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Alvarez-Bustamante JA, Muñoz AM. Modeling Zinc Absorption in the Adult Population of Colombia: Insights for Nutritional Evaluation and Intervention Strategies. Biol Trace Elem Res 2024:10.1007/s12011-024-04180-x. [PMID: 38739259 DOI: 10.1007/s12011-024-04180-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/08/2024] [Indexed: 05/14/2024]
Abstract
Zinc is a vital trace element, yet its deficiency is common in various populations. This study addresses the gap in understanding zinc intake and its relationship with key nutritional parameters in a Colombian population. We analyzed data from 12,987 individuals, focusing on the daily intake of zinc, phytate, protein, and calcium, and used the phytate/zinc molar ratio as an input parameter in the Miller et al. (2013) model. This model was employed to estimate the total absorbed zinc (TAZ) and the fractional absorption of zinc (FAZ). Our findings highlight a general trend towards insufficient intake compared to the standards of the Institute of Medicine (IOM) and Colombia, with a significant percentage of the population falling below the estimated average requirement (EAR) and recommended daily allowance (RDA) for zinc, underscoring the need for targeted nutritional strategies. Our study contributes to a broader understanding of zinc nutrition and public health implications in Colombia, providing a basis for future dietary guidelines and health interventions.
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Chemometrics-assisted inductively coupled plasma-optical emission spectrometry method for determination of natural zinc isotopes. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-022-08756-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Maares M, Haase H. A Guide to Human Zinc Absorption: General Overview and Recent Advances of In Vitro Intestinal Models. Nutrients 2020; 12:E762. [PMID: 32183116 PMCID: PMC7146416 DOI: 10.3390/nu12030762] [Citation(s) in RCA: 146] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/23/2020] [Accepted: 03/09/2020] [Indexed: 12/17/2022] Open
Abstract
Zinc absorption in the small intestine is one of the main mechanisms regulating the systemic homeostasis of this essential trace element. This review summarizes the key aspects of human zinc homeostasis and distribution. In particular, current knowledge on human intestinal zinc absorption and the influence of diet-derived factors on bioaccessibility and bioavailability as well as intrinsic luminal and basolateral factors with an impact on zinc uptake are discussed. Their investigation is increasingly performed using in vitro cellular intestinal models, which are continually being refined and keep gaining importance for studying zinc uptake and transport via the human intestinal epithelium. The vast majority of these models is based on the human intestinal cell line Caco-2 in combination with other relevant components of the intestinal epithelium, such as mucin-secreting goblet cells and in vitro digestion models, and applying improved compositions of apical and basolateral media to mimic the in vivo situation as closely as possible. Particular emphasis is placed on summarizing previous applications as well as key results of these models, comparing their results to data obtained in humans, and discussing their advantages and limitations.
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Affiliation(s)
- Maria Maares
- Technische Universität Berlin, Chair of Food Chemistry and Toxicology, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Hajo Haase
- Technische Universität Berlin, Chair of Food Chemistry and Toxicology, Straße des 17. Juni 135, 10623 Berlin, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany
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Sheftel J, Loechl C, Mokhtar N, Tanumihardjo SA. Use of Stable Isotopes to Evaluate Bioefficacy of Provitamin A Carotenoids, Vitamin A Status, and Bioavailability of Iron and Zinc. Adv Nutr 2018; 9:625-636. [PMID: 30239582 PMCID: PMC6140444 DOI: 10.1093/advances/nmy036] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/25/2018] [Accepted: 05/14/2018] [Indexed: 01/25/2023] Open
Abstract
The ability of nutrition scientists to measure the status, bioavailability, and bioefficacy of micronutrients is affected by lack of access to the parts of the body through which a nutrient may travel before appearing in accessible body compartments (typically blood or urine). Stable isotope-labeled tracers function as safe, nonradioactive tools to follow micronutrients in a quantitative manner because the absorption, distribution, metabolism, and excretion of the tracer are assumed to be similar to the unlabeled vitamin or mineral. The International Atomic Energy Agency (IAEA) supports research on the safe use of stable isotopes in global health and nutrition. This review focuses on IAEA's contributions to vitamin A, iron, and zinc research. These micronutrients are specifically targeted by the WHO because of their importance in health and worldwide prevalence of deficiency. These 3 micronutrients are included in food fortification and biofortification efforts in low- and middle-income regions of the world. Vitamin A isotopic techniques can be used to evaluate the efficacy and effectiveness of interventions. For example, total body retinol stores were estimated by using 13C2-retinol isotope dilution before and after feeding Zambian children maize biofortified with β-carotene to determine if vitamin A reserves were improved by the intervention. Stable isotopes of iron and zinc have been used to determine mineral bioavailability. In Thailand, ferrous sulfate was better absorbed from fish sauce than was ferrous lactate or ferric ammonium citrate, determined with the use of different iron isotopes in each compound. Comparisons of one zinc isotope injected intravenously with another isotope taken orally from a micronutrient powder proved that the powder increased total absorbed zinc from a meal in Pakistani infants. Capacity building by the IAEA with appropriate collaborations in low- and middle-income countries to use stable isotopes has resulted in many advancements in human nutrition.
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Affiliation(s)
- Jesse Sheftel
- Interdepartmental Graduate Program in Nutritional Sciences, University of Wisconsin–Madison, Madison, WI
| | | | | | - Sherry A Tanumihardjo
- Interdepartmental Graduate Program in Nutritional Sciences, University of Wisconsin–Madison, Madison, WI
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Wastney ME, McDonald CM, King JC. A dynamic model for predicting growth in zinc-deficient stunted infants given supplemental zinc. Am J Clin Nutr 2018; 107:808-816. [PMID: 29722842 DOI: 10.1093/ajcn/nqy020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/17/2018] [Indexed: 11/14/2022] Open
Abstract
Background Zinc deficiency limits infant growth and increases susceptibility to infections, which further compromises growth. Zinc supplementation improves the growth of zinc-deficient stunted infants, but the amount, frequency, and duration of zinc supplementation required to restore growth in an individual child is unknown. A dynamic model of zinc metabolism that predicts changes in weight and length of zinc-deficient, stunted infants with dietary zinc would be useful to define effective zinc supplementation regimens. Objective The aims of this study were to develop a dynamic model for zinc metabolism in stunted, zinc-deficient infants and to use that model to predict the growth response when those infants are given zinc supplements. Design A model of zinc metabolism was developed using data on zinc kinetics, tissue zinc, and growth requirements for healthy 9-mo-old infants. The kinetic model was converted to a dynamic model by replacing the rate constants for zinc absorption and excretion with functions for these processes that change with zinc intake. Predictions of the dynamic model, parameterized for zinc-deficient, stunted infants, were compared with the results of 5 published zinc intervention trials. The model was then used to predict the results for zinc supplementation regimes that varied in the amount, frequency, and duration of zinc dosing. Results Model predictions agreed with published changes in plasma zinc after zinc supplementation. Predictions of weight and length agreed with 2 studies, but overpredicted values from a third study in which other nutrient deficiencies may have been growth limiting; the model predicted that zinc absorption was impaired in that study. Conclusions The model suggests that frequent, smaller doses (5-10 mg Zn/d) are more effective for increasing growth in stunted, zinc-deficient 9-mo-old infants than are larger, less-frequent doses. The dose amount affects the duration of dosing necessary to restore and maintain plasma zinc concentration and growth.
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Affiliation(s)
| | | | - Janet C King
- Children's Hospital Oakland Research Institute, Oakland, CA
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Montes-Bayón M, Bettmer J. The Use of Stable Isotopic Tracers in Metallomics Studies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1055:111-137. [DOI: 10.1007/978-3-319-90143-5_6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Alpers DH, Young GP, Tran CD, Mortimer EK, Gopalsamy GL, Krebs NF, Manary MJ, Ramakrishna BS, Binder HJ, Brown IL, Miller LV. Drug-development concepts as guides for optimizing clinical trials of supplemental zinc for populations at risk of deficiency or diarrhea. Nutr Rev 2017; 75:147-162. [PMID: 28399577 DOI: 10.1093/nutrit/nuw065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Studies on the efficacy of zinc supplementation for treatment or prevention of diarrhea have shown an inconsistent effect in populations at risk for zinc deficiency. Unlike drugs, which have no preexisting presence in the body, endogenous zinc must be assessed pharmacokinetically by isotope tracer studies. Although such methods have produced much data, very few studies have estimated the dose and the timing of dosing of zinc supplementation. This review examines drug kinetics used to establish the best dose, the timing of such doses, and the mechanism of action through pharmacodynamic markers and applies them, where possible, to zinc supplements. The findings reveal that little is known, especially in children at highest risk of zinc deficiency. Key data missing to inform proper dosing, whether for treatment of disease or for preventive nutrient supplementation, are noted. Addressing these uncertainties could improve study design, leading to future studies of zinc supplements that might be of greater benefit.
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Affiliation(s)
- David H Alpers
- School of Medicine, Washington University, St Louis, Missouri, USA
| | - Graeme P Young
- School of Medicine, Flinders University of South Australia, Adelaide, South Australia, Australia
| | - Cuong D Tran
- CSIRO Health and Biosecurity, Adelaide, South Australia, Australia.,School of Medicine, Faculty of Health Sciences, The University of Adelaide, South Australia, Australia
| | - Elissa K Mortimer
- School of Medicine, Flinders University of South Australia, Adelaide, South Australia, Australia
| | - Geetha L Gopalsamy
- School of Medicine, Flinders University of South Australia, Adelaide, South Australia, Australia.,CSIRO Health and Biosecurity, Adelaide, South Australia, Australia
| | - Nancy F Krebs
- Section of Nutrition, Department of Pediatrics, University of Colorado School of Medicine, Denver, Colorado, USA
| | - Mark J Manary
- School of Medicine, Washington University, St Louis, Missouri, USA
| | | | - Henry J Binder
- School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Ian L Brown
- School of Medicine, Flinders University of South Australia, Adelaide, South Australia, Australia
| | - Leland V Miller
- Section of Nutrition, Department of Pediatrics, University of Colorado School of Medicine, Denver, Colorado, USA
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Wang C, Lin X, Guo D, Ding L, Guo H, Xu G, Cui X, Wang X. Zinc Fractional Absorption from a Representative Diet in Young Chinese Men and Women of the Shandong Rural Region. Biol Trace Elem Res 2017; 177:16-24. [PMID: 27744602 DOI: 10.1007/s12011-016-0865-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 10/05/2016] [Indexed: 10/20/2022]
Abstract
The objective of this study was to investigate the zinc fractional absorption of young Chinese men and women from the Shandong rural region under the routine dietary pattern by stable isotope technique. Ten men and 10 women, aged 20 to 35 years, and with a representative diet during the experiment were recruited from the Shandong rural region. Stable 67Zn was used as a tracer to label ZnCl2, and Yb was used to monitor the excretion of 67Zn in urine and feces. All volunteers were given rice containing 4.0 mg 67Zn and 1.0 mg Yb on the fourth day. Then the food and fecal samples of all subjects were collected for 12 consecutive days. The total zinc and the stable zinc isotope ratio of all samples were determined by atomic absorption spectrophotometer and thermal ionization mass spectrometer, respectively. The determination of the other nutrients was performed based on the Chinese National Standard Methods. Among volunteers, the daily intake of zinc was 15.50 mg, 103.33 % of recommended nutrient intake (RNI, set by the Chinese Nutrition Society) in men and 15.43 mg, 134.17 % in women. The fractional absorption of Zn was 23.42 ± 2.23 % in men, and 22.49 ± 2.19 % in women. The protein candidates got from the typical diets was 93.96 % of RNI in women. Calcium and ascorbic acid intakes were 76.23 % of RNI and 27.91 % of RNI in men, respectively and 51.17 % of RNI and 34.23 % of RNI in women, respectively. Our results showed that a typical meal for someone in the Shandong rural region presented an adequate intake of zinc and a moderate Zn bioavailability. The shortage of protein and the inappropriate protein pattern may play important roles in reducing zinc bioavailability.
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Affiliation(s)
- Cuiping Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China
| | - Xinying Lin
- Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China.
| | - Dongmei Guo
- Department of Chemistry and Bacteria Detection, School of Public Health, Shandong University, Jinan, China
| | - Lili Ding
- Nutrition Department, Beijing Hospital, Beijing, China
| | - Haifeng Guo
- China Nutrition and Health Food Association, Beijing, China
| | - Guifa Xu
- Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China
| | - Xi Cui
- Department of Chemistry and Bacteria Detection, School of Public Health, Shandong University, Jinan, China
| | - Xia Wang
- Department of Maternal and Child Health Care, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China.
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