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Yilmaz H, Özer G, Baloch FS, Çiftçi V, Chung YS, Sun HJ. Genome-Wide Identification and Expression Analysis of MTP (Metal Ion Transport Proteins) Genes in the Common Bean. PLANTS (BASEL, SWITZERLAND) 2023; 12:3218. [PMID: 37765382 PMCID: PMC10535811 DOI: 10.3390/plants12183218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023]
Abstract
MTP/CDF carriers, called metal ion transport proteins, act as substrates for the transmission of micronutrients such as iron (Fe), zinc (Zn), and manganese (Mn) to membrane carriers in plants. In this study, genome-wide analysis of the MTP gene family in the common bean genome, expression analysis of the PvMTP4, PvMTP5, and PvMTP12 genes after Fe and Zn treatments, and the effects of Fe and Zn applications on iron and zinc content were investigated. This study used common bean genotypes assumed to have high or low Fe and Zn accumulation ability. PvMTP genes were defined as containing conserved catalytic domains with molecular weights and protein lengths ranging from 41.35 to 91.05 kDa and from 369 to 813 amino acids (aa), respectively. As a result of the phylogenetic analysis, three main clusters containing seven subgroups were formed. In this study, the first characterization of the MTP gene family of beans was performed, and the responses of three different PvMTP genes in the Zn-CDF group to Fe and Zn applications were revealed. The obtained findings are thought to constitute pioneering resources for future research on common bean biofortification studies, plant breeding related to Fe and Zn, and the functional characterization of the MTP gene family.
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Affiliation(s)
- Hilal Yilmaz
- Plant and Animal Production Program, Izmit Vocational School, Kocaeli University, Kocaeli 41285, Türkiye;
- Department of Field Crops, Faculty of Agriculture, Bolu Abant Izzet Baysal University, Bolu 14030, Türkiye;
| | - Göksel Özer
- Department of Plant Protection, Faculty of Agriculture, Bolu Abant Izzet Baysal University, Bolu 14030, Türkiye;
| | - Faheem Shehzad Baloch
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas 58140, Türkiye
| | - Vahdettin Çiftçi
- Department of Field Crops, Faculty of Agriculture, Bolu Abant Izzet Baysal University, Bolu 14030, Türkiye;
| | - Yong Suk Chung
- Department of Plant Resources and Environment, Jeju National University, Jeju 63243, Republic of Korea;
| | - Hyeon-Jin Sun
- Subtropical Horticulture Research Institute, Jeju National University, Jeju 63243, Republic of Korea;
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2
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Orłowska A, Proch J, Niedzielski P. A Fast and Efficient Procedure of Iron Species Determination Based on HPLC with a Short Column and Detection in High Resolution ICP OES. Molecules 2023; 28:molecules28114539. [PMID: 37299015 DOI: 10.3390/molecules28114539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
The optimization and application of a new hyphenated procedure for iron ionic speciation, i.e., high performance liquid chromatography (HPLC) with short cation-exchange column (50 mm × 4 mm) coupled to high resolution inductively coupled plasma optical emission spectrometry (ICP hrOES), is presented in this paper. Fe(III) and Fe(II) species were separated on the column with the mobile phase containing pyridine-2,6-dicarboxylic acid (PDCA). The total time of the analysis was approx. 5 min, with a significantly low eluent flow rate (0.5 mL min-1) compared to the literature. Additionally, a long cation-exchange column (250 mm × 4.0 mm) was used as reference. Depending on the total iron content in the sample, two plasma views were chosen, e.g., an attenuated axial (<2 g kg-1) and an attenuated radial. The standard addition method was performed for the method's accuracy studies, and the applicability was presented on three types of samples: sediments, soils, and archaeological pottery. This study introduces a fast, efficient, and green method for leachable iron speciation in both geological and pottery samples.
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Affiliation(s)
- Aleksandra Orłowska
- Department of Analytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Jędrzej Proch
- Department of Analytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Faculty of Archaeology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 7, 61-614 Poznań, Poland
- Interdisciplinary Research Group Archaeometry, Faculty of Archaeology and Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 7-8, 61-614 Poznań, Poland
| | - Przemysław Niedzielski
- Department of Analytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Interdisciplinary Research Group Archaeometry, Faculty of Archaeology and Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 7-8, 61-614 Poznań, Poland
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Welk AK, Mehlhose C, Daum D, Enneking U. Vegetables with Enhanced Iron Bioavailability-German Consumers' Perceptions of a New Approach to Improve Dietary Iron Supply. Nutrients 2023; 15:nu15102291. [PMID: 37242174 DOI: 10.3390/nu15102291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/08/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Iron deficiency is still widespread as a major health problem even in countries with adequate food supply. It mainly affects women but also vegans, vegetarians, and athletes and can lead to various clinical pictures. Biofortification of vitamin C-rich vegetables with iron may be one new approach to face this nutritional challenge. However, so far, little is known about the consumer acceptance of iron-biofortified vegetables, particularly in developed countries. To address this issue, a quantitative survey of 1000 consumers in Germany was conducted. The results showed that depending on the type of vegetable, between 54% and 79% of the respondents were interested in iron-biofortified vegetables. Regression analysis showed a relationship between product acceptance, gender, and area of residence. In addition, relationships were found between consumer preferences for enjoyment, sustainability, and naturalness. Compared to functional food and dietary supplements, 77% of respondents would prefer fresh iron-rich vegetables to improve their iron intake. For a market launch, those iron-rich vegetables appear especially promising, which can additionally be advertised with claims for being rich in vitamin C and cultivated in an environmentally friendly way. Consumers were willing to pay EUR 0.10 to EUR 0.20 more for the iron-biofortified vegetables.
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Affiliation(s)
- Ann-Kristin Welk
- Faculty of Agricultural Sciences and Landscape Architecture, Osnabrück University of Applied Sciences, Am Krümpel 31, 49090 Osnabrück, Germany
| | - Clara Mehlhose
- Marketing of Agricultural and Food Products, Department of Agricultural Economics and Rural Development, University of Göttingen, Platz der Göttinger Sieben 5, 37073 Göttingen, Germany
| | - Diemo Daum
- Faculty of Agricultural Sciences and Landscape Architecture, Osnabrück University of Applied Sciences, Am Krümpel 31, 49090 Osnabrück, Germany
| | - Ulrich Enneking
- Faculty of Agricultural Sciences and Landscape Architecture, Osnabrück University of Applied Sciences, Am Krümpel 31, 49090 Osnabrück, Germany
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Losa A, Vorster J, Cominelli E, Sparvoli F, Paolo D, Sala T, Ferrari M, Carbonaro M, Marconi S, Camilli E, Reboul E, Waswa B, Ekesa B, Aragão F, Kunert K. Drought and heat affect common bean minerals and human diet—What we know and where to go. Food Energy Secur 2021. [DOI: 10.1002/fes3.351] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Alessia Losa
- Council for Research in Agriculture and Economics Research Centre for Genomics and Bioinformatics (CREA‐GB) Montanaso Italy
| | - Juan Vorster
- Department Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute University of Pretoria Pretoria South Africa
| | - Eleonora Cominelli
- National Research Council Institute of Agricultural Biology and Biotechnology (CNR‐IBBA) Milan Italy
| | - Francesca Sparvoli
- National Research Council Institute of Agricultural Biology and Biotechnology (CNR‐IBBA) Milan Italy
| | - Dario Paolo
- National Research Council Institute of Agricultural Biology and Biotechnology (CNR‐IBBA) Milan Italy
| | - Tea Sala
- Council for Research in Agriculture and Economics Research Centre for Genomics and Bioinformatics (CREA‐GB) Montanaso Italy
| | - Marika Ferrari
- Council for Agricultural Research and Economics Research Centre for Food and Nutrition (CREA‐AN) Rome Italy
| | - Marina Carbonaro
- Council for Agricultural Research and Economics Research Centre for Food and Nutrition (CREA‐AN) Rome Italy
| | - Stefania Marconi
- Council for Agricultural Research and Economics Research Centre for Food and Nutrition (CREA‐AN) Rome Italy
| | - Emanuela Camilli
- Council for Agricultural Research and Economics Research Centre for Food and Nutrition (CREA‐AN) Rome Italy
| | | | - Boaz Waswa
- International Center for Tropical Agriculture (CIAT) CIAT Regional Office for Africa Nairobi Kenya
| | - Beatrice Ekesa
- International Center for Tropical Agriculture (CIAT) CIAT Regional Office for Africa Nairobi Kenya
| | | | - Karl Kunert
- Department Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute University of Pretoria Pretoria South Africa
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Nkhata W, Shimelis H, Chirwa R. Productivity of Newly Released Common Bean (Phaseolus vulgaris L.) Varieties Under Sole Cropping and Intercropping With Maize (Zea mays L.). FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.741177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Intercropping maize (Zea mays L.) with common bean (Phaseolus vulgaris L.) is one of the predominant farming practices in eastern and southern Africa (ESA) for effective use of resources and continuous household food supply. The productivity of sole or intercropped crops is subject to variety, location, year, and their interaction. Therefore, the objective of this study was to determine the productivity of newly released common bean varieties NUA45 and SER83 under sole cropping and intercropping with a maize hybrid variety SC672 as a guide to large-scale production. Experiments were conducted at Chitedze Agricultural Research Station (13.85°S; 33.38°E) and Linthipe Extension Planning Area (12.06°S; 33.25°E) in 2019 and 2020 in Malawi using a factorial arrangement laid out in a randomized complete block design (RCBD) with four replications. The numbers of pods per plant (NPP) and seeds per pod (NSP), grain yield (GYD), and 100-seed weight were collected for common bean included, while GYD was recorded for maize. The main effects for genotype, location, year, and intercropping system were significant (p < 0.05) for GYD in common bean. The effects of the year and cropping system and location by intercropping system interaction were significant for maize GYD. The maize yield did not vary between sole cropped and intercropped systems. The total land equivalent ratios (LERs) for NUA45 and SER83 were 1.59 and 1.77, respectively. The LER-values showed a significant difference (p < 0.034), suggesting a considerably higher benefit of maize and common bean intercropping. Overall, intercropping maize with common bean rendered higher yields in the SER83/SC672 intercropping system than the sole crop in the study areas. Therefore, intra-row intercropping of the newly released common bean variety SER83 with a maize hybrid variety SC672 is recommended in the study area and other similar agro-ecologies for stable and sustainable production of both crops.
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Coelho RC, Barsotti RCF, Maltez HF, Lopes Júnior CA, Barbosa HDS. Expanding information on the bioaccessibility and bioavailability of iron and zinc in biofortified cowpea seeds. Food Chem 2021; 347:129027. [PMID: 33482485 DOI: 10.1016/j.foodchem.2021.129027] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/29/2020] [Accepted: 01/02/2021] [Indexed: 02/08/2023]
Abstract
This work presents new findings on the nutritional quality of recently introduced biofortified and non-biofortified cowpea cultivars as well as some common beans. ICP-MS was used for the measurements. Biofortified cowpea cultivars showed high levels of Fe and Zn, greater than 60 and 40 mg kg-1 dry weight, respectively. The in vitro digestion protocol enabled simultaneous evaluation of bioaccessibility and bioavailability. Fe levels in cowpea cultivars were ca. 2.5-fold higher than in common beans. Cowpea seeds also had higher Zn levels, reaching 50.1% bioaccessibility and 44.2% bioavailability. Cooking improved the availability of micronutrients in bean seeds. The cooked biofortified Aracê cowpea showed a high Zn bioavailability above 60%. Consumption of 50 g of Aracê would contribute 27% and 48% of the Fe and Zn DRI for 1-3-year-old children. The new cowpea cultivars biofortified are a potential vehicle for improving the Fe and Zn status in groups in which the micronutrient deficiency is prevalent.
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Affiliation(s)
- Ronaldo Cunha Coelho
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550 Teresina, PI, Brazil
| | - Roberto Carlos Fernandes Barsotti
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Bairro Santa Terezinha, 09210-580 Santo André, SP, Brazil; Núcleo de Ciências Químicas e Bromatológicas, Centro de Laboratório Regional de Santos, Instituto Adolfo Lutz (IAL), 11015-020 Santos, SP, Brazil
| | - Heloisa França Maltez
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Bairro Santa Terezinha, 09210-580 Santo André, SP, Brazil
| | - Cícero Alves Lopes Júnior
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550 Teresina, PI, Brazil.
| | - Herbert de Sousa Barbosa
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550 Teresina, PI, Brazil.
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7
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Zhang YY, Stockmann R, Ng K, Ajlouni S. Opportunities for plant-derived enhancers for iron, zinc, and calcium bioavailability: A review. Compr Rev Food Sci Food Saf 2020; 20:652-685. [PMID: 33443794 DOI: 10.1111/1541-4337.12669] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/08/2020] [Accepted: 10/20/2020] [Indexed: 12/31/2022]
Abstract
Understanding of the mechanism of interactions between dietary elements, their salts, and complexing/binding ligands is vital to manage both deficiency and toxicity associated with essential element bioavailability. Numerous mineral ligands are found in both animal and plant foods and are known to exert bioactivity via element chelation resulting in modulation of antioxidant capacity or micobiome metabolism among other physiological outcomes. However, little is explored in the context of dietary mineral ligands and element bioavailability enhancement, particularly with respect to ligands from plant-derived food sources. This review highlights a novel perspective to consider various plant macro/micronutrients as prospective bioavailability enhancing ligands of three essential elements (Fe, Zn, and Ca). We also delineate the molecular mechanisms of the ligand-binding interactions underlying mineral bioaccessibility at the luminal level. We conclude that despite current understandings of some of the structure-activity relationships associated with strong mineral-ligand binding, the physiological links between ligands as element carriers and uptake at targeted sites throughout the gastrointestinal (GI) tract still require more research. The binding behavior of potential ligands in the human diet should be further elucidated and validated using pharmacokinetic approaches and GI models.
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Affiliation(s)
- Yianna Y Zhang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, Australia.,CSIRO Agriculture & Food, Werribee, VIC, Australia
| | | | - Ken Ng
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, Australia
| | - Said Ajlouni
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, Australia
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8
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Hummel M, Talsma EF, Taleon V, Londoño L, Brychkova G, Gallego S, Raatz B, Spillane C. Iron, Zinc and Phytic Acid Retention of Biofortified, Low Phytic Acid, and Conventional Bean Varieties When Preparing Common Household Recipes. Nutrients 2020; 12:nu12030658. [PMID: 32121231 PMCID: PMC7146319 DOI: 10.3390/nu12030658] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/20/2020] [Accepted: 02/24/2020] [Indexed: 12/21/2022] Open
Abstract
Biofortification is an effective method to improve the nutritional content of crops and nutritional intake. Breeding for higher micronutrient mineral content in beans is correlated with an increase in phytic acid, a main inhibitor of mineral absorption in humans. Low phytic acid (lpa) beans have a 90% lower phytic acid content compared to conventional beans. This is the first study to investigate mineral and total phytic acid retention after preparing common household recipes from conventional, biofortified and lpa beans. Mineral retention was determined for two conventional, three biofortified and two lpa bean genotypes. Treatments included soaking, boiling (boiled beans) and refrying (bean paste). The average true retention of iron after boiling was 77.2-91.3%; for zinc 41.2-84.0%; and for phytic acid 49.9-85.9%. Soaking led to a significant decrease in zinc and total phytic acid after boiling and refrying, whereas for iron no significant differences were found. lpa beans did not exhibit a consistent pattern of difference in iron and phytic acid retention compared to the other groups of beans. However, lpa beans had a significantly lower retention of zinc compared to conventional and biofortified varieties (p < 0.05). More research is needed to understand the underlying factors responsible for the differences in retention between the groups of beans, especially the low retention of zinc. Combining the lpa and biofortification traits could further improve the nutritional benefits of biofortified beans, by decreasing the phytic acid:iron and zinc ratio in beans.
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Affiliation(s)
- Marijke Hummel
- Plant and AgriBiosciences Research Centre (PABC), Ryan Institute, National University of Ireland Galway, University Road, H91 REW4 Galway, Ireland; (M.H.); (G.B.)
- Division of Human Nutrition and Health, Wageningen University, 6708 PB Wageningen, The Netherlands;
| | - Elise F. Talsma
- Division of Human Nutrition and Health, Wageningen University, 6708 PB Wageningen, The Netherlands;
| | - Victor Taleon
- HarvestPlus. c/o International Food Policy Research Institute (IFPRI), Washington, DC 20005-3915, USA;
| | - Luis Londoño
- International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia; (L.L.); (S.G.); (B.R.)
| | - Galina Brychkova
- Plant and AgriBiosciences Research Centre (PABC), Ryan Institute, National University of Ireland Galway, University Road, H91 REW4 Galway, Ireland; (M.H.); (G.B.)
| | - Sonia Gallego
- International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia; (L.L.); (S.G.); (B.R.)
| | - Bodo Raatz
- International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia; (L.L.); (S.G.); (B.R.)
| | - Charles Spillane
- Plant and AgriBiosciences Research Centre (PABC), Ryan Institute, National University of Ireland Galway, University Road, H91 REW4 Galway, Ireland; (M.H.); (G.B.)
- Correspondence:
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Lockyer S, White A, Buttriss JL. Biofortified crops for tackling micronutrient deficiencies - what impact are these having in developing countries and could they be of relevance within Europe? NUTR BULL 2018. [DOI: 10.1111/nbu.12347] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - A. White
- British Nutrition Foundation; London UK
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10
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11
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Lynch S, Pfeiffer CM, Georgieff MK, Brittenham G, Fairweather-Tait S, Hurrell RF, McArdle HJ, Raiten DJ. Biomarkers of Nutrition for Development (BOND)-Iron Review. J Nutr 2018; 148:1001S-1067S. [PMID: 29878148 PMCID: PMC6297556 DOI: 10.1093/jn/nxx036] [Citation(s) in RCA: 172] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/27/2017] [Accepted: 11/07/2017] [Indexed: 12/20/2022] Open
Abstract
This is the fifth in the series of reviews developed as part of the Biomarkers of Nutrition for Development (BOND) program. The BOND Iron Expert Panel (I-EP) reviewed the extant knowledge regarding iron biology, public health implications, and the relative usefulness of currently available biomarkers of iron status from deficiency to overload. Approaches to assessing intake, including bioavailability, are also covered. The report also covers technical and laboratory considerations for the use of available biomarkers of iron status, and concludes with a description of research priorities along with a brief discussion of new biomarkers with potential for use across the spectrum of activities related to the study of iron in human health.The I-EP concluded that current iron biomarkers are reliable for accurately assessing many aspects of iron nutrition. However, a clear distinction is made between the relative strengths of biomarkers to assess hematological consequences of iron deficiency versus other putative functional outcomes, particularly the relationship between maternal and fetal iron status during pregnancy, birth outcomes, and infant cognitive, motor and emotional development. The I-EP also highlighted the importance of considering the confounding effects of inflammation and infection on the interpretation of iron biomarker results, as well as the impact of life stage. Finally, alternative approaches to the evaluation of the risk for nutritional iron overload at the population level are presented, because the currently designated upper limits for the biomarker generally employed (serum ferritin) may not differentiate between true iron overload and the effects of subclinical inflammation.
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Affiliation(s)
| | - Christine M Pfeiffer
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA
| | - Michael K Georgieff
- Division of Neonatology, Department of Pediatrics, University of Minnesota School of Medicine, Minneapolis, MN
| | - Gary Brittenham
- Division of Pediatric Hematology, Oncology and Stem Cell Transplant, Department of Pediatrics, Columbia University College of Physicians and Surgeons, New York, NY
| | - Susan Fairweather-Tait
- Department of Nutrition, Norwich Medical School, Norwich Research Park, University of East Anglia, Norwich NR4 7JT, UK
| | - Richard F Hurrell
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Harry J McArdle
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen AB21 9SB, UK
| | - Daniel J Raiten
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH)
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12
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Cominelli E, Confalonieri M, Carlessi M, Cortinovis G, Daminati MG, Porch TG, Losa A, Sparvoli F. Phytic acid transport in Phaseolus vulgaris: A new low phytic acid mutant in the PvMRP1 gene and study of the PvMRPs promoters in two different plant systems. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:1-12. [PMID: 29576062 DOI: 10.1016/j.plantsci.2018.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/02/2018] [Accepted: 02/05/2018] [Indexed: 05/24/2023]
Abstract
Phytic acid (InsP6) is the main storage form of phosphate in seeds. In the plant it plays an important role in response to environmental stress and hormonal changes. InsP6 is a strong chelator of cations, reducing the bioavailability of essential minerals in the diet. Only a common bean low phytic acid (lpa1) mutant, affected in the PvMRP1 gene, coding for a putative tonoplastic phytic acid transporter, was described so far. This mutant is devoid of negative pleiotropic effects normally characterising lpa mutants. With the aim of isolating new common bean lpa mutants, an ethyl methane sulfonate mutagenized population was screened, resulting in the identification of an additional lpa1 allele. Other putative lpa lines were also isolated. The PvMRP2 gene is probably able to complement the phenotype of mutants affected in the PvMRP1 gene in tissues other than the seed. Only the PvMRP1 gene is expressed at appreciable levels in cotyledons. Arabidopsis thaliana and Medicago truncatula transgenic plants harbouring 1.5 kb portions of the intergenic 5' sequences of both PvMRP genes, fused upstream of the GUS reporter, were generated. GUS activity in different organs suggests a refined, species-specific mechanisms of regulation of gene expression for these two PvMRP genes.
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Affiliation(s)
- Eleonora Cominelli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Massimo Confalonieri
- CREA Research Centre for Animal Production and Aquaculture (CREA-ZA), Viale Piacenza 29, 26900, Lodi, Italy.
| | - Martina Carlessi
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; Present address: Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Via G. Guidiccioni, 8-10, 56010 Ghezzano (Pisa), Italy.
| | - Gaia Cortinovis
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Maria Gloria Daminati
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Timothy G Porch
- USDA-ARS, Tropical Agriculture Research Station, 2200 P.A. Campos Avenue, Suite 201, Mayaguez, 00680, Puerto Rico.
| | - Alessia Losa
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; CREA Research Centre for Genomics and Bioinformatics (CREA-GB), Via Paullese 28, 26836 Montanaso Lombardo, Lodi, Italy.
| | - Francesca Sparvoli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
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Santiago-Ramos D, Figueroa-Cárdenas JDD, Véles-Medina JJ, Salazar R. Physicochemical properties of nixtamalized black bean (Phaseolus vulgaris L.) flours. Food Chem 2018; 240:456-462. [DOI: 10.1016/j.foodchem.2017.07.156] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 07/19/2017] [Accepted: 07/28/2017] [Indexed: 11/16/2022]
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14
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Vazquez-Gutierrez P, Stevens MJA, Gehrig P, Barkow-Oesterreicher S, Lacroix C, Chassard C. The extracellular proteome of two Bifidobacterium species reveals different adaptation strategies to low iron conditions. BMC Genomics 2017; 18:41. [PMID: 28061804 PMCID: PMC5219805 DOI: 10.1186/s12864-016-3472-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 12/26/2016] [Indexed: 12/30/2022] Open
Abstract
Background Bifidobacteria are among the first anaerobic bacteria colonizing the gut. Bifidobacteria require iron for growth and their iron-sequestration mechanisms are important for their fitness and possibly inhibit enteropathogens. Here we used combined genomic and proteomic analyses to characterize adaptations to low iron conditions of B. kashiwanohense PV20-2 and B. pseudolongum PV8-2, 2 strains isolated from the feces of iron-deficient African infants and selected for their high iron-sequestering ability. Results Analyses of the genome contents revealed evolutionary adaptation to low iron conditions. A ferric and a ferrous iron operon encoding binding proteins and transporters were found in both strains. Remarkably, the ferric iron operon of B. pseudolongum PV8-2 is not found in other B. pseudolongum strains and likely acquired via horizontal gene transfer. The genome B. kashiwanohense PV20-2 harbors a unique region encoding genes putatively involved in siderophore production. Additionally, the secretomes of the two strains grown under low-iron conditions were analyzed using a combined genomic-proteomic approach. A ferric iron transporter was found in the secretome of B. pseudolongum PV8-2, while ferrous binding proteins were detected in the secretome of B. kashiwanohense PV20-2, suggesting different strategies to take up iron in the strains. In addition, proteins such as elongation factors, a glyceraldehyde-3-phosphate dehydrogenase, and the stress proteins GroEL and DnaK were identified in both secretomes. These proteins have been previously associated with adhesion of lactobacilli to epithelial cells. Conclusion Analyses of the genome and secretome of B. kashiwanohense PV20-2 and B. pseudolongum PV8-2 revealed different adaptations to low iron conditions and identified extracellular proteins for iron transport. The identified extracellular proteins might be involved in competition for iron in the gastrointestinal tract. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-3472-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pamela Vazquez-Gutierrez
- Laboratory of Food Biotechnology, ETH Zurich, Institute of Food, Nutrition and Health, Schmelzbergstrasse 7, 8092, Zurich, Switzerland
| | - Marc J A Stevens
- Laboratory of Food Biotechnology, ETH Zurich, Institute of Food, Nutrition and Health, Schmelzbergstrasse 7, 8092, Zurich, Switzerland
| | - Peter Gehrig
- Functional Genomics Center Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | | | - Christophe Lacroix
- Laboratory of Food Biotechnology, ETH Zurich, Institute of Food, Nutrition and Health, Schmelzbergstrasse 7, 8092, Zurich, Switzerland.
| | - Christophe Chassard
- Laboratory of Food Biotechnology, ETH Zurich, Institute of Food, Nutrition and Health, Schmelzbergstrasse 7, 8092, Zurich, Switzerland.,Present Address: Institut National de la Recherche Agronomique, UR 545 URF, 15000, Aurillac, France
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15
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Prentice AM, Mendoza YA, Pereira D, Cerami C, Wegmuller R, Constable A, Spieldenner J. Dietary strategies for improving iron status: balancing safety and efficacy. Nutr Rev 2017; 75:49-60. [PMID: 27974599 PMCID: PMC5155616 DOI: 10.1093/nutrit/nuw055] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In light of evidence that high-dose iron supplements lead to a range of adverse events in low-income settings, the safety and efficacy of lower doses of iron provided through biological or industrial fortification of foodstuffs is reviewed. First, strategies for point-of-manufacture chemical fortification are compared with biofortification achieved through plant breeding. Recent insights into the mechanisms of human iron absorption and regulation, the mechanisms by which iron can promote malaria and bacterial infections, and the role of iron in modifying the gut microbiota are summarized. There is strong evidence that supplemental iron given in nonphysiological amounts can increase the risk of bacterial and protozoal infections (especially malaria), but the use of lower quantities of iron provided within a food matrix, ie, fortified food, should be safer in most cases and represents a more logical strategy for a sustained reduction of the risk of deficiency by providing the best balance of risk and benefits. Further research into iron compounds that would minimize the availability of unabsorbed iron to the gut microbiota is warranted.
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Affiliation(s)
- Andrew M Prentice
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
| | - Yery A Mendoza
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Dora Pereira
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Carla Cerami
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Rita Wegmuller
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Anne Constable
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Jörg Spieldenner
- A.M. Prentice, D. Pereira, C. Cerami, and R. Wegmuller are with the Medical Research Council (MRC) Unit The Gambia, Fajara, Banjul, The Gambia. A.M. Prentice and R. Wegmuller are with the MRC International Nutrition Group, London School of Hygiene & Tropical Medicine, London, United Kingdom. Y.A. Mendoza, A. Constable, and J. Spieldenner are with the Nestlé Research Centre, Lausanne, Switzerland. D. Pereira is with the Department of Pathology, University of Cambridge, Cambridge, United Kingdom. C. Cerami is with the Division of Infectious Diseases, Institute for Global Health & Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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16
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The Combined Application of the Caco-2 Cell Bioassay Coupled with In Vivo (Gallus gallus) Feeding Trial Represents an Effective Approach to Predicting Fe Bioavailability in Humans. Nutrients 2016; 8:nu8110732. [PMID: 27869705 PMCID: PMC5133116 DOI: 10.3390/nu8110732] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 11/09/2016] [Indexed: 12/28/2022] Open
Abstract
Research methods that predict Fe bioavailability for humans can be extremely useful in evaluating food fortification strategies, developing Fe-biofortified enhanced staple food crops and assessing the Fe bioavailability of meal plans that include such crops. In this review, research from four recent poultry (Gallus gallus) feeding trials coupled with in vitro analyses of Fe-biofortified crops will be compared to the parallel human efficacy studies which used the same varieties and harvests of the Fe-biofortified crops. Similar to the human studies, these trials were aimed to assess the potential effects of regular consumption of these enhanced staple crops on maintenance or improvement of iron status. The results demonstrate a strong agreement between the in vitro/in vivo screening approach and the parallel human studies. These observations therefore indicate that the in vitro/Caco-2 cell and Gallus gallus models can be integral tools to develop varieties of staple food crops and predict their effect on iron status in humans. The cost-effectiveness of this approach also means that it can be used to monitor the nutritional stability of the Fe-biofortified crop once a variety has released and integrated into the food system. These screening tools therefore represent a significant advancement to the field for crop development and can be applied to ensure the sustainability of the biofortification approach.
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Castro-Guerrero NA, Isidra-Arellano MC, Mendoza-Cozatl DG, Valdés-López O. Common Bean: A Legume Model on the Rise for Unraveling Responses and Adaptations to Iron, Zinc, and Phosphate Deficiencies. FRONTIERS IN PLANT SCIENCE 2016; 7:600. [PMID: 27200068 PMCID: PMC4853408 DOI: 10.3389/fpls.2016.00600] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/18/2016] [Indexed: 05/19/2023]
Abstract
Common bean (Phaseolus vulgaris) was domesticated ∼8000 years ago in the Americas and today is a staple food worldwide. Besides caloric intake, common bean is also an important source of protein and micronutrients and it is widely appreciated in developing countries for their affordability (compared to animal protein) and its long storage life. As a legume, common bean also has the economic and environmental benefit of associating with nitrogen-fixing bacteria, thus reducing the use of synthetic fertilizers, which is key for sustainable agriculture. Despite significant advances in the plant nutrition field, the mechanisms underlying the adaptation of common bean to low nutrient input remains largely unknown. The recent release of the common bean genome offers, for the first time, the possibility of applying techniques and approaches that have been exclusive to model plants to study the adaptive responses of common bean to challenging environments. In this review, we discuss the hallmarks of common bean domestication and subsequent distribution around the globe. We also discuss recent advances in phosphate, iron, and zinc homeostasis, as these nutrients often limit plant growth, development, and yield. In addition, iron and zinc are major targets of crop biofortification to improve human nutrition. Developing common bean varieties able to thrive under nutrient limiting conditions will have a major impact on human nutrition, particularly in countries where dry beans are the main source of carbohydrates, protein and minerals.
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Affiliation(s)
- Norma A. Castro-Guerrero
- Plant Sciences, Christopher S. Bond Life Sciences Center, University of Missouri, ColumbiaMO, USA
| | - Mariel C. Isidra-Arellano
- Laboratorio de Genómica Funcional de Leguminosas, FES Iztacala, Universidad Nacional Autónoma de MéxicoCiudad de México, México
| | - David G. Mendoza-Cozatl
- Plant Sciences, Christopher S. Bond Life Sciences Center, University of Missouri, ColumbiaMO, USA
| | - Oswaldo Valdés-López
- Laboratorio de Genómica Funcional de Leguminosas, FES Iztacala, Universidad Nacional Autónoma de MéxicoCiudad de México, México
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18
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Petry N, Rohner F, Gahutu JB, Campion B, Boy E, Tugirimana PL, Zimmerman MB, Zwahlen C, Wirth JP, Moretti D. In Rwandese Women with Low Iron Status, Iron Absorption from Low-Phytic Acid Beans and Biofortified Beans Is Comparable, but Low-Phytic Acid Beans Cause Adverse Gastrointestinal Symptoms. J Nutr 2016; 146:970-5. [PMID: 27029940 DOI: 10.3945/jn.115.223693] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 02/19/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Phytic acid (PA) is a major inhibitor of iron bioavailability from beans, and high PA concentrations might limit the positive effect of biofortified beans (BBs) on iron status. Low-phytic acid (lpa) bean varieties could increase iron bioavailability. OBJECTIVE We set out to test whether lpa beans provide more bioavailable iron than a BB variety when served as part of a composite meal in a bean-consuming population with low iron status. METHODS Dietary iron absorption from lpa, iron-biofortified, and control beans (CBs) (regular iron and PA concentrations) was compared in 25 nonpregnant young women with low iron status with the use of a multiple-meal crossover design. Iron absorption was measured with stable iron isotopes. RESULTS PA concentration in lpa beans was ∼10% of BBs and CBs, and iron concentration in BBs was ∼2- and 1.5-fold compared with CBs and lpa beans, respectively. Fractional iron absorption from lpa beans [8.6% (95% CI: 4.8%, 15.5%)], BBs [7.3% (95% CI: 4.0%, 13.4%)], and CBs [8.0% (95% CI: 4.4%, 14.6%)] did not significantly differ. The total amount of iron absorbed from lpa beans and BBs was 421 μg (95% CI: 234, 756 μg) and 431 μg (95% CI: 237, 786 μg), respectively, and did not significantly differ, but was >50% higher (P < 0.005) than from CBs (278 μg; 95% CI: 150, 499 μg). In our trial, the lpa beans were hard to cook, and their consumption caused transient adverse digestive side effects in ∼95% of participants. Gel electrophoresis analysis showed phytohemagglutinin L (PHA-L) residues in cooked lpa beans. CONCLUSION BBs and lpa beans provided more bioavailable iron than control beans and could reduce dietary iron deficiency. Digestive side effects of lpa beans were likely caused by PHA-L, but it is unclear to what extent the associated digestive problems reduced iron bioavailability. This trial was registered at clinicaltrials.gov as NCT02215278.
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Affiliation(s)
| | | | - Jean Bosco Gahutu
- Department of Medical Biology, School of Medicine and Pharmacy, College of Medicine and Health Sciences, University of Rwanda, Huye, Rwanda
| | - Bruno Campion
- Council for Agricultural Research and Analysis of Agricultural Economics, Montanaso Lombardo, Italy
| | - Erick Boy
- International Food Policy Research Institute, Washington, DC; and
| | - Pierrot L Tugirimana
- Department of Medical Biology, School of Medicine and Pharmacy, College of Medicine and Health Sciences, University of Rwanda, Huye, Rwanda
| | | | | | | | - Diego Moretti
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
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19
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Zielińska-Dawidziak M. Plant ferritin--a source of iron to prevent its deficiency. Nutrients 2015; 7:1184-201. [PMID: 25685985 PMCID: PMC4344583 DOI: 10.3390/nu7021184] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 02/03/2015] [Indexed: 12/20/2022] Open
Abstract
Iron deficiency anemia affects a significant part of the human population. Due to the unique properties of plant ferritin, food enrichment with ferritin iron seems to be a promising strategy to prevent this malnutrition problem. This protein captures huge amounts of iron ions inside the apoferritin shell and isolates them from the environment. Thus, this iron form does not induce oxidative change in food and reduces the risk of gastric problems in consumers. Bioavailability of ferritin in human and animal studies is high and the mechanism of absorption via endocytosis has been confirmed in cultured cells. Legume seeds are a traditional source of plant ferritin. However, even if the percentage of ferritin iron in these seeds is high, its concentration is not sufficient for food fortification. Thus, edible plants have been biofortified in iron for many years. Plants overexpressing ferritin may find applications in the development of bioactive food. A crucial achievement would be to develop technologies warranting stability of ferritin in food and the digestive tract.
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Affiliation(s)
- Magdalena Zielińska-Dawidziak
- Department of Food Biochemistry and Analysis, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, 60-623 Poznań, Poland.
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20
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Petry N, Boy E, Wirth JP, Hurrell RF. Review: The potential of the common bean (Phaseolus vulgaris) as a vehicle for iron biofortification. Nutrients 2015; 7:1144-73. [PMID: 25679229 PMCID: PMC4344581 DOI: 10.3390/nu7021144] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 01/29/2015] [Indexed: 12/11/2022] Open
Abstract
Common beans are a staple food and the major source of iron for populations in Eastern Africa and Latin America. Bean iron concentration is high and can be further increased by biofortification. A major constraint to bean iron biofortification is low iron absorption, attributed to inhibitory compounds such as phytic acid (PA) and polyphenol(s) (PP). We have evaluated the usefulness of the common bean as a vehicle for iron biofortification. High iron concentrations and wide genetic variability have enabled plant breeders to develop high iron bean varieties (up to 10 mg/100 g). PA concentrations in beans are high and tend to increase with iron biofortification. Short-term human isotope studies indicate that iron absorption from beans is low, PA is the major inhibitor, and bean PP play a minor role. Multiple composite meal studies indicate that decreasing the PA level in the biofortified varieties substantially increases iron absorption. Fractional iron absorption from composite meals was 4%–7% in iron deficient women; thus the consumption of 100 g biofortified beans/day would provide about 30%–50% of their daily iron requirement. Beans are a good vehicle for iron biofortification, and regular high consumption would be expected to help combat iron deficiency (ID).
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Affiliation(s)
- Nicolai Petry
- Groundwork LLC, Crans-près-Céligny 1299 Switzerland.
| | - Erick Boy
- International Food Policy Research Institute, Washington, DC 20006-1002, USA.
| | - James P Wirth
- Groundwork LLC, Crans-près-Céligny 1299 Switzerland.
| | - Richard F Hurrell
- Institute of Food, Nutrition and Health, Laboratory of Human Nutrition, ETH Zurich, 8092 Zurich, Switzerland.
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