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Neural tube defect and folic acid

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https://www.readbyqxmd.com/read/29777755/folic-acid-and-primary-prevention-of-neural-tube-defects-a-review
#1
REVIEW
Jan D van Gool, Herbert Hirche, Hildegard Lax, Luc De Schaepdrijver
With 4 mg folic acid daily, it may take 20 weeks to reach red-blood-cell folate levels between 1,050 and 1,340 nmol/L, optimal for reduction of the neural tube defect risk. Therefore, folic acid supplementation should be started 5-6 months before conception. The residual risk with optimal red-blood-cell folate levels is reportedly 4.5 per 10,000 total births. The residual risk in pooled data from countries with mandatory folic acid fortification is 7.5 per 10,000 pregnancies, regardless of pre-fortification rates...
May 16, 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29767673/modeling-the-impact-of-folic-acid-fortification-and-supplementation-on-red-blood-cell-folate-concentrations-and-predicted-neural-tube-defect-risk-in-the-united-states-have-we-reached-optimal-prevention
#2
Krista S Crider, Yan Ping Qi, Owen Devine, Sarah C Tinker, Robert J Berry
Background: The US CDC and the Institute of Medicine recommend that women capable of becoming pregnant consume ≥400 µg synthetic folic acid/d to prevent neural tube defects (NTDs). The United States has 3 sources of folic acid: fortified enriched cereal grain products (ECGPs), fortified ready-to-eat (RTE) cereals, and dietary supplements. Objective: Our objectives were as follows: 1) to estimate the usual daily folic acid intake and distributions of red blood cell (RBC) folate concentrations among women consuming folic acid from different sources; 2) to assess the usual daily total folic acid intake associated with optimal RBC folate concentrations for NTD prevention; 3) to predict NTD prevalence; and 4) to estimate the number of preventable folate-sensitive NTDs...
May 14, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29732722/network-correlation-analysis-revealed-potential-new-mechanisms-for-neural-tube-defects-beyond-folic-acid
#3
Xiaoya Gao, Richard H Finnell, Hongyan Wang, Yufang Zheng
BACKGROUND: Neural tube defects (NTDs) are clinically significant congenital malformations which are known to be folic acid (FA) responsive, such that supplementation significantly reduces the prevalence of NTDs. Nonetheless, some individuals fail to respond to FA supplementation; hence NTDs remain a significant public health concern. The mechanisms that underlie the beneficial effects of FA supplementation remain poorly understood. Mouse models have been used extensively to study the mechanisms driving neural tube closure (NTC)...
May 6, 2018: Birth Defects Research
https://www.readbyqxmd.com/read/29713643/magnitude-of-neural-tube-defects-and-associated-risk-factors-at-three-teaching-hospitals-in-addis-ababa-ethiopia
#4
Abel Gedefaw, Sisay Teklu, Birkneh Tilahun Tadesse
There is scarcity of data on prevalence of neural tube defects (NTDs) in lower-income countries. Local data are important to understand the real burden of the problem and explore risk factors to design and implement preventive approaches. This study aimed to determine prevalence and risk factors of NTDs. A hospital-based cross-sectional and unmatched case-control study was conducted at three teaching hospitals of Addis Ababa University. NTDs were defined as cases of anencephaly, spina bifida, and encephalocele based on ICD-10 criteria...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29681089/genetic-variation-in-biotransformation-enzymes-air-pollution-exposures-and-risk-of-spina-bifida
#5
Amy M Padula, Wei Yang, Kathleen Schultz, Fred Lurmann, S Katharine Hammond, Gary M Shaw
Spina bifida is a birth defect characterized by incomplete closure of the embryonic neural tube. Genetic factors as well as environmental factors have been observed to influence risks for spina bifida. Few studies have investigated possible gene-environment interactions that could contribute to spina bifida risk. The aim of this study is to examine the interaction between gene variants in biotransformation enzyme pathways and ambient air pollution exposures and risk of spina bifida. We evaluated the role of air pollution exposure during pregnancy and gene variants of biotransformation enzymes from bloodspots and buccal cells in a California population-based case-control (86 cases of spina bifida and 208 non-malformed controls) study...
May 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29668043/folate-deficiency-increases-chromosomal-damage-and-mutations-in-hematopoietic-cells-in-the-transgenic-mutamouse-model
#6
Danielle P LeBlanc, Nathalie A Behan, Jason M O'Brien, Francesco Marchetti, Amanda J MacFarlane
Folate deficiency causes megaloblastic anemia and neural tube defects, and is also associated with some cancers. In vitro, folate deficiency increases mutation frequency and genome instability, as well as exacerbates the mutagenic potential of known environmental mutagens. Conversely, it remains unclear whether or not elevated folic acid (FA) intakes are beneficial or detrimental to the induction of DNA mutations and by proxy human health. We used the MutaMouse transgenic model to examine the in vivo effects of FA deficient, control, and supplemented diets on somatic DNA mutant frequency (MF) and genome instability in hematopoietic cells...
April 18, 2018: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29666258/formate-rescues-neural-tube-defects-caused-by-mutations-in-slc25a32
#7
Jimi Kim, Yunping Lei, Jin Guo, Sung-Eun Kim, Bogdan J Wlodarczyk, Robert M Cabrera, Ying Linda Lin, Torbjorn K Nilsson, Ting Zhang, Aiguo Ren, Linlin Wang, Zhengwei Yuan, Yu-Fang Zheng, Hong-Yan Wang, Richard H Finnell
Periconceptional folic acid (FA) supplementation significantly reduces the prevalence of neural tube defects (NTDs). Unfortunately, some NTDs are FA resistant, and as such, NTDs remain a global public health concern. Previous studies have identified SLC25A32 as a mitochondrial folate transporter (MFT), which is capable of transferring tetrahydrofolate (THF) from cellular cytoplasm to the mitochondria in vitro. Herein, we show that gene trap inactivation of Slc25a32 ( Mft ) in mice induces NTDs that are folate (5-methyltetrahydrofolate, 5-mTHF) resistant yet are preventable by formate supplementation...
April 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29665042/neural-tube-defects-in-embryonic-life-lessons-learned-from-340-early-pregnancy-failures
#8
David R Hartge, Michael Gembicki, Achim Rody, Jan Weichert
OBJECTIVES: The aim of this study was to evaluate the feasibility of sonographic assessment of the embryonic/fetal neural tube in nonviable pregnancies and to determine the defect incidence. METHODS: Prospective analysis of transvaginally acquired 3-dimensional (3D) multiplanar and 3D surface-rendered volume sets of 340 cases of missed abortion between March 2010 and September 2015 was performed. Data regarding karyotype and postmortem examination as well as demographic features and the outcomes of subsequent pregnancies were evaluated...
April 17, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29657092/the-critical-chemical-and-mechanical-regulation-of-folic-acid-on-neural-engineering
#9
Gloria B Kim, Yongjie Chen, Weibo Kang, Jinshan Guo, Russell Payne, Hui Li, Qiong Wei, Julianne Baker, Cheng Dong, Sulin Zhang, Pak Kin Wong, Elias B Rizk, Jiazhi Yan, Jian Yang
The mandate of folic acid supplementation in grained products has reduced the occurrence of neural tube defects by one third in the U.S since its introduction by the Food and Drug Administration in 1998. However, the advantages and possible mechanisms of action of using folic acid for peripheral nerve engineering and neurological diseases still remain largely elusive. Herein, folic acid is described as an inexpensive and multifunctional niche component that modulates behaviors in different cells in the nervous system...
April 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29621304/trends-in-congenital-anomalies-in-europe-from-1980-to-2012
#10
Joan K Morris, Anna L Springett, Ruth Greenlees, Maria Loane, Marie-Claude Addor, Larraitz Arriola, Ingeborg Barisic, Jorieke E H Bergman, Melinda Csaky-Szunyogh, Carlos Dias, Elizabeth S Draper, Ester Garne, Miriam Gatt, Babak Khoshnood, Kari Klungsoyr, Catherine Lynch, Robert McDonnell, Vera Nelen, Amanda J Neville, Mary O'Mahony, Anna Pierini, Annette Queisser-Luft, Hanitra Randrianaivo, Judith Rankin, Anke Rissmann, Jennifer Kurinczuk, David Tucker, Christine Verellen-Dumoulin, Diana Wellesley, Helen Dolk
BACKGROUND: Surveillance of congenital anomalies is important to identify potential teratogens. METHODS: This study analysed the prevalence of 61 congenital anomaly subgroups (excluding chromosomal) in 25 population-based EUROCAT registries (1980-2012). Live births, fetal deaths and terminations of pregnancy for fetal anomaly were analysed with multilevel random-effects Poisson regression models. RESULTS: Seventeen anomaly subgroups had statistically significant trends from 2003-2012; 12 increasing and 5 decreasing...
2018: PloS One
https://www.readbyqxmd.com/read/29617604/neural-tube-defects-and-folic-acid-food-fortification-in-europe
#11
Michael J Turner
No abstract text is available yet for this article.
May 2018: American Journal of Public Health
https://www.readbyqxmd.com/read/29587542/effects-of-maternal-folic-acid-supplementation-on-airway-remodeling-and-allergic-airway-disease-development
#12
Burcin İscan, Funda Tuzun, Berna Eroglu Filibeli, Serap Cilekar Micili, Bekir Ugur Ergur, Nuray Duman, Hasan Ozkan, Abdullah Kumral
OBJECTIVE: Maternal folic acid supplementation has been recommended prior to and during the first trimester of pregnancy to reduce the risk of infant neural tube defects. However, an uncertain relationship between folic acid supplementation during pregnancy and development of childhood asthma exists. Recent data show a methyl donor-rich diet could increase the risk of developing allergic airway disease through DNA methylation and aberrant gene transcription. This study evaluated the effect of folic acid supplementation during pregnancy on airway remodeling and allergic airway disease vulnerability in a mouse asthma model...
March 27, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29575870/how-is-the-process-of-setting-micronutrients-recommendations-reflected-in-nutrition-policies-in-poland-the-case-study-of-folate
#13
Ewa Sicińska, Marta Jeruszka-Bielak, Wojciech Roszkowski, Anna Brzozowska, Mirosław Jarosz, Monique M Raats
INTRODUCTION AND OBJECTIVE: Ensuring the adequate intake of micronutrients by populations is an important aspect of public health. This study aims to elucidate the process of setting nutrition recommendations and the development of subsequent policies associated with micronutrients in Poland by using the case study of folate. MATERIAL AND METHODS: The study was based on 13 interviews conducted between October 2010 - February 2011, and desk research comprising a review of the associated scientific literature and relevant documents, such as scientific opinions and reports of the meetings of scientific committees...
March 14, 2018: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/29558816/prenatal-primary-prevention-of-mental-illness-by-micronutrient-supplements-in-pregnancy
#14
Robert Freedman, Sharon K Hunter, M Camille Hoffman
Genes, infection, malnutrition, and other factors affecting fetal brain development are a major component of risk for a child's emotional development and later mental illnesses, including schizophrenia, bipolar disorder, and autism. Prenatal interventions to ameliorate that risk have yet to be established for clinical use. A systematic review of prenatal nutrients and childhood emotional development and later mental illness was performed. Randomized trials of folic acid, phosphatidylcholine, and omega-3 fatty acid supplements assess effects of doses beyond those adequate to remedy deficiencies to promote normal fetal development despite genetic and environmental risks...
March 21, 2018: American Journal of Psychiatry
https://www.readbyqxmd.com/read/29538416/neural-tube-defects-sex-ratio-changes-after-fortification-with-folic-acid
#15
Fernando A Poletta, Monica Rittler, Cesar Saleme, Hebe Campaña, Juan A Gili, Mariela S Pawluk, Lucas G Gimenez, Viviana R Cosentino, Eduardo E Castilla, Jorge S López-Camelo
BACKGROUND: Historically, neural tube defects (NTDs) have predominated in female infants but the reasons remain unclear. In South America, the pre- folic acid fortification (FAF) rates of NTDs were around 18/10,000 births for females and 12/10,000 births for males, with an estimated sex ratio (male/female) of 0.67. During the post- FAF period, unpublished routine reports have indicated changes in the sex ratio for these defects while some descriptive reports are controversial. To date and to our knowledge, however, no studies specifically focusing on these changes to test this hypothesis directly have been undertaken...
2018: PloS One
https://www.readbyqxmd.com/read/29532629/countries-with-an-immediate-potential-for-primary-prevention-of-spina-bifida-and-anencephaly-mandatory-fortification-of-wheat-flour-with-folic-acid
#16
Vijaya Kancherla
OBJECTIVES: Mandatory fortification of flour with folic acid has been proven to be a highly effective way to prevent spina bifida and anencephaly. Yet, over 100 countries worldwide do not implement this intervention. Our objectives were to identify countries with an immediate potential for mandatory fortification of wheat flour with folic acid and to estimate the number of preventable cases of spina bifida and anencephaly that would be averted each year through the intervention. METHODS: We examined folic acid fortification characteristics in countries as of September 2017...
March 13, 2018: Birth Defects Research
https://www.readbyqxmd.com/read/29532515/triple-surveillance-a-proposal-for-an-integrated-strategy-to-support-and-accelerate-birth-defect-prevention
#17
Lorenzo D Botto, Pierpaolo Mastroiacovo
Preventing neural tube defects (NTDs) easily qualifies as a high-value opportunity to improve childhood survival and health: the unmet need is significant (major preventable burden), the intervention is transformative (providing sufficient folic acid), and delivery strategies (e.g., fortification) are effective in low-resource countries. Yet, NTD prevention is lagging. Can public health surveillance help fix this problem? Critics contend that surveillance is largely unnecessary, that limited resources are best spent on interventions, and that surveillance is unrealistic in developing countries...
February 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29532513/historical-perspective-on-folic-acid-and-challenges-in-estimating-global-prevalence-of-neural-tube-defects
#18
REVIEW
Vijaya Kancherla, Robert E Black
Neural tube defects (NTD) are major congenital malformations affecting births worldwide. NTD are associated with life-long disability, significant medical care costs, and child mortality. Their prevalence varies worldwide. We conducted a review of published literature and surveillance systems to examine challenges in estimating an overall global prevalence estimate for NTD. Our review showed that most low- and middle-income countries do not track NTD and indicate a high prevalence of these malformations where data are available...
February 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29511242/the-pharmacokinetic-advantage-of-5-methyltetrahydrofolate-for-minimization-of-the-risk-for-birth-defects
#19
Steven W Bailey, June E Ayling
Despite efforts to increase folic acid (FA) intake, even within countries mandating FA fortification, there remain pregnant women with folate levels inadequate to minimize congenital disorders (e.g., of the neural tube, heart, and lip/palate). The pharmacokinetics of FA and [6S]-5-methyltetrahydrofolate (5-MTHF) were examined to find a reliable and minimal dose for rapidly rescuing folate status prior to critical periods of embryonic development. Serum total folate increased much more rapidly over the first four days in insufficient women given 7...
March 6, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29477222/recent-developments-in-folate-nutrition
#20
REVIEW
Nassim Naderi, James D House
The term folate (vitamin B9) refers to a group of water-soluble compounds that are nutritionally essential for the support of optimal human health and development. Folates participate in numerous one-carbon transfer reactions, including the methylation of important biomolecules (lipids, amino acids, DNA). A deficiency of folate leads to pathological outcomes including anemia and impairments in reproductive health and fetal development. Due to the linkage of impaired folate status with an increased prevalence of neural tube defects (NTDs) in babies, several jurisdictions required the fortification of the food supply with folic acid, a synthetic and stable form of folate...
2018: Advances in Food and Nutrition Research
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