Effects of Maternal Folate and Folic Acid Supplementation on DNA Methylation in the Newborn Infant
2014年9月16日 更新者:Young In Kim、Unity Health Toronto
An overwhelming body of evidence of the protective effect of folic acid supplementation on neural tube defect affected pregnancies led to mandatory folic acid fortification in Canada in 1998.
Folate is an important co-factor in the transfer of one-carbon units essential in DNA synthesis, repair, and methylation reactions, aberrations of which have been implicated in the pathogenesis of several chronic diseases including cancer.
Epigenetic reprogramming occurs in utero and has the potential to be modulated by the methyl donor supply of which folate is a contributor.
Animal studies have shown maternal folate exposure can modulate epigenetic changes in the offspring, however, there is limited evidence of this relationship in humans.
The aim of this research is to determine the effects of maternal dietary folate and supplemental folic acid intake during the periconceptional and in utero periods on global and gene-specific DNA methylation in human infants.
This is a prospective observational study involving 368 Canadian mother-child pairs recruited from St. Michael's Hospital in Toronto, Ontario.
Dietary and demographical information was collected from consenting pregnant women at study baseline (12-16 weeks gestation) and in the third trimester (34-37 weeks gestation).
Maternal blood samples were obtained at baseline and prior to delivery and a sample of umbilical cord blood was collected at parturition to measure levels of folate status.
Global and gene-specific DNA methylation in umbilical cord blood will be correlated with cord and maternal folate status.
The data will be analyzed using separate ordinary least squares (OLS) regressions.
Results from this study will contribute to a better understanding of how maternal folate and folic acid intake can modulate epigenetic modifications in the offspring and potentially have an effect on disease susceptibility later in life.
研究概览
地位
完全的
研究类型
观察性的
注册 (实际的)
368
联系人和位置
本节提供了进行研究的人员的详细联系信息,以及有关进行该研究的地点的信息。
学习地点
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Ontario
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Toronto、Ontario、加拿大、M5B 1W8
- St. Michael's Hospital
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参与标准
研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
18年 至 45年 (成人)
接受健康志愿者
是的
有资格学习的性别
女性
取样方法
非概率样本
研究人群
Pregnant women were recruited from obstetrics clinics at St Michael's Hospital, a tertiary teaching hospital affiliated with the University of Toronto.
描述
Inclusion Criteria:
- singleton pregnancy
Exclusion Criteria:
- celiac disease
- Crohn's disease
- irritable bowel disease (IBD)
- gastric bypass surgery
- use of antifolate medications
- banking umbilical cord blood
学习计划
本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。
研究是如何设计的?
设计细节
队列和干预
团体/队列 |
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孕妇
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
大体时间 |
---|---|---|
Global CpG DNA methylation in umbilical cord blood lymphocytes determined by LC/MS-MS
大体时间:Day 1
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Maternal dietary intake and supplemental use and blood levels of folate/folic acid and other one carbon nutrients in early and late pregnancy will be correlated with global CpG DNA methylation in umbilical cord blood lymphocytes
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Day 1
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
调查人员
- 首席研究员:Young-In Kim, MD、Unity Health Toronto
- 首席研究员:Deborah O'Connor, RD, PhD、The Hospital for Sick Children
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
- Plumptre L, Tammen SA, Sohn KJ, Masih SP, Visentin CE, Aufreiter S, Malysheva O, Schroder TH, Ly A, Berger H, Croxford R, Lamers Y, Caudill MA, Choi SW, O'Connor DL, Kim YI. Maternal and Cord Blood Folate Concentrations Are Inversely Associated with Fetal DNA Hydroxymethylation, but Not DNA Methylation, in a Cohort of Pregnant Canadian Women. J Nutr. 2020 Feb 1;150(2):202-211. doi: 10.1093/jn/nxz232.
- Visentin CE, Masih SP, Plumptre L, Schroder TH, Sohn KJ, Ly A, Lausman AY, Berger H, Croxford R, Lamers Y, Kim YI, O'Connor DL. Low Serum Vitamin B-12 Concentrations Are Prevalent in a Cohort of Pregnant Canadian Women. J Nutr. 2016 May;146(5):1035-42. doi: 10.3945/jn.115.226845. Epub 2016 Apr 13.
- Plumptre L, Masih SP, Ly A, Aufreiter S, Sohn KJ, Croxford R, Lausman AY, Berger H, O'Connor DL, Kim YI. High concentrations of folate and unmetabolized folic acid in a cohort of pregnant Canadian women and umbilical cord blood. Am J Clin Nutr. 2015 Oct;102(4):848-57. doi: 10.3945/ajcn.115.110783. Epub 2015 Aug 12.
- Masih SP, Plumptre L, Ly A, Berger H, Lausman AY, Croxford R, Kim YI, O'Connor DL. Pregnant Canadian Women Achieve Recommended Intakes of One-Carbon Nutrients through Prenatal Supplementation but the Supplement Composition, Including Choline, Requires Reconsideration. J Nutr. 2015 Aug;145(8):1824-34. doi: 10.3945/jn.115.211300. Epub 2015 Jun 10.
- Visentin CE, Masih S, Plumptre L, Malysheva O, Nielsen DE, Sohn KJ, Ly A, Lausman AY, Berger H, Croxford R, El-Sohemy A, Caudill MA, O'Connor DL, Kim YI. Maternal Choline Status, but Not Fetal Genotype, Influences Cord Plasma Choline Metabolite Concentrations. J Nutr. 2015 Jul;145(7):1491-7. doi: 10.3945/jn.115.211136. Epub 2015 May 13.
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2010年9月1日
初级完成 (实际的)
2013年2月1日
研究注册日期
首次提交
2014年9月2日
首先提交符合 QC 标准的
2014年9月16日
首次发布 (估计)
2014年9月19日
研究记录更新
最后更新发布 (估计)
2014年9月19日
上次提交的符合 QC 标准的更新
2014年9月16日
最后验证
2014年9月1日
更多信息
与本研究相关的术语
其他研究编号
- 10-246
此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.