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van Vliet MM, Schoenmakers S, Gribnau J, Steegers-Theunissen RP. The one-carbon metabolism as an underlying pathway for placental DNA methylation - a systematic review. Epigenetics 2024; 19:2318516. [PMID: 38484284 PMCID: PMC10950272 DOI: 10.1080/15592294.2024.2318516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/07/2024] [Indexed: 03/19/2024] Open
Abstract
Epigenetic modifications, including DNA methylation, are proposed mechanisms explaining the impact of parental exposures to foetal development and lifelong health. Micronutrients including folate, choline, and vitamin B12 provide methyl groups for the one-carbon metabolism and subsequent DNA methylation processes. Placental DNA methylation changes in response to one-carbon moieties hold potential targets to improve obstetrical care. We conducted a systematic review on the associations between one-carbon metabolism and human placental DNA methylation. We included 22 studies. Findings from clinical studies with minimal ErasmusAGE quality score 5/10 (n = 15) and in vitro studies (n = 3) are summarized for different one-carbon moieties. Next, results are discussed per study approach: (1) global DNA methylation (n = 9), (2) genome-wide analyses (n = 4), and (3) gene specific (n = 14). Generally, one-carbon moieties were not associated with global methylation, although conflicting outcomes were reported specifically for choline. Using genome-wide approaches, few differentially methylated sites associated with S-adenosylmethionine (SAM), S-adenosylhomocysteine (SAH), or dietary patterns. Most studies taking a gene-specific approach indicated site-specific relationships depending on studied moiety and genomic region, specifically in genes involved in growth and development including LEP, NR3C1, CRH, and PlGF; however, overlap between studies was low. Therefore, we recommend to further investigate the impact of an optimized one-carbon metabolism on DNA methylation and lifelong health.
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Affiliation(s)
- Marjolein M van Vliet
- Department of Obstetrics and Gynaecology, Erasmus MC, Rotterdam, the Netherlands
- Department of Developmental Biology, Erasmus MC, Rotterdam, the Netherlands
| | - Sam Schoenmakers
- Department of Obstetrics and Gynaecology, Erasmus MC, Rotterdam, the Netherlands
| | - Joost Gribnau
- Department of Developmental Biology, Erasmus MC, Rotterdam, the Netherlands
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Zundert SKV, Rossem LV, Schoenmakers S, Steegers-Theunissen RP. Lifestyle care for transformation of medical care using an early life course approach. Reprod Biomed Online 2022; 45:847-850. [DOI: 10.1016/j.rbmo.2022.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 11/27/2022]
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van Duijn L, Steegers-Theunissen RP, Baart EB, Willemsen S, Laven JS, Rousian M. The impact of culture medium used in IVF-treatment on post-implantation embryonic growth and development with emphasis on sex-specificity: The Rotterdam Periconception Cohort. Reprod Biomed Online 2022; 45:1085-1096. [DOI: 10.1016/j.rbmo.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/08/2022] [Accepted: 06/07/2022] [Indexed: 10/18/2022]
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van Zundert SK, van Rossem L, Willemsen SP, van der Meer L, Ernst-Smelt HE, Steegers-Theunissen RP. Accumulation of periconceptional maternal social, lifestyle and medical risk factors and impairment of embryonic growth: The Rotterdam Periconceptional Cohort (Predict Study). Reprod Biomed Online 2022; 44:1123-1133. [DOI: 10.1016/j.rbmo.2022.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 02/08/2022] [Accepted: 02/11/2022] [Indexed: 11/25/2022]
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Wiegel RE, Fares DA, Willemsen SP, Steegers EA, Danser AJ, Steegers-Theunissen RP. First-trimester maternal renin-angiotensin-aldosterone system activation and fetal growth and birth weight: The Rotterdam Periconceptional Cohort. Reprod Biomed Online 2022; 44:1110-1122. [DOI: 10.1016/j.rbmo.2021.12.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
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Husen SC, Kemper ND, Go AT, Willemsen SP, Rousian M, Steegers-Theunissen RP. Periconceptional maternal folate status and the impact on embryonic head and brain structures: the Rotterdam Periconceptional Cohort. Reprod Biomed Online 2021; 44:515-523. [DOI: 10.1016/j.rbmo.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 10/04/2021] [Accepted: 11/03/2021] [Indexed: 10/19/2022]
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Voortman T, Steegers-Theunissen RP, Bergen NE, Jaddoe VWV, Looman CWN, Kiefte-de Jong JC, Schalekamp-Timmermans S. Validation of a Semi-Quantitative Food-Frequency Questionnaire for Dutch Pregnant Women from the General Population Using the Method or Triads. Nutrients 2020; 12:nu12051341. [PMID: 32397149 PMCID: PMC7284899 DOI: 10.3390/nu12051341] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/01/2020] [Accepted: 05/04/2020] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE We aimed to validate a food-frequency questionnaire (FFQ) for Dutch pregnant women, against three 24 h-recalls and blood concentrations of B-vitamins and fatty acids, using the method of triads. METHODS We included 83 pregnant women from the general population of Rotterdam, the Netherlands, at a median gestational age of 15.6 weeks. Participants completed three non-consecutive 24 h-recalls, and subsequently filled out the 293-item FFQ. Participants provided blood samples from which we analyzed serum folate and vitamin B12, as well as red blood cell folate, linoleic acid, and total saturated, monounsaturated, and polyunsaturated fatty acids. RESULTS Estimated energy intake did not differ between the FFQ and 24 h-recalls. Deattenuated Pearson's correlation coefficients, between energy-adjusted nutrient intake estimates from the FFQ and the 24 h-recalls, ranged from 0.41 (fat) to 0.88 (fiber) for macronutrients, and were around 0.6 for most micronutrients, except for vitamin E (0.27). Using the triad method, we obtained validity coefficients of 0.86 (95% Confidence Interval (CI) 0.36, 1.00) for serum folate, 0.86 (95% CI 0.18, 1.00) for red blood cell folate, and 1.00 (95% CI 0.42, 1.00) for vitamin B12. Validity coefficients for serum fatty acids ranged from 0.22 to 0.67. CONCLUSION This FFQ is a reliable tool for estimating intake of energy, macronutrients, folate and vitamin B12 among women in mid-pregnancy.
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Affiliation(s)
- Trudy Voortman
- Department of Epidemiology, Erasmus MC, 3000 CA Rotterdam, The Netherlands; (T.V.); (J.C.K.-d.J.)
| | | | - Nienke E. Bergen
- Department of Obstetrics and Gynecology, 3000 CA Erasmus MC, Rotterdam, The Netherlands; (R.P.S.-T.); (N.E.B.)
- The Generation R Study Group, Erasmus MC, 3000 CA Rotterdam, The Netherlands;
| | - Vincent W. V. Jaddoe
- The Generation R Study Group, Erasmus MC, 3000 CA Rotterdam, The Netherlands;
- Department of Pediatrics, Erasmus MC, 3000 CA Rotterdam, The Netherlands
| | - Caspar W. N. Looman
- Department of Public Health, Erasmus MC, 3000 CA Rotterdam, The Netherlands;
| | - Jessica C. Kiefte-de Jong
- Department of Epidemiology, Erasmus MC, 3000 CA Rotterdam, The Netherlands; (T.V.); (J.C.K.-d.J.)
- Department of Public Health and Primary Care, LUMC Campus, 2511 VA The Hague, The Netherlands
| | - Sarah Schalekamp-Timmermans
- Department of Obstetrics and Gynecology, 3000 CA Erasmus MC, Rotterdam, The Netherlands; (R.P.S.-T.); (N.E.B.)
- The Generation R Study Group, Erasmus MC, 3000 CA Rotterdam, The Netherlands;
- Correspondence:
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van Duijn L, Rousian M, van Marion ES, Laven JS, Steegers-Theunissen RP, Baart EB. Type of culture medium is associated with preimplantation embryo development. Fertil Steril 2019. [DOI: 10.1016/j.fertnstert.2019.07.445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Parisi F, Rousian M, Koning AH, Willemsen SP, Steegers EA, Steegers-Theunissen RP. Effect of human embryonic morphological development on fetal growth parameters: the Rotterdam Periconceptional Cohort (Predict Study). Reprod Biomed Online 2019; 38:613-620. [DOI: 10.1016/j.rbmo.2018.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/11/2018] [Accepted: 12/11/2018] [Indexed: 01/06/2023]
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Herzog EM, Eggink AJ, Willemsen SP, Slieker RC, Wijnands KP, Felix JF, Chen J, Stubbs A, van der Spek PJ, van Meurs JB, Steegers-Theunissen RP. Early- and late-onset preeclampsia and the tissue-specific epigenome of the placenta and newborn. Placenta 2017; 58:122-132. [DOI: 10.1016/j.placenta.2017.08.070] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/18/2017] [Accepted: 08/28/2017] [Indexed: 01/22/2023]
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Oostingh EC, Steegers-Theunissen RP, de Vries JH, Laven JS, Koster MP. Strong adherence to a healthy dietary pattern is associated with better semen quality, especially in men with poor semen quality. Fertil Steril 2017; 107:916-923.e2. [DOI: 10.1016/j.fertnstert.2017.02.103] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/10/2017] [Accepted: 02/11/2017] [Indexed: 01/24/2023]
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Parisi F, Rousian M, Koning AH, Willemsen SP, Cetin I, Steegers EA, Steegers-Theunissen RP. Periconceptional maternal biomarkers of one-carbon metabolism and embryonic growth trajectories: the Rotterdam Periconceptional Cohort (Predict Study). Fertil Steril 2017; 107:691-698.e1. [DOI: 10.1016/j.fertnstert.2016.11.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 11/30/2016] [Accepted: 11/30/2016] [Indexed: 10/20/2022]
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Wijnands KP, Zeilmaker GA, Meijer WM, Helbing WA, Steegers-Theunissen RP. Periconceptional parental conditions and perimembranous ventricular septal defects in the offspring. ACTA ACUST UNITED AC 2014; 100:944-50. [DOI: 10.1002/bdra.23265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kim P.J. Wijnands
- Department of Obstetrics and Gynecology, Erasmus MC; University Medical Center; Rotterdam The Netherlands
| | - Gerda A. Zeilmaker
- Department of Obstetrics and Gynecology, Erasmus MC; University Medical Center; Rotterdam The Netherlands
| | - Willemijn M. Meijer
- Department of Obstetrics and Gynecology, Erasmus MC; University Medical Center; Rotterdam The Netherlands
| | - Willem A. Helbing
- Department of Pediatrics, Division of Pediatric Cardiology, Erasmus MC; University Medical Center; Rotterdam The Netherlands
| | - Régine P.M. Steegers-Theunissen
- Department of Obstetrics and Gynecology, Erasmus MC; University Medical Center; Rotterdam The Netherlands
- Department of Clinical Genetics, Erasmus MC; University Medical Center; Rotterdam The Netherlands
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Ludwig KU, Böhmer AC, Rubini M, Mossey PA, Herms S, Nowak S, Reutter H, Alblas MA, Lippke B, Barth S, Paredes-Zenteno M, Muñoz-Jimenez SG, Ortiz-Lopez R, Kreusch T, Hemprich A, Martini M, Braumann B, Jäger A, Pötzsch B, Molloy A, Peterlin B, Hoffmann P, Nöthen MM, Rojas-Martinez A, Knapp M, Steegers-Theunissen RP, Mangold E. Strong association of variants around FOXE1 and orofacial clefting. J Dent Res 2014; 93:376-81. [PMID: 24563486 DOI: 10.1177/0022034514523987] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Nonsyndromic orofacial clefting (nsOFC) is a common, complex congenital disorder. The most frequent forms are nonsyndromic cleft lip with or without cleft palate (nsCL/P) and nonsyndromic cleft palate only (nsCPO). Although they are generally considered distinct entities, a recent study has implicated a region around the FOXE1 gene in both nsCL/P and nsCPO. To investigate this hypothesis, we analyzed the 2 most strongly associated markers (rs3758249 and rs4460498) in 2 independent samples of differing ethnicities: Central European (949 nsCL/P cases, 155 nsCPO cases, 1163 controls) and Mayan Mesoamerican (156 nsCL/P cases, 10 nsCPO cases, 338 controls). While highly significant associations for both single-nucleotide polymorphisms were obtained in nsCL/P (rs4460498: p Europe = 6.50 × 10(-06), p Mayan = .0151; rs3758249: p Europe = 2.41 × 10(-05), p Mayan = .0299), no association was found in nsCPO (p > .05). Genotyping of rs4460498 in 472 independent European trios revealed significant associations for nsCL/P (p = .016) and nsCPO (p = .043). A meta-analysis of all data revealed a genomewide significant result for nsCL/P (p = 1.31 × 10(-08)), which became more significant when nsCPO cases were added (p nsOFC = 1.56 × 10(-09)). These results strongly support the FOXE1 locus as a risk factor for nsOFC. With the data of the initial study, there is now considerable evidence that this locus is the first conclusive risk factor shared between nsCL/P and nsCPO.
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Affiliation(s)
- K U Ludwig
- Institute of Human Genetics, University of Bonn, Bonn, Germany
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Huijgen NA, van de Kamp ME, Twigt JM, de Vries JH, Eilers PH, Steegers EA, Laven JS, Steegers-Theunissen RP. The Preconception Dietary Risk score; a simple tool to assess an inadequate habitual diet for clinical practice. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.clnme.2013.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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van Uitert EM, Exalto N, Burton GJ, Willemsen SP, Koning AH, Eilers PH, Laven JS, Steegers EA, Steegers-Theunissen RP. Human embryonic growth trajectories and associations with fetal growth and birthweight. Hum Reprod 2013; 28:1753-61. [DOI: 10.1093/humrep/det115] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Beurskens LW, de Jonge R, Schoonderwaldt EM, Tibboel D, Steegers-Theunissen RP. Biomarkers of the one-carbon pathway in association with congenital diaphragmatic hernia. ACTA ACUST UNITED AC 2012; 94:557-60. [DOI: 10.1002/bdra.23039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Revised: 05/01/2012] [Accepted: 05/02/2012] [Indexed: 01/27/2023]
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Timmermans S, Steegers-Theunissen RP, Vujkovic M, Bakker R, den Breeijen H, Raat H, Russcher H, Lindemans J, Hofman A, Jaddoe VW, Steegers EA. Major dietary patterns and blood pressure patterns during pregnancy: the Generation R Study. Am J Obstet Gynecol 2011; 205:337.e1-12. [PMID: 21855845 DOI: 10.1016/j.ajog.2011.05.013] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 03/07/2011] [Accepted: 05/05/2011] [Indexed: 12/11/2022]
Abstract
OBJECTIVE We sought to evaluate associations between dietary patterns and systolic blood pressure (SBP) and diastolic blood pressure during pregnancy. STUDY DESIGN This was a prospective study of 3187 pregnant women. Participants completed a food-frequency questionnaire in early pregnancy. The Mediterranean dietary pattern, comprising high intake of vegetables, vegetable oils, pasta, fish, and legumes, and the Traditional dietary pattern, comprising high intake of meat and potatoes, were identified using factor analysis. RESULTS A higher SBP was observed among mothers with high Traditional pattern adherence. Low adherence to the Mediterranean pattern was also associated with higher SBP but only in early and mid pregnancy. A higher diastolic blood pressure throughout pregnancy was observed in mothers with high adherence to the Traditional pattern and low adherence to the Mediterranean pattern. These effect estimates were most pronounced in mid pregnancy. CONCLUSION Low adherence to a Mediterranean and high adherence to a Traditional dietary pattern is associated with a higher blood pressure in pregnancy.
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Obermann-Borst SA, Isaacs A, Younes Z, van Schaik RH, van der Heiden IP, van Duyn CM, Steegers EA, Steegers-Theunissen RP. General maternal medication use, folic acid, the MDR1 C3435T polymorphism, and the risk of a child with a congenital heart defect. Am J Obstet Gynecol 2011; 204:236.e1-8. [PMID: 21183151 DOI: 10.1016/j.ajog.2010.10.911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 09/03/2010] [Accepted: 10/13/2010] [Indexed: 02/08/2023]
Abstract
OBJECTIVE We sought to investigate maternal and child functional MDR1 C3435T polymorphism, periconception medication, folic acid use, and the risk of a congenital heart defect (CHD) in the offspring. STUDY DESIGN MDR1 3435C>T genotyping was performed in 283 case triads (mother, father, child) and 308 control triads. Information on periconception medication and folic acid use was obtained through questionnaires. RESULTS Mothers with MDR1 3435CT/TT genotype and using medication showed a significant association with the risk of a child with CHD (odds ratio [OR], 2.4; 95% confidence interval [CI], 1.3-4.3) compared to mothers with MDR1 3435CC genotype not using medication. This risk increased without folic acid use (OR, 2.8; 95% CI, 1.2-6.4), and decreased in folic acid users (OR, 1.7; 95% CI, 0.8-3.7). Children carrying the MDR1 3435CT/TT genotype and periconceptionally exposed to medication without folic acid did not show significant risks. CONCLUSION Mothers carrying the MDR1 3435T allele, using medication without folic acid, are at nearly 3-fold increased risk for CHD in the offspring.
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van Driel LM, Zwolle LJ, de Vries JH, Boxmeer JC, Lindemans J, Steegers EA, Steegers-Theunissen RP. The preconception nutritional status of women undergoing fertility treatment: Use of a one-year post-delivery assessment. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.eclnm.2010.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vujkovic M, Steegers EA, van Meurs J, Yazdanpanah N, van Rooij IA, Uitterlinden AG, Steegers-Theunissen RP. The maternal homocysteine pathway is influenced by riboflavin intake and MTHFR polymorphisms without affecting the risk of orofacial clefts in the offspring. Eur J Clin Nutr 2009; 64:266-73. [PMID: 19935819 DOI: 10.1038/ejcn.2009.138] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND/OBJECTIVES Riboflavin is a cofactor for the 5,10-methylenetetrahydrofolate reductase (MTHFR) enzyme involved in the homocysteine pathway. The aim of this study was to investigate the effects of maternal riboflavin intake and two MTHFR polymorphisms (677C>T; Ala222Val and 1298A>C; Glu429Ala substitutions) on the biomarkers of the homocysteine pathway, and investigate the risk of having offspring with an orofacial cleft (OFC). SUBJECTS/METHODS In a case-control study design, dietary riboflavin intake and the MTHFR 677C>T and 1298A>C polymorphisms were evaluated in 123 OFC and 108 control mothers by using food frequency questionnaires and blood samples. Homocysteine (tHcy), folate and vitamin B12 concentrations in blood were analyzed in 70 cases and 68 controls. Linear and logistic regression analyses were applied. RESULTS At 14 months postpartum riboflavin intake and MTHFR 677C>T and 1298A>C genotypes were not significantly different between cases and controls. The 677TT genotype showed lower folate concentrations compared to C-allele carriers with a mean difference of 2.8 nmol/l in serum and 174 nmol/l in red blood cell (both P's=0.01). Every mg per day increase of dietary riboflavin intake was positively associated with increase in vitamin B12 concentration by 52.1% (P<0.01). This effect was most pronounced in MTHFR 677TT homozygotes (205.1%, P=0.03). The riboflavin-adjusted MTHFR 677TT and 1298CC genotypes showed a trend toward an increasing risk for OFC, adjusted odds ratio 1.7 (confidence interval (95% CI), 0.7-4.5) and 1.6 (95% CI, 0.7-4.2), respectively. CONCLUSIONS Maternal riboflavin intake is significantly associated with biomarkers of the homocysteine pathway, with the strongest effects in MTHFR 677TT homozygotes. The maternal risk of having OFC offspring, however, is not associated with dietary riboflavin intake.
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Affiliation(s)
- M Vujkovic
- Department of Obstetrics and Gynaecology, Erasmus University Medical Centre, Rotterdam, The Netherlands
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Vujkovic M, Steegers EA, Looman CW, Ocké MC, van der Spek PJ, Steegers-Theunissen RP. The maternal Mediterranean dietary pattern is associated with a reduced risk of spina bifida in the offspring. BJOG 2009; 116:408-15. [PMID: 19187373 DOI: 10.1111/j.1471-0528.2008.01963.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The objective of this study was to test the hypothesis whether a maternal dietary pattern is associated with the risk of spina bifida (SB) in the offspring. DESIGN Case-control study. SETTING Eight clinic sites in the Netherlands, 1999-2001. SAMPLE A total of 50 mothers of children with SB and 81 control mothers. METHODS Maternal food intakes were obtained by food frequency questionnaires at the standardised study moment of 14 months after the birth of the index child. Principal component factor analysis (PCA) and reduced rank regression (RRR) were used to identify dietary patterns. MAIN OUTCOME MEASURES Maternal biomarkers were used as response measures in the RRR analysis and composed of serum and red blood cell (RBC) folate, serum vitamin B12 and total plasma homocysteine. The strength of the use of the dietary pattern in association with SB risk was estimated by odds ratios and 95% CI with the highest quartiles of the dietary pattern as reference. RESULTS A predominantly Mediterranean dietary pattern was identified by both PCA and RRR. Those dietary patterns were highly correlated (r = 0.51, P < 0.001) and characterised by joint intakes of fruit, vegetables, vegetable oil, alcohol, fish, legumes and cereals and low intakes of potatoes and sweets. We observed a significantly increased risk of SB offspring in mothers with a weak use of the Mediterranean dietary pattern, OR 2.7 (95% CI 1.2-6.1) and OR 3.5 (95% CI 1.5-7.9). The Mediterranean dietary pattern was correlated with higher levels of serum and RBC folate, serum vitamin B12 and lower plasma homocysteine. CONCLUSION The Mediterranean dietary pattern seems to be associated with reduction in the risk of offspring being affected by SB.
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Affiliation(s)
- M Vujkovic
- Department of Obstetrics and Gynecology, Division of Obstetrics and Prenatal Medicine, University Medical Center, Rotterdam, The Netherlands
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Brouwer IA, van Dusseldorp M, West CE, Steegers-Theunissen RP. Bioavailability and bioefficacy of folate and folic acid in man. Nutr Res Rev 2009; 14:267-94. [DOI: 10.1079/nrr200126] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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van Rooij IA, Wegerif MJ, Roelofs HM, Peters WH, Kuijpers-Jagtman AM, Zielhuis GA, Merkus HM, Steegers-Theunissen RP. Smoking, genetic polymorphisms in biotransformation enzymes, and nonsyndromic oral clefting: a gene-environment interaction. Epidemiology 2001; 12:502-7. [PMID: 11505167 DOI: 10.1097/00001648-200109000-00007] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The importance of maternal smoking in the pathogenesis of oral facial clefts is not clear. Susceptibility to cigarette smoke depends on biotransformation of the toxic compounds by mother and embryo. In a population-based case-control study, we investigated the effects of maternal smoking during the first pregnancy trimester and the interaction with polymorphisms in the biotransformation enzymes cytochrome P450 1A1 (CYP1A1) and glutathione S-transferase theta 1-1 (GSTT1) on the risk of nonsyndromic oral clefting in the offspring. We recruited 113 infants with nonsyndromic oral clefts and their mothers, as well as 104 control infants and their mothers. Maternal smoking habits were collected regarding the period 3 months before through 3 months after conception. Buccal swabs were taken from mothers and infants for genetic analysis. Maternal smoking was not strongly associated with oral clefting (odds ratio = 1.1; 95% confidence interval = 0.6-2.2), nor were CYP1A1 and GSTT1 polymorphisms. Mothers who smoked and carried the GSTT1-null genotype, however, had an increased risk for having a child with oral clefting compared with nonsmokers with the wild type genotype (odds ratio = 3.2; 95% confidence interval = 0.9-11.6). The risk was almost five times greater (odds ratio = 4.9; 95% confidence interval = 0.7-36.9) in mothers and infants both having the GSTT1-null genotype compared with both having the wild genotype. There was no interaction between CYP1A1 and maternal smoking in relation to oral clefting.
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Affiliation(s)
- I A van Rooij
- Department of Epidemiology and Biostatistics, University Medical Center Nijmegen, 6500 HB Nijmegen, the Netherlands
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Brouwer IA, van Rooij IA, van Dusseldorp M, Thomas CM, Blom HJ, Hautvast JG, Eskes TK, Steegers-Theunissen RP. Homocysteine-lowering effect of 500 microg folic acid every other day versus 250 microg/day. Ann Nutr Metab 2001; 44:194-7. [PMID: 11146323 DOI: 10.1159/000046683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS Elevated plasma total homocysteine (tHcy) concentrations are a risk factor for neural tube defects and vascular diseases. Supplementation with folic acid decreases tHcy. We investigated whether supplementation with 500 microg folic acid every other day is as effective in lowering tHcy as 250 microg folic acid each day. METHODS In a 4-week intervention study, 22 healthy young women (18-40 years old) took either 500 microg folic acid every other day (500-microg/2d group) or 250 microg folic acid each day (250-microg/d group). Fasting blood was collected on days 0 and 28. RESULTS Plasma folate concentrations increased by 11.4 nmol/l (6.8-15.9) in the 250-microg/d group and by 9.1 nmol/l (95% CI 1.9-16.3) in the 500-microg/2d group. These increases were not significantly different from each other. THcy concentrations decreased by 1.52 micromol/l (95% CI -2.09 to -0.95; p < 0.001) in the 250-microg/d group and by 0.88 micromol/l (-1.53 to -0.23; p < 0.05) in the 500-microg/2d group. The difference in decrease between the 250-microg/d group and the 500-microg/2d group was 0.64 micromol/l (p = 0.11). CONCLUSION Although not conclusive, this study suggests that supplying subjects with folic acid each day decreases tHcy more effectively than a double dose every other day.
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Affiliation(s)
- I A Brouwer
- Division of Human Nutrition and Epidemiology, Wageningen University, Wageningen, The Netherlands.
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Rostami K, Steegers EA, Wong WY, Braat DD, Steegers-Theunissen RP. Coeliac disease and reproductive disorders: a neglected association. Eur J Obstet Gynecol Reprod Biol 2001; 96:146-9. [PMID: 11384797 DOI: 10.1016/s0301-2115(00)00457-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Coeliac disease is a chronic disease caused by a permanent intolerance to ingested gluten resulting in immunologically mediated inflammatory damage of the small-intestinal mucosa. The wide spectrum of clinical symptoms is partly due to the malnourished state caused by the malabsorption of macro- and micronutrients. Fertility problems, sexual dysfunction and obstetrical complications are more frequently observed in patients with coeliac disease. These reproductive disorders may be a consequence of the endocrine derangements caused by selective nutrient deficiencies. Nowadays, the early diagnosis and treatment of coeliac disease is possible and not very costly. Therefore, coeliac disease must be seriously considered in the preconceptional screening and treatment of patients with reproductive disorders.
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Affiliation(s)
- K Rostami
- Department of Internal Medicine, TwenteBorg Hospital, Almelo, The Netherlands
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Menkveld R, Wong WY, Lombard CJ, Wetzels AM, Thomas CM, Merkus HM, Steegers-Theunissen RP. Semen parameters, including WHO and strict criteria morphology, in a fertile and subfertile population: an effort towards standardization of in-vivo thresholds. Hum Reprod 2001; 16:1165-71. [PMID: 11387287 DOI: 10.1093/humrep/16.6.1165] [Citation(s) in RCA: 140] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this study, the semen analysis results of a fertile population were compared with those from a subfertile population, in order to establish normal cut-off values for the standard semen parameters with the aid of receiver operating characteristic (ROC) curve analysis. The fertile group comprised healthy males (n = 107) without any history of fertility problems, the partners of whom had had a spontaneous pregnancy within one year of unprotected intercourse and were pregnant at the time of the male's inclusion into the study. A total of 103 males from couples attending the infertility clinic, and with an initial sperm count of <20x10(6)/ml were recruited to form the subfertile population. The best discriminating parameter between the two populations was sperm morphology evaluated according to WHO criteria at a cut-off point of 31% normal spermatozoa. The other cut-off values were at 8% for the acrosome index, 45% for motility, and 4% normal spermatozoa for strict criteria. Recalculating the ROC curve cut-off values based on an assumed 50% prevalence of subfertility in an assisted reproductive setting, the cut-off points were reduced to 21% and 3% normal spermatozoa for WHO and strict criteria respectively. For motility, the new cut-off value was at 20% motile spermatozoa, for motility quality at 3.5 (on a scale of 1-6), the acrosome index at 3% normal acrosomes, and the teratozoospermia index at 2.09.
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Affiliation(s)
- R Menkveld
- Reproductive Biology Unit, Department of Obstetrics and Gynaecology, Tygerberg Hospital and University of Stellenbosch, Tygerberg, 7505 South Africa
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Wong WY, Flik G, Groenen PM, Swinkels DW, Thomas CM, Copius-Peereboom JH, Merkus HM, Steegers-Theunissen RP. The impact of calcium, magnesium, zinc, and copper in blood and seminal plasma on semen parameters in men. Reprod Toxicol 2001; 15:131-6. [PMID: 11297872 DOI: 10.1016/s0890-6238(01)00113-7] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
To investigate the impact of calcium, magnesium, zinc, and copper in blood and seminal plasma on semen parameters, 107 fertile and 103 subfertile males provided a standardized blood and semen specimen. Total calcium and magnesium concentrations were determined with colorimetric end point assay procedures. Zinc and copper were determined by flame atomic absorption spectrophotometer (AAS). Semen analysis was performed according to World Health Organization guidelines (1992). The concentrations of calcium, magnesium, zinc, and copper in blood and seminal plasma were not different between the subfertile and fertile group. Weak correlations were demonstrated between blood plasma zinc concentrations and sperm count (rs = 0.18), sperm motility (rs = 0.15), and abnormal sperm morphology (rs = 0.13). Zinc and magnesium concentrations in seminal plasma correlated weakly with sperm count (rs = 0.17 and rs = 0.16, respectively), and copper concentrations in blood plasma with motility (rs = 0.25). Strong correlations were found between calcium, magnesium, and zinc in seminal plasma. Although calcium, magnesium, zinc, and copper play an essential role in spermatogenesis and fertility, the determination of these elements in blood and seminal plasma does not discriminate on the basis of fertility in this group of men.
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Affiliation(s)
- W Y Wong
- Department of Obstetrics and Gynecology, University Medical Centre Nijmegen, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
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Abstract
Evidence of the impact of maternal nutritional status on pregnancy outcome is increasing. However, reference values for vitamin and homocysteine concentrations in maternal blood during normal pregnancy are scarce, and are lacking for the preconceptional period and early pregnancy. Thus, in a longitudinal study we evaluated vitamin and homocysteine concentrations in 102 nulliparous women with an uneventful singleton pregnancy and normal outcome not using supplements. The physiological changes in vitamin and homocysteine concentrations in blood were determined from the preconceptional period throughout pregnancy until 6 weeks post-partum. The vitamins evaluated comprised retinol, thiamin, riboflavin, pyridoxal 5'-phosphate, folate in serum and erythrocytes, vitamin B12 and alpha-tocopherol. The plasma homocysteine concentration was also measured, considering the essential roles of folate, vitamin B6 and vitamin B12 in homocysteine metabolism. The concentrations of retinol, thiamin, pyridoxal 5'-phosphate serum folate and vitamin B12 decreased during pregnancy. In contrast, the concentrations of riboflavin, alpha-tocopherol, and folate in erythrocytes increased or showed only minor changes. Homocysteine concentrations also remained approximately constant during pregnancy. These observations emphasize the importance of preconceptional and post-partum concentrations of vitamins in the evaluation of pregnancy-induced changes. These data have provided valuable reference values for vitamins and homocysteine before, during and after pregnancy in order to contribute to better diagnosis of maternal deficiencies and to study further the relationship between maternal vitamin status and adverse course and outcome of pregnancy.
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Affiliation(s)
- R J Cikot
- Department of Obstetrics and Gynaecology, University Medical Centre St Radboud, 6500 HB Nijmegen, The Netherlands
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Abstract
Effects of folate deficiency on the rate of apoptosis in human cytotrophoblastic cells has been investigated. Apoptosis was determined in cytotrophoblastic cells after culture in 1. control medium, 2. folate-free medium and 3. folate-free medium plus 10% fetal calf serum. Apoptosis rates in cells cultured in mediums 2 and 3 were significantly higher than those cultured in the control medium (P<0.02 and P<0.03, respectively). In conclusion, human cytotrophoblastic cells show a significantly increased rate of apoptosis in vitro after culture in a folate-free medium. Possible explanations for the association between folate deficiency and pregnancy complications are suggested.
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Affiliation(s)
- R P Steegers-Theunissen
- Department of Obstetrics and Gynaecology, University Hospital Nijmegen St Radboud, The Netherlands
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Brouwer IA, van Dusseldorp M, Thomas CM, van der Put NM, Gaytant MA, Eskes TK, Hautvast JG, Steegers-Theunissen RP. Homocysteine metabolism and effects of folic acid supplementation in patients affected with spina bifida. Neuropediatrics 2000; 31:298-302. [PMID: 11508548 DOI: 10.1055/s-2000-12953] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Folic acid supplementation around conception decreases the risk of having offspring with a neural tube defect. However, the aetiology is often still unknown. This study investigated whether spina bifida patients have lower blood folate and higher fasting and post-methionine-load plasma total homocysteine (tHcy) concentrations than control patients. Moreover, the effects of supplementation with 500 microg folic acid/d on folate and tHcy concentrations were determined. Spina bifida patients (n = 12) and disabled control patients (n = 15) received 4 weeks of placebo treatment followed by 4 weeks of intervention with 500 microg folic acid/d. Blood was collected at the start and after 4 and 8 weeks. A methionine-loading test was performed at the start and the end of the study. At baseline, no significant differences occurred between spina bifida and control patients. Folic acid supplementation significantly increased plasma and red blood cell folate concentrations in both groups. Folic acid decreased fasting tHcy concentrations in control patients by 1.6+/-0.5 micromol/l (p<0.01) and in spina bifida patients by 2.2 +/- 1.3 micromol/l (p = 0.10). This study does not show a derangement in homocysteine metabolism in spina bifida compared to control patients. Moreover, folic acid supplementation seems at least as effective in spina bifida patients as in controls.
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Affiliation(s)
- I A Brouwer
- Department of Obstetrics and Gynaecology, University Hospital St. Radboud, Nijmegen, The Netherlands
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Wong WY, Thomas CM, Merkus HM, Zielhuis GA, Doesburg WH, Steegers-Theunissen RP. Cigarette smoking and the risk of male factor subfertility: minor association between cotinine in seminal plasma and semen morphology. Fertil Steril 2000; 74:930-5. [PMID: 11056235 DOI: 10.1016/s0015-0282(00)01567-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To evaluate the impact of cigarette smoking on male factor subfertility and the semen parameters of sperm count, motility, and morphology by questionnaire and determination of the cotinine concentrations in blood and seminal plasma of fertile and subfertile males. DESIGN Case-control study of 107 fertile and 103 subfertile males who provided a standardized blood and semen specimen and completed a self-administered questionnaire about their smoking habits. SETTING Outpatient fertility clinic of the University Medical Centre St. Radboud, Nijmegen, The Netherlands. PATIENT(S) One hundred seven fertile and 103 subfertile males. INTERVENTION(S) Vena puncture and semen collection. MAIN OUTCOME MEASURE(S) Blood and seminal plasma cotinine levels in relation to semen parameters. RESULT(S) A higher frequency of cigarette smoking was observed in subfertile males than in fertile males, with an odds ratio of 1.7 (95% confidence interval, 0.9-3.2). The self-reported number of cigarettes smoked per day correlated with the cotinine concentrations in blood and seminal plasma for both groups. A small but statistically significant correlation was found between cotinine concentrations in seminal plasma and the percentage of abnormal sperm morphology, but not for other semen parameters (r(s) = 0.19). CONCLUSION(S) Although the mechanism of the toxicity of cotinine on sperm morphology is not clear, this study indicates only a minor effect of cigarette smoking on male factor subfertility, which is probably due to compounds in cigarette smoke other than nicotine (cotinine).
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Affiliation(s)
- W Y Wong
- Department of Obstetrics/Gynaecology, University Medical Centre St. Radboud, Nijmegen, The Netherlands
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Brouwer IA, van Dusseldorp M, Duran M, Steegers-Theunissen RP. Low-Dose folic acid supplementation decreases plasma homocysteine concentrations: a randomised trial. Indian Heart J 2000; 52:S53-58. [PMID: 11339442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
An elevated plasma total homocysteine concentration is a risk factor for cardiovascular disease and neural tube defects. A high daily intake of supplemental folic acid is known to decrease total homocysteine concentrations. We studied the effect of low-dose folic acid administration (250 or 500 microg/day for 4 weeks on plasma total homocysteine concentrations and folate status. We also investigated whether total homocysteine concentrations and blood folate concentrations returned to baseline after an 8-week washout period. In this placebo-controlled study, 144 healthy women aged 18-40 years received 500 microg folic acid per day, 500 microg folic acid every second day (250 microg/day), or a placebo tablet with their habitual diet (mean dietary folate intake 280 microg/day). Administration of 250 and 500 microg folic acid per day for four weeks significantly increased folate concentrations in plasma (p<0.001) and red blood cells (p<0.01). Total homocysteine concentrations decreased significantly (p<0.001) in women (n=50) who took 250 microg folic acid daily [mean (+/- SEM) deviation from baseline -11.4 +/-1.98%] and in women (n=45) who took 500 microg folic acid daily (-21.8 +/- 1.49%). Eight weeks after the end of the intervention period (week 12), plasma total homocysteine concentrations in the folic acid-supplemented groups had not returned to baseline (week 0). In conclusion, doses of folic acid as low as 250 microg daily, on an average, in addition to usual dietary intakes of folate, significantly decreased plasma total homocysteine concentrations in healthy, young women. An 8-week washout period was not sufficient for blood folate and plasma total homocysteine concentrations to return to baseline concentration
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Affiliation(s)
- I A Brouwer
- Division of Human Nutrition and Epidemiology, Wageningen Agricultural University, Netherlands
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Abstract
BACKGROUND During the last decade important innovations in the topical treatment of psoriasis have been accomplished, and important investments in new drug development for psoriasis are planned. METHODS A survey was conducted among psoriatic patients in order to quantify the present mode of use of topical drugs by the patients, the mode of prescription by their doctors and the compatibility of actual use and instructions to the patients. RESULTS Major observations are: The distribution of lesions, in particular on the scalp and soles, justifies major investments in the development of a treatment at these locations. calcipotriol and topical corticosteroids (classes III and IV) are by far the most frequently prescribed topical drugs. Although at the time of investigation, Calcipotriol was only available as ointment in the Netherlands, it is prescribed twice as often as clobetasol which is both available as an ointment and cream. Dermatologists are responsible for approximately 2/3 and general practitioners for 1/3 of the prescriptions. The prescription by general practitioners also comprises the continuation of prescriptions by the dermatologist. The duration of topical treatment is unrestricted in the majority of patients. However, use of up to 8 weeks is only seldom practised. Therefore, long-term safety and efficacy data of these drugs are mandatory for any topical treatment. Although twice daily treatment was advised in 50% of all patients, this treatment frequency was followed in only 33% of them. Greasiness accounted for non-compliance in 11% of the patients. Less frequent applications were desired by 38% of the patients, including patients on a once-a-day regimen. Most patients preferred the cream formulation. However, the variability of the expression of psoriasis (dry cracked exudative or superficially scaling lesions) required the availability of both cream and ointment formulations. CONCLUSION An optimal treatment of psoriasis requires a spectrum of topical drugs and their formulations in different vehicles.
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Affiliation(s)
- P C van de Kerkhof
- Department of Dermatology, University Hospital Nijmegen, The Netherlands
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Abstract
OBJECTIVE To review possible causes for male factor subfertility with emphasis on nutritional factors such as zinc and folate. DESIGN A literature search was performed on MEDLINE and via bibliographies of published works. RESULT(S) Many causes for male factor subfertility are described in the literature. Both environmental and genetic factors could play a role. However, the pathogenesis of male factor infertility is poorly understood, including the role of specific micronutrients such as zinc and folate. Both zinc and folate are involved in the synthesis of DNA and RNA. Despite the fact that zinc deficiency leads to several clinical symptoms such as decreased spermatogenesis and impaired male fertility, the exact pathophysiology has not been clarified. CONCLUSION(S) Because most causes of male factor subfertility are unknown, more research is needed. Because male factor subfertility due to nutritional deficiencies is in principle amenable to curative and/or preventive action by supplementation, emphasis should be put on studies on the effect of specific nutrients on male fertility.
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Affiliation(s)
- W Y Wong
- University Hospital Nijmegen, St. Radboud, Nijmegen, The Netherlands
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Wong WY, Eskes TK, Kuijpers-Jagtman AM, Spauwen PH, Steegers EA, Thomas CM, Hamel BC, Blom HJ, Steegers-Theunissen RP. Nonsyndromic orofacial clefts: association with maternal hyperhomocysteinemia. Teratology 1999; 60:253-7. [PMID: 10525201 DOI: 10.1002/(sici)1096-9926(199911)60:5<253::aid-tera4>3.0.co;2-v] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Maternal folic acid supplementation has been suggested to play a role in the prevention of nonsyndromic orofacial clefts, i.e., cleft lip +/- cleft palate. Using a case-control design, we investigated vitamin-dependent homocysteine metabolism in 35 mothers with nonsyndromic orofacial cleft offspring and 56 control mothers with nonmalformed offspring. A standardized oral methionine loading test was performed, in which fasting and afterload plasma total homocysteine, serum and red-cell folate, serum vitamin B12, and whole-blood vitamin B6 levels were determined. We found that both fasting (P < 0.01) as well as afterload (P < 0.05) homocysteine concentrations were significantly higher in cases compared to controls. Hyperhomocysteinemia, defined by a fasting and/or afterload homocysteine concentration above the 97.5th percentile, was present in 15.6% of the cases and in 3.6% of controls (odds ratio, 5.3 (1.1-24.2)). The median concentrations of serum (P < 0. 01) and red-cell (P < 0.05) folate were significantly higher, and vitamin B6 concentrations appeared to be significantly lower (P < 0. 05), in cases compared with controls. No significant difference was observed between groups for vitamin B12. These preliminary data offer evidence that maternal hyperhomocysteinemia may be a risk factor for having nonsyndromic orofacial cleft offspring.
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Affiliation(s)
- W Y Wong
- Department of Obstetrics and Gynecology, University Hospital Nijmegen St. Radboud, 6500 HB Nijmegen, The Netherlands
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Zusterzeel PL, Knapen MF, Roes EM, Steegers-Theunissen RP, Peters WH, Merkus HM, Steegers EA. Glutathione S-transferase alpha levels in epileptic and healthy women preconceptionally and throughout pregnancy. Gynecol Obstet Invest 1999; 48:89-92. [PMID: 10460997 DOI: 10.1159/000010146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We studied plasma GSTA1-1 concentrations in preconceptionally recruited epileptic women who received antiepileptic drugs (n = 99) and a control group of healthy women (n = 106). Mean plasma GSTA1-1 concentrations in the control group did not show significant changes preconceptionally and throughout pregnancy. Six weeks postpartum, however, a significant increase in the mean plasma GSTA1-1 concentration (p < 0.001) was found as compared to preconceptional levels and levels during pregnancy. The mean plasma GSTA1-1 concentration in epileptic women was significantly higher in the 4th gestational week compared to those determined in healthy pregnant women (1.68 versus 1.08 microg/l, p < 0.001). Values between the groups in the second and third trimester and postpartum period showed no significant differences.
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Affiliation(s)
- P L Zusterzeel
- Department of Obstetrics and Gynaecology, University Hospital Nijmegen, The Netherlands
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van het Hof KH, Brouwer IA, West CE, Haddeman E, Steegers-Theunissen RP, van Dusseldorp M, Weststrate JA, Eskes TK, Hautvast JG. Bioavailability of lutein from vegetables is 5 times higher than that of beta-carotene. Am J Clin Nutr 1999; 70:261-8. [PMID: 10426704 DOI: 10.1093/ajcn.70.2.261] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND To gain more insight into the relation between vegetable consumption and the risk of chronic diseases, it is important to determine the bioavailability of carotenoids from vegetables and the effect of vegetable consumption on selected biomarkers of chronic diseases. OBJECTIVE To assess the bioavailability of beta-carotene and lutein from vegetables and the effect of increased vegetable consumption on the ex vivo oxidizability of LDL. DESIGN Over 4 wk, 22 healthy adult subjects consumed a high-vegetable diet (490 g/d), 22 consumed a low-vegetable diet (130 g/d), and 10 consumed a low-vegetable diet supplemented with pure beta-carotene (6 mg/d) and lutein (9 mg/d). RESULTS Plasma concentrations of vitamin C and carotenoids (ie, alpha-carotene, beta-carotene, lutein, zeaxanthin, and beta-cryptoxanthin) were significantly higher after the high-vegetable diet than after the low-vegetable diet. In addition to an increase in plasma beta-carotene and lutein, the pure carotenoid-supplemented diet induced a significant decrease in plasma lycopene concentration of -0.11 micromol/L (95% CI: -0.21, -0.0061). The responses of plasma beta-carotene and lutein to the high-vegetable diet were 14% and 67%, respectively, of those to the pure carotenoid- supplemented diet. Conversion of beta-carotene to retinol may have attenuated its plasma response compared with that of lutein. There was no significant effect on the resistance of LDL to oxidation ex vivo. CONCLUSIONS Increased vegetable consumption enhances plasma vitamin C and carotenoid concentrations, but not resistance of LDL to oxidation. The relative bioavailability of lutein from vegetables is higher than that of beta-carotene.
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Brouwer IA, van Dusseldorp M, Duran M, Thomas CM, Hautvast JG, Eskes TK, Steegers-Theunissen RP. Low-dose folic acid supplementation does not influence plasma methionine concentrations in young non-pregnant women. Br J Nutr 1999; 82:85-9. [PMID: 10743479 DOI: 10.1017/s0007114599001221] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
An elevated plasma total homocysteine (tHcy) concentration is a risk factor for cardiovascular disease and for having offspring with a neural-tube defect. Folate is a methyl donor in the remethylation of homocysteine into methionine. Although folic acid supplementation decreases tHcy concentrations, effects of folic acid supplementation on plasma methionine concentrations are unclear. There is also concern that folic acid supplementation negatively affects vitamin B12 status. We studied effects of low-dose folic acid supplementation on methionine and vitamin B12 concentrations in plasma. We also investigated whether baseline plasma methionine and tHcy concentrations correlated with the baseline folate and vitamin B12 status. For a period of 4 weeks, 144 young women received either 500 micrograms folic acid each day, or 500 micrograms folic acid and placebo tablets on alternate days, or a placebo tablet each day. Plasma methionine, tHcy and plasma vitamin B12 concentrations were measured at start and end of the intervention period. Folic acid supplementation had no effect on plasma methionine or plasma vitamin B12 concentrations although it significantly decreased tHcy concentrations. Plasma methionine concentrations showed no correlation with either tHcy concentrations (Spearman rs-0.01, P = 0.89), or any of the blood vitamin variables at baseline. Baseline tHcy concentrations showed a slight inverse correlation with baseline concentrations of plasma vitamin B12 (rs-0.25, P < 0.001), plasma folate (rs-0.24, P < 0.01) and erythrocyte folate (rs-0.19, P < 0.05). In conclusion, low-dose folic acid supplementation did not influence plasma methionine or plasma vitamin B12 concentrations. Furthermore, no correlation between plasma methionine concentrations and the blood folate and vitamin B12 status was shown.
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Affiliation(s)
- I A Brouwer
- Division of Human Nutrition and Epidemiology, Wageningen Agricultural University, The Netherlands.
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Brouwer IA, van Dusseldorp M, West CE, Meyboom S, Thomas CM, Duran M, van het Hof KH, Eskes TK, Hautvast JG, Steegers-Theunissen RP. Dietary folate from vegetables and citrus fruit decreases plasma homocysteine concentrations in humans in a dietary controlled trial. J Nutr 1999; 129:1135-9. [PMID: 10356077 DOI: 10.1093/jn/129.6.1135] [Citation(s) in RCA: 152] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Elevated total plasma homocysteine (tHcy) concentrations are considered a risk factor for neural tube defects (NTD) and cardiovascular disease. Supplementation with folic acid decreases the risk of women having children with NTD. In both sexes, it decreases tHcy levels. We investigated the efficacy of natural dietary folate in improving folate and homocysteine status. We performed a 4-wk dietary controlled, parallel design intervention trial with 66 healthy subjects (18-45 y) divided into 3 treatment groups: the dietary folate group, the folic acid group and the placebo group. Each day each group was fed a different diet. The dietary folate group received a diet high in vegetables and citrus fruit (total folate content approximately 560 microgram) plus a placebo tablet. The folic acid group received a diet naturally low in folate (approximately 210 microgram) plus 500 microgram folic acid and placebo tablet on alternate days, i.e., 250 microgram folic acid/d. And the placebo group received the same low-folate diet as the folic acid group plus a placebo tablet. After 4 wk of intervention, folate status improved, and tHcy concentrations decreased in both the dietary folate and the folic acid groups. From the amount of additional folate (350 microgram/d) and folic acid (250 microgram/d) consumed, the relative bioavailability of dietary folate compared to folic acid was calculated to be 60-98%, depending on the endpoint used. In conclusion, increasing the consumption of vegetables and citrus fruit, both good sources of folate, will improve folate status and decrease tHcy concentrations. This may contribute to the prevention of cardiovascular disease and NTD in the general population
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Affiliation(s)
- I A Brouwer
- Division of Human Nutrition, Wageningen Agricultural University, 6700 EV Wageningen, The Netherlands
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Brouwer IA, van Dusseldorp M, Thomas CM, Duran M, Hautvast JG, Eskes TK, Steegers-Theunissen RP. Low-dose folic acid supplementation decreases plasma homocysteine concentrations: a randomized trial. Am J Clin Nutr 1999; 69:99-104. [PMID: 9925130 DOI: 10.1093/ajcn/69.1.99] [Citation(s) in RCA: 164] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND An elevated plasma total homocysteine concentration is a risk factor for cardiovascular disease and neural tube defects. A high daily intake of supplemental folic acid is known to decrease total homocysteine concentrations. OBJECTIVE We studied the effect of low-dose folic acid administration (250 or 500 (microgram/d) for 4 wk on plasma total homocysteine concentrations and folate status. We also investigated whether total homocysteine concentrations and blood folate concentrations returned to baseline after an 8-wk washout period. DESIGN In this placebo-controlled study, 144 healthy women aged 18-40 y received 500 microgram folic acid/d, 500 microgram folic acid every second day (250 microgram/d), or a placebo tablet with their habitual diet (mean dietary folate intake: 280 microgram/d). RESULTS Administration of 250 and 500 microgram folic acid/d for 4 wk significantly increased folate concentrations in plasma (P < 0.001) and red blood cells (P < 0.01). Total homocysteine concentrations decreased significantly (P < 0.001) in women (n = 50) who took 250 microgram folic acid/d [mean (+/-SEM) deviation from baseline: - 11.4 +/- 198%] and in women (n = 45) who took 500 microgram folic acid/d (-21.8 + 1.49%). Eight weeks after the end of the intervention period (week 12), plasma total homocysteine concentrations in the folic acid-supplemented groups had not returned to baseline (week 0). CONCLUSIONS Doses of folic acid as low as 250 microgram/d, on average, in addition to usual dietary intakes of folate significantly decreased plasma total homocysteine concentrations in healthy, young women. An 8-wk washout period was not sufficient for blood folate and plasma total homocysteine concentrations to return to baseline concentrations.
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Affiliation(s)
- I A Brouwer
- Division of Human Nutrition and Epidemiology, Wageningen Agricultural University, Netherlands.
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Huisjes AJ, Bruinse HW, Steegers-Theunissen RP, Merkus JM, Visser GH. [Multiples births: a continuing problem with assisted reproductive techniques]. Ned Tijdschr Geneeskd 1998; 142:2290-3. [PMID: 9864522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Assisted reproductive techniques (ART) such as in vitro fertilisation (IVF), ovulation induction and superovulation followed by insemination have caused a sharp increase in multiple birth prevalence rates. The perinatal morbidity of multiple birth infants is high because of the high incidence of premature birth. The social and psychological problems of multiple birth families are also considerable. In 1990 high-order multiple births were mainly the result of IVF. Although the number of IVF treatments has increased more than the number of other ART treatments, nowadays high-order multiple births are predominantly caused by superovulation. Since 1990 the number of high-order multiple births has stabilised, but the recent sharp increase in ART twins results in a further rise in births of severely preterm ART infants. More restraint should be practised in superovulation treatments to bring down the number of (high-order) multiple births.
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Affiliation(s)
- A J Huisjes
- Academisch Ziekenhuis, afd. Verloskunde en Gynaecologie, Utrecht
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43
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Brouwer IA, Van Dusseldorp M, De Vries JH, Steegers-Theunissen RP. [The recommended daily amount of folic acid is insufficient for optimum homocysteine levels]. Ned Tijdschr Geneeskd 1998; 142:1473. [PMID: 9752062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Steegers-Theunissen RP, Zwertbroek WM, Huisjes AJ, Kanhai HH, Bruinse HW, Merkus HM. Multiple birth prevalence in The Netherlands. Impact of maternal age and assisted reproductive techniques. J Reprod Med 1998; 43:173-9. [PMID: 9564640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To evaluate the impact of maternal age and use of fertility drugs on multiple birth prevalence from 1970 to 1995 in the Netherlands. STUDY DESIGN A population-based survey was carried out in which data were collected from the Centraal Bureau voor Statistiek, the Institute of Medical Statistics and from all clinics for in vitro fertilization. RESULTS In the last two decades, the prevalence of multiple births, especially of twin and triplet births, has increased significantly. Three possible explanations for this phenomenon are: (1) introduction of assisted reproductive techniques in combination with fertility drugs; (2) increasing maternal age; and (3) decreasing fecundity with increasing maternal age, resulting in more fertility treatments. A surplus of 1,366 twins was born in 1995 as compared to 1975. The expected excess of twins was 1,368, of which 104 (7.6%) were a result of the increase in total births in 1995, 583 (42.6%) were due to maternal age > 29 years, and, respectively, 330 (24.1%) and 351 (25.7%) twins were due to in vitro fertilization treatment and intrauterine insemination. CONCLUSION The delay in achieving pregnancy and the use of fertility-promoting therapies profoundly affect the prevalence of multiple pregnancies in a given country. The general population should be informed of this risk.
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de Bree A, van Dusseldorp M, Brouwer IA, van het Hof KH, Steegers-Theunissen RP. Folate intake in Europe: recommended, actual and desired intake. Eur J Clin Nutr 1997; 51:643-60. [PMID: 9347284 DOI: 10.1038/sj.ejcn.1600467] [Citation(s) in RCA: 127] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To evaluate possible inconsistencies between recommended, actual and desired folate intake in European adult populations. DESIGN Review of dietary recommendations, of food consumption surveys, and of intervention and observational studies relating folate intake to the risk of neural tube defects and plasma homocysteine levels. RESULTS In Europe, mean dietary folate intake in adults is 291 micrograms/d (range 197-326) for men and 247 micrograms/d (range 168-320) for women. The recommended intakes vary between 200-300 micrograms/d (men) and 170-300 micrograms/d (women). However, women with a previous pregnancy affected by a neural tube defect (NTD), are recommended to take 4000 micrograms/d of supplemental folic acid when planning a subsequent pregnancy. For those without a history of NTD, the use of 400 micrograms/d of supplemental folic acid is the best option to prevent the occurrence of NTDs. A daily dose of 650 micrograms supplemental folic acid normalises elevated plasma homocysteine levels, which is a risk factor for cardiovascular diseases. A dietary folate intake of at least 350 micrograms/d is desired to prevent an increase in plasma homocysteine levels of the adult population in general. CONCLUSIONS Mean dietary folate intake in Europe is in line with recommendations, but the desired dietary intake of > 350 micrograms/d is only reached by a small part of studied European populations. It is considered unethical to investigate whether supplements with a dose lower than 400 micrograms/d of folic acid are also protective against NTDs. However, research to establish the lowest effective dose of dietary folate/supplemental folic acid to optimise homocysteine levels and research on the bioavailability of folate is required. This will enable the choice of a strategy to achieve desired folate intakes in the general population. In the meantime, consumption of plant foods like vegetables, fruits, and cereals should be stimulated to reach the desired level of 350 micrograms of dietary folate per day.
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Affiliation(s)
- A de Bree
- Department of Human Nutrition, Wageningen Agricultural University, The Netherlands
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van der Put NM, Thomas CM, Eskes TK, Trijbels FJ, Steegers-Theunissen RP, Mariman EC, De Graaf-Hess A, Smeitink JA, Blom HJ. Altered folate and vitamin B12 metabolism in families with spina bifida offspring. QJM 1997; 90:505-10. [PMID: 9327028 DOI: 10.1093/qjmed/90.8.505] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Folic acid intake reduces the risk of neural tube defects (NTDs). Although the 677C-->T mutation in the 5,10-methylenetetrahydrofolate reductase (MTHFR) gene is a risk factor for NTDs, it only partly explains the elevated homocysteine levels in mothers of children with NTDs. We measured vitamin B12, folate and homocysteine in patients with spina bifida (SB), their parents, and in controls, to investigate which other enzymes of homocysteine metabolism might be defective. Because homozygosity for the 677C-->T mutation causes decreased plasma folate and increased red-cell folate (RCF) and plasma homocysteine levels, we excluded individuals homozygous for that mutation. The remaining SB patients and their parents still had lowered plasma folate and elevated total homocysteine levels, and a small subset had decreased vitamin B12 levels. Red-cell folate was the same in all groups, suggesting that dietary folate intake and its uptake was normal. Risk of SB was increased at the 25th percentile of plasma folate and at the 75th percentile of homocysteine values in SB patients and their parents, and at the 5th and 25th percentiles of vitamin B12 in mothers with SB-affected offspring. This underlines the functional importance of homocysteine remethylation to methionine. There was no correlation between vitamin B12 and homocysteine or RCF. In combination with the lowered plasma folate (80-90% 5-methyltetrahydrofolate), our data do not support a major involvement of methionine synthase in the aetiology of SB. Our data rather favour the involvement of genetic variation at loci coding for the formation of 5-methyltetrahydrofolate, such as MTHFR, methylenetetrahydrofolate dehydrogenase or serine hydroxymethyltransferase.
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Affiliation(s)
- N M van der Put
- Department of Pediatrics, University Hospital Nijmegen, The Netherlands
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Steegers-Theunissen RP, Wathen NC, Eskes TK, van Raaij-Selten B, Chard T. Maternal and fetal levels of methionine and homocysteine in early human pregnancy. Br J Obstet Gynaecol 1997; 104:20-4. [PMID: 8988690 DOI: 10.1111/j.1471-0528.1997.tb10642.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To investigate methionine metabolism during normal human embryonic development by measuring levels of methionine and total homocysteine in samples of maternal serum, extra-embryonic coelomic fluid, and amniotic fluid. DESIGN Cross-sectional observational study. SETTING Collaboration between St Bartholomew's Hospital, London, and the University Hospital of Nijmegen in The Netherlands. PARTICIPANTS Twenty-three women with uncomplicated pregnancies between 8 and 12 weeks of gestation before surgical termination of an ultrasonographically normal fetus. METHODS Maternal serum samples were collected prior to surgery. Samples of extra-embryonic fluid and amniotic fluids were obtained by transvaginal ultrasound-guided coelocentesis and amniocentesis. Methionine was measured using an amino acid analyser and total homocysteine by high performance liquid chromatography. RESULTS Levels of methionine were four times higher in extra-embryonic coelomic fluid and twice as high in amniotic fluid compared with maternal serum. In contrast, the total homocysteine concentrations were much lower in both extra-embryonic coelomic fluid and amniotic fluid than in maternal serum. All differences were significant (P < or = 0.01). CONCLUSIONS The comparatively high concentrations of methionine in extra-embryonic coelomic fluid and amniotic fluid, and the concomitant low levels of total homocysteine in these fluids, suggest a role for methionine metabolism during early human pregnancy.
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van der Put NM, van den Heuvel LP, Steegers-Theunissen RP, Trijbels FJ, Eskes TK, Mariman EC, den Heyer M, Blom HJ. Decreased methylene tetrahydrofolate reductase activity due to the 677C-->T mutation in families with spina bifida offspring. J Mol Med (Berl) 1996; 74:691-4. [PMID: 8956155 DOI: 10.1007/s001090050073] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Periconceptional folate intake reduces both the occurrence and recurrence risk of neural tube defects. Plasma homocysteine levels can be elevated in mothers of a child with a neural tube defect, suggesting a dysfunctional folate metabolism. Very recently we showed that a common 677C-->T mutation in the 5,10-methylene tetrahydrofolate reductase gene, causing thermolability of the enzyme, is a risk factor for spina bifida offspring. Restriction enzyme analysis of the genomic 5,10-methylene tetrahydrofolate reductase polymerase chain reaction fragment revealed a significantly higher prevalence of a +/+ genotype among spina bifida patients and their mothers. The risk for spina bifida offspring is the strongest if both the mother and her child have the mutation in the homozygous state. Enzymatic analysis showed that homozygosity for the 677C-->T mutation causes a decreased 5,10-methylene tetrahydrofolate reductase activity, resulting in elevated plasma homocysteine and red blood cell folate levels and lowered plasma folate and cysteine values. This extended study demonstrates that a nucleotide substitution in the coding region of 5,10-methylene tetrahydrofolate reductase, resulting in reduced activity and an impaired homocysteine and folate metabolism, is a genetic risk factor for spina bifida.
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Affiliation(s)
- N M van der Put
- Department of Pediatrics, University Hospital Nijmegen, The Netherlands
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Goddijn-Wessel TA, Wouters MG, van de Molen EF, Spuijbroek MD, Steegers-Theunissen RP, Blom HJ, Boers GH, Eskes TK. Hyperhomocysteinemia: a risk factor for placental abruption or infarction. Eur J Obstet Gynecol Reprod Biol 1996; 66:23-9. [PMID: 8735754 DOI: 10.1016/0301-2115(96)02383-4] [Citation(s) in RCA: 176] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE To establish the prevalence of hyperhomocysteinemia in women with placental abruption or infarction. DESIGN Forty-six women with normal pregnancy outcome (controls) and 84 women with placental abruption or infarction (study group) were selected, and studied in the non-pregnant state. Homocysteine metabolism was investigated by a standardized oral methionine loading test. Hyperhomocysteinemia was defined as a concentration of fasting and/or postmethionine plasma homocysteine exceeding the estimated 97.5 percentile level of the controls. In the fasting state, the vitamin status was investigated by the measurement of serum and red cell folate, serum vitamin B12, and whole blood pyridoxal-5'-phosphate (PLP, an active form of vitamin B6). RESULTS Hyperhomocysteinemia was diagnosed in four controls (9%) and 26 women of the study group (31%, P < 0.05). The median concentrations of the vitamins studied were significantly lower in women of the study group as compared to the controls, except for red cell folate, where the median concentration was comparable in both groups. The median concentration of fasting plasma homocysteine, unlike post-methionine plasma homocysteine, was significantly higher in women who experienced placental abruption or infarction in their first pregnancy than in women who had the same event after one or more uncomplicated pregnancies. CONCLUSION Hyperhomocysteinemia is associated with placental abruption or infarction.
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Affiliation(s)
- T A Goddijn-Wessel
- Department of Obstetrics and Gynaecology, University Hospital Nijmegen St. Radboud, The Netherlands
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van der Put NM, Steegers-Theunissen RP, Frosst P, Trijbels FJ, Eskes TK, van den Heuvel LP, Mariman EC, den Heyer M, Rozen R, Blom HJ. Mutated methylenetetrahydrofolate reductase as a risk factor for spina bifida. Lancet 1995; 346:1070-1. [PMID: 7564788 DOI: 10.1016/s0140-6736(95)91743-8] [Citation(s) in RCA: 613] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Periconceptional folate supplementation reduces the risk of neural-tube defects. We studied the frequency of the 677C-->T mutation in the 5,10-methylenetetrahydrofolate reductase (MTHFR) gene in 55 patients with spina bifida and parents of such patients (70 mothers, 60 fathers). 5% of 207 controls were homozygous for the 677C-->T mutation compared with 16% of mothers, 10% of fathers, and 13% of patients. The mutation was associated with decreased MTHFR activity, low plasma folate, and high plasma homocysteine and red-cell folate concentrations. The 677C-->T mutation should be regarded as a genetic risk factor for spina bifida.
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Affiliation(s)
- N M van der Put
- Department of Pediatrics, University Hospital Nijmegen, Netherlands
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