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Sun Y, Fowke JH, Liang X, Mozhui K, Sen S, Bao W, Liu B, Snetselaar LG, Wallace RB, Shadyab AH, Saquib N, Cheng TYD, Johnson KC. Changes in Dietary Intake of Methionine, Folate/Folic Acid and Vitamin B12 and Survival in Postmenopausal Women with Breast Cancer: A Prospective Cohort Study. Nutrients 2022; 14:nu14224747. [PMID: 36432434 PMCID: PMC9699275 DOI: 10.3390/nu14224747] [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: 09/23/2022] [Revised: 10/20/2022] [Accepted: 11/03/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Previous experimental studies showed that limiting methionine in the diet of animals or in cell culture media suppresses mammary cancer cell proliferation or metastasis. However, no previous study has investigated the associations of changes in methionine intake with survival among breast cancer survivors. We aimed to examine the association between changes in dietary intake of methionine, folate/folic acid, and vitamin B12 from before to after diagnosis of breast cancer, and mortality among breast cancer survivors. METHODS We included 1553 postmenopausal women from the Women's Health Initiative who were diagnosed with invasive breast cancer and completed a food frequency questionnaire both before and after breast cancer diagnosis. Multivariable Cox proportional hazards regression models were used to estimate adjusted hazard ratios (HRs) and 95% confidence (CIs) of all-cause and breast cancer mortality associated with changes in methionine intake and changes in folate/folic acid and vitamin B12 intake. RESULTS Relative to pre-diagnosis, 28% of women decreased methionine intake by ≥20%, 30% of women increased methionine intake by ≥20%, and 42% of women had a relatively stable methionine intake (±19.9%) following breast cancer diagnosis. During a mean 16.1 years of follow up, there were 772 deaths in total, including 195 deaths from breast cancer. Compared to women with relatively stable methionine intake, women with decreased methionine intake had lower risks of all-cause (HR 0.78, 95% CI 0.62-0.97) and breast cancer mortality (HR 0.58, 95% CI 0.37-0.91) in fully adjusted models. In contrast, increased methionine intake or changes in folate/folic acid or vitamin B12 intake were not associated with all-cause or breast cancer mortality. CONCLUSIONS Among breast cancer survivors, decreased methionine intake after breast cancer diagnosis was associated with lower risk of all-cause and breast cancer mortality.
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Affiliation(s)
- Yangbo Sun
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
- Correspondence: ; Tel.: +1-901-448-3923; Fax: +1-901-448-7041
| | - Jay H. Fowke
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
| | - Xiaoyu Liang
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
| | - Khyobeni Mozhui
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
| | - Saunak Sen
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
| | - Wei Bao
- Institute of Public Health, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
- Department of Endocrinology, Division of Life Sciences and Medicine, First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei 230026, China
| | - Buyun Liu
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | - Linda G. Snetselaar
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | - Robert B. Wallace
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | - Aladdin H. Shadyab
- Herbert Wertheim School of Public Health and Human Longevity Science, University of California, San Diego, CA 92093, USA
| | - Nazmus Saquib
- College of Medicine, Sulaiman AlRajhi University, Al Bukayriah 51941, Saudi Arabia
| | - Ting-Yuan David Cheng
- College of Public Health and Health Professions, University of Florida, Gainesville, FL 32610, USA
| | - Karen C. Johnson
- Department of Preventive Medicine, College of Medicine, The University of Tennessee Health Science Center, 66 N. Pauline Street, Memphis, TN 38163, USA
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Meng X, Zheng JL, Sun ML, Lai HY, Wang BJ, Yao J, Wang H. Association between MTHFR (677C>T and 1298A>C) polymorphisms and psychiatric disorder: A meta-analysis. PLoS One 2022; 17:e0271170. [PMID: 35834596 PMCID: PMC9282595 DOI: 10.1371/journal.pone.0271170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/25/2022] [Indexed: 11/30/2022] Open
Abstract
Recent studies showed that genetic polymorphism of 5,10-methylenetetrahydrofolate reductase (MTHFR) is related to attention-deficit hyperactivity disorder (ADHD), bipolar disorder (BD) and schizophrenia (SCZ). However, no consistent conclusion has been determined. This meta-analysis aims to interrogate the relationship between MTHFR gene polymorphisms (677C>T and 1298A>C) and the occurrence of ADHD, BD and SCZ. We retrieved case-control studies that met the inclusion criteria from the PubMed database. Associations between MTHFR polymorphisms (677C>T and 1298A>C) and ADHD, BD and SCZ were measured by means of odds ratios (ORs) using a random effects model and 95% confidence intervals (CIs). Additionally, sensitivity analysis and publication bias were performed. After inclusion criteria were met, a total of five studies with ADHD including 434 cases and 670 controls, 18 studies with BD including 4167 cases and 5901 controls and 44 studies with SCZ including 16,098 cases and 19913 controls were finally included in our meta-analysis. Overall, our meta-analytical results provided evidence that the MTHFR 677C>T was associated with occurrence of BD and SCZ, while the 1298A>C polymorphism was related to ADHD and BD, and additionally the sensitivity analysis indicated these results were stable and reliable. This may provide useful information for relevant studies on the etiology of psychiatric disorders.
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Affiliation(s)
- Xinyao Meng
- School of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China
| | - Ji-long Zheng
- Department of Forensic Medicine, China Criminal Police College, Shenyang, P.R. China
| | - Mao-ling Sun
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Hai-yun Lai
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Bao-jie Wang
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Jun Yao
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Hongbo Wang
- School of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China
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Mabhida SE, Muhamed B, Sharma JR, Apalata T, Nomatshila S, Mabasa L, Benjeddou M, Masilela C, Ziqubu K, Shabalala S, Johnson R. Methylenetetrahydrofolate Reductase Polymorphism (rs1801133) and the Risk of Hypertension among African Populations: A Narrative Synthesis of Literature. Genes (Basel) 2022; 13:genes13040631. [PMID: 35456437 PMCID: PMC9027465 DOI: 10.3390/genes13040631] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 02/07/2023] Open
Abstract
In this review, we have gathered and analyzed the available genetic evidence on the association between the methylenetetrahydrofolate reductase gene (MTHFR), rs1801133 and the risk of Hypertension (HTN) in African populations, which was further compared to the global data evidence. This review was reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol and Human Genome Epidemiology Network (HuGENet) guidelines. Literature was retrieved through major search databases, including PubMed, Scopus, Web of Science, and African Journal Online. We identified 64 potential studies, of which 4 studies were from the African continent and 60 studies were reported globally. Among the studies conducted in Africa, only two (n = 2) reported a significant association between the MTHFR (rs1801133) and the risk of developing HTN. Only one (n = 1) study population was purely composed of black Africans, while others were of other ethnicities. Among studies conducted in other continents (n = 60), forty-seven (n = 47) studies reported a positive association between MTHFR (rs1801133) and the risk of developing HTN, whereas the remaining studies (n = 14) did not show a significant association. Available literature suggests an apparent association between rs1801133 and HTN in global regions; however, such information is still scarce in Africa, especially in the black African population.
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Affiliation(s)
- Sihle E. Mabhida
- Biomedical Research and Innovation Platform, South African Medical Research Council (SAMRC), Tygerberg 7505, South Africa; (S.E.M.); (J.R.S.); (L.M.); (S.S.)
- Department of Biotechnology, Faculty of Natural Science, University of the Western Cape, Private Bag X17, Bellville, Cape Town 7535, South Africa;
| | - Babu Muhamed
- Division of Infections Disease, University of Tennessee Health Sciences Center (UTHSC), Memphis, TN 38163, USA;
| | - Jyoti R. Sharma
- Biomedical Research and Innovation Platform, South African Medical Research Council (SAMRC), Tygerberg 7505, South Africa; (S.E.M.); (J.R.S.); (L.M.); (S.S.)
| | - Teke Apalata
- Division of Medical Microbiology, Department of Laboratory-Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Mthatha 5100, South Africa;
- National Health Laboratory Services, Mthatha 5100, South Africa
| | - Sibusiso Nomatshila
- Division of Preventive Medicine and Health Behavior, Department of Public Health, Faculty of Health Sciences, Walter Sisulu University, Mthatha 5100, South Africa;
| | - Lawrence Mabasa
- Biomedical Research and Innovation Platform, South African Medical Research Council (SAMRC), Tygerberg 7505, South Africa; (S.E.M.); (J.R.S.); (L.M.); (S.S.)
| | - Mongi Benjeddou
- Department of Biotechnology, Faculty of Natural Science, University of the Western Cape, Private Bag X17, Bellville, Cape Town 7535, South Africa;
| | - Charity Masilela
- Department of Biochemistry, North-West University, Mafikeng Campus, Mmabatho 2735, South Africa; (C.M.); (K.Z.)
| | - Khanyisani Ziqubu
- Department of Biochemistry, North-West University, Mafikeng Campus, Mmabatho 2735, South Africa; (C.M.); (K.Z.)
| | - Samukelisiwe Shabalala
- Biomedical Research and Innovation Platform, South African Medical Research Council (SAMRC), Tygerberg 7505, South Africa; (S.E.M.); (J.R.S.); (L.M.); (S.S.)
- Division of Medical Microbiology, Department of Laboratory-Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Mthatha 5100, South Africa;
- National Health Laboratory Services, Mthatha 5100, South Africa
| | - Rabia Johnson
- Biomedical Research and Innovation Platform, South African Medical Research Council (SAMRC), Tygerberg 7505, South Africa; (S.E.M.); (J.R.S.); (L.M.); (S.S.)
- Centre for Cardio-Metabolic Research in Africa, Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa
- Correspondence: ; Tel.: +27-21-938-0866
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Rahimi Z, Bozorgi Zarini M, Rahimi Z, Shakiba E, Vaisi-Raygani A, Moradi MT, Yari K. Variants of Genes Involved in Metabolism of Folate Among Patients with Breast Cancer: Association of TYMS 3R Allele with Susceptibility to Breast Cancer and Metastasis. IRANIAN JOURNAL OF PATHOLOGY 2021; 16:62-68. [PMID: 33391382 PMCID: PMC7691710 DOI: 10.30699/ijp.2020.117676.2283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 06/26/2020] [Indexed: 11/24/2022]
Abstract
Background & Objective: Breast cancer (BC) is known to be the most prevalent cancer among women. One-carbon metabolism disturbance might play an important role in the etiology of BC. The present study aimed to investigate the thymidylate synthase (TYMS), 5-methyltetrahydrofolate-homocysteine methyltransferase (MTR), and methionine synthase reductase (MTRR) variants as good candidates for studying the role of genetic variants of folate metabolizing enzymes in the risk of BC. Methods: The present case-control study includes 100 BC patients and 141 healthy females. The TYMS 2R/3R (rs34743033), MTR c.2756A>G (rs1805087), and MTRR c.66A>G (rs1801394) variants were detected by polymerase chain reaction (PCR), PCR-restriction fragment length polymorphism (RFLP), and a designed amplification-refractory mutation system (ARMS) method, respectively. Results: The 3R allele of TYMS enhanced the risk of BC by 2.84-fold (P<0.001). In the presence of TYMS 3R/3R, compared to TYMS 2R/3R, there was a trend toward enhancing the risk of metastasis by 4.15-fold (95% CI: 0.96-17.85, P=0.055). The frequencies of MTR c.2756A>G and MTRR c.66A>G variants were not significantly different among patients and controls. Conclusion: We observed that the TYMS 3R is a risk allele for susceptibility to BC and this allele may increase the risk of metastasis in BC patients. .
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Affiliation(s)
- Zohreh Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.,Department of Clinical Biochemistry, Medical School, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Maryam Bozorgi Zarini
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ziba Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ebrahim Shakiba
- Department of Clinical Biochemistry, Medical School, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Asad Vaisi-Raygani
- Fertility and Infertility Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohammad Taher Moradi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Kheirolah Yari
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Chen X, Ahamada H, Zhang T, Bai Z, Wang C. Association of Intake Folate and Related Gene Polymorphisms with Breast Cancer. J Nutr Sci Vitaminol (Tokyo) 2020; 65:459-469. [PMID: 31902858 DOI: 10.3177/jnsv.65.459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Breast cancer is one of the most common malignancies in women worldwide and is associated with a variety of risk factors. Folate and vitamin B12 are key elements of the one-carbon metabolism pathway where methylenetetrahydrofolate reductase (MTHFR) plays a significant role. Though many molecular and epidemiological studies have been performed to explore the relationship between intake folate, vitamin B12, MTHFR gene polymorphism and breast cancer risk, there is no consensus to date. By reviewing the relevant literatures and summarizing the potential effect of dietary folate intake on MTHFR genes polymorphism and breast cancer risk, we conclude that MTHFR C677T gene polymorphism is associated with breast cancer risk among Asian, but not Caucasians, and the MTHFR A1298C gene polymorphism is not a susceptibility factor of breast cancers. Concomitant low activity of MTHFR enzyme resulted from C677T gene polymorphism and low dietary folate intake is associated with increased breast cancer risk.
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Affiliation(s)
- Xiang Chen
- School of Biotechnology, Jiangnan University.,National Engineering Laboratory for Cereal Fermentation Technology, Jiang Nan University
| | - Hadji Ahamada
- Hematology and Clinical Biochemistry Department, Hospital EL-Maarouf
| | - Ting Zhang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University
| | - Zhonghu Bai
- School of Biotechnology, Jiangnan University.,National Engineering Laboratory for Cereal Fermentation Technology, Jiang Nan University
| | - ChunXin Wang
- Medical Laboratory, The Affiliated Wuxi People's Hospital of Nanjing Medical University
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6
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Yao J, Qi XL, Zhang Y. The Alu-insertion progesterone receptor gene polymorphism is not associated with breast cancer: a meta-analysis. BMC MEDICAL GENETICS 2018; 19:16. [PMID: 29370776 PMCID: PMC5785830 DOI: 10.1186/s12881-018-0529-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 01/19/2018] [Indexed: 12/12/2022]
Abstract
Background The role of progesterone receptor (PGR) gene polymorphisms in breast cancer is still controversial. Here, we performed a meta-analysis to determine whether the Alu insertion is associated with an increased risk of breast cancer and, further, whether the Alu insertion contributes to the development of breast cancer. Methods Using database searches, we selected 10 controlled case studies that met a rigorous set of inclusion criteria; these studies included 2106 cases and 1660 controls. We generated odds ratios and 95% confidence intervals in order to determine the strength of the relationship between the Alu insertion and breast cancer incidence. We also performed additional subgroup analyses and sensitivity analyses to further clarify the relationship. Results Using a random effects model, we concluded that the Alu insertion was not associated with the risk of breast cancer under the dominant genetic model; the pooled OR was 1.025 (95% CI = 0.526–1.994, p = 0.943). When a subgroup analysis was performed according to ethnicity, we found that the Alu insertion was associated with breast cancer incidence in Indians and Indo-European mixed racial groups, but the association disappeared for patients of Caucasian or Latino decent. Conclusions Our meta-analysis showed that the Alu-insertion progesterone receptor gene polymorphism was not associated with breast cancer. These results provide further information regarding the association between the Alu insertion in the PGR gene and the incidence of breast cancer.
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Affiliation(s)
- Jun Yao
- School of Forensic Medicine, China Medical University, No. 77 Puhe Road, Shenbei New District, Shenyang, 110122, People's Republic of China.
| | - Xing-Ling Qi
- School of Forensic Medicine, China Medical University, No. 77 Puhe Road, Shenbei New District, Shenyang, 110122, People's Republic of China
| | - Yong Zhang
- Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, 110042, People's Republic of China
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Gamboa-Loira B, Cebrián ME, Salinas-Rodríguez A, López-Carrillo L. Genetic susceptibility to breast cancer risk associated with inorganic arsenic exposure. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 56:106-113. [PMID: 28889078 DOI: 10.1016/j.etap.2017.08.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 08/29/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To evaluate whether the association between breast cancer (BC) and inorganic arsenic (iAs) exposure is modulated by selected polymorphisms in iAs metabolism. METHODS A population based case-control (1016/1028) study was conducted in Northern Mexico. Urinary arsenic metabolites were measured by High Performance Liquid Chromatography. Metabolites percentages and methylation ratios, were estimated. Genotypes of selected polymorphisms were determined by allelic discrimination. The interaction between polymorphisms and iAs metabolites percentages and methylation ratios on BC was assessed with unconditional logistic regression models. RESULTS A significant interaction (p=0.002) between MTR c.2756A>G polymorphism and percentage dimethylarsinic acid (DMA) on BC was found; BC risk related with %DMA was lower in AG+GG carriers than in AA carriers. No other significant interactions were found. CONCLUSION MTR c.2756A>G polymorphism may confer protection for BC associated with iAs exposure. Further research is warranted to elucidate the potential involvement of other polymorphisms in iAs-related BC.
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Affiliation(s)
- Brenda Gamboa-Loira
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P. 62100, Cuernavaca, Morelos, Mexico.
| | - Mariano E Cebrián
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del IPN, Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Del. Gustavo A. Madero, C.P. 07360, Ciudad de México, Mexico.
| | - Aarón Salinas-Rodríguez
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P. 62100, Cuernavaca, Morelos, Mexico.
| | - Lizbeth López-Carrillo
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P. 62100, Cuernavaca, Morelos, Mexico.
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Zhai Z, Wang Z, Wang L, Chen S, Ren H, Wang D. Relationship between inducible NOS single-nucleotide polymorphisms and hypertension in Han Chinese. Herz 2017; 43:461-465. [PMID: 28685250 DOI: 10.1007/s00059-017-4591-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/31/2017] [Accepted: 06/05/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Inducible nitric oxide synthase (iNOS) single-nucleotide polymorphisms have been reported to confer susceptibility to hypertension, but no consensus has been reached. The aim of this study was to investigate the association between iNOS and hypertension in a Chinese population. METHODS This was a case-control study including 1172 hypertensive and 1172 control subjects to investigate the association between iNOS and hypertension. RESULTS There were significant differences in the distribution of genotype and allele frequencies of rs2779249 and rs2297518 between hypertensive and normotensive subjects. Logistic regression analyses were performed with different genetic models (additive, dominant, recessive) adjusting for confounding risk covariates, including age, sex, body mass index, total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, smoking, drinking, and family history of hypertension. The odds ratio (OR) was 1.27 (1.12, 1.44) in the additive model, 1.31 (1.09, 1.59) in the dominant, and 1.68 (1.28, 2.19) in the recessive model of rs2779249; the OR was 1.26 (1.06, 1.50) in the additive model and 1.46 (1.13, 1.89) in the dominant model of rs2297518. CONCLUSION The current study provides evidence that iNOS is strongly associated with hypertension.
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Affiliation(s)
- Z Zhai
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, Hubei, China.,Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - Z Wang
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China.
| | - L Wang
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - S Chen
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - H Ren
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - D Wang
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, Hubei, China
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Amrani-Midoun A, Kiando SR, Treard C, Jeunemaitre X, Bouatia-Naji N. The relationship between MTHFR C677T gene polymorphism and essential hypertension in a sample of an Algerian population of Oran city. Int J Cardiol 2016; 225:408-411. [PMID: 27780089 DOI: 10.1016/j.ijcard.2016.10.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/05/2016] [Accepted: 10/09/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Many studies have investigated the role of 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T gene polymorphism in essential hypertension (EH), but with conflicting results. AIM To determine the eventual association between 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T gene polymorphism and hypertension in a sample of Algerian population from the Oran city. METHODS A case-control study has been performed in 154 subjects including 82 hypertensives defined as subjects with elevated systolic blood pressure SBD≥140mmHg and or sustained diastolic blood pressure DBP≥90mmHg, and 72 normotensive subjects. Polymerase chain reaction (PCR) combined with restrictive fragment length polymorphism (RFLP) was used to detect the MTHFR C677T variant. RESULTS We observe no significant differences between allelic and genotypic frequencies between cases and controls for C677T polymorphism (OR=1.51, 95% CI=0.89-2.56, P=0.13). Analyses adjusted for age, sex and body mass index improved the association level, though the association was still not significant (30% vs. 22%, OR=1.75, 95% CI=0.95-3.24, P=0.07). CONCLUSION This work showed that genetic polymorphism related to the MTHFR gene (C677T) is not associated with the risk of hypertension in this sample of Algerian population. Larger case-control samples are required to clearly assess the role of this genetic variant in EH.
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Affiliation(s)
- Asma Amrani-Midoun
- Biotechnology Department, Faculty of Sciences of Nature and Life, University of Oran 1 Ahmed Benbella, Oran, Algeria.
| | - Soto Romuald Kiando
- INSERM, UMR970 Paris Cardiovascular Research Center (PARCC), Paris F-75015, France; Paris-Descartes University, Sorbonne Paris Cité, Paris 75006, France
| | - Cyrielle Treard
- INSERM, UMR970 Paris Cardiovascular Research Center (PARCC), Paris F-75015, France; Paris-Descartes University, Sorbonne Paris Cité, Paris 75006, France
| | - Xavier Jeunemaitre
- INSERM, UMR970 Paris Cardiovascular Research Center (PARCC), Paris F-75015, France; Paris-Descartes University, Sorbonne Paris Cité, Paris 75006, France; AP-HP, Department of Genetics, Hôpital Européen Georges Pompidou, Paris F-75015, France
| | - Nabila Bouatia-Naji
- INSERM, UMR970 Paris Cardiovascular Research Center (PARCC), Paris F-75015, France; Paris-Descartes University, Sorbonne Paris Cité, Paris 75006, France
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10
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Population-level diversity in the association of genetic polymorphisms of one-carbon metabolism with breast cancer risk. J Community Genet 2016; 7:279-290. [PMID: 27541683 DOI: 10.1007/s12687-016-0277-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/08/2016] [Indexed: 01/01/2023] Open
Abstract
Aberrations in one-carbon metabolism were reported to increase breast cancer risk by influencing the DNA synthesis and methylation of DNA and catecholamines. However, the results of these association studies remain inconclusive. We have explored the contribution of eight genetic polymorphisms in modulating the susceptibility to breast cancer by performing a meta-analysis of worldwide studies. In total, 62 case-control studies representing 17 different populations involving 18,117 breast cancer cases and 23,573 healthy controls were included in this meta-analysis. Out of the eight polymorphisms analyzed, methylenetetrahydrofolate reductase (MTHFR) C677T exhibited positive association with the breast cancer risk in both fixed effects (OR 1.14, 95 % CI 1.10-1.17) and random effects (OR 1.10, 95 % CI 1.02-1.18) models. Solute carrier family 19 (folate transporter), member 1 (SLC19A1) G80A exhibited positive association (OR 1.16, 95 % CI 1.03-1.31) while MTR A2756G exhibited an inverse association (OR 0.78, 95 % CI 0.75-0.82) with the breast in fixed effect model alone. Significant heterogeneity was observed in the association of MTHFR C677T with breast cancer even between studies from the same geographical area, specifically among Chinese, Indians, and Turks. Subgroup analysis revealed MTHFR C677T-mediated breast cancer risk in post-menopausal women and women with low dietary intake of folate. Geographical area wise segregation of data revealed MTHFR-mediated increased breast cancer risk in populations who consume methionine-rich diet. Altitude-level variations were observed in the association of SHMT1 C1420T with breast cancer. India and Brazil of same altitude showed an inverse association with this polymorphism, while USA and China that share similar altitude showed a null association. MTHFR C677T and SLC19A1 G80A are the two polymorphisms of one-carbon metabolic pathway that increase breast cancer in the worldwide population. Dietary patterns and altitudinal variations are the likely risk modulators that are contributing toward ethnic- and population-level variations in genetic associations.
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Song A, Zhao L, Li Y, Wu L, Li Y, Liu X, Lan S. Haplotypes of the MTHFR gene are associated with an increased risk of breast cancer in a Han Chinese population in Gansu province. IUBMB Life 2016; 68:526-34. [PMID: 27237471 DOI: 10.1002/iub.1509] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 01/25/2023]
Abstract
Elevated homocysteine levels are a risk factor for breast cancer, although the mechanism underlying this effect is unknown. Genome-wide association studies were used to systematically identify genetic variants which were significantly associated with the circulating homocysteine concentration. To examine the role of homocysteine-related variants in the occurrence of breast cancer, we investigated the association between these variants and breast cancer in a Han Chinese population. Five variants of genome-wide significant homocysteine-related genes were selected for the analysis in a case-control study, with a total of 487 patients with breast cancer and 605 controls. We found that none of the studied polymorphisms were related to the altered breast cancer risk. In the haplotypic analysis, the 5,10-methylenetetrahydrofolate reductase (MTHFR) haplotypes rs12085006A/rs1999594G/rs1801133C (OR = 3.44, 95% CI = 1.58-7.50, P = 0.0019) and rs12085006A/rs1999594G/rs1801133T (OR = 16.21, 95% CI = 2.19- 120.32, P = 0.0065) were significantly associated with an increased breast cancer risk when compared with the wild-type haplotype. Both of the risky MTHFR haplotypes were correlated with decreased MTHFR gene expression and elevated homocysteine concentrations, indicating a genetic component for hyperhomocysteinemia. The MTHFR haplotypes reconstructed with homocysteine-related variants were associated with the occurrence of breast cancer. This finding further emphasizes the importance of homocysteine metabolism genes in breast carcinogenesis and highlights the interplay of diet, genetics, and human cancers. © 2016 IUBMB Life, 68(7):526-534, 2016.
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Affiliation(s)
- Ailing Song
- Key Laboratory of Digestive System Tumors of Gansu Province, Gansu, People's Republic of China.,Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Lei Zhao
- Key Laboratory of Digestive System Tumors of Gansu Province, Gansu, People's Republic of China.,Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Yumin Li
- Key Laboratory of Digestive System Tumors of Gansu Province, Gansu, People's Republic of China.,Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Li Wu
- Depertment of Breast Surgery, The First Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Yu Li
- Key Laboratory of Digestive System Tumors of Gansu Province, Gansu, People's Republic of China.,Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Xiaokang Liu
- Key Laboratory of Digestive System Tumors of Gansu Province, Gansu, People's Republic of China.,Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Shen Lan
- Depertment of Surgery, The Second Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
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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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Pan YQ, Qiao L, Xue XD, Fu JH. Association between ANKK1 (rs1800497) polymorphism of DRD2 gene and attention deficit hyperactivity disorder: a meta-analysis. Neurosci Lett 2015; 590:101-5. [PMID: 25641135 DOI: 10.1016/j.neulet.2015.01.076] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 01/28/2015] [Indexed: 12/18/2022]
Abstract
The role of dopamine neurotransmitter in attention deficit hyperactivity disorder (ADHD) remains controversial. Many molecular studies focusing on dopamine receptors have attempted to analyze the gene polymorphisms involved in dopaminergic transmission. Of these, rs1800497 (TaqIA) single nucleotide polymorphism (SNP) of the dopamine D2 receptor (DRD2) gene has been focused on by the most attention. However, this locus has recently been identified within the exon 8 of ankyrin repeat and kinase domain containing 1 (ANKK1), giving rise to a Glu713-to-Lys substitution in the putative ANKK1 protein. Thus, we performed a meta-analysis to determine whether ANKK1 polymorphism influences the risk of ADHD and examined the relationship between rs1800497 genetic variant and the etiology of ADHD. Relevant case-control studies were retrieved by database searches and selected according to established inclusion criteria. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the associations. Meta-regression, subgroup analysis, sensitivity analysis and cumulative meta-analysis were performed. A total of 11 studies with 1645 cases and 1641 controls were included. In the dominant model, the rs1800497 locus was associated with ADHD, with a pooled OR of 1.785 (95% CI=1.068-2.984, p=0.027). Subgroup analysis for ethnicity indicated that the polymorphism was associated with ADHD in Africans (OR=3.286, 95% CI=1.434-7.527, p=0.005), but not in East Asians (OR=1.513, 95% CI=0.817-2.805, p=0.188) and Caucasians (OR=1.740, 95% CI=0.928-3.263, p=0.084). However, the results of meta-regression indicated that publication date (p=0.601), source of controls (p=0.685), ethnicity (p=0.755) and diagnostic criteria (p=0.104) could not explain the potential sources of heterogeneity. This meta-analysis indicates that the rs1800497 locus may be associated with ADHD. These data provide possible references for future case-control studies in childhood disorders.
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Affiliation(s)
- Yu-Qing Pan
- Department of Pediatrics, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Lin Qiao
- Department of Pediatrics, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Xin-Dong Xue
- Department of Pediatrics, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Jian-Hua Fu
- Department of Pediatrics, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China.
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Single-nucleotide polymorphisms in one-carbon metabolism genes, Mediterranean diet and breast cancer risk: a case-control study in the Greek-Cypriot female population. GENES AND NUTRITION 2015; 10:453. [PMID: 25604861 DOI: 10.1007/s12263-015-0453-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 01/05/2015] [Indexed: 01/24/2023]
Abstract
Single-nucleotide polymorphisms (SNPs) within genes of the one-carbon metabolism pathway have been shown to interact with dietary folate intake to modify breast cancer (BC) risk. Our group has previously demonstrated that the Mediterranean dietary pattern, rich in beneficial one-carbon metabolism micronutrients, protects against BC in Greek-Cypriot women. We aimed to investigate whether SNPs in the MTHFR (rs1801133 and rs1801131) and MTR (rs1805087) genes modify the effect of the Mediterranean dietary pattern on BC risk. Dietary intake data were obtained using a 32-item food-frequency questionnaire. A dietary pattern specific to the Greek-Cypriot population, which closely resembles the Mediterranean diet, was derived using principal component analysis (PCA) and used as our dietary variable. Genotyping was performed on subjects from the MASTOS study, a case-control study of BC in Cyprus, using TaqMan assays. Adjusted odds ratios (ORs) were estimated using logistic regression analyses. High adherence to the PCA-derived Mediterranean dietary pattern further reduced BC risk with increasing number of variant MTHFR 677T alleles (ORQ4vs.Q1 for 677TT = 0.37, 95 % CI 0.20-0.69, for 677 CT = 0.60, 95 % CI 0.42-0.86). Additionally, high adherence to the Mediterranean dietary pattern decreased BC risk in subjects with at least one MTR 2756A allele (ORQ4vs.Q1 for 2756AA = 0.59, 95 % CI 0.43-0.81, for 2756AG = 0.59, 95 % CI 0.39-0.91) and in subjects with the MTHFR 1298CC genotype (ORQ4vs.Q1 0.44, 95 % CI 0.30-0.65). Overall P-interaction values, however, were not statistically significant. Our study suggests that these MTHFR and MTR SNPs may act as effect modifiers, highlighting their biological significance in the association between Mediterranean diet, the one-carbon metabolism pathway and BC.
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Yao J, Pan YQ, Ding M, Pang H, Wang BJ. Association between DRD2 (rs1799732 and rs1801028) and ANKK1 (rs1800497) polymorphisms and schizophrenia: a meta-analysis. Am J Med Genet B Neuropsychiatr Genet 2015; 168B:1-13. [PMID: 25504812 DOI: 10.1002/ajmg.b.32281] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 10/16/2014] [Indexed: 01/22/2023]
Abstract
The role of dopamine D2 receptor (DRD2) polymorphisms in schizophrenia remains controversial. We performed a meta-analysis to determine whether DRD2 polymorphisms influence the risk of schizophrenia and examined the relationship between rs1799732, rs1801028, and rs1800rs028 an23381d rs1800497 genetic variants and the etiology of schizophrenia. Relevant case-control studies were retrieved by database searches and selected according to established inclusion criteria. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the associations. Meta-regression, subgroup analysis, sensitivity analysis, and cumulative meta-analysis were performed. A total of 76 studies with 16096 cases and 18965 controls were included. Specifically, 24 studies with 6075 cases and 6643 controls involved rs1799732, 36 studies with 8043 cases and 10194 controls involved rs1801028 and 16 studies with 1978 cases and 2128 controls involved rs1800497. No significant associations were observed between rs1799732 and rs1800rs732 and rs1800497 and schizophrenia. The rs1801028 locus was associated with schizophrenia, with a pooled OR of 1.221 (95% CI = 1.037-1.438, P = 0.016). This meta-analysis indicates that the rs1801028 locus may be associated with schizophrenia. These data provide possible references for future case-control studies related to schizophrenia.
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Affiliation(s)
- Jun Yao
- School of Forensic Medicine, China Medical University, Shenyang, 110001, China
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Chang SC, Chang PY, Butler B, Goldstein BY, Mu L, Cai L, You NCY, Baecker A, Yu SZ, Heber D, Lu QY, Li L, Greenland S, Zhang ZF. Single nucleotide polymorphisms of one-carbon metabolism and cancers of the esophagus, stomach, and liver in a Chinese population. PLoS One 2014; 9:e109235. [PMID: 25337902 PMCID: PMC4206280 DOI: 10.1371/journal.pone.0109235] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 09/09/2014] [Indexed: 12/12/2022] Open
Abstract
One-carbon metabolism (folate metabolism) is considered important in carcinogenesis because of its involvement in DNA synthesis and biological methylation reactions. We investigated the associations of single nucleotide polymorphisms (SNPs) in folate metabolic pathway and the risk of three GI cancers in a population-based case-control study in Taixing City, China, with 218 esophageal cancer cases, 206 stomach cancer cases, 204 liver cancer cases, and 415 healthy population controls. Study participants were interviewed with a standardized questionnaire, and blood samples were collected after the interviews. We genotyped SNPs of the MTHFR, MTR, MTRR, DNMT1, and ALDH2 genes, using PCR-RFLP, SNPlex, or TaqMan assays. To account for multiple comparisons and reduce the chances of false reports, we employed semi-Bayes (SB) shrinkage analysis. After shrinkage and adjusting for potential confounding factors, we found positive associations between MTHFR rs1801133 and stomach cancer (any T versus C/C, SB odds-ratio [SBOR]: 1.79, 95% posterior limits: 1.18, 2.71) and liver cancer (SBOR: 1.51, 95% posterior limits: 0.98, 2.32). There was an inverse association between DNMT1 rs2228612 and esophageal cancer (any G versus A/A, SBOR: 0.60, 95% posterior limits: 0.39, 0.94). In addition, we detected potential heterogeneity across alcohol drinking status for ORs relating MTRR rs1801394 to esophageal (posterior homogeneity P = 0.005) and stomach cancer (posterior homogeneity P = 0.004), and ORs relating MTR rs1805087 to liver cancer (posterior homogeneity P = 0.021). Among non-alcohol drinkers, the variant allele (allele G) of these two SNPs was inversely associated with the risk of these cancers; while a positive association was observed among ever-alcohol drinkers. Our results suggest that genetic polymorphisms related to one-carbon metabolism may be associated with cancers of the esophagus, stomach, and liver. Heterogeneity across alcohol consumption status of the associations between MTR/MTRR polymorphisms and these cancers indicates potential interactions between alcohol drinking and one-carbon metabolic pathway.
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Affiliation(s)
- Shen-Chih Chang
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Po-Yin Chang
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Brendan Butler
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Binh Y. Goldstein
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Lina Mu
- Department of Social and Preventive Medicine, State University of New York at Buffalo, Buffalo, NY, United States of America
| | - Lin Cai
- Department of Epidemiology, Fujian Medical University, Fuzhou, Fujian, China
| | - Nai-Chieh Y. You
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Aileen Baecker
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
| | - Shun-Zhang Yu
- Department of Epidemiology, Fudan University School of Public Health, Shanghai, China
| | - David Heber
- Center for Human Nutrition, University of California Los Angeles David Geffen School of Medicine, Los Angeles, CA, United States of America
| | - Qing-Yi Lu
- Center for Human Nutrition, University of California Los Angeles David Geffen School of Medicine, Los Angeles, CA, United States of America
| | - Liming Li
- Department of Epidemiology, Peking University School of Public Health, Beijing, China
| | - Sander Greenland
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
- Department of Statistics, University of California Los Angeles College of Letters and Science, Los Angeles, CA, United States of America
| | - Zuo-Feng Zhang
- Department of Epidemiology, University of California Los Angeles Fielding School of Public Health, Los Angeles, CA, United States of America
- * E-mail:
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Yang B, Fan S, Zhi X, Li Y, Liu Y, Wang D, He M, Hou Y, Zheng Q, Sun G. Associations of MTHFR gene polymorphisms with hypertension and hypertension in pregnancy: a meta-analysis from 114 studies with 15411 cases and 21970 controls. PLoS One 2014; 9:e87497. [PMID: 24505291 PMCID: PMC3914818 DOI: 10.1371/journal.pone.0087497] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 12/24/2013] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Several epidemiological studies have investigated the associations of methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms with hypertension (H) or hypertension in pregnancy (HIP). However, the results were controversial. We therefore performed a comprehensive meta-analysis to provide empirical evidences on the associations. METHODOLOGIES The English and Chinese databases were systematically searched to identify relevant studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the associations. Meta-regression, subgroup analysis, sensitivity analysis, cumulative meta-analysis and assessment of publication bias were performed in our study. PRINCIPAL FINDINGS A total of 114 studies with 15411 cases and 21970 controls were included, 111 studies with 15094 cases and 21633 controls for the C677T polymorphism and 21 with 2533 cases and 2976 controls for the A1298C polymorphism. Overall, the C677T polymorphism was significantly associated with H and HIP (H & HIP: OR = 1.26, 95% CI = 1.17-1.34; H: OR = 1.36, 95% CI = 1.20-1.53; HIP: OR = 1.21, 95% CI = 1.08-1.32). Stratified analysis by ethnicity revealed a significant association among East Asians and Caucasians, but not among Latinos, Black Africans, and Indians and Sri Lankans. In the stratified analyses according to source of controls, genotyping method, sample size and study quality, significant associations were observed in all the subgroups, with the exception of population based subgroup in H studies and large sample size and "others" genotyping method subgroups in HIP studies. For the A1298C polymorphism, no significant association was observed either in overall or subgroup analysis under all genetic models. CONCLUSIONS This meta-analysis suggests that the MTHFR C677T rather than A1298C polymorphism may be associated with H & HIP, especially among East Asians and Caucasians.
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Affiliation(s)
- Boyi Yang
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Shujun Fan
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Xueyuan Zhi
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Yongfang Li
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Yuyan Liu
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Da Wang
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Miao He
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Yongyong Hou
- Department of Medical and Molecular Genetics, School of Medicine, Indiana University, Indianapolis, Indiana, United States of America
| | - Quanmei Zheng
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
| | - Guifan Sun
- Environment and Non-Communicable Diseases Research Center, School of Public Health, China Medical University, Shenyang, China
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Association study of germline variants in CCNB1 and CDK1 with breast cancer susceptibility, progression, and survival among Chinese Han women. PLoS One 2013; 8:e84489. [PMID: 24386390 PMCID: PMC3873991 DOI: 10.1371/journal.pone.0084489] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 11/15/2013] [Indexed: 11/19/2022] Open
Abstract
The CCNB1 and CDK1 genes encode the proteins of CyclinB1 and CDK1 respectively, which interact with each other and are involved in cell cycle regulation, centrosome duplication and chromosome segregation. This study aimed to investigate whether the genetic variants in these two genes may affect breast cancer (BC) susceptibility, progression, and survival in Chinese Han population using haplotype-based analysis. A total of ten tSNPs spanning from 2kb upstream to 2kb downstream of these genes were genotyped in 1204 cases and 1204 age-matched cancer-free controls. The haplotype blocks were determined according to our genotyping data and linkage disequilibrium (LD) status of these SNPs. For CCNB1, rs2069429 was significantly associated with increased BC susceptibility under recessive model (OR=2.352, 95%CI=1.480-3.737), so was the diplotype TAGT/TAGT (OR=1.947 95%CI=1.154-3.284, P=0.013). In addition, rs164390 was associated with Her2-negative BC. For CDK1, rs2448343 and rs1871446 were significantly associated with decreased BC risk under dominant models, so was the haplotype ATATT. These two SNPs also showed a dose-dependent effect on BC susceptibility. Using stratified association analysis, we found that women with the heterozygotes or minor allele homozygotes of rs2448343 had much less BC susceptibility among women with BMI<23. In CDK1, three closely located SNPs, rs2448343, rs3213048 and rs3213067, were significantly associated with tumor’s PR status: the heterozygotes of rs2448343 were associated with PR-positive tumors, while the minor allele homozygotes of rs3213048 and heterozygotes of rs3213067 were associated with PR-negative BC tumors. In survival analysis, rs1871446 was associated with unfavorable event-free survival under recessive model, so was the CDK1 diplotype ATATG/ATATG, which carried the minor allele homozygote of rs1871446. Our study indicates that genetic polymorphisms of CCNB1 and CDK1 are related to BC susceptibility, progression, and survival in Chinese Han women. Further studies need to be performed in other populations as an independent replication to verify these results.
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