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Guimarães JR, de Souza BF, Filho JMCV, Damascena LCL, Valença AMG, Persuhn DC, de Oliveira NFP. Epigenetic mechanisms and oral mucositis in children with acute lymphoblastic leukaemia. Eur J Oral Sci 2024; 132:e13009. [PMID: 39075736 DOI: 10.1111/eos.13009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Accepted: 07/12/2024] [Indexed: 07/31/2024]
Abstract
This study aimed to investigate the relationship between epigenetic mechanisms and oral mucositis (OM) in paediatric patients with acute lymphoblastic leukaemia. Oral cells were collected from 76 participants, including 15 healthy individuals, 10 patients with acute lymphoblastic leukaemia but without a history of OM and 51 acute lymphoblastic leukaemia patients with a history of OM (35 with active OM and 16 who had recovered from OM). Global DNA methylation in the miR-9-1 and miR-9-3 genes was performed. Seven polymorphisms rs1801131, rs1801133 (MTHFR), rs2228611 (DNMT1), rs7590760, rs1550117 (DNMT3A), rs6087990, rs2424913 (DNMT3B) were genotyped and an analysis of association with global DNA methylation was performed. The global methylation levels were lower in cancer patients recovered from OM than in the other groups. A higher frequency of unmethylated profile for miR-9-1 and partially methylated profile for miR-9-3 was observed in cancer patients regardless of OM history compared to healthy patients. The GG genotype of the rs2228611 (DNMT1) polymorphism was associated with higher levels of global methylation in cancer patients irrespective of OM. It was concluded that global methylation is associated with mucosal recovery. The effect of DNMT1 genotype on the global DNA methylation profile, as well as the methylation profile of miR-9-1 and miR-9-3 in cancer patients is independent of OM.
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Affiliation(s)
- Juliana Ramalho Guimarães
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, - UFPB, João Pessoa, Paraíba, Brazil
| | - Beatriz Fernandes de Souza
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, - UFPB, João Pessoa, Paraíba, Brazil
| | | | - Lecidamia Cristina Leite Damascena
- Postgraduate Program in Decision Models and Health, Center for Exact and Natural Sciences, Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Ana Maria Gondim Valença
- Postgraduate Program in Decision Models and Health, Center for Exact and Natural Sciences, Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Darlene Camati Persuhn
- Department of Molecular Biology, Center for Exact and Natural Sciences, Federal University of Paraíba, - UFPB, João Pessoa, Paraíba, Brazil
| | - Naila Francis Paulo de Oliveira
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, - UFPB, João Pessoa, Paraíba, Brazil
- Department of Molecular Biology, Center for Exact and Natural Sciences, Federal University of Paraíba, - UFPB, João Pessoa, Paraíba, Brazil
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Chaudhary V, Bhattacharjee D, Devi NK, Saraswathy KN. Global DNA Methylation Levels Viz-a-Viz Genetic and Biochemical Variations in One Carbon Metabolic Pathway: An Exploratory Study from North India. Biochem Genet 2024:10.1007/s10528-023-10659-4. [PMID: 38356009 DOI: 10.1007/s10528-023-10659-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 12/29/2023] [Indexed: 02/16/2024]
Abstract
Despite the importance of one carbon metabolic pathway (OCMP) in modulating the DNA methylation process, only a few population-based studies have explored their relationship among healthy individuals. This study aimed to understand the variations in global DNA methylation levels with respect to selected genetic (CBS 844ins68, MTRR A66G, MTR A2756G, and MTHFR C677T polymorphisms) and biochemical (folate, vitamin B12, and homocysteine) markers associated with OCMP among healthy North Indian adults. The study has been conducted among 1095 individuals of either sex (69.5% females), aged 30-75 years. A sample of 5 mL of blood was collected from each participant. Homocysteine, folate, and vitamin B12 levels were determined using the chemiluminescence technique. Restriction digestion was performed for genotyping MTRR A66G, MTR A2756G, and MTHFR C677T polymorphisms and allele-specific PCR amplification for CBS 844ins68 polymorphism. Global DNA methylation levels were analyzed using ELISA-based colorimetric technique. Of the selected genetic and biochemical markers, the mutant MTRR A66G allele was positively associated with global DNA methylation levels. Further, advanced age was inversely associated with methylation levels. MTRR 66GG genotype group was hypermethylated than other genotypes in folate replete and vitamin B12 deficient group (a condition prevalent among vegetarians), suggesting that the G allele may be more efficient than the wild-type allele in such conditions. Global DNA methylation levels appeared to be more influenced by genetic than biochemical factors. MTRR 66G allele may have a selective advantage in vitamin B12 deficient conditions. Further research should be undertaken to understand how genetics affects epigenetic processes.
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Affiliation(s)
- Vineet Chaudhary
- Department of Anthropology, University of Delhi, Delhi, 110007, India
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Diakite B, Kassogue Y, Maiga M, Dolo G, Kassogue O, Holl JL, Joyce B, Wang J, Cisse K, Diarra F, Keita ML, Traore CB, Kamate B, Sissoko SB, Coulibaly B, Sissoko AS, Traore D, Sidibe FM, Bah S, Teguete I, Ly M, Nadifi S, Dehbi H, Kim K, Murphy R, Hou L. Lack of Association of C677T Methylenetetrahydrofolate Reductase Polymorphism with Breast Cancer Risk in Mali. Genet Res (Camb) 2023; 2023:4683831. [PMID: 36721432 PMCID: PMC9873441 DOI: 10.1155/2023/4683831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 12/22/2022] [Accepted: 01/06/2023] [Indexed: 01/19/2023] Open
Abstract
Methylenetetrahydrofolate reductase (MTHFR) plays a major role in the metabolism of folates and homocysteine, which in turn can affect gene expression and ultimately promote the development of breast cancer. Thus, mutations in the MTHFR gene could influence homocysteine, methionine, and S-adenosylmethionine levels and, indirectly, nucleotide levels. Imbalance in methionine and S-adenosylmethionine synthesis affects protein synthesis and methylation. These changes, which affect gene expression, may ultimately promote the development of breast cancer. We therefore hypothesized that such mutations could also play an important role in the occurrence and pathogenesis of breast cancer in a Malian population. In this study, we used the PCR-RFLP technique to identify the different genotypic profiles of the C677T MTHFR polymorphism in 127 breast cancer women and 160 healthy controls. The genotypic distribution of the C677T polymorphism in breast cancer cases was 88.2% for CC, 11.0% for CT, and 0.8% for TT. Healthy controls showed a similar distribution with 90.6% for CC, 8.8% for CT, and 0.6% for TT. We found no statistical association between the C677T polymorphism and breast cancer risk for the codominant models CT and TT (p > 0.05). The same trend was observed when the analysis was extended to other genetic models, including dominant (p = 0.50), recessive (p = 0.87), and additive (p = 0.50) models. The C677T polymorphism of MTHFR gene did not influence the risk of breast cancer in the Malian samples.
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Affiliation(s)
- Brehima Diakite
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Yaya Kassogue
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mamoudou Maiga
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
- Institute for Global Health, Northwestern University, Chicago, IL 60611, USA
- Preventive Medicine Department, Northwestern University, Chicago, IL 60611, USA
| | - Guimogo Dolo
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Oumar Kassogue
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Jane L Holl
- Department of Neurology, University of Chicago, Chicago, IL 60637, USA
| | - Brian Joyce
- Institute for Global Health, Northwestern University, Chicago, IL 60611, USA
- Preventive Medicine Department, Northwestern University, Chicago, IL 60611, USA
| | - Jun Wang
- Preventive Medicine Department, Northwestern University, Chicago, IL 60611, USA
- Department of Neurology, University of Chicago, Chicago, IL 60637, USA
| | - Kadidiatou Cisse
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Fousseyni Diarra
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mamadou L Keita
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Cheick B Traore
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bakarou Kamate
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Sidi B Sissoko
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bourama Coulibaly
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Adama S Sissoko
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Drissa Traore
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Fatoumata M Sidibe
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Sekou Bah
- Faculty of Pharmacy, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Ibrahim Teguete
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Madani Ly
- Faculty of Medicine and Odontostomatology, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | | | - Hind Dehbi
- Hassan II University Aïn Chock, Casablanca, Morocco
| | - Kyeezu Kim
- Institute for Global Health, Northwestern University, Chicago, IL 60611, USA
- Preventive Medicine Department, Northwestern University, Chicago, IL 60611, USA
| | - Robert Murphy
- Institute for Global Health, Northwestern University, Chicago, IL 60611, USA
| | - Lifang Hou
- Institute for Global Health, Northwestern University, Chicago, IL 60611, USA
- Preventive Medicine Department, Northwestern University, Chicago, IL 60611, USA
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Fatima T, Afzal U, Shaharyar S, Khan S, Ashraf M, Rafaqat W, Kayani MR, Rehman R. MTHFR-c 677C>T polymorphism and male infertility: An analysis in a cohort of Pakistani men. Rev Int Androl 2022; 20:274-280. [DOI: 10.1016/j.androl.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 07/27/2020] [Accepted: 05/24/2021] [Indexed: 11/30/2022]
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Koklesova L, Mazurakova A, Samec M, Biringer K, Samuel SM, Büsselberg D, Kubatka P, Golubnitschaja O. Homocysteine metabolism as the target for predictive medical approach, disease prevention, prognosis, and treatments tailored to the person. EPMA J 2021; 12:477-505. [PMID: 34786033 PMCID: PMC8581606 DOI: 10.1007/s13167-021-00263-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 02/07/2023]
Abstract
Homocysteine (Hcy) metabolism is crucial for regulating methionine availability, protein homeostasis, and DNA-methylation presenting, therefore, key pathways in post-genomic and epigenetic regulation mechanisms. Consequently, impaired Hcy metabolism leading to elevated concentrations of Hcy in the blood plasma (hyperhomocysteinemia) is linked to the overproduction of free radicals, induced oxidative stress, mitochondrial impairments, systemic inflammation and increased risks of eye disorders, coronary artery diseases, atherosclerosis, myocardial infarction, ischemic stroke, thrombotic events, cancer development and progression, osteoporosis, neurodegenerative disorders, pregnancy complications, delayed healing processes, and poor COVID-19 outcomes, among others. This review focuses on the homocysteine metabolism impairments relevant for various pathological conditions. Innovative strategies in the framework of 3P medicine consider Hcy metabolic pathways as the specific target for in vitro diagnostics, predictive medical approaches, cost-effective preventive measures, and optimized treatments tailored to the individualized patient profiles in primary, secondary, and tertiary care.
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Affiliation(s)
- Lenka Koklesova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia
| | - Alena Mazurakova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia
| | - Marek Samec
- Jessenius Faculty of Medicine in Martin, Biomedical Centre Martin, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia
| | - Kamil Biringer
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia
| | - Samson Mathews Samuel
- Department of Physiology and Biophysics, Weill Cornell Medicine in Qatar, Education City, Qatar Foundation, 24144 Doha, Qatar
| | - Dietrich Büsselberg
- Department of Physiology and Biophysics, Weill Cornell Medicine in Qatar, Education City, Qatar Foundation, 24144 Doha, Qatar
| | - Peter Kubatka
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia
| | - Olga Golubnitschaja
- Predictive, Preventive, Personalised (3P) Medicine, Department of Radiation Oncology, University Hospital Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, 53127 Bonn, Germany
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Li H, Fernández-Guasti A, Xu Y, Swaab D. Retracted: Sexual orientation, neuropsychiatric disorders and the neurotransmitters involved. Neurosci Biobehav Rev 2021; 131:479-488. [PMID: 34597715 DOI: 10.1016/j.neubiorev.2021.09.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 08/17/2021] [Accepted: 09/26/2021] [Indexed: 11/26/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor in Chief of Neuroscience and Biobehavioral Reviews after concerns were raised with respect to the phrasing of comparisons drawn between humans and animal models. These comparisons were deemed unsupportable, and thus in the best interests of publication standards the Editor has concluded it is necessary to retract the paper. The authors disagree with the reason for the retraction.
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Affiliation(s)
- Haimei Li
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, PR China; Department of Neuropsychiatric Disorders, Netherlands Institute for Neuroscience, Amsterdam, 1105 BA, the Netherlands
| | | | - Yi Xu
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, PR China; The Key Laboratory of Mental Disorder Management in Zhejiang Province, Hangzhou, 310003, PR China; Zhejiang Engineering Center for Mathematical Mental Health, Hangzhou, 310003, PR China; Brain Research Institute of Zhejiang University, Hangzhou, 31003, PR China.
| | - Dick Swaab
- Department of Neuropsychiatric Disorders, Netherlands Institute for Neuroscience, Amsterdam, 1105 BA, the Netherlands.
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Peleg LC, Rabinovitch D, Lavie Y, Rabbie DM, Horowitz I, Fruchter E, Gruenwald I. Post-SSRI Sexual Dysfunction (PSSD): Biological Plausibility, Symptoms, Diagnosis, and Presumed Risk Factors. Sex Med Rev 2021; 10:91-98. [PMID: 34627736 DOI: 10.1016/j.sxmr.2021.07.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 06/24/2021] [Accepted: 07/06/2021] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Post-SSRI sexual-dysfunction (PSSD) is an iatrogenicsyndrome, the underlying neurobiological mechanisms of which areunclear. Symptom onset follows cessation of serotonergicantidepressants i.e. Selective Serotonin and Norepinephrine ReuptakeInhibitors (SSRI's, SNRI's), and Tricyclic antidepressants (TCA's). PSSDsymptoms include genital anesthesia, erectile dysfunction andorgasmic/ejaculatory anhedonia, and should be differentiated fromdepression-related sexual-dysfunction. Recently, accumulated data of numerous case-reports suggest additional non-sexual symptoms including, anhedonia, apathy, and blunted affect. PSSD gained official recognition after the European medical agency concluded that PSSD is a medical condition that persists after discontinuation of SSRI's and SNRI's. OBJECTIVE To review possible underlying neurobiological mechanisms ofthis syndrome, update information on the pathophysiology, present a listof potential risk-factors and discuss potential management options forPSSD. METHODS Extensive literature review on the main symptom-patterns ofthis disorder was undertaken using PubMed. It includes introductoryexplications of relevant neurobiology with the objective of generatinghypothesis. RESULTS Precipitating factors for PSSD include previous exposure to certain drugs, genetic predisposition, psychological stress or chemical stressful reaction to antidepressants along pre-existing medical conditions affecting neuroplasticity. Different theories have been proposed to explain the pathophysiology of PSSD: epigenetic gene expression, dopamine-serotonin interactions, serotonin neurotoxicity and hormonal changes. The diagnosis of PSSD is by excluding all other etiologies of sexual-dysfunction. Treatment is challenging, and many strategies have been suggested without definitive outcomes. We offerthe contours of a future neurobiological research agenda, and propose several underlying mechanisms for the various symptoms of PSSD which could be the foundation for a future treatment algorithm. CONCLUSION There is a need for well-designed neurobiological research in this domain, as well as in the prevalence, pathophysiology, and treatment of PSSD. Practitioners should be alert to the distinctive features of PSSD. Misdiagnosing this syndrome might lead to harmful Sexual Medicine Reviews. Peleg LC, Rabinovitch D, Lavie Y, et al. Post-SSRI Sexual Dysfunction (PSSD): Biological Plausibility, Symptoms, Diagnosis, and Presumed Risk Factors. Sex Med Rev 2021;XX:XXX-XXX.
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Affiliation(s)
| | | | | | - Deya M Rabbie
- Ahram Canadian University, Neuropharmacology, 6th of October City, Egypt
| | - Itai Horowitz
- Rambam Healthcare Campus, Psychiatry Department, Haifa, Israel
| | | | - Ilan Gruenwald
- Rambam Healthcare Campus, Neuro-Urology Unit, Haifa, Israel.
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Estévez-López F, Salazar-Tortosa DF, Camiletti-Moirón D, Gavilán-Carrera B, Aparicio VA, Acosta-Manzano P, Segura-Jiménez V, Álvarez-Gallardo IC, Carbonell-Baeza A, Munguía-Izquierdo D, Geenen R, Lacerda E, Delgado-Fernández M, Martínez-González LJ, Ruiz JR, Álvarez-Cubero MJ. Fatigue in Women with Fibromyalgia: A Gene-Physical Activity Interaction Study. J Clin Med 2021; 10:jcm10091902. [PMID: 33924903 PMCID: PMC8125111 DOI: 10.3390/jcm10091902] [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] [Received: 02/25/2021] [Revised: 03/27/2021] [Accepted: 04/06/2021] [Indexed: 11/16/2022] Open
Abstract
Fatigue is a cardinal symptom in fibromyalgia. Fatigue is assumed to be the result of genetic susceptibility and environmental factors. We aimed at examining the role of genetic susceptibility for fatigue in southern Spanish women with fibromyalgia, by looking at single nucleotide polymorphisms in 34 fibromyalgia candidate-genes, at the interactions between genes, and at the gene-physical activity interactions. We extracted DNA from saliva of 276 fibromyalgia women to analyze gene-polymorphisms. Accelerometers registered physical activity and sedentary behavior. Fatigue was assessed with the Multidimensional Fatigue Inventory. Based on the Bonferroni’s and False Discovery Rate values, we found that the genotype of the rs4453709 polymorphism (sodium channel protein type 9 subunit alpha, SCN9A, gene) was related to reduced motivation (AT carriers showed the highest reduced motivation) and reduced activity (AA carriers showed the lowest reduced activity). Carriers of the heterozygous genotype of the rs1801133 (methylene tetrahydrofolate reductase, MTHFR, gene) or rs4597545 (SCN9A gene) polymorphisms who were physically active reported lower scores on fatigue compared to their inactive counterparts. Highly sedentary carriers of the homozygous genotype of the rs7607967 polymorphism (AA/GG genotype; SCN9A gene) presented more reduced activity (a dimension of fatigue) than those with lower levels of sedentary behavior. Collectively, findings from the present study suggest that the contribution of genetics and gene-physical activity interaction to fatigue in fibromyalgia is modest.
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Affiliation(s)
- Fernando Estévez-López
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Diego F. Salazar-Tortosa
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85719, USA
- Correspondence:
| | - Daniel Camiletti-Moirón
- Department of Physical Education, Faculty of Education Sciences, University of Cádiz, 11519 Cádiz, Spain; (D.C.-M.); (B.G.-C.); (V.S.-J.); (I.C.Á.-G.); (A.C.-B.)
| | - Blanca Gavilán-Carrera
- Department of Physical Education, Faculty of Education Sciences, University of Cádiz, 11519 Cádiz, Spain; (D.C.-M.); (B.G.-C.); (V.S.-J.); (I.C.Á.-G.); (A.C.-B.)
| | - Virginia A. Aparicio
- Department of Physiology, Faculty of Pharmacy, University of Granada, 18011 Granada, Spain;
- Biomedical Research Centre (CIBM), Institute of Nutrition and Food Technology (INYTA), University of Granada, 18016 Granada, Spain
| | - Pedro Acosta-Manzano
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18010 Granada, Spain; (P.A.-M.); (M.D.-F.)
| | - Víctor Segura-Jiménez
- Department of Physical Education, Faculty of Education Sciences, University of Cádiz, 11519 Cádiz, Spain; (D.C.-M.); (B.G.-C.); (V.S.-J.); (I.C.Á.-G.); (A.C.-B.)
| | - Inmaculada C. Álvarez-Gallardo
- Department of Physical Education, Faculty of Education Sciences, University of Cádiz, 11519 Cádiz, Spain; (D.C.-M.); (B.G.-C.); (V.S.-J.); (I.C.Á.-G.); (A.C.-B.)
| | - Ana Carbonell-Baeza
- Department of Physical Education, Faculty of Education Sciences, University of Cádiz, 11519 Cádiz, Spain; (D.C.-M.); (B.G.-C.); (V.S.-J.); (I.C.Á.-G.); (A.C.-B.)
| | - Diego Munguía-Izquierdo
- Physical Performance and Sports Research Center, Department of Sports and Computer Science, Section of Physical Education and Sports, Faculty of Sport Sciences, Universidad Pablo de Olavide, 41013 Seville, Spain;
| | - Rinie Geenen
- Department of Psychology, Faculty of Social and Behavioural Sciences, Utrecht University, 3508 TC Utrecht, The Netherlands;
| | - Eliana Lacerda
- Department of Clinical Research, Faculty of Infectious & Tropical Disease, London School of Hygiene & Tropical Medicine, London WC1E 7HT, UK;
| | - Manuel Delgado-Fernández
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18010 Granada, Spain; (P.A.-M.); (M.D.-F.)
| | - Luis J. Martínez-González
- GENYO, Centre for Genomics and Oncological Research, Pfizer, University of Granada, Andalusian Regional Government, PTS Granada, Av. Ilustracion, 114, 18016 Granada, Spain;
| | - Jonatan R. Ruiz
- PROFITH—“PROmoting FITness and Health Through Physical Activity” Research Group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain;
| | - María J. Álvarez-Cubero
- Department of Biochemistry and Molecular Biology III, Faculty of Medicine, University of Granada, 18010 Granada, Spain;
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Yadav S, Longkumer I, Joshi S, Saraswathy KN. Methylenetetrahydrofolate reductase gene polymorphism, global DNA methylation and blood pressure: a population based study from North India. BMC Med Genomics 2021; 14:59. [PMID: 33639933 PMCID: PMC7912464 DOI: 10.1186/s12920-021-00895-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hypertension is a complex disorder affected by gene-environment interactions. Methylenetetrahydrofolate reductase (MTHFR) gene is one of the genes in One Carbon Metabolic (OCM) pathway that affects both blood pressure and epigenetic phenomenon. MTHFR C677T gene polymorphism leads to reduced methylation capacity via increased homocysteine concentrations. Global DNA methylation (5mC%) also gets affected in conditions such as hypertension. However, no study is found to understand hypertension in terms of both genetics and epigenetics. The present study aims to understand the relation between methylation, MTHFR C677T gene polymorphism and hypertension. It also tries to understand relation (if any) between methylation and anti-hypertensive drugs. METHODS This is a cross-sectional study where data were collected from a total of 1634 individuals of either sex in age group 35-65 years. Hypertensives (SBP ≥ 140 mm Hg and DBP ≥ 90 mm Hg) (on treatment/not on treatment) and absolute controls were 236 (cases) and 307 (controls), respectively. All the samples were subjected to MTHFR C677T gene polymorphism screening (PCR-RFLP) and global DNA methylation assay (ELISA based colorimetric assay). Results of both the analyses were obtained on 218 cases, 263 controls. RESULTS Median 5mC% was relatively lower among cases (p > 0.05) compared to controls, despite controlling for confounders (age, sex, smoking, alcohol, diet) (r2-0.92, p-0.08). Cases not on medication had significantly reduced 5mC% compared to controls (p < 0.05), despite adjusting for confounders (r2-0.857, p-0.01). Among cases (irrespective of treatment), there was a significant variation in 5mC% across the three genotypes i.e. CC, CT and TT, with no such variation among controls. Cases (not on medication) with TT genotype had significantly lower methylation levels compared to the TT genotype controls and cases (on medication) (p < 0.01). CONCLUSION Global DNA hypomethylation seems to be associated with hypertension and antihypertensive drugs seem to improve methylation. Hypertensive individuals with TT genotype but not on medication are more likely to be prone to global DNA hypomethylation. Important precursors in OCM pathway include micronutrients such as vitamin B-12, B-9 and B-6; their nutritional interventions (either dietary or supplement) may serve as strategies to prevent hypertension at population level. However, more epidemiological-longitudinal studies are needed for further validation.
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Affiliation(s)
- Suniti Yadav
- Indian Council of Medical Research, New Delhi, 110029 India
| | | | - Shipra Joshi
- Manbhum Ananda Ashram Nityananda Trust-MANT, Kolkata, West Bengal 700078 India
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Zhang J, Ma X, Su Y, Wang L, Shang S, Yue W. Association Study of MTHFR C677T Polymorphism and Birth Body Mass With Risk of Autism in Chinese Han Population. Front Psychiatry 2021; 12:560948. [PMID: 33716803 PMCID: PMC7947295 DOI: 10.3389/fpsyt.2021.560948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 01/22/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: To explore the association of the methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism with birth body mass and risk of autism in Chinese Han population. Methods: A total 1,505 Chinese Han autism patients were recruited, using the Diagnostic and Statistical Manual of Mental Disorders, 4th revised version (DSM-IV-R) diagnostic criteria for autism, and 1,308 sex-matched healthy controls were also enrolled for the study. All the participants' birth body masses were counted according to the medical records. The MTHFR C677T genotypes were detected using the polymerase chain reaction-restrict fragment length polymorphism (PCR-RFLP) method. The association between C677T polymorphism, birth body mass, and risk of autism were analyzed using the chi-square tests. Results: The present study found that the MTHFR 677T was significantly associated with risk of autism [P = 0.004, odds ratio (OR) = 1.18, 95% CI = 1.02-1.29). The autism children more frequently showed low birth body mass (<2.5 kg) than healthy control subjects (8.6 vs. 5.3%, P = 0.001, OR = 1.67, 95% CI = 1.24-2.26). The interactive effects between MTHFR 677T and low birth body mass (P = 0.0001, OR = 2.18, 95% CI = 1.44-3.32) were also significantly associated with risk of autism. Conclusions: The MTHFR C677T polymorphism and low birth body mass may be associated with risk of autism in Chinese Han population.
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Affiliation(s)
- Jishui Zhang
- Department of Mental Health, Beijing Children's Hospital, Capital Medical University, Beijing, China.,National Center for Children's Health, Beijing, China
| | - Xueqian Ma
- School of Nursing & Sixth Hospital, Peking University, Beijing, China.,Peking University Sixth Hospital, Institute of Mental Health, Beijing, China.,National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.,National Health Commission (NHC) Key Laboratory of Mental Health, Research Unit of Diagnosis and Treatment of Mood Cognitive Disorder (2018RU006), Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Su
- Peking University Sixth Hospital, Institute of Mental Health, Beijing, China.,National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.,National Health Commission (NHC) Key Laboratory of Mental Health, Research Unit of Diagnosis and Treatment of Mood Cognitive Disorder (2018RU006), Chinese Academy of Medical Sciences, Beijing, China
| | - Lifang Wang
- Peking University Sixth Hospital, Institute of Mental Health, Beijing, China.,National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.,National Health Commission (NHC) Key Laboratory of Mental Health, Research Unit of Diagnosis and Treatment of Mood Cognitive Disorder (2018RU006), Chinese Academy of Medical Sciences, Beijing, China
| | - Shaomei Shang
- School of Nursing, Peking University, Beijing, China
| | - Weihua Yue
- School of Nursing & Sixth Hospital, Peking University, Beijing, China.,Peking University Sixth Hospital, Institute of Mental Health, Beijing, China.,National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.,National Health Commission (NHC) Key Laboratory of Mental Health, Research Unit of Diagnosis and Treatment of Mood Cognitive Disorder (2018RU006), Chinese Academy of Medical Sciences, Beijing, China.,PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China
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11
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Wan L, Li Y, Zhang Z, Sun Z, He Y, Li R. Methylenetetrahydrofolate reductase and psychiatric diseases. Transl Psychiatry 2018; 8:242. [PMID: 30397195 PMCID: PMC6218441 DOI: 10.1038/s41398-018-0276-6] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 08/07/2018] [Accepted: 09/10/2018] [Indexed: 11/26/2022] Open
Abstract
Methylenetetrahydrofolate reductase (MTHFR) is a key enzyme for the critical process of one-carbon metabolism involving folate and homocysteine metabolisms. It is known that some polymorphism of MTHFR would result in reduction of MTHFR enzyme activity as well as DNA methylation process, later shown to have significant impacts in various psychiatric diseases. However, it is unclear whether the polymorphism of MTHFR could be an independent or an add-on risk factor for specific psychiatric symptoms, such as anxiety, depression, positive, or negative symptoms of schizophrenia, or acts as risk factor for specific psychiatric disorders, such as schizophrenia, major depression, autisms, and bipolar disorders. It is also understudied on whether folate supplements could be an effective treatment for psychiatric patients with defect MTHFR activity. In this review, we not only gathered the most recent discoveries on MTHFR polymorphism and related DNA methylation in various psychiatric disorders, but also highlighted the potential relationships between MTHFR activity and implication of folate-related function in specific mental diseases.
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Affiliation(s)
- Lin Wan
- Center for Brain Disorders Research, Capital Medical University & Beijing Institute of Brain Disorders, Beijing, 100069, China
| | - Yuhong Li
- Center for Brain Disorders Research, Capital Medical University & Beijing Institute of Brain Disorders, Beijing, 100069, China
| | - Zhengrong Zhang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, China
| | - Zuoli Sun
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, China
| | - Yi He
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, China
| | - Rena Li
- Center for Brain Disorders Research, Capital Medical University & Beijing Institute of Brain Disorders, Beijing, 100069, China.
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, China.
- Center for Hormone Advanced Science and Education, Roskamp Institute, Sarasota, FL, 34243, USA.
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12
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Lei W, Xia Y, Wu Y, Fu G, Ren A. Associations Between MTR A2756G, MTRR A66G, and TCN2 C776G Polymorphisms and Risk of Nonsyndromic Cleft Lip With or Without Cleft Palate: A Meta-Analysis. Genet Test Mol Biomarkers 2018; 22:465-473. [PMID: 30004262 DOI: 10.1089/gtmb.2018.0037] [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] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE We conducted a meta-analysis to investigate the associations of methionine synthase (MTR) A2756G, methionine synthase reductase (MTRR) A66G, and transcobalamin 2 (TCN2) C776G gene polymorphisms with nonsyndromic cleft lip with or without cleft palate (NSCL/P). MATERIALS AND METHODS The PubMed, Web of Science, Embase, and Wiley Online Library databases and the China Biomedical Literature Service System (SinoMed) were searched for relevant articles to explore the associations between the MTR A2756G, MTRR A66G, and TCN2 C776G polymorphisms and the risk of NSCL/P. We performed overall comparisons and stratified analyses according to the ethnicity, type of NSCL/P, and Hardy-Weinberg equilibrium (HWE) of the control group. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were applied to estimate the associations of these gene polymorphisms with NSCL/P risk using fixed-effects or random-effects models incorporating five genetic models. RESULTS Ultimately, 12 articles were included in this study. The pooled results did not reveal a significant association of the MTR A2756G polymorphism with NSCL/P risk (G vs. A: OR = 0.95, 95% CI = 0.82-1.11, p = 0.55). Similar results were observed for the MTRR A66G polymorphism (G vs. A: OR = 0.99, 95% CI = 0.82-1.18, p = 0.72) and the TCN2 C776G polymorphism (G vs. C: OR = 0.95, 95% CI = 0.86-1.06, p = 0.37). CONCLUSION In summary, the MTR A2756G, MTRR A66G, and TCN2 C776G polymorphisms might not be associated with NSCL/P risk.
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Affiliation(s)
- Wei Lei
- 1 Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing, China .,2 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing, China .,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing , China
| | - Yinlan Xia
- 1 Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing, China .,2 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing, China .,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing , China
| | - Yang Wu
- 1 Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing, China .,2 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing, China .,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing , China
| | - Gang Fu
- 1 Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing, China .,2 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing, China .,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing , China
| | - Aishu Ren
- 1 Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing, China .,2 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing, China .,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing , China
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13
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Ribeiro MR, Lima RPA, Lisboa JVDC, Chaves TR, Luna RCP, do Nascimento RAF, de Oliveira Y, Persuhn DC, Sérgio da Silva A, Gonçalves MDCR, Ferreira FELDL, Lima RT, da Silva Diniz A, de Almeida ATC, de Moraes RM, Verly Junior E, Costa MJDC. Influence of the C677T Polymorphism of the MTHFR Gene on Oxidative Stress in Women With Overweight or Obesity: Response to a Dietary Folate Intervention. J Am Coll Nutr 2018; 37:677-684. [PMID: 29702041 DOI: 10.1080/07315724.2018.1460224] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The C677T polymorphism of the methylenetetrahydrofolate reductase gene (MTHFR) is related to folate metabolism and can alter the levels of biochemical markers.Objective: Investigate the influence of the MTHFR C677T polymorphism on the effects of a dietary folate intervention on oxidative stress in women with overweight or obesity.Methods: Forty-eight adult women with overweight or obesity were subjected to a 24-hour dietary recall, anthropometric measurements, biochemical analysis, and genotyping of the MTHFR C677T polymorphism. They were allocated by convenience sampling to 2 groups, which received 300 g of folate-rich vegetables containing 191 µg/d (Group 1) (n = 24) or 95 µg/d (Group 2) (n = 24) of folate for 8 weeks.Results: The dietary intervention increased the serum folic acid levels in the 2 analyzed groups. The intervention with 191 µg/d of folate led to relevant results in terms of homocysteine levels (p = 0.0005) and total antioxidant capacity (p = 0.0261); the effect was larger among carriers of the TT genotype.Conclusions: The study demonstrated the beneficial effect of folate intake in terms of a TAC elevation for the CC and TT genotypes of the MTHFR C677T polymorphism, an increase in folic acid levels for all genotypes, and a reduction in the Hcy levels for the TT genotype in response to an intervention consisting of an intake of 191 µg/d of folate supplied by vegetables.
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Affiliation(s)
- Marina Ramalho Ribeiro
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Raquel Patrícia Ataíde Lima
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Jéssica Vanessa de Carvalho Lisboa
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Thamires Ribeiro Chaves
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Rafaella Cristhine Pordeus Luna
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Rayner Anderson Ferreira do Nascimento
- Graduate Program in Molecular and Human Biology, Center of Exact and Natural Sciences (Centro de Ciências Exatas e da Natureza-CCEN), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Yohanna de Oliveira
- Graduate Program in Nutrition Sciences, (Centro de Ciências da Saúde-CCS), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Darlene Camati Persuhn
- Department of Nutrition, Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Alexandre Sérgio da Silva
- Department of Nutrition, Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | | | | | - Roberto Teixeira Lima
- Department of Nutrition, Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Alcides da Silva Diniz
- Department of Nutrition, Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Alessio Tony Cavalcanti de Almeida
- Department of Economics, Center of Applied Social Sciences (Centro de Ciências Sociais Aplicadas-CCSA), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Ronei Marcos de Moraes
- Graduate Program in Health Decision Models, Center of Exact and Natural Sciences (Centro de Ciências Exatas e da Natureza-CCEN), Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
| | - Eliseu Verly Junior
- Department of Epidemiology, Institute of Social Medicine, State University of Rio de Janeiro (Universidade Estadual do Rio de Janeiro-UERJ), Rio de Janeiro, Brazil
| | - Maria José de Carvalho Costa
- Department of Nutrition, Federal University of Paraiba (Universidade Federal da Paraíba-UFPB), João Pessoa, Brazil
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14
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Silva MBD, Melo ARDS, Costa LDA, Barroso H, Oliveira NFPD. Global and gene-specific DNA methylation and hydroxymethylation in human skin exposed and not exposed to sun radiation. An Bras Dermatol 2018; 92:793-800. [PMID: 29364434 PMCID: PMC5786392 DOI: 10.1590/abd1806-4841.20175875] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 08/07/2016] [Indexed: 12/19/2022] Open
Abstract
Background epigenomes can be influenced by environmental factors leading to the
development of diseases. Objective To investigate the influence of sun exposure on global DNA methylation and
hydroxymethylation status and at specific sites of the miR-9-1, miR-9-3 and
MTHFR genes in skin samples of subjects with no history of skin
diseases. Methods Skin samples were obtained by punch on sun-exposed and sun-protected arm
areas from 24 corpses of 16-89 years of age. Genomic DNA was extracted from
skin samples that were ranked according to Fitzpatrick's criteria as light,
moderate, and dark brown. Global DNA methylation and hydroxymethylation and
DNA methylation analyses at specific sites were performed using ELISA and
MSP, respectively. Results No significant differences in global DNA methylation and hydroxymethylation
levels were found among the skin areas, skin types, or age. However,
gender-related differences were detected, where women showed higher
methylation levels. Global DNA methylation levels were higher than
hydroxymethylation levels, and the levels of these DNA modifications
correlated in skin tissue. For specific sites, no differences among the
areas were detected. Additional analyses showed no differences in the
methylation status when age, gender, and skin type were considered; however,
the methylation status of the miR-9-1 gene seems to be gender related. Study limitations there was no separation of dermis and epidermis and low sample size. Conclusion sun exposure does not induce changes in the DNA methylation and
hydroxymethylation status or in miR-9-1, miR-9-3 and MTHFR genes for the
studied skin types.
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Affiliation(s)
- Mikaelly Batista da Silva
- Center for Exact Sciences and Nature, Post-graduate Program in Cellular and Molecular Biology, Universidade Federal da Paraíba (UFPB) -Paraíba, (PB), Brazil
| | - Alanne Rayssa da Silva Melo
- Center for Exact Sciences and Nature, Post-graduate Program in Cellular and Molecular Biology, Universidade Federal da Paraíba (UFPB) -Paraíba, (PB), Brazil
| | - Ludimila de Araújo Costa
- Center for Exact Sciences and Nature, Post-graduate Program in Cellular and Molecular Biology, Universidade Federal da Paraíba (UFPB) -Paraíba, (PB), Brazil
| | - Haline Barroso
- Center for Exact Sciences and Nature, Post-graduate Program in Cellular and Molecular Biology, Universidade Federal da Paraíba (UFPB) -Paraíba, (PB), Brazil
| | - Naila Francis Paulo de Oliveira
- Center for Exact Sciences and Nature, Post-graduate Program in Cellular and Molecular Biology, Universidade Federal da Paraíba (UFPB) -Paraíba, (PB), Brazil
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15
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Del Gobbo GF, Price EM, Hanna CW, Robinson WP. No evidence for association of MTHFR 677C>T and 1298A>C variants with placental DNA methylation. Clin Epigenetics 2018; 10:34. [PMID: 29564022 PMCID: PMC5851070 DOI: 10.1186/s13148-018-0468-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 03/01/2018] [Indexed: 01/30/2023] Open
Abstract
Background 5,10-Methylenetetrahydrofolate reductase (MTHFR) is a key enzyme in one-carbon metabolism that ensures the availability of methyl groups for methylation reactions. Two single-nucleotide polymorphisms (SNPs) in the MTHFR gene, 677C>T and 1298A>C, result in a thermolabile enzyme with reduced function. These variants, in both the maternal and/or fetal genes, have been associated with pregnancy complications including miscarriage, neural tube defects (NTDs), and preeclampsia (PE), perhaps due to altered capacity for DNA methylation (DNAm). In this study, we assessed the association between MTHFR 677TT and 1298CC genotypes and risk of NTDs, PE, or normotensive intrauterine growth restriction (nIUGR). Additionally, we assessed whether these high-risk genotypes are associated with altered DNAm in the placenta. Results In 303 placentas screened for this study, we observed no significant association between the occurrence of NTDs (N = 55), PE (early-onset: N = 28, late-onset: N = 20), or nIUGR (N = 21) and placental (fetal) MTHFR 677TT or 1298CC genotypes compared to healthy pregnancies (N = 179), though a trend of increased 677TT genotype in PE/IUGR together was observed (OR 2.53, p = 0.048). DNAm was profiled in 10 high-risk 677 (677TT + 1298AA), 10 high-risk 1298 (677CC + 1298CC), and 10 reference (677CC + 1298AA) genotype placentas. Linear modeling identified no significantly differentially methylated sites between high-risk 677 or 1298 and reference placentas at a false discovery rate < 0.05 and Δβ ≥ 0.05 using the Illumina Infinium HumanMethylation450 BeadChip. Using a differentially methylated region analysis or separating cytosine-guanine dinucleotides (CpGs) by CpG density to reduce multiple comparisons also did not identify differential methylation. Additionally, there was no consistent evidence for altered methylation of repetitive DNA between high-risk and reference placentas. Conclusions We conclude that large-scale, genome-wide disruption in DNAm does not occur in placentas with the high-risk MTHFR 677TT or 1298CC genotypes. Furthermore, there was no evidence for an association of the 1298CC genotype and only a tendency to higher 677TT in pregnancy complications of PE/IUGR. This may be due to small sample sizes or folate repletion in our Canadian population attenuating effects of the high-risk MTHFR variants. However, given our results and the conflicting results in the literature, investigations into alternative mechanisms that may explain the link between MTHFR variants and pregnancy complications, or in populations at risk of folate deficiencies, are warranted. Electronic supplementary material The online version of this article (10.1186/s13148-018-0468-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Giulia F Del Gobbo
- 1BC Children's Hospital Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 Canada.,2Department of Medical Genetics, University of British Columbia, 4500 Oak St, Vancouver, BC V6H 3N1 Canada
| | - E Magda Price
- 1BC Children's Hospital Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 Canada.,2Department of Medical Genetics, University of British Columbia, 4500 Oak St, Vancouver, BC V6H 3N1 Canada
| | - Courtney W Hanna
- 3Epigenetics Programme, Babraham Institute, Cambridge, CB22 3AT UK.,4Centre for Trophoblast Research, University of Cambridge, Cambridge, CB2 3EG UK
| | - Wendy P Robinson
- 1BC Children's Hospital Research Institute, 950 W 28th Ave, Vancouver, BC V5Z 4H4 Canada.,2Department of Medical Genetics, University of British Columbia, 4500 Oak St, Vancouver, BC V6H 3N1 Canada.,5Child and Family Research Institute, Room 2082, 950 W 28th Avenue, Vancouver, BC V5Z 4H4 Canada
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16
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Manche SK, Jangala M, Dudekula D, Koralla M, Akka J. Polymorphisms in folate metabolism genes are associated with susceptibility to presbycusis. Life Sci 2018; 196:77-83. [DOI: 10.1016/j.lfs.2018.01.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/04/2018] [Accepted: 01/15/2018] [Indexed: 12/14/2022]
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17
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Qin JB, Zhao GL, Wang F, Cai YM, Lan LN, Yang L, Feng TJ. Childhood Abuse Experiences and the COMT and MTHFR Genetic Variants Associated With Male Sexual Orientation in the Han Chinese Populations: A Case-Control Study. J Sex Med 2018; 15:29-42. [PMID: 29289372 DOI: 10.1016/j.jsxm.2017.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 10/16/2017] [Accepted: 11/20/2017] [Indexed: 11/20/2022]
Abstract
BACKGROUND Although it is widely acknowledged that genetic and environmental factors are involved in the development of male homosexuality, the causes are not fully understood. AIM To explore the association and interaction of childhood abuse experiences and genetic variants of the catechol-O-methyltransferase (COMT) and methylenetetrahydrofolate reductase (MTHFR) genes with the development of male homosexuality. METHODS A case-control study of 537 exclusively homosexual men and 583 exclusively heterosexual men was conducted, with data collected from March 2013 to August 2015. Data were analyzed using χ2 tests and logistic regression models. OUTCOMES Sociodemographic characteristics, childhood abuse experiences, and polymorphisms of COMT at rs4680, rs4818, and rs6267 and MTHFR at rs1801133. RESULTS More frequent occurrence of physical (adjusted odds ratio [aOR] = 1.78), emotional (aOR = 2.07), and sexual (aOR = 2.53) abuse during childhood was significantly associated with the development of male homosexuality. The polymorphisms of MTHFR at rs1801133 and COMT at rs4818 also were significantly associated with the development of male homosexuality in the homozygote comparisons (T/T vs C/C at rs1801133, aOR = 1.68; G/G vs C/C at rs4818, aOR = 1.75). In addition, significant interaction effects between childhood abuse experiences and the COMT and MTHFR genetic variants on the development of male homosexuality were found. CLINICAL TRANSLATION This is the first time that an association of childhood abuse, COMT and MTHFR genetic variants, and their interactions with development of male homosexuality was exhaustively explored, which could help provide new insight into the etiology of male homosexuality. STRENGTHS AND LIMITATIONS Because homosexual men are a relatively obscure population, it was impossible to select the study participants by random sampling, which could lead to selection bias. In addition, because this was a case-control study, recall bias was inevitable, and we could not verify causality. CONCLUSIONS Childhood abuse and the COMT and MTHFR genetic variants could be positively associated with the development of homosexuality. However, it remains unknown how these factors jointly play a role in the development of homosexuality, and more studies in different ethnic populations and with a larger sample and a prospective design are required to confirm our findings. Qin J-B, Zhao G-L, Wang F, et al. Childhood Abuse Experiences and the COMT and MTHFR Genetic Variants Associated With Male Sexual Orientation in the Han Chinese Populations: A Case-Control Study. J Sex Med 2018;15:29-42.
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Affiliation(s)
- Jia-Bi Qin
- Department of Epidemiology and Health Statistics, School of Public Health, Central South University, Changsha, Hunan, China
| | - Guang-Lu Zhao
- Shenzhen Center for Chronic Disease Control, Shenzhen, China
| | - Feng Wang
- Shenzhen Center for Chronic Disease Control, Shenzhen, China
| | - Yu-Mao Cai
- Shenzhen Center for Chronic Disease Control, Shenzhen, China
| | - Li-Na Lan
- Shenzhen Center for Chronic Disease Control, Shenzhen, China
| | - Lin Yang
- Department of Epidemiology and Health Statistics, School of Public Health, Central South University, Changsha, Hunan, China
| | - Tie-Jian Feng
- Shenzhen Center for Chronic Disease Control, Shenzhen, China.
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18
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Ferlazzo N, Currò M, Zinellu A, Caccamo D, Isola G, Ventura V, Carru C, Matarese G, Ientile R. Influence of MTHFR Genetic Background on p16 and MGMT Methylation in Oral Squamous Cell Cancer. Int J Mol Sci 2017; 18:ijms18040724. [PMID: 28353639 PMCID: PMC5412310 DOI: 10.3390/ijms18040724] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/25/2017] [Accepted: 03/27/2017] [Indexed: 02/07/2023] Open
Abstract
Genetic polymorphisms of the methylenetetrahydrofolate reductase (MTHFR) enzyme may influence DNA methylation. Alterations in DNA methylation patterns of genes involved in the regulation of the cell cycle, DNA repair, cell adherence and metastasis process are known to contribute to cancer development. In this study, the influence of the MTHFR C677T and A1298C gene polymorphisms on global DNA methylation and site-specific methylation on p16 and O⁶-methylguanine-DNA methyltransferase (MGMT) gene promoters was investigated in patients with oral squamous cell cancer (OSCC). To this aim, methylation studies were carried out by using genomic DNA isolated from saliva samples of 58 OSCC patients and 90 healthy controls. The frequency of the CT/AC and TT/AA genotypes was significantly higher in patients than in controls. Whereas no difference in global DNA methylation levels was observed between patients and controls, a higher frequency of methylation at both p16 and MGMT gene promoters was detected in patients compared with controls. A significant association between MTHFR gene polymorphisms and p16 and MGMT gene promoter methylation was found. The frequency of p16 and MGMT methylation was around 60% in patients with either the CT/AC or TT/AA genotype. Our results suggest that hypermethylation of cancer-related genes may be affected by MTHFR polymorphisms.
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Affiliation(s)
- Nadia Ferlazzo
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Monica Currò
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Angelo Zinellu
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy.
| | - Daniela Caccamo
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Gaetano Isola
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Valeria Ventura
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Ciriaco Carru
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy.
- Control Quality Unit, University Hospital of Sassari (AOU), 07100 Sassari, Italy.
| | - Giovanni Matarese
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
| | - Riccardo Ientile
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98124 Messina, Italy.
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Rezende LM, Marson FAL, Lima CSP, Bertuzzo CS. Can MTHFR C677T and A1298C Polymorphisms Alter the Risk and Severity of Sporadic Breast Cancer in Brazilian Women? Clin Breast Cancer 2017; 17:e199-e208. [PMID: 28330681 DOI: 10.1016/j.clbc.2017.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 02/01/2017] [Accepted: 02/08/2017] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Polymorphisms in the methylenetetrahydrofolate reductase gene (MTHFR) modify the risk and severity of sporadic breast cancer (BC). In this context, the MTHFR C677T and A1298C polymorphisms have been associated with risk and severity of sporadic BC. PATIENTS AND METHODS In total, 253 women with BC and 257 controls were enrolled in this study. Polymorphisms were analyzed using restriction fragment length polymorphism - polymerase chain reaction. Epidemiology, tumor characteristics, and reproductive factors were considered in the analysis. Statistical tests included the χ2 test, the Fisher exact test, and the Mann-Whitney and Kruskal-Wallis tests, or parametric equivalents. RESULTS MTHFR polymorphisms were not a risk factor for BC. The 677CC genotype was associated with distant metastasis (odds ratio [OR] = 5.311; 95% confidence interval [CI] = 1.124-25.09) and lower estrogen receptor expression, whereas the 1298AA genotype was associated with stage 0 (OR = 0.244; 95% CI = 0.077-0.771) and increased estrogen receptor expression. In haplotype analysis, 677CC/1298AA was associated with hypertension (OR = 1.979; 95% CI = 1.036-3.782), and 677CT/1298AC was associated with invasive carcinoma of no special type (OR = 0.472; 95% CI = 0.243-0.918) and stage 0 (OR = 3.476; 95% CI = 1.341-10.47). CONCLUSION The MTHFR C677T and A1298C polymorphisms do not alter the risk of BC, but are associated with the clinical severity of BC.
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Affiliation(s)
- Luciana Montes Rezende
- Department of Medical Genetics, Faculty of Medical Sciences, State University of Campinas - Unicamp, Cidade Universitária Zeferino Vaz, Campinas/SP, Brasil.
| | - Fernando Augusto Lima Marson
- Department of Medical Genetics, Faculty of Medical Sciences, State University of Campinas - Unicamp, Cidade Universitária Zeferino Vaz, Campinas/SP, Brasil; Department of Pediatrics, Faculty of Medical Sciences, State University of Campinas - Unicamp, Cidade Universitária Zeferino Vaz, Campinas/SP, Brasil.
| | - Carmen Sílvia Passos Lima
- Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas - Unicamp, Cidade Universitária Zeferino Vaz, Campinas/SP, Brasil
| | - Carmen Sílvia Bertuzzo
- Department of Medical Genetics, Faculty of Medical Sciences, State University of Campinas - Unicamp, Cidade Universitária Zeferino Vaz, Campinas/SP, Brasil
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20
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Costa LDA, da Silva ICB, Mariz BALA, da Silva MB, Freitas-Ribeiro GM, de Oliveira NFP. Influence of smoking on methylation and hydroxymethylation levels in global DNA and specific sites of KRT14 , KRT19 , MIR-9-3 and MIR-137 genes of oral mucosa. Arch Oral Biol 2016; 72:56-65. [DOI: 10.1016/j.archoralbio.2016.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 06/08/2016] [Accepted: 08/10/2016] [Indexed: 12/14/2022]
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21
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Llanos AAM, Marian C, Brasky TM, Dumitrescu RG, Liu Z, Mason JB, Makambi KH, Spear SL, Kallakury BVS, Freudenheim JL, Shields PG. Associations between genetic variation in one-carbon metabolism and LINE-1 DNA methylation in histologically normal breast tissues. Epigenetics 2016; 10:727-35. [PMID: 26090795 DOI: 10.1080/15592294.2015.1062205] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Genome-wide DNA hypomethylation is an early event in the carcinogenic process. Percent methylation of long interspersed nucleotide element-1 (LINE-1) is a biomarker of genome-wide methylation and is a potential biomarker for breast cancer. Understanding factors associated with percent LINE-1 DNA methylation in histologically normal tissues could provide insight into early stages of carcinogenesis. In a cross-sectional study of 121 healthy women with no prior history of cancer who underwent reduction mammoplasty, we examined associations between plasma and breast folate, genetic variation in one-carbon metabolism, and percent LINE-1 methylation using multivariable regression models (adjusting for race, oral contraceptive use, and alcohol use). Results are expressed as the ratio of LINE-1 methylation relative to that of the referent group, with the corresponding 95% confidence intervals (CI). We found no significant associations between plasma or breast folate and percent LINE-1 methylation. Variation in MTHFR, MTR, and MTRR were significantly associated with percent LINE-1 methylation. Variant allele carriers of MTHFR A1289C had 4% lower LINE-1 methylation (Ratio 0.96, 95% CI 0.93-0.98), while variant allele carriers of MTR A2756G (Ratio 1.03, 95% CI 1.01-1.06) and MTRR A66G (Ratio 1.03, 95% CI 1.01-1.06) had 3% higher LINE-1 methylation, compared to those carrying the more common genotypes of these SNPs. DNA methylation of LINE-1 elements in histologically normal breast tissues is influenced by polymorphisms in genes in the one-carbon metabolism pathway. Future studies are needed to investigate the sociodemographic, environmental and additional genetic determinants of DNA methylation in breast tissues and the impact on breast cancer susceptibility.
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Affiliation(s)
- Adana A M Llanos
- a Department of Epidemiology; Rutgers School of Public Health and the Rutgers Cancer Institute of New Jersey ; New Brunswick , NJ USA
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22
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Wang L, Shangguan S, Chang S, Yu X, Wang Z, Lu X, Wu L, Zhang T. Determining the association between methylenetetrahydrofolate reductase (MTHFR) gene polymorphisms and genomic DNA methylation level: A meta-analysis. ACTA ACUST UNITED AC 2016; 106:667-74. [PMID: 27173682 DOI: 10.1002/bdra.23511] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND The methylenetetrahydrofolate reductase (MTHFR) polymorphism is a risk factor for neural tube defects. C677T and A1298C MTHFR polymorphisms produce an enzyme with reduced folate-related one carbon metabolism, and this has been associated with aberrant methylation modifications in DNA and protein. METHODS A meta-analysis was conducted to assess the association between MTHFR C677T/A1298C genotypes and global genomic methylation. RESULTS Eleven studies met the inclusion criteria. Of these, 10 were performed on C677T MTHFR genotypes and 6 were performed on A1298C MTHFR genotypes. Our results did not indicate any correlation between global methylation and MTHFR A1298C, C677T polymorphisms. CONCLUSION The results of our study provide evidence to assess the global methylation modification alterations of MTHFR polymorphisms among individuals. However, our data did not found any conceivable proof supporting the hypothesis that common variant of MTHFR A1298C, C677T contributes to methylation modification. Birth Defects Research (Part A) 106:667-674, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Li Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shaofang Shangguan
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shaoyan Chang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xin Yu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Zhen Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiaolin Lu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Lihua Wu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Ting Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
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23
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Ortbauer M, Ripper D, Fuhrmann T, Lassi M, Auernigg-Haselmaier S, Stiegler C, König J. Folate deficiency and over-supplementation causes impaired folate metabolism: Regulation and adaptation mechanisms in Caenorhabditis elegans. Mol Nutr Food Res 2016; 60:949-56. [PMID: 27061234 DOI: 10.1002/mnfr.201500819] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/07/2015] [Accepted: 12/09/2015] [Indexed: 11/11/2022]
Abstract
SCOPE Impaired folate metabolism increases the risk of birth defects, neurodegenerative and cardiovascular disease, osteoporosis and cancer. We used Caenorhabditis elegans to investigate impaired folate metabolism by RNA interference of key enzymes in the methionine synthase (MS) and thymidylate synthase (TS) cycle and by folate deficiency and over-supplementation feeding studies. METHODS AND RESULTS Folate status is influenced by genetic variations (polymorphisms), folate deficiency and supplementation. Single RNAi of dihydrofolate reductase (DHFR), methylenetetrahydrofolate reductase (MTHFR) and MS revealed that gene regulation is largely affected in both folate cycles. Adaptation requires a close transcriptional connection between TS and MS cycle. Coupled DHFR and MS expression is required to balance both cycles, but seems to reduce the overall rate of folate conversion. Feeding studies showed that folate over-supplementation to functioning metabolism inactivates MS and MTHFR expression and enhances TS activity, which favors DNA synthesis over methylation reactions. Folate deficiency disrupted homeostasis by favoring TS cycle and led to malformation in C. elegans offspring. Embryos show aneuploidy and are nonviable lacking DNA repair during meiotic stage of diakinesis. CONCLUSION Single gene silencing alters gene expression in both cycles and disrupts folate homeostasis. Folate over-supplementation and deficiency favors TS over MS cycle and causes prophase DNA damage.
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Affiliation(s)
- Martina Ortbauer
- Department of Nutritional Sciences, University of Vienna, Austria
| | - Doris Ripper
- Department of Nutritional Sciences, University of Vienna, Austria
| | - Thomas Fuhrmann
- Department of Nutritional Sciences, University of Vienna, Austria.,Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Maximilian Lassi
- Department of Nutritional Sciences, University of Vienna, Austria
| | | | | | - Jürgen König
- Department of Nutritional Sciences, University of Vienna, Austria
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24
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Abstract
Methylation data are continuous variables with most values in a sample lying in a narrow range. In a research project they can either be the outcome, or a variable potentially explaining some of the variation in other outcomes. A range of statistical methods are appropriate depending on the experimental questions. Before the formal analysis is carried out, it is important that data are checked and cleaned. Where batch effects may be present, this should be accounted for in the analysis. Where many methylation sites are investigated in a study, attention should be given to multiple comparisons and false discovery rates, and multivariate methods such as principal component analysis may be useful.
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Affiliation(s)
- Graham W Horgan
- Biomathematics and Statistics, University of Aberdeen, Aberdeen, UK.
| | - Sok-Peng Chua
- Biomathematics and Statistics, University of Aberdeen, Aberdeen, UK
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25
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Bezerra JF, Oliveira GHM, Soares CD, Cardoso ML, Ururahy MAG, Neto FPF, Lima-Neto LG, Luchessi AD, Silbiger VN, Fajardo CM, de Oliveira SR, Almeida MDG, Hirata RDC, de Rezende AA, Hirata MH. Genetic and non-genetic factors that increase the risk of non-syndromic cleft lip and/or palate development. Oral Dis 2014; 21:393-9. [DOI: 10.1111/odi.12292] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 07/22/2014] [Accepted: 08/10/2014] [Indexed: 02/04/2023]
Affiliation(s)
- JF Bezerra
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - GHM Oliveira
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - CD Soares
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - ML Cardoso
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - MAG Ururahy
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - FPF Neto
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | | | - AD Luchessi
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - VN Silbiger
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - CM Fajardo
- Department of Clinical and Toxicological Analysis; School of Pharmaceutical Sciences; University of São Paulo; São Paulo SP Brazil
| | - SR de Oliveira
- Program for Children with Cleft lip and Palate; Pediatric Hospital Professor Heriberto Ferreira Bezerra; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - M das G Almeida
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - RDC Hirata
- Department of Clinical and Toxicological Analysis; School of Pharmaceutical Sciences; University of São Paulo; São Paulo SP Brazil
| | - AA de Rezende
- Department of Clinical and Toxicological Analysis; Federal University of Rio Grande do Norte; Natal RN Brazil
| | - MH Hirata
- Department of Clinical and Toxicological Analysis; School of Pharmaceutical Sciences; University of São Paulo; São Paulo SP Brazil
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