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Singh S, Gupta A, Singh N, Sengupta PS, Panda SK, Sharma S. Genotyping, in silico screening and molecular dynamics simulation of SNPs of MGMT and ERCC1 gene in lung cancer patients treated with platinum-based doublet chemotherapy. J Biomol Struct Dyn 2023:1-20. [PMID: 37771161 DOI: 10.1080/07391102.2023.2261052] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 09/02/2023] [Indexed: 09/30/2023]
Abstract
Lung cancer, the leading cause of death worldwide, arises from an intricate combination of genetic and environmental factors. Genetic variations can influence the chemotherapeutic response of lung cancer patients in DNA repair genes. This study examines the response to platinum-based drugs among lung cancer patients of North Indian descent who possess genetic variations in the MGMT and ERCC1 genes. P CR-RFLP method was used for genotypic analysis. MedCalc statistical software was used to calculate odds ratios and Median Survival Time (MST). GROMACS software was used to perform Molecular dynamic simulation. ADCC Patients revealed a significant association with MGMT in the heterozygous genotype (HR= 1.56, p=0.02) and also with ERCC1 in both mutant and combined variants (HR= 1.25, p=0.01; HR=0.78, p=0.03). SQCC subjects harbouring ERCC1 polymorphism also reported a 2-fold increase in hazard ratio and a corresponding decrease in survival time for heterozygous and combined variants (HR= 2.55, p=0.02; HR 2.33, p=0.01, respectively). MD simulation results demonstrate a lower RMSD, stable radius of gyration, and lower RMSF, indicating the mutated MGMT protein is more stable than the wild. Further, the docking score for DNA-Wild and DNA-L84F mutants are -201.6 and -131.8, respectively. MD Simulation of the complexes further validated the results. Our study concludes that MGMT and ERCC1 polymorphisms are associated with decreased overall survival. Further, computational analysis of MGMT (rs12917) polymorphism revealed that mutated MGMT cannot bind properly to the DNA and hence cannot properly repair DNA, resulting in lower overall survival.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sidhartha Singh
- Department of Biosciences and Bioengineering, DY Patil International University, Akurdi, Maharashtra, India
| | - Anu Gupta
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, Punjab, India
| | - Navneet Singh
- Department of Pulmonary Medicine, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India
| | - Parth Sarthi Sengupta
- Department of Biosciences and Bioengineering, DY Patil International University, Akurdi, Maharashtra, India
| | - Saroj Kumar Panda
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Berhampur, India
| | - Siddharth Sharma
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, Punjab, India
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Sánchez-Siles M, Pelegrín-Hernández JP, Hellin-Meseguer D, Guerrero-Sánchez Y, Corno-Caparrós A, Cabezas-Herrera J, Pastor-Quirante F, Fernández-Ruiz JA, Aliaga-Sánchez A, Lucero-Berdugo M, Camacho-Alonso F. Genotype of Null Polymorphisms in Genes GSTM1, GSTT1, CYP1A1, and CYP1A1*2A (rs4646903 T>C)/CYP1A1*2C (rs1048943 A>G) in Patients with Larynx Cancer in Southeast Spain. Cancers (Basel) 2020; 12:cancers12092478. [PMID: 32882964 PMCID: PMC7563952 DOI: 10.3390/cancers12092478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/19/2020] [Accepted: 08/27/2020] [Indexed: 01/08/2023] Open
Abstract
Simple Summary Epidemiological studies have shown that individual susceptibility to cancer is mediated by genetic and environmental factors. The aim of the present study is to evaluate the individuals’ metabolic genetic susceptibility to toxic habits (smoking and alcohol consumption) by detecting polymorphisms CYP1A1 rs1048943 T>C and CYPA1A2 rs4646903 A>G, and null polymorphisms in GSTM1 and GSTT1 genotypes, comparing a group of healthy control subjects with a population of larynx cancer patients from southeastern Spain. As results patients with larynx cancer present more gene GSTM1 and GSTT1 null polymorphisms, and CYP1A1 rs4646903 T>C polymorphisms. Abstract Background: some types of cancer have been associated with the presence of single nucleotide polymorphisms (SNPs) of some genes that encode enzymes: glutathione-S transferase (GST), whose alteration leads to loss of function and a lower capacity to eliminate toxic GSTM1 and GSTT1 null genotypes; SNPs causing loss of function of CYP1A1 or CYP1A1–2 cytochrome P450 enzymes related with a lower capacity to deactivate hydrocarbons related to smoking, which involves a higher risk of developing some smoking-dependent cancers including larynx cancer. Objective: to compare the presence of null SNPs in genes GSTM1, GSTT1, and CYP1A1 rs 4646903 T>C, and CYP1A1–2 RS1048943 A>G in patients with hypopharyngeal and larynx cancer with a healthy control group. Materials and method: The study included a total of 80 patients with hypopharyngeal and laryngeal cancer and 23 healthy subjects. Genomic DNA was obtained from saliva samples, determining genotype GSTM1 (present +, or null −), GSTT1 (present + or null −). Polymorphisms (SNP) in CYP1A1 T>C (present + CC, or absent − TC/TT), and CYP1A1–2 A>G (present + GG, or absent − AG/AA). Results: the mean age of patients with larynx cancer was 62 years and of control subjects 63 years. Of the total sample, over 95% were men, and over 90% were smokers. The presence of null genotypes for GTM1 was 50% in patients with larynx cancer (p = 0.042), while GSTT1 was 88.75% (p = 0.002). CYP1A1 rs4646903 T>C polymorphisms were detected in 100% of cases of larynx cancer and 17.39% of healthy subjects (p > 0.001). Conclusions: patients with larynx cancer present more gene GSTM1 and GSTT1 null polymorphisms, and CYP1A1 rs4646903 T>C polymorphisms.
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Affiliation(s)
| | | | - Diego Hellin-Meseguer
- Otorhinolaryngology, University Hospital Virgen de la Arrixaca, 30005 Murcia, Spain; (J.P.P.-H.); (D.H.-M.)
| | - Yolanda Guerrero-Sánchez
- Department of Human Anatomy and Psychobiology, University of Murcia, 30100 Murcia, Spain
- Correspondence:
| | | | - Juan Cabezas-Herrera
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, IMIB, 30005 Murcia, Spain;
| | | | | | | | - Mayra Lucero-Berdugo
- Department of Oral Medicine, Catholic University of Murcia, 30107 Murcia, Spain;
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Martínez-Ramírez OC, Pérez-Morales R, Castro-Hernández C, Gonsebatt ME, Casas-Ávila L, Valdés-Flores M, Petrosyan P, de León-Suárez VP, Rubio J. Association of the Promoter Methylation and the rs12917 Polymorphism of MGMT with Formation of DNA Bulky Adducts and the Risk of Lung Cancer in Mexican Mestizo Population. DNA Cell Biol 2019; 38:307-313. [DOI: 10.1089/dna.2018.4526] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
| | - Rebeca Pérez-Morales
- Departamento de Biología Molecular, Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango, Durango, Mexico
| | - Clementina Castro-Hernández
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Maria Eugenia Gonsebatt
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Leonora Casas-Ávila
- Departamento de Genética, Instituto Nacional de Rehabilitación, Ciudad de México, Mexico
| | | | - Pavel Petrosyan
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | | | - Julieta Rubio
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
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A computational model to predict the structural and functional consequences of missense mutations in O6-methylguanine DNA methyltransferase. DNA Repair (Amst) 2019; 115:351-369. [DOI: 10.1016/bs.apcsb.2018.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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The potential role of MGMT rs12917 polymorphism in cancer risk: an updated pooling analysis with 21010 cases and 34018 controls. Biosci Rep 2018; 38:BSR20180942. [PMID: 30232235 PMCID: PMC6435461 DOI: 10.1042/bsr20180942] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 09/12/2018] [Accepted: 09/14/2018] [Indexed: 02/06/2023] Open
Abstract
In the present study, we aimed at determining the potential role of rs12917 polymorphism of the O-6-methylguanine-DNA methyltransferase (MGMT) gene in the occurrence of cancer. Based on the available data from the online database, we performed an updated meta-analysis. We retrieved 537 articles from our database research and finally selected a total of 54 case–control studies (21010 cases and 34018 controls) for a series of pooling analyses. We observed an enhanced risk in cancer cases compared with controls, using the genetic models T/T compared with C/C (P-value of association test <0.001; odds ratio (OR) = 1.29) and T/T compared with C/C+C/T (P<0.001; OR = 1.32). We detected similar positive results in the subgroups ‘Caucasian’, and ‘glioma’ (all P<0.05; OR > 1). However, we detected negative results in our analyses of most of the other subgroups (P>0.05). Begg’s and Egger’s tests indicated that the results were free of potential publication bias, and sensitivity analysis suggested the stability of the pooling results. In summary, the T/T genotype of MGMT rs12917 is likely to be linked to an enhanced susceptibility to cancer overall, especially glioma, in the Caucasian population.
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Kycler W, Korski K, Loziński C, Teresiak-Mańczak A, Przybyła A, Mackiewicz A, Cybulski Z, Lamperska K. The anti-cancer actions of O6-methylguanine-DNA-methyltransferase in relation to colon polyps. Pharmacol Rep 2014; 66:1060-4. [PMID: 25443735 DOI: 10.1016/j.pharep.2014.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 05/05/2014] [Accepted: 06/25/2014] [Indexed: 11/18/2022]
Abstract
BACKGROUND Genetic variability in DNA repair genes may contribute to differences in DNA repair capacity and susceptibility to colon polyps and cancer. In this study, we examined the role of MGMT polymorphisms in colon polyps formation. METHODS PCR-SSCP analysis was performed included 254 patients with colon polyps and 330 controls. RESULTS The homozygous F84F genotype was significantly more prevalent in study group than in controls. The polymorphic allele 84F was more frequent appeared in group of older patients and in group of smoking patients. On the other hand, there were no association between 84F and gender, size of polyps, cancer family history. CONCLUSIONS We concluded that high frequency of 84F allele in the group of patients may suggest the role of the MGMT variant in colon polyps etiology.
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Affiliation(s)
- Witold Kycler
- Department of Oncological Surgery II, Greater Poland Cancer Centre, Poznań, Poland.
| | - Konstanty Korski
- Department of Pathology, Greater Poland Cancer Centre, Poznań, Poland
| | - Cezary Loziński
- Department of Oncological Surgery II, Greater Poland Cancer Centre, Poznań, Poland
| | | | | | - Andrzej Mackiewicz
- University of Medical Sciences, Poznań, Poland; Department of Cancer Diagnostics and Immunology, Greater Poland Cancer Centre, Poznań, Poland
| | - Zefiryn Cybulski
- Microbiology Laboratory, Greater Poland Cancer Centre, Poznań, Poland
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Nagy E, Gajjar KB, Patel II, Taylor S, Martin-Hirsch PL, Stringfellow HF, Martin FL, Phillips DH. MGMT promoter hypermethylation and K-RAS, PTEN and TP53 mutations in tamoxifen-exposed and non-exposed endometrial cancer cases. Br J Cancer 2014; 110:2874-80. [PMID: 24853176 PMCID: PMC4056065 DOI: 10.1038/bjc.2014.263] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 04/23/2014] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Tamoxifen has anti-oestrogenic and anti-tumour activity in the breast, but is oestrogenic and carcinogenic in the endometrium. It can induce experimental tumours by both hormonal and DNA-damaging mechanisms, but its carcinogenic mode of action in human endometrium remains unclear. METHODS We investigated whether an epigenetic mechanism, involving promoter hypermethylation of the gene for the DNA repair enzyme MGMT (O6-methylguanine DNA methyltransferase), was associated with K-RAS, TP53 and PTEN mutations in endometrial tumours from women treated with tamoxifen (TAM, n=30) or unexposed to the drug (EC, n=38). RESULTS There were significant (P<0.05) differences in tumour grade between the TAM and EC groups, with more favourable morphology in the latter. K-RAS mutations, predominantly G>A, occurred in small numbers in both groups. TP53 mutations were of mainly A>G, C>T and indel modifications in both groups, but more frequent in TAM cases. PTEN mutations dominated in EC tumours and were of the type that has large impact on protein function, such as indel or nonsense mutations. These observations alongside the mutational spectrum in PTEN suggest that the malignancies arise from different backgrounds, hence pointing to an effect of tamoxifen. Both groups displayed MGMT promoter hypermethylation. This coincided with mutations more frequently in the TAM (78%) than in the EC (50%) group, even though there were significantly (P<0.05) fewer mutations and methylations in TAM cases. CONCLUSIONS Although the difference in coincidence did not reach significance with the current sample size, the findings suggest that epigenetic processes may play a role in the way tamoxifen induces endometrial cancer.
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Affiliation(s)
- E Nagy
- Analytical and Environmental Sciences Division, King's College London, London SE1 9NH, UK
| | - K B Gajjar
- Centre for Biophotonics, Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - I I Patel
- Cavendish Laboratories, JJ Thomson Avenue, University of Cambridge, Cambridge CB3 0HE, UK
| | - S Taylor
- Liverpool Women's Hospital NHS Foundation Trust, Department of Gynaecology, Crown Street, Liverpool, Merseyside L8 7SS, UK
| | - P L Martin-Hirsch
- Centre for Biophotonics, Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
- Lancashire Teaching Hospitals NHS Trust, Royal Preston Hospital, Sharoe Green Lane North, Preston, Lancashire PR2 9HT, UK
| | - H F Stringfellow
- Lancashire Teaching Hospitals NHS Trust, Royal Preston Hospital, Sharoe Green Lane North, Preston, Lancashire PR2 9HT, UK
| | - F L Martin
- Centre for Biophotonics, Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - D H Phillips
- Analytical and Environmental Sciences Division, King's College London, London SE1 9NH, UK
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8
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GSTM1 null polymorphisms is associated with laryngeal cancer risk: a meta-analysis. Tumour Biol 2014; 35:6303-9. [DOI: 10.1007/s13277-014-1828-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/05/2014] [Indexed: 11/26/2022] Open
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Adel Fahmideh M, Schwartzbaum J, Frumento P, Feychting M. Association between DNA repair gene polymorphisms and risk of glioma: a systematic review and meta-analysis. Neuro Oncol 2014; 16:807-14. [PMID: 24500421 DOI: 10.1093/neuonc/nou003] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Association studies of germline DNA repair single nucleotide polymorphisms (SNPs) and glioma risk have yielded inconclusive results. We therefore performed a systematic review and meta-analysis of studies investigating this association. METHODS We identified 27 eligible studies investigating 105 SNPs in 42 DNA repair genes. Of these, 10 SNPs in 7 genes were analyzed in at least 4 studies and were therefore included in our meta-analysis. The meta-analysis was performed for homozygote comparison, heterozygote comparison, and dominant and recessive models by applying a fixed- or random-effects model. The funnel and forest plots were created using RevMan software. RESULTS We found that SNPs rs3212986 (odds ratio [OR] = 1.35 (1.08-1.68), P = .008), rs13181 (OR = 1.18 (1.06-1.31), P = .002), and rs25487 (OR = 1.12 (1.03-1.22), P = .007) in DNA repair genes ERCC1, ERCC2 (XPD), and XRCC1 may increase the risk of glioma, while polymorphisms rs1136410 (OR = 0.78 (0.68-0.89), P = .0004) and rs12917 (OR = 0.84 (0.73-0.96), P = .01) in PARP1(ADPRT) and MGMT are associated with decreased susceptibility to glioma. No evidence of significant associations between ERCC2 rs1799793, OGG1 rs1052133, XRCC1 rs25489, XRCC1 rs1799782, or XRCC3 rs861539 and risk of glioma was observed. CONCLUSION This study provides evidence that DNA repair genes ERCC1, ERCC2, and XRCC1 might be low-penetrance glioma-risk genes, while MGMT and PARP1 polymorphisms may confer protection against glioma.
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Affiliation(s)
- Maral Adel Fahmideh
- Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (M.A.F., M.F.); Division of Epidemiology, College of Public Health, The Ohio State University, Columbus, Ohio (J.S.); Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (P.F.)
| | - Judith Schwartzbaum
- Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (M.A.F., M.F.); Division of Epidemiology, College of Public Health, The Ohio State University, Columbus, Ohio (J.S.); Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (P.F.)
| | - Paolo Frumento
- Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (M.A.F., M.F.); Division of Epidemiology, College of Public Health, The Ohio State University, Columbus, Ohio (J.S.); Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (P.F.)
| | - Maria Feychting
- Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (M.A.F., M.F.); Division of Epidemiology, College of Public Health, The Ohio State University, Columbus, Ohio (J.S.); Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden (P.F.)
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Qiu ZX, Xue F, Shi XF, He X, Ma HN, Chen L, Chen PZ. MGMT Leu84Phe gene polymorphism and lung cancer risk: a meta-analysis. Tumour Biol 2014; 35:4381-7. [DOI: 10.1007/s13277-013-1576-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 12/17/2013] [Indexed: 01/20/2023] Open
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Liu J, Zhang R, Chen F, Yu C, Sun Y, Jia C, Zhang L, Salahuddin T, Li X, Lang J, Song X. MGMT Leu84Phe polymorphism contributes to cancer susceptibility: evidence from 44 case-control studies. PLoS One 2013; 8:e75367. [PMID: 24086516 PMCID: PMC3784571 DOI: 10.1371/journal.pone.0075367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 08/13/2013] [Indexed: 02/05/2023] Open
Abstract
Background O6-methylguanine-DNA methyltransferase is one of the few proteins to directly remove alkylating agents in the human DNA direct reversal repair pathway. A large number of case-control studies have been conducted to explore the association between MGMT Leu84Phe polymorphism and cancer risk. However, the results were not consistent. Methods We carried out a meta-analysis of 44 case-control studies to clarify the association between the Leu84Phe polymorphism and cancer risk. Results Overall, significant association of the T allele with cancer susceptibility was verified with meta-analysis under a recessive genetic model (P<0.001, OR=1.30, 95%CI 1.24-1.50) and TT versus CC comparison (P=0.001, OR=1.29, 95% CI 1.12-1.50). In subgroup analysis, a significant increased risk was found for lung cancer (TT versus CC, P=0.027, OR=1.67, 95% CI 1.06-2.63; recessive genetic model, P=0.32, OR=1.64, 95% CI 1.04-2.58), whereas risk of colorectal cancer was significantly low under a dominant genetic model (P=0.019, OR=0.84, 95% CI 0.72-0.97). Additionally, a significant association between TT genetic model and total cancer risk was found in the Caucasian population (TT versus CC, P=0.014, OR=1.29, 95% CI 1.05-1.59; recessive genetic model, P=0.009, OR=1.31, 95% CI 1.07-1.61), but not in the Asian population. An increased risk for lung cancer was also verified in the Caucasian population (TT versus CC, P=0.035, OR=1.62, 95% CI 1.04-2.53; recessive genetic model, P=0.048, OR=1.57, 95% CI 1.01-2.45). Conclusions These results suggest that MGMT Leu84Phe polymorphism might contribute to the susceptibility of certain cancers.
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Affiliation(s)
- Jun Liu
- Department of Otolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Renxia Zhang
- Department of Anesthesia, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
| | - Fei Chen
- Department of Otolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Cuicui Yu
- Department of Anesthesia, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
| | - Yan Sun
- Department of Otolaryngology Head and Neck Surgery, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
| | - Chuanliang Jia
- Department of Otolaryngology Head and Neck Surgery, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
- Binzhou Medical School, Yantai, Shandong, China
| | - Lijing Zhang
- Department of Otolaryngology Head and Neck Surgery, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
- Qingdao Medical School, Qingdao, Shandong, China
| | - Taufiq Salahuddin
- Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Xiaodong Li
- The 3People’s Hospital of Jinan, Jinan, Shandong, China
| | - Juntian Lang
- Department of Otolaryngology Head and Neck Surgery, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
- * E-mail: (XS); (J. Lang)
| | - Xicheng Song
- Department of Otolaryngology Head and Neck Surgery, Yuhuangding Hospital, Medical School of Qingdao University, Yantai, Shandong, China
- * E-mail: (XS); (J. Lang)
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Du L, Wang H, Xiong T, Ma Y, Yang J, Huang J, Zeng D, Wang X, Huang H, Huang J. The polymorphisms in the MGMT gene and the risk of cancer: a meta-analysis. Tumour Biol 2013; 34:3227-37. [PMID: 23760981 DOI: 10.1007/s13277-013-0893-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 05/27/2013] [Indexed: 02/05/2023] Open
Abstract
Polymorphisms in the MGMT gene have been implicated in susceptibility to cancer, but the published studies have reported inconclusive results. The objective of the current study was to investigate the genetic risk of polymorphisms in the MGMT gene for cancer. A meta-analysis was carried out to analyze the association between polymorphisms in the MGMT gene and cancer risk. Five polymorphisms (Leu84Phe, Leu53Leu, Ile143Val, Lys178Arg, and -485C/A) with 98 case-control studies from 49 articles were analyzed. The results indicated that individuals who carried the Phe/Phe homozygote genotype of Leu84Phe had a 31 % increased risk of cancer compared with the Leu allele (Leu + Leu/Phe) carriers (odds ratio [OR] = 1.32, 95 % confidence interval [CI] = 1.15-1.52, P < 0.0001 for Phe/Phe vs. Phe/Leu + Leu/Leu). However, there was no significant association between the risk of cancer and the other four polymorphisms (Leu53Leu, Ile143Val, Lys178Arg, and -485C/A). In further stratified analyses for the Leu84Phe and Ile143Val polymorphisms, the increased risk of cancer remained in subgroups of Caucasians, patients with esophageal cancer for the Leu84Phe polymorphism, and patients with lung cancer for the Ile143Val polymorphism. Results from the current meta-analysis suggested that Leu84Phe and Ile143Val in the MGMT gene are risk factors for cancer. In the future, more studies should be performed to validate our results.
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Affiliation(s)
- Liang Du
- West China Medical School/West China Hospital, Sichuan University, Guoxuexiang 37, Chengdu, Sichuan, 610041, China
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Christmann M, Kaina B. O(6)-methylguanine-DNA methyltransferase (MGMT): impact on cancer risk in response to tobacco smoke. Mutat Res 2012; 736:64-74. [PMID: 21708177 DOI: 10.1016/j.mrfmmm.2011.06.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 05/23/2011] [Accepted: 06/08/2011] [Indexed: 05/31/2023]
Abstract
Tobacco, smoked, snuffed and chewed, contains powerful mutagens and carcinogens. At least three of them, N-dimethylnitrosamine, N'-nitrosonornicotine and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, attack DNA at the O(6)-position of guanine. The resulting O(6)-alkylguanine adducts are repaired by the suicide enzyme O(6)-methylguanine-DNA methyltransferase (MGMT), which is known to protect against the mutagenic, genotoxic and carcinogenic effects of monofunctional alkylating agents. While in rat liver MGMT was shown to be subject to regulation by genotoxic stress leading to adaptive changes in its activity, in humans evidence of adaptive modulation of MGMT levels is still lacking. Several polymorphisms are known, which are suspected to impact on the risk of developing cancer. In this review we focus on three questions: (a) Has tobacco consumption by smoking or chewing an impact on MGMT expression and MGMT promoter methylation in normal and tumor tissue? (b) Is there an association between MGMT polymorphisms and cancer risk and is this risk related to smoking? (c) Does MGMT protect against tobacco-associated cancer? There are several lines of evidence for an increase of MGMT activity in the normal tissue of smokers compared to non-smokers. Furthermore, in tumors developed in smokers a tendency towards an increase of MGMT expression was found. The data points to the possibility that agents in tobacco smoke are able to trigger upregulation of MGMT in normal and tumor tissue. For MGMT promoter methylation data is conflicting. There is some evidence for an association between MGMT polymorphisms and smoking-induced cancer risk. The key question whether or not MGMT protects against tobacco smoke-induced cancer is difficult to answer since prospective studies on smokers versus non-smokers are lacking and appropriate animal studies with MGMT transgenic mice exposed to the complex mixture of tobacco smoke have not been performed, which indicates the need for further explorations.
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Affiliation(s)
- Markus Christmann
- Institute of Toxicology, University Medical Center Mainz, Mainz, Germany.
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O'Mara TA, Ferguson K, Fahey P, Marquart L, Yang HP, Lissowska J, Chanock S, Garcia-Closas M, Thompson DJ, Healey CS, Dunning AM, Easton DF, Webb PM, Spurdle AB. CHEK2, MGMT, SULT1E1 and SULT1A1 polymorphisms and endometrial cancer risk. Twin Res Hum Genet 2011; 14:328-32. [PMID: 21787115 DOI: 10.1375/twin.14.4.328] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Several single nucleotide polymorphisms (SNPs) in candidate genes of DNA repair and hormone pathways have been reported to be associated with endometrial cancer risk. We sought to confirm these associations in two endometrial cancer case-control sample sets and used additional data from an existing genome-wide association study to prioritize an additional SNP for further study. Five SNPs from the CHEK2, MGMT, SULT1E1 and SULT1A1 genes, genotyped in a total of 1597 cases and 1507 controls from two case-control studies, the Australian National Endometrial Cancer Study and the Polish Endometrial Cancer Study, were assessed for association with endometrial cancer risk using logistic regression analysis. Imputed data was drawn for CHEK2 rs8135424 for 666 cases from the Study of Epidemiology and Risk factors in Cancer Heredity study and 5190 controls from the Wellcome Trust Case Control Consortium. We observed no association between SNPs in the MGMT, SULT1E1 and SULT1A1 genes and endometrial cancer risk. The A allele of the rs8135424 CHEK2 SNP was associated with decreased risk of endometrial cancer (adjusted per-allele OR 0.83; 95%CI 0.70-0.98; p = .03) however this finding was opposite to that previously published. Imputed data for CHEK2 rs8135424 supported the direction of effect reported in this study (OR 0.85; 95% CI 0.65-1.10). Previously reported endometrial cancer risk associations with SNPs from in genes involved in estrogen metabolism and DNA repair were not replicated in our larger study population. This study highlights the need for replication of candidate gene SNP studies using large sample groups, to confirm risk associations and better prioritize downstream studies to assess the causal relationship between genetic variants and cancer risk. Our findings suggest that the CHEK2 SNP rs8135424 be prioritized for further study as a genetic factor associated with risk of endometrial cancer.
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Affiliation(s)
- Tracy A O'Mara
- Hormone Dependent Cancer Program, Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia
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15
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Familial clustering of endometrial cancer in a well-defined population. Gynecol Oncol 2011; 122:75-8. [DOI: 10.1016/j.ygyno.2011.03.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 03/07/2011] [Accepted: 03/11/2011] [Indexed: 11/20/2022]
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Jena NR, Shukla PK, Jena HS, Mishra PC, Suhai S. O6-Methylguanine Repair by O6-Alkylguanine-DNA Alkyltransferase. J Phys Chem B 2009; 113:16285-90. [DOI: 10.1021/jp907836w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- N. R. Jena
- Division Molecular Biophysics (B020), Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 580, D-69120 Heidelberg, Germany, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India, Department of Physics, Banaras Hindu University, Varanasi-221005, India, and Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India
| | - P. K. Shukla
- Division Molecular Biophysics (B020), Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 580, D-69120 Heidelberg, Germany, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India, Department of Physics, Banaras Hindu University, Varanasi-221005, India, and Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India
| | - H. S. Jena
- Division Molecular Biophysics (B020), Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 580, D-69120 Heidelberg, Germany, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India, Department of Physics, Banaras Hindu University, Varanasi-221005, India, and Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India
| | - P. C. Mishra
- Division Molecular Biophysics (B020), Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 580, D-69120 Heidelberg, Germany, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India, Department of Physics, Banaras Hindu University, Varanasi-221005, India, and Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India
| | - S. Suhai
- Division Molecular Biophysics (B020), Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 580, D-69120 Heidelberg, Germany, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India, Department of Physics, Banaras Hindu University, Varanasi-221005, India, and Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India
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Zhong Y, Huang Y, Huang Y, Zhang T, Ma C, Zhang S, Fan W, Chen H, Qian J, Lu D. Effects of O6-methylguanine-DNA methyltransferase (MGMT) polymorphisms on cancer: a meta-analysis. Mutagenesis 2009; 25:83-95. [PMID: 19892775 DOI: 10.1093/mutage/gep050] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
O(6)-methylguanine-DNA methyltransferase is one of the rare proteins to directly remove alkylating agents in the human DNA direct reversal repair pathway. Its two common single-nucleotide polymorphisms, Leu84Phe and Ile143Val, had previously been identified to contribute to susceptibility of cancer. However, there are conflicting results in studies on the association of the two polymorphisms with cancer. Therefore, we conducted a meta-analysis to clarify the paradox with a large collected sample (13,069 cancer patients and 20,290 controls). We found significant association between the T allele (84Phe) and cancer risk, under the recessive genetic model [P = 0.023, odds ratio (OR) = 1.251, 95% confidence interval (CI) 1.031-1.517, P(heterogeneity) = 0.270], TT versus CC comparison (P = 0.035, OR = 1.239, 95% CI 1.015-1.511, P(heterogeneity) = 0.225) and TT versus CT comparison (P = 0.007, OR = 1.292, 95% CI 1.071-1.559, P(heterogeneity) = 0.374), using the random-effect model. In the ethnicity subgroup analysis, a significant association with cancer among Caucasians was found under the recessive genetic model, homozygote comparison and TT versus TC comparison. In the tumour sites subgroup analysis, only the protective effects of Leu84Phe polymorphism were found in colorectal cancer, under CT versus CC comparison. No significant association between the G allele of Ile143Val and cancer risk was found. The G allele showed an increased lung cancer risk under the dominant genetic model and AG versus AA comparison in all Hardy-Weinberg equilibrium subjects, only when the fixed-effect model was used. However, it was insignificant in the random-effect model.
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Affiliation(s)
- Yu Zhong
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Science, Fudan University, Shanghai, People's Republic of China
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Association between lung cancer risk and single nucleotide polymorphisms in the first intron and codon 178 of the DNA repair gene,O6-alkylguanine–DNA alkyltransferase. Int J Cancer 2008; 122:791-5. [DOI: 10.1002/ijc.23059] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Povey AC, Margison GP, Santibáñez-Koref MF. Lung cancer risk and variation in MGMT activity and sequence. DNA Repair (Amst) 2007; 6:1134-44. [PMID: 17569600 DOI: 10.1016/j.dnarep.2007.03.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
O(6)-Alkylguanine-DNA alkyltransferase (MGMT) repairs DNA adducts that result from alkylation at the O(6) position of guanine. These lesions are mutagenic and toxic and can be produced by a variety of agents including the tobacco-specific nitrosamines, carcinogens present in cigarette smoke. Here, we review some of our work in the context of inter-individual differences in MGMT expression and their potential influence on lung cancer risk. In humans there are marked inter-individual differences in not only levels of DNA damage in the lung (N7-methylguanine) that can arise from exposure to methylating agents but also in MGMT activity in lung tissues. In the presence of such exposure, this variability in MGMT activity may alter cancer susceptibility, particularly as animal models have demonstrated that the complete absence of MGMT activity predisposes to alkylating-agent induced cancer while overexpression is protective. Recent studies have uncovered a series of polymorphisms that affect protein activity or are associated with differences in expression levels. The associations between these (and other) polymorphisms and cancer risk are inconsistent, possibly because of small sample sizes and inter-study differences in lung cancer histology. We have recently analysed a consecutive series of case-control studies and found evidence that lung cancer risk was lower in subjects with the R178 allele.
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Affiliation(s)
- Andrew C Povey
- Centre for Occupational and Environmental Health, University of Manchester, United Kingdom.
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Bugni JM, Han J, Tsai MS, Hunter DJ, Samson LD. Genetic association and functional studies of major polymorphic variants of MGMT. DNA Repair (Amst) 2007; 6:1116-26. [PMID: 17569599 DOI: 10.1016/j.dnarep.2007.03.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The DNA repair protein, O(6)-methylguanine DNA-methyltransferase (MGMT) prevents mutations and cell death that result from aberrant alkylation of DNA. The polymorphic variants Leu84Phe, Ile143Val, and Lys178Arg are frequent in the human population. We review here studies of these and other MGMT polymorphisms and their association with risk for lung, breast, colorectal and endometrial cancer with a consideration of gene-environment interactions. In addition, we review studies of the effects of polymorphic variation on alkyltransferase activity and expression. It is formally possible that polymorphic variation could modify functions of MGMT other than its alkyltransferase activity. While it was previously reported that an alkylated form of MGMT modifies Estrogen Receptor alpha activity, from our studies we conclude that this regulation is not a major function of MGMT. Overall, the effects of polymorphic variation on protein function are subtle, and further investigation is required to provide a comprehensive mechanism that explains the observed associations of these variants with risk for cancer.
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Affiliation(s)
- James M Bugni
- Biological Engineering Division, Biology Department, and Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
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Abstract
This article summarizes the current understanding of known variant forms of the MGMT gene that encode an altered protein. Epidemiological studies have been carried out to test whether these alterations are associated with altered cancer risk. Laboratory studies using recombinant proteins and cells expressing the known variants have investigated the possible effects of these sequence alterations on the ability of the encoded O(6)-alkylguanine-DNA alkyltransferase protein to protect cells from alkylation damage and to respond to therapeutic inactivators currently undergoing trials for cancer chemotherapy.
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Affiliation(s)
- Anthony E Pegg
- Department of Cellular and Molecular Physiology, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA.
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