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Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique

BACKGROUND: Knowledge of the physiologic requirement for iron, the core index for the formulation of a dietary reference intake (DRI), is of great importance for the health of a pregnant woman and her fetus, and can help a mother accurately plan her iron supplementation. However, direct measurements...

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Autores principales: Cai, Jie, Ren, Tongxiang, Lu, Jiaxi, Wu, Jinghuan, Mao, Deqian, Li, Weidong, Zhang, Yu, Li, Min, Piao, Jianhua, Yang, Lichen, Ma, Yuxia, Wang, Jun, Yang, Xiaoguang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175517/
https://www.ncbi.nlm.nih.gov/pubmed/32336977
http://dx.doi.org/10.1186/s12986-020-00452-0
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author Cai, Jie
Ren, Tongxiang
Lu, Jiaxi
Wu, Jinghuan
Mao, Deqian
Li, Weidong
Zhang, Yu
Li, Min
Piao, Jianhua
Yang, Lichen
Ma, Yuxia
Wang, Jun
Yang, Xiaoguang
author_facet Cai, Jie
Ren, Tongxiang
Lu, Jiaxi
Wu, Jinghuan
Mao, Deqian
Li, Weidong
Zhang, Yu
Li, Min
Piao, Jianhua
Yang, Lichen
Ma, Yuxia
Wang, Jun
Yang, Xiaoguang
author_sort Cai, Jie
collection PubMed
description BACKGROUND: Knowledge of the physiologic requirement for iron, the core index for the formulation of a dietary reference intake (DRI), is of great importance for the health of a pregnant woman and her fetus, and can help a mother accurately plan her iron supplementation. However, direct measurements of the physiologic requirement for iron during pregnancy are still lacking. METHOD: Eleven women of reproductive age from Hebei Province, China, who planned to become pregnant in the near future, were enrolled between January and March 2015 and included in the final analysis. Subjects participated in a 2-week metabolic trial in which they consumed 50 mg of the stable isotope (58)Fe, and were then followed for ~ 2 years. The abundance of (58)Fe and the total iron concentration in the circulation were measured using Multi-collector Inductively-Coupled Plasma Mass Spectrometry and Atomic Absorption Spectroscopy, respectively. The physiologic requirement for iron during pregnancy was then calculated by the formula derived from our previously published work. RESULTS: The mean physiologic requirement for iron in the 11 subjects, across their entire pregnancies, was 3.05 mg.d(− 1) in total and 44.0 μg.kg(− 1).d(− 1) after adjustment for body mass. The physiologic requirements for iron in the first, second, and third trimesters were 2.04 mg.d(− 1), 3.26 mg.d(− 1), and 4.13 mg.d(− 1), respectively. When adjusted for body mass, the physiologic requirements for iron in different trimesters were 32.3 μg.kg(− 1).d(− 1), 46.9 μg.kg(− 1).d(− 1), and 55.7 μg.kg(− 1).d(− 1), respectively. CONCLUSION: We preliminarily explored the physiologic requirement for iron in pregnant women. The data demonstrated that pregnant women needed about twice iron than non-pregnant women. This research may be helpful for the design of future studies and the modification of iron DRIs. TRIAL REGISTRATION: ChiCTR, ChiCTR-OCH-14004302. Registered 14 February 2014, http://www.chictr.org.cn/showproj.aspx?proj=5267
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spelling pubmed-71755172020-04-24 Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique Cai, Jie Ren, Tongxiang Lu, Jiaxi Wu, Jinghuan Mao, Deqian Li, Weidong Zhang, Yu Li, Min Piao, Jianhua Yang, Lichen Ma, Yuxia Wang, Jun Yang, Xiaoguang Nutr Metab (Lond) Research BACKGROUND: Knowledge of the physiologic requirement for iron, the core index for the formulation of a dietary reference intake (DRI), is of great importance for the health of a pregnant woman and her fetus, and can help a mother accurately plan her iron supplementation. However, direct measurements of the physiologic requirement for iron during pregnancy are still lacking. METHOD: Eleven women of reproductive age from Hebei Province, China, who planned to become pregnant in the near future, were enrolled between January and March 2015 and included in the final analysis. Subjects participated in a 2-week metabolic trial in which they consumed 50 mg of the stable isotope (58)Fe, and were then followed for ~ 2 years. The abundance of (58)Fe and the total iron concentration in the circulation were measured using Multi-collector Inductively-Coupled Plasma Mass Spectrometry and Atomic Absorption Spectroscopy, respectively. The physiologic requirement for iron during pregnancy was then calculated by the formula derived from our previously published work. RESULTS: The mean physiologic requirement for iron in the 11 subjects, across their entire pregnancies, was 3.05 mg.d(− 1) in total and 44.0 μg.kg(− 1).d(− 1) after adjustment for body mass. The physiologic requirements for iron in the first, second, and third trimesters were 2.04 mg.d(− 1), 3.26 mg.d(− 1), and 4.13 mg.d(− 1), respectively. When adjusted for body mass, the physiologic requirements for iron in different trimesters were 32.3 μg.kg(− 1).d(− 1), 46.9 μg.kg(− 1).d(− 1), and 55.7 μg.kg(− 1).d(− 1), respectively. CONCLUSION: We preliminarily explored the physiologic requirement for iron in pregnant women. The data demonstrated that pregnant women needed about twice iron than non-pregnant women. This research may be helpful for the design of future studies and the modification of iron DRIs. TRIAL REGISTRATION: ChiCTR, ChiCTR-OCH-14004302. Registered 14 February 2014, http://www.chictr.org.cn/showproj.aspx?proj=5267 BioMed Central 2020-04-21 /pmc/articles/PMC7175517/ /pubmed/32336977 http://dx.doi.org/10.1186/s12986-020-00452-0 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Cai, Jie
Ren, Tongxiang
Lu, Jiaxi
Wu, Jinghuan
Mao, Deqian
Li, Weidong
Zhang, Yu
Li, Min
Piao, Jianhua
Yang, Lichen
Ma, Yuxia
Wang, Jun
Yang, Xiaoguang
Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title_full Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title_fullStr Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title_full_unstemmed Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title_short Physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
title_sort physiologic requirement for iron in pregnant women, assessed using the stable isotope tracer technique
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175517/
https://www.ncbi.nlm.nih.gov/pubmed/32336977
http://dx.doi.org/10.1186/s12986-020-00452-0
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