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Xu X, Lyu J, Long P, Liu K, Wang H, Wang X, Yin Y, Yang H, Zhang X, Guo H, He M, Wu T, Yuan Y. Associations of multiple plasma metals with osteoporosis: findings from the Dongfeng-Tongji cohort. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:120903-120914. [PMID: 37945958 DOI: 10.1007/s11356-023-30816-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/29/2023] [Indexed: 11/12/2023]
Abstract
With the aging population, osteoporosis has become a more prevalent public health issue. Existing researches have indicated significant relations of single metal exposure with osteoporosis (e.g., lead, copper, and zinc), whereas the evidence regarding the joint association of metal mixtures with osteoporosis remain limited and inconclusive. A total of 4924 participants from the Dongfeng-Tongji cohort were included in the present study. Plasma levels of 23 metals were determined by inductively coupled plasma mass spectrometry, and the presence of osteoporosis was defined as a bone mineral density T-score ≤ - 2.5. We applied stepwise regression, plasma metal score, and quantile g-computation model to evaluate the association between plasma metal mixtures and osteoporosis risk. Of the 4924 participants, the prevalence of osteoporosis was 10.9% (N = 265) in males and 27.5% (N = 684) in females. In the multiple-metals model, arsenic was positively associated with osteoporosis in males, while zinc was positively associated with osteoporosis in females. Comparing extreme quartiles, the multivariate-adjusted ORs of osteoporosis were 2.20 (95% CI, 1.29, 3.79; P-trend = 0.006) for arsenic in males and 2.16 (95% CI, 1.44, 3.23; P-trend < 0.001) for zinc in females. The plasma metal score was significantly and positively associated with a higher risk of osteoporosis, with ORs (95% CI) comparing extreme quartiles were 5.00 (95% CI, 3.36, 7.65; P-trend < 0.001) in males and 1.76 (95% CI, 1.35, 2.29; P-trend < 0.001) in females. Furthermore, the results of quantile g-computation revealed a consistent positive trend of metal mixtures with risk of osteoporosis and suggested the dominant role of arsenic in males and zinc in females, respectively. Our findings highlighted the importance of controlling metal mixtures exposure for the prevention of osteoporosis in the middle-aged and elder population. Further prospective studies in larger populations are warranted to confirm our findings.
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Affiliation(s)
- Xuedan Xu
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Junrui Lyu
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Pinpin Long
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Kang Liu
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
- School of Public Health, Guangzhou Medical University, Guangzhou, 511436, China
| | - Hao Wang
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xi Wang
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yu Yin
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Handong Yang
- Department of Cardiovascular Diseases, Dongfeng Central Hospital, Hubei University of Medicine, Shiyan, 442008, China
| | - Xiaomin Zhang
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Huan Guo
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Meian He
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Tangchun Wu
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yu Yuan
- Department of Occupational and Environmental Health, Key Laboratory of Environment and Health, Ministry of Education and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Rak K, Styczyńska M, Godyla-Jabłoński M, Bronkowska M. Some Immune Parameters of Term Newborns at Birth Are Associated with the Concentration of Iron, Copper and Magnesium in Maternal Serum. Nutrients 2023; 15:nu15081908. [PMID: 37111127 PMCID: PMC10141145 DOI: 10.3390/nu15081908] [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: 03/03/2023] [Revised: 04/06/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
The nutritional status of pregnant women is considered to affect fetal development and the health condition of newborns, including their immune system. We investigated the relationship between the concentrations of magnesium (Mg), calcium (Ca), zinc (Zn), iron (Fe) and copper (Cu) in maternal serum (MS) and the concentrations of IgG antibodies and antineutrophil cytoplasmatic auto-antibodies against lactoferrin (Lf-ANCA) in umbilical cord serum (UCS). IgG was considered as a promoter of immunity, and Lf-ANCA as an inhibitor. The examined group consisted of 98 pregnant women and their healthy term newborn children. The concentrations of mineral elements were measured by FAAS/FAES, while the concentrations of antibodies were determined by ELISA. Excessive MS Fe and insufficient MS Cu were related to insufficient UCS IgG and excessive UCS Lf-ANCA. The correlation analysis showed confirming results. Adequate UCS IgG and Lf-ANCA were related to MS Mg at the strictly lower limit of the reference values. The results obtained seem to suggest that an excess of Fe and a deficiency of Cu in pregnancy may adversely affect some immune parameters of newborns. Reference values for MS Mg are likely to require reconsideration. It would be advisable to monitor the nutritional status of pregnant women with minerals in order to support the immune capacity of newborns.
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Affiliation(s)
- Karolina Rak
- Department of Human Nutrition, Faculty of Biotechnology and Food Science, Wroclaw University of Environmental and Life Sciences, 51-630 Wrocław, Poland
| | - Marzena Styczyńska
- Department of Human Nutrition, Faculty of Biotechnology and Food Science, Wroclaw University of Environmental and Life Sciences, 51-630 Wrocław, Poland
| | - Michaela Godyla-Jabłoński
- Department of Human Nutrition, Faculty of Biotechnology and Food Science, Wroclaw University of Environmental and Life Sciences, 51-630 Wrocław, Poland
| | - Monika Bronkowska
- Institute of Health Sciences, Collegium Salutis Humanae, University of Opole, 45-060 Opole, Poland
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Oyagbemi AA, Ajibade TO, Aboua YG, Gbadamosi IT, Adedapo ADA, Aro AO, Adejumobi OA, Thamahane-Katengua E, Omobowale TO, Falayi OO, Oyagbemi TO, Ogunpolu BS, Hassan FO, Ogunmiluyi IO, Ola-Davies OE, Saba AB, Adedapo AA, Nkadimeng SM, McGaw LJ, Kayoka-Kabongo PN, Oguntibeju OO, Yakubu MA. Potential health benefits of zinc supplementation for the management of COVID-19 pandemic. J Food Biochem 2021; 45:e13604. [PMID: 33458853 PMCID: PMC7995057 DOI: 10.1111/jfbc.13604] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/05/2020] [Accepted: 12/17/2020] [Indexed: 02/07/2023]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the etiological agent for the Coronavirus Disease 2019 (COVID-19). The COVID-19 pandemic has created unimaginable and unprecedented global health crisis. Since the outbreak of COVID-19, millions of dollars have been spent, hospitalization overstretched with increasing morbidity and mortality. All these have resulted in unprecedented global economic catastrophe. Several drugs and vaccines are currently being evaluated, tested, and administered in the frantic efforts to stem the dire consequences of COVID-19 with varying degrees of successes. Zinc possesses potential health benefits against COVID-19 pandemic by improving immune response, minimizing infection and inflammation, preventing lung injury, inhibiting viral replication through the interference of the viral genome transcription, protein translation, attachment, and host infectivity. However, this review focuses on the various mechanisms of action of zinc and its supplementation as adjuvant for vaccines an effective therapeutic regimen in the management of the ravaging COVID-19 pandemic. PRACTICAL APPLICATIONS: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the etiological agent for the Coronavirus Disease 2019 (COVID-19), has brought unprecedented untold hardship to both developing and developed countries. The global race for vaccine development against COVID-19 continues with success in sight with attendant increasing hospitalization, morbidity, and mortality. Available drugs with anti-inflammatory actions have become alternative to stem the tide of COVID-19 with attendant global financial crises. However, Zinc is known to modulate several physiological functions including intracellular signaling, enzyme function, gustation, and olfaction, as well as reproductive, skeletal, neuronal, and cardiovascular systems. Hence, achieving a significant therapeutic approach against COVID-19 could imply the use of zinc as a supplement together with available drugs and vaccines waiting for emergency authorization to win the battle of COVID-19. Together, it becomes innovative and creative to supplement zinc with currently available drugs and vaccines.
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Affiliation(s)
- Ademola Adetokunbo Oyagbemi
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Temitayo Olabisi Ajibade
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Yapo Guillaume Aboua
- Department of Health Sciences, Faculty of Health and Applied Sciences, Namibia University of Science and Technology, Windhoek, Namibia
| | | | | | - Abimbola Obemisola Aro
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Pretoria, South Africa
| | - Olumuyiwa Abiola Adejumobi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Emma Thamahane-Katengua
- Department of Health Information Management, Faculty of Health and Education, Botho University, Gaborone, Botswana
| | - Temidayo Olutayo Omobowale
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olufunke Olubunmi Falayi
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Taiwo Olaide Oyagbemi
- Department of Veterinary Parasitology and Entomology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Blessing Seun Ogunpolu
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Fasilat Oluwakemi Hassan
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Iyanuoluwa Omolola Ogunmiluyi
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olufunke Eunice Ola-Davies
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Adebowale Benard Saba
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Adeolu Alex Adedapo
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Sanah Malomile Nkadimeng
- Phytomedicine Programme, Department of Paraclinical Science, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Lyndy Joy McGaw
- Phytomedicine Programme, Department of Paraclinical Science, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Prudence Ngalula Kayoka-Kabongo
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Pretoria, South Africa
| | - Oluwafemi Omoniyi Oguntibeju
- Phytomedicine and Phytochemistry Group, Department of Biomedical Sciences, Faculty of Health and Wellness Sciences, Oxidative Stress Research Centre, Cape Peninsula University of Technology, Bellville, South Africa
| | - Momoh Audu Yakubu
- Vascular Biology Unit, Department of Environmental & Interdisciplinary Sciences, College of Science, Engineering & Technology, Center for Cardiovascular Diseases, Texas Southern University, Houston, TX, USA
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4
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Alizadeh F, Davoodian N, Kazemi H, Ghasemi-Kasman M, Shaerzadeh F. Prenatal zinc supplementation attenuates lipopolysaccharide-induced behavioral impairments in maternal immune activation model. Behav Brain Res 2019; 377:112247. [PMID: 31545978 DOI: 10.1016/j.bbr.2019.112247] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/05/2019] [Accepted: 09/16/2019] [Indexed: 11/16/2022]
Abstract
Maternal infection during pregnancy is considered a key risk factor for developing schizophrenia in offspring. There is evidence that maternal exposure to infectious agents is associated with fetal zinc deficiency. Due to the essential role of zinc in brain function and development, in the present study, we activated maternal immune system using lipopolysaccharide (LPS) as a model of schizophrenia to examine whether zinc supplementation throughout pregnancy can reverse LPS-induced deleterious effects. To test the hypothesis, pregnant rats were treated with intraperitoneal injection of either saline or LPS (0.5 mg/kg) at gestational day 15 and 16, and zinc supplementation (30 mg/kg) was administered throughout pregnancy by gavage. At postnatal day 60, Y-maze was used to evaluate working memory of offspring. Moreover, the expression levels of catechol O-methyltransferase (COMT) and glutamate decarboxylase 67 (GAD67) were measured in the frontal cortex of the brain samples. Only male offspring prenatally exposed to LPS showed a significant impairment in working memory. In addition, prenatal LPS exposure causes a moderate decrease in GAD67 expression level in the male pups, while COMT expression was found unchanged. Interestingly, zinc supplementation restored the alterations in working memory as well as GAD67 mRNA level in the male rats. No alteration was detected for neither working memory nor COMT/GAD67 genes expression in female offspring. This study demonstrates that zinc supplementation during pregnancy can attenuate LPS-induced impairments in male pups. These results support the idea to consume zinc supplementation during pregnancy to limit neurodevelopmental deficits induced by infections in offspring.
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Affiliation(s)
- Faezeh Alizadeh
- Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Nahid Davoodian
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran; Department of Clinical Biochemistry, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
| | - Haniyeh Kazemi
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Maryam Ghasemi-Kasman
- Infertility and Reproductive Health Research Center, Health Research Institute, Babol University of Medical Science, Babol, Iran; Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Fatemeh Shaerzadeh
- Department of Neuroscience, University of Florida College of Medicine and McKnight Brain Institute, Gainesville, FL, 32610, USA
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Levine KE, Collins BJ, Stout MD, Wyde M, Afton SE, Essader AS, Ennis TJ, Amato KE, McWilliams AC, Fletcher BL, Fernando RA, Harrington JM, Catlin N, Robinson VG, Waidyanatha S. Characterization of Zinc Carbonate Basic as a Source of Zinc in a Rodent Study Investigating the Effects of Dietary Deficiency or Excess. ANAL LETT 2017; 50:2447-2464. [PMID: 30930463 DOI: 10.1080/00032719.2017.1293073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Zinc deficiency and excess can result in adverse health outcomes. There is conflicting evidence regarding whether excess or deficient zinc in the diet can contribute to carcinogenicity. The objective of this study was to characterize zinc carbonate basic for use as a source of dietary zinc in a rodent toxicity and carcinogenicity study investigating the effects of zinc deficiency and excess. Because of the complex chemistries of zinc carbonate basic compounds, inconsistent nomenclature, and literature and reference spectra gaps, it was necessary to employ multiple analytical techniques, including Karl Fischer titration, combustion analysis, inductively coupled plasma-optical emission spectrometry, X-ray diffraction, infrared spectroscopy, X-ray fluorescence spectrometry, and thermogravimetric analysis to characterize the test article. Based on the collective evidence and through the process of elimination, the test article was found to be composed mainly of zinc carbonate basic with zinc oxide as a minor component. The zinc content was determined to be 56.6% (w/w) with heavy metals such as arsenic, cadmium, mercury and lead below the limit of quantitation of less than or equal to 0.01%. The test material was stable at ambient temperature. Based on the work described in this manuscript, the test article was suitable for use as a source of zinc in studies of deficiency and excess in the diet.
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Affiliation(s)
- Keith E Levine
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Bradley J Collins
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Matthew D Stout
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Michael Wyde
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Scott E Afton
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Amal S Essader
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Todd J Ennis
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Kelly E Amato
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Andrea C McWilliams
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Brenda L Fletcher
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Reshan A Fernando
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - James M Harrington
- RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC, 27709, USA
| | - Natasha Catlin
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Veronica G Robinson
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Suramya Waidyanatha
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, MD EC-06, P.O. Box 12233, 111 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA
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Hashimoto A, Nakagawa M, Tsujimura N, Miyazaki S, Kizu K, Goto T, Komatsu Y, Matsunaga A, Shirakawa H, Narita H, Kambe T, Komai M. Properties of Zip4 accumulation during zinc deficiency and its usefulness to evaluate zinc status: a study of the effects of zinc deficiency during lactation. Am J Physiol Regul Integr Comp Physiol 2016; 310:R459-68. [DOI: 10.1152/ajpregu.00439.2015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/18/2015] [Indexed: 11/22/2022]
Abstract
Systemic and cellular zinc homeostasis is elaborately controlled by ZIP and ZnT zinc transporters. Therefore, detailed characterization of their expression properties is of importance. Of these transporter proteins, Zip4 functions as the primarily important transporter to control systemic zinc homeostasis because of its indispensable function of zinc absorption in the small intestine. In this study, we closely investigated Zip4 protein accumulation in the rat small intestine in response to zinc status using an anti-Zip4 monoclonal antibody that we generated and contrasted this with the zinc-responsive activity of the membrane-bound alkaline phosphatase (ALP). We found that Zip4 accumulation is more rapid in response to zinc deficiency than previously thought. Accumulation increased in the jejunum as early as 1 day following a zinc-deficient diet. In the small intestine, Zip4 protein expression was higher in the jejunum than in the duodenum and was accompanied by reduction of ALP activity, suggesting that the jejunum can become zinc deficient more easily. Furthermore, by monitoring Zip4 accumulation levels and ALP activity in the duodenum and jejunum, we reasserted that zinc deficiency during lactation may transiently alter plasma glucose levels in the offspring in a sex-specific manner, without affecting homeostatic control of zinc metabolism. This confirms that zinc nutrition during lactation is extremely important for the health of the offspring. These results reveal that rapid Zip4 accumulation provides a significant conceptual advance in understanding the molecular basis of systemic zinc homeostatic control, and that properties of Zip4 protein accumulation are useful to evaluate zinc status closely.
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Affiliation(s)
- Ayako Hashimoto
- The Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Miki Nakagawa
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Natsuki Tsujimura
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Shiho Miyazaki
- The Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Kumiko Kizu
- Department of Life and Living, Osaka Seikei College, Osaka, Japan; and
| | - Tomoko Goto
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Yusuke Komatsu
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Ayu Matsunaga
- Department of Food Science, Kyoto Women's University, Kyoto, Japan
| | - Hitoshi Shirakawa
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Hiroshi Narita
- Department of Food Science, Kyoto Women's University, Kyoto, Japan
| | - Taiho Kambe
- The Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Michio Komai
- Department of Science of Food Function and Health, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
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7
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Ahmad SM, Hossain MB, Monirujjaman M, Islam S, Huda MN, Kabir Y, Raqib R, Lönnerdal BL. Maternal zinc supplementation improves hepatitis B antibody responses in infants but decreases plasma zinc level. Eur J Nutr 2015. [PMID: 26208687 DOI: 10.1007/s00394-015-0999-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE The World Health Report identifies zinc deficiency as one of the major causes of disease in developing countries, and infants are at particular risk. We aimed to investigate the effect of maternal zinc supplementation on the infant's immune function in a population at risk of deficiency. METHODS In a randomized, double-blind placebo-controlled trial, mothers were supplemented either with 20 mg/day of elemental zinc (n = 20) or placebo (n = 19) at the beginning of second trimester, which continued until 6 months postpartum. Indicators of the infants' immune function measured included interleukin (IL)-7, thymic size and response to hepatitis B vaccination. RESULTS Infants born from mothers receiving zinc supplements during pregnancy and postpartum had significantly lower plasma zinc (p < 0.05) but marginally higher IL-7 and antibody responses to hepatitis B vaccination (p < 0.10) than infants born from mothers not receiving zinc. Maternal zinc supplementation showed no negative impact on copper status of mothers or their infants. Maternal zinc supplementation did not influence infant thymic size, but cord blood IL-7 was found positively associated with thymus size at 1 month of age (r = 0.392) and with hepatitis B vaccine response at 6 months of age (r = 0.386). CONCLUSION Prenatal and postnatal zinc supplementation marginally improved T cell-dependent antibody responses in infants along with IL-7, a cytokine involved in human T cell development and maintaining homeostasis.
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Affiliation(s)
| | | | - Md Monirujjaman
- Nutritional Biochemistry, Center for Vaccine Sciences, icddr,b, Mohakhali, Dhaka, 1212, Bangladesh
| | - Sharmin Islam
- Nutritional Biochemistry, Center for Vaccine Sciences, icddr,b, Mohakhali, Dhaka, 1212, Bangladesh
| | - Md Nazmul Huda
- Nutritional Biochemistry, Center for Vaccine Sciences, icddr,b, Mohakhali, Dhaka, 1212, Bangladesh.,Department of Nutrition, University of California, Davis, Davis, CA, 95616, USA
| | - Yearul Kabir
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, Bangladesh
| | - Rubhana Raqib
- Nutritional Biochemistry, Center for Vaccine Sciences, icddr,b, Mohakhali, Dhaka, 1212, Bangladesh
| | - Bo L Lönnerdal
- Department of Nutrition, University of California, Davis, Davis, CA, 95616, USA
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8
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Raiten DJ, Sakr Ashour FA, Ross AC, Meydani SN, Dawson HD, Stephensen CB, Brabin BJ, Suchdev PS, van Ommen B. Inflammation and Nutritional Science for Programs/Policies and Interpretation of Research Evidence (INSPIRE). J Nutr 2015; 145:1039S-1108S. [PMID: 25833893 PMCID: PMC4448820 DOI: 10.3945/jn.114.194571] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/08/2014] [Accepted: 10/29/2014] [Indexed: 02/06/2023] Open
Abstract
An increasing recognition has emerged of the complexities of the global health agenda—specifically, the collision of infections and noncommunicable diseases and the dual burden of over- and undernutrition. Of particular practical concern are both 1) the need for a better understanding of the bidirectional relations between nutritional status and the development and function of the immune and inflammatory response and 2) the specific impact of the inflammatory response on the selection, use, and interpretation of nutrient biomarkers. The goal of the Inflammation and Nutritional Science for Programs/Policies and Interpretation of Research Evidence (INSPIRE) is to provide guidance for those users represented by the global food and nutrition enterprise. These include researchers (bench and clinical), clinicians providing care/treatment, those developing and evaluating programs/interventions at scale, and those responsible for generating evidence-based policy. The INSPIRE process included convening 5 thematic working groups (WGs) charged with developing summary reports around the following issues: 1) basic overview of the interactions between nutrition, immune function, and the inflammatory response; 2) examination of the evidence regarding the impact of nutrition on immune function and inflammation; 3) evaluation of the impact of inflammation and clinical conditions (acute and chronic) on nutrition; 4) examination of existing and potential new approaches to account for the impact of inflammation on biomarker interpretation and use; and 5) the presentation of new approaches to the study of these relations. Each WG was tasked with synthesizing a summary of the evidence for each of these topics and delineating the remaining gaps in our knowledge. This review consists of a summary of the INSPIRE workshop and the WG deliberations.
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Affiliation(s)
- Daniel J Raiten
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD;
| | - Fayrouz A Sakr Ashour
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD
| | - A Catharine Ross
- Departments of Nutritional Sciences and Veterinary and Biomedical Science and Center for Molecular Immunology and Infectious Disease, Pennsylvania State University, University Park, PA
| | - Simin N Meydani
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA
| | - Harry D Dawson
- USDA-Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet, Genomics, and Immunology Laboratory, Beltsville, MD
| | - Charles B Stephensen
- Agricultural Research Service, Western Human Nutrition Research Center, USDA, Davis, CA
| | - Bernard J Brabin
- Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, United Kingdom; Global Child Health Group, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Parminder S Suchdev
- Department of Pediatrics and Global Health, Emory University, Atlanta, GA; and
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9
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Dempsey C, McCormick NH, Croxford TP, Seo YA, Grider A, Kelleher SL. Marginal maternal zinc deficiency in lactating mice reduces secretory capacity and alters milk composition. J Nutr 2012; 142:655-60. [PMID: 22357740 PMCID: PMC3301987 DOI: 10.3945/jn.111.150623] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 09/16/2011] [Accepted: 12/27/2011] [Indexed: 11/14/2022] Open
Abstract
Dietary analysis predicts that marginal Zn deficiency is common in women of reproductive age. The lack of reliable biomarkers limits the capacity to assess Zn status and consequently understand effects of maternal Zn deficiency. We determined effects of marginal maternal Zn deficiency on mammary gland function, milk secretion, and milk composition in mice. Mice (n = 12/diet) were fed marginal (ZD; 15 mg Zn/kg diet) or adequate (ZA; 30 mg Zn/kg diet) Zn diets for 30 d prior to conception through mid-lactation. Mice fed the ZD had a higher plasma Zn concentration (~20%; P < 0.05) but lower milk Zn concentration (~15%; P < 0.05) compared with mice fed the ZA. ZnT2 abundance was higher (P < 0.05) in mice fed the ZD compared with mice fed the ZA; no effect on ZnT4 abundance was detected. The Zn concentration of mammary gland mitochondria tended to be ~40% greater in mice fed ZD (P = 0.07); this was associated with apoptosis and lower milk secretion (~80%; P < 0.01). Total milk protein was ~25% higher (P < 0.05), although the abundance of the major milk proteins (caseins and whey acidic protein) was lower (P < 0.05) in mice fed the ZD. Proteomic analysis of milk proteins revealed an increase (P < 0.05) in four proteins in mice fed the ZD. These findings illustrate that marginal maternal Zn deficiency compromises mammary gland function and milk secretion and alters milk composition. This suggests that lactating women who consume inadequate Zn may not produce and/or secrete an adequate amount of high quality milk to provide optimal nutrition to their developing infant.
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Affiliation(s)
| | | | | | | | - Arthur Grider
- Department of Foods and Nutrition, University of Georgia, Athens, GA
| | - Shannon L. Kelleher
- Department of Nutritional Sciences
- Department of Surgery, and
- Department of Cell and Molecular Physiology, The Pennsylvania State University, University Park, PA; and
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10
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Berger J, Wieringa FT, Lacroux A, Dijkhuizen MA. Strategies to prevent iron deficiency and improve reproductive health. Nutr Rev 2011; 69 Suppl 1:S78-86. [DOI: 10.1111/j.1753-4887.2011.00436.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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11
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Sharkar MTK, Jou MY, Hossain MB, Lönnerdal B, Stephensen CB, Raqib R. Prenatal zinc supplementation of zinc-adequate rats adversely affects immunity in offspring. J Nutr 2011; 141:1559-64. [PMID: 21697297 DOI: 10.3945/jn.110.129569] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We previously showed that zinc (Zn) supplementation of Zn-adequate dams induced immunosuppressive effects that persist in the offspring after weaning. We investigated whether the immunosuppressive effects were due to in utero exposure and/or mediated via milk using a cross-fostering design. Pregnant rats with adequate Zn nutriture were supplemented with either Zn (1.5 mg Zn in 10% sucrose) or placebo (10% sucrose) during pregnancy (3 times/wk). At postnatal d 3, 4 pups of Zn-supplemented dams (Zn-P) were exchanged with 4 of placebo-supplemented dams (P-Zn). The remaining pups continued with their biological mothers (Zn-Zn and P-P). Pups were orally immunized with dinitrophenol ovalbumin-BSA and/or cholera toxin B subunit (CTB), and serum Zn concentrations and cellular and humoral responses were assessed. Pups of Zn-supplemented dams had higher serum Zn when fostered either by placebo- or Zn-supplemented dams compared to pups of placebo-supplemented dams (P < 0.01). Postnatal Zn exposure reduced the number of Peyer's patches in both the Zn-Zn and P-Zn groups (P < 0.01). Prenatal Zn exposure suppressed CTB- (P = 0.05) and BSA-specific proliferation response of Peyer's Patch lymphocytes (P = 0.07). Prenatal Zn exposure effects on the splenocyte cytokine response were differently influenced by fostering mothers' Zn status. Antigen presenting cell (APC) activity of splenocytes was lower in the Zn-Zn group than in the P-P group (P < 0.08). In conclusion, prenatal Zn exposure increases serum Zn levels in pups and suppresses antigen-specific proliferation and antibody responses and APC function, whereas postnatal exposure may suppress the mucosal immune reservoir.
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Affiliation(s)
- Mohammad T K Sharkar
- International Centre for Diarrhoeal Diseases Research, Bangladesh, Dhaka-1212, Bangladesh
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12
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Reported zinc, but not copper, intakes influence whole-body bone density, mineral content and T score responses to zinc and copper supplementation in healthy postmenopausal women. Br J Nutr 2011; 106:1872-9. [DOI: 10.1017/s0007114511002352] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A supplementation trial starting with 224 postmenopausal women provided with adequate vitamin D and Ca was conducted to determine whether increased Cu and Zn intakes would reduce the risk for bone loss. Healthy women aged 51–80 years were recruited for a double-blind, placebo-controlled study. Women with similar femoral neck T scores and BMI were randomly assigned to two groups of 112 each that were supplemented daily for 2 years with 600 mg Ca plus maize starch placebo or 600 mg Ca plus 2 mg Cu and 12 mg Zn. Whole-body bone mineral contents, densities and T scores were determined biannually by dual-energy X-ray absorptiometry, and 5 d food diaries were obtained annually. Repeated-measures ANCOVA showed that bone mineral contents, densities and T scores decreased from baseline values to year 2. A priori contrasts between baseline and year 2 indicated that the greatest decreases occurred with Cu and Zn supplementation. Based on 5 d food diaries, the negative effect was caused by Zn and mainly occurred with Zn intakes ≥ 8·0 mg/d. With Zn intakes < 8·0 mg/d, Zn supplementation apparently prevented a significant decrease in whole-body bone densities and T scores. Food diaries also indicated that Mg intakes < 237 mg/d, Cu intakes < 0·9 mg/d and Zn intakes < 8·0 mg/d are associated with poorer bone health. The findings indicate that Zn supplementation may be beneficial to bone health in postmenopausal women with usual Zn intakes < 8·0 mg/d but not in women consuming adequate amounts of Zn.
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13
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Maternal micronutrient supplementation with zinc and β-carotene affects morbidity and immune function of infants during the first 6 months of life. Eur J Clin Nutr 2010; 64:1072-9. [PMID: 20683457 DOI: 10.1038/ejcn.2010.115] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND/OBJECTIVES Micronutrient deficiencies are prevalent worldwide, and a major cause of infant death. Supplementation with multiple micronutrients during pregnancy might improve micronutrient status of the newborn, thereby reducing morbidity and death. Moreover, maternal supplementation might affect the newborn's immune development. Therefore, this study investigated the effects of maternal zinc and β-carotene supplementation on the infant's morbidity and immune function during the first 6 months of life. SUBJECTS/METHODS Mothers were supplemented during pregnancy with β-carotene and/or zinc, in addition to iron and folic acid, in a randomized, double-blind controlled trial. Newborn infants (n=136) were followed up for 6 months. RESULTS Infants born from mothers receiving zinc during pregnancy had significantly fewer episodes of diarrhoea than infants born from mothers not receiving zinc (0.2 and 0.4, respectively), but more episodes of cough (1.3 and 0.9 respectively) during the first 6 months. Maternal β-carotene supplementation had no effect on infants' morbidity. Cytokine production in the newborns was affected by maternal zinc and β-carotene supplementation, with zinc supplementation giving higher interleukin-6 production (16% higher), and β-carotene supplementation leading to lower interferon-γ production (36% lower). CONCLUSIONS This study shows that maternal supplementation with zinc and β-carotene affected the newborn's immune development in specific ways, but only maternal zinc supplementation significantly affected morbidity in the infants. Addition of zinc to routine iron and folic acid supplements for pregnant women could be an effective way to reduce diarrhoeal disease during the first 6 months of life, albeit at the expense of more episodes of cough.
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14
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Murillo-Fuentes ML, Artillo R, Ojeda ML, Murillo ML, Carreras O. Different effects on zinc redistribution if ethanol is consumed before or immediately after birth. J Trace Elem Med Biol 2010; 24:200-6. [PMID: 20507833 DOI: 10.1016/j.jtemb.2009.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Revised: 09/07/2009] [Accepted: 12/11/2009] [Indexed: 11/22/2022]
Abstract
AIMS The effect of ethanol consumption, either during pregnancy and/or lactation, on the altered metabolism of zinc (Zn) is not well-defined. Therefore, this study was performed to analyse the effect of chronic ethanol exposure on Zn redistribution in dams and offspring during either gestation and/or lactation. METHODS We have used three groups of Wistar rat dams: control (CD), ethanol (ED), and pair-fed dams (PD). Some of the newborns were cross-fostered to dams at birth and we formed five experimental groups of offspring: control (CO); those exposed to ethanol during gestation only (GO); those exposed to ethanol during lactation only (LO); those exposed to ethanol during both periods (EO); and pair-fed groups (PO). Zn levels were measured by flame atomic absorption spectrophotometry. RESULTS Zinc distribution is altered in ED with respect to CD, presenting significantly higher Zn values in the brain and spleen, and lower levels in the liver. However, total organs Zn levels are similar between dams. Ethanol-treated offspring (GO, LO, EO) consumed significantly less Zn than the CO. However, LO and EO showed significantly higher Zn serum levels. Zn distribution was altered in ethanol-treated offspring. GO and LO showed lower Zn levels in liver than CO; GO presents the lowest Zn liver levels. These levels were significantly lower than EO and PO. Ethanol-treated pups present significantly higher spleen and testes values than CO and PO. Total organ Zn levels were significantly lower in GO. CONCLUSIONS Maternal adaptation resulted in organ Zn retention in order to meet the demands of pup's growth in the face of a lower diet intake. However, there was a redistribution of Zn in organ contents. Therefore, the ethanol route administration (via placenta and/or milk) affects Zn redistribution in pups in a different way.
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15
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Nagata M, Lönnerdal B. Role of zinc in cellular zinc trafficking and mineralization in a murine osteoblast-like cell line. J Nutr Biochem 2010; 22:172-8. [PMID: 20378322 DOI: 10.1016/j.jnutbio.2010.01.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2009] [Revised: 12/31/2009] [Accepted: 01/11/2010] [Indexed: 11/25/2022]
Abstract
Zinc (Zn) supplementation stimulates bone growth in Zn-deficient humans and animals. A biphasic pattern of mineralization has been observed in cultured osteoblasts; an initiation phase and a progression phase. We used MC3T3-E1, a murine osteoblastic cell line, to elucidate the physiological role of Zn in osteoblast mineralization and cellular Zn trafficking during the mineralization event. Cells were cultured in media containing Chelex-treated fetal bovine serum and 1, 4, 10 and 20 μM Zn as ZnSO(4) for 14 days (early phase of mineralization) or 21 days (mid-to-late phase of mineralization). During the early phase of mineralization, Alizarin Red staining indicated that mineralization was increased by Zn in a dose-dependent manner. Although Zn exposure did not affect monolayer Zn concentration, metallothionein (MT) mRNA expression increased dose-dependently as assessed by real-time PCR. During the late phase of mineralization, mineralization was maximal at 1 μM Zn and monolayer Zn concentration reflected Zn exposure. The increase in MT mRNA expression during the late phase was similar to that during the early phase, but the difference in expression between culture Zn concentrations tended to be smaller. ZnT-2 mRNA expression decreased significantly with increasing zinc concentrations in the culture medium during the early phase, but increased significantly during the late phase. Osteocalcin mRNA levels were positively correlated to Zn exposure at both time points. Taken together, we propose that Zn may play an important role in osteoblast mineralization through Zn trafficking involving Zn storage proteins and Zn transporters.
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Affiliation(s)
- Masashi Nagata
- Nutrition Research Department, Food Science Institute, Meiji Dairies Corporation, Odawara, Kanagawa 250-0862, Japan.
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16
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Hess SY, King JC. Effects of maternal zinc supplementation on pregnancy and lactation outcomes. Food Nutr Bull 2009; 30:S60-78. [PMID: 19472602 DOI: 10.1177/15648265090301s105] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Observational studies in human populations suggest that maternal zinc deficiency during pregnancy may cause adverse pregnancy outcomes for the mother and fetus. Therefore, we reviewed the current evidence from studies of zinc supplementation, with or without other micronutrients, during pregnancy and lactation to assess its impact on maternal, fetal, and infant health. A meta-analysis of supplementation trials indicates a 14% reduction in premature delivery among zinc-supplemented women. Most studies found no significant impact of maternal zinc supplementation on infant birthweight, but a subset of studies conducted in underweight or zinc-deficient women suggests that there may be a positive effect of zinc supplementation in such women. However, the number of relevant studies is limited, and more information is needed to confirm these observations. The results for other pregnancy outcomes are inconsistent, and the number of available studies is small. Likewise, the impact of maternal zinc supplementation during pregnancy on infant postnatal growth and risk of infection is variable, and few studies are available. Thus, more research will be needed to allow definitive conclusions to be drawn, especially for the second half of infancy and later childhood. Studies found no adverse effects of maternal zinc supplementation on iron status during pregnancy. More information is required on other potential adverse effects, particularly with regard to a possible modifying effect of preexisting maternal zinc status. In view of the possible benefits of zinc supplementation for reducing the risk of premature delivery, the possible positive impact of zinc supplementation on infant birthweight among undernourished women, and the lack of reported adverse effects, zinc should be included in maternal supplements given during pregnancy in populations at risk for zinc deficiency.
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Affiliation(s)
- Sonja Y Hess
- Department of Nutrition, University of California, Davis, California, USA
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17
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Azman MS, Wan Saudi WS, Ilhami M, Mutalib MSA, Rahman MT. Zinc intake during pregnancy increases the proliferation at ventricular zone of the newborn brain. Nutr Neurosci 2009; 12:9-12. [PMID: 19178786 DOI: 10.1179/147683009x388904] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Neurogenesis involves cell proliferation, cell cycle arrest, differentiation, migration and the natural developmental death of the neural precursors. These processes are highly co-ordinated and governed by cell-cycle genes and neural transcription factors. Zn plays a crucial role as a functional and structural component of enzymes and transcription factors and components of the intracellular signaling pathway associated with the regulation of cell proliferation. The influence of additional Zn intake during pregnancy on the neuronal proliferation at ventricular zone of the developing fetus has been studied. Pups delivered by the group of mice provided with drinking water with 4.0 mM Zn supplement throughout pregnancy contained an increased number of proliferating neurons in the ventricular zone at P0 compared to those delivered by the mice provided with drinking water without any Zn supplement. This finding provides direct evidence to support the notion that maternal Zn levels influence the development of the nervous system of the offspring.
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Affiliation(s)
- Mohd S Azman
- Department of Biomedical Science, Faculty of Science, International Islamic University Malaysia (IIUM), Kuantan, Malaysia
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