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Ernawati F, Efriwati, Nurjanah N, Aji GK, Hapsari Tjandrarini D, Widodo Y, Retiaty F, Prihatini M, Arifin AY, Sundari D, Rachmalina R, Salimar, Julianti ED, Aidi MN, Syauqy A. Micronutrients and Nutrition Status of School-Aged Children in Indonesia. J Nutr Metab 2023; 2023:4610038. [PMID: 37705875 PMCID: PMC10497362 DOI: 10.1155/2023/4610038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 07/21/2023] [Accepted: 08/26/2023] [Indexed: 09/15/2023] Open
Abstract
Micronutrient deficiencies (MNDs) in school-aged children are still a major health problem in Indonesia. This study was designed to examine the status of micronutrients and their relationship to the nutritional status of children aged 5-12 years since an up-to-date database on the micronutrient status of children aged 5-12 years is needed. Data from the 2018 Indonesian Basic Health Research (Riskesdas) were used in this study, with 2456 subjects for analysis. Micronutrient analysis was carried out, including iron status (ferritin, C reactive protein (CRP)), levels of zinc, vitamin D, calcium, and vitamin A (retinol) in school-aged children (5-12 years). The ELISA measurement was applied to measure CRP, ferritin, and vitamin D. Zinc levels were analysed with atomic absorbance spectroscopy (AAS). Moreover, high-performance liquid chromatography (HPLC) was applied to calculate vitamin A. In addition, stunting and thinness data were also obtained from the Riskesdas study. The results showed that the prevalence of stunting and thinness in school-aged children was 11.4% and 9.2%, respectively, showing that the stunting prevalence in the city was lower than in the village (4.5% vs. 6.9%, P = 0.000, respectively). In addition, the prevalence of MNDs in Indonesian children was 13.4%, 19.7%, 4.2%, 3%, and 12.7% for ferritin, zinc, calcium, vitamin A, and vitamin D, respectively. The mean serum level of vitamin A and zinc was significantly lower in stunted children compared to normal school children (P = 0.010 and P = 0.014). The serum concentration of vitamin D was significantly lower in overweight children compared to thin and normal children (P = 0.000). Serum values of ferritin, zinc, and vitamin A were significantly higher in overweight children compared to thin and normal children (P = 0.000). A poor correlation was observed between the z-score of height-for-age (HAZ) and the levels of zinc (r = 0.089, P = 0.000), vitamin A (r = 0.105, P = 0.000), and vitamin D (-0.073, P = 0.000). In addition, very weak correlations between z-scores of body mass index-for-age (BAZ) and the serum concentrations of ferritin (0.091, P = 0.000), zinc (r = 0.115, P = 0.000), vitamin A (r = 0.137, P = 0.000), and vitamin D (r = -0.112, P = 0.000) were also seen. In conclusion, school-aged children in Indonesia experienced stunting, thinness, and micronutrient deficiency. Furthermore, stunting and thinness were also related to micronutrient deficiencies.
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Affiliation(s)
- Fitrah Ernawati
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Efriwati
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Nunung Nurjanah
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Galih Kusuma Aji
- Research Center for Agroindustry, National Research and Innovation Agency, BJ Habibie Science Center, Setu, Kota Tangerang Selatan, Banten 15314, Indonesia
| | - Dwi Hapsari Tjandrarini
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Yekti Widodo
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Fifi Retiaty
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Mutiara Prihatini
- Health Policy Agency (BKPK), Ministry of Health, Jl. Percetakan Negara, Jakarta Pusat 10560, Indonesia
| | - Aya Yuriestia Arifin
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Dian Sundari
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Rika Rachmalina
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Salimar
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Elisa Diana Julianti
- Research Center for Public Health and Nutrition, National Research and Innovation Agency, Cibinong Science Center, Jl. Raya Jakarta-Bogor No. KM 46, Pakansari, Kecamatan Cibinong, Kabupaten Bogor, Jawa Barat 16911, Indonesia
| | - Muhammad Nur Aidi
- Department of Statistics, IPB University, Jalan Meranti Wing 22 Level 4, Babakan, Dramaga, Kabupaten Bogor, Jawa Barat 16680, Indonesia
| | - Ahmad Syauqy
- Department of Nutrition Science, Diponegoro University, Jl. Prof Sudarto, Tembalang, Kota Semarang 50275, Indonesia
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Ali M, Aziz T. The Combination of Zinc and Melatonin Enhanced Neuroprotection and Attenuated Neuropathy in Oxaliplatin-Induced Neurotoxicity. Drug Des Devel Ther 2022; 16:3447-3463. [PMID: 36217449 PMCID: PMC9547652 DOI: 10.2147/dddt.s385914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 09/22/2022] [Indexed: 11/23/2022] Open
Abstract
Objective The present study was designed to investigate the possible synergistic effects of melatonin with zinc in the prevention and treatment of oxaliplatin-induced neurotoxicity in rats. Methodology Forty-eight male Wistar albino rats were used and randomly allocated into six groups: The negative control group, oxaliplatin group, zinc + oxaliplatin group, melatonin + oxaliplatin group, zinc + melatonin + oxaliplatin prevention-approach group, and zinc + melatonin + oxaliplatin treatment-approach group. The thermal nociceptive/hyperalgesia tests were performed. Brain tissue homogenate was used for measuring GFAP, NCAM, TNF α, MAPK 14, NF-kB, GPX, and SOD. Brain tissue was sent for histopathological and immunohistochemistry studies. Results The combination therapies showed improvement in the behavioral tests. A significant increase in GPX and SOD with a significant decrease in GFAP levels resulted in the prevention approach. TNF α decreased significantly in the treatment approach. No significant changes were seen in NCAM, NFkB, and MAPK-14. The histopathological findings support the biochemical results. Additionally, immunohistochemistry revealed a significant attenuation of p53 and a non-significant decrease in Bcl2 levels in the combination groups. Conclusion The combination of zinc with melatonin for the prevention approach was effective in attenuating neurotoxicity induced by oxaliplatin. The proposed mechanisms are boosting the antioxidant system and attenuating the expression of p53, GFAP, and TNF-α.
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Affiliation(s)
- Mayyadah Ali
- Hiwa Cancer Hospital, Sulaimani, Kurdistan Region, Iraq
| | - Tavga Aziz
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Sulaimani, Sulaimani, Kurdistan Region, Iraq,Correspondence: Tavga Aziz, Tel +9647701523544, Email
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Willekens J, Runnels LW. Impact of Zinc Transport Mechanisms on Embryonic and Brain Development. Nutrients 2022; 14:nu14122526. [PMID: 35745255 PMCID: PMC9231024 DOI: 10.3390/nu14122526] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/09/2022] [Accepted: 06/09/2022] [Indexed: 12/04/2022] Open
Abstract
The trace element zinc (Zn) binds to over ten percent of proteins in eukaryotic cells. Zn flexible chemistry allows it to regulate the activity of hundreds of enzymes and influence scores of metabolic processes in cells throughout the body. Deficiency of Zn in humans has a profound effect on development and in adults later in life, particularly in the brain, where Zn deficiency is linked to several neurological disorders. In this review, we will summarize the importance of Zn during development through a description of the outcomes of both genetic and early dietary Zn deficiency, focusing on the pathological consequences on the whole body and brain. The epidemiology and the symptomology of Zn deficiency in humans will be described, including the most studied inherited Zn deficiency disease, Acrodermatitis enteropathica. In addition, we will give an overview of the different forms and animal models of Zn deficiency, as well as the 24 Zn transporters, distributed into two families: the ZIPs and the ZnTs, which control the balance of Zn throughout the body. Lastly, we will describe the TRPM7 ion channel, which was recently shown to contribute to intestinal Zn absorption and has its own significant impact on early embryonic development.
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Mrimi EC, Palmeirim MS, Minja EG, Long KZ, Keiser J. Malnutrition, anemia, micronutrient deficiency and parasitic infections among schoolchildren in rural Tanzania. PLoS Negl Trop Dis 2022; 16:e0010261. [PMID: 35245314 PMCID: PMC8926280 DOI: 10.1371/journal.pntd.0010261] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 03/16/2022] [Accepted: 02/15/2022] [Indexed: 12/01/2022] Open
Abstract
Background Malnutrition, anemia, micronutrient deficiency and parasitic infections continue to impact the nutritional status and health of children in lower-income countries. However, not enough data concerning this issue is available. The aim of this study was to assess the distribution of nutritional indicators, anemia and micronutrient deficiency and their underlying risk factors among schoolchildren in south-eastern Tanzania. Methodology/Principal findings This cross-sectional study enrolled primary schoolchildren aged 6–12 years from Kikwawila and Kiberege wards, Tanzania. In total, 471 schoolchildren underwent a physical examination and provided blood, stool and urine samples for an assessment of the levels of different micronutrients, nutritional and anemia status, and parasitic infection status. We employed bivariate and multivariate logistic regression to determine the association between nutritional statuses, anemia, micronutrient deficiency and parasitic infections. We found that 23.90%, 12.60% and 16.20% of schoolchildren were stunted, underweight and wasted, respectively. About 14.0% of schoolchildren were found to be anemic. Children diagnosed with Plasmodium falciparum infection were more likely to have low levels of ferritin (aOR: 10.40, 95% CI: 2.88-40.53) and elevated levels of serum soluble transferrin receptor (aOR: 3.59, 95% CI: 1.27-11.23), respectively. Vitamin A (34.71%) and vitamin B12 (8.79%) were the most prevalent micronutrients found to be deficient in diagnosed children. Finally, we found that schoolchildren attending the most rural schools were five times more likely to be diagnosed with at least one micronutrient deficiency (aOR: 5.04, 95% CI: 2.38–11.44). Conclusions/Significance Malnutrition, anemia and micronutrient deficiency still pose a significant health burden among schoolchildren living in rural Tanzania. To effectively tackle this burden, health interventions such as deworming, micronutrient supplementation, vector control, health education and access to clean water and improved sanitation should be strengthened and made sustainable. In this study, we assessed the distribution and risk factors of nutritional indicators, anemia and micronutrient deficiency among schoolchildren of the Kikwawila and Kiberege wards, Tanzania. Our analysis revealed that malnutrition in form of stunting and wasting is still very high among schoolchildren in this region. About 14.0% of children were found to be anemic. Micronutrient deficiency was highly variable ranging from 0.50% (Folate) to 35.0% (Vitamin A). Schoolchildren from most rural schools were more likely to be found stunted and deficient with at least one type of micronutrient. Efforts to control and eliminate malnutrition, anemia, micronutrient deficiency and parasitic infections would benefit from sustainable and integrated approaches such as deworming, micronutrient supplementation, health education, vector control and an improvement in access to clean water and improved sanitation.
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Affiliation(s)
- Emmanuel C. Mrimi
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
- Ifakara Health Institute, Ifakara, Tanzania
| | - Marta S. Palmeirim
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | | | - Kurt Z. Long
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Jennifer Keiser
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
- * E-mail:
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Haile D, Brown KH, McDonald CM, Luo H, Jarvis M, Teta I, Ndjebayi A, Martial GAJ, Vosti SA, Engle-Stone R. Applying Zinc Nutrient Reference Values as Proposed by Different Authorities Results in Large Differences in the Estimated Prevalence of Inadequate Zinc Intake by Young Children and Women and in Cameroon. Nutrients 2022; 14:nu14040883. [PMID: 35215534 PMCID: PMC8879783 DOI: 10.3390/nu14040883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 02/06/2023] Open
Abstract
Nutrient reference values (NRVs) for zinc set by several expert groups differ widely and may affect the predicted prevalence of inadequate zinc intake. We examined this possibility using NRVs published by four different authorities and nationally representative dietary intake data collected among children aged 12–59 months and women in Cameroon. Usual zinc intake was estimated from 24 h recall data using the National Cancer Institute method. Prevalences of total zinc intake below the dietary requirement and of “absorbable zinc intake” below the physiological requirement were estimated using NRVs published by the World Health Organization (WHO), US Institute of Medicine (IOM), International Zinc Nutrition Consultative Group (IZiNCG), and European Food Safety Authority (EFSA). The prevalence of inadequate zinc intake ranged from 10% (IZiNCG—physiological requirement, 95% CI 7–13%) to 81% (EFSA—physiological requirement, 95% CI 78–84%) among children and 9% (WHO—physiological requirement, 95% CI 8–11.0%) to 94% (IOM—physiological requirement, 95% CI 92–95%) among women These differences in the prevalence of inadequate intake translated into sizeable differences in the predicted benefit and cost-effectiveness of zinc fortification programs. Depending on the NRVs applied, assessments differ regarding the need for and design of zinc fortification programs. Efforts are needed to harmonize NRVs for zinc.
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Affiliation(s)
- Demewoz Haile
- Department of Nutrition, University of California, Davis, CA 95616, USA; (K.H.B.); (C.M.M.); (H.L.); (R.E.-S.)
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
- Correspondence: ; Tel.: +1-530-601-3869
| | - Kenneth H. Brown
- Department of Nutrition, University of California, Davis, CA 95616, USA; (K.H.B.); (C.M.M.); (H.L.); (R.E.-S.)
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
| | - Christine M. McDonald
- Department of Nutrition, University of California, Davis, CA 95616, USA; (K.H.B.); (C.M.M.); (H.L.); (R.E.-S.)
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
- Departments of Pediatrics, and Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, CA 94143, USA
| | - Hanqi Luo
- Department of Nutrition, University of California, Davis, CA 95616, USA; (K.H.B.); (C.M.M.); (H.L.); (R.E.-S.)
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
- Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
| | - Michael Jarvis
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
| | - Ismael Teta
- Helen Keller International, Yaoundé 1771, Cameroon; (I.T.); (A.N.)
| | - Alex Ndjebayi
- Helen Keller International, Yaoundé 1771, Cameroon; (I.T.); (A.N.)
| | | | - Stephen A. Vosti
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
- Department of Agricultural and Resource Economics, University of California, Davis, CA 95616, USA
| | - Reina Engle-Stone
- Department of Nutrition, University of California, Davis, CA 95616, USA; (K.H.B.); (C.M.M.); (H.L.); (R.E.-S.)
- Institute for Global Nutrition, University of California, Davis, CA 95616, USA; (M.J.); (S.A.V.)
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El Wakeel MA, El-Kassas GM, Fouad Ahmed G, Ali WH, Elsheikh EM, El-Zayat SR, Fadl NN, Kamel EH, Rabah TM. Fecal Markers of Environmental Enteric Dysfunction and their Relation to Faltering Growth in a Sample of Egyptian Children. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.7029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Chronic malnutrition is a long-term health condition that has threatening effects on children’s health. Environmental enteric dysfunction (EED) is a subclinical disorder affecting the small intestine that may occur due to exposure to environmental pathogens and toxins.
AIM: The present research was intended to detect the value of fecal biomarkers of intestinal epithelial damage alpha-1anti-trypsin (AAT) and intestinal inflammation Myeloperoxidase (MPO) and Neopetrin (NEO), also to quantify their association with faltering growth in stunted and underweight children.
PATIENTS AND METHODS: This case–control study included 105 children with moderate malnutrition as a case group and 100 children of normal body weight and height as a control group. Quantification of fecal markers levels of intestinal permeability AAT and intestinal inflammation (NEO and MPO) along with serum micronutrients levels (iron and zinc) in children with malnutrition in comparison to controls.
RESULTS: Fecal markers of intestinal permeability AAT and intestinal inflammation NEO had statistically significant higher levels in children with malnutrition, while serum micronutrients (iron and zinc) had statistically significant lower levels in children with malnutrition.
CONCLUSION: Faltering growth is associated with elevated fecal markers of intestinal permeability AAT and intestinal inflammation NEO. EED may be a cause for faltering growth.
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Vermeulen KM, Lopes MMGD, Alves CX, Brito NJN, das Graças Almeida M, Leite-Lais L, Vale SHL, Brandão-Neto J. Bioelectrical Impedance Vector Analysis and Phase Angle on Different Oral Zinc Supplementation in Eutrophic Children: Randomized Triple-Blind Study. Nutrients 2019; 11:nu11061215. [PMID: 31142044 PMCID: PMC6627540 DOI: 10.3390/nu11061215] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/03/2019] [Accepted: 05/07/2019] [Indexed: 12/12/2022] Open
Abstract
The parameters derived from bioelectrical impedance, phase angle (PA) and bioelectrical impedance vector analysis (BIVA) have been associated with cell membrane integrity and body cell mass. Zinc is a micronutrient that exerts important structural functions and acts in maintaining cellular functionality. To evaluate cell integrity and body cell mass, PA and BIVA were evaluated in children orally supplemented with zinc at different concentrations. Anthropometric, bioelectrical (resistance and reactance) and serum zinc variables were collected from two randomized, triple-blind, controlled clinical trials. Sampling was composed of 71 children consisting of three groups: a control group who received a placebo and two experimental groups who received oral supplementation of 5 or 10 mg-Zn/day for three months. The three groups presented increases (p < 0.001) in the linear height and weight. In the group supplemented with 10 mg-Zn/day, there was an increase in reactance values (p = 0.036) and PA (p = 0.002), in addition to vector displacement (p < 0.001) in relation to the confidence ellipses. An increase in serum zinc concentration was found (p < 0.001) in all three groups. Whit this, the supplementation with 10 mg-Zn/day promotes changes in the integrity of the cell membrane associated with the increase in the cellular mass of healthy children.
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Affiliation(s)
- Karina M Vermeulen
- Post-graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal CEP 59012-570, RN, Brazil.
| | - Márcia Marília G D Lopes
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal CEP 59078-970, RN, Brazil.
| | - Camila X Alves
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal CEP 59078-970, RN, Brazil.
| | - Naira J N Brito
- Department of Pharmacy, University of Cuiabá, Cuiabá CEP 78850-000, MT, Brazil.
| | - Maria das Graças Almeida
- Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Natal CEP 59012-570, RN, Brazil.
| | - Lucia Leite-Lais
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal CEP 59078-970, RN, Brazil.
| | - Sancha Helena L Vale
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal CEP 59078-970, RN, Brazil.
| | - José Brandão-Neto
- Department of Internal Medicine, Federal University of Rio Grande do Norte, Natal CEP 59012-570, RN, Brazil.
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MiRNA-target interactions in osteogenic signaling pathways involving zinc via the metal regulatory element. Biometals 2018; 32:111-121. [PMID: 30564968 DOI: 10.1007/s10534-018-00162-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 12/04/2018] [Indexed: 01/11/2023]
Abstract
Adequate zinc nutriture is necessary for normal bone growth and development, though the precise mechanisms for zinc-mediated bone growth remain poorly defined. A key transcription factor activated by zinc is metal response element-binding transcription factor 1 (MTF-1), which binds to the metal regulatory element (MRE). We hypothesize that MREs will be found upstream of miRNA genes as well as miRNA target genes in the following bone growth and development signaling pathways: TGF-β, MAPK, and Wnt. A Bioconductor-based workflow in R was designed to identify interactions between MREs, miRNAs, and target genes. MRE sequences were found upstream from 64 mature miRNAs that interact with 213 genes which have MRE sequences in their own promoter regions. MAPK1 exhibited the most miRNA-target interactions (MTIs) in the TGF-β and MAPK signaling pathways; CCND2 exhibited the most interactions in the Wnt signaling pathway. Hsa-miR-124-3p exhibited the most MTIs in the TGF-β and MAPK signaling pathways; hsa-miR-20b-5p exhibited the most MTIs in the Wnt signaling pathway. MYC and hsa-miR-34a-5p were shared between all three signaling pathways, also forming an MTI unit. JUN exhibited the most protein-protein interactions, followed by MAPK8. These in silico data support the hypothesis that intracellular zinc status plays a role in osteogenesis through the transcriptional regulation of miRNA genes via the zinc/MTF-1/MRE complex.
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