study protocol: A longitudinal, prospective cohort study of the relationship between human milk metabolic hormone concentration, maternal body composition, and early growth and satiety development in Samoan infants aged 1-4 months. PLoS One 2024; 19:e0292997. [PMID: 38728264 PMCID: PMC11086876 DOI: 10.1371/journal.pone.0292997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/03/2023] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Current research suggests that energy transfer through human milk influences infant nutritional development and initiates metabolic programming, influencing eating patterns into adulthood. To date, this research has predominantly been conducted among women in high income settings and/or among undernourished women. We will investigate the relationship between maternal body composition, metabolic hormones in human milk, and infant satiety to explore mechanisms of developmental satiety programming and implications for early infant growth and body composition in Samoans; a population at high risk and prevalence for overweight and obesity. Our aims are (1) to examine how maternal body composition influences metabolic hormone transfer from mother to infant through human milk, and (2) to examine the influences of maternal metabolic hormone transfer and infant feeding patterns on early infant growth and satiety. METHODS We will examine temporal changes in hormone transfers to infants through human milk in a prospective longitudinal cohort of n = 80 Samoan mother-infant dyads. Data will be collected at three time points (1, 3, & 4 months postpartum). At each study visit we will collect human milk and fingerpick blood samples from breastfeeding mother-infant dyads to measure the hormones leptin, ghrelin, and adiponectin. Additionally, we will obtain body composition measurements from the dyad, observe breastfeeding behavior, conduct semi-structured interviews, and use questionnaires to document infant hunger and feeding cues and satiety responsiveness. Descriptive statistics, univariate and multivariate analyses will be conducted to address each aim. DISCUSSION This research is designed to advance our understanding of variation in the developmental programming of satiety and implications for early infant growth and body composition. The use of a prospective longitudinal cohort alongside data collection that utilizes a mixed methods approach will allow us to capture a more accurate representation on both biological and cultural variables at play in a population at high risk of overweight and obesity.
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Affiliation(s)
- Victoria Harries
- Department of Anthropology, Yale University, New Haven, Connecticut, United States of America
| | - Jyothi Abraham
- School of Nursing, National University of Samoa, Apia, Samoa
| | - Lupesina Vesi
- Obesity, Lifestyle, and Genetic Adaptations Study Group, Apia, Samoa
| | - Aniva Reupena
- Obesity, Lifestyle, and Genetic Adaptations Study Group, Apia, Samoa
| | | | - Rachel L. Duckham
- Institute of Physical Activity and Nutrition, Deakin University, Geelong, Australia
- Australian Institute for Musculoskeletal Sciences, The University of Melbourne and Western Health, St Albans, Australia
| | - Richard Bribiescas
- Department of Anthropology, Yale University, New Haven, Connecticut, United States of America
| | - Nicola Hawley
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, Connecticut, United States of America
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Klaey-Tassone M, Soussignan R, Durand K, Roy SL, Damon F, Villière A, Fillonneau C, Prost C, Patris B, Sagot P, Schaal B. Testing detectability, attractivity, hedonic specificity, extractability, and robustness of colostrum odor-Toward an olfactory bioassay for human neonates. Dev Psychobiol 2024; 66:e22474. [PMID: 38419350 DOI: 10.1002/dev.22474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 01/18/2024] [Accepted: 02/04/2024] [Indexed: 03/02/2024]
Abstract
Human milk odor is attractive and appetitive for human newborns. Here, we studied behavioral and heart-rate (HR) responses of 2-day-old neonates to the odor of human colostrum. To evaluate detection in two conditions of stimulus delivery, we first presented the odor of total colostrum against water. Second, the hedonic specificity of total colostrum odor was tested against vanilla odor. Third, we delivered only the fresh effluvium of colostrum separated from the colostrum matrix; the stability of this colostrum effluvium was then tested after deep congelation; finally, after sorptive extraction of fresh colostrum headspace, we assessed the activity of colostrum volatiles eluting from the gas chromatograph (GC). Regardless of the stimulus-delivery method, neonates displayed attraction reactions (HR decrease) as well as appetitive oral responses to the odor of total colostrum but not to vanilla odor. The effluvium separated from the fresh colostrum matrix remained appetitive but appeared labile under deep freezing. Finally, volatiles from fresh colostrum effluvium remained behaviorally active after GC elution, although at lower magnitude. In sum, fresh colostrum effluvium and its eluate elicited a consistent increase in newborns' oral activity (relative to water or vanilla), and they induced shallow HR decrease. Newborns' appetitive oral behavior was the most reproducible response criterion to the effluvium of colostrum. In conclusion, a set of unidentified volatile compounds from human colostrum is robust enough after extraction from the original matrix and chromatographic processing to continue eliciting appetitive responses in neonates, thus opening new directions to isolate and assay specific volatile molecules of colostrum.
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Affiliation(s)
- Magali Klaey-Tassone
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
| | - Robert Soussignan
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
| | - Karine Durand
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
| | - Sarah Le Roy
- Flavour Research Group, MAPS2, Laboratoire de Génie des Procédés-Environnement-Agroalimentaire (GEPEA), CNRS (UMR 6144), ONIRIS, Nantes, France
| | - Fabrice Damon
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
| | - Angélique Villière
- Flavour Research Group, MAPS2, Laboratoire de Génie des Procédés-Environnement-Agroalimentaire (GEPEA), CNRS (UMR 6144), ONIRIS, Nantes, France
| | - Catherine Fillonneau
- Flavour Research Group, MAPS2, Laboratoire de Génie des Procédés-Environnement-Agroalimentaire (GEPEA), CNRS (UMR 6144), ONIRIS, Nantes, France
| | - Carole Prost
- Flavour Research Group, MAPS2, Laboratoire de Génie des Procédés-Environnement-Agroalimentaire (GEPEA), CNRS (UMR 6144), ONIRIS, Nantes, France
| | - Bruno Patris
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
| | - Paul Sagot
- Department of Gynecology, Obstetrics and Reproductive Biology, University Hospital Dijon and Université de Bourgogne, Dijon, France
| | - Benoist Schaal
- Development of Olfactory Communication and Cognition Laboratory; Centre for Smell, Taste and Feeding Behavior Science, CNRS (UMR 6265), Université de Bourgogne-Inrae-Institut Agro, Dijon, France
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Suwaydi MA, Lai CT, Gridneva Z, Perrella SL, Wlodek ME, Geddes DT. Sampling Procedures for Estimating the Infant Intake of Human Milk Leptin, Adiponectin, Insulin, Glucose, and Total Lipid. Nutrients 2024; 16:331. [PMID: 38337616 PMCID: PMC10857176 DOI: 10.3390/nu16030331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/17/2024] [Accepted: 01/20/2024] [Indexed: 02/12/2024] Open
Abstract
Limited attention is given to the efficacy of protocols for the estimation of infant intake of milk components when investigating their impact on infant outcomes. We compared the actual measured intake of human milk components with estimations derived from 15 protocols to determine the most reliable approach for estimating intake of HM leptin, adiponectin, insulin, glucose, and total lipid. Twenty mothers who were 3-5 months postpartum completed a 24 h milk profile study with pre-/post-feed milk samples collection. The true infant intake (control group) based on 24 h milk intake (MI) was compared to estimated infant intakes using concentrations from five sampling protocols that were multiplied by one of true infant MI, considered mean MI (800 mL), or global mean MI (766 mL). The mean measured concentrations of six samples (three sets of pre- and post-feed samples, from morning (06:00-09:00), afternoon (13:00-16:00), and evening (19:00-22:00)) multiplied by the true infant MI, mean considered MI, and global mean MI produced the most accurate estimates of infant intake of these components. Therefore, in the absence of 24 h measurements and sampling, a sampling protocol comprising three sets of pre-/post-feed samples provides the most reliable infant intake estimates of HM leptin, adiponectin, insulin, glucose, and total lipid.
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Affiliation(s)
- Majed A. Suwaydi
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- School of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia
- ABREAST Network, Perth, WA 6000, Australia
- UWA Centre for Human Lactation Research and Translation, Crawley, WA 6009, Australia
| | - Ching Tat Lai
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- ABREAST Network, Perth, WA 6000, Australia
- UWA Centre for Human Lactation Research and Translation, Crawley, WA 6009, Australia
| | - Zoya Gridneva
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- ABREAST Network, Perth, WA 6000, Australia
- UWA Centre for Human Lactation Research and Translation, Crawley, WA 6009, Australia
| | - Sharon L. Perrella
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- ABREAST Network, Perth, WA 6000, Australia
- UWA Centre for Human Lactation Research and Translation, Crawley, WA 6009, Australia
| | - Mary E. Wlodek
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- Department of Obstetrics and Gynaecology, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Donna T. Geddes
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia or (M.A.S.); (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- ABREAST Network, Perth, WA 6000, Australia
- UWA Centre for Human Lactation Research and Translation, Crawley, WA 6009, Australia
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Harries V, Corley M, Bribiescas RG. The impact of thawing duration on leptin and adiponectin levels in frozen human milk samples. Am J Hum Biol 2024; 36:e23971. [PMID: 37551086 DOI: 10.1002/ajhb.23971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 07/10/2023] [Accepted: 07/21/2023] [Indexed: 08/09/2023] Open
Abstract
BACKGROUND Measurements of hormone concentrations in human milk from understudied populations across the world is of growing scientific interest. Due to limited access to suitable laboratory facilities at many research sites, human milk samples are often shipped frozen to distant laboratories for analysis. Shipping and handling exposes samples to the risk of thawing and degradation as the results of delays, mishandling, or other unforeseen circumstances. Similar degradation risk factors are well known in serum samples. However, the vulnerability of hormone degradation in human milk to thawing during transportation is largely unexplored. Leptin and adiponectin are of particular importance due to their roles in feeding behavior and metabolism in infants, hence our focus on these two hormones. In addition, leptin and adiponectin have been shown to be vulnerable to pasteurization temperature degradation in human milk samples. AIMS We tested the degradation of human milk metabolic hormones - leptin and adiponectin - in a controlled environment in response to a variety of freeze/thaw conditions that are reflective of potential temperature fluctuations during transportation. MATERIALS & METHODS Human milk samples were experimentally subjected to thaw durations ranging from 4 to 16 h and assayed for hormonal levels to observe changes from baseline. Samples were also subjected to two additional experimental conditions, re-freezing after an extended period outside freezers or remaining thawed with additional ice packs, to investigate the impact of common transportation conditions. RESULTS We found the assayed levels of leptin were not significantly impacted by an extended thaw cycle of 16 h. However, leptin levels were impacted by the extended period of 40 h outside of the freezer. Adiponectin showed a decrease in concentration percentage after the initial 16-h thaw period, but the increased degradation between 0-16 h and 16-40 h was not as severe as that seen in the leptin samples. DISCUSSION & CONCLUSION The results of this experiment can be used to inform hormone measurement consistency given different thawing lengths or freezing conditions during transportation. Additionally, this research informs decisions regarding transportation, storage/handling, and data analysis in human milk research.
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Affiliation(s)
- Victoria Harries
- Reproductive Ecology Laboratory, Department of Anthropology, Yale University, New Haven, Connecticut, USA
- Centre for Lactation, Infant Feeding, and Translation research (LIFT), Swansea University, Swansea, UK
| | - Margaret Corley
- Reproductive Ecology Laboratory, Department of Anthropology, Yale University, New Haven, Connecticut, USA
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut, USA
| | - Richard G Bribiescas
- Reproductive Ecology Laboratory, Department of Anthropology, Yale University, New Haven, Connecticut, USA
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Malpeli A, Fasano MV, Sala M, Obregón P, Casado C, Mendez I, Fotia L, Castrogiovanni D, Varea A, Disalvo L, Tournier A, Mazziota L, Rocha D, Kruger AL, Orellano L, Andreoli MF. Leptin receptor expression in blood mononuclear cells of lactating women is associated with infant body weight: Potential role as a molecular biomarker. Pediatr Obes 2023; 18:e13072. [PMID: 37650320 DOI: 10.1111/ijpo.13072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/15/2023] [Indexed: 09/01/2023]
Abstract
BACKGROUND Molecular biomarkers of maternal leptin resistance associated with infant weight are needed. OBJECTIVES To evaluate gene expression of leptin receptor (LEPR), suppressor of cytokine signalling 3 (SOCS3) and insulin receptor in peripheral blood mononuclear cells (PBMCs) of lactating women and their relationship with infant body weight and adiposity. METHODS At day 10 postpartum, maternal gene expression in PBMCs as well as leptin and insulin concentrations in plasma and milk were assessed (n = 68). Infant weight and BMI z-scores, skinfolds and arm circumference were obtained at 10 days and/or at 3 months old. RESULTS In mothers with pre-pregnancy overweight or obesity (OW/OB), LEPR expression was reduced (p = 0.013) whereas plasma and milk leptin and milk insulin concentrations were elevated. LEPR expression was positively related with infant weight z-score (Beta (95% CI): 0.40 (0.17, 0.63), p = 0.001) but not with leptin concentrations. SOCS3 expression was positively related with infant weight z-score (Beta (95% CI): 0.28 (0.04, 0.51), p = 0.024) and arm circumference (Beta (95% CI): 0.57 (0.32, 0.82), p < 0.001). Relationships remained significant after adjusting for maternal and infant confounders. CONCLUSIONS LEPR and SOCS3 gene expression in PBMCs are novel maternal molecular biomarkers that reflect leptin resistance and are associated with infant body weight and adiposity.
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Affiliation(s)
- Agustina Malpeli
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - María Victoria Fasano
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
- Centro de Matemática de La Plata (CMaLP), Facultad de Ciencias Exactas, Universidad Nacional La Plata (UNLP) - CIC-PBA, La Plata, Argentina
| | - Marisa Sala
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Pablo Obregón
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Carla Casado
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Ignacio Mendez
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Lucrecia Fotia
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Daniel Castrogiovanni
- Instituto Multidisciplinario de Biología Celular (IMBICE), (UNLP - CIC-PBA - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)), La Plata, Argentina
| | - Ana Varea
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Liliana Disalvo
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Andrea Tournier
- Laboratorio Central, HIAEP "Sor María Ludovica" de La Plata, La Plata, Argentina
| | - Lucía Mazziota
- Laboratorio Central, HIAEP "Sor María Ludovica" de La Plata, La Plata, Argentina
| | - Daniela Rocha
- Laboratorio Central, HIAEP "Sor María Ludovica" de La Plata, La Plata, Argentina
| | - Ana Luz Kruger
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
- CONICET, La Plata, Argentina
| | - Laura Orellano
- Laboratorio Central, HIAEP "Sor María Ludovica" de La Plata, La Plata, Argentina
| | - María F Andreoli
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP), HIAEP "Sor María Ludovica" de La Plata - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
- CONICET, La Plata, Argentina
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Suwaydi MA, Lai CT, Rea A, Gridneva Z, Perrella SL, Wlodek ME, Geddes DT. Circadian Variation in Human Milk Hormones and Macronutrients. Nutrients 2023; 15:3729. [PMID: 37686759 PMCID: PMC10490050 DOI: 10.3390/nu15173729] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/16/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
There is an inadequate understanding of the daily variations in hormones and macronutrients in human milk (HM), and sample collection protocols vary considerably from study to study. To investigate changes in these milk components across 24 h, 22 lactating women collected small milk samples before and after each breastfeed or expression from each breast. Test weighing was used to determine the volume of HM consumed in each feed. The concentrations of leptin, adiponectin, insulin, fat, and glucose were measured, and the intakes were calculated. A linear mixed model was fitted to assess within-feed and circadian variation in HM feed volume and concentration, and intakes of several components. The average infant intake of HM was 879 g/24 h. Significantly higher pre-feed concentrations were found for adiponectin and glucose and lower post-feed concentrations were found for insulin and fat. Significant circadian rhythms were displayed for leptin, adiponectin, insulin, glucose (both concentration and intake), fat concentration, and milk volume. These findings demonstrate the necessity for setting up standardised and rigorous sampling procedures that consider both within-feed and circadian variations in HM components to gain a more precise understanding of the impacts of these components on infant health, growth and development.
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Affiliation(s)
- Majed A. Suwaydi
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- School of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Ching Tat Lai
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
| | - Alethea Rea
- Mathematics and Statistics, Harry Butler Institute, Murdoch University, Murdoch, WA 6150, Australia;
| | - Zoya Gridneva
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
| | - Sharon L. Perrella
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
| | - Mary E. Wlodek
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
- Department of Obstetrics and Gynaecology, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Donna T. Geddes
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia (C.T.L.); (Z.G.); (S.L.P.); (M.E.W.)
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Tomori C. Protecting, promoting and supporting breastfeeding in all policies: reframing the narrative. Front Public Health 2023; 11:1149384. [PMID: 37397783 PMCID: PMC10313398 DOI: 10.3389/fpubh.2023.1149384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 05/30/2023] [Indexed: 07/04/2023] Open
Abstract
Recent research highlights the importance of breastfeeding to health across the lifecourse, yet inadequate investment to facilitate breastfeeding according to World Health Organization recommendations threatens to undermine breastfeeding's protective effects. Western media narratives often fail to convey the significance of breastfeeding, and such narratives can hinder efforts to direct sufficient resources to scaling up effective systems and generating policy change. Delayed action disproportionately harms poor and marginalized communities. The urgency of making these investments in an era of rapidly intensifying climate change and other crises is clear. Reframing the narrative is needed to better appreciate the significance of breastfeeding as well as to recognize and address extensive efforts of undermine it. Evidence-based scientific, health professional and media discussions are necessary to recognize breastfeeding as foundational to food and health security and to enact change so that protecting, promoting and supporting breastfeeding is integrated across all policies.
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Tsutaya T, Mizushima N. Evolutionary biological perspectives on current social issues of breastfeeding and weaning. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2023. [PMID: 36815441 DOI: 10.1002/ajpa.24710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 01/25/2023] [Accepted: 01/29/2023] [Indexed: 02/24/2023]
Abstract
Breastfeeding and weaning are actively studied from evolutionary, medical, and social research perspectives because of their close association with infant mortality, lifetime health, and human population dynamics. Each discipline benefits from an interdisciplinary exchange of knowledge regarding the bases, processes, and consequences of these phenomena. However, current social issues related to breastfeeding and weaning have received little attention from an evolutionary biology perspective. We address this gap by reviewing current social issues related to human breastfeeding and weaning in an evolutionary framework. This approach helps build a conceptual framework with the goal of better understanding ultimate causes of or influences on these current social issues. The six social issues reviewed here fall into three categories: the spatiotemporal constraints of breastfeeding, abuse of breast milk as valuable material, and mismatch in breastfeeding practices. Some of these issues have an evolutionary basis. We analyze the structure of these social issues and discuss their possible solutions in terms of extension of the trade-off theory in evolutionary biology. Our discussion on the current social issues in breastfeeding and weaning highlights the effectiveness of an approach rooted in evolutionary theory and biological anthropology.
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Affiliation(s)
- Takumi Tsutaya
- Department of Evolutionary Studies of Biosystems, Research Center for Integrative Evolutionary Science, The Graduate University for Advanced Studies, Hayama, Kanagawa, Japan.,Globe Institute, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Nozomi Mizushima
- Department of Social System Design, Eikei University of Hiroshima, Naka-ku, Hiroshima, Japan
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10
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Snodgrass JJ. Minimally invasive biomarkers in human population biology research, part 2: An introduction to the special issue. Am J Hum Biol 2022; 34:e23822. [PMID: 36256677 DOI: 10.1002/ajhb.23822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 09/30/2022] [Accepted: 10/04/2022] [Indexed: 01/25/2023] Open
Abstract
Over the past several decades, biomarkers have become indispensable tools in human biology, allowing researchers to investigate biocultural and evolutionary questions and to generate basic data on health and well-being. Human biologists are central players in biomarker methods development, pioneering the creation of "field friendly," minimally invasively collected biomarker approaches, as well as leading the innovative use of biomarkers, most notably to map the complex pathways from social and environmental conditions to altered physiology to health effects. This special issue, Part 2 of a collection focused on minimally invasively collected biomarkers, is comprised of nine papers that jointly contribute to driving the science of biomarker methods development and application. This compilation of papers engages with topics such as biological normalcy, ecoimmunology, and the ethics of working with vulnerable and underserved populations. It also focuses attention on research areas at present not emphasized in human biology such as bone turnover markers as a window onto osteoporosis and osteoarthritis and the use of cancer-related biomarkers in population screening and epidemiology. Taken together, these papers help draw the roadmap for future biomarker work, emphasizing: (1) the need for systematic and transparent approaches to assay validation, with open access publication; (2) simultaneous measurement of multiple biomarkers and expanded use of instrument platforms that increase the range of physiological, genomics, and omics markers available to researchers; and, (3) increased attention to ethics and researcher responsibilities, encouraging a mindset that recognizes our obligation to provide benefits to individuals and communities and to help redress past abuses.
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Affiliation(s)
- J Josh Snodgrass
- Global Health Biomarker Laboratory, Department of Anthropology, University of Oregon, Eugene, Oregon, USA.,Center for Global Health, University of Oregon, Eugene, Oregon, USA.,Global Station for Indigenous Studies and Cultural Diversity, Hokkaido University, Sapporo, Japan
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11
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Urlacher SS, Kim EY, Luan T, Young LJ, Adjetey B. Minimally invasive biomarkers in human and non-human primate evolutionary biology: Tools for understanding variation and adaptation. Am J Hum Biol 2022; 34:e23811. [PMID: 36205445 PMCID: PMC9787651 DOI: 10.1002/ajhb.23811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/21/2022] [Accepted: 09/10/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The use of minimally invasive biomarkers (MIBs - physiological biomarkers obtained from minimally invasive sample types) has expanded rapidly in science and medicine over the past several decades. The MIB approach is a methodological strength in the field of human and non-human primate evolutionary biology (HEB). Among humans and our closest relatives, MIBs provide unique opportunities to document phenotypic variation and to operationalize evolutionary hypotheses. AIMS This paper overviews the use of MIBs in HEB. Our objectives are to (1) highlight key research topics which successfully implement MIBs, (2) identify promising yet under-investigated areas of MIB application, and (3) discuss current challenges in MIB research, with suggestions for advancing the field. DISCUSSION AND CONCLUSIONS A range of MIBs are used to investigate focal topics in HEB, including energetics and life history variation/evolution, developmental plasticity, and social status and dominance relationships. Nonetheless, we identify gaps in existing MIB research on traits such as physical growth and gut function that are central to the field. Several challenges remain for HEB research using MIBs, including the need for additional biomarkers and methods of assessment, robust validations, and approaches that are standardized across labs and research groups. Importantly, researchers must provide better support for adaptation and fitness effects in hypothesis testing (e.g., by obtaining complementary measures of energy expenditure, demonstrating redundancy of function, and performing lifetime/longitudinal analyses). We point to continued progress in the use of MIBs in HEB to better understand the past, present, and future of humans and our closest primate relatives.
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Affiliation(s)
- Samuel S. Urlacher
- Department of AnthropologyBaylor UniversityWacoTexasUSA
- Human Evolutionary Biology and Health LabBaylor UniversityWacoTexasUSA
- Child and Brain Development ProgramCIFARTorontoOntarioCanada
| | - Elizabeth Y. Kim
- Human Evolutionary Biology and Health LabBaylor UniversityWacoTexasUSA
- Department of BiologyBaylor UniversityWacoTexasUSA
| | - Tiffany Luan
- Human Evolutionary Biology and Health LabBaylor UniversityWacoTexasUSA
| | - Lauren J. Young
- Human Evolutionary Biology and Health LabBaylor UniversityWacoTexasUSA
| | - Brian Adjetey
- Human Evolutionary Biology and Health LabBaylor UniversityWacoTexasUSA
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12
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Maternal weight status and the composition of the human milk microbiome: A scoping review. PLoS One 2022; 17:e0274950. [PMID: 36191014 PMCID: PMC9529148 DOI: 10.1371/journal.pone.0274950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 09/07/2022] [Indexed: 11/19/2022] Open
Abstract
The human milk microbiome is thought to partly contribute to the assembly of the infant gut microbiome, a microbial community with important implications for infant health and development. While obesity has well-established links with the adult gut microbiome, less is known about how it affects the human milk microbiome. In this scoping review, we synthesize the current literature on the microbial composition of human milk by maternal weight status, defined broadly as BMI (prepregnancy and postpartum) and gestational weight gain (GWG). This study followed the a priori protocol published in Prospero (registration #: CRD42020165633). We searched the following databases for studies reporting maternal weight status and a characterization of milk microbiota through culture-dependent and culture-independent methods: MEDLINE, Embase, Web of Science, CINAHL, and Scopus. After screening 6,365 studies, we found 20 longitudinal and cross-sectional studies investigating associations between maternal weight status and the composition of the milk microbiome. While some studies reported no associations, many others reported that women with a pre-pregnancy or postpartum BMI characterized as overweight or obese, or with excessive GWG, had higher abundances of the genus Staphylococcus, lower Bifidobacterium abundance, and lower alpha diversity (within-sample diversity). This review suggests that maternal weight status is minorly associated with the composition of the milk microbiome in various ways. We offer potential explanations for these findings, as well as suggestions for future research.
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13
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Eckart EK, Peck JD, Kharbanda EO, Nagel EM, Fields DA, Demerath EW. Infant sex differences in human milk intake and composition from 1- to 3-month post-delivery in a healthy United States cohort. Ann Hum Biol 2022; 48:455-465. [PMID: 35105200 DOI: 10.1080/03014460.2021.1998620] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Macronutrient composition of human milk differs by infant sex, but few studies have examined sex differences in other milk components, or their potential modification by maternal body mass index (BMI). AIM We compared milk intake and human milk hormone and cytokine concentrations at 1- and 3-month post-delivery and tested infant sex by maternal BMI (OW/OB vs. NW) interactions. SUBJECTS AND METHOD Data were analysed for 346 mother-infant dyads in the Mothers and Infants Linked for Healthy Growth (MILk) Study at 1- and 3-month post-delivery. Infant milk intake was estimated by the change in infant weight after test feedings. Concentrations of glucose, insulin, leptin, adiponectin, interleukin-6 (IL-6), and C-reactive protein (CRP) were measured using ELISA. Multivariable linear regression and linear mixed models were used to estimate sex main effects and their interaction with maternal BMI. RESULTS Mean glucose concentration at 1 month was 2.62 mg/dl higher for male infants, but no difference at 3 months was observed. Milk intake and concentrations for the other milk components were similar for males and females at both time points. Associations with infant sex did not differ significantly by maternal BMI. CONCLUSIONS Among healthy United States mother-infant dyads, appetite, and growth-regulating factors in human milk did not differ significantly by infant sex.
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Affiliation(s)
- Erin K Eckart
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jennifer D Peck
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | | | - Emily M Nagel
- Department of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - David A Fields
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Ellen W Demerath
- Department of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
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14
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Tomori C. Overcoming Barriers to Breastfeeding. Best Pract Res Clin Obstet Gynaecol 2022; 83:60-71. [DOI: 10.1016/j.bpobgyn.2022.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 12/23/2022]
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15
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Siziba LP, Brenner H, Amitay EL, Koenig W, Rothenbacher D, Genuneit J. Potential sex differences in human milk leptin and their association with asthma and wheeze phenotypes: Results of the Ulm Birth Cohorts. Pediatr Allergy Immunol 2021; 32:1663-1672. [PMID: 34173262 DOI: 10.1111/pai.13586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 01/18/2023]
Abstract
BACKGROUND The hormone leptin has been suggested to play a role in the respiratory and immune systems. Evidence on sex-specific concentrations of leptin in human milk and sex-specific associations with the development of asthma and wheeze has been put forward but is still scarce. OBJECTIVE To investigate whether male and female infants receive different levels of leptin through human milk and whether leptin is implicated in the development of asthma and wheeze in a sex-dependent manner using data from the two Ulm Birth Cohort studies. METHODS Leptin data were available from human milk samples collected at 6 weeks (Ulm Birth Cohort Study [UBCS, n = 678; Ulm SPATZ Health Study, n = 587]), and, in SPATZ only, at 6 months (n = 377) and 12 months (n = 66) of lactation. Sex-specific associations with doctor-diagnosed asthma and wheeze phenotypes were assessed in crude and adjusted models using logistic regression. Adjustments were made for maternal allergy, exclusive breastfeeding, infant age at the time of milk sampling, and child BMI z-score. RESULTS At 6 weeks, leptin levels (median [min, max], in ng/L) were higher in the milk for girls (197 [0.100, 4120]) than in milk for boys (159 [1.02, 3280], p = .045) in UBCS. No significant sex differences were observed in SPATZ (p = .152). There were no significant associations of leptin with asthma or wheeze in both studies, even in a sex-dependent manner (p > .05). CONCLUSION It remains unclear whether male and female infants receive different levels of leptin through human milk. However, leptin in human milk may not be associated with history and development of asthma and wheeze in a sex-specific manner.
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Affiliation(s)
- Linda P Siziba
- Pediatric Epidemiology, Department of Pediatrics, Medical Faculty, Leipzig University, Leipzig, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Efrat L Amitay
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Wolfgang Koenig
- Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | | | - Jon Genuneit
- Pediatric Epidemiology, Department of Pediatrics, Medical Faculty, Leipzig University, Leipzig, Germany.,Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
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16
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Leonard WR. Novel applications of minimally invasive biomarkers in human biology research. Am J Hum Biol 2021; 33:e23568. [PMID: 33442918 DOI: 10.1002/ajhb.23568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- William R Leonard
- Department of Anthropology & Program in Global Health Studies, Northwestern University, Evanston, Illinois, USA
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