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Weiler M, Hertzler SR, Dvoretskiy S. Is It Time to Reconsider the U.S. Recommendations for Dietary Protein and Amino Acid Intake? Nutrients 2023; 15:838. [PMID: 36839196 PMCID: PMC9963165 DOI: 10.3390/nu15040838] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/06/2023] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
Since the U.S. Institute of Medicine's recommendations on protein and amino acid intake in 2005, new information supports the need to re-evaluate these recommendations. New lines of evidence include: (1) re-analysis/re-interpretation of nitrogen balance data; (2) results from indicator amino acid oxidation studies; (3) studies of positive functional outcomes associated with protein intakes higher than recommended; (4) dietary guidance and protein recommendations from some professional nutrition societies; and (5) recognition that the synthesis of certain dispensable amino acids may be insufficient to meet physiological requirements more often than previously understood. The empirical estimates, theoretical calculations and clinical functional outcomes converge on a similar theme, that recommendations for intake of protein and some amino acids may be too low in several populations, including for older adults (≥65 years), pregnant and lactating women, and healthy children older than 3 years. Additional influential factors that should be considered are protein quality that meets operational sufficiency (adequate intake to support healthy functional outcomes), interactions between protein and energy intake, and functional roles of amino acids which could impact the pool of available amino acids for use in protein synthesis. Going forward, the definition of "adequacy" as it pertains to protein and amino acid intake recommendations must take into consideration these critical factors.
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Affiliation(s)
- Mary Weiler
- Scientific and Medical Affairs, Abbott Nutrition, 2900 Easton Square Place, Columbus, OH 43219, USA
| | - Steven R. Hertzler
- Scientific and Medical Affairs, Abbott Nutrition, 2900 Easton Square Place, Columbus, OH 43219, USA
| | - Svyatoslav Dvoretskiy
- Department of Kinesiology and Community Health, University of Illinois, Urbana-Champaign, IL 61801, USA
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2
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Légeret C, Lohmann C, Pedrini L, Sarbach L, Furlano R, Köhler H. Use of Health-Promoting Food and Supplements in Swiss Children. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9121842. [PMID: 36553285 PMCID: PMC9776924 DOI: 10.3390/children9121842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Our diet is the sum of many different influences and has visibly changed over the past decades. Since children also imitate their parents when it comes to eating habits, the aim of the study was to assess the current dietary habits in Swiss children. METHOD Cross-sectional study of children between 0 and 18 years of age in Switzerland. RESULTS A total of 1964 children participated, with an average age of 7.4 years. A total of 57.9% of participants stated to buy supplements to promote health, while fruit juices/smoothies were the most popular product (42.5%), followed by protein-enriched products (40%) and vitamins/minerals (29%). A statistically significant correlation between longer screen time, a higher socioeconomic background, and the intake of supplements was found. Over 20% of all families regularly consume plant-based drinks. DISCUSSION This Swiss cross-sectional study of over 1900 participants reveals that 58% of all participants buy supplements or special kid's food to promote the child's health. There is a correlation between higher screen time, higher parental income, and the usage of supplements. A total of 23% of participating families consume at least one plant-based drink on a regular basis. As more and more families use supplements, the pediatrician should not only focus on weight, which reflects the intake of macronutrients but should also take a history of whether children omit certain foods or take supplements to ensure the child does not have a deficiency of micronutrients.
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Affiliation(s)
- Corinne Légeret
- University Children’s Hospital Basel, Spitalstrasse 33, 4056 Basel, Switzerland
- Correspondence:
| | - Clarissa Lohmann
- Children’s Hospital of Aarau, Tellstrasse 25, 5001 Aarau, Switzerland
| | - Laura Pedrini
- Medical Faculty, University of Basel, 4001 Basel, Switzerland
| | - Laurin Sarbach
- Medical Faculty, University of Basel, 4001 Basel, Switzerland
| | - Raoul Furlano
- University Children’s Hospital Basel, Spitalstrasse 33, 4056 Basel, Switzerland
| | - Henrik Köhler
- Children’s Hospital of Aarau, Tellstrasse 25, 5001 Aarau, Switzerland
- Medical Faculty, University of Basel, 4001 Basel, Switzerland
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Kaur C, Singh A, Sethi M, Devi V, Chaudhary DP, Phagna RK, Langyan S, Bhushan B, Rakshit S. Optimization of Protein Quality Assay in Normal, opaque-2, and Quality Protein Maize. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.743019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The development of quality protein maize (QPM) was considered a significant leap toward improvement in the nutritional status of rural masses in developing countries. The nutritional quality of QPM is attributed to the higher concentration of essential amino acids, particularly lysine and tryptophan, in its kernel endosperm. However, the similarity in the grains of QPM and normal maize necessitates the development of a standard protocol to assess the protein quality of maize. The present study aimed at improving the protocol of protein quality assessment in QPM. For this purpose, endosperm defatting and protein estimation procedures were restandardized and optimized with respect to the protocol duration and its amenability for high-throughput analysis. Unlike normal maize, QPM and opaque-2 mutants were completely defatted within a 48 h period. It was observed that the tryptophan content, calculated at each defatting interval, increased in the samples defatted for a longer duration. No significant differences were observed in the tryptophan content analyzed in the samples defatted for 48 and 72 h. Moreover, the endosperm protein estimated by using the Bradford method with certain modifications strongly correlated with the micro-Kjeldahl method (r = 0.9). Relative to the micro-Kjeldahl method, the Bradford method was found to be precise, rapid, and hazard-free. The present findings enable a testing protocol of reduced time duration that can be used in resource-poor settings for the determination of a protein quality assay in QPM. Overall, the present study effectively helped in reducing the defatting time by 24 h and protein estimation by 3 h as compared to the already established International Maize and Wheat Improvement Center protocol. This is expected to enable the aggregation of high-protein-quality maize to facilitate its commercialization.
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Parikh P, Semba R, Manary M, Swaminathan S, Udomkesmalee E, Bos R, Poh BK, Rojroongwasinkul N, Geurts J, Sekartini R, Nga TT. Animal source foods, rich in essential amino acids, are important for linear growth and development of young children in low- and middle-income countries. MATERNAL AND CHILD NUTRITION 2021; 18:e13264. [PMID: 34467645 PMCID: PMC8710096 DOI: 10.1111/mcn.13264] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 07/02/2021] [Accepted: 08/02/2021] [Indexed: 11/28/2022]
Abstract
Growth faltering under 5 years of age is unacceptably high worldwide, and even more children, while not stunted, fail to reach their growth potential. The time between conception and 2 years of age is critical for development. The period from 6 to 23 months, when complementary foods are introduced, coincides with a time when growth faltering and delayed neurocognitive developments are most common. Fortunately, this is also the period when diet exercises its greatest influence. Growing up in an adverse environment, with a deficient diet, as typically seen in low‐ and middle‐income countries (LMICs), hampers growth and development of children and prevents them from realising their full developmental and economic future potential. Sufficient nutrient availability and utilisation are paramount to a child's growth and development trajectory, especially in the period after breastfeeding. This review highlights the importance of essential amino acids (EAAs) in early life for linear growth and, likely, neurocognitive development. The paper further discusses signalling through mammalian target of rapamycin complex 1 (mTORC1) as one of the main amino acid (AA)‐sensing hubs and the master regulator of both growth and neurocognitive development. Children in LMICs, despite consuming sufficient total protein, do not meet their EAA requirements due to poor diet diversity and low‐quality dietary protein. AA deficiencies in early life can cause reductions in linear growth and cognition. Ensuring AA adequacy in diets, particularly through inclusion of nutrient‐dense animal source foods from 6 to 23 months, is strongly encouraged in LMICs in order to compensate for less than optimal growth during complementary feeding.
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Affiliation(s)
| | - Richard Semba
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mark Manary
- Department of Paediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sumathi Swaminathan
- St John's Research Institute, St John's National Academy of Health Sciences, Bangalore, Karnataka, India
| | | | - Rolf Bos
- FrieslandCampina, Amersfoort, The Netherlands
| | - Bee Koon Poh
- Nutritional Sciences Programme & Centre for Community Health, Faculty of Health Sciences, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | | | - Jan Geurts
- FrieslandCampina, Amersfoort, The Netherlands
| | - Rini Sekartini
- Faculty of Medicine, Department of Pediatrics, University of Indonesia and Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - Tran Thuy Nga
- Department of Occupational and School Nutrition, National Institute of Nutrition (NIN), Hanoi, Vietnam
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5
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Donato K, McConnell M, Han D, Gunaratna NS, Tessema M, De Groote H, Cohen J. Behavioural insights to support increased consumption of quality protein maize by young children: a cluster randomised trial in Ethiopia. BMJ Glob Health 2021; 5:bmjgh-2020-002705. [PMID: 33355261 PMCID: PMC7751204 DOI: 10.1136/bmjgh-2020-002705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/04/2020] [Accepted: 10/20/2020] [Indexed: 12/23/2022] Open
Abstract
Introduction Biofortified crops have tremendous potential to improve child nutrition. We tested whether complementing the distribution of quality protein maize (QPM) with a package of interventions informed by behavioural insights could support greater consumption of QPM by young children and translate into improved growth. Methods We conducted a cluster-randomised trial in Oromia, Ethiopia. Clusters of households with a child between 6 and 35 months were randomised into an arm receiving QPM seed only (320 households, 203 clusters) or an arm receiving QPM seed and a child consumption targeting intervention (290 households, 183 clusters). The intervention package included tools to help caregivers keep QPM separate from conventional maize and to earmark QPM specifically for child consumption, as well as encouragement regarding cooking QPM specifically for young children. We analysed the impact of the intervention on food storage, cooking and consumption behaviours and on anthropometric measures (weight-for-age, height-for-age z scores). Results The consumption targeting intervention increased the probability of child consumption of QPM in the past week by 17.3 percentage points (pp) (95% CI 9.4 pp to 25.1 pp; p<0.01), increased the probability that QPM flour was stored separately from conventional maize by 46.5 pp (95% CI 38.3 pp to 54.7 pp; p<0.01) and increased the probability that caregivers cooked QPM specifically for young children in the past week by 14.4 pp (95% CI 7.9 pp to 20.9 pp; p<0.01). These effects persisted, but were attenuated, 10 months postintervention. No significant effects on anthropometric outcomes were found. Conclusions Enhancing the distribution of new, biofortified crop varieties with a consumption targeting campaign can change storage, cooking and consumption behaviours. However, these improved behaviours did not translate into increased growth in this setting. Trial registration number NCT02710760 and AEARCTR0000786.
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Affiliation(s)
| | - Margaret McConnell
- Global Health and Population, Harvard University T H Chan School of Public Health, Boston, Massachusetts, USA
| | - Dan Han
- Lee Kuan Yew School of Public Policy, National University of Singapore, Singapore
| | | | - Masresha Tessema
- Ethiopian Public Health Institute, Addis Ababa, Oromia, Ethiopia
| | | | - Jessica Cohen
- Global Health and Population, Harvard University T H Chan School of Public Health, Boston, Massachusetts, USA
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Lutter CK, Grummer-Strawn L, Rogers L. Complementary feeding of infants and young children 6 to 23 months of age. Nutr Rev 2021; 79:825-846. [PMID: 33684940 DOI: 10.1093/nutrit/nuaa143] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Complementary feeding, when foods are introduced to complement a milk-based diet, generally occurs between 6 and 23 months of age. It is a critical period for both physical and cognitive development. During this period, the growth rate of the brain is one of the fastest during the life span and, consequently, the timing, dose, and duration of exposure to specific nutrients can result in both positive and negative effects. Complementary feeding is more than ensuring an adequate intake of nutrients; it also is about avoiding excess intakes of calories, salt, sugars, and unhealthy fats. Meals are cultural and social events where young children observe, imitate, learn about foods to like or dislike, and form lifelong eating habits and practices. Meals are also when a child learns to touch foods and connect food tastes to how foods look and feel. Ideally, complementary feeding is responsive and promotes child autonomy, but it can also be used to manage behavior problems or overly indulge a child, resulting in long-term consequences for nutrition and health. Therefore, in addition to what a child is fed, attention to how a child is fed is also important. In this review, 12 topics relevant for updating global guidance on complementary feeding were identified: age of introduction of complementary foods; continued breastfeeding; responsive feeding; safe preparation and storage of complementary foods; food textures, flavors, and acceptance; energy and meal and snack frequency; fats, protein, and carbohydrates; dietary diversity; milks other than breast milk; fluid needs; unhealthy foods and beverages; and use of vitamin and mineral supplements or supplementary foods.
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Affiliation(s)
- Chessa K Lutter
- Division of Food Security and Agriculture, RTI International, Washington, DC, USA
| | | | - Lisa Rogers
- Department of Nutrition and Food Safety, World Health Organization, Geneva, Switzerland
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De Sanctis V, Soliman A, Alaaraj N, Ahmed S, Alyafei F, Hamed N. Early and Long-term Consequences of Nutritional Stunting: From Childhood to Adulthood. ACTA BIO-MEDICA : ATENEI PARMENSIS 2021; 92:e2021168. [PMID: 33682846 PMCID: PMC7975963 DOI: 10.23750/abm.v92i1.11346] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 02/15/2021] [Indexed: 01/30/2023]
Abstract
Linear growth failure (stunting) in childhood is the most prevalent form of undernutrition globally. The debate continues as to whether children who become stunted before age 24 months can catch up in growth and cognitive functions later in their lives. The potentially irreparable physical and neurocognitive damage that accompanies stunted growth is a major obstacle to human development. This review aims at evaluation and summarizing the published research covering the different aspects of stunting from childhood to adulthood.
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Affiliation(s)
| | - Ashraf Soliman
- Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar.
| | - Nada Alaaraj
- Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar.
| | - Shayma Ahmed
- Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar.
| | - Fawziya Alyafei
- Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar.
| | - Noor Hamed
- Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar.
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Bandyopadhyay S, Shivakumar N, Kurpad AV. Protein intakes of pregnant women and children in India-protein quality implications. MATERNAL & CHILD NUTRITION 2020; 16 Suppl 3:e12952. [PMID: 33347716 PMCID: PMC7752127 DOI: 10.1111/mcn.12952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/25/2019] [Accepted: 12/29/2019] [Indexed: 11/28/2022]
Abstract
The recent National Family Health Survey (NFHS-4, 2016) reports a national average of 18% for low birthweight (LBW) and 38% for stunting in children <5 years. Nutrition and environmental influences (chronic enteric pathogenic exposure through poor water, sanitation, and hygiene) are two critical factors that impact the health outcomes of the populxation. This is particularly relevant for vulnerable age groups such as pregnant women and children <5 years, who bear long-lasting and intergenerational consequences of impoverished nutrition and suboptimal living conditions. The present review provides, for the first time, an analysis of indispensable amino acid (IAA) requirements for pregnant women, separately for the second and third trimesters, using protein accretion data from a recent Indian study. Furthermore, using these estimates for pregnancy, and the current IAA requirements for young children, the quality of protein was assessed in Indian diets consumed by pregnant women and children (1-3 and 4-6 years) from national representative rural National Nutrition Monitoring Bureau survey. The assessment was considered in the context of an adverse environment and in relation to outcomes such as LBW, stunting, and underweight. Finally, an assessment was made of the proportion of the surveyed population at risk of dietary quality protein inadequacy and implications for planning nutrition intervention programmes. Specifically, state-wise estimates of the risk of quality protein inadequacy are provided, in addition to evaluations of additional dietary supplementation, which could inform the policy of supplementary nutrition programmes to improve health outcomes.
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Affiliation(s)
- Sulagna Bandyopadhyay
- Division of Nutrition, St. John's Research InstituteSt. John's National Academy of Health SciencesSarjapur Road, Bangalore560034India
| | - Nirupama Shivakumar
- Division of Nutrition, St. John's Research InstituteSt. John's National Academy of Health SciencesSarjapur Road, Bangalore560034India
| | - Anura V. Kurpad
- Division of Nutrition, St. John's Research InstituteSt. John's National Academy of Health SciencesSarjapur Road, Bangalore560034India
- Department of Physiology, St. John's Medical CollegeSt. John's National Academy of Health SciencesSarjapur Road, Bangalore560034India
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9
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Kittisakmontri K, Lanigan J, Wells JCK, Fewtrell M. The Impact of Dietary Protein in Complementary Foods on Infant Growth and Body Composition in a Population Facing the Double Burden of Malnutrition: Protocol for a Multicenter, Prospective Cohort Study. JMIR Res Protoc 2020; 9:e18112. [PMID: 32940616 PMCID: PMC7530688 DOI: 10.2196/18112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Protein is an essential macronutrient with an important role during complementary feeding. Low protein intake contributes to undernutrition while high intake, especially from animal sources, may increase obesity risk. However, the influences of different protein sources (dairy, meat, and plants) on growth, and underlying mechanisms for these effects, are poorly understood. Animal-sourced foods provide both high-quality protein and iron and are recommended to improve iron status. However, it is unclear whether current dietary recommendations are adequate to support healthy growth and optimize iron status. These issues are of particular concern in countries facing the double burden of malnutrition, the coexistence of all forms of malnutrition. More evidence is needed to develop appropriate recommendations for these countries. OBJECTIVE This study will investigate associations between protein intake during complementary feeding and growth, body composition, and iron status of infants in Thailand, a country facing the double burden of malnutrition. The study will also explore how different protein sources influence growth via the growth hormone-insulin-like growth factor I (IGF-1) axis and plasma amino acids. METHODS A multicenter cohort study will be conducted in Chiang Mai, Thailand, in 150 healthy term infants aged 4-6 months with birth weight ≥2500 g. Demographic data, dietary intake, and anthropometry will be collected at 6, 9, and 12 months. Dietary intake will be assessed using 24-hour dietary recalls, 3-day food records, and food frequency questionnaires. Blood samples for iron status, growth hormone, IGF-1, insulin-like growth factor-binding protein III (IGFBP-3), and plasma amino acids and urine samples for body composition analysis using stable isotope dilution will be obtained at 12 months. RESULTS The recruitment of study participants and data collection was undertaken from June 2018 to May 2019. Data and laboratory analyses are ongoing and are expected to be completed by December 2020. A total of 150 participants were enrolled, and 146 completed the study. We hypothesized that protein intake from animal-sourced foods in recommended quantities could support normal weight and length gain and lower the risk of undernutrition associated with similar amounts of plant-based protein. However, higher protein intake, especially from milk protein, may be linked to increased body fat via plasma amino acids and the growth hormone-IGF axis. CONCLUSIONS The results of this study will provide data on current complementary feeding practices, focusing on protein and iron intake in Thai infants. This information, combined with data on associations with infant growth and iron status, will help inform complementary feeding recommendations for this population and may be found relevant to other settings experiencing the double burden of malnutrition. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/18112.
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Affiliation(s)
- Kulnipa Kittisakmontri
- Childhood Nutrition Research Centre, Population Policy and Practice Research and Teaching Department, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom.,Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Julie Lanigan
- Childhood Nutrition Research Centre, Population Policy and Practice Research and Teaching Department, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Jonathan C K Wells
- Childhood Nutrition Research Centre, Population Policy and Practice Research and Teaching Department, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Mary Fewtrell
- Childhood Nutrition Research Centre, Population Policy and Practice Research and Teaching Department, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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10
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Craine EB, Murphy KM. Seed Composition and Amino Acid Profiles for Quinoa Grown in Washington State. Front Nutr 2020; 7:126. [PMID: 32903386 PMCID: PMC7434868 DOI: 10.3389/fnut.2020.00126] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 06/30/2020] [Indexed: 01/16/2023] Open
Abstract
Quinoa (Chenopodium quinoa Willd.) is a pseudocereal celebrated for its excellent nutritional quality and potential to improve global food security, especially in marginal environments. However, minimal information is available on how genotype influences seed composition, and thus, nutritional quality. This study aimed to provide a baseline for nutritional quality of Washington grown quinoa and test the hypothesis that these samples contain adequate amounts of essential amino acids to meet daily requirements set by the World Health Organization (WHO). One hundred samples, representing commercial varieties and advanced breeding lines adapted to Washington State, were analyzed for content of 23 amino acids, as well as crude protein, ash, moisture, and crude fat. Mean essential amino acid values for Washington grown quinoa met the daily requirements for all age groups for all essential amino acids, except for the amount of leucine required by infants. We found that only nine genotypes met the leucine requirements for all age groups. A total of 52 and 94 samples met the lysine and tryptophan requirements for all age groups, respectively. Mean values for isoleucine, leucine, lysine, tryptophan, valine, and the sulfur and aromatic amino acids are higher for Washington grown samples than those reported previously reported in the literature. Our results show that not all Washington grown quinoa samples meet daily requirements of essential amino acids, and we identify limiting amino acids for the germplasm and environments investigated. This study provides the first report of leucine as a limiting amino acid in quinoa. Additional research is needed to better understand variation in quinoa nutritional composition, identify varieties that meet daily requirements, and explore how genotype, environment, and management interactions influence nutritional quality.
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Affiliation(s)
- Evan B Craine
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States
| | - Kevin M Murphy
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States
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Oladiran DA, Emmambux NM. Locally Available African Complementary Foods: Nutritional Limitations and Processing Technologies to Improve Nutritional Quality—A Review. FOOD REVIEWS INTERNATIONAL 2020. [DOI: 10.1080/87559129.2020.1762640] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dolapo A. Oladiran
- Department of Consumer and Food Sciences, University of Pretoria, Hatfield, South Africa
| | - Naushad M. Emmambux
- Department of Consumer and Food Sciences, University of Pretoria, Hatfield, South Africa
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Abstract
The human body grows in length from conception to the maximal adult height over two decades. The shortest male population averages ∼150 cm and the tallest ∼183 cm. Nonetheless the dimensions of head and trunk are highly comparable, with the vast difference in the leg length. Stunting is a personal condition in which an individual has a standing height-for-age (HAZ) of less than two standard deviations of the standard curve median. It is associated with increased mortality, morbidity, and functional deficits. The process of losing relative stature is known as linear growth retardation, first attributed to chronic protein deficiency, then to an assortment of micronutrient deficiencies, and most recently to inflammation from unhygienic environmental conditions. Public health intervention trials responding to each of these possibilities have failed to produce true reversal responses measured in the 10s of centimeters. As to biological insights, there is no convenient way to separate weight from length growth with sonographic monitoring, but a third of infants can be born stunted. Normative growth (standard curves) competes with epigenetic adaptation (programming) as the beacon for in utero growth. Major investments into field trials allow us to discard multiple micronutrients and water/sanitation/hygiene interventions as measures to reverse established stunting. The preponderance of evidence is against catch-up growth during puberty. Future publications will be in the conceptual domain, resolving metrics, while the full range of stimuli and exposures impeding growth will be elucidated. Advances in measurement techniques in anthropometry and immunology and endocrinology will be mobilized to the literature.
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Affiliation(s)
- Noel W. Solomons
- Center for Studies of Sensory Impairment, Aging and Metabolism (CeSSIAM), Guatemala City, Guatemala
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13
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Khazaei H, Subedi M, Nickerson M, Martínez-Villaluenga C, Frias J, Vandenberg A. Seed Protein of Lentils: Current Status, Progress, and Food Applications. Foods 2019; 8:E391. [PMID: 31487958 PMCID: PMC6769807 DOI: 10.3390/foods8090391] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 08/28/2019] [Accepted: 08/30/2019] [Indexed: 11/17/2022] Open
Abstract
Grain legumes are widely recognized as staple sources of dietary protein worldwide. Lentil seeds are an excellent source of plant-based proteins and represent a viable alternative to animal and soybean proteins for food processing formulations. Lentil proteins provide not only dietary amino acids but are also a source of bioactive peptides that provide health benefits. This review focuses on the current knowledge of seed protein, extraction and isolation methods, bioactive peptides, and food applications of lentil protein. Lentil is the most rapidly expanding crop for direct human consumption, and has potential for greater impact as a protein source for food processing applications. Improvements in lentil protein quality, amino acid composition, and processing fractions will enhance the nutritional quality of this rapidly expanding crop globally.
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Affiliation(s)
- Hamid Khazaei
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada.
| | - Maya Subedi
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada
| | - Mike Nickerson
- Food and Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada
| | - Cristina Martínez-Villaluenga
- Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), Jose Antonio Novais 10, 28040 Madrid, Spain
| | - Juana Frias
- Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), Jose Antonio Novais 10, 28040 Madrid, Spain
| | - Albert Vandenberg
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada
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Irwin MT, Samonds KE, Raharison JL, Junge RE, Mahefarisoa KL, Rasambainarivo F, Godfrey LR, Glander KE. Morphometric signals of population decline in diademed sifakas occupying degraded rainforest habitat in Madagascar. Sci Rep 2019; 9:8776. [PMID: 31217457 PMCID: PMC6584568 DOI: 10.1038/s41598-019-45426-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 05/23/2019] [Indexed: 11/08/2022] Open
Abstract
Anthropogenic habitat change can have varied impacts on primates, including both negative and positive outcomes. Even when behavioural shifts are seen, they may reflect decreased health, or simply behavioural flexibility; understanding this distinction is important for conservation efforts. This study examines habitat-related variation in adult and immature morphometrics among diademed sifakas (Propithecus diadema). We collected morphometric data from sifakas at Tsinjoarivo, Madagascar (19 years, 188 captures, 113 individuals). Captures spanned 12 groups, five within continuous forest ("CONT"), and seven in degraded fragments ("FRAG") where sifakas have lower nutritional intakes. Few consistent differences were found between CONT and FRAG groups. However, using home range quality as a covariate rather than a CONT/FRAG dichotomy revealed a threshold: the two FRAG groups in the lowest-quality habitat showed low adult mass and condition (wasting), and low immature mass and length (stunting). Though less-disturbed fragments apparently provide viable habitat, we suggest the sifakas in the most challenging habitats cannot evolve fast enough to keep up with such rapid habitat change. We suggest other long-lived organisms will show similar morphometric "warning signs" (wasting in adults, stunting in immatures); selected morphometric variables can thus be useful at gauging vulnerability of populations in the face of anthropogenic change.
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Affiliation(s)
- Mitchell T Irwin
- Department of Anthropology, Northern Illinois University, DeKalb, IL, 60115, USA.
| | - Karen E Samonds
- Department of Biological Sciences, Northern Illinois University, DeKalb, IL, 60115, USA
| | | | | | | | | | - Laurie R Godfrey
- Department of Anthropology, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Kenneth E Glander
- Department of Evolutionary Anthropology, Duke University, Durham, NC, 27708, USA
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Shivakumar N, Kashyap S, Kishore S, Thomas T, Varkey A, Devi S, Preston T, Jahoor F, Sheshshayee MS, Kurpad AV. Protein-quality evaluation of complementary foods in Indian children. Am J Clin Nutr 2019; 109:1319-1327. [PMID: 30920607 PMCID: PMC6499502 DOI: 10.1093/ajcn/nqy265] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The types of food in complementary feeding of infants and young children are important for growth and development. Food protein quality, as measured by the Digestible Indispensable Amino Acid Score (DIAAS), requires the determination of true ileal digestibility of indispensable amino acids (IAAs) in children. OBJECTIVES First, the aim of this study was to measure the true ileal IAA digestibility of 4 (rice, finger millet, mung bean, and hen egg) commonly consumed complementary foods in children aged <2 y using the dual-isotope tracer method. Second, we calculated the DIAAS of complementary feeding diets and their relation to stunting in a representative Indian rural population. DESIGN Rice, finger millet, and mung bean were intrinsically labeled with deuterium oxide (2H2O), whereas egg was labeled through oral dosing of hens with a uniformly 2H-labeled amino acid mixture. True ileal IAA digestibility was determined by the dual-isotope tracer technique. The DIAAS of complementary food protein was calculated in children aged 1-3 y from a nationally representative survey to evaluate its relation with stunting. RESULTS True ileal IAA digestibility was lowest in mung bean (65.2% ± 7.1%), followed by finger millet (68.4 %± 5.3%) and rice (78.5% ± 3.5%), and was highest for egg (87.4% ± 4.0%). There was a significant inverse correlation of complementary food DIAAS with stunting in survey data (r = -0.66, P = 0.044). The addition of egg or milk to nationally representative complementary diets theoretically improved the DIAAS from 80 to 100. CONCLUSIONS The true ileal IAA digestibility of 4 foods commonly consumed in complementary diets showed that the DIAAS was associated with stunting and reinforces the importance of including animal source food (ASF) in diets to improve growth. This trial was registered at http://ctri.nic.in/clinicaltrials/login.php as CTRI/2017/02/007921.
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Affiliation(s)
| | | | | | - Tinku Thomas
- Department of Biostatistics, St. John's Medical College, St. John's National Academy of Health Sciences, Bangalore, India
| | | | | | - Thomas Preston
- Scottish Universities Environmental Research Center, East Kilbride, United Kingdom
| | - Farook Jahoor
- USDA/Agricultural Research Service Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - M S Sheshshayee
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore, India
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16
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de Jager I, Borgonjen-van den Berg KJ, Giller KE, Brouwer ID. Current and potential role of grain legumes on protein and micronutrient adequacy of the diet of rural Ghanaian infants and young children: using linear programming. Nutr J 2019; 18:12. [PMID: 30791898 PMCID: PMC6385461 DOI: 10.1186/s12937-019-0435-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 02/12/2019] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Grain legumes are appreciated for their contribution to dietary protein and micronutrient intake in addition to their benefits in providing income and replenishing soil fertility. They offer potential benefits in developing countries where future food demand is increasing and both undernutrition and overweight co-exist. We studied the current and potential role of grain legumes on protein, both quantity and quality, and micronutrient adequacy in the diet of rural Ghanaian infants and young children. METHODS Energy and nutrient (including amino acids) intakes of breastfed children of 6-8 months (n=97), 9-11 months (n=97), 12-23 months (n=114), and non-breastfed children of 12-23 months (n=29) from Karaga district in Northern Ghana were assessed using a repeated quantitative multi-pass 24-hour recall method. Food-based dietary guidelines that cover nutrient adequacy within the constraints of local current dietary patterns were designed using the linear programming software Optifood (version 4.0.9, Optifood©). Optifood was also used to evaluate whether additional legumes would further improve nutrient adequacy. RESULTS We found that 60% of the children currently consumed legumes with an average portion size of 20 g per day (cooked) contributing more than 10% of their total protein, folate, iron and niacin intake. The final sets of food-based recommendations included legumes and provided adequate protein and essential amino acids but insufficient calcium, iron, niacin and/or zinc among breastfed children and insufficient calcium, vitamin C, vitamin B12 and vitamin A among non-breastfed children. The sets of food-based recommendations combined with extra legumes on top of the current dietary pattern improved adequacy of calcium, iron, niacin and zinc but only reached sufficient amounts for calcium among breastfed children of 6-8 months old. CONCLUSIONS Although legumes are often said to be the 'meat of the poor' and current grain legume consumption among rural children contribute to protein intake, the main nutritional benefit of increased legume consumption is improvement of micronutrient adequacy. Besides food-based recommendations, other interventions are needed such as food-based approaches and/or fortification or supplementation strategies to improve micronutrient adequacy of infants and young children in rural Ghana. TRIAL REGISTRATION Noguchi Memorial Institute for Medical Research Institutional Review Board (NMIMR-IRB CPN 087/13-14).
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Affiliation(s)
- Ilse de Jager
- Division of Human Nutrition and Plant Production Systems group, Wageningen University, Wageningen, The Netherlands
| | | | - Ken E. Giller
- Plant Production Systems group, Wageningen University, Wageningen, The Netherlands
| | - Inge D. Brouwer
- Division of Human Nutrition and Health, Wageningen University, Wageningen, The Netherlands
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17
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Gastiazoro MP, Guerrero-Schimpf M, Durando M, Lazzarino GP, Andreoli MF, Zierau O, Luque EH, Ramos JG, Varayoud J. Induction of uterine hyperplasia after cafeteria diet exposure. Mol Cell Endocrinol 2018; 477:112-120. [PMID: 29908751 DOI: 10.1016/j.mce.2018.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 12/16/2022]
Abstract
Our aim was to evaluate whether chronic administration of CAF affects the uterus and induces the morphological and molecular changes associated with endometrial hyperplasia. Female Wistar rats exposed to CAF from weaning for 20 weeks displayed increased energy intake, body weight and fat depots, but did not develop metabolic syndrome. The adult uteri showed an increase in glandular volume fraction and stromal area. The epithelial proliferation rate and protein expression of oestrogen receptor alpha (ERα) were also increased. The CAF diet enhanced leptin serum levels and the long form of leptin receptor (Ob-Rb) mRNA expression in the uterus. No changes were detected in either insulin serum levels or those of insulin growth factor I (IGF-I) mRNA expression. However the levels of IGF-I receptor (IGF-IR) mRNA were lower in CAF-fed animals. Overall, the results indicate that our rat model of the CAF diet produces morphological and molecular changes associated with uterine hyperplasia and could predispose to endometrial carcinogenesis.
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Affiliation(s)
- María Paula Gastiazoro
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Marlise Guerrero-Schimpf
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Milena Durando
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Gisela Paola Lazzarino
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - María Florencia Andreoli
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Oliver Zierau
- Molecular Cell Physiology and Endocrinology, Institute for Zoology, Technische Universität Dresden, 01062, Dresden, Germany.
| | - Enrique Hugo Luque
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Jorge Guillermo Ramos
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
| | - Jorgelina Varayoud
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
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18
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Abstract
The volume of research into the pathogenesis and treatment of malnutrition has increased markedly over the past ten years, providing mechanistic insights that can be leveraged into more effective treatment options. These discoveries have been driven by several landmark studies employing metabolomics, metagenomics, and new preclinical models. This review highlights some of the most important recent findings, focusing in particular on the emerging roles of prenatal and perinatal factors, protein deficiency, impaired gut barrier function, immune deficiency, and the intestinal microbiome.
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Tessema M, Gunaratna NS, Brouwer ID, Donato K, Cohen JL, McConnell M, Belachew T, Belayneh D, De Groote H. Associations among High-Quality Protein and Energy Intake, Serum Transthyretin, Serum Amino Acids and Linear Growth of Children in Ethiopia. Nutrients 2018; 10:E1776. [PMID: 30453477 PMCID: PMC6266228 DOI: 10.3390/nu10111776] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/05/2018] [Accepted: 11/09/2018] [Indexed: 12/17/2022] Open
Abstract
Limited evidence is available on the associations of high-quality protein and energy intake, serum transthyretin (TTR), serum amino acids and serum insulin-like growth factor-1 (IGF-1) with linear growth of young children. Data collected during the baseline of a randomized control trial involving rural Ethiopian children aged 6⁻35 months (n = 873) were analyzed to evaluate the associations among height/length-for-age z-scores, dietary intakes, and these biomarkers (i.e., serum level of TTR, IGF-1, tryptophan and lysine, and inflammation). The prevalence of stunting was higher for children >23 months (38%) than ≤23 months (25%). The prevalence of inflammation was 35% and of intestinal parasites 48%. Three-quarters of the children were energy deficient, and stunted children had lower daily energy intake that non-stunted children (p < 0.05). Intakes of tryptophan, protein, and energy, and serum levels of tryptophan and IGF-1 were positively correlated with the linear growth of children. Controlling for inflammation, intestinal parasites, and sociodemographic characteristics, daily tryptophan (b = 0.01, p = 0.001), protein (b = 0.01, p = 0.01) and energy (b = 0.0003, p = 0.04) intakes and serum TTR (b = 2.58, p = 0.04) and IGF-1 (b = 0.01, p = 0.003) were positively associated with linear growth of children. Linear growth failure in Ethiopian children is likely associated with low quality protein intake and inadequate energy intake. Nutrition programs that emphasize improved protein quantity and quality and energy intake may enhance the linear growth of young children and need to be further investigated in longitudinal and interventional studies.
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Affiliation(s)
- Masresha Tessema
- Division of Human Nutrition, Wageningen University, 6700 AA Wageningen, The Netherlands.
- Ethiopian Public Health Institute, Gulele Sub City, P.O. Box 1242, Addis Ababa, Ethiopia.
- Human Nutrition Unit, Jimma University, P.O. Box 378, Jimma, Ethiopia.
| | - Nilupa S Gunaratna
- Department of Nutrition Science and Public Health Graduate Program, Purdue University, West Lafayette, IN 47907, USA.
| | - Inge D Brouwer
- Division of Human Nutrition, Wageningen University, 6700 AA Wageningen, The Netherlands.
| | - Katherine Donato
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Jessica L Cohen
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | | | - Tefera Belachew
- Human Nutrition Unit, Jimma University, P.O. Box 378, Jimma, Ethiopia.
| | - Demissie Belayneh
- International Maize and Wheat Improvement Centre (CIMMYT), P.O. Box 5689, Addis Ababa, Ethiopia.
| | - Hugo De Groote
- International Maize and Wheat Improvement Centre (CIMMYT), P.O. Box 1041-00621, Nairobi, Kenya.
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20
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Wu S, Qian L, Huang L, Sun X, Su H, Gurav DD, Jiang M, Cai W, Qian K. A Plasmonic Mass Spectrometry Approach for Detection of Small Nutrients and Toxins. NANO-MICRO LETTERS 2018; 10:52. [PMID: 30393701 PMCID: PMC6199099 DOI: 10.1007/s40820-018-0204-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 04/17/2018] [Indexed: 05/23/2023]
Abstract
Nutriology relies on advanced analytical tools to study the molecular compositions of food and provide key information on sample quality/safety. Small nutrients detection is challenging due to the high diversity and broad dynamic range of molecules in food samples, and a further issue is to track low abundance toxins. Herein, we developed a novel plasmonic matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) approach to detect small nutrients and toxins in complex biological emulsion samples. Silver nanoshells (SiO2@Ag) with optimized structures were used as matrices and achieved direct analysis of ~ 6 nL of human breast milk without any enrichment or separation. We performed identification and quantitation of small nutrients and toxins with limit-of-detection down to 0.4 pmol (for melamine) and reaction time shortened to minutes, which is superior to the conventional biochemical method currently in use. The developed approach contributes to the near-future application of MALDI MS in a broad field and personalized design of plasmonic materials for real-case bio-analysis.
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Affiliation(s)
- Shu Wu
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Linxi Qian
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China
| | - Lin Huang
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Xuming Sun
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Haiyang Su
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Deepanjali D Gurav
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Mawei Jiang
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China
| | - Wei Cai
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China.
| | - Kun Qian
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China.
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