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Diaz-Garcia H, Vilchis-Gil J, Castro-Cerritos KV, Rivera-Susunaga LE, Klünder-Klünder M, Granados-Riveron JT, Gómez-López J, López-Torres A, Sánchez-Urbina R. Association between maternal diet, smoking, and the placenta MTHFR 677C/T genotype and global placental DNA methylation. Placenta 2024; 146:17-24. [PMID: 38160599 DOI: 10.1016/j.placenta.2023.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 01/03/2024]
Abstract
INTRODUCTION The placenta provides nutrients to the fetus, and it has protective effects against harmful substances. Unhealthy maternal diets and toxic agents might increase free radical (FR) production. Elevated FR levels are associated with a high risk of oxidative stress, which may cause DNA damage. DNA might be oxidized in the placenta, occasionally affecting its methylation profile due to 8-hidroxy-2'-deoxyguanosine formation. METHODS This study assessed 130 mothers and their children. The maternal's nutritional patterns were determined using the Food Frequency Questionnaire. Information on smoking and alcohol consumption was collected during the medical examination. Data on placental DNA were obtained to determine the MTHFR 677C/T genotype and the proportion of placental DNA methylation (pDNAm). RESULTS Consumption of vitamins and folic acid was above 85%. The pDNAm was found to be correlated with gestational age and coffee intake. Mothers with a smoking history had a low pDNAm. Placentas with the TT genotype had a higher but not significant pDNAm. In the placentas with the CC/CT genotype, the pDNAm was positively associated with carbohydrate and biotin intake. However, the TT genotype was negatively associated with folate and vegetable intake. DISCUSSION The pDNAm was positively associated with coffee intake, but not with macro-, and micronutrient intake. However, it was negatively associated with cigarette smoking. The placentas with the CC/CT genotype had a lower pDNAm than those with the TT genotype. In the placentas with the CC/CT or TT genotype, methylation was positively, and negatively associated with micro- or macronutrients, respectively.
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Affiliation(s)
- Hector Diaz-Garcia
- Centro de Investigación en Malformaciones Congénitas, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico; Escuela Superior de Enfermería y Obstetricia, Instituto Politécnico Nacional, Mexico City 07738, Mexico
| | - Jenny Vilchis-Gil
- Unidad de Investigación Epidemiológica en Endocrinología y Nutrición, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico; Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | | | - Luis E Rivera-Susunaga
- Centro de Investigación en Malformaciones Congénitas, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico; Escuela Superior de Medicina del Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Miguel Klünder-Klünder
- Subdirección de la Gestión de la Investigación, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico
| | - Javier T Granados-Riveron
- Centro de Investigación en Malformaciones Congénitas, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico
| | - Jaqueline Gómez-López
- Hospital Militar de Especialidades de la Mujer y Neonatología, Secretaria de la Defensa Nacional, Mexico City 11200, Mexico
| | - Adolfo López-Torres
- Instituto de Química Aplicada, Universidad del Papaloapan, Tuxtepec, Oaxaca 68301, Mexico
| | - Rocío Sánchez-Urbina
- Centro de Investigación en Malformaciones Congénitas, Hospital Infantil de México Federico Gómez, Mexico City 06720, Mexico; Escuela Superior de Medicina del Instituto Politécnico Nacional, Mexico City 11340, Mexico.
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Kaur B, Sharma PK, Chatterjee B, Bissa B, Nattarayan V, Ramasamy S, Bhat A, Lal M, Samaddar S, Banerjee S, Roy SS. Defective quality control autophagy in Hyperhomocysteinemia promotes ER stress and consequent neuronal apoptosis through proteotoxicity. Cell Commun Signal 2023; 21:258. [PMID: 37749555 PMCID: PMC10518934 DOI: 10.1186/s12964-023-01288-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 08/19/2023] [Indexed: 09/27/2023] Open
Abstract
Homocysteine (Hcy), produced physiologically in all cells, is an intermediate metabolite of methionine and cysteine metabolism. Hyperhomocysteinemia (HHcy) resulting from an in-born error of metabolism that leads to accumulation of high levels of Hcy, is associated with vascular damage, neurodegeneration and cognitive decline. Using a HHcy model in neuronal cells, primary cortical neurons and transgenic zebrafish, we demonstrate diminished autophagy and Hcy-induced neurotoxicity associated with mitochondrial dysfunction, fragmentation and apoptosis. We find this mitochondrial dysfunction is due to Hcy-induced proteotoxicity leading to ER stress. We show this sustained proteotoxicity originates from the perturbation of upstream autophagic pathways through an aberrant activation of mTOR and that protetoxic stress act as a feedforward cues to aggravate a sustained ER stress that culminate to mitochondrial apoptosis in HHcy model systems. Using chemical chaperones to mitigate sustained ER stress, Hcy-induced proteotoxicity and consequent neurotoxicity were rescued. We also rescue neuronal lethality by activation of autophagy and thereby reducing proteotoxicity and ER stress. Our findings pave the way to devise new strategies for the treatment of neural and cognitive pathologies reported in HHcy, by either activation of upstream autophagy or by suppression of downstream ER stress. Video Abstract.
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Affiliation(s)
- Bhavneet Kaur
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
| | - Pradeep Kumar Sharma
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
- CSIR-Indian Institute of Toxicology Research, Lucknow, India
| | - Barun Chatterjee
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
| | - Bhawana Bissa
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Present address: Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, India
| | - Vasugi Nattarayan
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
| | - Soundhar Ramasamy
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
| | - Ajay Bhat
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
| | - Megha Lal
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India
| | | | | | - Soumya Sinha Roy
- CSIR-Institute of Genomics & Integrative Biology, Mathura Road, Sukhdev Vihar, New Delhi, 110020, India.
- Academy of Scientific & Innovative Research, Ghaziabad, 201002, India.
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Mohamed FA, Dheresa M, Raru TB, Yusuf N, Hassen TA, Mehadi A, Wilfong T, Tukeni KN, Kure MA, Roba KT. Determinants of neural tube defects among newborns in public referral hospitals in Eastern Ethiopia. BMC Nutr 2023; 9:93. [PMID: 37491389 PMCID: PMC10369744 DOI: 10.1186/s40795-023-00752-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 07/21/2023] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND Neural tube defects (NTDs) are serious brain and spine birth defects. Although NTDs are primarily pregnancy complications, such as abortion and stillbirth, they also contribute to under-five morbidity and mortality, as well as long-term disability and psychological impact. Despite these negative outcomes, the determinants of NTDs are not widely studied in Ethiopia, particularly in the country's east. As a result, we sought to identify the risk factors for NTDs in neonates born in public referral hospitals in eastern Ethiopia. METHODS A facility-based unmatched case-control study was carried out at Hiwot Fana Comprehensive Specialized Hospital and Sheik Hassen Yabare Jigjiga University Referral Hospital in Eastern Ethiopia. We included 59 cases identified in the selected facilities between September 10, 2021, and February 5, 2022, and 118 control neonates, with a case-to-control ratio of 1:2. Data were gathered through the use of interviewer-administered questionnaires and medical record review. To identify determinant factors of NTDs, a multivariable logistic regression model was used, which included all predictor variables from the bivariable analysis. The results were reported using an Adjusted Odds Ratio (AOR) with a 95% confidence interval. A p-value of < 0.05 was considered statistically significant. RESULTS In total, 59 cases of NTDs were identified out of 2915 live birth total births registered in the two hospitals, making the incidence of NTDs 202.4/10,000 births. In the final model analysis, determinant factors such as gender of newborn [AOR = 2.97; 95%CI(1.27, 6.92)], having no history of antenatal care[AOR = 4.45;95%CI(1.30,15.20)], having a poor food consumption score (AOR = 3.38;95% CI;1.06,10.72), having history of monotonous diet consumption (AOR = 4.80; 95%CI: 1.09, 9.08; P = 0.038), and coffee consumption of three or more cups per day during pregnancy (AOR = 3.84:95% CI: 1.23, 11.97) were statistically associated with NTDs. CONCLUSION Modifiable and non-modifiable determinants were identified as major contributors of neural tube defect in this study. Early screening, dietary intervention counseling to increase consumption of a healthy diet, coffee consumption reduction, and pre-pregnancy supplementation programs should be developed to reduce NTDs in Ethiopia.
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Affiliation(s)
- Fadumo Ahmed Mohamed
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | - Merga Dheresa
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, P.O.BOX: 235, Harar, Ethiopia
| | - Temam Bashir Raru
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | - Newas Yusuf
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | - Tahir Ahmed Hassen
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, P.O.BOX: 235, Harar, Ethiopia
| | - Ame Mehadi
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, P.O.BOX: 235, Harar, Ethiopia
| | - Tara Wilfong
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | | | - Mohammed Abdurke Kure
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, P.O.BOX: 235, Harar, Ethiopia
| | - Kedir Teji Roba
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, P.O.BOX: 235, Harar, Ethiopia.
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Wakoya R, Afework M. Burden of Neural Tube Defects and Their Associated Factors in Africa: A Systematic Review and Meta-Analysis. Int J Pediatr 2023; 2023:9635827. [PMID: 37388625 PMCID: PMC10307122 DOI: 10.1155/2023/9635827] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 05/21/2023] [Accepted: 06/03/2023] [Indexed: 07/01/2023] Open
Abstract
Background Neural tube defects are a type of congenital anomaly caused by an abnormality in the development of the brain and spinal cord during embryogenesis. They cause high rates of mortality, morbidity, and lifelong disability. There are several studies carried out worldwide reporting different findings on the burden and associated factors. The aim of this study is to carry out a systematic review and meta-analysis of the burden of neural tube defects and their associated factors in Africa. Methods A total of 58 eligible articles were identified systematically using databases such as PubMed, Embase, African Journal Online Library, ProQuest, Cochrane, Google Scopus, Google Scholar, and Grey literature. Extracted data were analyzed using STATA 16.0 statistical software. The heterogeneity of studies was determined using the Cochrane Q test statistic and I2 test statistics with forest plots. A random effects model was used to examine the pooled burden of neural tube defects, subgroups of the region, subtypes of NTDs, sensitivity analysis, and publication bias. The association between NTDs and associated factors was studied using a fixed-effect model. Results Fifty-eight studies with a total of 7,150,654 participants in 16 African countries revealed that the pooled burden of neural tube defects was 32.95 per 10,000 births (95% CI: 29.77-36.13). The Eastern African region had the highest burden in the subgroup analysis, with 111.13 per 10,000 births (95% CI: 91.85-130.42). South African countries had the lowest burden, at 11.43 per 10,000 births (95% CI: 7.51-15.34). In subtype analysis, spina bifida had the highest pooled burden at 17.01 per 10,000 births (95 percent CI: 15.00-19.00), while encephalocele had the lowest at 1.66 per 10,000 births (95% CI: 1.12-2.20). Maternal folic acid supplementation (AOR: 0.38; 95% CI: 0.16-0.94), alcohol consumption (AOR: 2.54; 95% CI: 1.08-5.96), maternal age (AOR: 3.54; 95% CI: 1.67-7.47), pesticide exposure (AOR: 2.69; 95% CI: 1.62-4.46), X-ray radiation (AOR: 2.67; 95% CI: 1.05-6.78), and history of stillbirth (AOR: 3.18; 95% CI: 1.11-9.12) were significantly associated with NTDs. Conclusion The pooled burden of NTDs in Africa was found to be high. Maternal age, alcohol consumption, pesticide and X-ray radiation exposure, history of stillbirth, and folic acid supplementation were significantly associated with NTDs.
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Affiliation(s)
- Reta Wakoya
- Department of Biomedical Science, Menelik II Medical and Health Science College, Addis Ababa, Ethiopia
- Department of Anatomy, School of Medicine, College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Mekbeb Afework
- Department of Anatomy, School of Medicine, College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
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Huang W, Yuan Z, Gu H. Exploring epigenomic mechanisms of neural tube defects using multi-omics methods and data. Ann N Y Acad Sci 2022; 1515:50-60. [PMID: 35666948 DOI: 10.1111/nyas.14802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Neural tube defects (NTDs) are a heterogeneous set of malformations attributed to disruption in normal neural tube closure during early embryogenesis. An in-depth understanding of NTD etiology and mechanisms remains elusive, however. Among the proposed mechanisms, epigenetic changes are thought to play an important role in the formation of NTDs. Epigenomics covers a wide spectrum of genomic DNA sequence modifications that can be investigated via high-throughput techniques. Recent advances in epigenomic technologies have enabled epigenetic studies of congenital malformations and facilitated the integration of big data into the understanding of NTDs. Herein, we review clinical epigenomic data that focuses on DNA methylation, histone modification, and miRNA alterations in human neural tissues, placental tissues, and leukocytes to explore potential mechanisms by which candidate genes affect human NTD pathogenesis. We discuss the links between epigenomics and gene regulatory mechanisms, and the effects of epigenetic alterations in human tissues on neural tube closure.
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Affiliation(s)
- Wanqi Huang
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
| | - Zhengwei Yuan
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
| | - Hui Gu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
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Tian T, Lai X, Xiang K, Han X, Yin S, Cabrera RM, Steele JW, Lei Y, Cao X, Finnell RH, Wang L, Ren A. Hypermethylation of PI3K-AKT signalling pathway genes is associated with human neural tube defects. Epigenetics 2022; 17:133-146. [PMID: 33491544 PMCID: PMC8865305 DOI: 10.1080/15592294.2021.1878725] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 12/25/2020] [Accepted: 01/07/2021] [Indexed: 10/22/2022] Open
Abstract
Neural tube defects (NTDs) are a group of common and severe congenital malformations. The PI3K-AKT signalling pathway plays a crucial role in the neural tube development. There is limited evidence concerning any possible association between aberrant methylation in PI3K-AKT signalling pathway genes and NTDs. Therefore, we aimed to investigate potential associations between aberrant methylation of PI3K-AKT pathway genes and NTDs. Methylation studies of PI3K-AKT pathway genes utilizing microarray genome-methylation data derived from neural tissues of ten NTD cases and eight non-malformed controls were performed. Targeted DNA methylation analysis was subsequently performed in an independent cohort of 73 NTD cases and 32 controls to validate the methylation levels of identified genes. siRNAs were used to pull-down the target genes in human embryonic stem cells (hESCs) to examine the effects of the aberrant expression of target genes on neural cells. As a result, 321 differentially hypermethylated CpG sites in the promoter regions of 30 PI3K-AKT pathway genes were identified in the microarray data. In target methylation analysis, CHRM1, FGF19, and ITGA7 were confirmed to be significantly hypermethylated in NTD cases and were associated with increased risk for NTDs. The down-regulation of FGF19, CHRM1, and ITGA7 impaired the formation of rosette-like cell aggregates. The down-regulation of those three genes affected the expression of PAX6, SOX2 and MAP2, implying their influence on the differentiation of neural cells. This study for the first time reported that hypermethylation of PI3K-AKT pathway genes such as CHRM1, FGF19, and ITGA7 is associated with human NTDs.
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Affiliation(s)
- Tian Tian
- Institute of Reproductive and Child Health, National Health Commission Key Laboratory of Reproductive Health, Peking University, Beijing, China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Xinyuan Lai
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Kuanhui Xiang
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Xiao Han
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Shengju Yin
- Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Robert M. Cabrera
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - John W. Steele
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Yunping Lei
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Xuanye Cao
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Richard H. Finnell
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Departments of Molecular and Human Genetics and Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Linlin Wang
- Institute of Reproductive and Child Health, National Health Commission Key Laboratory of Reproductive Health, Peking University, Beijing, China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Aiguo Ren
- Institute of Reproductive and Child Health, National Health Commission Key Laboratory of Reproductive Health, Peking University, Beijing, China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
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Qin J, Li J, Li F, Sun M, Wang T, Diao J, Zhang S, Luo L, Li Y, Chen L, Huang P, Zhu P. Association of maternal folate use and reduced folate carrier gene polymorphisms with the risk of congenital heart disease in offspring. Eur J Pediatr 2021; 180:3181-3190. [PMID: 33913025 DOI: 10.1007/s00431-021-04087-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/18/2021] [Accepted: 04/22/2021] [Indexed: 10/21/2022]
Abstract
Although it is generally recognized that genetic and environmental factors are associated with the risk of congenital heart disease (CHD), the mechanism remains largely uncertain. This study aimed to investigate the association of maternal folate use, the time when folate use was started, and polymorphisms of the reduced folate carrier (RFC1) gene with the risk of CHD in offspring of Chinese descent, which can help provide new insight into the etiology of folate-related birth defects. A case-control study of 683 mothers of CHD patients and 740 mothers of healthy children was performed. The present study showed that mothers who did not use folate were at a significantly increased risk of CHD (OR=2.04; 95% CI: 1.42-2.93). When compared with those who started using folate prior to conception, mothers who started using folate from the first trimester of pregnancy (OR=1.90; 95% CI: 1.43-2.54) or from the second trimester of pregnancy (OR=8.92; 95% CI: 4.20-18.97) had a significantly higher risk of CHD. Maternal RFC1 gene polymorphisms at rs2236484 (AG vs AA: OR=1.79 [95% CI: 1.33-2.39]; GG vs AA: OR=1.64 [95% CI: 1.15-2.35]) and rs2330183 (CT vs CC: OR=1.54 [95% CI: 1.14-2.09]) were also significantly associated with CHD risk. Additionally, the risk of CHD was significantly decreased among mothers who had variant genotypes but used folate when compared with those who had variant genotypes and did not use folate.Conclusion: In those of Chinese descent, maternal folate use and the time when use started are significantly associated with the risk of CHD in offspring. Furthermore, maternal folate supplementation may help to offset some of the risks of CHD in offspring due to maternal RFC1 genetic variants. What is Known: • Folate use could help prevent CHD, but the relationship between the time when folate use is started and CHD has not received sufficient attention. • Studies have assessed the associations of folate metabolism-related genes with CHD, but genes involved in cellular transportation of folate, such as the RFC1 gene, have not garnered enough attention. What is New: • In those of Chinese descents, the time when folate use is started is significantly associated with the risk of CHD in offspring. • Maternal RFC1 polymorphisms were significantly associated with the risk of CHD. • Folate supplementation may help to offset some risks of CHD due to RFC1 genetic variants.
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Affiliation(s)
- Jiabi Qin
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510100, Guangdong, China.,Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China.,NHC Key Laboratory of Birth Defect for Research and Prevention, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, China
| | - Jinqi Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Fang Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Mengting Sun
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Tingting Wang
- NHC Key Laboratory of Birth Defect for Research and Prevention, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, China
| | - Jingyi Diao
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Senmao Zhang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Liu Luo
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Yihuan Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Letao Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Peng Huang
- Hunan Children's Hospital, 86 Ziyuan Road, Changsha, 410007, Hunan, China.
| | - Ping Zhu
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510100, Guangdong, China.
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Wilson SL, Wallingford M. Epigenetic regulation of reproduction in human and in animal models. Mol Hum Reprod 2021; 27:6329199. [PMID: 34318322 DOI: 10.1093/molehr/gaab041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/07/2021] [Indexed: 12/24/2022] Open
Affiliation(s)
- Samantha L Wilson
- Princess Margaret Cancer Centre, University Health Network, Toronto Medical Discovery Tower, Toronto, ON, Canada
| | - Mary Wallingford
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, USA.,Division of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, MA, USA
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Petrone I, Bernardo PS, dos Santos EC, Abdelhay E. MTHFR C677T and A1298C Polymorphisms in Breast Cancer, Gliomas and Gastric Cancer: A Review. Genes (Basel) 2021; 12:587. [PMID: 33920562 PMCID: PMC8073588 DOI: 10.3390/genes12040587] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/08/2021] [Accepted: 04/15/2021] [Indexed: 02/07/2023] Open
Abstract
Folate (vitamin B9) is found in some water-soluble foods or as a synthetic form of folic acid and is involved in many essential biochemical processes. Dietary folate is converted into tetrahydrofolate, a vital methyl donor for most methylation reactions, including DNA methylation. 5,10-methylene tetrahydrofolate reductase (MTHFR) is a critical enzyme in the folate metabolism pathway that converts 5,10-methylenetetrahydrofolate into 5-methyltetrahydrofolate, which produces a methyl donor for the remethylation of homocysteine to methionine. MTHFR polymorphisms result in reduced enzyme activity and altered levels of DNA methylation and synthesis. MTHFR polymorphisms have been linked to increased risks of several pathologies, including cancer. Breast cancer, gliomas and gastric cancer are highly heterogeneous and aggressive diseases associated with high mortality rates. The impact of MTHFR polymorphisms on these tumors remains controversial in the literature. This review discusses the relationship between the MTHFR C677T and A1298C polymorphisms and the increased risk of breast cancer, gliomas, and gastric cancer. Additionally, we highlight the relevance of ethnic and dietary aspects of population-based studies and histological stratification of highly heterogeneous tumors. Finally, this review discusses these aspects as potential factors responsible for the controversial literature concerning MTHFR polymorphisms.
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Affiliation(s)
- Igor Petrone
- Stem Cell Laboratory, Center for Bone Marrow Transplants, Brazilian National Cancer Institute—INCA, Rio de Janeiro 20230-240, Brazil; (E.C.d.S.); (E.A.)
- Stricto Sensu Graduate Program in Oncology, INCA, Rio de Janeiro 20230-240, Brazil;
| | - Paula Sabbo Bernardo
- Stricto Sensu Graduate Program in Oncology, INCA, Rio de Janeiro 20230-240, Brazil;
- Laboratory of Cellular and Molecular Hemato-Oncology, Molecular Hemato-Oncology Program, Brazilian National Cancer Institute—INCA, Rio de Janeiro 20230-240, Brazil
| | - Everton Cruz dos Santos
- Stem Cell Laboratory, Center for Bone Marrow Transplants, Brazilian National Cancer Institute—INCA, Rio de Janeiro 20230-240, Brazil; (E.C.d.S.); (E.A.)
- Stricto Sensu Graduate Program in Oncology, INCA, Rio de Janeiro 20230-240, Brazil;
| | - Eliana Abdelhay
- Stem Cell Laboratory, Center for Bone Marrow Transplants, Brazilian National Cancer Institute—INCA, Rio de Janeiro 20230-240, Brazil; (E.C.d.S.); (E.A.)
- Stricto Sensu Graduate Program in Oncology, INCA, Rio de Janeiro 20230-240, Brazil;
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10
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Diet and Healthy Lifestyle in the Management of Gestational Diabetes Mellitus. Nutrients 2020; 12:nu12103050. [PMID: 33036170 PMCID: PMC7599681 DOI: 10.3390/nu12103050] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 12/16/2022] Open
Abstract
Gestational diabetes mellitus (GDM) among pregnant women increases the risk of both short-term and long-term complications, such as birth complications, babies large for gestational age (LGA), and type 2 diabetes in both mother and offspring. Lifestyle changes are essential in the management of GDM. In this review, we seek to provide an overview of the lifestyle changes which can be recommended in the management of GDM. The diet recommended for women with GDM should contain sufficient macronutrients and micronutrients to support the growth of the foetus and, at the same time, limit postprandial glucose excursions and encourage appropriate maternal gestational weight gain. Blood glucose excursions and hyperglycaemic episodes depend on carbohydrate-intake. Therefore, nutritional counselling should focus on the type, amount, and distribution of carbohydrates in the diet. Further, physical activity has beneficial effects on glucose and insulin levels and it can contribute to a better glycaemic control.
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11
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Piñuñuri R, Castaño-Moreno E, Llanos MN, Ronco AM. Epigenetic regulation of folate receptor-α (FOLR1) in human placenta of preterm newborns. Placenta 2020; 94:20-25. [PMID: 32421530 DOI: 10.1016/j.placenta.2020.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/05/2020] [Accepted: 03/21/2020] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Folates are essential nutrients for fetal development and pregnancy outcomes; they are transported to the fetus during gestation through specific folate transporters located in the placenta. In preterm newborns, we previously showed a lower placental mRNA expression of FOLR1 along with higher folate and lower vitamin B12 cord blood levels. Thereby we aimed to explore FOLR1 methylation in placentas of preterm newborns and hypothesized an increased FOLR1 methylation associated with cord blood folates and vitamin B12 concentrations. METHODS FOLR1 methylation and mRNA were determined by methylation sensitive - high resolution melting (MS-HRM) and by real-time PCR respectively, in two placental sides of placental tissues: maternal (basal, BP) and fetal plates (chorionic, CP) of moderate preterm infants (32-36 gestational age) and term birth (37-41 gestational weeks). Folates and vitamin B12 were determined by electrochemiluminescence in umbilical cord blood samples from term and preterm newborns. RESULTS We found that in preterm newborns, FOLR1 mRNA was lower in both plates of placenta compared with term newborns (p < 0,05) and was negatively associated with methylation of FOLR1 in CP. Preterm newborns presented higher folate and lower vitB12 concentrations in cord blood which correlated with increased placental FOLR1 methylation. DISCUSSION In preterm newborns, placental FOLR1 expression is regulated by epigenetic mechanisms and presumably by maternal concentrations of folate and vitamin B12.
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Affiliation(s)
- R Piñuñuri
- Laboratorio de Nutrición y Regulación Metabólica, Instituto de Nutrición y Tecnología de los Alimentos Doctor Fernando Monckeberg Barros (INTA)- Universidad de Chile, Santiago de Chile, Chile; Escuela de Nutrición y Dietética, Facultad de Salud, Universidad Bernardo O'Higgins, Santiago, Chile
| | - E Castaño-Moreno
- Laboratorio de Nutrición y Regulación Metabólica, Instituto de Nutrición y Tecnología de los Alimentos Doctor Fernando Monckeberg Barros (INTA)- Universidad de Chile, Santiago de Chile, Chile
| | - M N Llanos
- Laboratorio de Nutrición y Regulación Metabólica, Instituto de Nutrición y Tecnología de los Alimentos Doctor Fernando Monckeberg Barros (INTA)- Universidad de Chile, Santiago de Chile, Chile
| | - A M Ronco
- Laboratorio de Nutrición y Regulación Metabólica, Instituto de Nutrición y Tecnología de los Alimentos Doctor Fernando Monckeberg Barros (INTA)- Universidad de Chile, Santiago de Chile, Chile.
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12
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Wang Q, Zhang Q, Gan Z, Li H, Yang Y, Zhang Y, Zhao X. Screening for reproductive biomarkers in Bactrian camel via iTRAQ analysis of proteomes. Reprod Domest Anim 2020; 55:189-199. [PMID: 31840896 DOI: 10.1111/rda.13607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 12/04/2019] [Indexed: 12/20/2022]
Abstract
Bactrian camel is an ancient and precious species of livestock; that is, unique resources exist in the desert and have important economic and scientific value. In recent years, the number of Bactrian camels has declined sharply. Due to its long reproductive cycle and seasonal oestrus, the mechanism of oestrus is unknown. To identify candidate biomarkers of reproduction, we performed a comprehensive proteomic analysis of serum from Bactrian camel in oestrus and non-oestrus, using isobaric tags for relative and absolute quantitation (iTRAQ) coupled with tandem mass spectrometry. We identified 359 proteins, of which 32 were differentially expressed: 11 were up-regulated and 21 were down-regulated in samples from camels in oestrus. We validated the differential expression of a subset of these proteins using qPCR and Western blot. Gene ontology annotation identified that the differentially expressed proteins function in cellular processes, metabolic processes and immune system processes. Notably, five of the differentially expressed proteins, PCGF5, histone H1.2, RBP4, FOLR1 and ANTXR2, are involved in reproductive regulatory processes in other animals. KEGG enrichment analysis demonstrated significant enrichment in several cardiac-related pathways, such as 'dilated cardiomyopathy', 'hypertrophic cardiomyopathy', 'cardiac muscle contraction' and 'adrenergic signalling in cardiomyopathy'. Our results suggest that candidate biomarker (PCGF5, histone H1.2, RBP4, FOLR1 and ANTXR2) discovery can aid in understanding reproduction in Bactrian camels. We conclude that the profiling of serum proteomes, followed by the measurement of selected proteins using more targeted methods, offers a promising approach for studying mechanisms of oestrus.
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Affiliation(s)
- Qi Wang
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China
| | - Quanwei Zhang
- College of Life Science and Technology, Gansu Agriculture University, Lanzhou, China
| | - Ze Gan
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China
| | - Haijiang Li
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China
| | - Yang Yang
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China
| | - Yong Zhang
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China.,College of Life Science and Technology, Gansu Agriculture University, Lanzhou, China
| | - Xingxu Zhao
- College of Veterinary Medicine, Gansu Agriculture University, Lanzhou, China.,College of Life Science and Technology, Gansu Agriculture University, Lanzhou, China
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13
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Aiba T, Saito T, Hayashi A, Sato S, Yunokawa H, Fukami M, Hayashi Y, Mizuno K, Sato Y, Kojima Y, Ohsako S. Exploring disease-specific methylated CpGs in human male genital abnormalities by using methylated-site display-amplified fragment length polymorphism (MSD-AFLP). J Reprod Dev 2019; 65:491-497. [PMID: 31462596 PMCID: PMC6923155 DOI: 10.1262/jrd.2019-069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The incidence of male reproductive system disorders, especially hypospadias, has been increasing in developed countries since the latter half of the 20th century. Endocrine-disrupting chemicals from the environment are considered to be involved in hypospadias onset through epigenetic alterations. This pilot study aimed to explore disease-specific methylated CpGs in human patient samples using the methylated-site display-amplified fragment length polymorphism (MSD-AFLP) technique developed by our research group [1]. We compared clinical samples from hypospadias and phimosis patients. Foreskin and blood samples were collected from one- to two-year-old patients with hypospadias (N = 3) and phimosis (N = 3) during surgical treatment. MSD-AFLP analysis showed significantly decreased CpG-methylation levels of genes such as MYH11 and increased CpG-methylation levels of genes such as PLA2G15 in hypospadias patients. Hierarchical clustering analysis showed that genes with significantly altered CpG levels were more markedly altered in DNA from blood than from foreskin. Because of the small number of samples, further investigation is necessary to elucidate the association between variations in CpG levels in foreskin and blood DNA and male genital abnormalities. However, our MSD-AFLP method appears to be a useful tool for exploring disease-specific methylated-CpGs in human epidemiological studies.
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Affiliation(s)
- Toshiki Aiba
- Laboratory of Environmental Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan.,Department of Radiation Effects Research, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Toshiyuki Saito
- Department of Radiation Effects Research, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Akiko Hayashi
- Department of Radiation Effects Research, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | | | | | - Maki Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo 157-8535, Japan
| | - Yutaro Hayashi
- Department of Pediatric Urology, Nagoya City University, Graduate School of Medical Sciences, Nagoya 467-8601, Japan
| | - Kentaro Mizuno
- Department of Pediatric Urology, Nagoya City University, Graduate School of Medical Sciences, Nagoya 467-8601, Japan
| | - Yuichi Sato
- Department of Urology, Fukushima Medical University, School of Medicine, Fukushima 960-1295, Japan
| | - Yoshiyuki Kojima
- Department of Urology, Fukushima Medical University, School of Medicine, Fukushima 960-1295, Japan
| | - Seiichiroh Ohsako
- Laboratory of Environmental Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
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14
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Zhang H, Guo Y, Gu H, Wei X, Ma W, Liu D, Yu K, Luo W, Ma L, Liu Y, Xue J, Huang J, Wang Y, Jia S, Dong N, Wang H, Yuan Z. TRIM4 is associated with neural tube defects based on genome-wide DNA methylation analysis. Clin Epigenetics 2019; 11:17. [PMID: 30709423 PMCID: PMC6359777 DOI: 10.1186/s13148-018-0603-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 12/20/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Neural tube defects (NTDs) are complex abnormalities associated with gene-environment interactions. The underlying cause has not been determined. METHODS Spinal cord tissues from cases with NTDs and healthy controls were collected. Methylation patterns between cases and normal individuals were compared using 450K Infinium Methylation BeadChip Illumina. DNA methylation analysis by pyrosequencing (PyroMark Q96) and mRNA and protein expression were analyzed using real-time quantitative PCR and Western blotting, respectively. Next-generation and Sanger sequencing were used to determine genetic variants in the target genes. RESULTS Spinal cord tissues from cases with NTDs had more hypomethylated than hypermethylated genes. Further evaluation showed that the exon 1 region of TRIM4 was hypomethylated, and TRIM4 mRNA and protein levels were significantly increased in NTDs compared to controls. A rare missense variant (rs76665876) in TRIM4 was found in 3 of the 14 NTD cases but was not related to TRIM4 expression. TRIM4 mRNA levels were significantly increased in cases with hypomethylation and without the rs76665876 variant. CONCLUSION These findings suggest that spinal cord tissues in cases with NTDs had a different genome-wide methylation pattern compared to controls. Abnormal methylation patterns in TRIM4 in immunity pathways might be involved in NTD pathogenesis. Genetic variants in TRIM4 genes only slightly contribute to the etiology of human NTDs.
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Affiliation(s)
- Henan Zhang
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Yi Guo
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Hui Gu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Xiaowei Wei
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Wei Ma
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Dan Liu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Kun Yu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Wenting Luo
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Ling Ma
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Yusi Liu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Jia Xue
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Jieting Huang
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Yanfu Wang
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Shanshan Jia
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Naixuan Dong
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China
| | - Hongyan Wang
- Obstetrics and Gynecology Hospital, Key Lab of Reproduction Regulation of NPFPC in SIPPR, Institute of Reproduction and Development, Fudan University, Shanghai, People's Republic of China.
| | - Zhengwei Yuan
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, People's Republic of China.
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15
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Reza-López SA, Aguirre-Chacón EO, Sánchez-Ramírez B, Guerrero-Salgado F, Chávez-Corral DV, Levario-Carrillo M. Folate transporter expression in placenta from pregnancies complicated with birth defects. Birth Defects Res 2018; 110:1223-1227. [PMID: 30063111 DOI: 10.1002/bdr2.1356] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 04/23/2018] [Accepted: 05/02/2018] [Indexed: 11/12/2022]
Abstract
BACKGROUND Folate plays a fundamental role for fetal development, participating in cell division, embryogenesis, and fetal growth. The fetus depends on maternal supply of folate across the placenta. The objective of this study was to compare the expression of Folate Receptor-α (FR-α), Reduced Folate Carrier (RFC), and Proton Coupled Folate Transporter (PCFT) in placentas from pregnancies complicated with birth defects (BD) and controls. METHODS Case-control study, including placentas of BD-complicated pregnancies (n = 25) and a control group (n = 25). We determined the placental expression of FR-α, RFC, and PCFT by immunohistochemistry. Optical density was measured to obtain a relative quantification of the expression. RESULTS The expression of PCFT was greater in placentas from pregnancies complicated with BD than in those from the control group (p < .01). The expression of FR-α and RFC was not different between groups. CONCLUSION The expression of PCFT in placentas from BD-complicated pregnancies is increased, possibly as an adaptive response to increase the folate flux at the maternal-fetal interface.
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Affiliation(s)
- Sandra A Reza-López
- Facultad de Medicina y Ciencias Biomédicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Edwin O Aguirre-Chacón
- Facultad de Medicina y Ciencias Biomédicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Blanca Sánchez-Ramírez
- Programa de Maestría en Ciencias en Biotecnología, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Fabiola Guerrero-Salgado
- Programa de Maestría en Ciencias en Biotecnología, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Dora V Chávez-Corral
- Facultad de Medicina y Ciencias Biomédicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
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16
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Tian T, Wang L, Shen Y, Zhang B, Finnell RH, Ren A. Hypomethylation of GRHL3 gene is associated with the occurrence of neural tube defects. Epigenomics 2018; 10:891-901. [PMID: 29587534 DOI: 10.2217/epi-2018-0016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
AIM To investigate the relationship between GRHL3 methylation and the etiology of neural tube defects (NTDs). MATERIALS & METHODS Analyze data from a genome-wide DNA methylation array. Targeted DNA methylation analysis was performed for 46 cases and 23 controls. At last, grhl3 overexpression and gene depletion experiments were conducted in zebrafish. RESULTS Five hypomethylated CpGs were discovered in the methylation arrays performed on NTD cases. In a validation study, 15 hypomethylated CpGs were found and the overall methylation levels decreased in brain/spinal cord tissue from NTD cases. The knockdown and overexpression of grhl3 in zebrafish damaged embryonic convergent extension processes. CONCLUSION Hypomethylation of GRHL3 in central nervous tissue is associated with NTDs, further supporting the importance of GRHL3 and methylation in proper neural tube closure.
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Affiliation(s)
- Tian Tian
- Institute of Reproductive & Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology & Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, PR China
| | - Linlin Wang
- Institute of Reproductive & Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology & Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, PR China
| | - Yan Shen
- Key Laboratory of Cell Proliferation & Differentiation of Ministry of Education, College of Life Sciences, Peking University, Beijing, PR China
| | - Bo Zhang
- Key Laboratory of Cell Proliferation & Differentiation of Ministry of Education, College of Life Sciences, Peking University, Beijing, PR China
| | - Richard H Finnell
- Departments of Molecular & Cellular Biology & Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Aiguo Ren
- Institute of Reproductive & Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology & Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, PR China
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17
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Mandaviya PR, Aïssi D, Dekkers KF, Joehanes R, Kasela S, Truong V, Stolk L, Heemst DV, Ikram MA, Lindemans J, Slagboom PE, Trégouët DA, Uitterlinden AG, Wei C, Wells P, Gagnon F, van Greevenbroek MM, Heijmans BT, Milani L, Morange PE, van Meurs JB, Heil SG. Homocysteine levels associate with subtle changes in leukocyte DNA methylation: an epigenome-wide analysis. Epigenomics 2017; 9:1403-1422. [PMID: 28990796 DOI: 10.2217/epi-2017-0038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
AIM Homocysteine (Hcy) is a sensitive marker of one-carbon metabolism. Higher Hcy levels have been associated with global DNA hypomethylation. We investigated the association between plasma Hcy and epigenome-wide DNA methylation in leukocytes. METHODS Methylation was measured using Illumina 450 k arrays in 2035 individuals from six cohorts. Hcy-associated differentially methylated positions and regions were identified using meta-analysis. RESULTS Three differentially methylated positions cg21607669 (SLC27A1), cg26382848 (AJUBA) and cg10701000 (KCNMA1) at chromosome 19, 14 and 10, respectively, were significantly associated with Hcy. In addition, we identified 68 Hcy-associated differentially methylated regions, the most significant of which was a 1.8-kb spanning domain (TNXB/ATF6B) at chromosome 6. CONCLUSION We identified novel epigenetic loci associated with Hcy levels, of which specific role needs to be further validated.
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Affiliation(s)
- Pooja R Mandaviya
- Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands.,Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Dylan Aïssi
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France.,ICAN Institute for Cardiometabolism & Nutrition, Paris, France
| | - Koen F Dekkers
- Molecular Epidemiology Section, Department of Medical Statistics & Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands
| | - Roby Joehanes
- Institute for Aging Research, Hebrew SeniorLife, Harvard Medical School, Boston, MA, USA
| | - Silva Kasela
- Estonian Genome Center, University of Tartu, Tartu, Estonia.,Institute of Molecular & Cell Biology, University of Tartu, Tartu, Estonia
| | - Vinh Truong
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Lisette Stolk
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Diana van Heemst
- Department of Gerontology & Geriatrics Section, Leiden University Medical Center, Leiden, The Netherlands
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Jan Lindemans
- Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - P Eline Slagboom
- Molecular Epidemiology Section, Department of Medical Statistics & Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands
| | - David-Alexandre Trégouët
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France.,ICAN Institute for Cardiometabolism & Nutrition, Paris, France
| | - André G Uitterlinden
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Chen Wei
- Department of Epidemiology, Tulane University, New Orleans, LA, USA
| | - Phil Wells
- Department of Medicine, Ottawa Hospital Research Institute, Ottawa, Canada
| | - France Gagnon
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Marleen Mj van Greevenbroek
- Department of Internal Medicine & School for Cardiovascular Diseases (CARIM), Maastricht University Medical Center, Maastricht, The Netherlands
| | - Bastiaan T Heijmans
- Molecular Epidemiology Section, Department of Medical Statistics & Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands
| | - Lili Milani
- Estonian Genome Center, University of Tartu, Tartu, Estonia
| | - Pierre-Emmanuel Morange
- Laboratory of Haematology, La Timone Hospital, Marseille, France.,Institut National pour la Santé et la Recherche Médicale (INSERM), Unité Mixte de Recherche en Santé (UMR_S) 1062, Nutrition Obesity & Risk of Thrombosis, Aix-Marseille University, Marseille, France
| | - Joyce Bj van Meurs
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Sandra G Heil
- Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands
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19
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Wang L, Lin S, Zhang J, Tian T, Jin L, Ren A. Fetal DNA hypermethylation in tight junction pathway is associated with neural tube defects: A genome-wide DNA methylation analysis. Epigenetics 2017; 12:157-165. [PMID: 28059605 DOI: 10.1080/15592294.2016.1277298] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Neural tube defects (NTDs) are a spectrum of severe congenital malformations of fusion failure of the neural tube during early embryogenesis. Evidence on aberrant DNA methylation in NTD development remains scarce, especially when exposure to environmental pollutant is taken into consideration. DNA methylation profiling was quantified using the Infinium HumanMethylation450 array in neural tissues from 10 NTD cases and 8 non-malformed controls (stage 1). Subsequent validation was performed using a Sequenom MassARRAY system in neural tissues from 20 NTD cases and 20 non-malformed controls (stage 2). Correlation analysis of differentially methylated CpG sites in fetal neural tissues and polycyclic aromatic hydrocarbons concentrations in fetal neural tissues and maternal serum was conducted. Differentially methylated CpG sites of neural tissues were further validated in fetal mice with NTDs induced by benzo(a)pyrene given to pregnant mice. Differentially hypermethylated CpG sites in neural tissues from 17 genes and 6 pathways were identified in stage 1. Subsequently, differentially hypermethylated CpG sites in neural tissues from 6 genes (BDKRB2, CTNNA1, CYFIP2, MMP7, MYH2, and TIAM2) were confirmed in stage 2. Correlation analysis showed that methylated CpG sites in CTNNA1 and MYH2 from NTD cases were positively correlated to polycyclic aromatic hydrocarbon level in fetal neural tissues and maternal serum. The correlation was confirmed in NTD-affected fetal mice that were exposed to benzo(a)pyrene in utero. In conclusion, hypermethylation of the CTNNA1 and MYH2 genes in tight junction pathway is associated with the risk for NTDs, and the DNA methylation aberration may be caused by exposure to benzo(a)pyrene.
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Affiliation(s)
- Linlin Wang
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
| | - Shanshan Lin
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
| | - Ji Zhang
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
| | - Tian Tian
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
| | - Lei Jin
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
| | - Aiguo Ren
- a Institute of Reproductive and Child Health, School of Public Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China , Beijing , China
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20
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Ma FF, Cao DD, Ouyang S, Tang R, Liu Z, Li Y, Wu J. Hypermethylation of AKT2 gene is associated with neural-tube defects in fetus. Placenta 2016; 48:80-86. [PMID: 27871477 DOI: 10.1016/j.placenta.2016.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 09/26/2016] [Accepted: 10/17/2016] [Indexed: 01/18/2023]
Abstract
INTRODUCTION Neural-tube defects (NTDs) are common birth defects of complex etiology. Although many studies have confirmed a genetic component, the exact mechanism between DNA methylation and NTDs remains unclear. METHODS In this work, we investigated the alteration of methylation from placental tissues obtained from 152 normal infants or with NTDs in 130 children with neural-tube defects. Genome-wide changes in DNA methylation were measured using the NimbleGen microarray. The expression levels of 12 genes were also determined, and two genes (AKT2 and CDC25C) showed low expression in NTDs by quantitative real-time PCR analysis. Then, the methyhlated region of AKT2 promoter sequences were confirmed by massARRAY. RESULTS A total of 150 differentially methylated regions (81 low methylated regions and 69 high methylated regions) were selected by microarray. The expression levels of AKT2 and CDC25C showed lower expression in NTDs. And the percentage of methyhlated region of AKT2 promoter were increased in NTDs. CONCLUSIONS DNA mythelation was one of the possible epigenetic variations correlated with the occurrence of NTDs, and AKT2 may be a candidate gene for NTDs.
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Affiliation(s)
- Fei Fei Ma
- Dept. of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China
| | - Ding Ding Cao
- Dept. of Biochemistry, Capital Institute of Pediatrics-Peking University Teaching Hospital, Beijing 100020, China
| | - Shengrong Ouyang
- Dept. of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China
| | - Renqiao Tang
- Graduate School, Chinese Academy of Medical Science, Beijing 100730, China
| | - Zhuo Liu
- Dept. of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China
| | - Yuanyuan Li
- Dept. of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China
| | - Jianxin Wu
- Dept. of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China; Dept. of Biochemistry, Capital Institute of Pediatrics-Peking University Teaching Hospital, Beijing 100020, China.
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Methylome analysis for spina bifida shows SOX18 hypomethylation as a risk factor with evidence for a complex (epi)genetic interplay to affect neural tube development. Clin Epigenetics 2016; 8:108. [PMID: 27757173 PMCID: PMC5064967 DOI: 10.1186/s13148-016-0272-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/24/2016] [Indexed: 12/21/2022] Open
Abstract
Background Neural tube defects (NTDs) are severe congenital malformations that arise from failure of neurulation during early embryonic development. The molecular basis underlying most human NTDs still remains largely unknown. Based on the hypothesis that folic acid prevents NTDs by stimulating methylation reactions, DNA methylation changes could play a role in NTDs. We performed a methylome analysis for patients with myelomeningocele (MMC). Using a candidate CpG analysis for HOX genes, a significant association between HOXB7 hypomethylation and MMC was found. Methods In the current study, we analyzed leukocyte methylome data of ten patients with MMC and six controls using Illumina Methylation Analyzer and WateRmelon R-packages and performed validation studies using larger MMC and control cohorts with Sequenom EpiTYPER. Results The methylome analysis showed 75 CpGs in 45 genes that are significantly differentially methylated in MMC patients. CpG-specific methylation differences were next replicated for the top six candidate genes ABAT, CNTNAP1, SLC1A6, SNED1, SOX18, and TEPP but only for the SOX18 locus a significant overall hypomethylation was observed (P value = 0.0003). Chemically induced DNA demethylation in HEK cells resulted in SOX18 hypomethylation and increased expression. Injection of sox18 mRNA in zebrafish resulted in abnormal neural tube formation. Quantification of DNA methylation for the SOX18 locus was also determined for five families where parents had normal methylation values compared to significant lower values for both the MMC as their non-affected child. SOX18 methylation studies were performed for a MMC patient with a paternally inherited chromosomal deletion that includes BMP4. The patient showed extreme SOX18 hypomethylation similar to his healthy mother while his father had normal methylation values. Conclusions This is the first genome-wide methylation study in leukocytes for patients with NTDs. We report SOX18 as a novel MMC risk gene but our findings also suggest that SOX18 hypomethylation must interplay with environmental and (epi)genetic factors to cause NTDs. Further studies are needed that combine methylome data with next-generation sequencing approaches to unravel NTD etiology. Electronic supplementary material The online version of this article (doi:10.1186/s13148-016-0272-8) contains supplementary material, which is available to authorized users.
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22
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Cadmium-induced neural tube defects and fetal growth restriction: Association with disturbance of placental folate transport. Toxicol Appl Pharmacol 2016; 306:79-85. [DOI: 10.1016/j.taap.2016.07.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 06/30/2016] [Accepted: 07/08/2016] [Indexed: 10/21/2022]
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23
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Henning AN, Haag JD, Smits BMG, Gould MN. The Non-coding Mammary Carcinoma Susceptibility Locus, Mcs5c, Regulates Pappa Expression via Age-Specific Chromatin Folding and Allele-Dependent DNA Methylation. PLoS Genet 2016; 12:e1006261. [PMID: 27537370 PMCID: PMC4990333 DOI: 10.1371/journal.pgen.1006261] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 07/26/2016] [Indexed: 11/19/2022] Open
Abstract
In understanding the etiology of breast cancer, the contributions of both genetic and environmental risk factors are further complicated by the impact of breast developmental stage. Specifically, the time period ranging from childhood to young adulthood represents a critical developmental window in a woman’s life when she is more susceptible to environmental hazards that may affect future breast cancer risk. Although the effects of environmental exposures during particular developmental Windows of Susceptibility (WOS) are well documented, the genetic mechanisms governing these interactions are largely unknown. Functional characterization of the Mammary Carcinoma Susceptibility 5c, Mcs5c, congenic rat model of breast cancer at various stages of mammary gland development was conducted to gain insight into the interplay between genetic risk factors and WOS. Using quantitative real-time PCR, chromosome conformation capture, and bisulfite pyrosequencing we have found that Mcs5c acts within the mammary gland to regulate expression of the neighboring gene Pappa during a critical mammary developmental time period in the rat, corresponding to the human young adult WOS. Pappa has been shown to positively regulate the IGF signaling pathway, which is required for proper mammary gland/breast development and is of increasing interest in breast cancer pathogenesis. Mcs5c-mediated regulation of Pappa appears to occur through age-dependent and mammary gland-specific chromatin looping, as well as genotype-dependent CpG island shore methylation. This represents, to our knowledge, the first insight into cellular mechanisms underlying the WOS phenomenon and demonstrates the influence developmental stage can have on risk locus functionality. Additionally, this work represents a novel model for further investigation into how environmental factors, together with genetic factors, modulate breast cancer risk in the context of breast developmental stage. A woman’s lifetime risk of developing breast cancer is affected by both genetic and environmental risk factors that can be further exacerbated by breast developmental stage. Time periods conferring increased risk are referred to as Windows of Susceptibility (WOS) and, generally speaking, the molecular mechanisms responsible for their effect on breast cancer risk are unknown. Our work presented here on the characterization of the rat Mammary Carcinoma Susceptibility 5c, Mcs5c, locus has identified a region within Mcs5c that interacts with the neighboring gene, Pappa, in an age-dependent manner to influence gene expression via genotype-dependent DNA methylation. Importantly, Mcs5c-mediated gene regulation occurs specifically within a WOS, and these finding represent the first identified molecular mechanisms by which a WOS influences the ability of a locus to affect mammary/breast cancer risk. This work highlights the importance developmental stage can have on genetic risk factor function, and we anticipate that the Mcs5c locus will serve as a model for future studies on WOS in combination with genetic and environmental risk factors.
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Affiliation(s)
- Amanda N. Henning
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin–Madison School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Jill D. Haag
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin–Madison School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Bart M. G. Smits
- Department of Pathology and Laboratory Medicine, Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Michael N. Gould
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin–Madison School of Medicine and Public Health, Madison, Wisconsin, United States of America
- * E-mail:
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Price EM, Peñaherrera MS, Portales-Casamar E, Pavlidis P, Van Allen MI, McFadden DE, Robinson WP. Profiling placental and fetal DNA methylation in human neural tube defects. Epigenetics Chromatin 2016; 9:6. [PMID: 26889207 PMCID: PMC4756451 DOI: 10.1186/s13072-016-0054-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 01/25/2016] [Indexed: 12/16/2022] Open
Abstract
Background The incidence of neural tube defects (NTDs) declined by about 40 % in Canada with the introduction of a national folic acid (FA) fortification program. Despite the fact that few Canadians currently exhibit folate deficiency, NTDs are still the second most common congenital abnormality. FA fortification may have aided in reducing the incidence of NTDs by overcoming abnormal one carbon metabolism cycling, the process which provides one carbon units for methylation of DNA. We considered that NTDs persisting in a folate-replete population may also occur in the context of FA-independent compromised one carbon metabolism, and that this might manifest as abnormal DNA methylation (DNAm). Second trimester human placental chorionic villi, kidney, spinal cord, brain, and muscle were collected from 19 control, 22 spina bifida, and 15 anencephalic fetuses in British Columbia, Canada. DNA was extracted, assessed for methylenetetrahydrofolate reductase (MTHFR) genotype and for genome-wide DNAm using repetitive elements, in addition to the Illumina Infinium HumanMethylation450 (450k) array. Results No difference in repetitive element DNAm was noted between NTD status groups. Using a false discovery rate <0.05 and average group difference in DNAm ≥0.05, differentially methylated array sites were identified only in (1) the comparison of anencephaly to controls in chorionic villi (n = 4 sites) and (2) the comparison of spina bifida to controls in kidney (n = 3342 sites). Conclusions We suggest that the distinctive DNAm of spina bifida kidneys may be consequent to the neural tube defect or reflective of a common etiology for abnormal neural tube and renal development. Though there were some small shifts in DNAm in the other tested tissues, our data do not support the long-standing hypothesis of generalized altered genome-wide DNAm in NTDs. This finding may be related to the fact that most Canadians are not folate deficient, but it importantly opens the field to the investigation of other epigenetic and non-epigenetic mechanisms in the etiology of NTDs. Electronic supplementary material The online version of this article (doi:10.1186/s13072-016-0054-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- E Magda Price
- Child and Family Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 UK ; Dept of Medical Genetics, University of British Columbia, C201-4500 Oak St, Vancouver, BC V6H 3N1 UK ; Dept of Obstetrics and Gynaecology, University of British Columbia, C420-4500 Oak St, Vancouver, BC V6H 3N1 UK
| | - Maria S Peñaherrera
- Child and Family Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 UK ; Dept of Medical Genetics, University of British Columbia, C201-4500 Oak St, Vancouver, BC V6H 3N1 UK
| | | | - Paul Pavlidis
- Centre for High-Throughput Biology, University of British Columbia, 2185 East Mall, Vancouver, V6T 1Z4 UK ; Dept of Psychiatry, University of British Columbia, 2255 Wesbrook Mall, Vancouver, BC V6T 2A1 UK
| | - Margot I Van Allen
- Dept of Medical Genetics, University of British Columbia, C201-4500 Oak St, Vancouver, BC V6H 3N1 UK
| | - Deborah E McFadden
- Dept of Medical Genetics, University of British Columbia, C201-4500 Oak St, Vancouver, BC V6H 3N1 UK ; Dept of Pathology and Laboratory Medicine, Rm G227-2211, Wesbrook Mall, Vancouver, BC V6T 2B5 UK
| | - Wendy P Robinson
- Child and Family Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 UK ; Dept of Medical Genetics, University of British Columbia, C201-4500 Oak St, Vancouver, BC V6H 3N1 UK
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Sonic Hedgehog Signaling Affected by Promoter Hypermethylation Induces Aberrant Gli2 Expression in Spina Bifida. Mol Neurobiol 2015; 53:5413-24. [PMID: 26446020 DOI: 10.1007/s12035-015-9447-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 09/16/2015] [Indexed: 02/06/2023]
Abstract
GLI2 is a key mediator of the sonic hedgehog (Shh) signaling pathway and plays an important role in neural tube development during vertebrate embryogenesis; however, the role of gli2 in human folate-related neural tube defects remains unclear. In this study, we compared methylation status and polymorphisms of gli2 between spina bifida patients and a control group to explore the underlying mechanisms related to folate deficiency in spina bifida. No single nucleotide polymorphism was found to be significantly different between the two groups, although gli2 methylation levels were significantly increased in spina bifida samples, accompanied by aberrant GLI2 expression. Moreover, a prominent negative correlation was found between the folate level in brain tissue and the gli2 methylation status (r = -0.41, P = 0.014), and gli2 hypermethylation increased the risk of spina bifida with an odds ratio of 12.45 (95 % confidence interval: 2.71-57.22, P = 0.001). In addition, we established a cell model to illustrate the effect of gli2 expression and the accessibility of chromatin affected by methylation. High gli2 and gli1 mRNA expression was detected in 5-Aza-treated cells, while gli2 hypermethylation resulted in chromatin inaccessibility and a reduced association with nuclear proteins containing transcriptional factors. More meaningful to the pathway, the effect gene of the Shh pathway, gli1, was found to have a reduced level of expression along with a decreased expression of gli2 in our cell model. Aberrant high methylation resulted in the low expression of gli2 in spina bifida, which was affected by the change in chromatin status and the capacity of transcription factor binding.
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Chen YH, Yu Z, Fu L, Xia MZ, Zhao M, Wang H, Zhang C, Hu YF, Tao FB, Xu DX. Supplementation with vitamin D3 during pregnancy protects against lipopolysaccharide-induced neural tube defects through improving placental folate transportation. Toxicol Sci 2015; 145:90-7. [PMID: 25673501 PMCID: PMC4833037 DOI: 10.1093/toxsci/kfv036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Several reports demonstrated that maternal lipopolysaccharide (LPS) exposure at middle gestational stage caused neural tube defects (NTDs). This study investigated the effects of supplementation with vitamin D3 (VitD3) during pregnancy on LPS-induced NTDs. Pregnant mice except controls were ip injected with LPS (25 μg/kg) daily from gestational day (GD)8 to GD12. In LPS+VitD3 group, pregnant mice were orally administered with VitD3 (25 μg/kg) before LPS injection. As expected, a 5-day LPS injection resulted in 62.5% (10/16) of dams and 20.3% of fetuses with NTDs. Additional experiment showed that a 5-day LPS injection downregulated placental proton-coupled folate transporter (pcft) and reduced folate carrier 1 (rfc1), 2 major folate transporters in placentas. Consistent with downregulation of placental folate transporters, folate transport from maternal circulation into embryos was disturbed in LPS-treated mice. Interestingly, VitD3 not only inhibited placental inflammation but also attenuated LPS-induced downregulation of placental folate transporters. Correspondingly, VitD3 markedly improved folate transport from maternal circulation into the embryos. Importantly, supplementation with VitD3 during pregnancy protected mice from LPS-induced NTDs. Taken together, these results suggest that supplementation with VitD3 during pregnancy prevents LPS-induced NTDs through inhibiting placental inflammation and improving folate transport from maternal circulation into the embryos.
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Affiliation(s)
- Yuan-Hua Chen
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Zhen Yu
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Lin Fu
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Mi-Zhen Xia
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Mei Zhao
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Hua Wang
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Cheng Zhang
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Yong-Fang Hu
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - Fang-Biao Tao
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
| | - De-Xiang Xu
- *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China *Department of Toxicology, Anhui Provincial Key Laboratory of Population Health & Aristogenics, School of Basic Medical Science and School of Life Science, Anhui Medical University, Hefei 230032, China
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27
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DNA methylation and expression of the folate transporter genes in colorectal cancer. Tumour Biol 2015; 36:5581-90. [PMID: 25697897 DOI: 10.1007/s13277-015-3228-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/05/2015] [Indexed: 12/20/2022] Open
Abstract
Folate has a central role in the cell metabolism. This study aims to explore the DNA methylation pattern of the folate transporter genes FOLR1, PCFT, and RFC1 as well as the corresponding protein expressions in colorectal cancer (CRC) tissue and adjacent non-cancerous mucosa (ANCM). Our results showed statistically significant differences in the DNA-methylated fraction of all three genes at several gene regions; we identified three differentially methylated CpG sites in the FOLR1 gene, five CpG sites in the PCFT gene, and six CpG sites in the RFC1 gene. There was a pronounced expression of the FRα and RFC proteins in both the CRC and ANCM tissues, though the expression was attenuated in cancer compared to the paired ANCM tissues. The PCFT protein was undetectable or expressed at a very low level in both tissue types. Higher methylated fractions of the CpG sites 3-5 in the RFC1 gene were associated with a lower protein expression, suggestive of epigenetic regulation by DNA methylation of the RFC1 gene in the colorectal cancer. Our results did not show any association between the RFC and FRα protein expression and tumor stage, TNM classification, or tumor location. In conclusion, this is the first study to simultaneously evaluate both DNA methylation and protein expression of all three folate transporter genes, FOLR1, PCFT, and RFC1, in colorectal cancer. The results encourage further investigation into the possible prognostic implications of folate transporter expression and DNA methylation.
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28
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Mandaviya PR, Stolk L, Heil SG. Homocysteine and DNA methylation: a review of animal and human literature. Mol Genet Metab 2014; 113:243-52. [PMID: 25456744 DOI: 10.1016/j.ymgme.2014.10.006] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/04/2014] [Accepted: 10/04/2014] [Indexed: 11/28/2022]
Abstract
Homocysteine (Hcy) is a sulfur-containing non-protein forming amino acid, which is synthesized from methionine as an important intermediate in the one-carbon pathway. High concentrations of Hcy in a condition called hyperhomocysteinemia (HHcy) are an independent risk factor for several disorders including cardiovascular diseases and osteoporotic fractures. Since Hcy is produced as a byproduct of the methyltransferase reaction, alteration in DNA methylation is studied as one of the underlying mechanisms of HHcy-associated disorders. In animal models, elevated Hcy concentrations are induced either by diet (high methionine, low B-vitamins, or both), gene knockouts (Mthfr, Cbs, Mtrr or Mtr) or combination of both to investigate their effects on DNA methylation or its markers. In humans, most of the literature involves case-control studies concerning patients. The focus of this review is to study existing literature on HHcy and its role in relation to DNA methylation. Apart from this, a few studies investigated the effect of Hcy-lowering trials on restoring DNA methylation patterns, by giving a folic acid or B-vitamin supplemented diet. These studies which were conducted in animal models as well as humans were included in this review.
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Affiliation(s)
- Pooja R Mandaviya
- Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
| | - Lisette Stolk
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
| | - Sandra G Heil
- Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands.
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Fu L, Yu Z, Chen YH, Xia MZ, Wang H, Zhang C, Tao FB, Xu DX. Orally administered melatonin prevents lipopolysaccharide-induced neural tube defects in mice. PLoS One 2014; 9:e113763. [PMID: 25420102 PMCID: PMC4242665 DOI: 10.1371/journal.pone.0113763] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 10/29/2014] [Indexed: 01/06/2023] Open
Abstract
Lipopolysaccharide (LPS) has been associated with adverse pregnant outcomes, including fetal demise, intra-uterine growth restriction (IUGR), neural tube defects (NTDs) and preterm delivery in rodent animals. Previous studies demonstrated that melatonin protected against LPS-induced fetal demise, IUGR and preterm delivery. The aim of the present study was to investigate the effects of melatonin on LPS-induced NTDs. All pregnant mice except controls were intraperitoneally injected with LPS (25 µg/kg) daily from gestational day (GD)8 to GD12. Some pregnant mice were orally administered with melatonin (MT, 50 mg/kg) before each LPS injection. A five-day LPS injection resulted in 27.5% of fetuses with anencephaly, exencephaly or encephalomeningocele. Additional experiment showed that maternal LPS exposure significantly down-regulated placental proton-coupled folate transporter (pcft) and disturbed folate transport from maternal circulation through the placentas into the fetus. Interestingly, melatonin significantly attenuated LPS-induced down-regulation of placental pcft. Moreover, melatonin markedly improved the transport of folate from maternal circulation through the placentas into the fetus. Correspondingly, orally administered melatonin reduced the incidence of LPS-induced anencephaly, exencephaly or encephalomeningocele. Taken together, these results suggest that orally administered melatonin prevents LPS-induced NTDs through alleviating LPS-induced disturbance of folate transport from maternal circulation through the placenta into the fetus.
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Affiliation(s)
- Lin Fu
- Department of Toxicology, Anhui Medical University, Hefei, China
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Anhui Medical University, Hefei, China
| | - Zhen Yu
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Yuan-Hua Chen
- Department of Toxicology, Anhui Medical University, Hefei, China
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Anhui Medical University, Hefei, China
| | - Mi-Zhen Xia
- School of Life Science, Anhui Medical University, Hefei, China
| | - Hua Wang
- Department of Toxicology, Anhui Medical University, Hefei, China
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Anhui Medical University, Hefei, China
| | - Cheng Zhang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Fang-Biao Tao
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Anhui Medical University, Hefei, China
- * E-mail: (FBT); (DXX)
| | - De-Xiang Xu
- Department of Toxicology, Anhui Medical University, Hefei, China
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Anhui Medical University, Hefei, China
- * E-mail: (FBT); (DXX)
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Williams SD, Hughes TE, Adler CJ, Brook AH, Townsend GC. Epigenetics: a new frontier in dentistry. Aust Dent J 2014; 59 Suppl 1:23-33. [DOI: 10.1111/adj.12155] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- SD Williams
- School of Dentistry; The University of Adelaide; South Australia Australia
| | - TE Hughes
- School of Dentistry; The University of Adelaide; South Australia Australia
| | - CJ Adler
- Institute of Dental Research; Westmead Millennium Institute; Faculty of Dentistry; The University of Sydney; New South Wales Australia
| | - AH Brook
- School of Dentistry; The University of Adelaide; South Australia Australia
- Institute of Dentistry; Queen Mary University of London; United Kingdom
| | - GC Townsend
- School of Dentistry; The University of Adelaide; South Australia Australia
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Bhargava S, Tyagi SC. Nutriepigenetic regulation by folate-homocysteine-methionine axis: a review. Mol Cell Biochem 2013; 387:55-61. [PMID: 24213682 DOI: 10.1007/s11010-013-1869-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 10/17/2013] [Indexed: 01/13/2023]
Abstract
Although normally folic acid is given during pregnancy, presumably to prevent neural tube defects, the mechanisms of this protection are unknown. More importantly it is unclear whether folic acid has other function during development. It is known that folic acid re-methylates homocysteine (Hcy) to methionine by methylene tetrahydrofolate reductase-dependent pathways. Folic acid also generates high-energy phosphates, behaves as an antioxidant and improves nitric oxide (NO) production by endothelial NO synthase. Interestingly, during epigenetic modification, methylation of DNA/RNA generate homocysteine unequivocally. The enhanced overexpression of methyl transferase lead to increased yield of Hcy. The accumulation of Hcy causes vascular dysfunction, reduces perfusion in the muscles thereby causing musculopathy. Another interesting fact is that children with severe hyperhomocysteinaemia (HHcy) have skeletal deformities, and do not live past teenage. HHcy is also associated with the progeria syndrome. Epilepsy is primarily caused by inhibition of gamma-amino-butyric-acid (GABA) receptor, an inhibitory neurotransmitter in the neuronal synapse. Folate deficiency leads to HHcy which then competes with GABA for binding on the GABA receptors. With so many genetic and clinical manifestations associated with folate deficiency, we propose that folate deficiency induces epigenetic alterations in the genes and thereby results in disease.
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Affiliation(s)
- Seema Bhargava
- Department of Biochemistry, Sir Ganga Ram Hospital, New Delhi, India,
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Farkas SA, Milutin-Gašperov N, Grce M, Nilsson TK. Genome-wide DNA methylation assay reveals novel candidate biomarker genes in cervical cancer. Epigenetics 2013; 8:1213-25. [PMID: 24030264 DOI: 10.4161/epi.26346] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The oncogenic human papilloma viruses (HPVs) are associated with precancerous cervical lesions and development of cervical cancer. The DNA methylation signatures of the host genome in normal, precancerous and cervical cancer tissue may indicate tissue-specific perturbation in carcinogenesis. The aim of this study was to identify new candidate genes that are differentially methylated in squamous cell carcinoma compared with DNA samples from cervical intraepithelial neoplasia grade 3 (CIN3) and normal cervical scrapes. The Illumina Infinium HumanMethylation450 BeadChip method identifies genome-wide DNA methylation changes in CpG islands, CpG shores and shelves. Our findings showed an extensive differential methylation signature in cervical cancer compared with the CIN3 or normal cervical tissues. The identified candidate biomarker genes for cervical cancer represent several types of mechanisms in the cellular machinery that are epigenetically deregulated by hypermethylation, such as membrane receptors, intracellular signaling and gene transcription. The results also confirm extensive hypomethylation of genes in the immune system in cancer tissues. These insights into the functional role of DNA methylome alterations in cervical cancer could be clinically applicable in diagnostics and prognostics, and may guide the development of new epigenetic therapies.
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Affiliation(s)
- Sanja A Farkas
- Department of Laboratory Medicine; Örebro University Hospital; Örebro, Sweden
| | | | - Magdalena Grce
- Department of Molecular Medicine; Rudjer Boskovic Institute; Zagreb, Croatia
| | - Torbjörn K Nilsson
- Department of Laboratory Medicine; Örebro University Hospital; Örebro, Sweden; School of Health and Medical Sciences; Örebro University; Örebro, Sweden
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