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Ciulei MA, Gallagher K, Ba DM, Beck C, Pobee RA, Gernand AD, Walker RE. Iron status and anemia in a representative sample of US pregnant women is not associated with pre-pregnancy BMI: Results from the NHANES (1999-2010) study. PLoS One 2024; 19:e0300912. [PMID: 39255312 PMCID: PMC11386453 DOI: 10.1371/journal.pone.0300912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 07/23/2024] [Indexed: 09/12/2024] Open
Abstract
Iron deficiency in pregnancy is related to many poor health outcomes, including anemia and low birth weight. A small number of previous studies have identified maternal body mass index (BMI) as a potential risk factor for poor iron status. Our objective was to examine the association between pre-pregnancy BMI, iron status, and anemia in a nationally representative sample of US adult women. We used data from the National Health and Nutrition Examination Survey (NHANES; 1999-2010) for pregnant women ages 18-49 years (n = 1156). BMI (kg/m2) was calculated using pre-pregnancy weight (self-reported) and height (measured at examination). Iron deficiency (ID) was defined as total body iron (calculated from serum ferritin and transferrin receptor using Cook's equation) < 0 mg/kg and anemia as hemoglobin < 11 g/dL. Associations were examined using weighted linear and Poisson regression models, adjusted for confounders (age, race/ethnicity, education, and trimester). Approximately 14% of pregnant women had ID and 8% had anemia in this sample. Ferritin and total body iron trended slightly lower (p = 0.12, p = 0.14) in women with pre-pregnancy BMI in the normal and overweight categories compared to the underweight and obese categories; hemoglobin concentrations were similar across BMI groups (p = 0.76). There were no differences in the prevalence of ID or anemia in women with pre-pregnancy overweight and obesity (ID: overweight, adjusted prevalence ratio (PR) = 1.27, 95%CI: 0.89-1.82; obesity, PR = 0.75, 95%CI: 0.39-1.45; anemia: overweight, PR = 1.08, 95%CI: 0.53-2.19; obesity, PR = 0.99, 95%CI: 0.49-2.01) compared to women with a normal BMI. Findings from these US nationally representative data indicate that total body iron, serum hemoglobin, ID, and anemia in pregnancy do not differ by pre-pregnancy BMI. Since ID and anemia during pregnancy remain significant public health concerns, NHANES should consider measuring current iron status in upcoming cycles.
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Affiliation(s)
- Mihaela A Ciulei
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Kelly Gallagher
- Ross and Carol Nese College of Nursing, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Djibril M Ba
- Department of Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Celeste Beck
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Ruth A Pobee
- Department of Emergency Medicine, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Alison D Gernand
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Rachel E Walker
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
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Ssewanyana D, Borque SL, Lye SJ, Matthews SG. Hepcidin across pregnancy and its correlation with maternal markers of iron and inflammation, maternal body weight outcomes, and offspring neurodevelopmental outcomes: a systematic review and meta-analysis. AJOG GLOBAL REPORTS 2023; 3:100222. [PMID: 37645642 PMCID: PMC10461250 DOI: 10.1016/j.xagr.2023.100222] [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: 08/31/2023] Open
Abstract
OBJECTIVE This study evaluated the correlation between maternal hepcidin and other biomarkers of iron status, markers of inflammation, and maternal body weight during pregnancy, as well as neurodevelopment in the offspring. DATA SOURCES PubMed, Web of Science, Scopus, and Embase were searched from inception until March 2022. STUDY ELIGIBILITY CRITERIA Studies conducted among pregnant women without apparent pregnancy complications were included. Eligible studies reported correlation coefficients between maternal hepcidin and any outcomes of maternal biomarkers of iron status or inflammatory load during pregnancy, prenatal maternal body weight, and offspring neurodevelopment. Studies without correlation data were eligible if they quantitatively reported volumes of both maternal hepcidin and any marker of iron status and/or inflammatory load during gestation. METHODS Pooled correlation coefficients between maternal hepcidin and outcomes of interest were calculated using the Fisher r-to-Z transformation. Both fixed-effects and DerSimonian and Laird random-effects models were used to calculate pooled correlation coefficient. When meta-analysis was not feasible, results were descriptively synthesized. RESULTS Forty-six studies with 6624 participants were eligible. Hepcidin was significantly correlated with hemoglobin in the third trimester (r=0.21; 95% confidence interval, 0.1-0.32); ferritin in the first (r=0.31; 95% confidence interval, 0.01-0.61) and third trimester (r=0.35; 95% confidence interval, 0.23-0.48); soluble transferrin receptor in the second trimester (r=-0.27; 95% confidence interval, -0.4 to -0.14); total iron-binding capacity in the second trimester (r=0.37; 95% confidence interval, 0.24-0.50); and serum iron in the third trimester (r=0.11; 95% confidence interval, 0.02-0.19). Hepcidin was significantly correlated with the inflammatory marker interleukin-6 in the third trimester (r=0.26; 95% confidence interval, 0.17-0.34) and C-reactive protein in the second (r=0.16; 95% confidence interval, 0.03-0.30) and third trimester (r=0.28; 95% confidence interval, 0.04-0.52). Four out of 5 studies reported weak-to-moderate positive correlation between hepcidin and body mass index. Hepcidin levels varied across body mass index categories. No single study reported the relationship between maternal hepcidin and neurodevelopment in offspring. CONCLUSION Hepcidin weakly to moderately correlates with biomarkers of iron and inflammation in pregnancy.
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Affiliation(s)
- Derrick Ssewanyana
- Departments of Physiology (Drs Ssewanyana, Lye, and Matthews)
- Medicine (Drs Ssewanyana, Lye, and Matthews), University of Toronto, Toronto, Canada
- Alliance for Human Development, Lunenfeld-Tanenbaum Research Institute, Toronto, Canada (Drs Ssewanyana, Lye, and Matthews)
| | - Stephane L. Borque
- Department of Anesthesiology and Pain Medicine and Pharmacology, University of Alberta, Edmonton, Canada (Dr Borque)
| | - Stephen J. Lye
- Departments of Physiology (Drs Ssewanyana, Lye, and Matthews)
- Medicine (Drs Ssewanyana, Lye, and Matthews), University of Toronto, Toronto, Canada
- Alliance for Human Development, Lunenfeld-Tanenbaum Research Institute, Toronto, Canada (Drs Ssewanyana, Lye, and Matthews)
| | - Stephen G. Matthews
- Departments of Physiology (Drs Ssewanyana, Lye, and Matthews)
- Medicine (Drs Ssewanyana, Lye, and Matthews), University of Toronto, Toronto, Canada
- Alliance for Human Development, Lunenfeld-Tanenbaum Research Institute, Toronto, Canada (Drs Ssewanyana, Lye, and Matthews)
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Satué K, Fazio E, La Fauci D, Bruschetta G, Medica P. Adaptive response of estrogen-iron axis in pregnant Purebred Spanish mares of different age. J Equine Vet Sci 2023:104827. [PMID: 37247748 DOI: 10.1016/j.jevs.2023.104827] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 05/31/2023]
Abstract
The maintenance of iron (Fe) homeostasis is vital for the physiological function along life. In sexually mature humans and experimental animals, estrogens downregulate hepcidin (Hpc) expression, in order to improve the intestinal absorption and to mobilize Fe stores for maternal erythropoietic expansion and placental development. However, changes of these mechanisms related to regulation of Hpc on the availability of Fe during gestation with advancing age in mares, remain unknown. The objective of this study was to evaluate the interrelationships between serum Fe, Ferritin (Ferr) and Hpc with estrone (E1) and estradiol-17β (E2) concentrations in pregnant mares of different ages. Blood samples were taken from 40 pregnant Spanish Purebred mares belonging to 4 different age groups, 10 subjects for each group: 4-6 years, 7-9 years, 10-12 years, and > 12 years were used in this study. Fe concentrations of 4-6 and 7-9 years groups were higher (P < .01) than 10-12 and >12 years groups. Ferr concentrations of 4-6 years group were higher (P < .01) than other groups. Hpc concentrations increased and E1 decreased (P < .01) in > 12 years group compared to other age groups. E2 concentrations of 7-9, 10-12 and >12 years groups were higher (P < .01) than those of 4-6 years group; 7-9 years group had higher E2 concentrations (P < .01) than > 12 years group. Fe and Ferr were negatively correlated with Hpc (r = -0.81 and r = -0.67, respectively). E1 and E2 were negatively correlated with Fe (r = -0.23 and r = -0.11, respectively). E2 was positively correlated with Hpc (r = 0.78). In pregnant Spanish Purebred mare, the increase of estrogens, according to the more efficient iron status in response to Hpc inhibition and consequent mobilization of circulating and iron reserve, shows the existence of "estrogen-iron axis" in young mares. Nevertheless, these mechanisms are reversed in old mares, suggesting a less efficient iron metabolism with advancing age. It is hoped that new investigations are needed to understand in depth and clarify further the complex metabolic and hormonal mechanisms involved also in equine species.
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Affiliation(s)
- Katiuska Satué
- Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, CEU-Cardenal Herrera University, Tirant lo Blanc, 7, Alfara del Patriarca, 46115 Valencia, Spain.
| | - Esterina Fazio
- Department of Veterinary Sciences, Veterinary Physiology Unit, Polo Universitario Annunziata, Via Palatucci 13, 98168, Messina, Italy
| | - Deborah La Fauci
- Department of Veterinary Sciences, Veterinary Physiology Unit, Polo Universitario Annunziata, Via Palatucci 13, 98168, Messina, Italy
| | - Giuseppe Bruschetta
- Department of Veterinary Sciences, Biochemistry Unit, Polo Universitario Annunziata, Via Palatucci 13, 98168, Messina, Italy
| | - Pietro Medica
- Department of Veterinary Sciences, Veterinary Physiology Unit, Polo Universitario Annunziata, Via Palatucci 13, 98168, Messina, Italy
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The relationship between anemia and obesity. Expert Rev Hematol 2022; 15:911-926. [PMID: 36189499 DOI: 10.1080/17474086.2022.2131521] [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: 01/19/2023]
Abstract
INTRODUCTION Obesity is linked to a variety of unfavourable outcomes, including anaemia, which is a serious global public health problem. The prevalence of obesity along with anaemia suggests a relationship between obesity and anaemia. Recent studies have demonstrated strong associations between anaemia and obesity, chronic diseases, ageing, hepato-renal impairment, chronic infection, autoimmune diseases, and widespread malignancy. Thus, the intersection point of obesity and anaemia is an important area of attention. AREA COVERED This paper reviews the pathophysiology of obesity and anaemia. Then, It deliberates the relationship between obesity and different types of anaemia and other clinical forms associated with anaemia. EXPERT OPINION Obesity, especially obesity-related to excessive visceral fat distribution, is accompanied by several disturbances at the endothelial, hormonal, and inflammatory levels. These disturbances induce activation of several mechanisms that contribute to the anaemic state. Over-weight patients with chronic anaemias are required to maintain the related vitamins and minerals at optimum levels and appropriate BMI. In addition, a regular clinical follow-up is essential to be scheduled to reduce the risk of complications associated with anaemia in obese patients.
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Pregnancy as a Fundamental Determinant of Child Health: a Review. Curr Nutr Rep 2022; 11:457-485. [PMID: 35789475 DOI: 10.1007/s13668-022-00416-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE OF REVIEW Maternal conditions and exposures during pregnancy including over- and undernutrition are associated with poor childbirth outcomes, growth, development and chronic childhood diseases. We examined contemporary pregnancy-related determinants of child health. RECENT FINDINGS While maternal undernutrition remains a major contributor to low birth weight, maternal obesity affects foetal growth, birth weight, survival and is associated with childhood obesity, asthma and autistic spectrum disorders. Emerging evidence suggests that epigenetic changes, the prenatal microbiome and maternal immune activation (MIA), a neuroinflammatory process induced by diet and other exposures cause foetal programming resulting in these chronic childhood diseases. Maternal diet is potentially a modifiable risk factor for controlling low birth weight, obesity and chronic disease in childhood. Further studies are warranted to refine guidance on dietary restriction and physical activity during pregnancy and determine how MIA and prenatal microbiota can be applied to control childhood diseases arising from programming.
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Barrea L, Vetrani C, Verde L, Frias-Toral E, Garcia-Velasquez E, Ranasinghe P, Mendez V, Jayawardena R, Savastano S, Colao A, Muscogiuri G. Gestational obesity: An unconventional endocrine disruptor for the fetus. Biochem Pharmacol 2022; 198:114974. [PMID: 35202578 DOI: 10.1016/j.bcp.2022.114974] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 12/16/2022]
Abstract
Obesity has reached pandemic proportions and is a growing concern throughout the world. A parallel trend has also been observed among women in reproductive age, leading to the increasing global prevalence of gestational obesity (GO). The well-known obesity-related health problems also extend to pregnancy, where they are responsible for giving rise to a variety of medical and obstetrical complications, resulting in an increased incidence of adverse maternal and fetal outcomes. In this context, several epidemiological and clinical studies have shown that nutritional changes through different stages of gestation can have a substantial impact on the future health and development of the child. Therefore, it is clear that GO is a modifiable endocrine disruptor that negatively influences the health of the fetus and the newborn, with long-term metabolic implications. This review aims to describe the impact of GO on maternal and fetal outcomes using the available scientific literature and highlighting the evidence-based nutritional approaches currently recommended for the management of GO.
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Affiliation(s)
- Luigi Barrea
- Dipartimento di Scienze Umanistiche, Università Telematica Pegaso, 80143 Napoli, Italy; Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Naples, Italy
| | - Claudia Vetrani
- Dipartimento di Medicina Clinica e Chirurgia, Endocrinology Unit, University Federico II, Italy
| | - Ludovica Verde
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Naples, Italy
| | - Evelyn Frias-Toral
- Universidad Católica Santiago de Guayaquil, Av Pdte. Carlos Julio Arosemena Tola, Guayaquil 090615, Ecuador
| | | | - Priyanga Ranasinghe
- Department of Pharmacology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Verna Mendez
- Department of Internal Medicine, Hospital General de Zona 49, Mexican Institute of Social Security, Los Mochis, Sinaloa, Mexico
| | - Ranil Jayawardena
- Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka; Queensland University of Technology (QUT), Faculty of Health, School of Exercise and Nutrition Sciences, Brisbane, Queensland, Australia
| | - Silvia Savastano
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Naples, Italy; Dipartimento di Medicina Clinica e Chirurgia, Endocrinology Unit, University Federico II, Italy
| | - Annamaria Colao
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Naples, Italy; Dipartimento di Medicina Clinica e Chirurgia, Endocrinology Unit, University Federico II, Italy; Cattedra Unesco "Educazione alla salute e allo sviluppo sostenibile", University Federico II, Italy
| | - Giovanna Muscogiuri
- Centro Italiano per la cura e il Benessere del paziente con Obesità (C.I.B.O), Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Naples, Italy; Dipartimento di Medicina Clinica e Chirurgia, Endocrinology Unit, University Federico II, Italy; Cattedra Unesco "Educazione alla salute e allo sviluppo sostenibile", University Federico II, Italy.
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7
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Stoffel NU, Zimmermann MB, Cepeda-Lopez AC, Cervantes-Gracia K, Llanas-Cornejo D, Zeder C, Tuntipopipat S, Moungmaithong S, Densupsoontorn N, Quack Loetscher K, Gowachirapant S, Herter-Aeberli I. Maternal iron kinetics and maternal-fetal iron transfer in normal-weight and overweight pregnancy. Am J Clin Nutr 2021; 115:1166-1179. [PMID: 34910118 PMCID: PMC8970997 DOI: 10.1093/ajcn/nqab406] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 12/07/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Inflammation during pregnancy may aggravate iron deficiency (ID) by increasing serum hepcidin and reducing iron absorption. This could restrict iron transfer to the fetus, increasing risk of infant ID and its adverse effects. OBJECTIVES We aimed to assess whether iron bioavailability and/or iron transfer to the fetus is impaired in overweight/obese (OW) pregnant women with adiposity-related inflammation, compared with normal-weight (NW) pregnant women. METHODS In this prospective study, we followed NW (n = 43) and OW (n = 40) pregnant women who were receiving iron supplements from the 14th week of gestation to term and followed their infants to age 6 mo. We administered 57Fe and 58Fe in test meals mid-second and mid-third trimester, and measured tracer kinetics throughout pregnancy and infancy. RESULTS In total, 38 NW and 36 OW women completed the study to pregnancy week 36, whereas 30 NW and 27 OW mother-infant pairs completed the study to 6 mo postpartum. Both groups had comparable iron status, hemoglobin, and serum hepcidin throughout pregnancy. Compared with the NW, the OW pregnant women had 1) 43% lower fractional iron absorption (FIA) in the third trimester (P = 0.033) with median [IQR] FIA of 23.9% [11.4%-35.7%] and 13.5% [10.8%-19.5%], respectively; and 2) 17% lower maternal-fetal iron transfer from the first tracer (P = 0.051) with median [IQR] maternal-fetal iron transfer of 4.8% [4.2%-5.4%] and 4.0% [3.6%-4.6%], respectively. Compared with the infants born to NW women, infants born to OW women had lower body iron stores (BIS) with median [IQR] 7.7 [6.3-8.8] and 6.6 [4.6-9.2] mg/kg body weight at age 6 mo, respectively (P = 0.024). Prepregnancy BMI was a negative predictor of maternal-fetal iron transfer (β = -0.339, SE = 0.144, P = 0.025) and infant BIS (β = -0.237, SE = 0.026, P = 0.001). CONCLUSIONS Compared with NW, OW pregnant women failed to upregulate iron absorption in late pregnancy, transferred less iron to their fetus, and their infants had lower BIS. These impairments were associated with inflammation independently of serum hepcidin.This trial was registered at clinicaltrials.gov as NCT02747316.
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Affiliation(s)
- Nicole U Stoffel
- Laboratory of Human Nutrition, Department of Health Science and Technology, ETH Zurich, Zürich, Switzerland
| | - Michael B Zimmermann
- Laboratory of Human Nutrition, Department of Health Science and Technology, ETH Zurich, Zürich, Switzerland,Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, University of Oxford and John Radcliffe Hospital, Oxford, United Kingdom
| | | | - Karla Cervantes-Gracia
- Department of Basic Sciences, School of Medicine, Universidad de Monterrey, Monterrey, Mexico
| | - Daniel Llanas-Cornejo
- Department of Basic Sciences, School of Medicine, Universidad de Monterrey, Monterrey, Mexico
| | - Christophe Zeder
- Laboratory of Human Nutrition, Department of Health Science and Technology, ETH Zurich, Zürich, Switzerland
| | | | | | | | | | | | - Isabelle Herter-Aeberli
- Laboratory of Human Nutrition, Department of Health Science and Technology, ETH Zurich, Zürich, Switzerland
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Iron deficiency during the first 1000 days of life: are we doing enough to protect the developing brain? Proc Nutr Soc 2021; 81:108-118. [PMID: 34548120 DOI: 10.1017/s0029665121002858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Iron is essential for the functioning of all cells and organs, most critically for the developing brain in the fundamental neuronal processes of myelination, energy and neurotransmitter metabolism. Iron deficiency, especially in the first 1000 days of life, can result in long-lasting, irreversible deficits in cognition, motor function and behaviour. Pregnant women, infants and young children are most vulnerable to iron deficiency, due to their high requirements to support growth and development, coupled with a frequently inadequate dietary supply. An unrecognised problem is that even if iron intake is adequate, common pregnancy-related and lifestyle factors can affect maternal-fetal iron supply in utero, resulting in an increased risk of deficiency for the mother and her fetus. Although preterm birth, gestational diabetes mellitus and intrauterine growth restriction are known risk factors, more recent evidence suggests that maternal obesity and delivery by caesarean section further increase the risk of iron deficiency in the newborn infant, which can persist into early childhood. Despite the considerable threat that early-life iron deficiency poses to long-term neurological development, life chances and a country's overall social and economic progress, strategies to tackle the issue are non-existent, too limited or totally inappropriate. Prevention strategies, focused on improving the health and nutritional status of women of reproductive age are required. Delayed cord clamping should be considered a priority. Better screening strategies to enable the early detection of iron deficiency during pregnancy and early-life should be prioritised, with intervention strategies to protect maternal health and the developing brain.
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The effect of prepregnancy body mass index on maternal micronutrient status: a meta-analysis. Sci Rep 2021; 11:18100. [PMID: 34518612 PMCID: PMC8437962 DOI: 10.1038/s41598-021-97635-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/09/2021] [Indexed: 12/17/2022] Open
Abstract
The relationship between prepregnancy body mass index (BMI) and maternal micronutrient status is inconsistent and has not received sufficient attention. This meta-analysis aimed to evaluate the effect of prepregnancy BMI on micronutrient levels in pregnant women. PubMed, Embase, Web of Science, and the Cochrane Library were searched for articles that contained information on micronutrient levels and prepregnancy BMI. A random-effects model was used to determine the association between prepregnancy BMI and maternal micronutrient status. Sixty-one eligible articles were eventually included, with 83,554 participants. Vitamin B12, folate, vitamin D, iron and ferritin were the main micronutrients evaluated in our meta-analysis. Prepregnancy obesity and overweight may lead to an increased risk of micronutrient deficiency, including vitamin B12, folate and vitamin D deficiency, while prepregnancy obesity or overweight may have no significant association with ferritin deficiency. Additionally, the results of the dose-response analyses demonstrated a possible significant inverse correlation between prepregnancy BMI and levels of micronutrient, except for iron and ferritin. Compared with women with normal weight, women who were overweight or obese prepregnancy have lower micronutrient concentrations and are more likely to exhibit micronutrient deficiency during pregnancy, which is harmful to both mothers and neonates.
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10
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Tussing-Humphreys L, LaBomascus B, O'Brien K, Nemeth E, Sangkhae V, Steffen AD, Castellanos K, DeMartelly V, Ruchob R, Welke L, Hemphill NO, Pezley L, McLeod A, Hirsch B, Elam G, Ferrans CE, Koenig MD. Prepregnancy Obesity Does Not Impact Placental Iron Trafficking. J Nutr 2021; 151:2646-2654. [PMID: 34132349 PMCID: PMC8417928 DOI: 10.1093/jn/nxab191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/06/2021] [Accepted: 05/20/2021] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Iron is critical for fetal development. Neonates of obese women may be at risk for poor iron status at birth as a result of maternal inflammation-driven overexpression of hepcidin. OBJECTIVES The objective of this study was to determine differences in placental transfer of oral iron (57Fe) and expression of placental transferrin receptor 1 (TFR1) and ferroportin (FPN) mRNA and protein and their association with maternal and neonatal iron-related parameters, including maternal hepcidin, among women with and without prepregnancy (PP) obesity. METHODS 57Fe ingested during the third trimester of pregnancy was recovered in venous umbilical cord blood among 20 PP obese [BMI (in kg/m2): 30.5-43.9] and 22 nonobese (BMI: 18.5-29.0) women aged 17-39 y. Placental TFR1 and FPN mRNA and protein expression were quantified via qPCR and Western blot. Maternal and neonatal markers of iron status and regulation, as well as inflammation, were measured. Descriptive and inferential statistical tests (e.g., Student t test, Pearson correlation) were used for data analysis. RESULTS There was no difference in cord blood enrichment of 57Fe or placental mRNA or protein expression of TFR1 or FPN among the women with and without PP obesity. Maternal hepcidin was not correlated with cord blood enrichment of 57Fe or placental FPN mRNA or protein expression. Maternal log ferritin (corrected for inflammation) was inversely correlated with log percent enrichment of 57Fe in cord blood (partial r = -0.50; P < 0.01, controlled for marital status) and protein expression of TFR1 (r = -0.43; P = 0.01). CONCLUSIONS Placental iron trafficking did not differ among women with and without PP obesity. Findings reinforce the importance of maternal iron stores in regulating placental iron trafficking.
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Affiliation(s)
- Lisa Tussing-Humphreys
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Kimberly O'Brien
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, USA
| | - Elizabeta Nemeth
- Center for Iron Disorders, Department of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Veena Sangkhae
- Center for Iron Disorders, Department of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Alana D Steffen
- Department of Biobehavioral Nursing Science, University of Illinois at Chicago, Chicago, IL, USA
| | - Karla Castellanos
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA
| | - Victoria DeMartelly
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA
| | | | | | | | - Lacey Pezley
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA
| | - Andrew McLeod
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Gloria Elam
- Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, IL, USA
| | - Carol Estwing Ferrans
- Department of Biobehavioral Nursing Science, University of Illinois at Chicago, Chicago, IL, USA
| | - Mary Dawn Koenig
- Department of Human Development Nursing Sciences, University of Illinois at Chicago, Chicago, IL, USA
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11
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Jones AD, Shi Z, Lambrecht NJ, Jiang Y, Wang J, Burmeister M, Li M, Lozoff B. Maternal Overweight and Obesity during Pregnancy Are Associated with Neonatal, but Not Maternal, Hepcidin Concentrations. J Nutr 2021; 151:2296-2304. [PMID: 33979838 PMCID: PMC8349130 DOI: 10.1093/jn/nxab133] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/31/2021] [Accepted: 04/16/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Overweight or obesity among pregnant women may compromise maternal and neonatal iron status by upregulating hepcidin. OBJECTIVES This study determined the association of 1) maternal and neonatal iron status with maternal and neonatal hepcidin concentrations, and 2) maternal prepregnancy weight status with maternal and neonatal hepcidin concentrations. METHODS We examined hematologic data from 405 pregnant women and their infants from the placebo treatment group of a pregnancy iron supplementation trial in rural China. We measured hepcidin, serum ferritin (SF), soluble transferrin receptor (sTfR), and high-sensitivity C-reactive protein in maternal blood samples at mid-pregnancy and in cord blood at delivery. We used regression analysis to examine the association of maternal prepregnancy overweight or obese status with maternal hepcidin concentration in mid-pregnancy and cord hepcidin concentrations. We also used path analysis to examine mediation of the association of maternal prepregnancy overweight or obese status with maternal iron status by maternal hepcidin, as well as with neonatal hepcidin by neonatal iron status. RESULTS Maternal iron status was positively correlated with maternal hepcidin at mid-pregnancy (SF: r = 0.63, P < 0.001; sTfR: r = -0.37, P < 0.001). Neonatal iron status was also positively correlated with cord hepcidin (SF: r = 0.61, P < 0.001; sTfR: r = -0.39, P < 0.001). In multiple linear regression models, maternal prepregnancy overweight or obese status was not associated with maternal hepcidin at mid-pregnancy but was associated with lower cord hepcidin (coefficient = -0.21, P = 0.004). Using path analysis, we observed a significant indirect effect of maternal prepregnancy overweight or obese status on cord hepcidin, mediated by neonatal iron status. CONCLUSIONS In both pregnant women and neonates, hepcidin was responsive to iron status. Maternal prepregnancy overweight status, with or without including obese women, was associated with lower cord blood hepcidin, likely driven by lower iron status among the neonates of these mothers.
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Affiliation(s)
- Andrew D Jones
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Zhen Shi
- Peking University First Hospital, Beijing, China
- Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Nathalie J Lambrecht
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Yaping Jiang
- Peking University First Hospital, Beijing, China
| | - Jingmin Wang
- Peking University First Hospital, Beijing, China
| | - Margit Burmeister
- Department of Computational Medicine & Bioinformatics, Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Ming Li
- Peking University First Hospital, Beijing, China
| | - Betsy Lozoff
- Department of Pediatrics, Medical School, University of Michigan, Ann Arbor, MI, USA
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12
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Iron, iodine and vitamin D deficiencies during pregnancy: epidemiology, risk factors and developmental impacts. Proc Nutr Soc 2021; 80:290-302. [PMID: 33988109 DOI: 10.1017/s0029665121001944] [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] [Indexed: 02/07/2023]
Abstract
Micronutrient deficiency persists throughout the world, and although the burden is higher in low-resource settings, it is also prevalent in wealthy countries, a phenomenon termed 'hidden hunger'. Due to their high requirements for vitamins and minerals relative to their energy intake, young women and children are particularly vulnerable to hidden hunger. As they share several risk factors and impact on overlapping outcomes, we consider how deficiency of iron, iodine and vitamin D can have profound impacts on perinatal health and infant development. We review the epidemiology of these micronutrient deficiencies during pregnancy, including social, environmental and dietary risk factors. We identify the main challenges in defining nutritional status of these nutrients using validated diagnostic criteria linked with meaningful clinical outcomes. Public health strategies are urgently required to improve the overall health and nutritional status of women of reproductive age. Obesity prevention and early detection of malnutrition with standardised screening methods would detect pregnant women at increased risk of iron deficiency. Development of sensitive, individual biomarkers of iodine status is required to protect maternal health and fetal/infant brain development. Risk assessments of vitamin D requirements during pregnancy need to be revisited from the perspective of fetal and neonatal requirements. International consensus on standardised approaches to micronutrient assessment, analysis and reporting as well as sensitive, clinically validated infant and child neuro-behavioural outcomes will enable progression of useful observational and intervention studies.
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13
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Wawer AA, Hodyl NA, Fairweather-Tait S, Froessler B. Are Pregnant Women Who Are Living with Overweight or Obesity at Greater Risk of Developing Iron Deficiency/Anaemia? Nutrients 2021; 13:1572. [PMID: 34067098 PMCID: PMC8151407 DOI: 10.3390/nu13051572] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 12/14/2022] Open
Abstract
Low-grade inflammation is often present in people living with obesity. Inflammation can impact iron uptake and metabolism through elevation of hepcidin levels. Obesity is a major public health issue globally, with pregnant women often affected by the condition. Maternal obesity is associated with increased pregnancy risks including iron deficiency (ID) and iron-deficiency anaemia (IDA)-conditions already highly prevalent in pregnant women and their newborns. This comprehensive review assesses whether the inflammatory state induced by obesity could contribute to an increased incidence of ID/IDA in pregnant women and their children. We discuss the challenges in accurate measurement of iron status in the presence of inflammation, and available iron repletion strategies and their effectiveness in pregnant women living with obesity. We suggest that pre-pregnancy obesity and overweight/obese pregnancies carry a greater risk of ID/IDA for the mother during pregnancy and postpartum period, as well as for the baby. We propose iron status and weight gain during pregnancy should be monitored more closely in women who are living with overweight or obesity.
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Affiliation(s)
- Anna A. Wawer
- Department of Anaesthesia, Lyell McEwin Hospital, Elizabeth Vale, SA 5112, Australia;
- Faculty of Health and Medical Sciences, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia;
| | - Nicolette A. Hodyl
- Faculty of Health and Medical Sciences, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia;
| | - Susan Fairweather-Tait
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK;
| | - Bernd Froessler
- Department of Anaesthesia, Lyell McEwin Hospital, Elizabeth Vale, SA 5112, Australia;
- Discipline of Acute Care Medicine, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
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14
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Effect of Maternal Nutritional Status and Mode of Delivery on Zinc and Iron Stores at Birth. Nutrients 2021; 13:nu13030860. [PMID: 33808021 PMCID: PMC8001279 DOI: 10.3390/nu13030860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
Zinc and iron deficiencies among infants aged under 6 months may be related with nutrient store at birth. This study aimed to investigate the association between zinc and iron stores at birth with maternal nutritional status and intakes during pregnancy. 117 pregnant women were enrolled at the end of second trimester and followed until delivery. Clinical data during pregnancy, including pre-pregnancy body mass index (BMI) and at parturition were collected from medical record. Zinc and iron intakes were estimated from a food frequency questionnaire. Serum zinc and ferritin were determined in maternal blood at enrollment and cord blood. Mean cord blood zinc and ferritin were 10.8 ± 2.6 µmol/L and 176 ± 75.6 µg/L, respectively. Cord blood zinc was associated with pre-pregnancy BMI (adj. ß 0.150; p = 0.023) and serum zinc (adj. ß 0.115; p = 0.023). Cord blood ferritin was associated with pre-pregnancy BMI (adj. ß -5.231; p = 0.009). Cord blood zinc and ferritin were significantly higher among those having vaginal delivery compared to cesarean delivery (adj. ß 1.376; p = 0.007 and 32.959; p = 0.028, respectively). Maternal nutritional status and mode of delivery were significantly associated with zinc and iron stores at birth. Nutrition during preconception and pregnancy should be ensured to build adequate stores of nutrients for infants.
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15
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Farias PM, Marcelino G, Santana LF, de Almeida EB, Guimarães RDCA, Pott A, Hiane PA, Freitas KDC. Minerals in Pregnancy and Their Impact on Child Growth and Development. Molecules 2020; 25:molecules25235630. [PMID: 33265961 PMCID: PMC7730771 DOI: 10.3390/molecules25235630] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/15/2020] [Accepted: 10/21/2020] [Indexed: 12/11/2022] Open
Abstract
During pregnancy, women undergo metabolic and physiological changes, and their needs are higher, to maintain growth and development of the fetus. If the nutritional status of the expectant mother is not satisfactory, some maternal and neonatal complications can occur. In the second and third trimester of pregnancy, there is a reserve of nutrients in the fetus that can be utilized after birth; thereby, children present an accelerated growth in the first years of life, which is a proven response to the available nutrition pattern. However, if such a pattern is insufficient, there will be deficits during development, including brain function. Therefore, despite many recent published works about gestational nutrition, uncertainties still remain on the mechanisms of absorption, distribution, and excretion of micronutrients. Further elucidation is needed to better understand the impacts caused either by deficiency or excess of some micronutrients. Thus, to illustrate the contributions of minerals during prenatal development and in children, iodine, selenium, iron, zinc, calcium, and magnesium were selected. Our study sought to review the consequences related to gestational deficiency of the referred minerals and their impact on growth and development in children born from mothers with such deficiencies
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Affiliation(s)
- Patricia Miranda Farias
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
| | - Gabriela Marcelino
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
| | - Lidiani Figueiredo Santana
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
| | - Eliane Borges de Almeida
- Biologist, Hematology Laboratory, State Secretariat of Health of Mato Grosso do Sul, Campo Grande 79084-180, Mato Grosso do Sul, Brazil;
| | - Rita de Cássia Avellaneda Guimarães
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
| | - Arnildo Pott
- Graduate Program in Biotechnology and Biodiversity in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil;
| | - Priscila Aiko Hiane
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
| | - Karine de Cássia Freitas
- Graduate Program in Health and Development in the Central-West Region of Brazil, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil; (P.M.F.); (G.M.); (L.F.S.); (R.d.C.A.G.); (P.A.H.)
- Correspondence: ; Tel.: +55-67-3345-7416
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16
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Sangkhae V, Fisher AL, Chua KJ, Ruchala P, Ganz T, Nemeth E. Maternal hepcidin determines embryo iron homeostasis in mice. Blood 2020; 136:2206-2216. [PMID: 32584957 PMCID: PMC7645983 DOI: 10.1182/blood.2020005745] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/07/2020] [Indexed: 12/21/2022] Open
Abstract
Iron disorders are associated with adverse pregnancy outcomes, yet iron homeostatic mechanisms during pregnancy are poorly understood. In humans and rodents, the iron-regulatory hormone hepcidin is profoundly decreased in pregnant mothers, which is thought to ensure adequate iron availability for transfer across placenta. However, the fetal liver also produces hepcidin, which may regulate fetal iron endowment by controlling placental iron export. To determine the relative contribution of maternal vs embryo hepcidin to the control of embryo iron endowment in iron-sufficient or iron-overloaded mice, we generated combinations of mothers and embryos that had or lacked hepcidin. We found that maternal, but not embryonic, hepcidin determined embryo and placental iron endowment in a healthy pregnancy. We further determined that inflammation can counteract pregnancy-dependent suppression of maternal hepcidin. To establish how essential maternal hepcidin suppression is for embryo iron homeostasis, we mimicked the range of maternal hepcidin activity by administering a hepcidin peptide mimetic to pregnant mice. This also allowed us to determine the effect of isolated maternal hepcidin excess on pregnancy, in the absence of other confounding effects of inflammation. Higher doses of hepcidin agonist caused maternal iron restriction and anemia, lower placenta and embryo weight, embryo anemia, and increased embryo mortality. Low agonist doses did not cause maternal anemia but still adversely affected the embryo, causing anemia, tissue iron deficiency (including in the brain), and decreased weight. Our studies demonstrate that suppression of maternal hepcidin during pregnancy is essential for maternal and embryo iron homeostasis and health.
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Affiliation(s)
- Veena Sangkhae
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
| | - Allison L Fisher
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
- Molecular, Cellular & Integrative Physiology Graduate Program, University of California, Los Angeles, Los Angeles, CA
| | - Kristine J Chua
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
| | - Piotr Ruchala
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
| | - Tomas Ganz
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
| | - Elizabeta Nemeth
- Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine and
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17
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Baseline iron and low-grade inflammation modulate the effectiveness of iron supplementation: evidence from follow-up of pregnant Sri Lankan women. Eur J Nutr 2020; 60:1101-1109. [PMID: 32613329 DOI: 10.1007/s00394-020-02320-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 06/25/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE We evaluated the effectiveness of iron supplementation in relation to baseline iron and inflammatory status of pregnant women and their offspring in Sri Lanka. METHODS Apparently healthy women aged 18-36 years at < 12 weeks of gestation prior to receiving any supplementation were randomly recruited at the antenatal clinics. They received 60 mg of elemental iron in combined iron-folic acid pills from 12 weeks of gestation until delivery via the National Maternal Supplementation Programme. Serum ferritins (SF), hemoglobin and high-sensitive C-reactive protein (hs-CRP) were assessed. The women were grouped as iron sufficient-inflammation (+), iron sufficient-inflammation (-), iron deficient-inflammation (+) and iron deficient-inflammation (-) based on their baseline iron stores and low-grade inflammation (hs-CRP > 5 < 10 mg/L) at baseline and late pregnancy. RESULTS Despite supplementation, SF in the iron sufficient-inflammation (+) women reduced significantly (p = 0.037) to deficiency state (SF < 30 µg/L) at mid-pregnancy. Whereas no significant changes were noted in the SF in iron sufficient-inflammation (-) women (p > 0.05). They maintained their stores at sufficient state until delivery. The cord SF was higher (p < 0.001) in iron sufficient-inflammation (-) than the inflammation (+) women. 96.4% of the iron deficient women remained deficient until delivery regardless of their inflammatory state. Low-grade inflammation was higher (p < 0.001) in women with baseline BMI > 25 kg/m2. Whereas inflammation at late pregnancy was higher (p < 0.001) in women who gained weight in excess of the recommended, regardless of their baseline BMI. CONCLUSION Iron status prior to supplementation and low-grade inflammation associated with BMI > 25 kg/m2 and excess weight gain during pregnancy appear to modulate the effectiveness of iron supplementation.
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18
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Koenig MD, Klikuszowian E, O'Brien KO, Pauls H, Steffen A, DeMartelly V, Ruchob R, Welke L, Hemphill N, LaBomascus B, Pezley L, McLeod A, Hirsch B, Ferrans CE, Tussing-Humphreys L. Prepregnancy Obesity Is Not Associated with Iron Utilization during the Third Trimester. J Nutr 2020; 150:1397-1404. [PMID: 32221605 PMCID: PMC7269726 DOI: 10.1093/jn/nxaa065] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/09/2019] [Accepted: 02/25/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND An adequate maternal iron supply is crucial for maternal red blood cell (RBC) expansion, placental and fetal growth, and fetal brain development. Obese women may be at risk for poor iron status in pregnancy due to proinflammatory-driven overexpression of hepcidin leading to decreased iron bioavailability. OBJECTIVE The objective of this study was to determine the impact of prepregnancy (PP) obesity on third-trimester maternal iron utilization. DESIGN Using the stable isotope 57Fe, we measured iron utilization in the third trimester in PP obese [BMI (in kg/m2): ≥30] and nonobese (BMI: 18.5-29.9) women. We also assessed iron status, hepcidin, inflammation, erythropoietin, dietary iron intake, and gestational weight gain. Descriptive and inferential statistical tests (e.g., Student t test, Pearson correlation) were used for data analysis. RESULTS Fifty pregnant women (21 PP obese, 29 PP nonobese) were included. Mean age was 27.6 ± 6.8 y and mean gestational age at time of 57Fe administration was 32.7 ± 0.7 wk. Anemia (hemoglobin <11 g/dL for non-black and <10.2 g/dL for black women) affected 38% of women (43% PP obese compared with 35% PP nonobese; P = 0.55). Women with PP obesity had significantly higher C-reactive protein (8.5 compared with 3.4 mg/L, P = 0.0007) and total body iron corrected for inflammation (6.0 compared with 4.3 mg/kg, P = 0.04) compared with the nonobese women. There was no difference in serum hepcidin or iron utilization between the PP BMI groups. CONCLUSION This is the first study to assess the impact of PP obesity on maternal iron utilization. We found no difference in iron utilization in the third trimester of pregnancy in women with and without PP obesity. Despite higher frequency of anemia, women with PP obesity had less depleted body iron stores, suggesting some degree of iron sequestration. This finding should be followed up and extended to understand effects on fetal iron bioavailability.
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Affiliation(s)
- Mary Dawn Koenig
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Elizabeth Klikuszowian
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kimberly O O'Brien
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, USA
| | - Heather Pauls
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Alana Steffen
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Victoria DeMartelly
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Rungnapa Ruchob
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lauren Welke
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Nefertiti Hemphill
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Bazil LaBomascus
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lacey Pezley
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Andrew McLeod
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Bruni Hirsch
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Carol Estwing Ferrans
- Department of Women, Children and Family Health Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lisa Tussing-Humphreys
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA,Address correspondence to LT-H (e-mail: )
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Avnon T, Anbar R, Lavie I, Ben-Mayor Bashi T, Paz Dubinsky E, Shaham S, Yogev Y. Does vegan diet influence umbilical cord vitamin B12, folate, and ferritin levels? Arch Gynecol Obstet 2020; 301:1417-1422. [PMID: 32347355 DOI: 10.1007/s00404-020-05561-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/20/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE To determine the influence of maternal diets on maternal and umbilical cord blood levels of vitamin B12, folic acid, ferritin, and hemoglobin. METHODS A prospective observational study on women who maintained the same diet for at least 3 months prior to, and throughout current pregnancy. Women were divided according to their diet. Diet questionnaires were filled in during the 3rd trimester. Blood samples for complete blood counts and levels of ferritin, vitamin B12, folate, and albumin were taken from the women prior to delivery and from the umbilical cord immediately after delivery. RESULTS The 273 enrolled women included 112 omnivores, 37 pescatarians, 64 vegetarians, and 60 vegans. There were no significant differences in the maternal B12 levels between the study groups (P = 0.426). Vegans had lower maternal ferritin levels compared to pescatarians (27 ± 17 vs 60 ± 74 ng/ml, respectively, P = 0.034), but not compared to vegetarians (P = 0.597), or omnivores (P = 1.000). There were no significant differences in the umbilical cord B12, folate, ferritin, and hemoglobin levels between the study groups. A sub-analysis that compared women who consumed multivitamins, B12 and iron supplements during pregnancy to women who did not, revealed differences in the levels of umbilical-cord B12 (1002 ± 608 vs 442 ± 151 pg/ml, respectively, P = 0.000) and maternal blood B12 (388 ± 209 vs 219 ± 95 pg/ml, respectively, P = 0.030) only among vegans, but not among omnivores. CONCLUSION Vegan diet does not change the umbilical cord levels of B12, folic acid, ferritin, and hemoglobin. Vegans who do not take any vitamin supplementation are at greater risk for B12 deficiency than omnivores.
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Affiliation(s)
- Tomer Avnon
- Department of Obstetrics and Gynecology, Lis Maternity and Women's Hospital, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, 6 Weizmann Street, 6423906, Tel-Aviv, Israel.
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Ronit Anbar
- Nutrition and Dietetic Unit, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- The Robert H Smith Faculty of Agriculture, Food and Environmental Quality Sciences, School of Nutritional Sciences, Hebrew University, Jerusalem, Israel
| | - Inbar Lavie
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Tali Ben-Mayor Bashi
- Department of Obstetrics and Gynecology, Lis Maternity and Women's Hospital, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, 6 Weizmann Street, 6423906, Tel-Aviv, Israel
| | - Efrat Paz Dubinsky
- Nutrition and Dietetic Unit, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Sivan Shaham
- Nutrition and Dietetic Unit, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Yariv Yogev
- Department of Obstetrics and Gynecology, Lis Maternity and Women's Hospital, Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, 6 Weizmann Street, 6423906, Tel-Aviv, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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Durocher J, Aguirre JD, Dzuba IG, Mirta Morales E, Carroli G, Esquivel J, Martin R, Berecoechea C, Winikoff B. High fever after sublingual administration of misoprostol for treatment of post-partum haemorrhage: a hospital-based, prospective observational study in Argentina. Trop Med Int Health 2020; 25:714-722. [PMID: 32155681 PMCID: PMC7317539 DOI: 10.1111/tmi.13389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Objective To characterise the occurrence of fever (≥38.0°C) after treatment for post‐partum haemorrhage (PPH) with sublingual misoprostol 800 mcg in Latin America, where elevated rates of misoprostol’s thermoregulatory effects and recipients’ increased susceptibility to high fever have been documented. Methods A prospective observational study in hospitals in Argentina enrolled consenting women with atonic PPH after vaginal delivery, eligible to receive misoprostol. Corporal temperature was assessed at 30, 60, 90 and 120 min post‐treatment; other effects were recorded. The incidence of high fever ≥ 40.0°C (primary outcome) was compared to the rate observed previously in Ecuador. Logistic regressions were performed to identify clinical and population‐based predictors of misoprostol‐induced fever. Results Transient shivering and fever were experienced by 75.5% (37/49) of treated participants and described as acceptable by three‐quarters of women interviewed (35/47). The high fever rate was 12.2% (6/49), [95% Confidence Interval (CI) 4.6, 24.8], compared to Ecuador’s rate following misoprostol treatment (35.6% (58/163) [95% CI 28.3, 43.5], P = 0.002). Significant predictors of misoprostol‐induced fever (model dependent) were as follows: pre‐delivery haemoglobin < 11.0g/dl, rapid placental expulsion, and higher age of the woman. No serious outcomes were reported prior to discharge. Conclusions Misoprostol to treat PPH in Argentina resulted in a significantly lower rate of high fever than in Ecuador, although both are notably higher than rates seen elsewhere. A greater understanding of misoprostol’s side effects and factors involved in their occurrence, including genetics, will help alleviate concerns. The onset of shivering may be the simplest way to know if fever can also be expected.
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Affiliation(s)
| | | | | | | | | | - Jesica Esquivel
- Hospital Materno Neonatal E.T. de Vidal, Corrientes, Argentina
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Amstad Bencaiova G, Vogt DR, Hoesli I. Serum hepcidin and iron status parameters in pregnant women and the association with adverse maternal and fetal outcomes: a study protocol for a prospective cohort study. BMJ Open 2019; 9:e032280. [PMID: 31699745 PMCID: PMC6858208 DOI: 10.1136/bmjopen-2019-032280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/13/2019] [Accepted: 09/19/2019] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION Hepcidin production is normally upregulated by iron stores, and in obesity has been shown to be overexpressed and correlated with low iron status. The increased hepcidin may restrain the iron release from the cells by affecting the expression of ferroportin, which probably associates with the development of diabetes complication. First, we investigate the difference of serum hepcidin and iron parameters between obese and non-obese pregnant women; second, we examine the correlation between serum hepcidin and adverse maternal and neonatal outcomes in pregnant women. METHODS AND ANALYSIS This is a mono-centre, prospective cohort study with a study (obese) and a control group (non-obese women). In the first trimester, 188 singleton pregnancies will be recruited. Thereof, we expect 75 with a body mass index (BMI) ≥30 kg/m2 and 113 with a BMI 18.5-30 kg/m2. Serum hepcidin, iron and haematological parameters will be measured at 11-14, 24-28, 32-36 weeks of gestation and at time of delivery. Blood pressure, weight, BMI and smoking status will be examined at all visits. We will assess the composite endpoints adverse maternal outcomes (including pre-eclampsia, gestational hypertension, gestational diabetes mellitus, haemorrhage, placenta abruption) and adverse neonatal outcomes (preterm birth, intrauterine growth restriction, preterm premature rupture of membranes, Apgar score <7 at 5 min, stillbirth, neonatal death).Recruitment has started in April 2019. ETHICS AND DISSEMINATION This study received ethical approval from the ethics committee in Basel. The results of the study will be published in a peer-reviewed journal, and presented at national scientific conferences. TRIAL REGISTRATION NUMBER NCT03792464.
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Affiliation(s)
| | | | - Irene Hoesli
- Department of Obtetrics and Antenatal Care, University Hospital Basel, Basel, Switzerland
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22
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McCarthy EK, Kiely ME. The neonatal period: A missed opportunity for the prevention of iron deficiency and its associated neurological consequences? NUTR BULL 2019. [DOI: 10.1111/nbu.12407] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. K. McCarthy
- Cork Centre for Vitamin D and Nutrition Research School of Food and Nutritional Sciences University College Cork and INFANT Research Centre Cork Ireland
| | - M. E. Kiely
- Cork Centre for Vitamin D and Nutrition Research School of Food and Nutritional Sciences University College Cork and INFANT Research Centre Cork Ireland
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23
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Morales-Ancajima VC, Tapia V, Vu BN, Liu Y, Alarcón-Yaquetto DE, Gonzales GF. Increased Outdoor PM 2.5 Concentration Is Associated with Moderate/Severe Anemia in Children Aged 6-59 Months in Lima, Peru. JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH 2019; 2019:6127845. [PMID: 31428166 PMCID: PMC6681625 DOI: 10.1155/2019/6127845] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/27/2019] [Accepted: 07/08/2019] [Indexed: 12/25/2022]
Abstract
Anemia affects 1.62 billion people worldwide. Although iron deficiency is the main cause of anemia, several other factors may explain its high prevalence. In this study, we sought to analyze the association between outdoor particulate matter PM2.5 levels with anemia prevalence in children aged 6-59 months residing in Lima, Peru (n = 139,368), one of the cities with the worst air pollution in Latin America. The study period was from 2012 to 2016. Anemia was defined according to the World Health Organization (Hb < 11 g/dL). PM2.5 values were estimated by a mathematical model that combined data observed from monitors, with satellite and meteorological data. PM2.5 was analyzed by quintiles. Multiple linear and logistic regressions were used to estimate the associations between hemoglobin concentration (beta) and anemia (odds ratio) with PM2.5, after adjusting by covariates. Prevalence of anemia was 39.6% (95% confidence interval (CI): 39.3-39.9). Mild anemia was observed in 30.8% of children and moderate/severe in 8.84% of children. Anemic children compared with nonanemic children are mainly males, have low body weight, higher rate of stunting, and live in an environment with high PM2.5 concentration. A slight decrease in hemoglobin (4Q B: -0.03, 95% CI: -0.05 to -0.02; 5Q B: -0.04, 95% CI: -0.06 to -0.01) and an increase in the probability of moderate/severe anemia (4Q OR: 1.18, 95% CI: 1.10-1.27; 5Q OR: 1.18, 95% CI: 1.08-1.29) were observed with increased exposure to PM2.5. We conclude that outdoor PM2.5 levels were significantly associated with decreased hemoglobin values and an increase in prevalence of moderate/severe anemia in children under 5 years old.
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Affiliation(s)
- Valeria C. Morales-Ancajima
- Endocrinology and Reproduction Unit, Research and Development Laboratories (LID), Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Vilma Tapia
- Endocrinology and Reproduction Unit, Research and Development Laboratories (LID), Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Biological and Physiological Sciences, Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Bryan N. Vu
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Yang Liu
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Dulce E. Alarcón-Yaquetto
- Endocrinology and Reproduction Unit, Research and Development Laboratories (LID), Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Biological and Physiological Sciences, Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, Lima, Peru
- Biomedical Informatics in Global Health Unit, School of Public Health, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Gustavo F. Gonzales
- Endocrinology and Reproduction Unit, Research and Development Laboratories (LID), Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Biological and Physiological Sciences, Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
- Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, Lima, Peru
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24
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Obesity Is Associated with Changes in Iron Nutrition Status and Its Homeostatic Regulation in Pregnancy. Nutrients 2019; 11:nu11030693. [PMID: 30909605 PMCID: PMC6471435 DOI: 10.3390/nu11030693] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 03/07/2019] [Accepted: 03/20/2019] [Indexed: 01/07/2023] Open
Abstract
The influence of obesity on maternal iron homeostasis and nutrition status during pregnancy remains only partially clarified. Our study objectives were (1) to describe how obesity influences broad iron nutrition spectrum biomarkers such as available or circulating iron (serum transferrin receptor (sTfr) and serum iron), iron reserves (ferritin), and functional iron (hemoglobin); and (2) to depict the regulating role of hepcidin. The above was carried out while considering influential factors such as initial iron nutrition status, iron intake, and the presence of inflammation. Ninety three non-anemic pregnant adult women were included, 40 with obesity (Ob) and 53 with adequate weight (AW); all took ≈30 mg/day of supplementary iron. Information on iron intake and blood samples were obtained at gestational weeks 13, 20, 27, and 35. A series of repeated measure analyses were performed using General Linear Models to discern the effect of obesity on each iron indicator; iron intake, hepcidin, and C-reactive protein were successively introduced as covariates. Available and circulating iron was lower in obese women: sTfr was higher (p = 0.07) and serum iron was lower (p = 0.01); and ferritin and hemoglobin were not different between groups. Hepcidin was higher in the Ob group (p = 0.01) and was a significant predictor variable for all biomarkers. Obesity during pregnancy dysregulates iron homeostasis, resembling "obesity hypoferremia".
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