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Ceballos-Rasgado M, Brazier AKM, Gupta S, Moran VH, Pierella E, Fekete K, Lowe NM. Methods of Assessment of Zinc Status in Humans: An Updated Review and Meta-analysis. Nutr Rev 2024:nuae072. [PMID: 38917458 DOI: 10.1093/nutrit/nuae072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024] Open
Abstract
CONTEXT The assessment of zinc status is difficult but essential for the identification of zinc deficiency and evaluation of interventions to improve zinc status. OBJECTIVE The purpose of this systematic review (SR) and meta-analysis was to update the previously published SR of biomarkers of zinc status, conducted by the European Micronutrient Recommendations Aligned (EURRECA) network in 2009, to answer the question: Which putative measures (biomarkers) of zinc status appropriately reflect a change in zinc intake of at least 2 weeks? DATA SOURCES A structured search strategy was used to identify articles published between January 2007 and September 2022 from MEDLINE (Ovid), Embase (Ovid), Cochrane Database of Systematic Reviews, and Cochrane Central Register of Controlled Trials (CENTRAL). Relevant articles were identified using previously defined eligibility criteria. DATA EXTRACTION Data were extracted and combined with data from the previous SR. DATA ANALYSIS A random-effects model was used to calculate pooled mean differences using STATA (StataCorp). The risk of bias and the certainty of evidence for all outcomes were assessed. Additional data on 7 of the 32 previously reported biomarkers were identified, along with data on an additional 40 putative biomarkers from studies published since 2007. Pooled data analysis confirmed that, in healthy participants, both plasma/serum zinc concentration and urinary zinc excretion responded to changes in zinc intake (plasma/serum: mean effect [95% CI], controlled studies: 2.17 µmol/L [1.73, 2.61]; P < .005, I2 = 97.8; before-and-after studies: 2.87 µmol/L [2.45, 3.30]; P < .005, I2 = 98.1%; urine zinc: 0.39 mmol/mol creatinine [0.17, 0.62]; P < .005, I2 = 81.2; 3.09 µmol/day [0.16, 6.02]; P = .039, I2 = 94.3). CONCLUSION The updated analyses support the conclusion that plasma/serum and urinary zinc respond to changes in zinc intake in studies of healthy participants. Several additional putative biomarkers were identified, but more studies are needed to assess the sensitivity and reliability. SYSTEMATIC REVIEW REGISTRATION PROSPERO no. CRD42020219843.
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Affiliation(s)
- Marena Ceballos-Rasgado
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Anna K M Brazier
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Swarnim Gupta
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Victoria H Moran
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Elisa Pierella
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Katalin Fekete
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs 7624, Hungary
| | - Nicola M Lowe
- Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, United Kingdom
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Lowe NM, Hall AG, Broadley MR, Foley J, Boy E, Bhutta ZA. Preventing and Controlling Zinc Deficiency Across the Life Course: A Call to Action. Adv Nutr 2024; 15:100181. [PMID: 38280724 PMCID: PMC10882121 DOI: 10.1016/j.advnut.2024.100181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/11/2024] [Accepted: 01/23/2024] [Indexed: 01/29/2024] Open
Abstract
Through diverse roles, zinc determines a greater number of critical life functions than any other single micronutrient. Beyond the well-recognized importance of zinc for child growth and resistance to infections, zinc has numerous specific roles covering the regulation of glucose metabolism, and growing evidence links zinc deficiency with increased risk of diabetes and cardiometabolic disorders. Zinc nutriture is, thus, vitally important to health across the life course. Zinc deficiency is also one of the most common forms of micronutrient malnutrition globally. A clearer estimate of the burden of health disparity attributable to zinc deficiency in adulthood and later life emerges when accounting for its contribution to global elevated fasting blood glucose and related noncommunicable diseases (NCDs). Yet progress attenuating its prevalence has been limited due, in part, to the lack of sensitive and specific methods to assess human zinc status. This narrative review covers recent developments in our understanding of zinc's role in health, the impact of the changing climate and global context on zinc intake, novel functional biomarkers showing promise for monitoring population-level interventions, and solutions for improving population zinc intake. It aims to spur on implementation of evidence-based interventions for preventing and controlling zinc deficiency across the life course. Increasing zinc intake and combating global zinc deficiency requires context-specific strategies and a combination of complementary, evidence-based interventions, including supplementation, food fortification, and food and agricultural solutions such as biofortification, alongside efforts to improve zinc bioavailability. Enhancing dietary zinc content and bioavailability through zinc biofortification is an inclusive nutrition solution that can benefit the most vulnerable individuals and populations affected by inadequate diets to the greatest extent.
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Affiliation(s)
- Nicola M Lowe
- Center for Global Development, University of Central Lancashire, Preston, United Kingdom.
| | - Andrew G Hall
- Department of Nutrition, University of California, Davis, CA, United States; Department of Nutritional Sciences & Toxicology, University of California, Berkeley, CA, United States
| | - Martin R Broadley
- Rothamsted Research, West Common, Harpenden, United Kingdom; School of Biosciences, University of Nottingham, Loughborough, United Kingdom
| | - Jennifer Foley
- HarvestPlus, International Food Policy Research Institute, Washington, DC, United States
| | - Erick Boy
- HarvestPlus, International Food Policy Research Institute, Washington, DC, United States
| | - Zulfiqar A Bhutta
- Center for Global Child Health, The Hospital for Sick Children, Toronto, ON, Canada; Center of Excellence in Women and Child Health, Aga Khan University, Karachi, Pakistan
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Wang X, Zhang M, Ma J, Tie Y, Wang S. Biochemical Markers of Zinc Nutrition. Biol Trace Elem Res 2024:10.1007/s12011-024-04091-x. [PMID: 38319550 DOI: 10.1007/s12011-024-04091-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 01/29/2024] [Indexed: 02/07/2024]
Abstract
Zinc is an important trace element involved in the biochemical and physiological functions of the organism and is essential in the human body. It has been reported that 17.3% of people around the world are at risk of many diseases due to zinc deficiency, which has already affected people's healthy lives. Currently, mild zinc deficiency is difficult to diagnose early due to the lack of typical clinical manifestations, so finding zinc biomarkers is crucial for people's health. The present article reviews the main representative zinc biomarkers, such as body fluid zinc levels, zinc-dependent proteins, tissue zinc, and zinc-containing enzymes, to provide a reference for actively promoting the study of zinc nutritional status and early clinical diagnosis.
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Affiliation(s)
- Xinying Wang
- North China University of Science and Technology, Tangshan, Hebei Province, 063210, China
| | - Menghui Zhang
- North China University of Science and Technology, Tangshan, Hebei Province, 063210, China
| | - Jing Ma
- Hebei Key Laboratory of Reproductive Medicine, Hebei Reproductive Health Hospital, Shijiazhuang, Hebei Province, 050071, China
| | - Yanqing Tie
- Hebei General Hospital, Shijiazhuang, Hebei Province, 050051, China.
| | - Shusong Wang
- Hebei Key Laboratory of Reproductive Medicine, Hebei Reproductive Health Hospital, Shijiazhuang, Hebei Province, 050071, China.
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Signorell C, Kurpad AV, Pauline M, Shenvi S, Mukhopadhyay A, King JC, Zimmermann MB, Moretti D. The Effect of Zinc Biofortified Wheat Produced via Foliar Application on Zinc Status: A Randomized, Controlled Trial in Indian Children. J Nutr 2023; 153:3092-3100. [PMID: 37633331 DOI: 10.1016/j.tjnut.2023.08.013] [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: 03/09/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/28/2023] Open
Abstract
BACKGROUND Agronomic zinc biofortification of wheat by foliar application increases wheat zinc content and total zinc absorption in humans. OBJECTIVES To assess the effect of agronomically biofortified whole wheat flour (BFW) on plasma zinc (PZC) compared with a postharvest fortified wheat (PHFW) and unfortified control wheat (CW) when integrated in a midday school meal scheme. METHODS We conducted a 20-wk double-blind intervention trial in children (4-12 y, n = 273) individually randomly assigned to 3 groups to receive a daily school lunch consisting of 3 chapattis prepared with the 3 different wheat flour types. Measurements of anthropometry, blood biochemistry, and leukocyte DNA strand breaks were conducted. We applied sparse serial sampling to monitor PZC over time, and analysis was performed using linear mixed-effects models. RESULTS Mean zinc content in BFW, PHFW, and CW were 48.0, 45.1, and 21.2 ppm, respectively (P < 0.001). Mean (standard deviation) daily zinc intakes in the study intervention in BFW, PHFW, and CW groups were 4.4 (1.6), 5.9 (1.9) and 2.6 (0.6) mg Zn/d, respectively, with intake in groups PHFW and BFW differing from CW (P < 0.001) but no difference between BFW and PHFW. There were no time effect, group difference, or group × time interaction in PZC. Prevalence of zinc deficiency decreased in the BFW (from 14.1%-11.2%), PHFW (from 8.9%-2.3%), and CW (9.8%-8.8%) groups, but there was no time × treatment interaction in the prevalence of zinc deficiency (P = 0.191). Compliance with consuming the study school meals was associated with PZC (P = 0.006). DNA strand breaks were not significantly associated with PZC (n = 51; r = 0.004, P = 0.945). CONCLUSIONS Consumption of either PHFW or BFW provided an additional ∼1.8 to 3.3 mg Zn/d, but it did not affect PZC or zinc deficiency, growth, or DNA strand breaks. This trial was registered on clinicaltrials.gov as NCT02241330 and ctri.nic.in as CTRI/2015/06/005913.
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Affiliation(s)
- Coralie Signorell
- Laboratory for Human Nutrition, Institute of Food, Nutrition and Health, ETH Zurich, Switzerland
| | - Anura V Kurpad
- Department of Physiology, St. John's Medical College, St. John's National Academy of Health Sciences, Bengaluru, India
| | - Maria Pauline
- Department of Physiology, St. John's Medical College, St. John's National Academy of Health Sciences, Bengaluru, India
| | - Swapna Shenvi
- Nutrition and Metabolism Center, Children's Hospital Oakland Research Institute, Oakland, CA, United States
| | | | - Janet C King
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, United States
| | - Michael B Zimmermann
- Laboratory for Human Nutrition, Institute of Food, Nutrition and Health, ETH Zurich, Switzerland
| | - Diego Moretti
- Laboratory for Human Nutrition, Institute of Food, Nutrition and Health, ETH Zurich, Switzerland; Nutrition Group, Swiss Distance Learning University of Applied Sciences (FFHS)/University of Applied Sciences of South Switzerland (SUPSI), Zürich, Switzerland.
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Alfawaz W, Almutlaq M, Alzeer H, Alwashmi Y, Aljuraiban GS, Alsaid M, Alnashmi S. The relation between dietary zinc and immune status in saudi adults. Heliyon 2023; 9:e15042. [PMID: 37151648 PMCID: PMC10161369 DOI: 10.1016/j.heliyon.2023.e15042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 04/03/2023] Open
Abstract
Although there is an increased interest in zinc intake and its role in boosting immunity, to our knowledge, no studies have investigated the relationship between dietary zinc intake and immunity in Saudi adults. This cross-sectional study aimed to measure the extent to which the dietary zinc impacted the immune health of 252 Saudi adults aged 18 years and above. Immune health was assessed using the Immune Status Questionnaire (ISQ), and dietary zinc intake was estimated using an adapted zinc-specific version of the Saudi Food Frequency Questionnaire (SFFQ). Three scores were calculated for use in the statistical analyses (zinc intake score, immune status score, and health status score). A linear regression analysis was used to investigate the association between the dietary zinc intake and immune and health status scores. The means of dietary zinc intake, ISQ, and health status scores were 46.94, 7.10, and 7.84, respectively. We found that a high zinc intake score was directly associated with immune status score (p = 0.006) but was not associated with the health status score. The association remained significant after controlling for socio-demographic factors. Further studies are needed to confirm these findings.
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Effect of Selected Micro- and Macroelements and Vitamins on the Genome Stability of Bovine Embryo Transfer Recipients following In Vitro Fertilization. Animals (Basel) 2023; 13:ani13061056. [PMID: 36978597 PMCID: PMC10044621 DOI: 10.3390/ani13061056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
Genome instability can lead to a wide variety of diseases. Many endogenous and exogenous factors influence the level of damage to genetic material. Genome integrity depends on factors such as the fidelity of DNA replication, normal DNA organization in the chromosomes, and repair mechanisms. Genome stability influences fertility, embryonic development, and the maintenance of pregnancy. In the case of in vitro fertilization, it can be an important factor determining the success of the procedure. The aim of the study was to assess the stability of the genomes of recipient cows following in vitro fertilization using cytogenetic tests and to analyze the effects of selected vitamins and micro- and macroelements on genome integrity. Genome stability was analyzed using the sister chromatid exchange, fragile site, and comet assays. The material for analysis was peripheral blood from 20 Holstein-Friesian heifers that were embryo transfer recipients. The effect of selected micro- and macroelements and vitamins on the genome stability of the cows was analyzed. Folic acid was shown to significantly influence the level of damage identified using the SCE, FS, and SCGE assays, while iron affected SCE and SCGE results, and zinc affected FS.
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Costa MI, Sarmento-Ribeiro AB, Gonçalves AC. Zinc: From Biological Functions to Therapeutic Potential. Int J Mol Sci 2023; 24:ijms24054822. [PMID: 36902254 PMCID: PMC10003636 DOI: 10.3390/ijms24054822] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/16/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
The trace element zinc (Zn) displays a wide range of biological functions. Zn ions control intercellular communication and intracellular events that maintain normal physiological processes. These effects are achieved through the modulation of several Zn-dependent proteins, including transcription factors and enzymes of key cell signaling pathways, namely those involved in proliferation, apoptosis, and antioxidant defenses. Efficient homeostatic systems carefully regulate intracellular Zn concentrations. However, perturbed Zn homeostasis has been implicated in the pathogenesis of several chronic human diseases, such as cancer, diabetes, depression, Wilson's disease, Alzheimer's disease, and other age-related diseases. This review focuses on Zn's roles in cell proliferation, survival/death, and DNA repair mechanisms, outlines some biological Zn targets, and addresses the therapeutic potential of Zn supplementation in some human diseases.
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Affiliation(s)
- Maria Inês Costa
- Laboratory of Oncobiology and Hematology (LOH), University Clinics of Hematology and Oncology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR)—Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
| | - Ana Bela Sarmento-Ribeiro
- Laboratory of Oncobiology and Hematology (LOH), University Clinics of Hematology and Oncology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR)—Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Hematology Service, Centro Hospitalar e Universitário de Coimbra (CHUC), 3000-061 Coimbra, Portugal
| | - Ana Cristina Gonçalves
- Laboratory of Oncobiology and Hematology (LOH), University Clinics of Hematology and Oncology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR)—Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-480-023
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Kasparis G, Sangnier AP, Wang L, Efstathiou C, LaGrow AP, Sergides A, Wilhelm C, Thanh NTK. Zn doped iron oxide nanoparticles with high magnetization and photothermal efficiency for cancer treatment. J Mater Chem B 2023; 11:787-801. [PMID: 36472454 PMCID: PMC9890495 DOI: 10.1039/d2tb01338j] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Magnetic nanoparticles (NPs) are powerful agents to induce hyperthermia in tumours upon the application of an alternating magnetic field or an infrared laser. Dopants have been investigated to alter different properties of materials. Herein, the effect of zinc doping into iron oxide NPs on their magnetic properties and structural characteristics has been investigated in-depth. A high temperature reaction with autogenous pressure was used to prepare iron oxide and zinc ferrite NPs of same size and morphology for direct comparison. Pressure was key in obtaining high quality nanocrystals with reduced lattice strain (27% less) and enhanced magnetic properties. Zn0.4Fe2.6O4 NPs with small size of 10.2 ± 2.5 nm and very high saturation magnetisation of 142 ± 9 emu gFe+Zn-1 were obtained. Aqueous dispersion of the NPs showed long term magnetic (up to 24 months) and colloidal stability (at least 6 d) at physiologically mimicking conditions. The samples had been kept in the fridge and had been stable for four years. The biocompatibility of Zn0.4Fe2.6O4 NPs was next evaluated by metabolic activity, membrane integrity and clonogenic assays, which show an equivalence to that of iron oxide NPs. Zinc doping decreased the bandgap of the material by 22% making it a more efficient photothermal agent than iron oxide-based ones. Semiconductor photo-hyperthermia was shown to outperform magneto-hyperthermia in cancer cells, reaching the same temperature 17 times faster whilst using 20 times less material (20 mgFe+Zn ml-1vs. 1 mgFe+Zn ml-1). Magnetothermal conversion was minimally hindered in the cellular confinement whilst photothermal efficiency remained unchanged. Photothermia treatment alone achieved 100% cell death after 10 min of treatment compared to only 30% cell death achieved with magnetothermia at clinically relevant settings for each at their best performing concentration. Altogether, these results suggest that the biocompatible and superparamagnetic zinc ferrite NPs could be a next biomaterial of choice for photo-hyperthermia, which could outperform current iron oxide NPs for magnetic hyperthermia.
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Affiliation(s)
- Georgios Kasparis
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower street, London WC1E 6BT, UK. .,UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albemarle street, London W1S 4BS, UK
| | - Anouchka Plan Sangnier
- Laboratoire Physico Chimie Curie, PCC, CNRS UMR168, Institut Curie, Sorbonne University, PSL University, 75005 Paris, France.,Inserm, U1148, Laboratory for Vascular Translational Science, Université Paris 13, Sorbonne Paris Cité, Bobigny F-93017, France.
| | - Lilin Wang
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower street, London WC1E 6BT, UK. .,UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albemarle street, London W1S 4BS, UK
| | - Christoforos Efstathiou
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories21 Albemarle streetLondon W1S 4BSUK
| | - Alec P. LaGrow
- Biophysics Group, Department of Physics and Astronomy, University College LondonGower streetLondon WC1E 6BTUK,UCL Healthcare Biomagnetic and Nanomaterials Laboratories21 Albemarle streetLondon W1S 4BSUK
| | - Andreas Sergides
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower street, London WC1E 6BT, UK. .,UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albemarle street, London W1S 4BS, UK
| | - Claire Wilhelm
- Laboratoire Physico Chimie Curie, PCC, CNRS UMR168, Institut Curie, Sorbonne University, PSL University75005 ParisFrance
| | - Nguyen Thi Kim Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower street, London WC1E 6BT, UK. .,UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albemarle street, London W1S 4BS, UK
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Knez M, Boy E. Existing knowledge on Zn status biomarkers (1963-2021) with a particular focus on FADS1 and FADS2 diagnostic performance and recommendations for further research. Front Nutr 2023; 9:1057156. [PMID: 36712514 PMCID: PMC9878572 DOI: 10.3389/fnut.2022.1057156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 12/30/2022] [Indexed: 01/15/2023] Open
Abstract
The role of Zn in human health was discovered 60 years ago, and despite remarkable research efforts, a sufficiently sensitive and specific biomarker of Zn status is still lacking. Plasma/serum Zn, currently the best available and most accepted population Zn status indicator, responds well to severe Zn deficiency, yet, mild to moderate Zn deficiency states usually remain unrecognized. Identifying early-stage Zn deficiency requires additional robust markers of Zn status. This paper discusses the sensitivity, specificity, and responsiveness of plasma Zn concentrations to Zn interventions. It describes the biochemical and dietary basis for the causal association between Zn and fatty acid desaturases activity, FADS1 and FADS2, based on data collected through studies performed in animals and/or humans. The influence of potential confounders and covariates on the observed relationships is considered. Additional potential Zn biomarkers are discussed and suggestions for further research in this area are provided.
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Affiliation(s)
- Marija Knez
- Center of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia,*Correspondence: Marija Knez,
| | - Erick Boy
- HarvestPlus, International Food Policy Research Institute, Washington, DC, United States
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Shi H, Li X, Yu H, Shi W, Lin Y, Zhou Y. Potential effect of dietary zinc intake on telomere length: A cross-sectional study of US adults. Front Nutr 2022; 9:993425. [PMID: 36466397 PMCID: PMC9709254 DOI: 10.3389/fnut.2022.993425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 10/27/2022] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Telomere length, which is related to chronic diseases and premature mortality, is influenced by dietary factors. Zinc is known as a dietary antioxidant micronutrient, however, its impact on telomere length remains unclear. OBJECTIVE We aimed to examine the potential effect of dietary zinc intake on telomere length among middle-aged and older individuals in the US. MATERIALS AND METHODS Our study included 3,793 US participants aged 45 years and older from the 1999 to 2002 National Health and Nutrition Examination Survey (NHANES). 24-h dietary recall interviews were employed to evaluate zinc consumption. Leukocyte telomere length was assessed by real-time quantitative polymerase chain reaction (qPCR). We adopted generalized linear models to investigate the effect of dietary zinc intake on telomere length, and subgroup analyses were further applied. We further evaluated the dose-response relationship using restricted cubic spline analysis. RESULTS Among the 3,793 participants, the average telomere length was 0.926 ± 0.205 (T/S ratio) or 5509.5 ± 494.9 (bp). After adjusting for major confounders, every 5 mg increment in dietary zinc consumption was related to 0.64% (95% CI: 0.17%, 1.10%) longer telomere length. In the subgroup analyses, significant relationships were found in females (Percentage change: 1.11%; 95% CI: 0.48%, 1.75%), obese (Percentage change: 0.88%; 95% CI: 0.26%, 1.50%), and low energy intake individuals (Percentage change: 0.99%; 95% CI: 0.51%, 1.46%). Additionally, we revealed a positive linear relationship between dietary zinc intake and telomere length (P for non-linearity = 0.636). CONCLUSION Our study revealed that elevated dietary zinc intake was significantly related to longer telomere length among adults aged 45 years and older in the US. And the association was more pronounced in females, obese, and low energy intake individuals.
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Affiliation(s)
- Huanchen Shi
- School of Medicine, Qingdao University, Qingdao, China
| | - Xiaoxuan Li
- School of Medicine, Qingdao University, Qingdao, China
| | - Haihong Yu
- School of Medicine, Qingdao University, Qingdao, China
| | - Wanting Shi
- School of Medicine, Qingdao University, Qingdao, China
| | - Yue Lin
- School of Medicine, Qingdao University, Qingdao, China
| | - Yunping Zhou
- School of Nursing, Qingdao University, Qingdao, China
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Zinc Fortification: Current Trends and Strategies. Nutrients 2022; 14:nu14193895. [PMID: 36235548 PMCID: PMC9572300 DOI: 10.3390/nu14193895] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/13/2022] [Accepted: 09/16/2022] [Indexed: 11/17/2022] Open
Abstract
Zinc, through its structural and cofactor roles, affects a broad range of critical physiological functions, including growth, metabolism, immune and neurological functions. Zinc deficiency is widespread among populations around the world, and it may, therefore, underlie much of the global burden of malnutrition. Current zinc fortification strategies include biofortification and fortification with zinc salts with a primary focus on staple foods, such as wheat or rice and their products. However, zinc fortification presents unique challenges. Due to the influences of phytate and protein on zinc absorption, successful zinc fortification strategies should consider the impact on zinc bioavailability in the whole diet. When zinc is absorbed with food, shifts in plasma zinc concentrations are minor. However, co-absorbing zinc with food may preferentially direct zinc to cellular compartments where zinc-dependent metabolic processes primarily occur. Although the current lack of sensitive biomarkers of zinc nutritional status reduces the capacity to assess the impact of fortifying foods with zinc, new approaches for assessing zinc utilization are increasing. In this article, we review the tools available for assessing bioavailable zinc, approaches for evaluating the zinc nutritional status of populations consuming zinc fortified foods, and recent trends in fortification strategies to increase zinc absorption.
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Likoswe BH, Lark RM, Phuka J, Maleta K, Joy E, Lowe NM. The potential of spot urine as a biomarker for zinc assessment in Malawian children and adults. Front Nutr 2022; 9:890209. [PMID: 35938137 PMCID: PMC9355503 DOI: 10.3389/fnut.2022.890209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 06/29/2022] [Indexed: 11/13/2022] Open
Abstract
Population-level assessment of zinc deficiency remains a challenge due to the lack of suitable biomarkers. Spot urinary zinc concentration (UZC) has the potential to provide information on population zinc status in large-scale surveys, but there is no established cut-off point indicating deficiency. A strong correlation between this biomarker and an established biomarker such as serum zinc concentration (SZC) in paired samples (i.e., from the same individual), could identify the thresholds indicating zinc deficiency. This study, therefore, aimed to regress spot UZC from school-aged children and women from the Malawi micronutrient survey with paired SZC data using a linear mixed-effects model. The nested variance components indicated no linear relationship between the UZC and SZC data, irrespective of adjustments for inflammation and hydration. Thresholds of urinary zinc excretion that have been suggested by expert panels were applied to the spot UZC data, as a post-hoc analysis. The zinc deficiency prevalence estimates derived from these suggested thresholds were not similar to the estimates from the SZC data, and further research is required to understand whether spot UZC can still provide useful information in population zinc assessment.
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Affiliation(s)
- Blessings H. Likoswe
- Department of Nutrition and Dietetics, School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
- *Correspondence: Blessings H. Likoswe ;
| | - R. Murray Lark
- School of Biosciences, University of Nottingham, Loughborough, United Kingdom
| | - John Phuka
- Department of Nutrition and Dietetics, School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Kenneth Maleta
- Department of Nutrition and Dietetics, School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Edward Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Nicola M. Lowe
- UCLan Research Centre for Global Development, University of Central Lancashire, Preston, United Kingdom
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13
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Gupta S, Zaman M, Fatima S, Shahzad B, Brazier AKM, Moran VH, Broadley MR, Zia MH, Bailey EH, Wilson L, Khan IM, Sinclair JK, Lowe NM. The Impact of Consuming Zinc-Biofortified Wheat Flour on Haematological Indices of Zinc and Iron Status in Adolescent Girls in Rural Pakistan: A Cluster-Randomised, Double-Blind, Controlled Effectiveness Trial. Nutrients 2022; 14:nu14081657. [PMID: 35458222 PMCID: PMC9026921 DOI: 10.3390/nu14081657] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 02/05/2023] Open
Abstract
Biofortification of wheat is potentially a sustainable strategy to improve zinc intake; however, evidence of its effectiveness is needed. A household-based, double-blind, cluster-randomized controlled trial (RCT) was conducted in rural Pakistan. The primary objective was to examine the effects of consuming zinc-biofortified wheat flour on the zinc status of adolescent girls aged 10−16 years (n = 517). Households received either zinc-biofortified flour or control flour for 25 weeks; blood samples and 24-h dietary recalls were collected for mineral status and zinc intake assessment. Plasma concentrations of zinc (PZC), selenium and copper were measured via inductively coupled plasma mass spectrometry and serum ferritin (SF), transferrin receptor, alpha 1-acid glycoprotein and C-reactive protein by immunoassay. Consumption of the zinc-biofortified flour resulted in a moderate increase in intakes of zinc (1.5 mg/day) and iron (1.2 mg/day). This had no significant effect on PZC (control 641.6 ± 95.3 µg/L vs. intervention 643.8 ± 106.2 µg/L; p = 0.455), however there was an overall reduction in the rate of storage iron deficiency (SF < 15 µg/L; control 11.8% vs. 1.0% intervention). Consumption of zinc-biofortified flour increased zinc intake (21%) but was not associated with an increase in PZC. Establishing a sensitive biomarker of zinc status is an ongoing priority.
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Affiliation(s)
- Swarnim Gupta
- Lancashire Research Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, UK; (S.G.); (A.K.M.B.); (V.H.M.); (J.K.S.)
| | - Mukhtiar Zaman
- Department of Pulmonology, Rehman Medical Institute, Peshawar 25000, Pakistan;
| | - Sadia Fatima
- Institute of Basic Medical Sciences, Khyber Medical University, Peshawar 25100, Pakistan; (S.F.); (B.S.)
| | - Babar Shahzad
- Institute of Basic Medical Sciences, Khyber Medical University, Peshawar 25100, Pakistan; (S.F.); (B.S.)
| | - Anna K. M. Brazier
- Lancashire Research Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, UK; (S.G.); (A.K.M.B.); (V.H.M.); (J.K.S.)
| | - Victoria H. Moran
- Lancashire Research Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, UK; (S.G.); (A.K.M.B.); (V.H.M.); (J.K.S.)
| | - Martin R. Broadley
- School of Biosciences, Sutton Bonington Campus, University of Nottingham, Leicester NG7 2RD, UK; (M.R.B.); (E.H.B.); (L.W.)
- Rothamsted Research, West Common, Harpenden AL5 2JQ, UK
| | - Munir H. Zia
- Research and Development Department, Fauji Fertilizer Co., Ltd., Rawalpindi 46000, Pakistan;
| | - Elizabeth H. Bailey
- School of Biosciences, Sutton Bonington Campus, University of Nottingham, Leicester NG7 2RD, UK; (M.R.B.); (E.H.B.); (L.W.)
| | - Lolita Wilson
- School of Biosciences, Sutton Bonington Campus, University of Nottingham, Leicester NG7 2RD, UK; (M.R.B.); (E.H.B.); (L.W.)
| | - Iqbal M. Khan
- Department of Pathology, Rehman Medical Institute, Peshawar 25000, Pakistan;
| | - Jonathan K. Sinclair
- Lancashire Research Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, UK; (S.G.); (A.K.M.B.); (V.H.M.); (J.K.S.)
| | - Nicola M. Lowe
- Lancashire Research Centre for Global Development, University of Central Lancashire, Preston PR1 2HE, UK; (S.G.); (A.K.M.B.); (V.H.M.); (J.K.S.)
- Correspondence: ; Tel.: +44-(0)-1772-89-3599
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14
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Suh JH, Zyba SJ, Shigenaga M, McDonald CM, King JC. Marginal Zinc Deficiency Alters Essential Fatty Acid Metabolism in Healthy Men. J Nutr 2022; 152:671-679. [PMID: 34919682 PMCID: PMC9076996 DOI: 10.1093/jn/nxab425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/29/2021] [Accepted: 12/09/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Rice biofortification with Zinc (Zn) can improve the Zn status of rice-consuming populations. However, the metabolic impact in humans consuming Zn-biofortified rice is unknown. OBJECTIVES To determine the effects of Zn-biofortified rice on lipid metabolism in normolipidemic men. METHODS The men consumed a rice-based diet containing 6 mg Zn/d and 1.5 g phytate (phytate/Zn ratio = 44) for 2 wk followed by a 10-mg Zn/d diet without phytate for 4 wk. An ad libitum diet supplemented with 25 mg Zn/d was then fed for 3 wk. Fasting blood samples were taken at baseline and at the end of each metabolic period for measuring plasma zinc, glucose, insulin, triglyceride (TG), LDL and HDL cholesterol, fatty acids, oxylipins, and fatty acid desaturase activities. Statistical differences were assessed by linear mixed model. RESULTS Fatty acid desaturase (FADS) 1 activity decreased by 29.1% (P = 0.007) when the 6-mg Zn/d diet was consumed for 2 wk. This change was associated with significant decreases in HDL and LDL cholesterol. The alterations in FADS1, HDL cholesterol, and TG remained unchanged when Zn intakes were increased to 10 mg/d for 4 wk. Supplementation with 25 mg Zn/d for 3 wk normalized these metabolic changes and significantly increased LDL cholesterol at the end of this metabolic period compared with baseline. FADS1 activity was inversely correlated with FADS2 (rmcorr = -0.52; P = 0.001) and TG (rmcorr = -0.55; P = 0.001) at all time points. CONCLUSIONS A low-zinc, high-phytate rice-based diet reduced plasma HDL cholesterol concentrations and altered fatty acid profiles in healthy men within 2 wk. Consuming 10 mg Zn/d without phytate for 4 wk did not improve the lipid profiles, but a 25-mg Zn/d supplement corrects these alterations in lipid metabolism within 3 wk.
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Affiliation(s)
- Jung H Suh
- UCSF Benioff Children's Hospital Oakland Research Institute, Oakland, CA, USA
| | - Sarah J Zyba
- UCSF Benioff Children's Hospital Oakland Research Institute, Oakland, CA, USA
- Institute for Global Nutrition Department of Nutrition University of California, Davis, CA, USA
| | - Mark Shigenaga
- UCSF Benioff Children's Hospital Oakland Research Institute, Oakland, CA, USA
| | | | - Janet C King
- UCSF Benioff Children's Hospital Oakland Research Institute, Oakland, CA, USA
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
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15
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Costa MI, Lapa BS, Jorge J, Alves R, Carreira IM, Sarmento-Ribeiro AB, Gonçalves AC. Zinc Prevents DNA Damage in Normal Cells but Shows Genotoxic and Cytotoxic Effects in Acute Myeloid Leukemia Cells. Int J Mol Sci 2022; 23:ijms23052567. [PMID: 35269710 PMCID: PMC8910549 DOI: 10.3390/ijms23052567] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 02/01/2023] Open
Abstract
Genomic instability is prevented by the DNA damage response (DDR). Micronutrients, like zinc (Zn), are cofactors of DDR proteins, and micronutrient deficiencies have been related to increased cancer risk. Acute myeloid leukemia (AML) patients commonly present Zn deficiency. Moreover, reports point to DDR defects in AML. We studied the effects of Zn in DDR modulation in AML. Cell lines of AML (HEL) and normal human lymphocytes (IMC) were cultured in standard culture, Zn depletion, and supplementation (40 μM ZnSO4) conditions and exposed to hydrogen peroxide (H2O2) or ultraviolet (UV) radiation. Chromosomal damage, cell death, and nuclear division indexes (NDI) were assessed through cytokinesis-block micronucleus assay. The phosphorylated histone H2AX (yH2AX) expression was monitored at 0 h, 1 h, and 24 h after exposure. Expression of DDR genes was evaluated by quantitative real time polymerase chain reaction (qPCR). Zn supplementation increased the genotoxicity of H2O2 and UV radiation in AML cells, induced cytotoxic and antiproliferative effects, and led to persistent yH2AX activation. In contrast, in normal lymphocytes, supplementation decreased damage rates, while Zn depletion favored damage accumulation and impaired repair kinetics. Gene expression was not affected by Zn depletion or supplementation. Zn presented a dual role in the modulation of genome damage, preventing damage accumulation in normal cells and increasing genotoxicity and cytotoxicity in AML cells.
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Affiliation(s)
- Maria Inês Costa
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
| | - Beatriz Santos Lapa
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
| | - Joana Jorge
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Raquel Alves
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Isabel Marques Carreira
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Cytogenetics and Genomics Laboratory, Faculty of Medicine, University of Coimbra, 3004-531 Coimbra, Portugal
| | - Ana Bela Sarmento-Ribeiro
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Hematology Service, Centro Hospitalar e Universitário de Coimbra (CHUC), 3000-061 Coimbra, Portugal
| | - Ana Cristina Gonçalves
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal; (M.I.C.); (B.S.L.); (J.J.); (R.A.); (A.B.S.-R.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Group of Environmental Genetics of Oncobiology (CIMAGO), Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-480-023
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16
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Distribution and Determinants of Serum Zinc, Copper, and Selenium Levels among Children under Five Years from Popokabaka, Democratic Republic of Congo: A Cross-Sectional Study. Nutrients 2022; 14:nu14030683. [PMID: 35277041 PMCID: PMC8839910 DOI: 10.3390/nu14030683] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/31/2022] [Accepted: 02/03/2022] [Indexed: 01/27/2023] Open
Abstract
Information about essential trace elements among children in many African countries, including the Democratic Republic of Congo (DRC), is limited. We aimed to measure the distribution and determinants of serum zinc (Zn), copper (Cu), and selenium (Se) concentrations in a representative sample of children under five years old. We conducted a community-based cross-sectional study in Popokabaka, DRC. Blood samples were drawn from 412 children. The serum concentrations of minerals were measured using inductively coupled plasma−mass spectrometry. The median concentrations (P25−P75) of Zn, Cu, and Se were 61.9 µg/dL (52.8−70.2), 145.5 (120.0−167.0) µg/dL and 5.3 (4.3−6.3) µg/dL. The CRP-adjusted prevalence of serum Se deficiency was 84.1% (95% confidence interval [CI] 81.4−87.0) and of Zn deficiency was 64.6% (95% CI 59.8−69.1%). Only a few children were Cu deficient [1.5% (0.6−3.2)]. Evidence of inflammation (C-reactive protein, >5 mg/L) was associated with a lower Se concentration and higher Cu concentration. Furthermore, serum Se concentration was positively associated with linear growth. The average Cu/Zn molar ratio (2:1) was twice that recommended. Children in western Popokabaka had higher Zn and Se levels than their eastern neighbors. Zinc and selenium deficiencies are common among children in Popokabaka and require attention and prioritization.
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Baarz BR, Rink L. Rebalancing the unbalanced aged immune system - A special focus on zinc. Ageing Res Rev 2022; 74:101541. [PMID: 34915196 DOI: 10.1016/j.arr.2021.101541] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 11/18/2021] [Accepted: 12/09/2021] [Indexed: 02/08/2023]
Abstract
Nowadays, aging is understood as a dynamic and multifaceted dysregulation process that spares almost no human organ or cell. The immune system being among the most affected, it has been shown predominantly that its integrity determines the tightrope walk between the difference of escaping or suffering from age-related diseases. Next to drug-based anti-aging strategies, micronutrient intervention may represent an emerging but less radical way to slow immune aging. While a sufficient supply of a variety of micronutrients is undeniably important, adequate intake of the trace element zinc appears to tower over others in terms of reaching old age. Inconveniently, zinc deficiency prevalence among the elderly is high, which in turn contributes to increased susceptibility to infection, decreased anti-tumor immunity as well as attenuated response to vaccination. Driven by this research, this review aims to provide a comprehensive and up-to-date overview of the various rebalancing capabilities of zinc in the unbalanced immune system of the elderly. This includes an in-depth and cell type-centered discussion on the role of zinc in immunosenescence and inflammaging. We further address upcoming translational aspects e.g. how zinc deficiency promotes the flourishing of certain pathogenic taxa of the gut microbiome and how zinc supply counteracts such alterations in a manner that may contribute to longevity. In the light of the ongoing COVID-19 pandemic, we also briefly review current knowledge on the interdependency between age, zinc status, and respiratory infections. Based on two concrete examples and considering the latest findings in the field we conclude our remarks by outlining tremendous parallels between suboptimal zinc status and accelerated aging on the one hand and an optimized zinc status and successful aging on the other hand.
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18
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Ho E, Wong CP, King JC. Impact of zinc on DNA integrity and age-related inflammation. Free Radic Biol Med 2022; 178:391-397. [PMID: 34921929 DOI: 10.1016/j.freeradbiomed.2021.12.256] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/22/2021] [Accepted: 12/09/2021] [Indexed: 02/08/2023]
Abstract
Dr. Bruce Ames was a pioneer in understanding the role of oxidative stress and DNA damage, and in the 1990s began to make connections between micronutrient deficiencies and DNA damage. Zinc is an essential micronutrient for human health and a key component for the function of numerous cellular processes. In particular, zinc plays a critical role in cellular antioxidant defense, the maintenance of DNA integrity and is also essential for the normal development and function of the immune system. This review highlights the work helping connect zinc deficiency to oxidative stress, susceptibility to DNA damage and chronic inflammation that was initiated while working with Dr. Ames. This review outlines the body of work in this area, from cells to humans. The article also reviews the unique challenges of maintaining zinc status as we age and the interplay between zinc deficiency and age-related inflammation and immune dysfunction. Several micronutrient deficiencies, including zinc deficiency, can drastically affect the risk of many chronic diseases and underscores the importance of adequate nutrition for healthy aging.
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Affiliation(s)
- Emily Ho
- Linus Pauling Institute, 307 Linus Pauling Science Center, Oregon State University, Corvallis, OR, 97331, USA; School of Biological and Population Health Sciences, 101 Milam Hall, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, 97331, USA.
| | - Carmen P Wong
- Linus Pauling Institute, 307 Linus Pauling Science Center, Oregon State University, Corvallis, OR, 97331, USA; School of Biological and Population Health Sciences, 101 Milam Hall, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, 97331, USA
| | - Janet C King
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, 94720, USA
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19
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Massih YN, Hall AG, Suh J, King JC. Zinc Supplements Taken with Food Increase Essential Fatty Acid Desaturation Indices in Adult Men Compared with Zinc Taken in the Fasted State. J Nutr 2021; 151:2583-2589. [PMID: 34236435 DOI: 10.1093/jn/nxab149] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/10/2021] [Accepted: 04/26/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Zinc intake is associated with reduced risk of metabolic disease in adults, possibly due in part to zinc's role in essential fatty acid (EFA) desaturation. Although plasma zinc is the accepted indicator of zinc status, product-to-precursor activity indices of fatty acid desaturase (FADS) 1 and 2 have also been proposed as response indicators for changes in zinc intake. OBJECTIVES To examine zinc supplement effects on plasma zinc concentration (PZC) and estimated FADS 1 and 2 activities, when zinc supplements are taken with food compared with fasted. METHODS Apparently healthy adult men were randomly allocated to take 25 mg zinc as zinc gluconate either in the fasted state 30 min before breakfast [zinc before breakfast (ZBB)] or with breakfast [zinc with breakfast (ZWB)] daily for 13 d. Fasting PZC was measured by inductively coupled plasma optical emission spectrometry. Selected EFAs for FADS activity indices were measured by LC-MS/MS at study baseline and end. RESULTS A total of 35 men completed the study (ZBB, n = 18; ZWB, n = 17). Mean ± SEM PZC was 86.2 ± 1.64 μg/dL at baseline. After 2 wk of zinc supplementation, the PZCs were 18% higher in the ZBB compared with the ZWB groups (105 ± 5.88 compared with 88.7 ± 2.36 μg/dL, P = < 0.05). However, the geometric mean (95% CI) FADS1 activity indices were 15% higher in the ZWB than the ZBB participants, 6.45 (5.84, 7.13) compared with 5.57 (5.05, 6.14), P < 0.05. CONCLUSIONS These data demonstrate a lack of congruence between the effects of zinc supplements on PZC and EFA metabolism in response to whether a zinc supplement is taken with or without food. Additional research is needed to determine how absorbed zinc may be directed differently toward metabolic processes, when coabsorbed with food. This trial was registered at clinicaltrials.gov as NCT03619421.
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Affiliation(s)
- Yasaman N Massih
- Children's Hospital Oakland Research Institute, UCSF Benioff Children's Hospital Oakland, Oakland, CA, USA.,Department of Nutritional Sciences & Toxicology, University of California, Berkeley, CA, USA
| | - Andrew G Hall
- Children's Hospital Oakland Research Institute, UCSF Benioff Children's Hospital Oakland, Oakland, CA, USA.,Department of Nutritional Sciences & Toxicology, University of California, Berkeley, CA, USA
| | - Jung Suh
- Children's Hospital Oakland Research Institute, UCSF Benioff Children's Hospital Oakland, Oakland, CA, USA
| | - Janet C King
- Children's Hospital Oakland Research Institute, UCSF Benioff Children's Hospital Oakland, Oakland, CA, USA.,Department of Nutritional Sciences & Toxicology, University of California, Berkeley, CA, USA
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20
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Badri H, Polya DA, Povey AC. Geochemical compositional controls on DNA strand breaks induced in in vitro cell-free assays by crushed rock powders from the Panasqueira mine area, Portugal. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:2631-2647. [PMID: 32648060 PMCID: PMC8275547 DOI: 10.1007/s10653-020-00653-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 06/24/2020] [Indexed: 06/11/2023]
Abstract
DNA strand breaks are a common form of DNA damage that can contribute to chromosomal instability or gene mutations. Such strand breaks may be caused by exposure to heavy metals. The aim of this study was to assess the level of DNA strand breaks caused by µm-scale solid particles of known chemical composition with elevated heavy metals/metalloids, notably arsenic, using an in vitro cell-free DNA plasmid scission assay. These samples were incubated with and without H2O2 to see whether damage occurs directly or indirectly through the Fenton reaction. Levels of DNA damage in the absence of H2O2 were < 10%, but in the presence of H2O2, all samples showed higher levels of damage ranging from 10 to 100% suggesting that damage was being incurred through the Fenton reaction. Using bivariate correlation analysis and multiple linear regression, manganese oxide (MnO), sulphur (S), copper (Cu), and zinc (Zn) concentrations in the particulates were found to be the most significant predictors of DNA damage. The mechanism of this DNA damage formation has yet to be thoroughly investigated but is hypothesised to be due to reactive oxygen species formation. Further work is required to assess the extent of contribution of reactive oxygen species to this DNA damage, but this study highlights the potential role of chemistry and/or mineralogy to the extent and/or nature of DNA damage caused by particulates.
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Affiliation(s)
- Hatim Badri
- Department of Earth and Environmental Sciences and Williamson Research Centre for Molecular Environmental Science, University of Manchester, Williamson Building, Oxford Road, Manchester, M13 9PL, UK
- Department of Environmental Health, College of Public Health and Health Informatics, Umm Al-Qura University, Makkah, Saudi Arabia
| | - David A Polya
- Department of Earth and Environmental Sciences and Williamson Research Centre for Molecular Environmental Science, University of Manchester, Williamson Building, Oxford Road, Manchester, M13 9PL, UK.
| | - Andrew C Povey
- Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, Faculty of Medicine, Biology and Health, University of Manchester, Manchester, M13 9PL, UK
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21
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Liong EM, McDonald CM, Suh J, Westcott JL, Wong CP, Signorell C, King JC. Zinc-Biofortified Wheat Intake and Zinc Status Biomarkers in Men: Randomized Controlled Trial. J Nutr 2021; 151:1817-1823. [PMID: 34036355 DOI: 10.1093/jn/nxab092] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/16/2020] [Accepted: 03/15/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Biofortification is a novel method for improving the nutritional value of grains. Wheat is widely consumed worldwide. Thus, wheat zinc biofortification may improve the zinc status of populations. OBJECTIVES We determined the effect of consuming zinc-biofortified wheat on plasma zinc concentrations and biomarkers of zinc-dependent functions in a controlled feeding study. METHODS Thirty-six healthy adult men, aged 18 to 51 y, participated in a 10-wk zinc-controlled feeding trial. After a 2-wk run-in period [metabolic period (MP) 1] (9.3 mg zinc/d and 2.1 g total phytate/d) to standardize zinc status, the participants consumed bread made from zinc-biofortified wheat (10.9 mg zinc/d) with no additional phytate (0.6 g/d total phytate) for 6 wk (MP2). During the final 2 wk (MP3), half of the men took a 25-mg zinc supplement daily to determine if the supplement further altered zinc status biomarkers. Repeated-measures linear regression methods were used to compare plasma zinc concentrations, fatty acid desaturase (FADS) activities, glutathione (GSH) concentrations, and DNA strand breaks assessed at enrollment and the end of each metabolic period. RESULTS Plasma zinc concentrations did not change throughout the study. From the end of MP1 to the end of MP2, the conversion of linoleic acid to γ-linolenic acid (FADS2 activity) increased from 0.020 to 0.025 (P = 0.02), and the conversion of dihomo-γ-linolenic acid to arachidonic acid (FADS1 activity) decreased from 6.37 to 5.53 (P = 0.01). GSH concentrations and DNA strand breaks did not change. Zinc supplementation (25 mg/d) in MP3 did not alter any of the endpoints. CONCLUSIONS In healthy adult men, a 1.6-mg/d increase in dietary zinc from biofortified wheat modified FADS2 and FADS1 activities without changing DNA damage, plasma zinc, or GSH concentrations, demonstrating that FADS activities are more sensitive to small changes in zinc consumed with a meal. This trial was registered at clinicaltrials.gov as NCT03451214.
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Affiliation(s)
- Erinn M Liong
- Children's Hospital Oakland Research Institute, Oakland, CA, USA
| | - Christine M McDonald
- Children's Hospital Oakland Research Institute, Oakland, CA, USA.,Department of Pediatrics, University of California, San Francisco, CA, USA
| | - Jung Suh
- Children's Hospital Oakland Research Institute, Oakland, CA, USA
| | | | - Carmen P Wong
- School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR, USA
| | | | - Janet C King
- Children's Hospital Oakland Research Institute, Oakland, CA, USA.,Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
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Ge M, Tian H, Mao L, Li D, Lin J, Hu H, Huang S, Zhang C, Mei X. Zinc attenuates ferroptosis and promotes functional recovery in contusion spinal cord injury by activating Nrf2/GPX4 defense pathway. CNS Neurosci Ther 2021; 27:1023-1040. [PMID: 33951302 PMCID: PMC8339532 DOI: 10.1111/cns.13657] [Citation(s) in RCA: 109] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 12/20/2022] Open
Abstract
AIM Spinal cord injury (SCI) involves multiple pathological processes. Ferroptosis has been shown to play a critical role in the injury process. We wanted to explore whether zinc can inhibit ferroptosis, reduce inflammation, and then exert a neuroprotective effect. METHODS The Alice method was used to establish a spinal cord injury model. The Basso Mouse Scale (BMS), Nissl staining, hematoxylin-eosin staining, and immunofluorescence analysis were used to investigate the protective effect of zinc on neurons on spinal cord neurons and the recovery of motor function. The regulation of the nuclear factor E2/heme oxygenase-1 (NRF2/HO-1) pathway was assessed, the levels of essential ferroptosis proteins were measured, and the changes in mitochondria were confirmed by transmission electron microscopy and 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining. In vitro experiments using VSC4.1 (spinal cord anterior horn motor neuroma cell line), 4-hydroxynonenal (4HNE), reactive oxygen species (ROS), superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), lipid peroxides, and finally the levels of inflammatory factors were detected to assess the effect of zinc. RESULTS Zinc reversed behavioral and structural changes after SCI. Zinc increased the expression of NRF2/HO-1, thereby increasing the content of glutathione peroxidase 4 (GPX4), SOD, and GHS and reducing the levels of lipid peroxides, MDA, and ROS. Zinc also rescued injured mitochondria and effectively reduced spinal cord injury and the levels of inflammatory factors, and the NRF2 inhibitor Brusatol reversed the effects of zinc. CONCLUSION Zinc promoted the degradation of oxidative stress products and lipid peroxides through the NRF2/HO-1 and GPX4 signaling pathways to inhibit ferroptosis in neurons.
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Affiliation(s)
- Ming‐hao Ge
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - He Tian
- Department of Histology and EmbryologyJinzhou Medical UniversityJinzhouChina
| | - Liang Mao
- Department of OncologyThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Dao‐yong Li
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Jia‐quan Lin
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Heng‐shuo Hu
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Shuo‐cheng Huang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Chuan‐jie Zhang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Xi‐fan Mei
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
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23
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Pompano LM, Boy E. Effects of Dose and Duration of Zinc Interventions on Risk Factors for Type 2 Diabetes and Cardiovascular Disease: A Systematic Review and Meta-Analysis. Adv Nutr 2021; 12:141-160. [PMID: 32722790 PMCID: PMC7850144 DOI: 10.1093/advances/nmaa087] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/15/2020] [Accepted: 06/25/2020] [Indexed: 12/11/2022] Open
Abstract
No meta-analysis has examined the effect of dose and duration of zinc interventions on their impact on risk factors for type 2 diabetes (T2D) or cardiovascular disease (CVD). This study aimed first to compare the effects of zinc interventions dichotomized as low versus high dose (<25 mg/d and ≥25 mg/d, respectively) and short versus long duration (<12 wk and ≥12 wk, respectively) on risk factors for T2D and CVD. Second, it discusses the results from the low-dose and long-duration meta-analyses as a foundation for understanding what impact a zinc-biofortification intervention could have on these risk factors. The PubMed and Cochrane Review databases were searched through January 2020 for full-text, human studies providing zinc supplements (alone) at doses ≤75 mg/d and a placebo. Data on study and sample characteristics and several T2D and CVD risk factors were extracted. There were 1042 and 974 participants receiving zinc and placebo, respectively, from 27 studies. Low-dose zinc supplementation (<25 mg/d) significantly benefited fasting blood glucose, insulin resistance, triglycerides, total cholesterol, and LDL cholesterol. High-dose zinc supplementation (≥25 mg/d) benefited glycated hemoglobin and insulin resistance. Short-duration interventions (<12 wk) benefited fasting blood glucose, insulin resistance, and triglycerides, while long-duration studies (≥12 wk) benefited fasting blood glucose, triglycerides, and total and LDL cholesterol. Effect sizes for low-dose and long-duration interventions were of equal or greater magnitude to those from high-dose or short-duration interventions. Low-dose and long-duration zinc supplementation each improved more risk factors for T2D and CVD than high-dose and short-duration interventions, respectively. It is currently unknown whether low doses of zinc delivered over long durations via a biofortified crop would similarly impact these risk factors. However, this review suggests that low-dose, long-duration zinc intake from supplements, and potentially biofortification, can benefit risk factors for T2D and CVD.
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Affiliation(s)
- Laura M Pompano
- HarvestPlus, International Food Policy Research Institute, Washington, DC, USA
| | - Erick Boy
- HarvestPlus, International Food Policy Research Institute, Washington, DC, USA
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24
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Gibson RS, Rahmannia S, Diana A, Leong C, Haszard JJ, Hampel D, Reid M, Erhardt J, Suryanto AH, Sofiah WN, Fathonah A, Shahab-Ferdows S, Allen LH, Houghton LA. Association of maternal diet, micronutrient status, and milk volume with milk micronutrient concentrations in Indonesian mothers at 2 and 5 months postpartum. Am J Clin Nutr 2020; 112:1039-1050. [PMID: 32844187 PMCID: PMC7528569 DOI: 10.1093/ajcn/nqaa200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 06/29/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Maternal micronutrient deficits during preconception and pregnancy may persist during lactation and compromise human milk composition. OBJECTIVE We measured micronutrient concentrations in human milk and investigated their association with maternal micronutrient intakes, status, and milk volume. METHODS Infant milk intake (measured via a deuterium dose-to-mother technique), milk micronutrient and fat concentrations, and maternal micronutrient intakes were assessed at 2 and 5 mo postpartum in 212 Indonesian lactating mother-infant pairs. Maternal hemoglobin, ferritin, transferrin receptors, retinol binding protein (RBP), zinc, selenium, and vitamin B-12 were measured at 5 mo (n = 163). Multivariate or mixed effects regression examined associations of milk micronutrient concentrations with maternal micronutrient intakes, status, and milk volume. RESULTS Prevalence of anemia (15%), and iron (15% based on body iron), selenium (2.5%), and vitamin B-12 deficiency (0%) were low compared with deficiencies of zinc (60%) and vitamin A (34%). The prevalence of inadequate intakes was >50% for 7 micronutrients at 2 and 5 mo. Median milk concentrations for most micronutrients were below reference values, and nearly all declined between 2 and 5 mo postpartum and were not associated substantially with milk volume (except for β-carotene, α-carotene, and β-cryptoxanthin). At 5 mo postpartum, associations between maternal micronutrient status and corresponding milk concentrations reported as mean percentage difference in human milk concentration for each unit higher maternal biomarker were significant for hemoglobin (1.9%), iron biomarkers (ranging from 0.4 to 7%), RBP (35%), selenium (70%), and vitamin B-12 (0.1%), yet for maternal intakes only a positive association with β-carotene existed. CONCLUSIONS Most milk micronutrient concentrations declined during lactation, independent of changes in human milk production, and few were associated with maternal micronutrient intakes. The significant associations between maternal biomarkers and milk micronutrient concentrations at 5 mo warrant further study to investigate whether the declines in milk micronutrients are linked to shifts in maternal status.
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Affiliation(s)
- Rosalind S Gibson
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Sofa Rahmannia
- Faculty of Medicine, Universitas Padjadjaran, West Java, Indonesia
| | - Aly Diana
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
- Faculty of Medicine, Universitas Padjadjaran, West Java, Indonesia
| | - Claudia Leong
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Jillian J Haszard
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Daniela Hampel
- USDA/ARS Western Human Nutrition Research Center, Davis, CA, USA
- Department of Nutrition, University of California, Davis, CA, USA
| | - Malcolm Reid
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | | | | | - Wina Nur Sofiah
- Faculty of Medicine, Universitas Padjadjaran, West Java, Indonesia
| | - Annisha Fathonah
- Faculty of Medicine, Universitas Padjadjaran, West Java, Indonesia
| | - Setareh Shahab-Ferdows
- USDA/ARS Western Human Nutrition Research Center, Davis, CA, USA
- Department of Nutrition, University of California, Davis, CA, USA
| | - Lindsay H Allen
- USDA/ARS Western Human Nutrition Research Center, Davis, CA, USA
- Department of Nutrition, University of California, Davis, CA, USA
| | - Lisa A Houghton
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
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25
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Balaji E V, Kumar N, Satarker S, Nampoothiri M. Zinc as a plausible epigenetic modulator of glioblastoma multiforme. Eur J Pharmacol 2020; 887:173549. [PMID: 32926916 DOI: 10.1016/j.ejphar.2020.173549] [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] [Received: 06/24/2020] [Revised: 08/26/2020] [Accepted: 09/09/2020] [Indexed: 01/04/2023]
Abstract
Glioblastoma Multiforme (GBM) is an aggressive brain tumor (WHO grade 4 astrocytoma) with unknown causes and is associated with a reduced life expectancy. The available treatment options namely radiotherapy, surgery and chemotherapy have failed to improve life expectancy. Out of the various therapeutic approaches, epigenetic therapy is one of the most studied. Epigenetic therapy is involved in the effective treatment of GBM by inhibiting DNA methyltransferase, histone deacetylation and non-coding RNA. It also promotes the expression of the tumor suppressor gene and is involved in the suppression of the oncogene. Various targets are being studied to implement proper epigenetic regulation to control GBM effectively. Zinc is one of the micronutrients which is considered to maintain epigenetic regulation by promoting the proper DNA folding, protecting genetic material from the oxidative damage and controlling the enzyme activation involved in the epigenetic regulation. Here, we are discussing the importance of zinc in regulating the epigenetic modifications and assessing its role in glioblastoma research. The discussion also highlights the importance of artificial intelligence using epigenetics for envisaging the glioma progression, diagnosis and its management.
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Affiliation(s)
- Vignesh Balaji E
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Nitesh Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Sairaj Satarker
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Madhavan Nampoothiri
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, India.
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26
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Ahsin M, Hussain S, Rengel Z, Amir M. Zinc status and its requirement by rural adults consuming wheat from control or zinc-treated fields. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:1877-1892. [PMID: 31696401 DOI: 10.1007/s10653-019-00463-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Human zinc (Zn) deficiency is prevalent in areas where cereals dominate in the diet. Soil Zn application may enhance the concentration of Zn in wheat grains and dietary Zn intake by target populations. However, its value has never been practically quantified in Zn nutrition of any population group. We, therefore, studied farming families in rural Punjab (Pakistan). The selected adults (n = 156, grouped based on age and gender) were Zn undernourished (as assessed by estimated Zn bioavailability in their diet) and their plasma Zn levels also indicated Zn deficiency. On average, wheat consumption by the adults contributed about 68% in total Zn and 93% in total phytate intakes. Soil Zn application to wheat fields significantly increased Zn and decreased phytate concentration in chapati (flatbread made of whole-wheat flour). From dietary phytate intakes by the adults, we calculated desired chapati Zn concentration and dietary Zn intake that would meet their daily Zn requirement. The physiological Zn requirements of adult women and men were estimated to be achieved by intake of, respectively, 10.4-15.3 mg Zn d-1 (37-46 mg Zn kg-1 in chapati) and 14.4-23.3 mg Zn d-1 (41-52 mg Zn kg-1 in chapati). It was evident that soil Zn application aiming at optimum grain yield of wheat significantly improved Zn nutrition of the studied adults, but not up to desired levels. High Zn applications (via soil and/or foliage) to wheat and growing cultivars specifically selected for Zn biofortification may be needed to optimise Zn nutrition in rural Pakistan.
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Affiliation(s)
- Muhammad Ahsin
- Institute of Food Science and Nutrition, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, 60800, Pakistan
- National Institute of Food Science and Technology, Faculty of Food, Nutrition and Home Sciences, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Shahid Hussain
- Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, 60800, Pakistan.
| | - Zed Rengel
- UWA, School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia
| | - Mamoona Amir
- Institute of Food Science and Nutrition, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, 60800, Pakistan
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27
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Reis BZ, Vieira DADS, Maynard DDC, Silva DGD, Mendes-Netto RS, Cozzolino SMF. Zinc nutritional status influences ZnT1 and ZIP4 gene expression in children with a high risk of zinc deficiency. J Trace Elem Med Biol 2020; 61:126537. [PMID: 32388102 DOI: 10.1016/j.jtemb.2020.126537] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/10/2020] [Accepted: 04/17/2020] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Subclinical deficiency of zinc is associated with impairment of immune system function, growth, and cognitive development in children. Although plasma zinc is the best available biomarker of the risk of zinc deficiency in populations, its sensitivity for early detection of deficiency is limited. Therefore, we aimed to investigate zinc deficiency among preschool children and its relationship with whole blood gene expression of zinc transporters ZIP4 and ZnT1. MATERIAL AND METHODS This cross-sectional study included 139 children aged 32-76 months enrolled in philanthropic day-care centers. We performed an anthropometric evaluation, weighed food record and dietary record for dietary assessment, blood sample collection for zinc, and whole blood gene expression analyses of ZnT1 (SLC30A1) and ZIP4 (SLC39A4). RESULTS Zinc deficiency was observed in 26.6 % of the children despite adequate zinc intake and a phytate:zinc molar ratio < 18. Usual zinc intake did not affect whole blood gene expression of zinc transporters, but zinc status influenced ZnT1 and ZIP4 whole blood mRNA. Children with zinc deficiency exhibited 37.1 % higher ZnT1 expression and 45.3 % lower ZIP4 expression than children with adequate zinc (p < 0.05). CONCLUSION Children with plasma zinc deficiency exhibited higher expression of ZnT1 and lower expression of ZIP4 in whole blood mRNA, reinforcing the existence of strong regulation of mineral homeostasis according to the nutritional status, indicating that this analysis may be useful in the evaluation of dietary interventions.
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Affiliation(s)
- Bruna Zavarize Reis
- Postgraduate Program in Applied Human Nutrition (PRONUT), Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Science, University of São Paulo, Av. Prof. Lineu Prestes 580, Bloco 14, Butantã, 05508-000, São Paulo, SP, Brazil.
| | - Diva Aliete Dos Santos Vieira
- Department of Nutrition, Federal University of Sergipe, Av. Universitária Marcelo Deda Chagas, 13. Jardim Campo Novo, 49400-000. Lagarto, SE, Brazil.
| | - Dayanne da Costa Maynard
- Department of Nutrition, Federal University of Sergipe, Av. Marechal Rondon s/n. Jardim Rosa Elze, 49100-000, São Cristóvão, SE, Brazil.
| | - Danielle Góes da Silva
- Department of Nutrition, Federal University of Sergipe, Av. Marechal Rondon s/n. Jardim Rosa Elze, 49100-000, São Cristóvão, SE, Brazil.
| | - Raquel Simões Mendes-Netto
- Department of Nutrition, Federal University of Sergipe, Av. Marechal Rondon s/n. Jardim Rosa Elze, 49100-000, São Cristóvão, SE, Brazil.
| | - Silvia Maria Franciscato Cozzolino
- Postgraduate Program in Applied Human Nutrition (PRONUT), Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Science, University of São Paulo, Av. Prof. Lineu Prestes 580, Bloco 14, Butantã, 05508-000, São Paulo, SP, Brazil.
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28
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McDonald CM, Suchdev PS, Krebs NF, Hess SY, Wessells KR, Ismaily S, Rahman S, Wieringa FT, Williams AM, Brown KH, King JC. Adjusting plasma or serum zinc concentrations for inflammation: Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project. Am J Clin Nutr 2020; 111:927-937. [PMID: 32266402 PMCID: PMC7138668 DOI: 10.1093/ajcn/nqz304] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 11/14/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The accurate estimation of zinc deficiency at the population level is important, as it guides the design, targeting, and evaluation of nutrition interventions. Plasma or serum zinc concentration (PZC) is recommended to estimate zinc nutritional status; however, concentrations may decrease in the presence of inflammation. OBJECTIVES We aimed to assess the relation between PZC and inflammation in preschool children (PSC; 6-59 mo) and nonpregnant women of reproductive age (WRA; 15-49 y), and to compare different inflammation adjustment approaches, if adjustment is warranted. METHODS Cross-sectional data from 13 nationally representative surveys (18,859 PSC, 22,695 WRA) from the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project were analyzed. Correlation and decile analyses were conducted, and the following 3 adjustment methods were compared if a consistent negative association between PZC and C-reactive protein (CRP) or α-1-acid glycoprotein (AGP) was observed: 1) exclude individuals with CRP > 5 mg/L or AGP > 1 g/L; 2) apply arithmetic correction factors; and 3) use the BRINDA regression correction (RC) approach. RESULTS In 6 of 12 PSC surveys, the estimated prevalence of zinc deficiency increased with increasing CRP deciles, and to a lesser extent, with increasing AGP deciles. In WRA, the association of PZC with CRP and AGP was weak and inconsistent. In the 6 PSC surveys in which adjustment methods were compared, application of RC reduced the estimated prevalence of zinc deficiency by a median of 11 (range: 4-18) percentage points, compared with the unadjusted prevalence. CONCLUSIONS Relations between PZC and inflammatory markers were inconsistent, suggesting that correlation and decile analyses should be conducted before applying any inflammation adjustments. In populations of PSC that exhibit a significant negative association between PZC and CRP or AGP, application of the RC approach is supported. At this time, there is insufficient evidence to warrant inflammation adjustment in WRA.
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Affiliation(s)
- Christine M McDonald
- Children's Hospital Oakland Research Institute, Oakland, CA, USA
- Department of Pediatrics, School of Medicine, University of California, San Francisco, CA, USA
- Address correspondence to CMM (e-mail: )
| | - Parminder S Suchdev
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
- Nutrition Branch, CDC, Atlanta, GA, USA
| | - Nancy F Krebs
- Section of Nutrition, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sonja Y Hess
- Department of Nutrition, University of California, Davis, CA, USA
| | - K Ryan Wessells
- Department of Nutrition, University of California, Davis, CA, USA
| | - Sanober Ismaily
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Sabuktagin Rahman
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
- School of Medicine, Griffith University, Gold Coast, Queensland, Australia
| | | | - Anne M Williams
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
- Nutrition Branch, CDC, Atlanta, GA, USA
- McKing Consulting Corporation, Atlanta, GA, USA
| | - Kenneth H Brown
- Department of Nutrition, University of California, Davis, CA, USA
| | - Janet C King
- Children's Hospital Oakland Research Institute, Oakland, CA, USA
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Edlow AG, Guedj F, Sverdlov D, Pennings JLA, Bianchi DW. Significant Effects of Maternal Diet During Pregnancy on the Murine Fetal Brain Transcriptome and Offspring Behavior. Front Neurosci 2019; 13:1335. [PMID: 31920502 PMCID: PMC6928003 DOI: 10.3389/fnins.2019.01335] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 11/27/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Maternal over- and undernutrition in pregnancy plays a critical role in fetal brain development and function. The effects of different maternal diet compositions on intrauterine programing of the fetal brain is a lesser-explored area. The goal of this study was to investigate the impact of two chowmaternal diets on fetal brain gene expression signatures, fetal/neonatal growth, and neonatal and adult behavior in a mouse model. METHODS Throughout pregnancy and lactation, female C57Bl/6J mice were fed one of two standard, commercially available chow diets (pellet versus powder). The powdered chow diet was relatively deficient in micronutrients and enriched for carbohydrates and n-3 long-chain polyunsaturated fatty acids compared to the pelleted chow. RNA was extracted from embryonic day 15.5 forebrains and hybridized to whole genome expression microarrays (N = 5/maternal diet group). Functional analyses of significantly differentially expressed fetal brain genes were performed using Ingenuity Pathways Analysis and Gene Set Enrichment Analysis. Neonatal behavior was assessed using a validated scale (N = 62 pellet-exposed and 31 powder-exposed). Hippocampal learning, locomotor behavior, and motor coordination were assessed in a subset of adults using fear conditioning, open field testing, and Rotarod tests (N = 16 pellet-exposed, 14 powder-exposed). RESULTS Comparing powdered to pelleted chow diets, neither maternal weight trajectory in pregnancy nor embryo size differed. Maternal powdered chow diet was associated with 1647 differentially expressed fetal brain genes. Functional analyses identified significant upregulation of canonical pathways and upstream regulators involved in cell cycle regulation, synaptic plasticity, and sensory nervous system development in the fetal brain, and significant downregulation of pathways related to cell and embryo death. Pathways related to DNA damage response, brain immune response, amino acid and fatty acid transport, and dopaminergic signaling were significantly dysregulated. Powdered chow-exposed neonates were significantly longer but not heavier than pelleted chow-exposed counterparts. On neonatal behavioral testing, powdered chow-exposed neonates achieved coordination- and strength-related milestones significantly earlier, but sensory maturation reflexes significantly later. On adult behavioral testing, powdered chow-exposed offspring exhibited hyperactivity and hippocampal learning deficits. CONCLUSION In wild-type offspring, two diets that differed primarily with respect to micronutrient composition had significant effects on the fetal brain transcriptome, neonatal and adult behavior. These effects did not appear to be mediated by alterations in gross maternal nutritional status nor fetal/neonatal weight. Maternal dietary content is an important variable to consider for investigators evaluating fetal brain development and offspring behavior.
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Affiliation(s)
- Andrea G. Edlow
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Faycal Guedj
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Deanna Sverdlov
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, United States
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, MA, United States
| | | | - Diana W. Bianchi
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, United States
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30
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Priliani L, Prado EL, Restuadi R, Waturangi DE, Shankar AH, Malik SG. Maternal Multiple Micronutrient Supplementation Stabilizes Mitochondrial DNA Copy Number in Pregnant Women in Lombok, Indonesia. J Nutr 2019; 149:1309-1316. [PMID: 31177276 PMCID: PMC6686057 DOI: 10.1093/jn/nxz064] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/11/2019] [Accepted: 03/15/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The Supplementation with Multiple Micronutrients Intervention Trial (SUMMIT) in Lombok, Indonesia showed that maternal multiple micronutrients (MMN), as compared with iron and folic acid (IFA), reduced fetal loss, early infant mortality, and low birth weight. Mitochondria play a key role during pregnancy by providing maternal metabolic energy for fetal development, but the effects of maternal supplementation during pregnancy on mitochondria are not fully understood. OBJECTIVE The aim of this study was to assess the impact of MMN supplementation on maternal mitochondrial DNA copy number (mtDNA-CN). METHODS We used archived venous blood specimens from pregnant women enrolled in the SUMMIT study. SUMMIT was a cluster-randomized double-blind controlled trial in which midwives were randomly assigned to distribute MMN or IFA to pregnant women. In this study, we selected 108 sets of paired baseline and postsupplementation samples (MMN = 54 and IFA = 54). Maternal mtDNA-CN was determined by real-time quantitative polymerase chain reaction in baseline and postsupplementation specimens. The association between supplementation type and change in mtDNA-CN was performed using rank-based estimation for linear models. RESULTS In both groups, maternal mtDNA-CN at postsupplementation was significantly elevated compared with baseline (P < 0.001). The regression revealed that the MMN group had lower postsupplementation mtDNA-CN than the IFA group (β = -4.63, P = 0.003), especially for women with mtDNA-CN levels above the median at baseline (β = -7.49, P = 0.007). This effect was rapid, and observed within 33 d of initiation of supplementation (β = -7.39, P = 0.017). CONCLUSION Maternal MMN supplementation rapidly stabilized mtDNA-CN in pregnant women who participated in SUMMIT, indicating improved mitochondrial efficiency. The data provide a mechanistic basis for the beneficial effects of MMN on fetal growth and survival, and support the transition from routine IFA to MMN supplementation.This trial was registered at www.isrctn.com as ISRCTN34151616.
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Affiliation(s)
- Lidwina Priliani
- Eijkman Institute for Molecular Biology, Ministry of Research, Technology and Higher Education and,Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
| | - Elizabeth L Prado
- Summit Institute of Development, Mataram, West Nusa Tenggara, Indonesia,Department of Nutrition, University of California at Davis, Davis, CA
| | - Restuadi Restuadi
- Eijkman Institute for Molecular Biology, Ministry of Research, Technology and Higher Education and,Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Diana E Waturangi
- Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
| | - Anuraj H Shankar
- Summit Institute of Development, Mataram, West Nusa Tenggara, Indonesia,Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA,Address correspondence to AHS (e-mail: )
| | - Safarina G Malik
- Eijkman Institute for Molecular Biology, Ministry of Research, Technology and Higher Education and,Address correspondence to SGM (e-mail: )
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Kuang A, Erlund I, Herder C, Westerhuis JA, Tuomilehto J, Cornelis MC. Targeted proteomic response to coffee consumption. Eur J Nutr 2019; 59:1529-1539. [PMID: 31154491 DOI: 10.1007/s00394-019-02009-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/23/2019] [Indexed: 12/22/2022]
Abstract
PURPOSE Coffee is widely consumed and implicated in numerous health outcomes but the mechanisms by which coffee contributes to health is unclear. The purpose of this study was to test the effect of coffee drinking on candidate proteins involved in cardiovascular, immuno-oncological and neurological pathways. METHODS We examined fasting serum samples collected from a previously reported single blinded, three-stage clinical trial. Forty-seven habitual coffee consumers refrained from drinking coffee for 1 month, consumed 4 cups of coffee/day in the second month and 8 cups/day in the third month. Samples collected after each coffee stage were analyzed using three multiplex proximity extension assays that, after quality control, measured a total of 247 proteins implicated in cardiovascular, immuno-oncological and neurological pathways and of which 59 were previously linked to coffee exposure. Repeated measures ANOVA was used to test the relationship between coffee treatment and each protein. RESULTS Two neurology-related proteins including carboxypeptidase M (CPM) and neutral ceramidase (N-CDase or ASAH2), significantly increased after coffee intake (P < 0.05 and Q < 0.05). An additional 46 proteins were nominally associated with coffee intake (P < 0.05 and Q > 0.05); 9, 8 and 29 of these proteins related to cardiovascular, immuno-oncological and neurological pathways, respectively, and the levels of 41 increased with coffee intake. CONCLUSIONS CPM and N-CDase levels increased in response to coffee intake. These proteins have not previously been linked to coffee and are thus novel markers of coffee response worthy of further study. CLINICAL TRIAL REGISTRY: http://www.isrctn.com/ISRCTN12547806.
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Affiliation(s)
- Alan Kuang
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, 680 North Lake Shore Drive, Suite 1400, Chicago, IL, 60611, USA
| | - Iris Erlund
- Genomics and Biomarkers Unit, National Institute for Health and Welfare, P.O. Box 30, 00271, Helsinki, Finland
| | - Christian Herder
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
- German Center for Diabetes Research (DZD), Partner Düsseldorf, Düsseldorf, Germany
- Division of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Johan A Westerhuis
- Biosystems Data Analysis, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
- Centre for Human Metabolomics, Faculty of Natural Sciences, North-West University (Potchefstroom Campus), Private Bag X6001, Potchefstroom, South Africa
| | - Jaakko Tuomilehto
- Disease Risk Unit, National Institute for Health and Welfare, 00271, Helsinki, Finland
- Department of Public Health, University of Helsinki, 00014, Helsinki, Finland
- Saudi Diabetes Research Group, King Abdulaziz University, Jidda, 21589, Saudi Arabia
| | - Marilyn C Cornelis
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, 680 North Lake Shore Drive, Suite 1400, Chicago, IL, 60611, USA.
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Ohly H, Broadley MR, Joy EJM, Khan MJ, McArdle H, Zaman M, Zia M, Lowe N. The BiZiFED project: Biofortified zinc flour to eliminate deficiency in Pakistan. NUTR BULL 2019; 44:60-64. [PMID: 31217749 PMCID: PMC6559288 DOI: 10.1111/nbu.12362] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Zinc deficiency is a global public health problem, affecting ~17% of the world's population, with the greatest burden in low- and middle-income countries. An increasing body of evidence suggests that biofortification may be a cost-effective and sustainable approach to reducing zinc and other micronutrient deficiencies. Biofortification enhances the nutritional quality of food crops through conventional plant breeding techniques and agronomic practices. This paper presents ongoing research on biofortification in Pakistan, where over 40% of women are zinc deficient. The Biofortified Zinc Flour to Eliminate Deficiency (BiZiFED) project aims to investigate the impact of biofortification as a strategy to alleviate zinc deficiency in Pakistan. The project is supported by the Biotechnology and Biological Sciences Research Council (BBSRC) Global Challenges Research Fund from May 2017 to April 2019. This paper outlines the four objectives and work packages within the BiZiFED project: (1) a double-blind, randomised controlled trial to examine the effect of consuming flour made from a high zinc variety of biofortified wheat (Zincol-2016/NR-421) on dietary zinc intake and status; (2) a cost-effectiveness study to assess the health and economic impact of agronomic biofortification of wheat; (3) a mixed methods study to explore the cultural acceptability and sustainability of biofortification in Pakistan; (4) capacity building and development of long-term research partnerships in Pakistan. The findings will contribute to the evidence base for the potential impact of biofortification to alleviate zinc deficiency among the poorest communities.
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Affiliation(s)
- H. Ohly
- University of Central LancashirePrestonUK
| | | | - E. J. M. Joy
- London School of Hygiene & Tropical MedicineLondonUK
| | - M. J. Khan
- Khyber Medical UniversityPeshawarPakistan
| | | | - M. Zaman
- Khyber Medical College and Teaching HospitalPeshawarPakistan
| | - M. Zia
- Fauji Fertilizer Company LimitedRawalpindiPakistan
| | - N. Lowe
- University of Central LancashirePrestonUK
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Gutiérrez-González E, Castelló A, Fernández-Navarro P, Castaño-Vinyals G, Llorca J, Salas D, Salcedo-Bellido I, Aragonés N, Fernández-Tardón G, Alguacil J, Gracia-Lavedan E, García-Esquinas E, Gómez-Acebo I, Amiano P, Romaguera D, Kogevinas M, Pollán M, Pérez-Gómez B. Dietary Zinc and Risk of Prostate Cancer in Spain: MCC-Spain Study. Nutrients 2018; 11:nu11010018. [PMID: 30577563 PMCID: PMC6356690 DOI: 10.3390/nu11010018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/11/2018] [Accepted: 12/18/2018] [Indexed: 02/05/2023] Open
Abstract
Zinc is a key trace element in normal prostate cell metabolism, and is decreased in neoplastic cells. However, the association between dietary zinc and prostate cancer (PC) in epidemiologic studies is a conflicting one. Our aim was to explore this association in an MCC-Spain case-control study, considering tumor aggressiveness and extension, as well as genetic susceptibility to PC. 733 incident cases and 1228 population-based controls were included for this study. Dietary zinc was assessed using a food frequency questionnaire, and genetic susceptibility was assessed with a single nucleotide polymorphisms (SNP)-based polygenic risk score (PRS). The association between zinc intake and PC was evaluated with mixed logistic and multinomial regression models. They showed an increased risk of PC in those with higher intake of zinc (Odds Ratio (OR) tertile 3vs1: 1.39; 95% Confidence interval (CI):1.00–1.95). This association was mainly observed in low grade PC (Gleason = 6 RRR tertile 3vs1: 1.76; 95% CI:1.18–2.63) as well as in localized tumors (cT1-cT2a RRR tertile 3vs1: 1.40; 95% CI:1.00–1.95) and among those with higher PRS (OR tertile 3vs1: 1.50; 95% CI:0.89–2.53). In conclusion, a higher dietary zinc intake could increase the risk of low grade and localized tumors. Men with higher genetic susceptibility might also have a higher risk of PC associated with this nutrient intake.
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Affiliation(s)
- Enrique Gutiérrez-González
- Public Health & Preventive Medicine Teaching Unit. National School of Public Health. Carlos III Institute of Health, 28029 Madrid, Spain.
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
| | - Adela Castelló
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Department of Epidemiology of Chronic Diseases. National Centre for Epidemiology. Carlos III Institute of Health, 28029 Madrid, Spain.
- Faculty of Medicine, University of Alcalá, 28871 Alcalá de Henares, Spain.
| | - Pablo Fernández-Navarro
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Department of Epidemiology of Chronic Diseases. National Centre for Epidemiology. Carlos III Institute of Health, 28029 Madrid, Spain.
| | - Gemma Castaño-Vinyals
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- ISGlobal, 08036 Barcelona, Spain.
- IMIM (Hospital del Mar Medical Research Institute), 08003 Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), 08002 Barcelona, Spain.
| | - Javier Llorca
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Universidad de Cantabria-IDIVAL, 39011 Santander, Spain.
| | - Dolores Salas
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Área de Cáncer y Salud Pública, FISABIO-Salud Pública, 46020 Valencia, Spain.
| | - Inmaculada Salcedo-Bellido
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Universidad de Granada-ibs.Granada, 18012 Granada, Spain.
| | - Nuria Aragonés
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Cancer epidemiology Section, Public Health Division, Department of Health of Madrid, 28035 Madrid, Spain.
| | - Guillermo Fernández-Tardón
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Oncology Institute IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Universidad de Oviedo, 33003 Asturias, Spain.
| | - Juan Alguacil
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Centro de Investigación en Recursos Naturales, Salud y Medio Ambiente (RENSMA), Universidad de Huelva, 21004 Huelva, Spain.
| | - Esther Gracia-Lavedan
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- ISGlobal, 08036 Barcelona, Spain.
- IMIM (Hospital del Mar Medical Research Institute), 08003 Barcelona, Spain.
| | - Esther García-Esquinas
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Department of Preventive Medicine and Public Health, Universidad Autónoma de Madrid and Idipaz, 28029 Madrid, Spain.
| | - Inés Gómez-Acebo
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Universidad de Cantabria-IDIVAL, 39011 Santander, Spain.
| | - Pilar Amiano
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Public Health Division of Gipuzkoa, BioDonostia Research Health Institute, 20014 San Sebastian, Spain.
| | - Dora Romaguera
- ISGlobal, 08036 Barcelona, Spain.
- Balearic Islands Health Research Institute (IdISBa), University Hospital Son Espases, 07120 Palma de Mallorca, Spain.
- CIBER Fisiopathology of Obesity and Nutrition (CIBER-OBN), Carlos III Institute of Health, 28029 Madrid, Spain.
| | - Manolis Kogevinas
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- ISGlobal, 08036 Barcelona, Spain.
- IMIM (Hospital del Mar Medical Research Institute), 08003 Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), 08002 Barcelona, Spain.
| | - Marina Pollán
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Department of Epidemiology of Chronic Diseases. National Centre for Epidemiology. Carlos III Institute of Health, 28029 Madrid, Spain.
| | - Beatriz Pérez-Gómez
- Public Health & Preventive Medicine Teaching Unit. National School of Public Health. Carlos III Institute of Health, 28029 Madrid, Spain.
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), 28029 Madrid, Spain.
- Department of Epidemiology of Chronic Diseases. National Centre for Epidemiology. Carlos III Institute of Health, 28029 Madrid, Spain.
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Pao PJ, Emri E, Abdirahman SB, Soorma T, Zeng HH, Hauck SM, Thompson RB, Lengyel I. The effects of zinc supplementation on primary human retinal pigment epithelium. J Trace Elem Med Biol 2018. [PMID: 29523386 DOI: 10.1016/j.jtemb.2018.02.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Population-based and interventional studies have shown that elevated zinc levels can reduce the progression to advanced age-related macular degeneration. The objective of this study was to assess whether elevated extracellular zinc has a direct effect on retinal pigment epithelial cells (RPE), by examining the phenotype and molecular characteristics of increased extracellular zinc on human primary RPE cells. Monolayers of human foetal primary RPE cells were grown on culture inserts and maintained in medium supplemented with increasing total concentrations of zinc (0, 75, 100, 125 and 150 μM) for up to 4 weeks. Changes in cell viability and differentiation as well as expression and secretion of proteins were investigated. RPE cells developed a confluent monolayer with cobblestone morphology and transepithelial resistance (TER) >200 Ω*cm2 within 4 weeks. There was a zinc concentration-dependent increase in TER and pigmentation, with the largest effects being achieved by the addition of 125 μM zinc to the culture medium, corresponding to 3.4 nM available (free) zinc levels. The cells responded to addition of zinc by significantly increasing the expression of Retinoid Isomerohydrolase (RPE65) gene; cell pigmentation; Premelanosome Protein (PMEL17) immunoreactivity; and secretion of proteins including Apolipoprotein E (APOE), Complement Factor H (CFH), and High-Temperature Requirement A Serine Peptidase 1 (HTRA1) without an effect on cell viability. This study shows that elevated extracellular zinc levels have a significant and direct effect on differentiation and function of the RPE cells in culture, which may explain, at least in part, the positive effects seen in clinical settings. The results also highlight that determining and controlling of available, as opposed to total added, zinc will be essential to be able to compare results obtained in different laboratories.
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Affiliation(s)
- Po-Jung Pao
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, 11-43 Bath St, London EC1 V9EL, United Kingdom; Department of Structural and Molecular Biology, University College London, Gower Street, London, WC1E 6BT, United Kingdom.
| | - Eszter Emri
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, 11-43 Bath St, London EC1 V9EL, United Kingdom; Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, United Kingdom.
| | - Safiya Bishar Abdirahman
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, 11-43 Bath St, London EC1 V9EL, United Kingdom.
| | - Talha Soorma
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, 11-43 Bath St, London EC1 V9EL, United Kingdom.
| | - Hui-Hui Zeng
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, United States.
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Zentrum München, German Research Center for Environmental Health(GmbH), Ingolstädter Landstraße 1, 85764 Oberschleißheim, Germany.
| | - Richard B Thompson
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, United States.
| | - Imre Lengyel
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, 11-43 Bath St, London EC1 V9EL, United Kingdom; Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, United Kingdom.
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Hennigar SR, Lieberman HR, Fulgoni VL, McClung JP. Serum Zinc Concentrations in the US Population Are Related to Sex, Age, and Time of Blood Draw but Not Dietary or Supplemental Zinc. J Nutr 2018; 148:1341-1351. [PMID: 29947812 DOI: 10.1093/jn/nxy105] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/12/2018] [Indexed: 12/31/2022] Open
Abstract
Background Serum zinc concentration is used to assess the zinc status of populations. Cutoffs for serum zinc were developed on the basis of data from the second NHANES (1976-1980). Objective The objective of this study was to evaluate serum zinc concentrations in the US population and to determine factors affecting serum zinc with the use of NHANES 2011-2014. Methods Serum zinc was determined in males and females aged ≥6 y with the use of NHANES 2011-2014 (n = 4347). Dietary zinc intake was determined, and factors affecting serum zinc were identified with the use of regression models adjusting for sex, age, fasting status, and time of blood draw. ORs were calculated to identify factors associated with the risk of being below the serum zinc cutoff, and the prevalence of low serum zinc in the US was calculated. P < 0.01 was considered significant. Results Mean ± SE serum zinc concentrations in males and females were 84.9 ± 0.8 and 80.6 ± 0.6 μg/dL, respectively (P < 0.0001). Regression models with serum zinc as the dependent variable indicated that afternoon and evening blood draws (β = -9.7 and -15.3; P < 0.0001) were negatively associated with serum zinc concentrations and serum albumin (β = 16.1; P < 0.0001) and hemoglobin (β = 1.0; P = 0.0048) were positively associated with serum zinc concentrations. Hypoalbuminemia (OR = 11.2; 99% CI: 3.4, 37.3), anemia in females (OR: 3.4; 99% CI: 1.7, 6.9), and pregnancy (OR: 9.6; 99% CI: 2.9, 31.9) increased the odds of being below the serum zinc cutoff (P < 0.0001 for all). Zinc from diet or supplements did not affect serum zinc (P > 0.01). Approximately 3.8% of children (<10 y), 8.6% of males (≥10 y), and 8.2% of females (≥10 y) were below the serum zinc cutoff. Conclusions Factors such as sex, age, and time of blood draw should be considered when using serum zinc concentration to determine the zinc status of a population. Caution is advised when interpreting serum zinc concentration in populations with a high prevalence of hypoalbuminemia or anemia. This trial was registered at http://www.isrctn.com as ISRCTN96013840.
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Affiliation(s)
- Stephen R Hennigar
- US Army Research Institute of Environmental Medicine, Military Nutrition Division, Natick, MA.,Oak Ridge Institute for Science and Education, Belcamp, MD
| | - Harris R Lieberman
- US Army Research Institute of Environmental Medicine, Military Nutrition Division, Natick, MA
| | | | - James P McClung
- US Army Research Institute of Environmental Medicine, Military Nutrition Division, Natick, MA
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Stookey JD, Hamer J, Killilea DW. Change in hydration indices associated with an increase in total water intake of more than 0.5 L/day, sustained over 4 weeks, in healthy young men with initial total water intake below 2 L/day. Physiol Rep 2018; 5:5/22/e13356. [PMID: 29150589 PMCID: PMC5704074 DOI: 10.14814/phy2.13356] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/09/2017] [Accepted: 06/23/2017] [Indexed: 01/11/2023] Open
Abstract
This secondary data analysis addressed gaps in knowledge about effects of chronic water intake. Longitudinal data from the Adapt Study were used to describe effects of prescribing a sustained increase in water intake relative to baseline, for 4 weeks, on multiple indices of total body water (TBW) flux, regulation, distribution, and volume in five healthy, free-living, young men, with mean total water intake initially below 2 L/day. Indices were measured weekly. Within-person fixed effect models tested for significant changes in indices over time and associations between changes in indices. Agreement between indices was described. Mixed models tested if baseline between-person differences in hydration indices modified changes in indices over time. Body water flux: The half-life of water in the body decreased significantly. Body water regulation: Serum osmolality decreased significantly. Urine anti-diuretic hormone, sodium, potassium, and osmolality decreased significantly. Plasma aldosterone and serum sodium increased significantly. Body water distribution: No significant changes were observed. Body water volume: Saliva osmolality decreased significantly. Body weight increased significantly by a mean ± SEM of 1.8% ± 0.5% from baseline over 4 weeks. Changes in indices were significantly inter-correlated. Agreement between indices changed over 4 weeks. Baseline saliva osmolality significantly modified responses to chronic water intake. The results motivate hypotheses for future studies: Chronic TBW deficit occurs in healthy individuals under daily life conditions and increases chronic disease risk; Sustained higher water intake restores TBW through gradual isotonic retention of potassium and/or sodium; Saliva osmolality is a sensitive and specific index of chronic hydration status.
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Affiliation(s)
- Jodi D Stookey
- Children's Hospital Oakland Research Institute, Oakland, California
| | - Janice Hamer
- Children's Hospital Oakland Research Institute, Oakland, California
| | - David W Killilea
- Children's Hospital Oakland Research Institute, Oakland, California
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Lowe NM, Khan MJ, Broadley MR, Zia MH, McArdle HJ, Joy EJM, Ohly H, Shahzad B, Ullah U, Kabana G, Medhi R, Afridi MZ. Examining the effectiveness of consuming flour made from agronomically biofortified wheat (Zincol-2016/NR-421) for improving Zn status in women in a low-resource setting in Pakistan: study protocol for a randomised, double-blind, controlled cross-over trial (BiZiFED). BMJ Open 2018; 8:e021364. [PMID: 29666141 PMCID: PMC5905768 DOI: 10.1136/bmjopen-2017-021364] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 02/16/2018] [Accepted: 03/05/2018] [Indexed: 01/22/2023] Open
Abstract
INTRODUCTION Dietary zinc (Zn) deficiency is a global problem, particularly in low-income and middle-income countries where access to rich, animal-source foods of Zn is limited due to poverty. In Pakistan, Zn deficiency affects over 40% of the adult female population, resulting in suboptimal immune status and increased likelihood of complications during pregnancy. METHODS AND ANALYSIS We are conducting a double-blind, randomised controlled feeding study with cross-over design in a low-resource setting in Pakistan. Households were provided with flour milled from genetically and agronomically biofortified grain (Zincol-2016/NR-421) or control grain (Galaxy-2013). Fifty households were recruited. Each household included a woman aged 16-49 years who is neither pregnant nor breastfeeding, and not currently consuming nutritional supplements. These women were the primary study participants. All households were provided with control flour for an initial 2-week baseline period, followed by an 8-week intervention period where 25 households receive biofortified flour (group A) and 25 households receive control flour (group B). After this 8-week period, groups A and B crossed over, receiving control and biofortified flour respectively for 8 weeks. Tissue (blood, hair and nails) have been collected from the women at five time points: baseline, middle and end of period 1, and middle and end of period 2. ETHICS AND DISSEMINATION Ethical approval was granted from the lead university (reference no. STEMH 697 FR) and the collaborating institution in Pakistan. The final study methods (including any modifications) will be published in peer-reviewed journals, alongside the study outcomes on completion of the data analysis. In addition, findings will be disseminated to the scientific community via conference presentations and abstracts and communicated to the study participants through the village elders at an appropriate community forum. REGISTRATION DETAILS The trial has been registered with the ISRCTN registry, study ID ISRCTN83678069.
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Affiliation(s)
- Nicola M Lowe
- International Institute of Nutritional Sciences and Applied Food Safety Studies, Faculty of Health and Wellbeing, University of Central Lancashire, Preston, UK
| | - Muhammad Jaffar Khan
- Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Martin R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonnington Campus, Leicestershire, UK
| | - Munir H Zia
- Research and Development Department, Fauji Fertilizer Company Limited, Rawalpindi, Punjab, Pakistan
| | - Harry J McArdle
- School of Biosciences, University of Nottingham, Sutton Bonnington Campus, Leicestershire, UK
| | - Edward J M Joy
- Department of Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Heather Ohly
- International Institute of Nutritional Sciences and Applied Food Safety Studies, Faculty of Health and Wellbeing, University of Central Lancashire, Preston, UK
| | - Babar Shahzad
- Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Ubaid Ullah
- Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
| | | | | | - Mukhtiar Zaman Afridi
- Division of Medicine, Medical Teaching Institution, Lady Reading Hospital, Peshawar, Pakistan
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39
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Sandstead HH, Prasad AS. Dietary whole grains and zinc nutriture. Am J Clin Nutr 2017; 106:955-956. [PMID: 28864586 PMCID: PMC5573029 DOI: 10.3945/ajcn.117.161224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Harold H Sandstead
- From the Division of Nutrition, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, Galveston, TX (HHS, e-mail: ); and the Department of Oncology, Wayne State University School of Medicine, Detroit, MI (ASP)
| | - Ananda S Prasad
- From the Division of Nutrition, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, Galveston, TX (HHS, e-mail: ); and the Department of Oncology, Wayne State University School of Medicine, Detroit, MI (ASP)
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40
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Engle-Stone R, Williams TN, Nankap M, Ndjebayi A, Gimou MM, Oyono Y, Tarini A, Brown KH, Green R. Prevalence of Inherited Hemoglobin Disorders and Relationships with Anemia and Micronutrient Status among Children in Yaoundé and Douala, Cameroon. Nutrients 2017; 9:E693. [PMID: 28671630 PMCID: PMC5537808 DOI: 10.3390/nu9070693] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/19/2017] [Accepted: 06/26/2017] [Indexed: 02/06/2023] Open
Abstract
Information on the etiology of anemia is necessary to design effective anemia control programs. Our objective was to measure the prevalence of inherited hemoglobin disorders (IHD) in a representative sample of children in urban Cameroon, and examine the relationships between IHD and anemia. In a cluster survey of children 12-59 months of age (n = 291) in Yaoundé and Douala, we assessed hemoglobin (Hb), malaria infection, and plasma indicators of inflammation and micronutrient status. Hb S was detected by HPLC, and α⁺thalassemia (3.7 kb deletions) by PCR. Anemia (Hb < 110 g/L), inflammation, and malaria were present in 45%, 46%, and 8% of children. A total of 13.7% of children had HbAS, 1.6% had HbSS, and 30.6% and 3.1% had heterozygous and homozygous α⁺thalassemia. The prevalence of anemia was greater among HbAS compared to HbAA children (60.3 vs. 42.0%, p = 0.038), although mean Hb concentrations did not differ, p = 0.38). Hb and anemia prevalence did not differ among children with or without single gene deletion α⁺thalassemia. In multi-variable models, anemia was independently predicted by HbAS, HbSS, malaria, iron deficiency (ID; inflammation-adjusted ferritin <12 µg/L), higher C-reactive protein, lower plasma folate, and younger age. Elevated soluble transferrin receptor concentration (>8.3 mg/L) was associated with younger age, malaria, greater mean reticulocyte counts, inflammation, HbSS genotype, and ID. IHD are prevalent but contribute modestly to anemia among children in urban Cameroon.
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Affiliation(s)
- Reina Engle-Stone
- Department of Nutrition, University of California, Davis, CA 95616, USA; or
| | | | - Martin Nankap
- Helen Keller International, Cameroon, BP 14227 Yaoundé, Cameroon; (M.N.); (A.N.); (A.T.)
| | - Alex Ndjebayi
- Helen Keller International, Cameroon, BP 14227 Yaoundé, Cameroon; (M.N.); (A.N.); (A.T.)
| | | | - Yannick Oyono
- Centre Pasteur du Cameroun, BP 1274 Yaoundé, Cameroon;
| | - Ann Tarini
- Centre Pasteur du Cameroun, BP 1274 Yaoundé, Cameroon;
| | - Kenneth H. Brown
- Department of Nutrition, University of California, Davis, CA 95616, USA; or
- Bill & Melinda Gates Foundation, Seattle, WA 98102, USA
| | - Ralph Green
- Department of Medical Pathology and Laboratory Medicine, UC Davis Medical Center, Sacramento, CA 95817, USA;
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41
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Engle-Stone R, Nankap M, Ndjebayi AO, Allen LH, Shahab-Ferdows S, Hampel D, Killilea DW, Gimou MM, Houghton LA, Friedman A, Tarini A, Stamm RA, Brown KH. Iron, Zinc, Folate, and Vitamin B-12 Status Increased among Women and Children in Yaoundé and Douala, Cameroon, 1 Year after Introducing Fortified Wheat Flour. J Nutr 2017; 147:1426-1436. [PMID: 28592513 PMCID: PMC5483962 DOI: 10.3945/jn.116.245076] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 01/31/2017] [Accepted: 05/03/2017] [Indexed: 01/21/2023] Open
Abstract
Background: Few data are available on the effectiveness of large-scale food fortification programs.Objective: We assessed the impact of mandatory wheat flour fortification on micronutrient status in Yaoundé and Douala, Cameroon.Methods: We conducted representative surveys 2 y before and 1 y after the introduction of fortified wheat flour. In each survey, 10 households were selected within each of the same 30 clusters (n = ∼300 households). Indicators of inflammation, malaria, anemia, and micronutrient status [plasma ferritin, soluble transferrin receptor (sTfR), zinc, folate, and vitamin B-12] were assessed among women aged 15-49 y and children 12-59 mo of age.Results: Wheat flour was consumed in the past 7 d by ≥90% of participants. Postfortification, mean total iron and zinc concentrations of flour samples were 46.2 and 73.6 mg/kg (target added amounts were 60 and 95 mg/kg, respectively). Maternal anemia prevalence was significantly lower postfortification (46.7% compared with 39.1%; adjusted P = 0.01), but mean hemoglobin concentrations and child anemia prevalence did not differ. For both women and children postfortification, mean plasma concentrations were greater for ferritin and lower for sTfR after adjustments for potential confounders. Mean plasma zinc concentrations were greater postfortification and the prevalence of low plasma zinc concentration in women after fortification (21%) was lower than before fortification (39%, P < 0.001); likewise in children, the prevalence postfortification (28%) was lower than prefortification (47%, P < 0.001). Mean plasma total folate concentrations were ∼250% greater postfortification among women (47 compared with 15 nmol/L) and children (56 compared with 20 nmol/L), and the prevalence of low plasma folate values was <1% after fortification in both population subgroups. In a nonrepresentative subset of plasma samples, folic acid was detected in 77% of women (73% of those fasting) and 93% of children. Mean plasma and breast-milk vitamin B-12 concentrations were >50% greater postfortification.Conclusion: Although the pre-post survey design limits causal inference, iron, zinc, folate, and vitamin B-12 status increased among women and children in urban Cameroon after mandatory wheat flour fortification.
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Affiliation(s)
- Reina Engle-Stone
- Department of Nutrition, University of California, Davis, Davis, CA;
| | | | | | - Lindsay H Allen
- Department of Nutrition, University of California, Davis, Davis, CA
- USDA, Agricultural Research Service Western Human Nutrition Research Center, Davis, CA
| | - Setareh Shahab-Ferdows
- Department of Nutrition, University of California, Davis, Davis, CA
- USDA, Agricultural Research Service Western Human Nutrition Research Center, Davis, CA
| | - Daniela Hampel
- Department of Nutrition, University of California, Davis, Davis, CA
- USDA, Agricultural Research Service Western Human Nutrition Research Center, Davis, CA
| | - David W Killilea
- Nutrition and Metabolism Center, Children's Hospital Oakland Research Institute, Oakland, CA
| | | | | | | | - Ann Tarini
- Helen Keller International, New York, NY
| | | | - Kenneth H Brown
- Department of Nutrition, University of California, Davis, Davis, CA
- Bill & Melinda Gates Foundation, Seattle, WA
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42
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Killilea DW, Rohner F, Ghosh S, Otoo GE, Smith L, Siekmann JH, King JC. Identification of a Hemolysis Threshold That Increases Plasma and Serum Zinc Concentration. J Nutr 2017; 147:1218-1225. [PMID: 28490675 PMCID: PMC5443468 DOI: 10.3945/jn.116.247171] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 01/19/2017] [Accepted: 03/28/2017] [Indexed: 12/20/2022] Open
Abstract
Background: Plasma or serum zinc concentration (PZC or SZC) is the primary measure of zinc status, but accurate sampling requires controlling for hemolysis to prevent leakage of zinc from erythrocytes. It is not established how much hemolysis can occur without changing PZC/SZC concentrations.Objective: This study determines a guideline for the level of hemolysis that can significantly elevate PZC/SZC.Methods: The effect of hemolysis on PZC/SZC was estimated by using standard hematologic variables and mineral content. The calculated hemolysis threshold was then compared with results from an in vitro study and a population survey. Hemolysis was assessed by hemoglobin and iron concentrations, direct spectrophotometry, and visual assessment of the plasma or serum. Zinc and iron concentrations were determined by inductively coupled plasma spectrometry.Results: A 5% increase in PZC/SZC was calculated to result from the lysis of 1.15% of the erythrocytes in whole blood, corresponding to ∼1 g hemoglobin/L added into the plasma or serum. Similarly, the addition of simulated hemolysate to control plasma in vitro caused a 5% increase in PZC when hemoglobin concentrations reached 1.18 ± 0.10 g/L. In addition, serum samples from a population nutritional survey were scored for hemolysis and analyzed for changes in SZC; samples with hemolysis in the range of 1-2.5 g hemoglobin/L showed an estimated increase in SZC of 6% compared with nonhemolyzed samples. Each approach indicated that a 5% increase in PZC/SZC occurs at ∼1 g hemoglobin/L in plasma or serum. This concentration of hemoglobin can be readily identified directly by chemical hemoglobin assays or indirectly by direct spectrophotometry or matching to a color scale.Conclusions: A threshold of 1 g hemoglobin/L is recommended for PZC/SZC measurements to avoid increases in zinc caused by hemolysis. The use of this threshold may improve zinc assessment for monitoring zinc status and nutritional interventions.
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Affiliation(s)
| | | | - Shibani Ghosh
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA; and
| | - Gloria E Otoo
- Department of Nutrition and Food Sciences, University of Ghana, Accra, Ghana
| | - Lauren Smith
- Children's Hospital Oakland Research Institute, Oakland, CA
| | | | - Janet C King
- Children's Hospital Oakland Research Institute, Oakland, CA
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