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Mwachaka PM, Gichangi P, Abdelmalek A, Odula P, Ogeng'o J. Impact of varying maternal dietary folate intake on cerebellar cortex histomorphology and cell density in offspring rats. Int J Dev Neurosci 2024; 84:406-422. [PMID: 38773676 DOI: 10.1002/jdn.10337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/26/2024] [Accepted: 05/04/2024] [Indexed: 05/24/2024] Open
Abstract
The cerebellum has a long, protracted developmental period that spans from the embryonic to postnatal periods; as a result, it is more sensitive to intrauterine and postnatal insults like nutritional deficiencies. Folate is crucial for foetal and early postnatal brain development; however, its effects on cerebellar growth and development are unknown. The aim of this study was to examine the effects of maternal folate intake on the histomorphology and cell density of the developing cerebellum. Twelve adult female rats (rattus norvegicus) were randomly assigned to one of four premixed diet groups: standard (2 mg/kg), folate-deficient (0 mg/kg), folate-supplemented (8 mg/kg) or folate supra-supplemented (40 mg/kg). The rats started their diets 14 days before mating and consumed them throughout pregnancy and lactation. On postnatal days 1, 7, 21 and 35, five pups from each group were sacrificed, and their brains were processed for light microscopic analysis. Histomorphology and cell density of the external granule, molecular, Purkinje and internal granule layers were obtained. The folate-deficient diet group had smaller, dysmorphic cells and significantly lower densities of external granule, molecular, Purkinje and internal granule cells. Although the folate-enriched groups had greater cell densities than the controls, the folate-supplemented group had considerably higher cell densities than the supra-supplemented group. The folate supra-supplemented group had ectopic Purkinje cells in the internal granule cell layer. These findings imply that a folate-deficient diet impairs cellular growth and reduces cell density in the cerebellar cortex. On the other hand, folate supplementation increases cell densities, but there appears to be an optimal dose of supplementation since excessive folate levels may be detrimental.
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Affiliation(s)
| | - Peter Gichangi
- Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Adel Abdelmalek
- Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Paul Odula
- Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Julius Ogeng'o
- Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
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2
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Han Y, Lee J, Haiping G, Kim KH, Wanxi P, Bhardwaj N, Oh JM, Brown RJC. Plant-based remediation of air pollution: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113860. [PMID: 34626947 DOI: 10.1016/j.jenvman.2021.113860] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/26/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
Humans face threats from air pollutants present in both indoor and outdoor environments. The emerging role of plants in remediating the atmospheric environment is now being actively investigated as a possible solution for this problem. Foliar surfaces of plants (e.g., the leaves of cotton) can absorb a variety of airborne pollutants (e.g., formaldehyde, benzene, trimethylamine, and xylene), thereby reducing their concentrations in indoor environments. Recently, theoretical and experimental studies have been conducted to offer better insights into the interactions between plants and the surrounding air. In our research, an overview on the role of plants in reducing air pollution (often referred to as phytoremediation) is provided based on a comprehensive literature survey. The major issues for plant-based research for the reduction of air pollution in both outdoor and indoor environments are discussed in depth along with future challenges. Analysis of the existing data confirms the effectiveness of phytoremediation in terms of the absorption and purification of pollutants (e.g., by the leaves and roots of plants and trees), while being controlled by different variables (e.g., pore characteristics and planting patterns). Although most lab-scale studies have shown that plants can effectively absorb pollutants, it is important for such studies to reflect the real-world conditions, especially with the influence of human activities. Under such conditions, pollutants are to be replenished continually while the plant surface area to ambient atmosphere volume ratio vastly decreases (e.g., relative to lab-based experiments). The replication of such experimental conditions is the key challenge in this field of research. This review is expected to offer valuable insights into the innate ability of various plants in removing diverse pollutants (such as formaldehyde, benzene, and particulate matter) under different environmental settings.
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Affiliation(s)
- Yang Han
- School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jechan Lee
- Department of Environmental and Safety Engineering & Department of Energy Systems Research, Ajou University, Suwon, 16499, South Korea
| | - Gu Haiping
- School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, 04763, South Korea.
| | - Peng Wanxi
- School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Neha Bhardwaj
- Department of Biotechnology, University Institute of Engineering Technology (UIET), Panjab University, Chandigarh, India.
| | - Jong-Min Oh
- Department of Environmental Science & Environmental Engineering, Kyung Hee University, Suwon, 17104, South Korea
| | - Richard J C Brown
- Atmospheric Environmental Science Department, National Physical Laboratory, Teddington, TW11 0LW, United Kingdom
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3
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Badrfam R, Mostafavi SA, Khaleghi A, Akhondzadeh S, Zandifar A, Farid M, Mohammadian Khonsari N, Mohammadi MR. The efficacy of vitamin B6 as an adjunctive therapy to lithium in improving the symptoms of acute mania in patients with bipolar disorder, type 1; a double-blind, randomized, placebo-controlled, clinical trial. Brain Behav 2021; 11:e2394. [PMID: 34662000 PMCID: PMC8613435 DOI: 10.1002/brb3.2394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/14/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Vitamin B6 has been linked to a variety of probable roles, including anti-inflammatory, homocysteine-lowering, serotonin-regulating, and dopamine-lowering. In this study, we investigated the possible effect of vitamin B6 on bipolar disorder in manic episode with psychotic feature in a placebo-controlled double-blind clinical trial in a psychiatric hospital. METHODS This study was performed on 50 patients who were equally divided into two groups (each group included 25 patients) using 80 mg of vitamin B6 daily or placebo. At the beginning and end of the study, they were evaluated for lab tests, inflammatory biomarkers and level of blood homocysteine. Also, at the baseline and in weeks 2, 4, and 8, they were evaluated based on the anthropometric measurements, score obtained from the Young Mania Questionnaire, Mini-Mental State Examination (MMSE), and the Pittsburgh Sleep Questionnaire. RESULTS Accordingly, based on Yang Mania scoring scale, no significant difference was observed between the two groups receiving vitamin B6 and placebo (22.68 ± 5.39 vs. 21.80 ± 5.39 [p-value = .51]). Based on MMSE, significant improvement in cognitive status was obtained in group placebo compared to vitamin B6 group (25.24 ± 1.96 vs. 24.40 ± 3.25, respectively [p-value = .01]). At the Pittsburg scale (total, there was no statistically significant difference between the two groups receiving vitamin B6 and placebo (1.04 ± 0.20 vs. 0.48 ± 0.50 [p-value = .23]). Additionally, no significant difference was observed between the two groups regarding the anthropometric status. CONCLUSIONS According to this study, the daily dose of 80 mg of vitamin B6 for 8 weeks in patients with bipolar disorder in the manic episode with psychotic feature treated daily with lithium, was not associated with a significant improvement in mood status compared to the control-placebo group. It is recommended to perform similar studies in a multi-center manner with a larger sample size and longer duration.
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Affiliation(s)
- Rahim Badrfam
- Psychiatry and Psychology Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran.,Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed-Ali Mostafavi
- Psychiatry and Psychology Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Khaleghi
- Psychiatry and Psychology Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahin Akhondzadeh
- Psychiatry and Psychology Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Atefeh Zandifar
- Social Determinants of Health Research Center, Alborz University of Medical Sciences, Karaj, Iran.,Department of Psychiatry, Imam Hossein Hospital, Alborz University of Medical Sciences, Karaj, Iran
| | - Malihe Farid
- Non communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | | | - Mohammad Reza Mohammadi
- Psychiatry and Psychology Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
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4
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El-Borm HT, Abd El-Gaber AS. Effect of prenatal exposure of green tea extract on the developing central nervous system of rat fetuses; histological, immune-histochemical and ultrastructural studies. Saudi J Biol Sci 2021; 28:4704-4716. [PMID: 34354458 PMCID: PMC8324952 DOI: 10.1016/j.sjbs.2021.04.084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 11/26/2022] Open
Abstract
Although, several health benefits were associated with green tea, these effects may be beneficial up to a certain dose. Higher doses of green tea may cause several adverse effects. So, there is a need to test the potential negative effects of green tea during pregnancy. This study was designated to evaluate the effect of prenatal exposure of green tea extract on the development of the central nervous system of 20-day old rat fetuses. The pregnant rats were divided into 4 groups; the control group (received distal water) and the other 3 groups received green tea extract at different doses (200, 600 & 1000 mg/kg/day, respectively) from the 6th to 15th day of gestation i.e., during the organogenesis phase of development. Cerebral cortex, cerebellum and spinal cord specimens were subjected to histological, immunohistochemical and ultrastructure investigations. The body weight of both mothers and fetuses was significantly decreased in the groups that received 600 and 1000 mg green tea extract. Also, the neuronal tissues displayed various signs of degeneration which were evident with the 600 and 1000 mg doses. Green tea extract also increases the glial fibrillary acidic protein (GFAP) and decreases the proliferating cell nuclear antigen (PCNA) which were directly proportional with increasing the dose. Administration of green tea extract during rat organogenesis period induced various histological, immunohistochemical and ultrastructural degenerative changes in the cerebral cortex, cerebellum and spinal cord of 20-day old rat fetuses. These deleterious changes were directly proportional to increasing the green tea extract dose. Thus, it should be stressed that the effect of green tea is dose-dependent and therefore it can be either beneficial or adverse.
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Key Words
- (CNS), Central nervous system
- (CP), cortical plate
- (EGCG), Epigallocatechin-3-gallate
- (GFAP), Glial fibrillary acidic protein
- (GTE), Green tea extract
- (IZ), Intermediate zone
- (MZ), marginal zone
- (PCNA), Proliferating cell nuclear antigen
- (SVZ), Subventricular zone
- (VZ), ventricular zone
- CNS
- GFAP
- Green tea
- Organogenesis
- PCNA
- Ultrastructure
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Affiliation(s)
- Hend T El-Borm
- Lecturer of Vertebrates, Comparative Anatomy and Embryology-Zoology Department-Faculty of Science-Menoufia University, Egypt
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5
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Seelan RS, Mukhopadhyay P, Philipose J, Greene RM, Pisano MM. Gestational folate deficiency alters embryonic gene expression and cell function. Differentiation 2020; 117:1-15. [PMID: 33302058 DOI: 10.1016/j.diff.2020.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 11/04/2020] [Accepted: 11/23/2020] [Indexed: 12/25/2022]
Abstract
Folic acid is a nutrient essential for embryonic development. Folate deficiency can cause embryonic lethality or neural tube defects and orofacial anomalies. Folate receptor 1 (Folr1) is a folate binding protein that facilitates the cellular uptake of dietary folate. To better understand the biological processes affected by folate deficiency, gene expression profiles of gestational day 9.5 (gd9.5) Folr1-/- embryos were compared to those of gd9.5 Folr1+/+ embryos. The expression of 837 genes/ESTs was found to be differentially altered in Folr1-/- embryos, relative to those observed in wild-type embryos. The 837 differentially expressed genes were subjected to Ingenuity Pathway Analysis. Among the major biological functions affected in Folr1-/- mice were those related to 'digestive system development/function', 'cardiovascular system development/function', 'tissue development', 'cellular development', and 'cell growth and differentiation', while the major canonical pathways affected were those associated with blood coagulation, embryonic stem cell transcription and cardiomyocyte differentiation (via BMP receptors). Cellular proliferation, apoptosis and migration were all significantly affected in the Folr1-/- embryos. Cranial neural crest cells (NCCs) and neural tube explants, grown under folate-deficient conditions, exhibited marked reduction in directed migration that can be attributed, in part, to an altered cytoskeleton caused by perturbations in F-actin formation and/or assembly. The present study revealed that several developmentally relevant biological processes were compromised in Folr1-/- embryos.
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Affiliation(s)
- R S Seelan
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development & Anomalies, University of Louisville Dental School, 501 S. Preston St., Louisville, KY, 40292, USA
| | - P Mukhopadhyay
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development & Anomalies, University of Louisville Dental School, 501 S. Preston St., Louisville, KY, 40292, USA
| | - J Philipose
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development & Anomalies, University of Louisville Dental School, 501 S. Preston St., Louisville, KY, 40292, USA
| | - R M Greene
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development & Anomalies, University of Louisville Dental School, 501 S. Preston St., Louisville, KY, 40292, USA.
| | - M M Pisano
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development & Anomalies, University of Louisville Dental School, 501 S. Preston St., Louisville, KY, 40292, USA
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Folate Insufficiency Due to MTHFR Deficiency Is Bypassed by 5-Methyltetrahydrofolate. J Clin Med 2020; 9:jcm9092836. [PMID: 32887268 PMCID: PMC7564482 DOI: 10.3390/jcm9092836] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/21/2020] [Accepted: 08/31/2020] [Indexed: 12/14/2022] Open
Abstract
Adequate levels of folates are essential for homeostasis of the organism, prevention of congenital malformations, and the salvage of predisposed disease states. They depend on genetic predisposition, and therefore, a pharmacogenetic approach to individualized supplementation or therapeutic intervention is necessary for an optimal outcome. The role of folates in vital cell processes was investigated by translational pharmacogenetics employing lymphoblastoid cell lines (LCLs). Depriving cells of folates led to reversible S-phase arrest. Since 5,10-methylenetetrahydrofolate reductase (MTHFR) is the key enzyme in the biosynthesis of an active folate form, we evaluated the relevance of polymorphisms in the MTHFR gene on intracellular levels of bioactive metabolite, the 5-methyltetrahydrofolate (5-Me-THF). LCLs (n = 35) were divided into low- and normal-MTHFR activity groups based on their genotype. They were cultured in the presence of folic acid (FA) or 5-Me-THF. Based on the cells’ metabolic activity and intracellular 5-Me-THF levels, we conclude supplementation of FA is sufficient to maintain adequate folate level in the normal MTHFR activity group, while low MTHFR activity cells require 5-Me-THF to overcome the metabolic defects caused by polymorphisms in their MTHFR genes. This finding was supported by the determination of intracellular levels of 5-Me-THF in cell lysates by LC-MS/MS. FA supplementation resulted in a 2.5-fold increase in 5-Me-THF in cells with normal MTHFR activity, but there was no increase after FA supplementation in low MTHFR activity cells. However, when LCLs were exposed to 5-Me-THF, a 10-fold increase in intracellular levels of this metabolite was determined. These findings indicate that patients undergoing folate supplementation to counteract anti-folate therapies, or patients with increased folate demand, would benefit from pharmacogenetics-based therapy choices.
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7
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Liu XZ, Zhang Q, Jiang Q, Bai BL, Du XJ, Wang F, Wu LH, Lu XL, Bao YH, Li HL, Zhang T. Genetic screening and functional analysis of CASP9 mutations in a Chinese cohort with neural tube defects. CNS Neurosci Ther 2018; 24:394-403. [PMID: 29365368 DOI: 10.1111/cns.12797] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 12/09/2017] [Accepted: 12/13/2017] [Indexed: 01/01/2023] Open
Abstract
AIM Neural tube defects (NTDs) are birth defects of the nervous system and are the second most frequent cause of birth defects worldwide. The etiology of NTDs is complicated and involves both genetic and environmental factors. CASP9 is an initiator caspase in the intrinsic apoptosis pathway, which in Casp9-/- mice has been shown to result in NTDs because of decreased apoptosis. The aim of this study was to evaluate the potential genetic contribution of the CASP9 gene in human NTDs. METHODS High-throughput sequencing was performed to screen genetic variants of CASP9 genes in 355 NTD cases and 225 matched controls. Apoptosis-relevant assays were performed on transiently transfected E9 neuroepithelial cells or human embryonic kidney 293T cells, to determine the functional characteristics of NTD-specific rare variants under complete or low folic acid (FA) status. RESULTS We found significant expression of CASP9 rare variants in NTDs and identified 4 NTD-specific missense variants. Functional assays demonstrated that a p.Y251C variant attenuates apoptosis by reducing CASP9 protein expression and decreasing activity of the intrinsic apoptosis pathway. From this, we conclude that this variant may represent a loss-of-function mutation. A 4-time recurrent p.R191G variant did not affect intrinsic apoptosis in complete medium, while it completely inhibited apoptosis induced by low FA medium. CONCLUSION Our findings identify a genetic link for apoptosis in human NTDs and highlight the effect of gene-environment interactions in a complex disease.
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Affiliation(s)
- Xiao-Zhen Liu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China.,Graduate School, Peking Union Medical College, Beijing, China
| | - Qin Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Qian Jiang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Bao-Ling Bai
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiao-Juan Du
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Fang Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Li-Hua Wu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiao-Lin Lu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Yi-Hua Bao
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Hui-Li Li
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Ting Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China.,Graduate School, Peking Union Medical College, Beijing, China
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8
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Kobus-Bianchini K, Bourckhardt GF, Ammar D, Nazari EM, Müller YMR. Homocysteine-induced changes in cell proliferation and differentiation in the chick embryo spinal cord: implications for mechanisms of neural tube defects (NTD). Reprod Toxicol 2017; 69:167-173. [PMID: 28242235 DOI: 10.1016/j.reprotox.2017.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 02/10/2017] [Accepted: 02/21/2017] [Indexed: 02/08/2023]
Abstract
Maternal hyperhomocysteinemia during pregnancy is associated with increased risk of NTD in the offspring. Our study investigated the effects of homocysteine (Hcy) on proliferation and neuronal differentiation of the spinal cord cells in a chick embryo model. Embryos were treated with 20μmol D-L Hcy/50μL saline solution at embryonic day 2 (E2) and analyzed at embryonic days 4 (E4) and 6 (E6). Control embryos received exclusively 50μL saline solution. We performed immunolocalization and flow cytometry analyses using antibodies anti-phosphohistone H3 (pH3), anti-proliferating cell nuclear antigen (PCNA), anti-β-tubulin III and anti-p53. Our results revealed that Hcy interferes in the proliferation of the neural cells, and that this effect is age-dependent and differed between Hcy-treated embryos with and without NTD. Also, Hcy induced a decrease of neuronal differentiation in the spinal cord at both embryonic ages. These findings contribute to clarifying the cellular bases of NTD genesis, under experimental hiperhomocysteinemia.
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Affiliation(s)
- Karoline Kobus-Bianchini
- Departamento de Fisioterapia, Centro de Ciências da Saúde e do Esporte, UDESC, Rua Pascoal Simone 358, Coqueiros, Florianópolis, SC, 88080-350, Brazil; Centro Universitário Estácio de Sá Santa Catarina, Avenida Leoberto Leal 431, São José, SC, 88117-001, Brazil.
| | - Gilian Fernando Bourckhardt
- Programa de Pós-graduação em Biologia Celular e do Desenvolvimento, Centro de Ciências Biológicas, UFSC, Campus Universitário, Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Dib Ammar
- Centro Universitário Católica de Santa Catarina, Rua Visconde de Taunay 427, Centro, Joinville, SC, 89203-005, Brazil
| | - Evelise Maria Nazari
- Programa de Pós-graduação em Biologia Celular e do Desenvolvimento, Centro de Ciências Biológicas, UFSC, Campus Universitário, Trindade, Florianópolis, SC, 88040-900, Brazil; Departamento de Biologia Celular, Embriologia e Genética, Centro de Ciências Biológicas, UFSC, Campus Universitário, Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Yara Maria Rauh Müller
- Programa de Pós-graduação em Biologia Celular e do Desenvolvimento, Centro de Ciências Biológicas, UFSC, Campus Universitário, Trindade, Florianópolis, SC, 88040-900, Brazil; Departamento de Biologia Celular, Embriologia e Genética, Centro de Ciências Biológicas, UFSC, Campus Universitário, Trindade, Florianópolis, SC, 88040-900, Brazil
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9
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Wang D, Chen YM, Ruan MH, Zhou AH, Qian Y, Chen C. Homocysteine inhibits neural stem cells survival by inducing DNA interstrand cross-links via oxidative stress. Neurosci Lett 2016; 635:24-32. [DOI: 10.1016/j.neulet.2016.10.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 10/13/2016] [Accepted: 10/19/2016] [Indexed: 01/14/2023]
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10
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Folate deprivation induces cell cycle arrest at G0/G1 phase and apoptosis in hippocampal neuron cells through down-regulation of IGF-1 signaling pathway. Int J Biochem Cell Biol 2016; 79:222-230. [DOI: 10.1016/j.biocel.2016.08.040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/26/2016] [Accepted: 08/29/2016] [Indexed: 02/06/2023]
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11
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Low-Dose Homocystine Enhances Proliferation and Migration of Bv2 Microglia Cells. Cell Mol Neurobiol 2016; 36:1279-1289. [PMID: 26825574 DOI: 10.1007/s10571-015-0325-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/23/2015] [Indexed: 02/06/2023]
Abstract
Homocysteine (Hcy) is a non-essential amino acid that is derived from the breakdown of dietary methionine. Hyperhomocysteinemia (HHcy) is an independent risk factor for a variety of chronic diseases, especially neurodegenerative conditions. To better understand the role of HHcy in the pathogenesis of neurodegenerative disorders, we investigated the effect of Hcy on the proliferation and activation of microglia Bv2 cells. Cells were treated with six different Hcy concentrations: 0, 50, 100, 300, 500, and 1000 µM for different time periods (8, 12, 16, 24, and 48 h). The morphology of Bv2 cells was observed, and cell activity and proliferation were detected. Cell migration and secretion of pro-inflammatory cytokines were detected by the scratch wound assay, the transwell assay, and ELISA, respectively. The effect of Hcy on Bv2 proliferation occurred earlier (<24 h, especially 16 h) after treatment with concentrations between 100 and 300 μM, and there was no cytotoxicity to Bv2 cells. Meanwhile, functional assays suggested that Hcy not only promoted Bv2 secretion of the pro-inflammatory cytokines IL-1β, TNF-α, and IL-6, but also enhanced Bv2 migration and invasion, with 100 μM being the most effective concentration. In summary, Bv2 proliferation and activation can be promoted by short-term treatment with low-dose Hcy.
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12
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Hirako A, Sun J, Furukawa S, Takeuchi T, Sugiyama A. Effect of methotrexate on rostral migratory stream in newborn rats. J Vet Med Sci 2015; 77:1565-71. [PMID: 26136044 PMCID: PMC4710711 DOI: 10.1292/jvms.15-0280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Two-day-old rats were treated with subcutaneous injections of methotrexate (MTX) 5 mg/kg
and 150 mg/kg, and their rostral migratory streams (RMS) were examined time-dependently.
MTX treatment increased pyknotic and TUNEL-positive cells and decreased mitotic and
phospho-Histone H3-positive cells at almost all time points in the vertical arm, elbow and
horizontal arm regions of the RMS. There were more TUNEL-positive cells ratio in the MTX
150 mg/kg group than in the MTX 5 mg/kg group. Treatment with MTX 150 mg/kg decreased the
cellularity in the vertical arm region on Postnatal day (PD) 4, but that with the MTX 5
mg/kg did not. TUNEL-positive cells ratio was the highest in the vertical arm region,
followed by elbow and horizontal regions in both MTX-treated groups. TUNEL-positive cells
ratio in the vertical arm and elbow regions reached their peaks on PD 4 in both
MTX-treated groups, and both MTX-treatments significantly decreased Phospho-Histone
H3-positive cells ratio on PDs 2.5 and 3 in the vertical arm, elbow and horizontal arm
regions. The phospho-Histone H3-positive cells ratio in the vertical arm region recovered
on PD4 in the MTX 150 mg/kg group. These findings suggested that RMS required a great
amount of folic acid on PD 2 and that the folic acid-requirement differed depending on the
anatomical region of the RMS. To our knowledge, this is the first report demonstrating the
effect of MTX on the RMS and the necessity of the folic acid metabolism on RMS development
in newborn rats.
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Affiliation(s)
- Ayano Hirako
- Department of Veterinary Laboratory Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Minami 4-101 Koyama-cho, Tottori, Tottori 680-8553, Japan
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13
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The role of folate metabolism in orofacial development and clefting. Dev Biol 2015; 405:108-22. [PMID: 26144049 DOI: 10.1016/j.ydbio.2015.07.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 05/29/2015] [Accepted: 07/01/2015] [Indexed: 11/23/2022]
Abstract
Folate deficiency has been associated with numerous diseases and birth defects including orofacial defects. However, whether folate has a role in the face during early orofacial development has been unclear. The present study reveals that pharmacological and antisense oligonucleotide mediated inhibition of DHFR, an integral enzyme in the folate pathway, results in specific changes in the size and shape of the midface and embryonic mouth. Such defects are accompanied by a severe reduction in the muscle and cartilage jaw elements without significant change in neural crest pattern or global levels of methylation. We propose that the orofacial defects associated with DHFR deficient function are the result of decreased cell proliferation and increased cell death via DNA damage. In particular, localized apoptosis may also be depleting the cells of the face that express crucial genes for the differentiation of the jaw structures. Folate supplementation is widely known to reduce human risk for orofacial clefts. In the present study, we show that activating folate metabolism can reduce median oral clefts in the primary palate by increasing cell survival. Moreover, we demonstrate that a minor decrease in DHFR function exacerbates median facial clefts caused by RAR inhibition. This work suggests that folate deficiencies could be a major contributing factor to multifactorial orofacial defects.
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Halder D, Mandal C, Lee BH, Lee JS, Choi MR, Chai JC, Lee YS, Jung KH, Chai YG. PCDHB14- and GABRB1-like nervous system developmental genes are altered during early neuronal differentiation of NCCIT cells treated with ethanol. Hum Exp Toxicol 2015; 34:1017-27. [PMID: 25566775 DOI: 10.1177/0960327114566827] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Ethanol (EtOH) exposure during embryonic development causes dysfunction of the central nervous system (CNS). Here, we examined the effects of chronic EtOH on gene expression during early stages of neuronal differentiation. Human embryonic carcinoma (NCCIT) cells were differentiated into neuronal precursors/lineages in the presence or absence of EtOH and folic acid. Gene expression profiling and pathway analysis demonstrated that EtOH deregulates many genes and pathways that are involved in early brain development. EtOH exposure downregulated several important genes, such as PCDHB14, GABRB1, CTNND2, NAV3, RALDH1, and OPN5, which are involved in CNS development, synapse assembly, synaptic transmission, and neurotransmitter receptor activity. GeneGo pathway analysis revealed that the deregulated genes mapped to disease pathways that were relevant to fetal alcohol spectrum disorders (FASD, such as neurotic disorders, epilepsy, and alcohol-related disorders). In conclusion, these findings suggest that the impairment of the neurological system or suboptimal synapse formation resulting from EtOH exposure could underlie the neurodevelopmental disorders in individuals with FASD.
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Affiliation(s)
- D Halder
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea
| | - C Mandal
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea
| | - B H Lee
- Department of Psychiatry, Gangnam Eulji Hospital, Eulji University, Seoul, Republic of Korea KARF Hospital, the Korean Alcohol Research Foundation, Goyang, Republic of Korea
| | - J S Lee
- KARF Hospital, the Korean Alcohol Research Foundation, Goyang, Republic of Korea
| | - M R Choi
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea
| | - J C Chai
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea
| | - Y S Lee
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea
| | - K H Jung
- Institute of Natural Science and Technology, Hanyang University, Ansan, Republic of Korea
| | - Y G Chai
- Department of Molecular and Life Sciences, Hanyang University, Ansan, Republic of Korea Department of Nanobiotechnology, Hanyang University, Seoul, Republic of Korea
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Lin N, Qin S, Luo S, Cui S, Huang G, Zhang X. Homocysteine induces cytotoxicity and proliferation inhibition in neural stem cells via DNA methylation in vitro. FEBS J 2014; 281:2088-96. [PMID: 24612628 DOI: 10.1111/febs.12764] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 01/12/2014] [Accepted: 02/20/2014] [Indexed: 11/29/2022]
Abstract
Mild to moderate hyperhomocysteinemia has been implicated in neurodevelopmental disorders and neurodegenerative diseases in human studies. Although the molecular mechanisms underlying the effects of homocysteine (Hcy) neurotoxicity on the nervous system are not yet fully understood, inhibition of neural stem cell (NSC) proliferation and alterations in DNA methylation may be involved. The aim of the present study was to characterize the effects of Hcy on DNA methylation in NSCs, and to explore how Hcy-induced changes in DNA methylation patterns affect NSC proliferation. We found that D,L-Hcy (30-1000 μm) but not L-cysteine inhibited cell proliferation and reduced levels of global DNA methylation in NSCs from neonatal rat hippocampus and increased cell injury. High levels of Hcy also induced an increase in S-adenosylhomocysteine (SAH), a decrease in the ratio of S-adenosylmethionine (SAM) to SAH, and a reduction in protein expression of the DNA methyltransferases DNMT1, DNMT3a and DNMT3b and their enzymatic activity. Moreover, the DNMT inhibitor zebularine reduced the global DNA methylation level and inhibited NSC proliferation. Our results suggest that alterations in DNA methylation may be an important mechanism by which high levels of Hcy inhibit NSC viability in vitro. Hcy-induced DNA hypomethylation may be caused by a reduction in the DNMT activity which is regulated by the cellular concentrations of SAM and SAH, or their protein expression levels. Our results also suggest that Hcy may play a role in the pathogenesis of certain nervous system diseases via a molecular mechanism that involves negative regulation of NSC proliferation and alterations in DNA methylation.
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Affiliation(s)
- Ningning Lin
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, China
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16
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Yan H, Zhang X, Luo S, Liu H, Wang X, Gao Y, Wilson JX, Huang G. Effects of homocysteine on ERK signaling and cell proliferation in fetal neural stem cells in vitro. Cell Biochem Biophys 2013; 66:131-7. [PMID: 23109178 DOI: 10.1007/s12013-012-9461-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aim of the present study was to determine if the excitatory amino acid homocysteine (Hcy) alters ERK signaling and cell proliferation in fetal neural stem cells (NSCs) in vitro. NSCs were isolated from fetal rats and grown in serum-free suspension medium. The cells were identified as NSCs by their expression of immunoreactive Sox2. NSCs were assigned to one of four treatment groups: vehicle control, low-dose Hcy group (Hcy-L, medium contained 30 μmol/L Hcy), middle-dose Hcy group (Hcy-M, 100 μmol/L Hcy) and high-dose Hcy group (Hcy-H, 300 μmol/L Hcy). Cell proliferation was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Protein expression levels of ERK1/2 and phosphorylated ERK1/2 were detected by Western blot. The effects of Hcy on NSC death, including apoptosis, were assessed by using flow cytometry and trypan blue exclusion. The results showed that NSCs grew as neurospheres in the serum-free medium. Hcy decreased ERK1/2 protein phosphorylation and NSC proliferation, but it did not induce cell death or apoptosis within the concentration from 30 to 300 μmol/L. The above results are consistent with the hypothesis that Hcy decreases fetal NSC proliferation by inhibiting ERK signaling.
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Affiliation(s)
- Hai Yan
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
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Dai C, Zhang B, Liu X, Guo K, Ma S, Cai F, Yang Y, Yao Y, Feng M, Bao X, Deng K, Jiao Y, Wei Z, Junji W, Xing B, Lian W, Wang R. Pyrimethamine sensitizes pituitary adenomas cells to temozolomide through cathepsin B-dependent and caspase-dependent apoptotic pathways. Int J Cancer 2013; 133:1982-93. [PMID: 23564480 DOI: 10.1002/ijc.28199] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 03/19/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Congxin Dai
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Bo Zhang
- Department of Neurosurgery; The First Affiliated Hospital of Dalian Medical University; Dalian; Liaoning; People's Republic of China
| | - Xiaohai Liu
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Kai Guo
- Department of Neurosurgery; The First Affiliated Hospital of Dalian Medical University; Dalian; Liaoning; People's Republic of China
| | - Sihai Ma
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Feng Cai
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Yakun Yang
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Yong Yao
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Ming Feng
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Xinjie Bao
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Kan Deng
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Yonghui Jiao
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Zhenqing Wei
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Wei Junji
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Bing Xing
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Wei Lian
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
| | - Renzhi Wang
- Department of Neurosurgery; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing; People's Republic of China
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18
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Mechanism of folate deficiency-induced apoptosis in mouse embryonic stem cells: Cell cycle arrest/apoptosis in G1/G0 mediated by microRNA-302a and tumor suppressor gene Lats2. Int J Biochem Cell Biol 2012; 44:1750-60. [PMID: 22828209 DOI: 10.1016/j.biocel.2012.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 07/09/2012] [Accepted: 07/16/2012] [Indexed: 11/19/2022]
Abstract
Deficiencies in maternal diet, such as inadequate intake of folate, can inhibit normal development and lead to developmental defects. MicroRNAs (miRNAs) may play a role in mediating the effects of folate deficiency in the growing mammalian embryo, although conclusive evidences to support that possibility are not yet available. The goal of the present study was to investigate whether and how folate deprivation alters the properties of mouse embryonic stem cells (mESCs) in culture. For this purpose, mESCs were cultured in folate-deficient or complete culture medium. The results show that folate-deficient mESCs have a significantly higher rate of apoptosis, accumulate in G0/G1 and fail to proliferate. Expression profiling revealed several miRs and many mRNAs are differently expressed in folate-deficient cells. RT-PCR data confirmed differential expressions of 12 miRNAs in folate-deficient cells. Furthermore, bioinformatics analyses and in vitro studies suggested that miR-302a plays a critical role in mediating the effects of folate on cell proliferation and cell cycle-specific apoptosis by targeting Lats2 gene. Together, these results suggest that the effects of folate deficiency on mammalian development may be mediated by miRNAs that regulate proliferation and/or cell cycle progression in ESCs.
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Xie H, Guo J, Wang J, Wang F, Zhao H, Liu C, Wang L, Lu X, Wu L, Bao Y, Zou J, Zhang T, Niu B. Glutamate carboxypeptidase II gene polymorphisms and neural tube defects in a high-risk Chinese population. Metab Brain Dis 2012; 27:59-65. [PMID: 22124883 DOI: 10.1007/s11011-011-9272-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 11/08/2011] [Indexed: 11/27/2022]
Abstract
Glutamate carboxypeptidase II (GCPII) catalyzes the hydrolysis of N-acetylaspartylglutamate into N-acetylaspartate and glutamate in the brain. Animal experiments suggested that GCPII plays an essential role in early embryonic development. Previous studies provided conflicting results on the effect of the GCPII rs61886492 C>T (or 1561C>T) polymorphism on NTDs. In the Lvliang area of Shanxi province, where the incidence of NTDs is the highest in China, a case-control study was conducted to investigate possible association between the GCPII rs61886492 and rs202676 polymorphisms and NTD risk. Results indicated all the case and control samples displayed the rs61886492 GG genotype. Although no significant differences in rs202676 genotype or allele frequencies were found between the NTD and control groups, the combined AG+GG genotype group was significantly associated with anencephaly (p = 0.03, OR = 2.11, 95% CI, 1.11-4.01), but not with spina bifida or encephalocele. Overall, the rs202676 A>G polymorphism is a potential risk factor for anencephaly. The results of this study suggest that phenotypic heterogeneity may exist among NTDs in this Chinese population.
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Affiliation(s)
- Hua Xie
- Capital Institute of Pediatrics, Beijing 100020, People's Republic of China
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20
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Massoud AA, El-Atrash A, Tousson E, Ibrahim W, Abou-Harga H. Light and ultrastructural study in the propylthiouracil-induced hypothyroid rat heart ventricles and the ameliorating role of folic acid. Toxicol Ind Health 2012; 28:262-70. [PMID: 22331425 DOI: 10.1177/0748233711410915] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Thyroid hormones have marked effects on the growth, development, and metabolic function of virtually all organs and tissues. Thyroid status is an important determinant of cardiovascular function. The present work studied the histopathological and ultrastructural changes in the hypothyroid rat left ventricle at post-pubertal stage, in addition to the ameliorating role of folic acid. A total of 50 male albino rats were randomly divided into 5 groups (group I, control; group II, folic acid; group III, propylthiouracil-induced hypothyroid rats; group IV, co-treatment with folic acid; group V, post-treatment). In order to ensure the hypothyroid state, the level of serum triiodothyronine (T(3)) and thyroid stimulating hormone (TSH) through the dose period was regularly determined. The TSH levels were significantly higher while T(3) levels were significantly lower in hypothyroid rats when compared to control group. The high-performance liquid chromatography analysis showed an increase in homocysteine (Hcy) in the hypothyroid rats group when compared to the control group. The histopathological studies of the ventricle in hypothyroid rats revealed hydrophobic changes in myofibrillar structure with striations, myocardial atrophy, nuclear pyknosis, cytoplasmic vacuoles, and cytoplasmic eosinophilia. Transmission electron micrographs in the myocardium of hypothyroid rats revealed a marked reduction in muscle fibre mass, a marked degeneration of muscle fibres, swollen mitochondria, dilated sarcoplasmic reticulum and more prominent perinuclear oedema observed in the cardiac myocytes. In co-treated hypothyroid rats with folic acid, a regular arrangement of muscle fibres, mild swelling of myofibrillar structure with striations and no continuity with adjacent myofibrils were observed while the post-treated hypothyroid rat with folic acid showed normal architecture of myofibrillar structure with striations and continuity with adjacent myofibrils. In conclusion, our results indicated that folic acid had ameliorative effect against cardiac damage induced by 6-n-propyl-2-thiouracil and the best results were found in case of using the folic acid as an adjuvant therapy after returning to the euthyroid state.
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Affiliation(s)
- Ahmed A Massoud
- Department of Zoology, Faculty of Science, Tanta University, Tanta, Egypt
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21
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Champier J, Claustrat F, Nazaret N, Montange MF, Claustrat B. Folate depletion changes gene expression of fatty acid metabolism, DNA synthesis, and circadian cycle in male mice. Nutr Res 2012; 32:124-32. [DOI: 10.1016/j.nutres.2011.12.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 12/20/2011] [Accepted: 12/28/2011] [Indexed: 11/16/2022]
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22
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Sain H, Sharma B, Jaggi AS, Singh N. Pharmacological investigations on potential of peroxisome proliferator-activated receptor-gamma agonists in hyperhomocysteinemia-induced vascular dementia in rats. Neuroscience 2011; 192:322-33. [PMID: 21777659 DOI: 10.1016/j.neuroscience.2011.07.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Revised: 06/17/2011] [Accepted: 07/04/2011] [Indexed: 12/25/2022]
Abstract
The present study has been designed to investigate the potential of peroxisome proliferator-activated receptor-gamma ([PPAR]-γ) agonists, pioglitazone, and rosiglitazone in hyperhomocysteinemia-induced vascular dementia of rats. l-methionine was administered for 8 weeks to induce hyperhomocysteinemia and associated vascular dementia. Pioglitazone and rosiglitazone were administered to l-methionine-treated rats for 4 weeks (starting from 5th to 8th weeks of methionine treatment). Donepezil served as a positive control in this study. On 52nd day onward, the animals were exposed to Morris water maze (MWM) for testing learning and memory abilities. Vascular endothelial function, serum nitrite/nitrate levels, brain thiobarbituric acid reactive species (TBARS), brain reduced glutathione (GSH) levels, and brain acetylcholinesterase (AChE) activity were also measured. l-methionine-treated animals have shown impairment of learning, memory, endothelial function, decrease in serum nitrite/nitrate levels, and brain GSH levels along with increase in brain TBARS levels and AChE activity. Pioglitazone, rosiglitazone, and donepezil significantly improved hyperhomocysteinemia-induced impairment of learning, memory, endothelial dysfunction, and changes in various biochemical parameters. It is concluded that pioglitazone and rosiglitazone may be considered as potential pharmacological agents for the management of hyperhomocysteinemia-induced vascular dementia.
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Affiliation(s)
- H Sain
- Pharmacology Division, Department of Pharmaceutical Sciences and Drug Research, Faculty of Medicine, Punjabi University, Patiala-147002, Punjab, India
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