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Maksimova VP, Usalka OG, Makus YV, Popova VG, Trapeznikova ES, Khayrieva GI, Sagitova GR, Zhidkova EM, Prus AY, Yakubovskaya MG, Kirsanov KI. Aberrations of DNA methylation in cancer. ADVANCES IN MOLECULAR ONCOLOGY 2022. [DOI: 10.17650/2313-805x-2022-9-4-24-40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
DNA methylation is a chromatin modification that plays an important role in the epigenetic regulation of gene expression. Changes in DNA methylation patterns are characteristic of many malignant neoplasms. DNA methylation is occurred by DNA methyltransferases (DNMTs), while demethylation is mediated by TET family proteins. Mutations and changes in the expression profile of these enzymes lead to DNA hypo- and hypermethylation and have a strong impact on carcinogenesis. In this review, we considered the key aspects of the mechanisms of regulation of DNA methylation and demethylation, and also analyzed the role of DNA methyltransferases and TET family proteins in the pathogenesis of various malignant neoplasms.During the preparation of the review, we used the following biomedical literature information bases: Scopus (504), PubMed (553), Web of Science (1568), eLibrary (190). To obtain full-text documents, the electronic resources of PubMed Central (PMC), Science Direct, Research Gate, CyberLeninka were used. To analyze the mutational profile of epigenetic regulatory enzymes, we used the cBioportal portal (https://www.cbioportal.org / ), data from The AACR Project GENIE Consortium (https://www.mycancergenome.org / ), COSMIC, Clinvar, and The Cancer Genome Atlas (TCGA).
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Affiliation(s)
- V. P. Maksimova
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia
| | - O. G. Usalka
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia; Sechenov First Moscow State Medical University, Ministry of Health of Russia
| | - Yu. V. Makus
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia; Peoples’ Friendship University of Russia
| | - V. G. Popova
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia; Mendeleev University of Chemical Technology of Russia
| | - E. S. Trapeznikova
- Sechenov First Moscow State Medical University, Ministry of Health of Russia
| | - G. I. Khayrieva
- Sechenov First Moscow State Medical University, Ministry of Health of Russia
| | - G. R. Sagitova
- Sechenov First Moscow State Medical University, Ministry of Health of Russia
| | - E. M. Zhidkova
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia
| | - A. Yu. Prus
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia; MIREA – Russian Technological University
| | - M. G. Yakubovskaya
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia
| | - K. I. Kirsanov
- N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia; Peoples’ Friendship University of Russia
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Adehin A, Kennedy MA, Soyinka JO, Alatise OI, Olasehinde O, Bolaji OO. Breast Cancer and Tamoxifen: A Nigerian Perspective to Effective Personalised Therapy. BREAST CANCER-TARGETS AND THERAPY 2020; 12:123-130. [PMID: 33116814 PMCID: PMC7548221 DOI: 10.2147/bctt.s266314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/08/2020] [Indexed: 12/24/2022]
Abstract
Estrogen-receptor positivity in tumour, often requiring long-term tamoxifen therapy, is thought to characterise between 43% and 65% of breast cancer cases in Nigeria. The patient population is further marked by late-stage diagnosis which significantly heightens the tendency for tumour relapse in the course of tamoxifen therapy. Despite tamoxifen being considered a reliable chemopreventive in high-risk individuals and an effective adjuvant therapy for hormone-sensitive tumours, mortality has remained high among breast cancer patients in the West African region where Nigeria belongs. The Nigerian breast cancer population, like other similar patient-populations in the West African region, provides a mix of intrinsic genome-diversity and perhaps unique tumour biology and evolution. These peculiarities suggest the need for a rational approach to tumour management and a personalised delivery of therapy in Nigeria's dominant estrogen-receptor-positive patient population. Herein, critical indices of tamoxifen-therapy success are discussed in the context of the Nigerian breast cancer population with emphasis on salient aspects of tamoxifen-biotransformation, host- and tumour-genomics, and epigenetics.
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Affiliation(s)
- Ayorinde Adehin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Nigeria.,Institute of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, People's Republic of China
| | - Martin Alexander Kennedy
- Department of Pathology and Biomedical Science; Carney Centre of Pharmacogenomics, University of Otago, Christchurch, New Zealand
| | - Julius Olugbenga Soyinka
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Olusegun Isaac Alatise
- Department of Surgery, Faculty of Clinical Sciences, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Olalekan Olasehinde
- Department of Surgery, Faculty of Clinical Sciences, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Oluseye Oladotun Bolaji
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Nigeria
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Wong KK. DNMT1: A key drug target in triple-negative breast cancer. Semin Cancer Biol 2020; 72:198-213. [PMID: 32461152 DOI: 10.1016/j.semcancer.2020.05.010] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/04/2020] [Accepted: 05/18/2020] [Indexed: 02/06/2023]
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer. Altered epigenetics regulation including DNA hypermethylation by DNA methyltransferase 1 (DNMT1) has been implicated as one of the causes of TNBC tumorigenesis. In this review, the oncogenic functions rendered by DNMT1 in TNBCs, and DNMT1 inhibitors targeting TNBC cells are presented and discussed. In summary, DNMT1 expression is associated with poor breast cancer survival, and it is overexpressed in TNBC subtype. The oncogenic roles of DNMT1 in TNBCs include: (1) Repression of estrogen receptor (ER) expression; (2) Promotion of epithelial-mesenchymal transition (EMT) required for metastasis; (3) Induces cellular autophagy and; (4) Promotes the growth of cancer stem cells in TNBCs. DNMT1 confers these phenotypes by hypermethylating the promoter regions of ER, multiple tumor suppressor genes, microRNAs and epithelial markers involved in suppressing EMT. DNMT1 inhibitors exert anti-tumorigenic effects against TNBC cells. This includes the hypomethylating agents azacitidine, decitabine and guadecitabine that might sensitize TNBC patients to immune checkpoint blockade therapy. DNMT1 represents an epigenetic target for TNBC cells destruction as well as to derail their metastatic and aggressive phenotypes.
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Affiliation(s)
- Kah Keng Wong
- Department of Immunology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
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Ahmed AAM, Azova MM, Ramazanova FU, Gigani OB. DNMT1 and DNMT3A Gene Polymorphisms and Early Pregnancy Loss. RUSS J GENET+ 2020. [DOI: 10.1134/s1022795420030023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Zhang Y, Li Y, Luo L, He Q, Gao Y, Feng H, Zhao L, Wei W, Fu S, Sun D. Factors Affecting Differential Methylation of DNA Promoters in Arsenic-Exposed Populations. Biol Trace Elem Res 2019; 189:437-446. [PMID: 30220071 DOI: 10.1007/s12011-018-1504-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/30/2018] [Indexed: 01/15/2023]
Abstract
The exposure/biotransformation of inorganic arsenic (iAs) may perturb DNA methylation patterns and subsequently influence disease risk by altering the expression of key genes. Interindividual variation in patterns of DNA methylation can be explained by the influence of environmental, genetic, and stochastic factors. Here, we examined promoter DNA methylation levels with urinary arsenical concentrations and investigated the genetic and nongenetic determinants of DNA methylation in 105 samples collected from populations in Shanxi Province, China, with high levels of arsenic in drinking water. Arsenic concentrations in water were determined by atomic absorption spectrophotometry (AA-6800, Shimadzu Co., Kyoto, Japan). Urine samples were measured using an atomic absorption spectrophotometer with an arsenic speciation pretreatment system (ASA-2sp, Shimadzu Co. Kyoto, Japan) for detection. Gene-specific (CDH1, EREG, ERCC2, GSTP1, and MGMT) DNA methylation was quantified by targeted bisulfite sequencing. Single-nucleotide polymorphism (SNP) genotyping was performed using a custom-by-design 2 × 48-Plex SNPscan™ Kit. These results revealed CDH1 with promoter DNA methylation levels associated with iAs. After the exclusion of confounding factors, age was correlated with increased methylation of the CDH1 gene. The susceptibility of the CDH1 and GSTP1 gene promoters to methylation was increased in individuals carrying the DNMT3B (SNP rs2424932) GA genotype, and the susceptibility of the CDH1 gene promoters to methylation was increased in individuals carrying the DNMT3B (SNP rs6087990) TC genotype. Although the above results must still be replicated in larger samples, the findings improve our understanding of the pathogenesis of arsenic and may highlight certain DNA methylation markers as attractive surrogate markers for prevention research.
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Affiliation(s)
- Yanting Zhang
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Yuanyuan Li
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Lanrong Luo
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Qian He
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Yanhui Gao
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Hongqi Feng
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Lijun Zhao
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Wei Wei
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China
| | - Songbo Fu
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China.
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China.
| | - Dianjun Sun
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, China.
- Key Lab of Etiology and Epidemiology, Education Bureau of Hei Long Jiang Province & Ministry of Health, Harbin, 150081, China.
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A Meta-Analysis of the Association between DNMT1 Polymorphisms and Cancer Risk. BIOMED RESEARCH INTERNATIONAL 2017; 2017:3971259. [PMID: 28473984 PMCID: PMC5394348 DOI: 10.1155/2017/3971259] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/20/2017] [Indexed: 12/11/2022]
Abstract
Previous studies have examined the associations of DNA methyltransferase 1 (DNMT1) polymorphisms, including single nucleotide polymorphisms rs16999593 (T/C), rs2228611 (G/A), and rs2228612 (A/G), with cancer risk. However, the results are inconclusive. The aim of this meta-analysis is to elucidate the associations between DNMT1 polymorphisms and cancer susceptibility. The PubMed, Embase, Web of Science, and Chinese National Knowledge Infrastructure databases were searched systematically to identify potentially eligible reports. Odd ratios and 95% confidence intervals were used to evaluate the strength of association between three DNMT1 polymorphisms and cancer risk. A total of 16 studies were finally included in the meta-analysis, namely, nine studies of 3378 cases and 4244 controls for rs16999593, 11 studies of 3643 cases and 3866 controls for rs2228611, and three studies of 1343 cases and 1309 controls for rs2228612. The DNMT1 rs2228612 (A/G) polymorphism was significantly related to cancer risk in the recessive model. The meta-analysis also suggested that DNMT1 rs16999593 (T/C) may be associated with gastric cancer, while rs2228611 (G/A) may be associated with breast cancer. In future research, large-scale and well-designed studies are required to verify these findings.
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Lei L, Lin H, Zhong S, Zhang Z, Chen J, Yu X, Liu X, Zhang C, Nie Z, Zhuang J. DNA methyltransferase 1 rs16999593 genetic polymorphism decreases risk in patients with transposition of great arteries. Gene 2017; 615:50-56. [PMID: 28323001 DOI: 10.1016/j.gene.2017.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 03/09/2017] [Accepted: 03/15/2017] [Indexed: 11/19/2022]
Abstract
Complete transposition of the great arteries (TGA) is the most frequent cyanotic heart defect diagnosed in neonates. However, the exact etiology of TGA is unknown. The aim of the present study was to assess the association of TGA pathogenesis with single nucleotide polymorphisms (SNPs) in DNA methyltransferases (DNMTs)-1 and 3a- in Chinese children. We genotyped 5 SNPs (rs16999593, rs16999358, and rs2228611 in DNMT1; and rs2276599 and rs2276598 in DNMT3A) in 206 patients with complete TGA and 252 healthy children. Statistical analysis was performed to explore the association of the 5 SNPs with complete TGA susceptibility. Compared with the T/T and C/C genotypes, the heterozygous genotype C/T of rs16999593 correlated with a decreased risk for complete TGA under codominant (OR=0.46; 95% CI=0.29-0.72), dominant (OR=0.58; 95% CI=0.38-0.88), and overdominant (OR=0.44; 95% CI=0.28-0.68) models. In contrast, the genotype C/C of rs16999593 correlated with a higher risk for TGA under a recessive model (OR=3.15; 95% CI=1.14-8.68) compared with the T/T and C/T genotypes. Furthermore, the TGC, TGT, CGC, and CGT haplotypes of DNMT1 did not differ significantly between the two groups, whereas the frequency of the TAC haplotype was lower in the case group (OR<1; P=0.002). No significant differences in the frequencies of the TC, CC, TT, and CT haplotypes of DNMT3A were found between the two groups. Furthermore, logistic regression showed that sex and the rs16999358 SNP were two independent risk factors for complete TGA. Overall, the C/T genotype of the rs16999593 SNP in DNMT1 might decrease the risk of complete TGA pathogenesis in the Southern Chinese population.
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Affiliation(s)
- Liming Lei
- Department of Cardiovascular Surgery of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Laboratory of South China Structural Heart Disease, Guangzhou 510080, China
| | - Haoming Lin
- Department of Biliary-Pancreatic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Shilong Zhong
- Medical Research Center of Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Zhiwei Zhang
- Department of Pediatrics of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Jimei Chen
- Department of Cardiovascular Surgery of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Laboratory of South China Structural Heart Disease, Guangzhou 510080, China
| | - Xiyong Yu
- Department of Biliary-Pancreatic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiaoqing Liu
- Department of Cardiovascular Surgery of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Laboratory of South China Structural Heart Disease, Guangzhou 510080, China
| | - Cheng Zhang
- Department of Pediatrics of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Zhiqiang Nie
- Department of Cardiovascular Surgery of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Laboratory of South China Structural Heart Disease, Guangzhou 510080, China
| | - Jian Zhuang
- Department of Cardiovascular Surgery of Guangdong Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Laboratory of South China Structural Heart Disease, Guangzhou 510080, China.
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Neves M, Ribeiro J, Medeiros R, Sousa H. Genetic polymorphism in DNMTs and gastric cancer: A systematic review and meta-analysis. Porto Biomed J 2016; 1:164-172. [PMID: 32258570 DOI: 10.1016/j.pbj.2016.10.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 10/24/2016] [Indexed: 02/07/2023] Open
Abstract
Highlights Single nucleotide polymorphisms (SNPs) in DNA methyltransferases (DNMTs) modulate protein expression and affect DNA methylation.Aberrant DNA methylation, have been associated with gastric carcinogenesis.DNMT2 rs11254413 is associated with protection for GC development.DNMT3A rs7560488, DNMT3A rs36012910 and, specially, DNMT1 rs16999593 are associated with increased susceptibility for GC development. Abstract Epigenetics alterations, including aberrant DNA methylation, have been associated with gastric carcinogenesis. Single nucleotide polymorphisms (SNPs) in DNA methyltransferases (DNMTs) may influence protein expression and therefore affect DNA regulation and susceptibility for Gastric Cancer (GC).We have performed a systematic review and meta-analysis involving 11 studies and a total of 24 SNPs in DNMTs were analyzed. According to literature, only 4 SNPs, DNMT1 rs16999593, DNMT2 rs11254413 and DNMT3A rs7560488 and DNMT3A rs36012910, were associated with GC. DNMT1 rs16999593 and DNMT3A rs7560488C allele and DNMT3A rs36012910 G allele showed an increased risk for GC. On the other hand, DNMT2 rs11254413 G allele presented a protective effect for GC. Additionally, the meta-analysis evaluated the SNPs analyzed in more than one study (n = 6). Results revealed that only DNMT1 rs16999593 had a statistically significant association with GC development (OR = 1.31; 95% CI = 1.08-1.60; p = 0.006 for TC + CC genotypes).Our study suggests that DNMT2 rs11254413, DNMT3A rs7560488, DNMT3A rs36012910 and, specially, DNMT1 rs16999593 may have an association with GC development. Nevertheless, further studies are need using different populations to clarify this association with GC risk.
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Affiliation(s)
- Marco Neves
- Molecular Oncology and Viral Pathology Group, Research Centre (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal.,Faculty of Medicine of University of Porto, Alameda Prof. Hernâni Monteiro, Porto, Portugal
| | - Joana Ribeiro
- Molecular Oncology and Viral Pathology Group, Research Centre (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal.,Faculty of Medicine of University of Porto, Alameda Prof. Hernâni Monteiro, Porto, Portugal.,Research Department, Portuguese League Against Cancer (LPCC-NRNorte), Porto, Portugal
| | - Rui Medeiros
- Molecular Oncology and Viral Pathology Group, Research Centre (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal.,Faculty of Medicine of University of Porto, Alameda Prof. Hernâni Monteiro, Porto, Portugal.,Research Department, Portuguese League Against Cancer (LPCC-NRNorte), Porto, Portugal.,Abel Salazar Institute for the Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal.,Virology Service, Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal
| | - Hugo Sousa
- Molecular Oncology and Viral Pathology Group, Research Centre (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal.,Faculty of Medicine of University of Porto, Alameda Prof. Hernâni Monteiro, Porto, Portugal.,Virology Service, Portuguese Oncology Institute of Porto (IPO-Porto), Porto, Portugal
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Li H, Li W, Liu S, Zong S, Wang W, Ren J, Li Q, Hou F, Shi Q. DNMT1, DNMT3A and DNMT3B Polymorphisms Associated With Gastric Cancer Risk: A Systematic Review and Meta-analysis. EBioMedicine 2016; 13:125-131. [PMID: 27789275 PMCID: PMC5264435 DOI: 10.1016/j.ebiom.2016.10.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 10/10/2016] [Accepted: 10/18/2016] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Increasing studies showed that abnormal changes in single nucleotide polymorphisms (SNPs) of DNMTs (DNMT1, DNMT3A and DNMT3B) were associated with occurrence or decrease of various tumors. However, the associations between DNMTs variations and gastric cancer (GC) risk were still conflicting. We aimed to assess the effect of DNMTs polymorphisms on the susceptibility to GC. METHODS Firstly, we did a meta-analysis for 7 SNPs (rs16999593, rs2228611, rs8101866 in DNMT1, rs1550117, rs13420827 in DNMT3A, rs1569686, rs2424913 in DNMT3B). Four genetic models (homozygote, heterozygote, dominant and recessive model) were used. Moreover, a meta-sensitivity and subgroup analysis was performed to clarify heterogeneity source. Lastly, 17 SNPs that couldn't be meta-analyzed were presented in a systematic review. FINDINGS 20 studies were included, 13 studies could be meta-analyzed and 7 ones could not. Firstly, a meta-analysis on 13 studies (3959 GC cases and 5992 controls) for 7 SNPs showed that GC risk increased in rs16999593 (heterozygote model: OR 1.36, 95%CI 1.14-1.61; dominant model: OR 1.36, 95%CI 1.15-1.60) and rs1550117 (homozygote model: OR 2.03, 95%CI 1.38-3.00; dominant model: OR 1.20, 95%CI 1.01-1.42; recessive model: OR 1.96, 95%CI 1.33-2.89) but decreased in rs1569686 (dominant model: OR 0.74, 95%CI 0.61-0.90). The remaining SNPs were not found associated with GC risk. Furthermore, the subgroup analysis indicated that for rs1550117 and rs1569686, the significant associations were particularly found in people from Chinese Jiangsu province (rs1550117, OR 1.77, 95%CI 1.25-2.51; rs1569686, OR 0.48, 95%CI 0.36-0.64) and that PCR-RFLP was a sensitive method to discover significant associations (rs1550117, OR 1.77, 95%CI 1.25-2.51; rs1569686, OR 0.49, 95%CI 0.37-0.65). Lastly, a systematic review on 7 studies for 17 SNPs suggested that rs36012910, rs7560488 and rs6087990 might have a potential effect on GC initiation. CONCLUSION This meta-analysis demonstrated that rs16999593 and rs1550117 could contribute to GC risk and that rs1569686 might be a protective factor against gastric carcinogenesis. By using these SNPs as biomarkers, it is feasible to estimate the risk of acquiring GC and thus formulate timely preventive strategy.
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Affiliation(s)
- Hongjia Li
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China
| | - Wen Li
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China
| | - Shanshan Liu
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China
| | - Shaoqi Zong
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China
| | - Weibing Wang
- Fudan University School of Public Health, Shanghai 200032, China
| | - Jianlin Ren
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Fenggang Hou
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China.
| | - Qi Shi
- Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China.
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Polymorphisms of the DNA Methyltransferase 1 Gene Predict Survival of Gastric Cancer Patients Receiving Tumorectomy. DISEASE MARKERS 2016; 2016:8578064. [PMID: 27087738 PMCID: PMC4819102 DOI: 10.1155/2016/8578064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/02/2016] [Accepted: 03/08/2016] [Indexed: 01/04/2023]
Abstract
DNA methyltransferase 1 (DNMT1) plays a pivotal role in maintaining DNA methylation status. Polymorphisms of DNMT1 may modify the role of DNMT1 in prognosis of gastric cancer (GC). Our aim was to test whether polymorphisms of DNMT1 gene were associated with overall survival of GC. Four hundred and forty-seven GC patients who underwent radical tumorectomy were enrolled in the study. Five tagging SNPs (rs10420321, rs16999593, rs2228612, rs2228611, and rs2288349) of the DNMT1 gene were genotyped by TaqMan assays. Kaplan-Meier survival plots and Cox proportional hazard regression were used to analyze the associations between SNPs of DNMT1 and survival of GC. Patients carrying rs2228611 GA/AA genotype tended to live longer than those bearing the GG genotype (HR 0.68, 95% CI: 0.51–0.91, P = 0.007). Further multivariate Cox regression analysis showed that rs2228611 was an independent prognostic factor (GA/AA versus GG: OR 0.67, 95% CI 0.49–0.91, P = 0.010). Nevertheless, other SNPs did not show any significant associations with survival of GC. Polymorphisms of the DNMT1 gene may affect overall survival of GC. The SNP rs2228611 has the potentiality to serve as an independent prognostic marker for GC patients.
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Gonçalves AC, Alves R, Baldeiras I, Cortesão E, Carda JP, Branco CC, Oliveiros B, Loureiro L, Pereira A, Nascimento Costa JM, Sarmento-Ribeiro AB, Mota-Vieira L. Genetic variants involved in oxidative stress, base excision repair, DNA methylation, and folate metabolism pathways influence myeloid neoplasias susceptibility and prognosis. Mol Carcinog 2016; 56:130-148. [PMID: 26950655 DOI: 10.1002/mc.22478] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 01/22/2016] [Accepted: 02/17/2016] [Indexed: 12/27/2022]
Abstract
Myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) share common features: elevated oxidative stress, DNA repair deficiency, and aberrant DNA methylation. We performed a hospital-based case-control study to evaluate the association in variants of genes involved in oxidative stress, folate metabolism, DNA repair, and DNA methylation with susceptibility and prognosis of these malignancies. To that end, 16 SNPs (one per gene: CAT, CYBA, DNMT1, DNMT3A, DNMT3B, GPX1, KEAP1, MPO, MTRR, NEIL1, NFE2F2, OGG1, SLC19A1, SOD1, SOD2, and XRCC1) were genotyped in 191 patients (101 MDS and 90 AML) and 261 controls. We also measured oxidative stress (reactive oxygen species/total antioxidant status ratio), DNA damage (8-hydroxy-2'-deoxyguanosine), and DNA methylation (5-methylcytosine) in 50 subjects (40 MDS and 10 controls). Results showed that five genes (GPX1, NEIL1, NFE2L2, OGG1, and SOD2) were associated with MDS, two (DNMT3B and SLC19A1) with AML, and two (CYBA and DNMT1) with both diseases. We observed a correlation of CYBA TT, GPX1 TT, and SOD2 CC genotypes with increased oxidative stress levels, as well as NEIL1 TT and OGG1 GG genotypes with higher DNA damage. The 5-methylcytosine levels were negatively associated with DNMT1 CC, DNMT3A CC, and MTRR AA genotypes, and positively with DNMT3B CC genotype. Furthermore, DNMT3A, MTRR, NEIL1, and OGG1 variants modulated AML transformation in MDS patients. Additionally, DNMT3A, OGG1, GPX1, and KEAP1 variants influenced survival of MDS and AML patients. Altogether, data suggest that genetic variability influence predisposition and prognosis of MDS and AML patients, as well AML transformation rate in MDS patients. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ana Cristina Gonçalves
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal.,Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), FMUC, Coimbra, Portugal.,Center for Neuroscience and Cell Biology and Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Coimbra, Portugal
| | - Raquel Alves
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal.,Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), FMUC, Coimbra, Portugal.,Center for Neuroscience and Cell Biology and Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Coimbra, Portugal
| | - Inês Baldeiras
- Center for Neuroscience and Cell Biology and Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Coimbra, Portugal.,Department of Neurology, Laboratory of Neurochemistry, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal
| | - Emília Cortesão
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal.,Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), FMUC, Coimbra, Portugal.,Clinical Hematology Department, Centro Hospitalar e Universitário de Coimbra, EPE (CHUC, EPE), Coimbra, Portugal
| | - José Pedro Carda
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal.,Clinical Hematology Department, Centro Hospitalar e Universitário de Coimbra, EPE (CHUC, EPE), Coimbra, Portugal
| | - Claudia C Branco
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPE, Ponta Delgada, São Miguel Island, Azores, Portugal.,Azores Genetics Research Group, Instituto Gulbenkian de Ciência, Oeiras, Portugal.,Faculty of Sciences, BioISI-Biosystems and Integrative Sciences Institute, University of Lisboa, Lisbon, Portugal
| | - Bárbara Oliveiros
- Laboratory for Biostatistics and Medical Informatics, FMUC, Coimbra, Portugal
| | - Luísa Loureiro
- Department of Medicine, Hospital Distrital da Figueira da Foz, EPE (HDFF, EPE), Figueira da Foz, Portugal
| | - Amélia Pereira
- Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), FMUC, Coimbra, Portugal.,Department of Medicine, Hospital Distrital da Figueira da Foz, EPE (HDFF, EPE), Figueira da Foz, Portugal
| | - José Manuel Nascimento Costa
- Department of Oncology, Centro Hospitalar e Universitário de Coimbra, EPE (CHUC, EPE), Coimbra, Portugal.,Faculty of Medicine, University Clinic of Oncology, University of Coimbra-FMUC, Coimbra, Portugal
| | - Ana Bela Sarmento-Ribeiro
- Laboratory of Oncobiology and Hematology (LOH) and University Clinic of Hematology, Faculty of Medicine, University of Coimbra-FMUC, Coimbra, Portugal.,Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), FMUC, Coimbra, Portugal.,Center for Neuroscience and Cell Biology and Institute for Biomedical Imaging and Life Sciences (CNC.IBILI), Coimbra, Portugal.,Clinical Hematology Department, Centro Hospitalar e Universitário de Coimbra, EPE (CHUC, EPE), Coimbra, Portugal
| | - Luisa Mota-Vieira
- Molecular Genetics and Pathology Unit, Hospital of Divino Espírito Santo of Ponta Delgada, EPE, Ponta Delgada, São Miguel Island, Azores, Portugal.,Azores Genetics Research Group, Instituto Gulbenkian de Ciência, Oeiras, Portugal.,Faculty of Sciences, BioISI-Biosystems and Integrative Sciences Institute, University of Lisboa, Lisbon, Portugal
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12
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Peng C, Deng Q, Li Z, Xiong C, Li C, Zheng F. Risk-Association of DNMT1 Gene Polymorphisms with Coronary Artery Disease in Chinese Han Population. Int J Mol Sci 2014; 15:22694-22705. [PMID: 25493477 PMCID: PMC4284731 DOI: 10.3390/ijms151222694] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 11/27/2014] [Accepted: 11/28/2014] [Indexed: 12/27/2022] Open
Abstract
Recently, a significant epigenetic component in the pathogenesis of Coronary Artery Disease (CAD) has been realized. Here, we evaluated the possible association of candidate Single Nucleotide Polymorphisms (SNPs) in the epigenetic-regulatory gene, DNA methyltransferase 1 (DNMT1), with CAD in Chinese Han population. Five tag SNPs (rs16999593, rs2336691, rs2228611, rs4804494, rs7253062) were analyzed by High Resolution Melt (HRM) method in 476 CAD patients and 478 controls. Overall, there were significant differences in the genotype and allele distributions of rs2228611 and rs2336691, between patients and controls. The minor A allele of rs2228611 was associated with a lower risk of CAD (p = 0.034); modest effect in the additive analysis but also marginal significance was found in the recessive model [ORadditive = 0.404 (0.184, 0.884), p = 0.023 and ORrecessive = 0.452 (0.213, 0.963), p = 0.040] after adjusting for confounders. While the rs2336691 A allele were associated with a higher risk of developing CAD (p = 0.037); borderline significant association in both additive and dominant models [ORadditive = 1.632 (1.030, 2.583), p = 0.037 and ORdominant = 1.599 (1.020, 2.507), p = 0.040]. In conclusion, these data provide the first evidence that occurrence of CAD may be moderated by genetic variation in the gene involved in the epigenetic machinery.
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Affiliation(s)
- Chunyan Peng
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Donghu Rd 169, Wuhan 430071, China.
| | - Qianyun Deng
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Donghu Rd 169, Wuhan 430071, China.
| | - Zuhua Li
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Donghu Rd 169, Wuhan 430071, China.
| | - Chenling Xiong
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Donghu Rd 169, Wuhan 430071, China.
| | - Cong Li
- Department of Molecular Pathology, International Agency for Research on Cancer, 150 Cours Albert Thomas, Lyon 69372, France.
| | - Fang Zheng
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Donghu Rd 169, Wuhan 430071, China.
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Li D, Bi FF, Cao JM, Cao C, Liu B, Yang Q. Regulation of DNA methyltransferase 1 transcription in BRCA1-mutated breast cancer: a novel crosstalk between E2F1 motif hypermethylation and loss of histone H3 lysine 9 acetylation. Mol Cancer 2014; 13:26. [PMID: 24502362 PMCID: PMC3936805 DOI: 10.1186/1476-4598-13-26] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 01/27/2014] [Indexed: 01/21/2023] Open
Abstract
Background DNA methyltransferase 1 (DNMT1) plays a critical role in breast cancer progression. However, the epigenetic mechanism regulating DNMT1 expression remains largely unknown. Methods Epigenetic regulation of DNMT1 was assessed in 85 invasive ductal carcinomas from BRCA1 mutation carriers. Association between clinicopathological features and DNMT1 promoter methylation was determined using Fisher’s exact test. Univariate analysis of survival was performed using the Kaplan-Meier method. Multivariate Cox regression analysis was performed to identify the independent prognostic factors for overall survival. Results Hypermethylated E2F transcription factor 1 (E2F1) motif is a key regulatory element for the DNMT1 gene in BRCA1-mutated breast cancer. Mechanistically, the abnormal E2F1 motif methylation-mediated loss of active histone H3 lysine 9 acetylation (H3K9ac) and transcription factor E2F1 enrichment synergistically inhibited the transcription of DNMT1. Clinicopathological data indicated that the hypermethylated E2F1 motif was associated with histological grade, lymph node, Ki67 and E-cadherin status; univariate survival and multivariate analyses demonstrated that lymph node metastasis was an independent and reliable prognostic factor for BRCA1-mutated breast cancer patients. Conclusions Our findings imply that genetic (such as BRCA1 mutation) and epigenetic mechanisms (such as DNA methylation, histone modification, transcription factor binding) are jointly involved in the malignant progression of DNMT1-related breast cancer.
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Affiliation(s)
- Da Li
- Department of Obstetrics and Gynecology, Shengjing Hospital, China Medical University, Shenyang 110004, China.
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14
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Mostowska A, Sajdak S, Pawlik P, Lianeri M, Jagodzinski PP. DNMT1, DNMT3A and DNMT3B gene variants in relation to ovarian cancer risk in the Polish population. Mol Biol Rep 2013; 40:4893-9. [PMID: 23666104 PMCID: PMC3723978 DOI: 10.1007/s11033-013-2589-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 04/29/2013] [Indexed: 12/24/2022]
Abstract
Studies have demonstrated that changes in DNA methylation of cancer related genes can be an elementary process accounting for ovarian tumorigenesis. Therefore, we evaluated the possible association of single nucleotide polymorphisms (SNPs) of DNA methyltransferases (DNMTs) genes, including DNMT1, DNMT3B, and DNMT3A, with ovarian cancer development in the Polish population. Using PCR-RFLP and HRM analyses, we studied the prevalence of the DNMT1 rs8101626, rs2228611 and rs759920, DNMT3A rs2289195, 7590760, rs13401241, rs749131 and rs1550117, and DNMT3B rs1569686, rs2424913 and rs2424932 SNPs in patients with ovarian cancer (n=159) and controls (n=180). The lowest p values of the trend test were observed for the DNMT1 rs2228611 and rs759920 SNPs in patients with ovarian cancer (p trend=0.0118 and p trend=0.0173, respectively). Moreover, we observed, in the recessive inheritance model, that the DNMT1 rs2228611 and rs759920 SNPs are associated with an increased risk of ovarian cancer development [OR 1.836 (1.143-2.949), p=0.0114, p corr=0.0342, and OR 1.932 (1.185-3.152), p=0.0078, p cor=0.0234, respectively]. However, none of other nine studied SNPs displayed significant contribution to the development of ovarian cancer. Furthermore, haplotype and multifactor dimensionality reduction analysis of the studied DNMT1, DNMT3B, and DNMT3A polymorphisms did not reveal either SNP combinations or gene interactions to be associated with the risk of ovarian cancer development. Our results may suggest that DNMT1 variants may be risk factors of ovarian cancer.
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Affiliation(s)
- Adrianna Mostowska
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, 6 Święcickiego Street, 60-781 Poznan, Poland
| | - Stefan Sajdak
- Clinic of Gynecological Surgery, Poznań University of Medical Sciences, Poznan, Poland
| | - Piotr Pawlik
- Clinic of Gynecological Surgery, Poznań University of Medical Sciences, Poznan, Poland
| | - Margarita Lianeri
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, 6 Święcickiego Street, 60-781 Poznan, Poland
| | - Paweł P. Jagodzinski
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, 6 Święcickiego Street, 60-781 Poznan, Poland
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15
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Kullmann K, Deryal M, Ong MF, Schmidt W, Mahlknecht U. DNMT1 genetic polymorphisms affect breast cancer risk in the central European Caucasian population. Clin Epigenetics 2013; 5:7. [PMID: 23638630 PMCID: PMC3646668 DOI: 10.1186/1868-7083-5-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 04/16/2013] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION DNA methylation of CpG islands within the promoter region of genes is an epigenetic modification with an important role in the development of cancer and it is typically mediated by DNA methyltransferases (DNMTs). In cancer cells, global hypomethylation of the genome as a whole and regional hypermethylation of CpG islands have been reported. Four groups of DNMTs have been identified: DNMT1, DNMT2 (TRDMT1), DNMT3A and DNMT3B. DNMT2 uses the catalytic mechanism of DNMTs, but does in fact methylate RNA. Little is known about the significance of these genes in human breast cancer. In the study presented herein, we analyzed five distinct DNMT single SNPs with regard to potential associations with breast cancer risk. CASE DESCRIPTION In this study, we genotyped 221 female Caucasian breast cancer patients and 221 female Caucasian healthy controls, and we used five allele-specific real-time polymerase chain reaction (qPCR) assays. We selected one locus within the DNMT1 gene and two loci within the DNMT3A and DNMT3B genes, respectively. Statistics were calculated using the chi-squared and Fisher's exact tests, and correlated with clinical parameters such as age, diagnosis, histology, TNM stage, hormonal receptor status, human epidermal growth factor receptor 2 (HER2) status, response to treatment and survival. Statistically significant results were obtained for correlations with the DNMT1 gene. DISCUSSION AND EVALUATION Five genomic loci within the DNMT1, DNMT3A and DNMT3B genes were assessed. Statistical significance (P = 0.030) was identified for DNMT1 SNP (A201G, rs2228612): six women within the control group were GG homozygous (variant), while this mutation was absent in the breast cancer group. CONCLUSIONS We conclude that women with the DNMT1 SNP (A201G, rs2228612) GG homozygous genotype (variant) have a lower risk of developing breast cancer compared to heterozygous or wildtype genotypes. To date, alterations within the DNMT1 gene have not been reported to be associated with cancer in the Caucasian population.
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Affiliation(s)
- Kathrin Kullmann
- Department of Internal Medicine, Division of Immunotherapy and Gene Therapy, José Carreras Research Center, Saarland University Medical Center, Homburg/Saar D-66421, Germany.
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16
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Arakawa Y, Watanabe M, Inoue N, Sarumaru M, Hidaka Y, Iwatani Y. Association of polymorphisms in DNMT1, DNMT3A, DNMT3B, MTHFR and MTRR genes with global DNA methylation levels and prognosis of autoimmune thyroid disease. Clin Exp Immunol 2012; 170:194-201. [PMID: 23039890 PMCID: PMC3482366 DOI: 10.1111/j.1365-2249.2012.04646.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2012] [Indexed: 12/20/2022] Open
Abstract
To clarify the association between factors regulating DNA methylation and the prognosis of autoimmune thyroid diseases (AITDs), we genotyped single nucleotide polymorphisms in genes encoding DNA methyltransferase 1 (DNMT1), DNMT3A, DNMT3B, methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR), which are enzymes essential for DNA methylation. Subjects for this study included 125 patients with Hashimoto's disease (HD), including 48 patients with severe HD and 49 patients with mild HD; 176 patients with Graves' disease (GD), including 79 patients with intractable GD and 47 patients with GD in remission; and 83 healthy volunteers (control subjects). The DNMT1+32204GG genotype was more frequent in patients with intractable GD than in patients with GD in remission. Genomic DNA showed significantly lower levels of global methylation in individuals with the DNMT1+32204GG genotype than in those with the AA genotype. The MTRR+66AA genotype was observed to be more frequent in patients with severe HD than in those with mild HD. The DNMT1+14395A/G, DNMT3B-579G/T, MTHFR+677C/T and +1298A/C polymorphisms were not correlated with the development or prognosis of AITD. Our study indicates that the DNMT1+32204GG genotype correlates with DNA hypomethylation and with the intractability of GD, and that the MTRR+66AA genotype may correlate with the severity of HD.
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Affiliation(s)
- Y Arakawa
- Department of Biomedical Informatics, Division of Health Sciences Department of Laboratory Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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Jiang J, Jia Z, Cao D, Jin MS, Kong F, Suo J, Cao X. Polymorphisms of the DNA methyltransferase 1 associated with reduced risks of Helicobacter pylori infection and increased risks of gastric atrophy. PLoS One 2012; 7:e46058. [PMID: 23049933 PMCID: PMC3457938 DOI: 10.1371/journal.pone.0046058] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 08/28/2012] [Indexed: 12/18/2022] Open
Abstract
INTRODUCTION DNA methyltransferase-1(DNMT1) is an important enzyme in determining genomic methylation patterns in mammalian cells. We investigated the associations between SNPs in the DNMT1 gene and risks of developing H. pylori seropositivity, gastric atrophy and gastric cancer in the Chinese population. METHODS The study consisted of 447 patients with gastric cancer; 111 patients with gastric atrophy; and 961 healthy controls. Five SNPs, rs10420321, rs16999593, rs8101866, rs8111085 and rs2288349 of the DNMT1 gene were genotyped. Anti-H.pylori IgG was detected by ELISA. Gastric atrophy was screened by the level of serum pepsinogen Ι and II and then confirmed by endoscopy and histopatholgical examinations. RESULTS The age- and sex-adjusted OR of H. pylori seropositivity was 0.67 (95%CI: 0.51-0.87) for rs8111085 TC/CC genotypes, significantly lower than the TT genotype in healthy controls. The adjusted OR of H.pylori seropositivity was 0.68 (95%CI: 0.52-0.89) for rs10420321 AG/GG genotypes. In addition, patients carrying rs2228349 AA genotype have a significantly increased risk for H.pylori seropositivity (OR=1.67; 95%CI: 1.02-2.75). Further haplotype analyses also showed that the ATTTG and ATCTA are significantly associated with increased risks in H.pylori infection compared to the GTCCG haplotype (OR=1.38, 95%CI: 1.08-1.77; OR=1.40, 95% CI: 1.09-1.80). The adjusted ORs of gastric atrophy were 1.66 (95%CI: 1.06-2.61) for rs10420321 GG genotype, and 1.67 (95%CI 1.06-2.63, P=0.03) for rs8111085 CC genotype, but no association was found between SNPs in the DNMT1 gene and risk of developing gastric cancer. CONCLUSIONS Individuals with rs10420321 GG and rs8111085 CC genotype of the DNMT1 gene were associated with reduced risks for H.pylori infection. On the other hand, higher risks of gastric atrophy were found in the carriers with these two genotypes compared to other genotypes. Our results suggested that SNPs of DNMT1 could be used as genotypic markers for predicting genetic susceptibilities to H.pylori infection and risks in gastric atrophy.
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Affiliation(s)
- Jing Jiang
- Division of Clinical Epidemiology, Jilin University First Hospital, Changchun, China
| | - Zhifang Jia
- Division of Clinical Epidemiology, Jilin University First Hospital, Changchun, China
| | - Donghui Cao
- Division of Clinical Epidemiology, Jilin University First Hospital, Changchun, China
| | - Mei-Shan Jin
- Division of Pathology, Jilin University First Hospital, Changchun, China
| | - Fei Kong
- Division of Clinical Epidemiology, Jilin University First Hospital, Changchun, China
| | - Jian Suo
- Department of Gastric and Colorectal Surgery, Jilin University First Hospital, Changchun, China
| | - Xueyuan Cao
- Department of Gastric and Colorectal Surgery, Jilin University First Hospital, Changchun, China
- * E-mail:
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18
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Yang XX, He XQ, Li FX, Wu YS, Gao Y, Li M. Risk-association of DNA methyltransferases polymorphisms with gastric cancer in the Southern Chinese population. Int J Mol Sci 2012; 13:8364-8378. [PMID: 22942708 PMCID: PMC3430239 DOI: 10.3390/ijms13078364] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2012] [Revised: 06/20/2012] [Accepted: 06/27/2012] [Indexed: 01/10/2023] Open
Abstract
DNA hypomethylation and/or hypermethylation are presumed to be early events in carcinogenesis, and one or more DNA methyltransferases (DNMTs) have been suggested to play roles in carcinogenesis of gastric cancer (GC). However, there have been no systematic studies regarding the association between DNMT gene polymorphisms and GC risk. Here, we examined the associations of 16 single nucleotide polymorphisms (SNPs) from DNMT1 (rs2114724, rs2228611, rs2228612, rs8101866, rs16999593), DNMT2 (rs11695471, rs11254413), DNMT3A (rs1550117, rs11887120, rs13420827, rs13428812, rs6733301), DNMT3B (rs2424908, rs2424913, rs6087990) and DNMT3L (rs113593938) with GC in the Southern Chinese population. We assessed the associations of these 16 SNPs with GC in a case-control study that consisted of 242 GC cases and 294 controls, using the Sequenom MALDI-TOF-MS platform. Association analyses based on the χ2 test and binary logistic regression were performed to determine the odds ratio (OR) and 95% confidence interval (95%CI) for each SNP. We found that rs16999593 in DNMT1, rs11254413 in DNMT2 and rs13420827 in DNMT3A were significantly associated with GC susceptibility (OR 1.45, 0.15, 0.66, respectively; 95% CI 1.00–2.11, p = 0.047; 0.08–0.27, p < 0.01; 0.45–0.97, p = 0.034, respectively, overdominant model). These results suggested that DNMT1, DNMT2 and DNMT3A may play important roles in GC carcinogenesis. However, further studies are required to elucidate the mechanism.
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Affiliation(s)
- Xue-Xi Yang
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China; E-Mails: (X.-X.Y.); (F.-X.L.); (Y.-S.W.); (Y.G.)
| | - Xuan-Qiu He
- The First Clinical College, Southern Medical University, Guangzhou 510515, China; E-Mail:
| | - Fen-Xia Li
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China; E-Mails: (X.-X.Y.); (F.-X.L.); (Y.-S.W.); (Y.G.)
| | - Ying-Song Wu
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China; E-Mails: (X.-X.Y.); (F.-X.L.); (Y.-S.W.); (Y.G.)
| | - Yang Gao
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China; E-Mails: (X.-X.Y.); (F.-X.L.); (Y.-S.W.); (Y.G.)
| | - Ming Li
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China; E-Mails: (X.-X.Y.); (F.-X.L.); (Y.-S.W.); (Y.G.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-20-61648550; Fax: +86-20-61648554
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Van De Voorde L, Speeckaert R, Van Gestel D, Bracke M, De Neve W, Delanghe J, Speeckaert M. DNA methylation-based biomarkers in serum of patients with breast cancer. Mutat Res 2012; 751:304-325. [PMID: 22698615 DOI: 10.1016/j.mrrev.2012.06.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 06/03/2012] [Accepted: 06/05/2012] [Indexed: 12/18/2022]
Abstract
Alterations of genetic and epigenetic features can provide important insights into the natural history of breast cancer. Although DNA methylation analysis is a rapidly developing field, a reproducible epigenetic blood-based assay for diagnosis and follow-up of breast cancer has yet to be successfully developed into a routine clinical test. The aim of this study was to review multiple serum DNA methylation assays and to highlight the value of those novel biomarkers in diagnosis, prognosis and prediction of therapeutic outcome. Serum is readily accessible for molecular diagnosis in all individuals from a peripheral blood sample. The list of hypermethylated genes in breast cancer is heterogeneous and no single gene is methylated in all breast cancer types. There is increasing evidence that a panel of epigenetic markers is essential to achieve a higher sensitivity and specificity in breast cancer detection. However, the reported percentages of methylation are highly variable, which can be partly explained by the different sensitivities and the different intra-/inter-assay coefficients of variability of the analysis methods. Moreover, there is a striking lack of receiver operating characteristic (ROC) curves of the proposed biomarkers. Another point of criticism is the fact that 'normal' patterns of DNA methylation of some tumor suppressor and other cancer-related genes are influenced by several factors and are often poorly characterized. A relatively frequent methylation of those genes has been observed in high-risk asymptomatic women. Finally, there is a call for larger prospective cohort studies to determine methylation patterns during treatment and follow-up. Identification of patterns specific for a differential response to therapeutic interventions should be useful. Only in this way, it will be possible to evaluate the predictive and prognostic characteristics of those novel promising biomarkers.
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Affiliation(s)
- Lien Van De Voorde
- Department of Radiation Oncology and Experimental Cancer Research, Ghent University Hospital, Ghent, Belgium
| | | | - Dirk Van Gestel
- Department of Radiation Oncology, Antwerp University Hospital, Antwerp, Belgium
| | - Marc Bracke
- Department of Radiation Oncology and Experimental Cancer Research, Ghent University Hospital, Ghent, Belgium
| | - Wilfried De Neve
- Department of Radiation Oncology and Experimental Cancer Research, Ghent University Hospital, Ghent, Belgium
| | - Joris Delanghe
- Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium
| | - Marijn Speeckaert
- Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium; Department of Internal Medicine, Ghent University Hospital, Ghent, Belgium.
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