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Inácio Â, Aguiar L, Rodrigues B, Pires P, Ferreira J, Matos A, Mendonça I, Rosa R, Bicho M, Medeiros R, Bicho MC. Genetic Modulation of HPV Infection and Cervical Lesions: Role of Oxidative Stress-Related Genes. Antioxidants (Basel) 2023; 12:1806. [PMID: 37891885 PMCID: PMC10604255 DOI: 10.3390/antiox12101806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Human papillomavirus (HPV) infection is a necessary but not sufficient factor for the development of invasive cervical cancer (ICC) and high-grade intraepithelial lesion (HSIL). Oxidative stress is known to play a crucial role in HPV infection and carcinogenesis. In this study, we comprehensively investigate the modulation of HPV infection, HSIL and ICC, and ICC through an exploration of oxidative stress-related genes: CβS, MTHFR, NOS3, ACE1, CYBA, HAP, ACP1, GSTT1, GSTM1, and CYP1A1. Notably, the ACE1 gene emerges as a prominent factor with the presence of the I allele offering protection against HPV infection. The association of NOS3 with HPV infection is perceived with the 4a allele showing a protective effect. The presence of the GSTT1 null mutant correlates with increased susceptibility to HPV infection, HSIL and ICC, and ICC. This study also uncovers intriguing epistatic interactions among some of the genes that further accentuate their roles in disease modulation. Indeed, the epistatic interactions between the BB genotype (ACP1) and DD genotype (ECA1) were shown to increase the risk of HPV infection, and the interaction between BB (ACP1) and 0.0 (GSTT1) was associated with HPV infection and cervical lesions. These findings underscore the pivotal role of four oxidative stress-related genes in HPV-associated cervical lesions and cancer development, enriching our clinical understanding of the genetic influences on disease manifestation. The awareness of these genetic variations holds potential clinical implications.
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Affiliation(s)
- Ângela Inácio
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto Bento da Rocha Cabral, 1250-047 Lisboa, Portugal
| | - Laura Aguiar
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto Bento da Rocha Cabral, 1250-047 Lisboa, Portugal
| | - Beatriz Rodrigues
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Patrícia Pires
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Joana Ferreira
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto Bento da Rocha Cabral, 1250-047 Lisboa, Portugal
| | - Andreia Matos
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto Bento da Rocha Cabral, 1250-047 Lisboa, Portugal
| | - Inês Mendonça
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Raquel Rosa
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Manuel Bicho
- Laboratório de Genética, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto Bento da Rocha Cabral, 1250-047 Lisboa, Portugal
| | - Rui Medeiros
- Molecular Oncology & Viral Pathology Group, Research Center (CI-IPOP)/RISE@CI-IPOP, Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
| | - Maria Clara Bicho
- Instituto de Saúde Ambiental (ISAMB) e Laboratório Associado TERRA, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Instituto de Medicina Preventiva e Saúde Pública, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
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Majumder A. Targeting Homocysteine and Hydrogen Sulfide Balance as Future Therapeutics in Cancer Treatment. Antioxidants (Basel) 2023; 12:1520. [PMID: 37627515 PMCID: PMC10451792 DOI: 10.3390/antiox12081520] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
A high level of homocysteine (Hcy) is associated with oxidative/ER stress, apoptosis, and impairment of angiogenesis, whereas hydrogen sulfide (H2S) has been found to reverse this condition. Recent studies have shown that cancer cells need to produce a high level of endogenous H2S to maintain cell proliferation, growth, viability, and migration. However, any novel mechanism that targets this balance of Hcy and H2S production has yet to be discovered or exploited. Cells require homocysteine metabolism via the methionine cycle for nucleotide synthesis, methylation, and reductive metabolism, and this pathway supports the high proliferative rate of cancer cells. Although the methionine cycle favors cancer cells for their survival and growth, this metabolism produces a massive amount of toxic Hcy that somehow cancer cells handle very well. Recently, research showed specific pathways important for balancing the antioxidative defense through H2S production in cancer cells. This review discusses the relationship between Hcy metabolism and the antiapoptotic, antioxidative, anti-inflammatory, and angiogenic effects of H2S in different cancer types. It also summarizes the historical understanding of targeting antioxidative defense systems, angiogenesis, and other protective mechanisms of cancer cells and the role of H2S production in the genesis, progression, and metastasis of cancer. This review defines a nexus of diet and precision medicine in targeting the delicate antioxidative system of cancer and explores possible future therapeutics that could exploit the Hcy and H2S balance.
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Affiliation(s)
- Avisek Majumder
- Department of Medicine, University of California, San Francisco, CA 94143, USA
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Silva NNT, Santos ACS, Brito MDFDDS, Peixoto do Vale DBA, Carneiro CM, Lima AA. Levels of Folate and Vitamin B12, and Genetic Polymorphisms Involved in One-Carbon Metabolism May Increase the Risk of Cervical Cytological Abnormalities. Nutr Cancer 2021; 74:2779-2788. [PMID: 34963390 DOI: 10.1080/01635581.2021.2022723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
To analyze the association of cervical cytological abnormalities with genetic polymorphisms of enzymes involved in folate metabolism, and the effect of micronutrients on association of polymorphisms with cervical carcinogenesis. Our samples were divided in Control (120 women with normal cytology), and Cases: 37 women with Atypical Squamous Cells of Undetermined Significance(ASC-US), 33 participants presenting Low-Grade Squamous Intraepithelial Lesion(LSIL), and 24 women presenting High-Grade cervical lesions(HSIL/ASC-H). We obtained cervical samples for cytological analysis, HPV detection, and analysis of polymorphisms and cervical cell folate. Blood samples were obtained for serum folate and vitamin B12 evaluation. To analyze all polymorphisms simultaneously, we calculated Genetic Risk Score(GRS). Median concentrations were used as cutoff for determination of micronutrient levels. We observed no differences of genotype or allelic frequencies of polymorphisms according to cervical lesions. However, high levels of cervical cell folate and high number of genetic alterations increased risk of High-Grade lesions [OR(IC95%):1.85(0.42-8.11)]. Instead, women with vitamin B12 ≤ 274 pg/ml and GRS ≥ 3 presented even greater risk of HSIL/ASC-H [OR(IC95%):2.91(0.46-18.62)]. High frequency of genetic polymorphisms involved in one-carbon metabolism associated with high levels of cell folate or low levels of serum vitamin B12, increased the risk of High-Grade lesion in uterine cervix.
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Affiliation(s)
- Nayara Nascimento Toledo Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Ana Carolina Silva Santos
- Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Maria de Fátima Dias de Sousa Brito
- Serviço de patologia do trato genital inferior da Maternidade Odete Valadares - Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Diama Bradha Andrade Peixoto do Vale
- Departamento de Tocoginecologia, Divisão de Oncologia, Faculdade de Ciências Médicas da Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Cláudia Martins Carneiro
- Programa de Pós-Graduação em Ciências Biológicas e Biotecnologia, Departamento de Análises Clínicas, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Angélica Alves Lima
- Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
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Elsaid HH, El-Hefnawy KA, Elalawi SM. C677T MTHFR Gene Polymorphism is Contributing Factor in Development of Renal Impairment in Young Hypertensive Patients. Indian J Clin Biochem 2020; 36:213-220. [PMID: 33867713 DOI: 10.1007/s12291-020-00890-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/01/2020] [Indexed: 12/27/2022]
Abstract
Homocysteine concentration affected by the activities of the enzymes methylene tetra-hyrdofolate reductase (MTHFR). Polymorphisms in MTHFR gene associated with an impairment of MTHFR activity. Hyperhomocysteinemia is a result of single nucleotide polymorphisms (SNPs) in MTHFR 677 C>T that can cause homocysteine levels in the blood to increase. The purpose of this study is to investigate the relationships between MTHFR C677T (rs1801133) gene polymorphism, changes in homocysteine concentrations and progress of renal impairment in young adult hypertensive patients. Two hundred young hypertensive patients (age 21-24 years) were involved in this study; they were classified into patients with and without renal impairment in addition to 200 age and sex matched healthy controls. All participants were submitted to laboratory investigations as assay of MTHFR gene polymorphism C677T (rs1801133) by PCR/RFLP, determination of lipid profile, homocysteine and folic acid concentrations in addition to urinary albumin creatinine ratio (UACR). The levels of both homocysteine and UACR in the TT genotype patients were higher than those in the CC genotype group. Individuals who carry the T allele were more risky to hypertension and progress to early renal impairment in young age compared with those carrying the C allele [OR 2.02 (1.33-3.08), P < 0.001]. Genetic variants of C677T MTHFR gene and hyperhomocysteinemia may be responsible for rapid progress of renal impairment in Egyptian young age hypertensive patients. TT genotype or T allele may be considered as a predisposing factor for both elevated Hcy levels and the development of renal impairment. This study believed that lowering of homocysteine level can reduce renal impairment of hypertensive patients.
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Affiliation(s)
- Hanaa H Elsaid
- Clinical Pathology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Khaled A El-Hefnawy
- Internal Medicine Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Saffaa M Elalawi
- Clinical Pathology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Zhou X, Shan L, Na J, Li Y, Wang J. The SNP rs4846048 of MTHFR enhances the cervical cancer risk through association with miR-522: A preliminary report. Mol Genet Genomic Med 2020; 8:e1055. [PMID: 31750632 PMCID: PMC6978235 DOI: 10.1002/mgg3.1055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 10/14/2019] [Accepted: 10/23/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The present research was designed to explore the association between single nucleotide polymorphisms (SNPs) at the 3'-untranslated region (3'-UTR) of methylenetetrahydrofolate reductase (MTHFR) and the risk of cervical cancer (CC). METHODS From May 2015 to October 2016, a total of 197 patients (diagnosed with CC and precancerous lesions, and underwent surgical treatments) were enrolled in the study. Meanwhile, a total of 80 healthy cases were used as the controls. PCR-DNA analysis was used to explore the genotype of the SNPs (rs4846048 and rs55763075) of the MTHFR 3'-UTR as well as the association between allelic frequencies and the CC risk. Then, the role of rs4846048 SNPs in the association of microRNA-522 (miR-522) and MTHFR was evaluated through luciferase reporter assay. Meanwhile, the modulatory influence of miR-522 on cell apoptosis and viability of Hela cells was also detected by flow cytometry and MTT assay. RESULTS The rs4846048 AG and G allele frequencies were significantly higher in CC subgroup compared with the control group. Methylenetetrahydrofolate reductase rs4846048 A/G alleles contributed to miR-522 binding, and miR-522 negatively modulated the expressions of MTHFR. Furthermore, miR-522 overexpression increased cell viability but decreased apoptotic cells in Hela cells. CONCLUSION The preliminary report revealed that the SNP rs4846048 of MTHFR enhanced the risk of CC through association with miR-522, which further regulated cell viability and apoptosis in Hela cells.
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Affiliation(s)
- Xinyue Zhou
- Department of Obstetrics and GynecologyThe General Hospital of Northern Theater CommandShenyangLiaoningChina
| | - Lili Shan
- Department of Obstetrics and GynecologyThe General Hospital of Northern Theater CommandShenyangLiaoningChina
| | - Jing Na
- Department of Obstetrics and GynecologyThe General Hospital of Northern Theater CommandShenyangLiaoningChina
| | - Ya Li
- Department of Obstetrics and GynecologyThe General Hospital of Northern Theater CommandShenyangLiaoningChina
| | - Jun Wang
- Department of Obstetrics and GynecologyThe General Hospital of Northern Theater CommandShenyangLiaoningChina
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George AK, Majumder A, Ice H, Homme RP, Eyob W, Tyagi SC, Singh M. Genes and genetics in hyperhomocysteinemia and the "1-carbon metabolism": implications for retinal structure and eye functions. Can J Physiol Pharmacol 2019; 98:51-60. [PMID: 31369712 DOI: 10.1139/cjpp-2019-0236] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Homocysteine (Hcy), a sulfur-containing nonproteinogenic amino acid, is generated as a metabolic intermediate. Hcy constitutes an important part of the "1-carbon metabolism" during methionine turnover. Elevated levels of Hcy known as hyperhomocysteinemia (HHcy) results from vitamin B deficiency, lack of exercise, smoking, excessive alcohol intake, high-fat and methionine-rich diet, and the underlying genetic defects. These factors directly affect the "1-carbon metabolism (methionine-Hcy-folate)" of a given cell. In fact, the Hcy levels are determined primarily by dietary intake, vitamin status, and the genetic blueprint of the susceptible individual. Although Hcy performs an important role in cellular functions, genetic alterations in any of the key enzymes responsible for the "1-carbon metabolism" could potentially upset the metabolic cycle, thus causing HHcy environment in susceptible people. As such, HHcy relates to several clinical conditions like atherosclerosis, myocardial infarction, stroke, cognitive impairment, dementia, Parkinson's disease, multiple sclerosis, epilepsy, and ocular disorders, among others. This article summarizes the findings from our laboratory and public database regarding genetics of HHcy and its effects on ocular disorders, their respective management during dysregulation of the 1-carbon metabolism.
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Affiliation(s)
- Akash K George
- Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA.,Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Avisek Majumder
- Department of Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - Hayley Ice
- Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA.,Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Rubens P Homme
- Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA.,Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Wintana Eyob
- College of Arts and Sciences, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Suresh C Tyagi
- Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Mahavir Singh
- Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA.,Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
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Silva NNT, Sabino ADP, Tafuri A, Lima AA. Lack of association between methylenetetrahydrofolate reductase C677T polymorphism, HPV infection and cervical intraepithelial neoplasia in Brazilian women. BMC MEDICAL GENETICS 2019; 20:100. [PMID: 31170928 PMCID: PMC6554906 DOI: 10.1186/s12881-019-0831-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 05/21/2019] [Indexed: 12/04/2022]
Abstract
BACKGROUND Cervical cancer has high prevalence and mortality rates in worldwide female population. Persistent infection by high-risk Human Papillomavirus (hr-HPV) is the main cause of this cancer. However, many environmental, genetical, and epigenetical cofactors can modulate viral infection and cervical carcinogenesis. Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism is a genetic factor that has been associated with many pathologies, including cancer. Nevertheless, studies with cervical cancer presented controversial results, and varied according to ethnicity. Thus, the aim of this study was to determine association between MTHFR C677T polymorphism, Human Papillomavirus (HPV) infection and cervical cancer. METHODS A case-control study was performed with 150 histological cervical samples. Case group were divided in Cervical Intraepithelial Neoplasia (CIN) grade I (n = 30), CIN II (n = 30), CIN III (n = 30), and Squamous Cervical Carcinoma (SCC) (n = 30). Control group was composed by 30 samples without lesion, presenting cervicitis. HPV detection was performed by conventional Polymerase Chain Reaction (PCR) with SPF primers set, and by real-time PCR specific for HPV 16 and hr-HPV. MTHFR C677T polymorphism was analyzed by PCR followed by Restriction Fragment Length Polymorphism (RFLP). RESULTS Frequency of MTHFR CC genotype was 72.7% (n = 109), CT 23.3% (n = 35) and TT 4.0% (n = 6). Polymorphic T allele frequency was 15.7%. No statistically significant association was observed between MTHFR C677T polymorphism and presence of pre-neoplastic or neoplastic cervical lesions. Similar frequencies of T allele was observed in control (23.3%) and cases (13.3%) groups (p = 0.174). In addition, there was no statistically significant association between MTHFR C677T polymorphism and viral infection, even considering hr-HPV or HPV 16 positivity. CONCLUSION MTHFR C677T polymorphism was not associated with cervical cancer and HPV infection.
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Affiliation(s)
- Nayara Nascimento Toledo Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais 35400-000 Brazil
| | - Adriano de Paula Sabino
- Departamento de Análises Clínicas e Toxicológicas, Universidade Federal de Minas Gerais, President Antônio Carlos Avenue, 6627, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Alexandre Tafuri
- Laboratório Tafuri, São Paulo Street, 893, Belo Horizonte, Minas Gerais 30170-131 Brazil
| | - Angélica Alves Lima
- Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais 35400-000 Brazil
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Ozsoy AZ, Cakmak B, Nacar MC, Cetin A, Demirturk F, Dogru HY, Karakus N, Yigit S. MTHFR and IL-4 Gene Polymorphisms Are Not Associated with Primary Dysmenorrhea in Young Adults. INT J HUM GENET 2017. [DOI: 10.1080/09723757.2015.11886255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Asker Zeki Ozsoy
- Departments of Obstetrics and Gynecology and Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Bulent Cakmak
- Departments of Obstetrics and Gynecology and Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Mehmet Can Nacar
- Departments of Obstetrics and Gynecology and Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Ali Cetin
- Department of Obstetrics and Gynecology, Cumhuriyet University Faculty of Medicine, Sivas, Turkey
| | - Fazli Demirturk
- Departments of Obstetrics and Gynecology and Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Hatice Yilmaz Dogru
- Departments of Obstetrics and Gynecology and Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Nevin Karakus
- Medical Biology, Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
| | - Serbulent Yigit
- Medical Biology, Gaziosmanpasa University Faculty of Medicine, Tokat, Turkey
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The association between MTHFR polymorphisms and cervical cancer risk: a system review and meta analysis. Arch Gynecol Obstet 2016; 294:579-88. [PMID: 26879954 DOI: 10.1007/s00404-016-4037-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 02/03/2016] [Indexed: 12/28/2022]
Abstract
PURPOSE Methylenetetrahydrofolate reductase (MTHFR) plays an important role in determining the proportions of folate coenzymes for DNA synthesis or DNA methylation. Published data on the association between the MTHFR polymorphisms and cervical risk are controversial. A meta-analysis was performed to assess whether the polymorphisms of MTHFR are associated with cervical cancer risk. METHODS Medline, Embase, China National Knowledge Infrastructure and Chinese Biomedicine Databases were searched to identify eligible studies. Pooled odds ratios (ORs) and 95 % confidence intervals (CIs) for MTHFR C677T and MTHFR A1298C polymorphisms and cervical cancer were appropriately derived from fixed-effects or random effects models. Five different ORs were calculated: (1) allele contrast (C vs. T), (2) homozygous comparison (CC vs. TT), (3) heterozygous comparison (CC vs. CT), (4) dominant model (CC vs. CT+TT) and (5) recessive model (CC+CT vs. TT). RESULTS A total of 13 studies, which included 12 studies for MTHFR C677T (2332 cases and 3000 controls) and five studies for A1298C polymorphisms (677 cases and 1191 controls), were enrolled in this meta-analysis. The pooled analyses revealed that MTHFR C677T polymorphism was not associated with cervical cancer risk; while the A1298C polymorphism had a significant association with increased cervical cancer risk in allele contrast, heterozygote comparison and dominant model (A C, OR = 0.84, 95 % CI = 0.71-0.98; AA vs. CC OR = 0.72, 95 % CI = 0.59-0.89; AA vs. AC+CC, OR = 0.72, 95 % CI = 0.59-0.88). The significant associations between MTHFR A1298C polymorphism and cervical cancer were found among Asians and population-based case-control studies. CONCLUSIONS This study indicated that the MTHFR C677T may be no associated with cervical cancer risk, and yet the MTHFR A1298C polymorphism may be a risk factor for cervical cancer.
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Yang Y, Luo Y, Yuan J, Tang Y, Xiong L, Xu M, Rao X, Liu H. Association between maternal, fetal and paternal MTHFR gene C677T and A1298C polymorphisms and risk of recurrent pregnancy loss: a comprehensive evaluation. Arch Gynecol Obstet 2015; 293:1197-211. [DOI: 10.1007/s00404-015-3944-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 10/23/2015] [Indexed: 11/24/2022]
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Chen H, Yang X, Lu M. Methylenetetrahydrofolate reductase gene polymorphisms and recurrent pregnancy loss in China: a systematic review and meta-analysis. Arch Gynecol Obstet 2015; 293:283-90. [DOI: 10.1007/s00404-015-3894-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 09/14/2015] [Indexed: 10/23/2022]
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Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism: epidemiology, metabolism and the associated diseases. Eur J Med Genet 2014; 58:1-10. [PMID: 25449138 DOI: 10.1016/j.ejmg.2014.10.004] [Citation(s) in RCA: 246] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 10/26/2014] [Indexed: 02/06/2023]
Abstract
The Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism is associated with various diseases (vascular, cancers, neurology, diabetes, psoriasis, etc) with the epidemiology of the polymorphism of the C677T that varies dependent on the geography and ethnicity. The 5,10-Methylenetetrahydrofolate reductase (MTHFR) locus is mapped on chromosome 1 at the end of the short arm (1p36.6). This enzyme is important for the folate metabolism which is an integral process for cell metabolism in the DNA, RNA and protein methylation. The mutation of the MTHFR gene which causes the C677T polymorphism is located at exon 4 which results in the conversion of valine to alanine at codon 222, a common polymorphism that reduces the activity of this enzyme. The homozygous mutated subjects have higher homocysteine levels while the heterozygous mutated subjects have mildly raised homocysteine levels compared with the normal, non-mutated controls. Hyperhomocysteinemia is an emerging risk factor for various cardiovascular diseases and with the increasing significance of this polymorphism in view of the morbidity and mortality impact on the patients, further prevention strategies and nutritional recommendations with the supplementation of vitamin B12 and folic acid which reduces plasma homocysteine level would be necessary as part of future health education. This literature review therefore focuses on the recent evidence-based reports on the associations of the MTHFR C677T polymorphism and the various diseases globally.
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CD95 rs1800682 polymorphism and cervical cancer risk: evidence from a meta-analysis. Tumour Biol 2013; 35:1785-90. [PMID: 24114012 DOI: 10.1007/s13277-013-1237-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 09/18/2013] [Indexed: 12/24/2022] Open
Abstract
CD95 is the first death receptor identified and characterized in recent years, and it plays important roles in the molecular network regulating cell death and survival. CD95 rs1800682 polymorphism is a common genetic polymorphism identified in the CD95 gene. Many publications evaluated the association between CD95 rs1800682 polymorphism and cervical cancer risk, but the association remained inconclusive. To provide a more precise estimate on the association, a meta-analysis was carried out. The association between CD95 rs1800682 polymorphism and cervical cancer risk was assessed by calculating the pooled odds ratio (OR) with its 95% confidence intervals (95% CI). On the basis of our inclusion criteria, ten studies with a total of 5,481 individuals were included into the meta-analysis. There was obvious heterogeneity among the included studies. Meta-analysis of the ten studies suggested that there was no association between CD95 rs1800682 polymorphism and cervical cancer risk under all four genetic models (allele model: OR = 1.05, 95% CI 0.92-1.18, P = 0.478; homozygous model: OR = 1.08, 95% CI 0.83-1.41, P = 0.550; dominant model: OR = 1.12, 95% CI 0.88-1.42, P = 0.347; recessive model: OR = 1.00, 95% CI 0.76-1.31, P = 0.978). Subgroup analysis by ethnicity suggested that there was no association between CD95 rs1800682 polymorphism and cervical cancer risk in Asians, Caucasians, and Africans. Thus, the meta-analysis suggests that CD95 rs1800682 polymorphism is not associated with cervical cancer risk.
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