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Campbell B. Recent Research on the Human Biology of Pastoralists. Am J Hum Biol 2024:e24156. [PMID: 39290108 DOI: 10.1002/ajhb.24156] [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: 06/15/2024] [Revised: 08/29/2024] [Accepted: 08/30/2024] [Indexed: 09/19/2024] Open
Abstract
Despite encroachment by agricultural systems and globalization, pastoral nomads maintain a robust presence in terms of numbers and subsistence activity. At the same time, increasing concern about climate change has promoted awareness that increased climatic fluctuation may push pastoral population past their capacity for resilience. The response of pastoralists to climate change has important implications for our evolutionary past and our increasingly problematic future. Yet, pastoralists have received less explicit attention than foragers as populations under consistent selective constraints including limited caloric intake, high levels of habitual activity, and high disease burdens. Additional factors include exposure to cold and high temperatures, as well as high altitude. Over the last 20 or so years, the use of new techniques for measuring energetics, including actigraphs and doubly labeled water have built on existing noninvasive sample collection for hormones, immune markers and genes to provide a more detailed picture of the human biology of pastoral populations. Here I consider recent work on pastoralists from Siberia and northern Europe, Africa, Asia, and South America. I survey what is known about maternal milk composition and infant health, childhood growth, lactase persistence, and adult energy expenditure and lactase persistence to build a picture of the pastoralist biological response to environmental conditions, including heat, cold, and high altitude. Where available I include information about population history because of its importance for selection. I end by outlining the impact of milk consumption and climate over the human life cycle and make suggestions for further research.
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Affiliation(s)
- Benjamin Campbell
- Department of Anthropology, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
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2
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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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Mazur K, Kusznierewicz B, Martysiak-Żurowska D, Drążkowska I, Malinowska-Pańczyk E. The Effect of Hyperbaric Storage on the Nutritional Value and Retention of Certain Bioactive Proteins in Human Milk. Nutrients 2024; 16:1455. [PMID: 38794693 PMCID: PMC11124269 DOI: 10.3390/nu16101455] [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: 03/22/2024] [Revised: 05/09/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Human milk (HM) contains the essential macronutrients and bioactive compounds necessary for the normal growth and development of newborns. The milk collected by human milk banks is stored frozen and pasteurized, reducing its nutritional and biological value. The purpose of this study was to determine the effect of hyperbaric storage at subzero temperatures (HS-ST) on the macronutrients and bioactive proteins in HM. As control samples, HM was stored at the same temperatures under 0.1 MPa. A Miris HM analyzer was used to determine the macronutrients and the energy value. The lactoferrin (LF), lysozyme (LYZ) and α-lactalbumin (α-LAC) content was checked using high-performance liquid chromatography, and an ELISA test was used to quantify secretory immunoglobulin A (sIgA). The results showed that the macronutrient content did not change significantly after 90 days of storage at 60 MPa/-5 °C, 78 MPa/-7 °C, 111 MPa/-10 °C or 130 MPa/-12 °C. Retention higher than 90% of LYZ, α-LAC, LF and sIgA was observed in the HM stored at conditions of up to 111 MPa/-10 °C. However, at 130 MPa/-12 °C, there was a reduction in LYZ and LF, by 39 and 89%, respectively. The storage of HM at subzero temperatures at 0.1 MPa did not affect the content of carbohydrates or crude and true protein. For fat and the energy value, significant decreases were observed at -5 °C after 90 days of storage.
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Affiliation(s)
- Katarzyna Mazur
- Department of Food Chemistry, Technology and Biotechnology, Chemical Faculty, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdańsk, Poland; (K.M.); (B.K.); (D.M.-Ż.)
| | - Barbara Kusznierewicz
- Department of Food Chemistry, Technology and Biotechnology, Chemical Faculty, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdańsk, Poland; (K.M.); (B.K.); (D.M.-Ż.)
| | - Dorota Martysiak-Żurowska
- Department of Food Chemistry, Technology and Biotechnology, Chemical Faculty, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdańsk, Poland; (K.M.); (B.K.); (D.M.-Ż.)
| | - Izabela Drążkowska
- Division of Neonatology, Medical University of Gdańsk, 80-210 Gdańsk, Poland;
| | - Edyta Malinowska-Pańczyk
- Department of Food Chemistry, Technology and Biotechnology, Chemical Faculty, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdańsk, Poland; (K.M.); (B.K.); (D.M.-Ż.)
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4
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Glick VJ, Power ML. Macronutrient composition of milk from captive southern pig-tailed macaques (Macaca nemestrina). Am J Primatol 2024; 86:e23570. [PMID: 37876290 DOI: 10.1002/ajp.23570] [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: 05/15/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/26/2023]
Abstract
Milk composition is a fundamental aspect of mammalian reproduction. Differences in milk composition between species may reflect phylogeny, dietary ecology, lactation strategy, and infant growth patterns, but may also vary within a species due to maternal body condition. This study presents the first published data on milk macronutrient composition of southern pig-tailed macaques (Macaca nemestrina) and compares the results with data on two other Cercopithecine species. Milk samples were obtained from five dams at 10- and 14-weeks postparturition. Macronutrient composition was determined at the Smithsonian's National Zoo and Conservation Biology Institute using proven methods developed over 30 years. On average (±SEM), the milk contained 83.9 ± 0.4% water, 6.7 ± 0.4% fat, 7.6 ± 0.1% sugar, 1.8 ± 0.1% protein, and 0.22 ± 0.01% mineral content. The Ca:P ratio was 1.8; concentrations of Ca and protein were correlated. Mean gross energy was 1.02 ± 0.03 kcal/g with most of the energy coming from fat (59.6 ± 1.5%), followed by sugar (29.9 ± 1.4%) and protein (10.5 ± 0.5%). The milks at 14 weeks of infant age were higher in energy than the milks at 10 weeks, with an increase in energy from fat (p = 0.005) and decrease in energy from sugar (p = 0.018). The energy from protein did not change (p = 0.272). Compared to captive rhesus macaque (Macaca mulatta) and olive baboon (Papio anubis) milk assayed by identical methods, captive pig-tailed macaque milk was higher in energy, but after accounting for the higher milk energy there was no difference in the proportions of milk energy from protein, fat, and sugar. The captive pig-tailed dams were significantly heavier than reported values for wild pig-tailed macaques, suggesting high body condition. High body condition in captive Cercopithecines appears to result in milk higher in energy, with more energy coming from fat and less from sugar. However, variation in the proportion of milk energy from protein in captive Cercopithecine milks appears relatively constrained.
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Affiliation(s)
- Virginia J Glick
- Department of Immunology and Infectious Disease, Harvard School of Public Health, Harvard University, Boston, Massachusetts, USA
- Center for Species Survival, Smithsonian's National Zoo and Conservation Biology Institute, Washington, District of Columbia, USA
| | - Michael L Power
- Center for Species Survival, Smithsonian's National Zoo and Conservation Biology Institute, Washington, District of Columbia, USA
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5
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Nommsen-Rivers L, Black MM, Christian P, Groh-Wargo S, Heinig MJ, Israel-Ballard K, Obbagy J, Palmquist AEL, Stuebe A, Barr SM, Proaño GV, Moloney L, Steiber A, Raiten DJ. An equitable, community-engaged translational framework for science in human lactation and infant feeding-a report from "Breastmilk Ecology: Genesis of Infant Nutrition (BEGIN)" Working Group 5. Am J Clin Nutr 2023; 117 Suppl 1:S87-S105. [PMID: 37173062 DOI: 10.1016/j.ajcnut.2023.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 12/21/2022] [Accepted: 01/03/2023] [Indexed: 05/15/2023] Open
Abstract
Human milk is the ideal source of nutrition for most infants, but significant gaps remain in our understanding of human milk biology. As part of addressing these gaps, the Breastmilk Ecology: Genesis of Infant Nutrition (BEGIN) Project Working Groups 1-4 interrogated the state of knowledge regarding the infant-human milk-lactating parent triad. However, to optimize the impact of newly generated knowledge across all stages of human milk research, the need remained for a translational research framework specific to the field. Thus, with inspiration from the simplified environmental sciences framework of Kaufman and Curl, Working Group 5 of the BEGIN Project developed a translational framework for science in human lactation and infant feeding, which includes 5 nonlinear, interconnected translational stages, T1: Discovery; T2: Human health implications; T3: Clinical and public health implications; T4: Implementation; and T5: Impact. The framework is accompanied by 6 overarching principles: 1) Research spans the translational continuum in a nonlinear, nonhierarchical manner; 2) Projects engage interdisciplinary teams in continuous collaboration and cross talk; 3) Priorities and study designs incorporate a diverse range of contextual factors; 4) Research teams include community stakeholders from the outset through purposeful, ethical, and equitable engagement; 5) Research designs and conceptual models incorporate respectful care for the birthing parent and address implications for the lactating parent; 6) Research implications for real-world settings account for contextual factors surrounding the feeding of human milk, including exclusivity and mode of feeding. To demonstrate application of the presented translational research framework and its overarching principles, 6 case studies are included, each illustrating research gaps across all stages of the framework. Applying a translational framework approach to addressing gaps in the science of human milk feeding is an important step toward the aligned goals of optimizing infant feeding across diverse contexts as well as optimizing health for all.
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Affiliation(s)
| | - Maureen M Black
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA; RTI International, Research Triangle Park, NC, USA
| | - Parul Christian
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Sharon Groh-Wargo
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - M Jane Heinig
- Department of Nutrition, University of California Davis, Davis, CA, USA
| | | | - Julie Obbagy
- Center for Nutrition Policy and Promotion, Food and Nutrition Service, US Department of Agriculture, Washington, DC, USA
| | - Aunchalee E L Palmquist
- Department of Maternal & Child Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alison Stuebe
- Division of Maternal-Fetal Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | | | - Lisa Moloney
- Academy of Nutrition and Dietetics, Chicago, IL, USA
| | | | - Daniel J Raiten
- Pediatric Growth and Nutrition Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
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6
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Zhang Z, Wang Y, Yang X, Cheng Y, Zhang H, Xu X, Zhou J, Chen H, Su M, Yang Y, Su Y. Human Milk Lipid Profiles around the World: A Systematic Review and Meta-Analysis. Adv Nutr 2022; 13:2519-2536. [PMID: 36083999 PMCID: PMC9776668 DOI: 10.1093/advances/nmac097] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 03/08/2022] [Accepted: 09/01/2022] [Indexed: 01/29/2023] Open
Abstract
Reported breast milk lipid concentrations may vary with geographical region, postnatal age, and year of sample collection. In this review, we summarized data on the concentrations of total fat, total phospholipids, cholesterol, and fatty acids in human milk worldwide and their variation according to lactation stage, study area, and sample collection year. A systematic literature search was performed using the PubMed, Embase, Web of Science, and Medline databases for English-language papers and Wanfang and China National Knowledge Infrastructure databases for Chinese-language papers. A total of 186 studies evaluating the human milk lipid profiles were included. According to random-effects models based on worldwide data, the summarized means (95% CIs) as percentages of total fat were 42.2% (41.1%, 43.3%) for SFAs, 36.6% (35.6%, 37.5%) for MUFAs, and 21.0% (19.3%, 22.7%) for PUFAs. However, the study heterogeneity was high for most types of fatty acids (I2 > 99%). Human milk from Western countries had higher concentrations of MUFAs and 18:1n-9 (ω-9), but lower concentrations of PUFAs, 18:2n-6, 20:4n-6, 18:3n-3, 20:5n-3, 22:6n-3, and total n-6 PUFA compared with those from non-Western countries (P < 0.001-0.011). Significant lactation stage differences were observed for total fat and some individual fatty acids. The concentrations of SFAs and 16:0 were significantly negatively correlated with sampling year (P < 0.001-0.028). In contrast, a significant positive correlation between the concentrations of 18:2n-6 and 18:3n-3 and sampling year was observed (P < 0.001-0.035). Our results suggest that the pooling of data on human milk lipid profiles in different studies should be done with caution due to the high between-study heterogeneity. The concentration of lipids, including total fat, cholesterol, and specific fatty acids, differs in human milk according to lactation stage, geographical region, and year of sample collection.
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Affiliation(s)
- Zheqing Zhang
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yingyao Wang
- Chinese Nutrition Society, Beijing, China,CNS Academy of Nutrition and Health (Beijing Zhongyinghui Nutrition and Health Research Institute), Beijing, China
| | - Xiaoguang Yang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yiyong Cheng
- Institute of Health & Environmental Medicine, Tianjin, China
| | - Hong Zhang
- Wilmar (Shanghai) Biotechnology Research & Development Center Co., Ltd., Shanghai, China
| | - Xuebing Xu
- Wilmar (Shanghai) Biotechnology Research & Development Center Co., Ltd., Shanghai, China
| | - Jin Zhou
- CNS Academy of Nutrition and Health (Beijing Zhongyinghui Nutrition and Health Research Institute), Beijing, China
| | - Hengying Chen
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Mengyang Su
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
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7
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Maternal dietary intake, nutritional status and macronutrient composition of human breast milk: systematic review. Br J Nutr 2022; 127:1796-1820. [PMID: 34294167 DOI: 10.1017/s0007114521002786] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Human breast milk (BM) is the best source of nutrition in early life, particularly during the first 6 months. Nevertheless, human BM composition is variable, and more insight in the exact factors contributing to this variability is warranted. In this review, we explored the impact of maternal dietary intake and nutritional status (e.g. anthropometric measures, BMI, bioimpedance) on human milk macronutrient composition. PubMed, Scopus and Cochrane were systematically searched till November 2019. In total, 4946 publications underwent title-abstract screening; 101 publications underwent full-text screening. Eventually, fifty publications were included in this review, investigating either associations between maternal dietary intake (n 29) and/or maternal nutritional status (n 29), and macronutrient composition of human BM. Reported energy composition ranged from 213 to 301 kJ/100 ml, and 67 % and 54 % of the studies reported associations between with maternal nutritional intake and status, respectively. Protein content ranged from 0·8 to 3·3 g/100 ml, and four studies suggested a negative association with nutritional status. Fat content ranged from 2·1 to 9·8 g/100 ml, and 68 % of the studies reported positive associations with nutritional status. Carbohydrate content ranged from 5·8 to 7·5 g/100 ml, and 67 % of the included studies did not report an association between intake and status. Literature investigating associations of maternal dietary intake and nutrition status with BM composition of macronutrients and energy content is diversified, both in terms of used methodology and results. Further studies using well-defined and standard parameters are essential to aid the formulation of scientific recommendations.
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Mohammed MEA, Brima EI, Alasidy A, Qurishi N, Algarni M, Alshehri BMA. Physicochemical properties and some mineral concentration of milk samples from different animals and altitudes. OPEN CHEM 2022. [DOI: 10.1515/chem-2022-0171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
This study investigated the effect of animal origin and altitude on some physicochemical properties of milk and on the concentration of some minerals. The studied parameters were pH, conductivity, specific gravity, moisture, ash, total dissolved solids (TDS), sodium, potassium, and calcium. The milk samples were collected from camels (8), goats (5), and sheep (6). The samples were obtained from two altitudes: 14 and 2,110 m above sea level. At the low altitude, the conductivity was significantly different between the milks of the three ruminants and the moisture, TDS, specific gravity, and calcium were significantly different between the camel and sheep milks. Regarding the animals living at the high altitude, the moisture, TDS, specific gravity, and the ash were significantly different between the camel and sheep milks and between the sheep and goat milks. Concerning the effect of altitude on the studied parameters of the milk, it had variable significant effects on the studied parameters according to the animal origin. The animal origin and the altitude had significant effects on the milk conductivity, ash, and specific gravity.
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Affiliation(s)
- Mohammed Elimam Ahamed Mohammed
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
- Unit of Bee Research and Honey Production, King Khalid University , Abha , Saudi Arabia
- Research Center for Material Science, King Khalid University , Abha , Saudi Arabia
| | - Eid Ibrahim Brima
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
- School of Allied Health Science, Faculty of Health and Life Sciences, De Montfort University, The Gateway , Leicester LE1 9BH , UK
| | - Aaed Alasidy
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
| | - Nasir Qurishi
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
| | - Moad Algarni
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
| | - Badria Mohammed Abdallah Alshehri
- Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia
- Unit of Bee Research and Honey Production, King Khalid University , Abha , Saudi Arabia
- Research Center for Material Science, King Khalid University , Abha , Saudi Arabia
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Gridneva Z, George AD, Suwaydi MA, Sindi AS, Jie M, Stinson LF, Geddes DT. Environmental determinants of human milk composition in relation to health outcomes. Acta Paediatr 2022; 111:1121-1126. [PMID: 35067980 DOI: 10.1111/apa.16263] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/29/2021] [Accepted: 01/20/2022] [Indexed: 12/11/2022]
Abstract
Humans are exposed to environmental factors at every stage of life including infancy. The aim of this mini-review was to present a narrative of environmental factors influencing human milk composition. Current literature shows lactation is a dynamic process and is responsive to multiple environmental challenges including geographical location, lifestyle, persistent pollutants and maternal factors (ethnicity, diet, stress, allergy and adiposity) that may influence human milk composition in a synergistic manner and should be considered in order to improve infant and maternal outcomes on a populations scale. Further interventional studies on larger international cohorts are needed to elucidate these complex relationships. Lactating women should aim for a healthy lifestyle and maintain a healthy body composition prior to and throughout the reproductive period, including during lactation.
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Affiliation(s)
- Zoya Gridneva
- School of Molecular Sciences The University of Western Australia Crawley Western Australia Australia
- International Society for Research in Human Milk and Lactation Minneapolis MN USA
| | - Alexandra D. George
- International Society for Research in Human Milk and Lactation Minneapolis MN USA
- Metabolomics Laboratory Baker Heart and Diabetes Institute Melbourne Victoria Australia
| | - Majed A. Suwaydi
- School of Molecular Sciences The University of Western Australia Crawley Western Australia Australia
- Department of Medical Laboratory Technology College of Applied Medical Sciences Jazan University Jazan Saudi Arabia
| | - Azhar S. Sindi
- Division of Obstetrics and Gynaecology School of Medicine The University of Western Australia Crawley Western Australia Australia
- College of Applied Medical Sciences Umm Al‐Qura University Makkah Saudi Arabia
| | - Ma Jie
- School of Molecular Sciences The University of Western Australia Crawley Western Australia Australia
| | - Lisa F. Stinson
- School of Molecular Sciences The University of Western Australia Crawley Western Australia Australia
- International Society for Research in Human Milk and Lactation Minneapolis MN USA
| | - Donna T. Geddes
- School of Molecular Sciences The University of Western Australia Crawley Western Australia Australia
- International Society for Research in Human Milk and Lactation Minneapolis MN USA
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10
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Ryoo CJ, Kang NM. Maternal Factors Affecting the Macronutrient Composition of Transitional Human Milk. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:3308. [PMID: 35328998 PMCID: PMC8955619 DOI: 10.3390/ijerph19063308] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/25/2022] [Accepted: 03/08/2022] [Indexed: 12/17/2022]
Abstract
This study investigated the influence of selected maternal factors on the macronutrient composition and energy of human milk (HM). The study enrolled 159 breastfeeding mothers from five postpartum care centers in Seoul, Korea. Their gestational weeks were 37−42 weeks, they had no complications before and after childbirth, and were at 7−14 days postpartum. They provided data using structured questionnaires on general characteristics, stress, sleep quality, spousal support, and dietary intake. Breastfeeding assessment (LATCH) was investigated by qualified nurses, and each mother provided one sample of HM. The HM composition was analyzed using the Miris® HM analyzer. The relationships between variables were analyzed using Pearson’s correlation analysis, and a linear regression analysis was performed to verify the main variables. It was found that maternal dietary intake was related to HM composition as the %energy from carbohydrates (β = 0.86, p < 0.01) and %energy from fat (β = 0.77, p < 0.05) showed positive relationships with HM energy. The LATCH score was positively related to HM energy (β = 0.17, p < 0.05). In contrast, postpartum stress, sleep quality, and spousal support were not associated with HM macronutrient composition. In conclusion, HM macronutrients and energy content were associated with maternal dietary intake and LATCH scores, but not with postpartum stress, sleep quality, and spousal support.
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Affiliation(s)
| | - Nam Mi Kang
- Department of Nursing, Research Institute for Biomedical & Health
Science, Konkuk University, Chungju 27478, Chungcheongbuk-do, Korea;
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11
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Human milk cholesterol is associated with lactation stage and maternal plasma cholesterol in Chinese populations. Pediatr Res 2022; 91:970-976. [PMID: 33846555 DOI: 10.1038/s41390-021-01440-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 10/23/2020] [Accepted: 12/01/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Milk cholesterol concentrations throughout lactation were analyzed, and the relationship between maternal plasma cholesterol and milk cholesterol in various Chinese populations was examined. METHODS A sub-sample of 1138 lactating women was randomly selected from a large cross-sectional study in China (n = 6481). Milk cholesterol concentrations were determined by HPLC, and concentrations of maternal plasma lipids were determined by an automated biochemical analyzer. RESULTS The mean cholesterol concentrations were 200, 171, and 126 mg/L for colostrum, transitional milk, and mature milk, respectively. Cholesterol concentrations differed significantly between stages of lactation (colostrum vs. transitional milk, colostrum vs. mature milk, transitional milk vs. mature milk, all p < 0.001). Concentrations of maternal plasma total cholesterol (TC) (p = 0.02) and low-density lipoprotein cholesterol (LDL-C) (p = 0.03) were significantly associated with milk cholesterol. Milk cholesterol concentrations varied among different ethnicities (Tibetan vs. Hui: 164 vs. 131 mg/L, p = 0.027) but not among different geographic regions. CONCLUSIONS The concentration of cholesterol in human milk changes dynamically throughout lactation. Milk cholesterol concentrations are significantly associated with maternal plasma concentrations of TC and LDL-C, and milk cholesterol concentrations vary across ethnicities in China. IMPACT Concentrations of milk cholesterol were measured in various Chinese populations. Cholesterol concentrations differ significantly between stages of lactation. Maternal plasma total cholesterol and low-density lipoprotein cholesterol are associated with milk cholesterol. Milk cholesterol concentrations vary across ethnicities in China.
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12
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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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Binte Abu Bakar SY, Salim M, Clulow AJ, Nicholas KR, Boyd BJ. Human milk composition and the effects of pasteurisation on the activity of its components. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.02.055] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Robertson CE, McClelland GB. Evolved changes in maternal care in high-altitude native deer mice. J Exp Biol 2021; 224:238725. [PMID: 34424979 DOI: 10.1242/jeb.235218] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 02/25/2021] [Indexed: 01/13/2023]
Abstract
At high altitude (HA), unremitting low oxygen and persistent cold push small mammals close to their metabolic ceilings, leaving limited scope for aerobically demanding activities. However, HA breeding seasons are relatively short and endemic rodents compensate with larger litters than low altitude (LA) conspecifics. Rodent mothers are the sole source of heat and nutrition for altricial offspring and lactation is energetically costly. Thus, it is unclear how HA females balance energy allocation during the nursing period. We hypothesized that HA female rodents invest heavily in each litter to ensure postnatal survival. We measured maternal energetic output and behaviour in nursing deer mice (Peromyscus maniculatus) native to LA (400 m a.s.l.) and HA (4350 m a.s.l.) under control (24°C, 760 mmHg) and cold hypoxia conditions, simulating HA (5°C, 430 mmHg). Strikingly, resting metabolic rates of lactating HA and LA females under cold hypoxia were 70-85% of their maximum aerobic capacity. In cold hypoxia, LA mothers increased both nursing time and milk fat content, however their pups were leaner and severely growth restricted at weaning. HA mothers also increased nursing in cold hypoxia but for far less time than LA mothers. Despite receiving less care, HA pups in cold hypoxia only experienced small growth restrictions at weaning and maintained body composition. As adults, HA mice raised in cold hypoxia had increased aerobic capacity compared to controls. These data suggest that HA mothers prioritize their own maintenance costs over investing heavily in their offspring. Pups compensate for this lack of care, likely by reducing their own metabolic costs during development.
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Affiliation(s)
- Cayleih E Robertson
- Department of Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4K1, Canada
| | - Grant B McClelland
- Department of Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4K1, Canada
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15
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Nauwelaerts N, Deferm N, Smits A, Bernardini C, Lammens B, Gandia P, Panchaud A, Nordeng H, Bacci ML, Forni M, Ventrella D, Van Calsteren K, DeLise A, Huys I, Bouisset-Leonard M, Allegaert K, Annaert P. A comprehensive review on non-clinical methods to study transfer of medication into breast milk - A contribution from the ConcePTION project. Biomed Pharmacother 2021; 136:111038. [PMID: 33526310 DOI: 10.1016/j.biopha.2020.111038] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 11/03/2020] [Accepted: 11/16/2020] [Indexed: 12/23/2022] Open
Abstract
Breastfeeding plays a major role in the health and wellbeing of mother and infant. However, information on the safety of maternal medication during breastfeeding is lacking for most medications. This leads to discontinuation of either breastfeeding or maternal therapy, although many medications are likely to be safe. Since human lactation studies are costly and challenging, validated non-clinical methods would offer an attractive alternative. This review gives an extensive overview of the non-clinical methods (in vitro, in vivo and in silico) to study the transfer of maternal medication into the human breast milk, and subsequent neonatal systemic exposure. Several in vitro models are available, but model characterization, including quantitative medication transport data across the in vitro blood-milk barrier, remains rather limited. Furthermore, animal in vivo models have been used successfully in the past. However, these models don't always mimic human physiology due to species-specific differences. Several efforts have been made to predict medication transfer into the milk based on physicochemical characteristics. However, the role of transporter proteins and several physiological factors (e.g., variable milk lipid content) are not accounted for by these methods. Physiologically-based pharmacokinetic (PBPK) modelling offers a mechanism-oriented strategy with bio-relevance. Recently, lactation PBPK models have been reported for some medications, showing at least the feasibility and value of PBPK modelling to predict transfer of medication into the human milk. However, reliable data as input for PBPK models is often missing. The iterative development of in vitro, animal in vivo and PBPK modelling methods seems to be a promising approach. Human in vitro models will deliver essential data on the transepithelial transport of medication, whereas the combination of animal in vitro and in vivo methods will deliver information to establish accurate in vitro/in vivo extrapolation (IVIVE) algorithms and mechanistic insights. Such a non-clinical platform will be developed and thoroughly evaluated by the Innovative Medicines Initiative ConcePTION.
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Affiliation(s)
- Nina Nauwelaerts
- KU Leuven Drug Delivery and Disposition Lab, Department of Pharmaceutical and Pharmacological Sciences, O&N II Herestraat, 49 3000, Leuven, Belgium.
| | - Neel Deferm
- KU Leuven Drug Delivery and Disposition Lab, Department of Pharmaceutical and Pharmacological Sciences, O&N II Herestraat, 49 3000, Leuven, Belgium.
| | - Anne Smits
- Neonatal Intensive Care Unit, University Hospitals Leuven, UZ Leuven, Neonatology, Herestraat 49, 3000, Leuven, Belgium; Department of Development and Regeneration, KU Leuven, Belgium.
| | - Chiara Bernardini
- Department of Veterinary Medical Sciences, University of Bologna, 40064, Ozzano dell'Emilia, BO, Italy.
| | | | - Peggy Gandia
- Laboratoire de Pharmacocinétique et Toxicologie, Centre Hospitalier Universitaire de Toulouse, France.
| | - Alice Panchaud
- Service of Pharmacy Service, Lausanne University Hospital and University of Lausanne, Switzerland; Institute of Primary Health Care (BIHAM), University of Bern, Switzerland
| | - Hedvig Nordeng
- PharmacoEpidemiology and Drug Safety Research Group, Department of Pharmacy, University of Oslo, PB. 1068 Blindern, 0316, Oslo, Norway.
| | - Maria Laura Bacci
- Department of Veterinary Medical Sciences, University of Bologna, 40064, Ozzano dell'Emilia, BO, Italy.
| | - Monica Forni
- Department of Veterinary Medical Sciences, University of Bologna, 40064, Ozzano dell'Emilia, BO, Italy.
| | - Domenico Ventrella
- Department of Veterinary Medical Sciences, University of Bologna, 40064, Ozzano dell'Emilia, BO, Italy.
| | | | - Anthony DeLise
- Novartis Pharmaceuticals Corporation, Novartis Institutes for BioMedical Research, One Health Plaza, East Hanover, NJ, 07936, USA.
| | - Isabelle Huys
- KU Leuven, Department of Clinical Pharmacology and Pharmacotherapy, ON II Herestraat 49 - bus, 521 3000, Leuven, Belgium.
| | - Michele Bouisset-Leonard
- Novartis Pharma AG, Novartis Institutes for BioMedical Research, Werk Klybeck Postfach, Basel, CH-4002, Switzerland.
| | - Karel Allegaert
- Department of Development and Regeneration, KU Leuven, Belgium; KU Leuven, Department of Clinical Pharmacology and Pharmacotherapy, ON II Herestraat 49 - bus, 521 3000, Leuven, Belgium; Department of Clinical Pharmacy, Erasmus MC, Rotterdam, the Netherlands.
| | - Pieter Annaert
- KU Leuven Drug Delivery and Disposition Lab, Department of Pharmaceutical and Pharmacological Sciences, O&N II Herestraat, 49 3000, Leuven, Belgium.
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16
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Quinn EA. Centering human milk composition as normal human biological variation. Am J Hum Biol 2021; 33:e23564. [DOI: 10.1002/ajhb.23564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 11/25/2020] [Accepted: 12/23/2020] [Indexed: 02/06/2023] Open
Affiliation(s)
- Elizabeth A. Quinn
- Department of Anthropology Washington University in St. Louis Saint Louis Missouri USA
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17
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Pu J, Vinitchaikul P, Gu Z, Mao H, Zhang F. The use of metabolomics to reveal differences in functional substances of milk whey of dairy buffaloes raised at different altitudes. Food Funct 2021; 12:5440-5450. [PMID: 33997869 DOI: 10.1039/d0fo03231j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Buffalo milk is nutrient-rich and contains less cholesterol than cow milk. Dairy buffaloes are widely distributed at different altitudes in the Yunnan Province, China; however, the impacts of altitude on the whey-derived functional metabolites of buffalo milk whey are not well understood. Here, we used non-targeted and targeted metabolomics to evaluate the differential metabolites in the milk whey of buffaloes raised at low altitudes (LA), medium altitudes (MA), and high altitudes (HA). ANOVA statistical test was performed to acquire differential metabolites using IBM SPSS statistics 22 software. The results showed that LA- and MA-milk whey had higher levels of amino acids (glutamine and pyroglutamic acid) and vitamin B6 than HA-milk whey. LA-milk whey had higher levels of the carbohydrates involved in galactose, amino sugar, and nucleotide sugar metabolism than MA- and HA-milk whey, but HA-milk whey showed significantly higher levels of free fatty acids. In conclusion, owing to the biological functions of their most abundant components, LA-milk is more suitable for the production of functional milk with high levels of amino acids, vitamin B6, and carbohydrates; while HA-milk is suitable as raw milk for the production of dairy products with high free fatty acid content.
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Affiliation(s)
- Jinhui Pu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
| | | | - Zhaobing Gu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
| | - Huaming Mao
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
| | - Fulan Zhang
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
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18
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Robertson CE, Wilsterman K. Developmental and reproductive physiology of small mammals at high altitude: challenges and evolutionary innovations. ACTA ACUST UNITED AC 2020; 223:223/24/jeb215350. [PMID: 33443053 DOI: 10.1242/jeb.215350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
High-altitude environments, characterized by low oxygen levels and low ambient temperatures, have been repeatedly colonized by small altricial mammals. These species inhabit mountainous regions year-round, enduring chronic cold and hypoxia. The adaptations that allow small mammals to thrive at altitude have been well studied in non-reproducing adults; however, our knowledge of adaptations specific to earlier life stages and reproductive females is extremely limited. In lowland natives, chronic hypoxia during gestation affects maternal physiology and placental function, ultimately limiting fetal growth. During post-natal development, hypoxia and cold further limit growth both directly by acting on neonatal physiology and indirectly via impacts on maternal milk production and care. Although lowland natives can survive brief sojourns to even extreme high altitude as adults, reproductive success in these environments is very low, and lowland young rarely survive to sexual maturity in chronic cold and hypoxia. Here, we review the limits to maternal and offspring physiology - both pre-natal and post-natal - that highland-adapted species have overcome, with a focus on recent studies on high-altitude populations of the North American deer mouse (Peromyscus maniculatus). We conclude that a combination of maternal and developmental adaptations were likely to have been critical steps in the evolutionary history of high-altitude native mammals.
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Affiliation(s)
| | - Kathryn Wilsterman
- Division of Biological Sciences, University of Montana, Missoula, MT 59802, USA
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19
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Palmquist AEL, Asiodu IV, Quinn EA. The COVID-19 liquid gold rush: Critical perspectives of human milk and SARS-CoV-2 infection. Am J Hum Biol 2020; 32:e23481. [PMID: 32761732 PMCID: PMC7435540 DOI: 10.1002/ajhb.23481] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/13/2022] Open
Affiliation(s)
- Aunchalee E L Palmquist
- Department of Maternal and Child Health, Carolina Global Breastfeeding Institute, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Ifeyinwa V Asiodu
- School of Nursing, University of California San Francisco, San Francisco, California, USA
| | - Elizabeth A Quinn
- Department of Anthropology, Washington University in St. Louis, St. Louis, Missouri, USA
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20
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Quinn EA, Childs G. Trekking and toddlers: Towards a biocultural analysis of growth among infants and young children in a rural region of the Himalayas. Am J Hum Biol 2020; 32:e23452. [PMID: 32543052 DOI: 10.1002/ajhb.23452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 05/14/2020] [Accepted: 05/19/2020] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES Rapid socioeconomic change, associated with development and a growing tourism industry is occurring across the Himalayas. The health impact of this rapid economic development is poorly understood, especially for infants and young children. This study investigated the associations between village level economic differences as indexed by economic development and tourism engagement on infant and young child growth and health in a population of ethnic Tibetans living in the western Himalayas of Nepal. METHODS One hundred and fifty nine infants and young children (ages 1-24 months) were enrolled. Anthropometric data (height, weight, triceps skinfold thickness) were collected at a single time point. Village level measurements of tourism and market engagement were incorporated into a scale measuring tourism, healthcare, trail access, agriculture, and involvement in medicinal trade. Village level disease patterns were calculated from morbidity and mortality recalls collected since 2003. RESULTS There were no significant associations between infant weight for age z-score (WAZ), length for age z-score (LAZ), or weight-for-length for age z-score (WLZ) and village altitude, village economic development score, or engagement in tourism. Males had significantly higher LAZ, WAZ, and WLZ compared to females; only females showed a decline in LAZ with age. Triceps skinfold thickness z-score (ZTSF) was inversely associated with village level economic development score in male but not female infants; females ZTSF was positively associated with IYC age. CONCLUSIONS While overall size for age indices (WAZ, LAZ, WLZ) were not associated with altitude or village economic development in this population, ZTSF was inversely associated with village economic development in males but not females.
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Affiliation(s)
- Elizabeth A Quinn
- Department of Anthropology, Washington University in St. Louis, Saint Louis, Missouri, USA
| | - Geoff Childs
- Department of Anthropology, Washington University in St. Louis, Saint Louis, Missouri, USA
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21
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Leghi GE, Middleton PF, Netting MJ, Wlodek ME, Geddes DT, Muhlhausler BS. A Systematic Review of Collection and Analysis of Human Milk for Macronutrient Composition. J Nutr 2020; 150:1652-1670. [PMID: 32240307 DOI: 10.1093/jn/nxaa059] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/02/2020] [Accepted: 02/24/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND As human milk (HM) composition varies by time and across even a single feed, methods of sample collection can significantly affect the results of compositional analyses and complicate comparisons between studies. OBJECTIVE The aim was to compare the results obtained for HM macronutrient composition between studies utilizing different sampling methodologies. The results will be used as a basis to identify the most reliable HM sampling approach. METHODS EMBASE, MEDLINE/PubMed, Cochrane Library, Scopus, Web of Science, and ProQuest databases were searched for relevant articles. Observational and interventional studies were included, and at least 2 authors screened studies and undertook data extraction. Quality assessment was conducted using the Newcastle-Ottawa scale and previously published pragmatic score. RESULTS A total of 5301 publications were identified from our search, of which 101 studies were included (n = 5049 breastfeeding women). Methods used for HM collection were divided into 3 categories: collection of milk from all feeds over 24 h (32 studies, n = 1309 participants), collection at one time point (62 studies, n = 3432 participants), and "other methods" (7 studies, n = 308 participants). Fat and protein concentrations varied between collection methods within lactation stage, but there were no obvious differences in lactose concentrations. There was substantial variability between studies in other factors potentially impacting HM composition, including stage of lactation, gestational age, and analytical method, which complicated direct comparison of methods. CONCLUSIONS This review describes the first systematic evaluation of sampling methodologies used in studies reporting HM composition and highlights the wide range of collection methods applied in the field. This information provides an important basis for developing recommendations for best practices for HM collection for compositional analysis, which will ultimately allow combination of information from different studies and thus strengthen the body of evidence relating to contemporary HM composition. This trial was registered at PROSPERO as CRD42017072563, https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42017072563.
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Affiliation(s)
- Gabriela E Leghi
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia.,Women and Kids Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
| | - Philippa F Middleton
- Women and Kids Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
| | - Merryn J Netting
- Women and Kids Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia.,Discipline of Pediatrics, The University of Adelaide, Adelaide, Australia
| | - Mary E Wlodek
- Department of Physiology, The University of Melbourne, Melbourne, Australia
| | - Donna T Geddes
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Beverly S Muhlhausler
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia.,Commonwealth Scientific and Industrial Research Organization (CSIRO), Adelaide, Australia
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22
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Hoke MK. A biocultural examination of home food production and child growth in highland Peru. Am J Hum Biol 2020; 32:e23438. [PMID: 32459029 DOI: 10.1002/ajhb.23438] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES Chronic malnutrition remains a persistent global health issue. This mixed methods investigation in rural Peru examines the role of home food production (HFP) in reducing child malnutrition by testing the following hypotheses: (a) higher HFP will be associated with higher infant z-scores than those with less HFP and (b) infants with higher HFP will exhibit improved longitudinal growth outcomes across 6 months. METHODS Ethnographic methods include semi-structured interviews and participant observation. A household survey and anthropometric data were collected twice, from 86 infants under of 24 months old. A HFP index (HFI) was generated based on reports of animals for meat consumption, eggs, milk, and agricultural products for home consumption. Kruskal-Wallis tests were used to examine patterns of HFI and infant anthropometrics. Multivariate regressions were used to examine the relationships between HFP and infant height for age (HAZ), weight for age (WAZ), and triceps skinfold for age (TSAZ) in both rounds and 6-month change between rounds (6MΔ). RESULTS There were no relationships between HFI and infant z-scores in round one, however, HFI was significantly positively related to HAZ (B = 0.091, P < .039) in round two and with 6MΔ in HAZ (B = 0.09, P < .047). HFI did not predict WAZ or TSAZ in either round. CONCLUSIONS HFP represents an important influence of infant growth in Nuñoa, likely through nutritional improvement due to increased availability of animal-sourced foods and through contribution to household economy and maternal empowerment.
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Affiliation(s)
- Morgan K Hoke
- Department of Anthropology & Population Studies Center, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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23
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Schafrank LA, Washabaugh JR, Hoke MK. An examination of breastmilk composition among high altitude Peruvian women. Am J Hum Biol 2020; 32:e23412. [DOI: 10.1002/ajhb.23412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/09/2020] [Accepted: 02/25/2020] [Indexed: 12/25/2022] Open
Affiliation(s)
- Lauren A. Schafrank
- Department of Anthropology University of Pennsylvania Philadelphia Pennsylvania USA
| | | | - Morgan K. Hoke
- Department of Anthropology University of Pennsylvania Philadelphia Pennsylvania USA
- Population Studies Center University of Pennsylvania Philadelphia Pennsylvania USA
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24
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The Mother-Infant Nexus Revealed by Linear Enamel Hypoplasia: Chronological and Contextual Evaluation of Developmental Stress Using Incremental Microstructures of Enamel in Late/Final Jomon Period Hunter-Gatherers. THE MOTHER-INFANT NEXUS IN ANTHROPOLOGY 2020. [DOI: 10.1007/978-3-030-27393-4_4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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25
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Fujita M, Wander K, Paredes Ruvalcaba N, Brindle E. Human milk sIgA antibody in relation to maternal nutrition and infant vulnerability in northern Kenya. EVOLUTION MEDICINE AND PUBLIC HEALTH 2019; 2019:201-211. [PMID: 32405414 PMCID: PMC7216193 DOI: 10.1093/emph/eoz030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 11/09/2019] [Indexed: 12/11/2022]
Abstract
Background The maternal buffering hypothesis posits that human lactation biology can buffer milk against the mild-to-moderate malnutrition that occurred routinely in evolutionary history through the mobilization of maternal body reserves. This perspective may provide insights for understanding human milk immune content variation, such as milk sIgA, which protects infants’ intestines from microbial colonization and prevents diarrheal disease. Objective To investigate how maternal delivery of sIgA to milk may vary in a way that can buffer milk against maternal malnutrition, while taking into consideration infants’ varying needs for immune protection across age or by sex. Methodology A cross-sectional study analyzed archived milk specimens from breastfeeding mothers in Ariaal communities of northern Kenya surveyed during the 2006 Horn-of-Africa drought. Multiple regression models for ln-transformed sIgA were constructed using maternal nutrition, infant age/sex and their interactions as predictors. Maternal nutrition variables included iron-deficiency anemia (IDA), vitamin A deficiency (VAD) and mid-upper arm circumference (MUAC). Infant vulnerability was considered high in young age and/or male sex. Results and implications Milk sIgA did not significantly differ by maternal IDA. Milk sIgA increased with infant age and maternal MUAC (n = 202). Significant interactions were observed between infant age and maternal VAD and between infant sex and maternal MUAC, such that milk sIgA content was low for younger infants particularly among VAD mothers, while among mothers with low MUAC, sIgA was lower for male infants. Results imply that mothers’ ability to deliver/buffer milk sIgA may be lowered when nutritional stress is combined with high infant vulnerability to infection. Lay Summary Human milk sIgA antibody content was low for younger infants among vitamin A deficient mothers. Among mothers with small arm-circumference, milk sIgA was lower for sons. Double burden of raising young or male infants with high needs for immune protection and being malnourished, might lower maternal sIgA delivery to milk.
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Affiliation(s)
- Masako Fujita
- Department of Anthropology, Michigan State University, East Lansing, MI 48824, USA.,Biomarker Laboratory for Anthropological Research, Michigan State University, East Lansing, MI 48824, USA
| | - Katherine Wander
- Department of Anthropology, Binghamton University (SUNY), Binghamton, NY, USA.,Laboratory for Anthropometry and Biomarkers, Binghamton University, Binghamton, NY, USA
| | - Nerli Paredes Ruvalcaba
- Department of Anthropology, Michigan State University, East Lansing, MI 48824, USA.,Biomarker Laboratory for Anthropological Research, Michigan State University, East Lansing, MI 48824, USA
| | - Eleanor Brindle
- Center for Studies in Demography and Ecology, University of Washington, Seattle, WA, USA
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26
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Corbitt M, Paredes Ruvalcaba N, Fujita M. Variation in breast milk macronutrient contents by maternal anemia and hemoglobin concentration in northern Kenya. Am J Hum Biol 2019; 31:e23238. [PMID: 30908793 DOI: 10.1002/ajhb.23238] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 01/23/2019] [Accepted: 03/09/2019] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVES This study explored differing levels of macronutrients in breast milk in relation to maternal anemia and hemoglobin. METHODS Archived milk specimens and data from a cross-sectional sample of 208 breastfeeding mothers in northern Kenya, originally collected in 2006, were analyzed; data included milk fat, maternal hemoglobin concentration, and anemia status (anemia defined as hemoglobin <12 g/dL). Total protein and lactose were measured and energy was calculated. To explore the association between milk outcomes (fat, protein, lactose, and energy) and anemia, regression models were constructed with and without adjustment for maternal age, parity, and time (days) postpartum. The same models were constructed using hemoglobin as a continuous predictor in lieu of dichotomous anemia to explore the role of hemoglobin levels and anemia severity in predicting milk outcomes. RESULTS The group comparison indicated significantly higher milk protein and lower milk fat for anemic mothers relative to nonanemic counterparts. After adjustment for maternal age, parity, and time postpartum, maternal anemia was associated with significantly higher milk protein (P = 0.001) and significantly lower milk fat (P = 0.025). Hemoglobin had a significant inverse relationship with milk protein (P = 0.017) and a marginally significant positive relationship with milk fat (P = 0.060) after adjusting for the maternal variables. Neither anemia nor hemoglobin was significant in predicting lactose or milk energy. CONCLUSIONS Maternal anemia and hemoglobin concentration may be associated with complex changes in milk macronutrients. Future research should clarify the impact of maternal anemia on a range of breast milk components while accounting for other maternal characteristics.
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Affiliation(s)
- Mary Corbitt
- Department of Anthropology, Michigan State University, East Lansing, Michigan.,Biomarker Laboratory for Anthropological Research, Michigan State University, East Lansing, Michigan
| | - Nerli Paredes Ruvalcaba
- Department of Anthropology, Michigan State University, East Lansing, Michigan.,Biomarker Laboratory for Anthropological Research, Michigan State University, East Lansing, Michigan
| | - Masako Fujita
- Department of Anthropology, Michigan State University, East Lansing, Michigan.,Biomarker Laboratory for Anthropological Research, Michigan State University, East Lansing, Michigan
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27
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Fujita M, Ruvalcaba NP, Wander K, Corbitt M, Brindle E. Buffered or impaired: Maternal anemia, inflammation and breast milk macronutrients in northern Kenya. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 168:329-339. [PMID: 30575959 PMCID: PMC6352968 DOI: 10.1002/ajpa.23752] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 09/25/2018] [Accepted: 10/25/2018] [Indexed: 01/08/2023]
Abstract
BACKGROUND Maternal anemia has adverse consequences for the mother-infant dyad. To evaluate whether and how milk nutrient content may change in ways that could "buffer" infants against the conditions underlying maternal anemia, this study assessed associations between milk macronutrients and maternal iron-deficiency anemia (IDA), non-iron-deficiency anemia (NIDA), and inflammation. METHODS A secondary analysis of cross-sectional data and milk from northern Kenya was conducted (n = 204). The combination of hemoglobin and transferrin receptor defined IDA/NIDA. Elevated serum C-reactive protein defined acute inflammation. The effects of IDA, NIDA, and inflammation on milk macronutrients were evaluated in regression models. RESULTS IDA (β = 0.077, p = .022) and NIDA (β = 0.083, p = .100) predicted higher total protein (ln). IDA (β = -0.293, p = .002), NIDA (β = -0.313, p = .047), and inflammation (β = -0.269, p = .007) each predicted lower fat (ln); however, anemia accompanying inflammation predicted higher fat (β = 0.655, p = .007 for IDA and β = 0.468, p = .092 for NIDA). NIDA predicted higher lactose (β = 1.020, p = .003). CONCLUSIONS Milk macronutrient content both increases and decreases in the presence of maternal anemia and inflammation, suggesting a more complicated and dynamic change than simple impairment of nutrient delivery during maternal stress. Maternal fat delivery to milk may be impaired under anemia. Mothers may buffer infant nutrition against adverse conditions or poor maternal health by elevating milk protein (mothers with IDA/NIDA), lactose (mothers with NIDA), or fat (mothers with anemia and inflammation). This study demonstrates the foundational importance of maternal micronutrient health and inflammation or infection for advancing the ecological understanding of human milk nutrient variation.
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Affiliation(s)
- Masako Fujita
- Department of Anthropology, Michigan State University
- Biomarker Laboratory for Anthropological Research, Michigan State University
| | - Nerli Paredes Ruvalcaba
- Department of Anthropology, Michigan State University
- Biomarker Laboratory for Anthropological Research, Michigan State University
| | - Katherine Wander
- Department of Anthropology, Binghamton University (SUNY)
- Laboratory for Anthropometry and Biomarkers, Binghamton University (SUNY)
| | - Mary Corbitt
- Department of Anthropology, Michigan State University
- Biomarker Laboratory for Anthropological Research, Michigan State University
| | - Eleanor Brindle
- Center for Studies in Demography and Ecology, University of Washington
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28
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Klein LD, Huang J, Quinn EA, Martin MA, Breakey AA, Gurven M, Kaplan H, Valeggia C, Jasienska G, Scelza B, Lebrilla CB, Hinde K. Variation among populations in the immune protein composition of mother's milk reflects subsistence pattern. Evol Med Public Health 2018; 2018:230-245. [PMID: 30430010 PMCID: PMC6222208 DOI: 10.1093/emph/eoy031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 09/25/2018] [Indexed: 12/29/2022] Open
Abstract
LAY SUMMARY Adaptive immune proteins in mothers' milk are more variable than innate immune proteins across populations and subsistence strategies. These results suggest that the immune defenses in milk are shaped by a mother's environment throughout her life. BACKGROUND AND OBJECTIVES Mother's milk contains immune proteins that play critical roles in protecting the infant from infection and priming the infant's developing immune system during early life. The composition of these molecules in milk, particularly the acquired immune proteins, is thought to reflect a mother's immunological exposures throughout her life. In this study, we examine the composition of innate and acquired immune proteins in milk across seven populations with diverse disease and cultural ecologies. METHODOLOGY Milk samples (n = 164) were collected in Argentina, Bolivia, Nepal, Namibia, Philippines, Poland and the USA. Populations were classified as having one of four subsistence patterns: urban-industrialism, rural-shop, horticulturalist-forager or agro-pastoralism. Milk innate (lactalbumin, lactoferrin and lysozyme) and acquired (Secretory IgA, IgG and IgM) protein concentrations were determined using triple-quadrupole mass spectrometry. RESULTS Both innate and acquired immune protein composition in milk varied among populations, though the acquired immune protein composition of milk differed more among populations. Populations living in closer geographic proximity or having similar subsistence strategies (e.g. agro-pastoralists from Nepal and Namibia) had more similar milk immune protein compositions. Agro-pastoralists had different milk innate immune protein composition from horticulturalist-foragers and urban-industrialists. Acquired immune protein composition differed among all subsistence strategies except horticulturist-foragers and rural-shop. CONCLUSIONS AND IMPLICATIONS Our results reveal fundamental variation in milk composition that has not been previously explored in human milk research. Further study is needed to understand what specific aspects of the local environment influence milk composition and the effects this variation may have on infant health outcomes.
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Affiliation(s)
- Laura D Klein
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA, USA
- Department of Anthropology, University of Illinois at Chicago, 1007 West Harrison Street, Chicago IL, USA
| | - Jincui Huang
- Chemistry Department, University of California Davis, 2465 Chemistry Annex, One Shields Avenue, Davis, CA, USA
| | - Elizabeth A Quinn
- Department of Anthropology, Washington University in St Louis, Campus Box 1114, One Brookings Drive, St Louis, MO, USA
| | - Melanie A Martin
- Department of Anthropology, University of California Santa Barbara, Santa Barbara, CA, USA
- Department of Anthropology, University of Washington, 314 Denny Hall, Box 353100, Seattle, WA, USA
| | - Alicia A Breakey
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA, USA
| | - Michael Gurven
- Department of Anthropology, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Hillard Kaplan
- Department of Anthropology, University of New Mexico, MSC01-1040, 1 University of New Mexico, Albuquerque, NM, USA
| | - Claudia Valeggia
- Department of Anthropology, Yale University, 10 Sachem Street, New Haven, CT, USA
| | - Grazyna Jasienska
- Department of Environmental Health, Faculty of Health Sciences, Jagiellonian University Medical College, ul. Grzegorzecka 20, Krakow, Poland
| | - Brooke Scelza
- Department of Anthropology, University of California Los Angeles, 341 Haines Hall, Box 951553, Los Angeles, CA, USA
| | - Carlito B Lebrilla
- Chemistry Department, University of California Davis, 2465 Chemistry Annex, One Shields Avenue, Davis, CA, USA
| | - Katie Hinde
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA, USA
- School of Human Evolution and Social Change
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ, USA
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29
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Bzikowska-Jura A, Czerwonogrodzka-Senczyna A, Olędzka G, Szostak-Węgierek D, Weker H, Wesołowska A. Maternal Nutrition and Body Composition During Breastfeeding: Association with Human Milk Composition. Nutrients 2018; 10:E1379. [PMID: 30262786 PMCID: PMC6213543 DOI: 10.3390/nu10101379] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/19/2018] [Accepted: 09/25/2018] [Indexed: 12/14/2022] Open
Abstract
The composition of human milk is dynamic and can vary according to many maternal factors, such as diet and nutritional status. This study investigated the association of maternal nutrition and body composition with human milk composition. All measurements and analyses were done at three time points: during the first (n = 40), third (n = 22), and sixth (n = 15) month of lactation. Human milk was analyzed using the Miris human milk analyzer (HMA), body composition was measured with bioelectrical bioimpedance (BIA) using a Maltron BioScan 920-II, and the assessment of women's nutrition was based on a three-day dietary record. The correlation coefficient (Pearson's r) did not show a significant statistical relationship between human milk composition and nutrients in women's diet at three time points. For women in the third month postpartum, we observed moderate to strong significant correlations (r ranged from 0.47 to 0.64) between total protein content in milk and the majority of body composition measures as follows: positive correlations: % fat mass (r = 0.60; p = 0.003), fat-free mass expressed in kg (r = 0.63; p = 0.001), and muscle mass (r = 0.47; p = 0.027); and negative correlation: % total body water (r = -0.60; p = 0.003). The variance in milk fat content was related to the body mass index (BMI), with a significant positive correlation in the first month postpartum (r = 0.33; p = 0.048). These findings suggest that it is not diet, but rather the maternal body composition that may be associated with the nutritional value of human milk.
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Affiliation(s)
- Agnieszka Bzikowska-Jura
- Department of Clinical Dietetics, Faculty of Health Science, Medical University of Warsaw, E Ciolka Str. 27, 01-445 Warsaw, Poland.
| | - Aneta Czerwonogrodzka-Senczyna
- Department of Clinical Dietetics, Faculty of Health Science, Medical University of Warsaw, E Ciolka Str. 27, 01-445 Warsaw, Poland.
| | - Gabriela Olędzka
- Department of Medical Biology, Faculty of Health Science, Medical University of Warsaw, Nowogrodzka Str. 73, 02-018 Warsaw, Poland.
| | - Dorota Szostak-Węgierek
- Department of Clinical Dietetics, Faculty of Health Science, Medical University of Warsaw, E Ciolka Str. 27, 01-445 Warsaw, Poland.
| | - Halina Weker
- Department of Clinical Dietetics, Faculty of Health Science, Medical University of Warsaw, E Ciolka Str. 27, 01-445 Warsaw, Poland.
| | - Aleksandra Wesołowska
- Laboratory of Human Milk and Lactation Research at Regional Human Milk Bank in Holy Family Hospital, Faculty of Health Science, Department of Neonatology, Medical University of Warsaw, Zwirki i Wigury Str. 63A, 02-091 Warsaw, Poland.
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30
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Sarma MS, Gettler LT, Childs G, Quinn EA. When women work: Endocrine reactivity in women during everyday physical activity at high altitude. Am J Hum Biol 2018; 30:e23154. [DOI: 10.1002/ajhb.23154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 03/14/2018] [Accepted: 06/03/2018] [Indexed: 11/07/2022] Open
Affiliation(s)
- Mallika S Sarma
- Department of Anthropology University of Notre Dame Notre Dame Indiana
| | - Lee T Gettler
- Department of Anthropology University of Notre Dame Notre Dame Indiana
- The Eck Institute for Global Health, University of Notre Dame Notre Dame Indiana
| | - Geoff Childs
- Department of Anthropology Washington University St. Louis Missouri
| | - Elizabeth A Quinn
- Department of Anthropology Washington University St. Louis Missouri
- Institute for Public Health, Washington University School of Medicine St. Louis Missouri
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31
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Dufour DL, Piperata BA. Reflections on nutrition in biological anthropology. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 165:855-864. [DOI: 10.1002/ajpa.23370] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 11/17/2017] [Accepted: 11/20/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Darna L. Dufour
- Department of Anthropology, University of Colorado Boulder; Boulder Colorado 80309
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32
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Pittet F, Johnson C, Hinde K. Age at reproductive debut: Developmental predictors and consequences for lactation, infant mass, and subsequent reproduction in rhesus macaques (Macaca mulatta). AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2017; 164:457-476. [PMID: 28895116 PMCID: PMC5759967 DOI: 10.1002/ajpa.23286] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 11/07/2022]
Abstract
OBJECTIVES The age at which females initiate their reproductive career is a critical life-history parameter with potential consequences on their residual reproductive value and lifetime fitness. The age at reproductive debut may be intimately tied to the somatic capacity of the mother to rear her young, but relatively little is known about the influence of age of first birth on milk synthesis within a broader framework of reproductive scheduling, infant outcomes, and other life-history tradeoffs. MATERIAL AND METHODS Our study investigated the predictors of age at first reproduction among 108 captive rhesus macaque (Macaca mulatta) females, and associations with their milk synthesis at peak lactation, infant mass, and ability to subsequently conceive and reproduce. RESULTS The majority of females reproduced in their fourth year (typical breeders); far fewer initiated their reproductive career one year earlier or one year later (respectively early and late breeders). Early breeders (3-year-old) benefited from highly favorable early life development (better juvenile growth, high dominance rank) to accelerate reproduction, but were impaired in milk synthesis due to lower somatic resources and their own continued growth. Comparatively, late breeders suffered from poor developmental conditions, only partially compensated by their delayed reproduction, and evinced compromised milk synthesis. Typical breeders not only produced higher available milk energy but also had best reproductive performance during the breeding and birth seasons following primiparity. DISCUSSION Here, we refine and extend our understanding of how life-history tradeoffs manifest in the magnitude, sources, and consequences of variation in age of reproductive debut. These findings provide insight into primate reproductive flexibility in the context of constraints and opportunities.
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Affiliation(s)
- Florent Pittet
- Brain, Mind, and Behavior Unit, California National Primate Research Center
- Center for Evolution and Medicine, Arizona State University
- School for Human Evolution and Social Change, Arizona State University
| | | | - Katie Hinde
- Brain, Mind, and Behavior Unit, California National Primate Research Center
- Center for Evolution and Medicine, Arizona State University
- School for Human Evolution and Social Change, Arizona State University
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33
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Nelson RG. Reimaging Process in 2016: Deliberations on a Year of Integrative Slow Science in Biological Anthropology. AMERICAN ANTHROPOLOGIST 2017. [DOI: 10.1111/aman.12869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Robin G. Nelson
- Department of Anthropology; Santa Clara University; Santa Clara CA 95053
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34
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Quinn EA, Childs G. Ecological pressures and milk metabolic hormones of ethnic Tibetans living at different altitudes. Ann Hum Biol 2016; 44:34-45. [DOI: 10.3109/03014460.2016.1153144] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Elizabeth A. Quinn
- Department of Anthropology, Washington University in St. Louis, St. Louis, MO, USA
| | - Geoff Childs
- Department of Anthropology, Washington University in St. Louis, St. Louis, MO, USA
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35
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Bernstein RM, Hinde K. Bioactive factors in milk across lactation: Maternal effects and influence on infant growth in rhesus macaques (Macaca mulatta). Am J Primatol 2016; 78:838-50. [PMID: 27029025 DOI: 10.1002/ajp.22544] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 02/23/2016] [Accepted: 02/25/2016] [Indexed: 12/31/2022]
Abstract
Among mammals, numerous bioactive factors in milk vary across mothers and influence offspring outcomes. This emerging area of research has primarily investigated such dynamics within rodent biomedical models, domesticated dairy breeds, and among humans in clinical contexts. Less understood are signaling factors in the milk of non-human primates. Here, we report on multiple bioactive components in rhesus macaque (Macaca mulatta) milk and their associations with maternal and infant characteristics. Milk samples were collected from 59 macaques at multiple time points across lactation in conjunction with maternal and infant morphometrics and life-history animal records. Milk was assayed for adiponectin (APN), epidermal growth factor (EGF) and its receptor (EGF-R), and transforming growth factor beta 2 (TGF-β2 ). Regression models were constructed to assess the contributions of maternal factors on variation in milk bioactives, and on the relationship of this variation to infant body mass and growth. Maternal body mass, parity, social rank, and infant sex were all predictive of concentrations of milk bioactives. Primiparous mothers produced milk with higher adiponectin, but lower EGF, than multiparous mothers. Heavier mothers produced milk with lower EGF and EGF-R, but higher TGF-β2 . Mothers of daughters produced milk with higher TGF-β2 . Mid-ranking mothers produced milk with higher mean EGF and adiponectin concentrations than low-ranking mothers. Milk EGF and EGF-R were positively associated with infant body mass and growth rate. Importantly, these signaling bioactives (APN, EGF, EGF-R, and TGF-β2 ) were significantly correlated with nutritional values of milk. The effects of milk signals remained after controlling for the available energy in milk revealing the added physiological role of non-nutritive milk bioactives in the developing infant. Integrating analyses of energetic and other bioactive components of milk yields an important perspective for interpreting the magnitude, sources, and consequences of inter-individual variation in milk synthesis. Am. J. Primatol. 78:838-850, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Robin M Bernstein
- Department of Anthropology, University of Colorado Boulder, Boulder, Colorado.,Health and Society Program, Institute of Behavioral Science, University of Colorado Boulder, Boulder, Colorado
| | - Katie Hinde
- School of Human Evolution and Social Change, Arizona State University, Arizona.,Center for Evolution and Medicine, Arizona State University, Arizona.,Brain, Mind, and Behavior Unit, California National Primate Research Center, California
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