1
|
Elderdery AY, Tebein EM, Alenazy FO, Elkhalifa AME, Shalabi MG, Abbas AM, Alhassan HH, Davuljigari CB, Mills J. Impact of Methionine Synthase Reductase Polymorphisms in Chronic Myeloid Leukemia Patients. Genes (Basel) 2022; 13:genes13101729. [PMID: 36292614 PMCID: PMC9602384 DOI: 10.3390/genes13101729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/15/2022] [Accepted: 09/23/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction: Metabolism methionine and of folate play a vital function in cellular methylation reactions, DNA synthesis and epigenetic process.However, polymorphisms of methionine have received much attention in recent medical genetics research. Objectives: To ascertain whether the common polymorphisms of the MTRR (Methionine Synthase Reductase) A66G gene could play a role in affecting susceptibility to Chronic Myeloid Leukemia (CML) in Sudanese individuals. Methods: In a case-controlled study, we extracted and analyzed DNA from 200 CML patients and 100 healthy control subjects by the PCR-RFLP method. Results: We found no significant difference in age orgender between the patient group and controls. The MTRR A66G genotypes were distributed based on the Hardy-Weinberg equilibrium (p > 0.05). The variation of MTRR A66G was less significantly frequent in cases with CML (68.35%) than in controls (87%) (OR = 0.146, 95% CI = 0.162−0.662, p < 0.002). Additionally, AG and GG genotypes and G allele were reducing the CML risk (Odds ratio [OR] = 0.365; 95% CI [0.179−0.746]; p = 0.006; OR = 0.292; 95% CI [0.145−0.590]; p = 0.001 and OR = 0.146; 95% CI [0.162−0.662]; p = 0.002 and OR = 2.0; 95% CI [1.3853−2.817]; respectively, (p = 0.000)). Conclusions: Our data demonstrated that heterozygous and homozygous mutant genotypes of MTRR polymorphisms were associated with decreased risk of developing CML in the Sudanese population.
Collapse
Affiliation(s)
- Abozer Y. Elderdery
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
- Health Sciences Research Unit, Jouf University, Sakaka 72388, Saudi Arabia
- Correspondence: (A.Y.E.); (C.B.D.)
| | - Entesar M. Tebein
- College of Applied Medical Sciences, Shaqra University, Shaqra 11961, Saudi Arabia
| | - Fawaz O. Alenazy
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
| | - Ahmed M. E. Elkhalifa
- Department of Public Health, College of Health Sciences, Saudi Electronic University, Riyadh 11673, Saudi Arabia
- Department of Haematology, Faculty of Medical Laboratory Sciences, University of El Imam El Mahdi, Kosti 11588, Sudan
| | - Manar G. Shalabi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
| | - Anass M. Abbas
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
| | - Hassan H. Alhassan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
| | - Chand B. Davuljigari
- Department of Zoology, College of Sciences, Sri Venkateswara University, Tirupati 517502, Andhra Pradesh, India
- Correspondence: (A.Y.E.); (C.B.D.)
| | - Jeremy Mills
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth PO1 2UP, UK
| |
Collapse
|
2
|
Al-Elwany OAAI, Hemida KA, Abdel-Razek MA, El-Mageed TAA, El-Saadony MT, AbuQamar SF, El-Tarabily KA, Taha RS. Impact of Folic Acid in Modulating Antioxidant Activity, Osmoprotectants, Anatomical Responses, and Photosynthetic Efficiency of Plectranthus amboinicus Under Salinity Conditions. FRONTIERS IN PLANT SCIENCE 2022; 13:887091. [PMID: 35968108 PMCID: PMC9367479 DOI: 10.3389/fpls.2022.887091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Salinity is a major threat to the sustainability of agricultural production systems. Salt stress has unfavorable implications on various plant physio-morphological and biochemical reactions, causing osmotic and ionic stress. Exogenously applied folic acid (FA) may at least provide one mechanism to evade the injurious stress effects of saline irrigation water on Plectranthus amboinicus. In this regard, two pot trials were performed during the 2018-2019 and 2019-2020 seasons in an open greenhouse of an experimental farm (29°17'N; 30°53'E) in Fayoum, Egypt. We tested four levels of saline irrigation water (SW): 34, 68, and 102 mM NaCl, plus tap water as the control = 0), combined with FA at three concentrations (25 and 50 μM, plus spray with distilled water as the control = 0). The growth parameters, biochemistry, physiology, elemental leaf status, essential oil content, and anatomical responses were assessed. Salt markedly reduced photosynthetic productivity [Fv/Fm and performance index (PI)], total chlorophyll [soil plant analysis development (SPAD)], and leaf osmoprotectant compounds, i.e., total soluble sugars (TSS), free amino acids, proline, and total phenolics, thus hampering P. amboinicus growth and essential oil yield. However, the addition of FA as a foliar spray to P. amboinicus irrigated with saline water induced increases in Fv/Fm, SPAD, and PI. These were linked with enriched stem anatomical structures, leaf osmoprotectant compounds, and enhanced leaf enzymatic activity, e.g., superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase, glutathione, ascorbic acid, and antioxidant content. Under salt stress, supplementation of 25 and 50 μM FA increased the growth and production of essential oil by 27.8 and 55.6%, respectively, compared with no applied FA. The highest growth characteristics and elemental leaf contents were obtained when P. amboinicus was irrigated with 0 mM saline water and treated foliarly with 50 μM of FA compared with non-treated plants. Overall, these data showed that foliar spraying with FA reduces the impact of salt stress on P. amboinicus irrigated with saline water.
Collapse
Affiliation(s)
| | | | | | | | - Mohamed T. El-Saadony
- Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Synan F. AbuQamar
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Khaled A. El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
- Khalifa Center for Genetic Engineering and Biotechnology, United Arab Emirates University, Al-Ain, United Arab Emirates
- Harry Butler Institute, Murdoch University, Murdoch, WA, Australia
| | - Ragab S. Taha
- Botany Department, Faculty of Agriculture, Beni-Suef University, Beni-Suef, Egypt
| |
Collapse
|
3
|
Increase in CD5L expression in the synovial membrane of knee osteoarthritis patients with obesity. Cent Eur J Immunol 2021; 46:231-235. [PMID: 34764792 PMCID: PMC8568027 DOI: 10.5114/ceji.2021.108180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 09/02/2020] [Indexed: 11/17/2022] Open
Abstract
Introduction Obesity appears to be a powerful risk factor for the development of knee osteoarthritis (KOA), but the mechanisms of this are not fully understood. CD5L is expressed in tissue macrophages and is increased in obese mice. We hypothesized that CD5L expression is increased in the synovial membrane (SM) of obese KOA patients. Here, we investigated CD5L expression in the SM of these patients. Material and methods Ninety KOA patients (26 males, 64 females) were allocated to one of three groups based on body mass index (BMI): normal weight (NW, < 25 kg/m2), overweight (OW, 25-29.99 kg/m2) and obese (OB, ≥ 30 kg/m2), according to the World Health Organization BMI classification (each n = 30). Expression of CD5L in SM among the groups was compared using real-time polymerase chain reaction. To investigate CD5L-expressing cells in SM, CD14+ (macrophage fraction) and CD14- (fibroblast fraction) cells were separated from the SM. Results CD5L expression was significantly higher in the OB group than in the NW and OW groups (p < 0.001). CD5L expression was observed in the CD14+ fraction but not in the CD14- fraction. Conclusions CD5L is highly expressed in the SM of KOA patients with obesity. Further investigation is required to identify the role of CD5L in the relationship between KOA pathology and obesity.
Collapse
|
4
|
Zhan H, Bai Y, Lv Y, Zhang X, Zhang L, Deng S. Pharmacological mechanism of mylabris in the treatment of leukemia based on bioinformatics and systematic pharmacology. Bioengineered 2021; 12:3229-3239. [PMID: 34224300 PMCID: PMC8806889 DOI: 10.1080/21655979.2021.1943110] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Leukemia is a common blood cancer, whose treatment usually necessitates chemo/radiotherapy and bone marrow transplant. Hence, safer and more effective options are urgently needed. Mylabris, the dried body of blister beetles, has been used extensively in traditional Chinese medicine. This study applied bioinformatics and systematic pharmacology to investigate the mechanism of action of mylabris in the treatment of leukemia. Five effective components and 35 corresponding target proteins were identified by screening the TCMSP database; whereas 776 genes related to leukemia were selected using OMIM, GeneCards, and the Therapeutic Target Database. Eight genes common to mylabris and leukemia were identified. Protein-protein interaction network analysis and a component-target-pathway diagram identified TP53 and PTEN as key gene targets of mylabris in the treatment of leukemia. GO enrichment analysis pointed to DNA damage and cell cycle disorder caused by p53 signaling as the most significant processes; whereas KEGG enrichment pointed to the p53 signaling pathway. In summary, mylabris may exert a therapeutic effect on leukemia by triggering DNA damage, inducing apoptosis, as well as inhibiting the growth and proliferation of tumor cells through the regulation of TP53 and PTEN. These findings provide a mechanistic rationale for the treatment of leukemia with traditional Chinese medicine.
Collapse
Affiliation(s)
- Huali Zhan
- Department of Humanities and Social Sciences, Zhejiang Industry Polytechnic College, Zhejiang, China
| | - Yujiao Bai
- Non-Coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China.,School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, China
| | - Yu Lv
- Wenzhou Medical University Renji College, Wenzhou, Zhejiang, China
| | - Xianqin Zhang
- School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, China
| | - Lin Zhang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.,Department of Pharmacy, Shaoxing People's Hospital; Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang, China
| | - Shanshan Deng
- Non-Coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China.,School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, China
| |
Collapse
|
5
|
Bai Y, Drokow EK, Waqas Ahmed HA, Song J, Akpabla GS, Kumah MA, Agyekum EB, Neku EA, Sun K. The relationship between methionine synthase rs1805087 polymorphism and hematological cancers risk. Future Oncol 2020; 16:2219-2233. [PMID: 32722923 DOI: 10.2217/fon-2020-0627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: The relationship between hematological cancer susceptibility and methionine synthase MTR A2756G (rs1805087) polymorphism is inconclusive based on data from past studies. Hence, this updated meta-analysis was conducted to investigate the relationship between methionine synthase reductase (MTR) rs1805087 polymorphism and hematological cancers. Method: We searched EMBASE, Google Scholar, Ovid and PubMed databases for possible relevant articles up to December 31, 2019. Results: The overall pooled outcome of our analysis showed lack of association between the risk of hematological malignancies and MTR A2756G polymorphism under the allele model (G vs A: odds ratio = 1.001, 95% CI: 0.944-1.061; p = 0.983), recessive model (GG vs GA + AA: odds ratio = 1.050, 95% CI: 0.942-1.170; p = 0.382). Conclusion: The findings in this study demonstrate a lack of relationship between hematological cancers and MTR A2756G.
Collapse
Affiliation(s)
- Yanliang Bai
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003, Zhengzhou, PR China.,Department of Haematology, Henan University People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, 450003, Henan, PR China
| | - Emmanuel Kwateng Drokow
- Department of Radiation Oncology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003, Zhengzhou, PR China
| | - Hafiz Abdul Waqas Ahmed
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003, Zhengzhou, PR China
| | - Juanjuan Song
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003, Zhengzhou, PR China
| | - Gloria Selorm Akpabla
- Department of Internal Medicine, Tianjin Medical University, 300070, Tianjin, PR China
| | - Maame Awoyoe Kumah
- Department of Internal Medicine, University of Ghana Medical School, KB 77 Korle Bu-Accra, Ghana
| | | | - Enyonam Adjoa Neku
- School of Pharmacy, Zhengzhou University, 450001, Zhengzhou, Henan, PR China
| | - Kai Sun
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003, Zhengzhou, PR China.,Department of Haematology, Henan University People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, 450003, Henan, PR China
| |
Collapse
|
6
|
Frikha R. Assessment of the relationship between methylenetetrahydrofolate reductase polymorphism and acute lymphoblastic leukemia: Evidence from an updated meta-analysis. J Oncol Pharm Pract 2020; 26:1598-1610. [PMID: 32070201 DOI: 10.1177/1078155219900914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The methylenetetrahydrofolate reductase gene C677T polymorphism is closely related to the acute lymphoblastic leukemia. Several case-control studies have investigated this association; however, no conclusions could be drawn. A comprehensive updated meta-analysis is established to explain these contradictions and clarify the overall impact of this variant on the susceptibility to acute lymphoblastic leukemia. METHODS Electronic searches were conducted to select published studies prior to June 2018. Pooled odds ratios and stratification analysis were performed under different genetic comparison models, age, and ethnicity. RESULTS Totally, 66 case-control studies including 9619 acute lymphoblastic leukemia cases and 17,396 controls were selected. Our analyses showed that methylenetetrahydrofolate reductase C677T polymorphism was protective mainly in Asian and European countries, under all genetic models and regardless of age, but leukemogenic in mixed population. CONCLUSION Thus, C677T polymorphism may be a promising acute lymphoblastic leukemia biomarker, but they should be interpreted with caution considering other factors such as folic acid intake, gene-gene and gene-environment interactions.
Collapse
Affiliation(s)
- Rim Frikha
- Faculty of Medicine, University of Sfax, Sfax-Tunisia.,Department of Medical Genetics, Hedi Chaker University Teaching Hospital, Sfax-Tunisia
| |
Collapse
|
7
|
Baba SM, Shah ZA, Javaid K, Pandith AA, Rasool J, Geelani SA, Baba RA, Amin S, Mohammad G. Methylenetetrahydrofolate Reductase Gene C677T and A1298C Polymorphic Sequence Variations Influences the Susceptibility to Chronic Myeloid Leukemia in Kashmiri Population. Front Oncol 2019; 9:612. [PMID: 31396477 PMCID: PMC6667548 DOI: 10.3389/fonc.2019.00612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 06/21/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Methylenetetrahydrofolate reductase (MTHFR) gene is a crucial regulator of folate metabolism and its two prominent polymorphic variants C677T and A1298C lead to decreased MTHFR enzyme activity. Aim of the Study: We planned this case-control study based on numerous studies supporting the association of MTHFR polymorphisms (C677T and A1298C) with CML risk in different ethnic populations. Therefore, the influence of these polymorphisms on CML susceptibility was investigated among Kashmiri population (North India). Materials and Methods: Polymerase chain reaction/restriction fragment length polymorphism (RFLP) technique was employed for genotyping MTHFR C677T and A1298C SNP's in 125 CML patients as against 150 age and gender matched healthy controls. Results: A significant difference was observed in frequency of 677CT genotype between cases and controls [46.4 vs. 27.3% (p = 0.0005)]. Similarly combined 677CT+TT genotype showed significant difference between cases and controls [50.4 vs. 28.6% (p = 0.0002)]. Both MTHFR 677CT and 677CT+TT genotypes imposed greater than 2-fold risk of developing CML (OR = 2.4, 95%CI: 1.46-4.05; OR = 2.5, 95%CI: 1.53-4.16). In case of A1298C SNP, the frequency of 1298AC genotype was higher in controls (64.0%) as compared to CML cases (48.8%) (p = 0.04) and imparted a significant protective role from CML predisposition. Furthermore, haplotype analysis revealed only "677CT/1298AA" haplotype significantly increased the risk of CML predisposition [(p = 0.008) (OR = 3.2, 95% CI: 1.3-7.4)]. Conclusion: We conclude that both MTHFR C677T and A1298C polymorphisms may be important genetic modifiers and seem to have a plausible role to confer risk of CML in Kashmiri population, where C677T SNP strongly increases the risk of CML while as A1298C SNP has a protective effect.
Collapse
Affiliation(s)
- Shahid M Baba
- Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Zafar A Shah
- Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Khushboo Javaid
- Department of Clinical Biochemistry, University of Kashmir, Srinagar, India
| | - Arshad A Pandith
- Advanced Centre for Human Genetics, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Javeed Rasool
- Department of Clinical Hematology, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Sajad A Geelani
- Department of Clinical Hematology, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Rafia A Baba
- Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Shajrul Amin
- Department of Clinical Biochemistry, University of Kashmir, Srinagar, India
| | - Gul Mohammad
- Department of Medical Oncology, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, India
| |
Collapse
|
8
|
Gómez-Gómez Y, Organista-Nava J, Villanueva-Flores F, Estrada-Brito JS, Rivera-Ramírez AB, Saavedra-Herrera MV, Jiménez-López MA, Illades-Aguiar B, Leyva-Vázquez MA. Association Between the 5,10-MTHFR 677C>T and RFC1 80G>A Polymorphisms and Acute Lymphoblastic Leukemia. Arch Med Res 2019; 50:175-180. [DOI: 10.1016/j.arcmed.2019.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 05/20/2019] [Accepted: 07/25/2019] [Indexed: 12/11/2022]
|
9
|
Umay A, Bilgin R, Akgöllü E, Gürkan E, Kis C. Relationship between MTHFR gene polymorphisms (C677T and A1298C) and chronic lymphocytic leukemia in the Turkish population. Meta Gene 2018. [DOI: 10.1016/j.mgene.2018.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
|
10
|
Lien SYA, Young L, Gau BS, K Shiao SP. Meta-prediction of MTHFR gene polymorphism-mutations, air pollution, and risks of leukemia among world populations. Oncotarget 2018; 8:4387-4398. [PMID: 27966457 PMCID: PMC5354840 DOI: 10.18632/oncotarget.13876] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 12/05/2016] [Indexed: 12/11/2022] Open
Abstract
The major objective of this study was to examine the association between Methylenetetrahydrofolate Reductase (MTHFR) polymorphisms and the risk of various types of leukemias across the lifespans of children and adults by using the meta-predictive techniques. The secondary objective was to examine the interactions among epigenetic risk factors (including air pollution), MTHFR polymorphisms, and the risks of developing leukemia. We completed a comprehensive search of 6 databases to find 54 studies (10,033 leukemia cases and 15,835 controls) for MTHFR 677, and 43 studies (8,868 cases and 14,301 controls) for MTHFR 1298, published from 1999 to 2014. The results revealed that, in European populations; childhood populations; children from Europe, East Asia, and America; and children with acute lymphocytic leukemia (ALL), MTHFR 677 polymorphisms (both TT and CT types together and individually) are protective, while CC wildtype was leukemogenic. In addition, MTHFR 1298 polymorphisms were protective against ALL and acute myeloid leukemia in European children, and in chronic myeloid leukemia in all adults worldwide and American adults. Air pollution played a role in the increased polymorphisms of MTHFR 677 genotypes in childhood leukemia.
Collapse
Affiliation(s)
- Shin-Yu A Lien
- School of Nursing, College of Medicine, Chang Gung University, Taoyuan, Taiwan (R.O.C.).,Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital Linkou Branch, Taoyuan, Taiwan (R.O.C.)
| | - Lufei Young
- College of Nursing, Augusta University, Augusta, Gerogia, USA
| | - Bih-Shya Gau
- School of Nursing, College of Medicine, National Taiwan University, Taipei, Taiwan (R.O.C.)
| | | |
Collapse
|
11
|
MTHFR, TS and XRCC1 genetic variants may affect survival in patients with myelodysplastic syndromes treated with supportive care or azacitidine. THE PHARMACOGENOMICS JOURNAL 2017; 18:444-449. [PMID: 29205204 DOI: 10.1038/tpj.2017.48] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 06/30/2017] [Accepted: 09/18/2017] [Indexed: 01/03/2023]
Abstract
We evaluated the impact of genomic polymorphisms in folate-metabolizing, DNA synthesis and DNA repair enzymes on the clinical outcome of 108 patients with myelodysplastic syndromes (MDS) receiving best supportive care (BSC) or azacitidine. A statistically significant association between methylenetetrahydrofolate reductase (MTHFR) 677T/T, thymidylate synthase (TS) 5'-untranslated region (UTR) 3RG, TS 3'-UTR -6 bp/-6 bp, XRCC1 399G/G genotypes and short survival was found in patients receiving BSC by multivariate analysis (P<0.001; P=0.026; P=0.058; P=0.024). MTHFR 677T/T, TS 3'-UTR -6 bp/-6 bp and XRCC1 399G/G genotypes were associated with short survival in patients receiving azacitidine by multivariate analysis (P<0.001; P=0.004; P=0.002). We then performed an exploratory analysis to evaluate the effect of the simultaneous presence of multiple adverse variant genotypes. Interestingly, patients with ⩾1 adverse genetic variants had a short survival, independently from their International Prognostic Scoring System (IPSS) and therapy received. To our knowledge, this is the first study showing that polymorphisms in folate-metabolizing pathway, DNA synthesis and DNA repair genes could influence survival of MDS patients.
Collapse
|
12
|
Wu B, Liu K, Yang JP, Hu Y, Zhang J, He JX. The association between methionine synthase A2756G polymorphism and hematological cancer: A meta-analysis. Medicine (Baltimore) 2017; 96:e7469. [PMID: 29310321 PMCID: PMC5728722 DOI: 10.1097/md.0000000000007469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Numerous studies have focused on the association of methionine synthase (MS) A2756G polymorphism and acute hematological cancer risk. However, the results remain inconsistent. Therefore, a meta-analysis was performed to derive a more precise estimate of the association between them. METHODS This meta-analysis involved 25 articles (26 studies) including 8641 hematological cancer patients and 15,498 controls. The pooled odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) of the association between MS A2756G polymorphism and the risk of hematological cancer were calculated. RESULTS Overall, no significant increased risks were found between MS A2756G polymorphism and hematological cancer risk under allelic homozygote (GA vs AA: OR = 0.98, 95% CI = 0.89-1.07, P = .62), heterozygote (GG vs AA: OR = 0.99, 95% CI = 0.85-1.15, P = .91), dominant (AG+GG vs AA: OR = 0.99, 95% CI = 0.90-1.08, P = .93), and recessive (GG vs AG+AA: OR = 1.00, 95% CI = 0.86-1.16, P = .97) models, respectively. In the stratified analyses by ethnicity and source of controls, there were still no significant associations between them in all genetic models. CONCLUSIONS Therefore, these findings demonstrate that MS A2756G polymorphism may not be a risk factor for hematological cancer.
Collapse
Affiliation(s)
- Bing Wu
- Tumor Treatment Center, Renmin Hospital of Wuhan University, Hubei
| | - Kang Liu
- Department of Radiotherapy, The First Affiliated Hospital of Guangxi Medical University, Guangxi
| | - Jun-Ping Yang
- State Key Laboratory of Oncology in South China and Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, People's Republic of China
| | - Yan Hu
- Tumor Treatment Center, Renmin Hospital of Wuhan University, Hubei
| | - Jun Zhang
- Tumor Treatment Center, Renmin Hospital of Wuhan University, Hubei
| | - Jun-xiang He
- Tumor Treatment Center, Renmin Hospital of Wuhan University, Hubei
| |
Collapse
|
13
|
Cantarella CD, Ragusa D, Giammanco M, Tosi S. Folate deficiency as predisposing factor for childhood leukaemia: a review of the literature. GENES & NUTRITION 2017; 12:14. [PMID: 28588742 PMCID: PMC5455200 DOI: 10.1186/s12263-017-0560-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/05/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Folic acid and its derivates, known as folates, are chemoprotective micronutrients of great interest because of their essential role in the maintenance of health and genomic integrity. The supplementation of folic acid during pregnancy has long been known to reduce the risk of neural tube defects (NTDs) in the foetus. Folate metabolism can be altered by many factors, including adequate intake through diet. Folate deficiency can compromise the synthesis, repair and methylation of DNA, with deleterious consequences on genomic stability and gene expression. These processes are known to be altered in chronic diseases, including cancer and cardiovascular diseases. MAIN BODY This review focuses on the association between folate intake and the risk of childhood leukaemia. Having compiled and analysed studies from the literature, we show the documented effects of folates on the genome and their role in cancer prevention and progression with particular emphasis on DNA methylation modifications. These changes are of crucial importance during pregnancy, as maternal diet has a profound impact on the metabolic and physiological functions of the foetus and the susceptibility to disease in later life. Folate deficiency is capable of modifying the methylation status of certain genes at birth in both animals and humans, with potential pathogenic and tumorigenic effects on the progeny. Pre-existing genetic polymorphisms can modify the metabolic network of folates and influence the risk of cancer, including childhood leukaemias. The protective effects of folic acid might be dose dependent, as excessive folic acid could have the adverse effect of nourishing certain types of tumours. CONCLUSION Overall, maternal folic acid supplementation before and during pregnancy seems to confer protection against the risk of childhood leukaemia in the offspring. The optimal folic acid requirements and supplementation doses need to be established, especially in conjunction with other vitamins in order to determine the most successful combinations of nutrients to maintain genomic health and wellbeing. Further research is therefore needed to uncover the role of maternal diet as a whole, as it represents a main factor capable of inducing permanent changes in the foetus.
Collapse
Affiliation(s)
- Catia Daniela Cantarella
- Department of Experimental Biomedicine and Clinical Neurosciences, University of Palermo, Palermo, Italy
| | - Denise Ragusa
- Division of Biosciences, College of Health and Life Sciences, Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| | - Marco Giammanco
- Department of Experimental Biomedicine and Clinical Neurosciences, University of Palermo, Palermo, Italy
| | - Sabrina Tosi
- Division of Biosciences, College of Health and Life Sciences, Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| |
Collapse
|
14
|
Gorelova V, Ambach L, Rébeillé F, Stove C, Van Der Straeten D. Folates in Plants: Research Advances and Progress in Crop Biofortification. Front Chem 2017; 5:21. [PMID: 28424769 PMCID: PMC5372827 DOI: 10.3389/fchem.2017.00021] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/09/2017] [Indexed: 11/13/2022] Open
Abstract
Folates, also known as B9 vitamins, serve as donors and acceptors in one-carbon (C1) transfer reactions. The latter are involved in synthesis of many important biomolecules, such as amino acids, nucleic acids and vitamin B5. Folates also play a central role in the methyl cycle that provides one-carbon groups for methylation reactions. The important functions fulfilled by folates make them essential in all living organisms. Plants, being able to synthesize folates de novo, serve as an excellent dietary source of folates for animals that lack the respective biosynthetic pathway. Unfortunately, the most important staple crops such as rice, potato and maize are rather poor sources of folates. Insufficient folate consumption is known to cause severe developmental disorders in humans. Two approaches are employed to fight folate deficiency: pharmacological supplementation in the form of folate pills and biofortification of staple crops. As the former approach is considered rather costly for the major part of the world population, biofortification of staple crops is viewed as a decent alternative in the struggle against folate deficiency. Therefore, strategies, challenges and recent progress of folate enhancement in plants will be addressed in this review. Apart from the ever-growing need for the enhancement of nutritional quality of crops, the world population faces climate change catastrophes or environmental stresses, such as elevated temperatures, drought, salinity that severely affect growth and productivity of crops. Due to immense diversity of their biochemical functions, folates take part in virtually every aspect of plant physiology. Any disturbance to the plant folate metabolism leads to severe growth inhibition and, as a consequence, to a lower productivity. Whereas today's knowledge of folate biochemistry can be considered very profound, evidence on the physiological roles of folates in plants only starts to emerge. In the current review we will discuss the implication of folates in various aspects of plant physiology and development.
Collapse
Affiliation(s)
- Vera Gorelova
- Laboratory of Functional Plant Biology, Department of Biology, Ghent UniversityGhent, Belgium
| | - Lars Ambach
- Laboratory of Toxicology, Department of Bioanalysis, Ghent UniversityGhent, Belgium
| | - Fabrice Rébeillé
- Laboratoire de Physiologie Cellulaire Végétale, Bioscience and Biotechnologies Institute of Grenoble, CEA-GrenobleGrenoble, France
| | - Christophe Stove
- Laboratory of Toxicology, Department of Bioanalysis, Ghent UniversityGhent, Belgium
| | | |
Collapse
|
15
|
Zhang B, Zhang W, Yan L, Wang D. The association between MTHFR gene C677T polymorphism and ALL risk based on a meta-analysis involving 17,469 subjects. Clin Chim Acta 2017; 466:85-92. [DOI: 10.1016/j.cca.2017.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 01/01/2017] [Accepted: 01/02/2017] [Indexed: 12/29/2022]
|
16
|
Wang P, Li S, Wang M, He J, Xi S. Association of MTRR A66G polymorphism with cancer susceptibility: Evidence from 85 studies. J Cancer 2017; 8:266-277. [PMID: 28243331 PMCID: PMC5327376 DOI: 10.7150/jca.17379] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 11/14/2016] [Indexed: 02/07/2023] Open
Abstract
Methionine synthase reductase (MTRR) is a key regulatory enzyme involved in the folate metabolic pathway. Previous studies investigating the association of MTRR A66G polymorphism with cancer susceptibility reported inconclusive results. We performed the current meta-analysis to obtain a more precise estimation of the possible association. Published literatures were identified from PubMed, Embase and CBM databases up to October 2016. The strength of the association between the MTRR A66G polymorphism and cancer susceptibility was assessed using odds ratios (ORs) and the corresponding 95% confidence intervals (CIs). Eighty five published studies with 32,272 cases and 37,427 controls were included in this meta-analysis. Pooled results indicated that the MTRR A66G polymorphism was associated with an increased overall cancer risk (homozygous model: OR = 1.08, 95% CI = 1.02-1.15, P = 0.009; recessive model: OR = 1.06, 95% CI = 1.00-1.12, P < 0.001 and allele comparison: OR = 1.03, 95% CI = 1.00-1.06, P < 0.001). Stratification analysis further indicated significant associations in head and neck cancer, Caucasians, Africans, and high quality studies. However, to avoid the "false-positive report", the significant findings were assessed by the false-positive report probability (FPRP) test. Interestingly, the results of FPRP test revealed that the increased risk for MTRR A66G polymorphism among Africans need further validation due to the high probabilities of false-positive results. This meta-analysis suggests that the MTRR A66G polymorphism is associated with significantly increased cancer risk, a finding that needs to be confirmed in single large studies.
Collapse
Affiliation(s)
- Ping Wang
- The Key Laboratory of Pharmacology and Medical Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang 471023, Henan, China
| | - Sanqiang Li
- The Molecular Medicine Key Laboratory of Liver Injury and Repair, Medical College, Henan University of Science and Technology, Luoyang 471023, Henan, China
| | - Meilin Wang
- The Key Laboratory of Pharmacology and Medical Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang 471023, Henan, China
| | - Jing He
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
- ✉ Corresponding authors: Shoumin Xi, The Key Laboratory of Pharmacology and Medical Molecular Biology, Medical College, Henan University of Science and Technology, No. 263 Kaiyuan Avenue, Luoyang 471023, Henan, China, Tel.: (+86-379) 64830346, Fax: (+86-379) 64830345, E-mail: ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China, Tel./Fax: (+86-20) 38076560, E-mail:
| | - Shoumin Xi
- The Key Laboratory of Pharmacology and Medical Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang 471023, Henan, China
- ✉ Corresponding authors: Shoumin Xi, The Key Laboratory of Pharmacology and Medical Molecular Biology, Medical College, Henan University of Science and Technology, No. 263 Kaiyuan Avenue, Luoyang 471023, Henan, China, Tel.: (+86-379) 64830346, Fax: (+86-379) 64830345, E-mail: ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China, Tel./Fax: (+86-20) 38076560, E-mail:
| |
Collapse
|
17
|
Polymorphisms of 5,10-methylenetetrahydrofolate reductase and thymidylate synthase, dietary folate intake, and the risk of leukemia in adults. Tumour Biol 2015; 37:3265-75. [PMID: 26438060 DOI: 10.1007/s13277-015-4168-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 09/27/2015] [Indexed: 01/12/2023] Open
Abstract
The 5,10-methylenetetrahydrofolate reductase (MTHFR) and thymidylate synthase (TS) are critical enzymes in folate metabolism. Previous studies have reported conflicting results on the associations between MTHFR/TS polymorphisms and adult leukemia risk, which may due to the lack of information on folate intake. We investigated the risks of adult leukemia with genetic polymorphisms of folate metabolic enzymes (MTHFR C677T, A1298C, and TS) and evaluated if the associations varied by dietary folate intake from a multicenter case-control study conducted in Chinese. This study comprised 442 incident adult leukemia cases and 442 outpatient controls, individually matched to cases by gender, birth quinquennium, and study site. Genotypes were determined by a polymerase chain reaction (PCR) or PCR-based restriction fragment length polymorphism assay. Dietary folate intake was assessed by face-to-face interviews using a validated food-frequency questionnaire. The MTHFR 677TT genotype conferred a significant higher risk of leukemia in males than in females and exhibited an increased risk of acute myeloid leukemia (AML) but a decreased risk of acute lymphoblastic leukemia (ALL). The MTHFR 1298AC genotype appeared to decrease the risks of leukemia in both genders, in AML and ALL. Stratified analysis by dietary folate intake showed the increased risks of leukemia with the MTHFR 677TT and TS 2R3R/2R2R genotypes were only significant in individuals with low folate intake. A significant interaction between TS polymorphism and dietary folate intake was observed (P = 0.03). This study suggests that dietary folate intake and gender may modify the associations between MTHFR/TS polymorphisms and adult leukemia risk.
Collapse
|
18
|
Huang L, Deng D, Peng Z, Ye F, Xiao Q, Zhang B, Ye B, Mo Z, Yang X, Liu Z. Polymorphisms in the methylenetetrahydrofolate reductase gene (MTHFR) are associated with susceptibility to adult acute myeloid leukemia in a Chinese population. Cancer Epidemiol 2015; 39:328-33. [PMID: 25887077 DOI: 10.1016/j.canep.2015.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/14/2015] [Accepted: 02/18/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Methylenetetrahydrofolate reductase (MTHFR) is an essential enzyme in the metabolism of folate. Since acute myeloid leukemia (AML) is characterized by rapidly proliferating tissues that have a high requirement for DNA synthesis, it is possible that the presence of MTHFR polymorphisms could be linked to the multifactorial process of AML development. METHODS We evaluated the role of MTHFR C677T and A1298C polymorphisms in a case-control study comprising 98 AML patients and 2016 healthy controls in a Southern Chinese population. We further conducted a sub-study restricted to individuals who neither smoked nor drank alcohol (70 AML patients and 160 healthy controls). MTHFR polymorphisms in the patient and control groups were evaluated by SNaP shot genotype techniques and Illumina BeadChip, respectively. Logistic regression was used to assess the adjusted odds ratios (ORs) and 95% confidence intervals (95% CIs). RESULTS The MTHFR 1298AC genotype and the 677CC/1298AC haplotype were significantly associated with a decreased risk of AML compared with the AA genotype and 677CC/1298AA haplotype (OR=0.60, 95% CI: 0.38-0.95, P=0.03; OR=0.49, 95% CI: 0.27-0.90, P=0.02, respectively). In addition, the 677TT genotype was significantly associated with an increased risk of AML compared with the AA genotype only in non-smokers and non-drinkers (OR=4.78; 95% CI=1.38-16.61, P=0.01). CONCLUSIONS The results might suggest that MTHFR polymorphisms are significantly associated with AML risk. In addition, the role of MTHFR genetic susceptibility could be greater among non-smokers and non-drinkers.
Collapse
Affiliation(s)
- Lulu Huang
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Donghong Deng
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Zhigang Peng
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Fanghui Ye
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Qiang Xiao
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China; Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Bing Zhang
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Bingbing Ye
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Zengnan Mo
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, China; Institute of Urology and Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaobo Yang
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, China; Department of Occupational Health and Environmental Health, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhenfang Liu
- Hematology Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.
| |
Collapse
|
19
|
Li SY, Ye JY, Liang EY, Zhou LX, Yang M. Association between MTHFR C677T polymorphism and risk of acute lymphoblastic leukemia: a meta-analysis based on 51 case-control studies. Med Sci Monit 2015; 21:740-8. [PMID: 25761797 PMCID: PMC4368066 DOI: 10.12659/msm.892835] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background Studies and systematic reviews have reached inconsistent conclusions on the role of 5, 10-methylenetetrahydrofolate reductase (MTHFR) polymorphism C677T in acute lymphoblastic leukemia (ALL) risk. Material/Methods The present meta-analysis comprising of 51 case-control studies, including 7892 cases and 14 280 controls was performed to reevaluate the association between MTHFR C677T polymorphism and ALL risk. Results Statistical differences were found in the dominant model (TT+CT vs. CC, odd ratio (OR)=0.89, 95% CI, 0.79–1.00, P=0.04) and the CT vs. CC (OR=0.89, 95% CI, 0.80–1.00, P=0.05), but not in the allele contrast model (T vs. C, OR=0.92, 95% CI, 0.84–1.01, P=0.08), additive model (TT vs. CC, OR=0.87, 95% CI, 0.73–1.05, P=0.15), or recessive model (TT vs. CT+CC, OR=0.94, 95% CI, 0.81–1.10, P=0.44) in overall populations. In the subgroup analyses stratified by age (children and adults) and ethnicity (Asian and Caucasian), no significant associations between MTHFR C677T polymorphism and ALL risk were observed. Conclusions The current study found no sufficient evidence of a protective role of MTHFR C677T polymorphism in ALL susceptibility.
Collapse
Affiliation(s)
- Su-yi Li
- Laboratory of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
| | - Jie-yu Ye
- Laboratory of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
| | - En-yu Liang
- Laboratory of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
| | - Li-xia Zhou
- Laboratory of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
| | - Mo Yang
- Laboratory of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
| |
Collapse
|
20
|
Bănescu C, Iancu M, Trifa AP, Macarie I, Dima D, Dobreanu M. The methylenetetrahydrofolate reductase (MTHFR) 677 C>T polymorphism increases the risk of developing chronic myeloid leukemia-a case-control study. Tumour Biol 2014; 36:3101-7. [PMID: 25510667 DOI: 10.1007/s13277-014-2946-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 12/04/2014] [Indexed: 01/10/2023] Open
Abstract
The methylenetetrahydrofolate reductase (MTHFR) 677 C>T and 1298 A>C polymorphisms are associated with variations in folate levels, a phenomenon linked to the development of various malignancies. The aim of this study was to investigate the influence of the 677 C>T and 1298 A>C polymorphisms in the MTHFR gene on the risk of developing chronic myeloid leukemia (CML). Our study included 151 patients with CML and 305 controls. The MTHFR 677 C>T and 1298 A>C polymorphisms were investigated by polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) and allele-specific PCR techniques. The CT and TT genotypes of the MTHFR 677 C>T polymorphism were associated with an increased risk of developing CML (odds ratio (OR) = 1.556, 95% confidence interval (CI) = 1.017-2.381, p value = 0.041, and OR = 1.897, 95% CI = 1.046-3.44, p value = 0.035, respectively). No association was observed between the prognostic factors (blasts, basophils, additional chromosomal abnormalities, EUTOS score, Sokal and Hasford risk groups) and the MTHFR 677 C>T and 1298 A>C variant genotypes in CML patients. Our study shows that the MTHFR 677 C>T polymorphism is significantly associated with the risk of CML in Romanian patients.
Collapse
Affiliation(s)
- Claudia Bănescu
- Department of Medical Genetics, University of Medicine and Pharmacy, Tirgu Mures, Romania
| | | | | | | | | | | |
Collapse
|
21
|
Dunna NR, Naushad SM, Vuree S, Anuradha C, Sailaja K, Surekha D, Rao DR, Vishnupriya S. Association of thymidylate synthase 5'-UTR 28bp tandem repeat and serine hydroxymethyltransfarase C1420T polymorphisms with susceptibility to acute leukemia. Asian Pac J Cancer Prev 2014; 15:1719-23. [PMID: 24641398 DOI: 10.7314/apjcp.2014.15.4.1719] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The current study was aimed to elucidate the association of thymidylate synthase (TYMS) 5'- UTR 28bp tandem repeat and cytosolic serine hydroxymethyltransferase (cSHMT) C1420T polymorphisms with acute leukemia in South Indian subjects. A total of 812 subjects [523 healthy controls, 148 acute lymphoblastic leukemia (ALL) cases and 141 acute myeloid leukemia (AML) cases] were screened for TYMS 5'-UTR 28bp tandem repeat and cSHMT C1420T using PCR-AFLP and PCR-with confronting two-pair primers (CTPP) approaches. TYMS 5'-UTR 2R allele frequencies of controls, ALL and AML cases were 35.3%, 28.0% and 30.1% respectively. This polymorphism conferred protection against ALL (OR: 0.71, 95%CI: 0.53-0.96) while showing no statistically significant association with AML (OR: 0.79, 95%CI: 0.58, 1.07). The cSHMT variant allele (T-) frequencies of ALL and AML cases (6.42% and 5.68% respectively) were significantly lower compared to controls (58.3%). This polymorphism conferred protection against ALL (OR: 0.049, 95%CI: 0.029-0.081) and AML (OR: 0.043, 95%CI: 0.025-0.074). The TYMS 5'-UTR 2R2R genotype was associated with a lower total leukocyte count, smaller percentage of blasts, and more adequate platelet count compared to 2R3R and 3R3R genotypes in ALL cases. No such genotype-dependent differences were observed in AML cases. ALL cases carrying the cSHMT C1420T polymorphism showed higher disease free survival compared to those with the wild genotype. To conclude, the TYMS 5'-UTR 28bp tandem repeat reduces risk for ALL while cSHMT C1420T reduces risk for both ALL and AML. Both also influence disease progression in ALL.
Collapse
Affiliation(s)
- Nageswara Rao Dunna
- School of Chemical and Biotechnology, SASTRA University, Thanjavur, India E-mail :
| | | | | | | | | | | | | | | |
Collapse
|
22
|
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.
Collapse
|
23
|
Tang M, Wang SQ, Liu BJ, Cao Q, Li BJ, Li PC, Li YF, Qin C, Zhang W. The methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism and tumor risk: evidence from 134 case-control studies. Mol Biol Rep 2014; 41:4659-73. [PMID: 24744129 DOI: 10.1007/s11033-014-3337-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 11/14/2013] [Indexed: 12/12/2022]
Abstract
Methylenetetrahydrofolate reductase (MTHFR) is an important enzyme involved in folate metabolism, which is essential for DNA synthesis and methylation. Genetic variations in the MTHFR gene seem to contribute to a decreased activity of MTHFR, ultimately confer increased susceptibility to cancer. As the most extensively studied polymorphism, MTHFR C677T polymorphism was shown to contribute to cancer susceptibility but the results were inconsistent. The authors performed a meta-analysis including 134 studies (46,207 cases and 69,160 controls) to address the issue. Odds ratios (ORs) with corresponding 95% confidence intervals (CIs) were used to assess the association. Overall, a significant elevated risk of cancer was associated with the MTHFR C677T polymorphism in T-allele versus C-allele comparison (OR = 1.06, 95% CI 1.02-1.11, P(heterogeneity) < 0.001), homozygote model (OR = 1.08, 95% CI 1.01-1.17, P(heterogeneity) < 0.001) and dominant model (OR = 1.05, 95% CI 1.00-1.10, P(heterogeneity) < 0.001). In the stratified analyses, significantly increased cancer risks were indicated among Asians in all genetic models except for heterozygote model. Further analysis revealed that C677T was significantly associated with an increased risk of esophageal and stomach cancer. This meta-analysis supports an association between the MTHFR C677T polymorphism and increased risk of esophageal and stomach cancer, especially among Asians. Additionally, more high-quality studies and that the covariates responsible for heterogeneity should be controlled to obtain a more conclusive response about the function of MTHFR C677T in cancer.
Collapse
Affiliation(s)
- Min Tang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Qin YT, Zhang Y, Wu F, Su Y, Lu GN, Wang RS. Association between MTHFR polymorphisms and acute myeloid leukemia risk: a meta-analysis. PLoS One 2014; 9:e88823. [PMID: 24586405 PMCID: PMC3930602 DOI: 10.1371/journal.pone.0088823] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 01/10/2014] [Indexed: 11/18/2022] Open
Abstract
Previous observational studies investigating the association between methylenetetrahydrofolate reductase (MTHFR) polymorphisms and acute myeloid leukemia risk (AML) have yielded inconsistent results. The aim of this study is to derive a more precise estimation of the association between MTHFR (C677T and A1298C) polymorphisms and acute myeloid leukemia risk. PubMed and Embase databases were systematically searched to identify relevant studies from their inception to August 2013. Odds ratios (ORs) with 95% confidence intervals (CIs) were the metric of choice. Thirteen studies were selected for C677T polymorphism (1838 cases and 5318 controls) and 9 studies (1335 patients and 4295 controls) for A1298C polymorphism. Overall, pooled results showed that C677T polymorphism was not significant associated with AML risk(OR, 0.98-1.04; 95% CI, 0.86-0.92 to 1.09-1.25). Similar results were observed for the A1298C polymorphism and in subgroup analysis. All comparisons revealed no substantial heterogeneity nor did we detect evidence of publication bias. In summary, this meta-analysis provides evidence that MTHFR polymorphisms were not associated with AML risk. Further investigations are needed to offer better insight into the role of these polymorphisms in AML carcinogenesis.
Collapse
Affiliation(s)
- Yu-Tao Qin
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Yong Zhang
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Fang Wu
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Yan Su
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Ge-Ning Lu
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Ren-Sheng Wang
- Department of Radiotherapy, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
- * E-mail:
| |
Collapse
|
25
|
Kweon SS, Shin MH, Kim HN, Kim SH, Kang HC. Polymorphisms of methylenetetrahydrofolate reductase and glutathione S-transferase are not associated with the risk of papillary thyroid cancer in Korean population. Mol Biol Rep 2014; 41:3793-9. [PMID: 24535271 DOI: 10.1007/s11033-014-3245-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 02/07/2014] [Indexed: 01/23/2023]
Abstract
Korea has the highest incidence of thyroid cancer of any nation. We conducted a population-based, case-control study of the association between the risk of papillary thyroid cancer (PTC) in the Korean population and polymorphisms of methylenetetrahydrofolate reductase (MTHFR) C677T, glutathione S-transferase class mu (GSTM1), and glutathione S-transferase class theta (GSTT1). The study subjects consisted of 2,194 newly diagnosed PTC cases and 1,669 population-based healthy controls. Odds ratios adjusted by age, sex, body mass index, smoking, drinking, serum thyroid-stimulating hormone level, family history of thyroid cancer, and previous history of thyroid disease, with 95% confidence intervals, were estimated using logistic regression analysis. The frequencies of MTHFR 677TT genotypes, and null genotypes of GSTM1 and GSTT1 were 19.2, 56.8, and 51.4% among PTC cases and 17.4, 54.1, and 50.6% among the controls, respectively. No significant associations between PTC and TT genotypes of MTHFR C677T, null genotypes of GSTM1 and GSTT1, or double-null (GSTM1-GSTT1) genotypes were found. These findings suggest that polymorphisms of the MTHFR C677T, GSTM1 and GSTT1 genotypes do not contribute to the development of PTC susceptibility in the Korean population.
Collapse
Affiliation(s)
- Sun-Seog Kweon
- Department of Preventive Medicine, Chonnam National University Medical School, 160 Baekseok-ro, Dong-gu, Gwangju, 501-746, South Korea
| | | | | | | | | |
Collapse
|
26
|
Fang DH, Ji Q, Fan CH, An Q, Li J. Methionine synthase reductase A66G polymorphism and leukemia risk: evidence from published studies. Leuk Lymphoma 2014; 55:1910-4. [PMID: 24261678 DOI: 10.3109/10428194.2013.867492] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Methionine synthase reductase (MTRR) is required for the reductive methylation of cobalamin, which is the functional cofactorial form of methionine synthase (MS) in the remethylation of homocysteine to methionine. The MTRR A66G (rs1801394) polymorphism is found to be associated with decreased enzyme affinity for MTR, the gene that encodes MS, and has been widely investigated for cancer risk, including leukemia. However, the conclusions of epidemiological studies have always been contradictory. To further clarify the association of MTRR A66G polymorphism with the risk of leukemia, this meta-analysis was performed for 2913 cases and 4764 controls. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of associations. Pooled ORs were determined for the co-dominant model (GG vs. AA, AG vs. AA), dominant model (GG + AG vs. AA) and recessive model (GG vs. AA+ AG), respectively. No significant associations were found for all comparisons in the overall pooled analysis. However, the results of stratified analyses revealed that MTRR A66G GG genotype was associated with decreased leukemia risk in the Caucasian population, in children and for acute lymphoblastic leukemia (ALL). In contrast, increased risk was observed in the Asian population and for acute myeloid leukemia (AML). This meta-analysis suggests that MTRR A66G GG is associated with decreased risk of leukemia in a Caucasian population and in children, especially for ALL.
Collapse
Affiliation(s)
- Dai-Hua Fang
- Central Laboratory, Xuzhou Children's Hospital , Xuzhou, Jiangsu Province , China
| | | | | | | | | |
Collapse
|
27
|
Nazki FH, Sameer AS, Ganaie BA. Folate: Metabolism, genes, polymorphisms and the associated diseases. Gene 2014; 533:11-20. [DOI: 10.1016/j.gene.2013.09.063] [Citation(s) in RCA: 206] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 08/19/2013] [Accepted: 09/17/2013] [Indexed: 12/22/2022]
|
28
|
MTHFR genetic polymorphisms may contribute to the risk of chronic myelogenous leukemia in adults: a meta-analysis of 12 genetic association studies. Tumour Biol 2013; 35:4233-45. [DOI: 10.1007/s13277-013-1554-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 12/13/2013] [Indexed: 01/11/2023] Open
|
29
|
Jiang Y, Hou J, Zhang Q, Jia ST, Wang BY, Zhang JH, Tang WR, Luo Y. The MTHFR C677T Polymorphism and Risk of Acute Lymphoblastic Leukemia: an Updated Meta-analysis Based on 37 Case-control Studies. Asian Pac J Cancer Prev 2013; 14:6357-62. [DOI: 10.7314/apjcp.2013.14.11.6357] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
30
|
Yamamura Y, Oum R, Gbito KYE, Garcia-Manero G, Strom SS. Dietary intake of vegetables, fruits, and meats/beans as potential risk factors of acute myeloid leukemia: a Texas case-control study. Nutr Cancer 2013; 65:1132-40. [PMID: 24168094 DOI: 10.1080/01635581.2013.834946] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Diet has been identified as a risk factor for some cancers, but its role in adult de novo acute myeloid leukemia (AML) is unclear. This study was conducted at the University of Texas MD Anderson Cancer Center to evaluate associations between consumption of vegetables, fruits, and meats with AML risk among Texas residents. All participants, 323 adult de novo AML cases and 380 frequency-matched controls, completed demographic and food frequency questionnaires. Overall, AML risk was significantly decreased among those who consumed the most dark green vegetables, seafood, and nuts/seeds; and it was significantly increased among greatest consumers of red meat. Among men, AML risk was lowest among those whose consumption was in the highest quartile for fruits [odds ratio (OR) = 0.25, 95% confidence interval (CI) = 0.10-0.69], poultry (OR = 0.28, 95%CI = 0.10-0.78), and seafood (OR = 0.39, 95%CI = 0.16-0.96) compared to those in the lowest. Among women, risk was lowest among those whose consumption was in the highest quartile of dark-green vegetables (OR = 0.28, 95%CI = 0.12-.68), orange vegetables (OR = 0.40, 95%CI = 0.17-.96) and nuts/beans (OR = 0.26, 95%CI = 0.11-0.60). Based on these findings, interventions can be developed to modify intake of specific dietary components to reduce cancer risk.
Collapse
Affiliation(s)
- Yuko Yamamura
- a Department of Epidemiology , The University of Texas M. D. Anderson Cancer Center , Houston , Texas , USA
| | | | | | | | | |
Collapse
|
31
|
Xia J, Wang Y, Zhang H, Hu Y. Association betweenMTR A2756Gpolymorphism and childhood acute lymphoblastic leukemia: a meta-analysis. Leuk Lymphoma 2013; 55:1388-93. [DOI: 10.3109/10428194.2013.830304] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
32
|
Hong W, Wang K, Zhang YP, Kou JY, Hong D, Su D, Mao WM, Yu XM, Xie FJ, Wang XJ. Methylenetetrahydrofolate reductase C677T polymorphism predicts response and time to progression to gemcitabine-based chemotherapy for advanced non-small cell lung cancer in a Chinese Han population. J Zhejiang Univ Sci B 2013; 14:207-15. [PMID: 23463763 DOI: 10.1631/jzus.b1200101] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the association between the methylenetetrahydrofolate reductase (MTHFR) C677T excision repair cross-complementation group 1 (ERCC1) genetic polymorphisms and the clinical efficacy of gemcitabine-based chemotherapy in advanced non-small cell lung cancer (NSCLC). METHODS A total of 135 chemonaive patients with unresectable advanced NSCLC were treated with gemcitabine/platinum regimens. The polymorphisms of MTHFR C677T, ERCC1 C8092A, and ERCC1 C118T were genotyped using the TaqMan methods. RESULTS The overall response rate was 28.9%. Patients with MTHFR CC genotype had a higher rate of objective response than patients with variant genotype (TT or CT) (41.2% versus 19.1%, P=0.01). Median time to progression (TTP) of patients with MTHFR CC genotype was longer than that of patients with variant genotype (7.6 months versus 5.0 months, P=0.003). No significant associations were obtained between ERCC1 C118T and C8092A polymorphisms and both response and survival. CONCLUSIONS Our data suggest the value of MTHFR C677T polymorphism as a possible predictive marker of response and TTP in advanced NSCLC patients treated with gemcitabine/platinum.
Collapse
Affiliation(s)
- Wei Hong
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
MTHFR Gene Polymorphisms and the Risk of Acute Lymphoblastic Leukemia in Adults and Children: A Case Control Study in India. Indian J Hematol Blood Transfus 2013; 30:219-25. [PMID: 25435717 DOI: 10.1007/s12288-013-0295-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 08/17/2013] [Indexed: 12/21/2022] Open
Abstract
Genetic polymorphisms in the methylene tetrahydrofolate reductase (MTHFR) gene have been associated with the development of acute leukemias and various malignancies. The role of MTHFR polymorphism in the development of pediatric acute lymphoblastic leukemia (ALL) has been extensively studied among north Indians in various settings, yet its association with acute leukemias remains unresolved. To evaluate the relationship between functional MTHFR polymorphisms, C677T and A1298C and possible effect on risk of ALL in adults and children in North Indian population by comparing them with healthy controls. DNA was isolated from peripheral blood of 184 ALL patients (33 adults, 151 children) and 155 controls and analyzed by a PCR-restriction fragment length polymorphism assay. The frequency of MTHFR 677CT and 1298 AC genotypes were significantly lower among adult ALL cases when compared to the controls. We found a 1.74-fold reduced risk of ALL in individuals with 1298AC polymorphic variant and a 9.17-fold decreased risk of adult ALL. However, no statistically significant difference was evident between the above polymorphisms and susceptibility to ALL in children. Polymorphisms in the MTHFR gene possibly modulate risk of ALL in north Indian adults but not in children, although larger studies are needed.
Collapse
|
34
|
D’Angelo V, Ramaglia M, Iannotta A, Francese M, Pota E, Affinita MC, Pecoraro G, Indolfi C, Di Martino M, Di Pinto D, Buffardi S, Poggi V, Indolfi P, Casale F. Influence of methylenetetrahydrofolate reductase gene polymorphisms on the outcome of pediatric patients with non-Hodgkin lymphoma treated with high-dose methotrexate. Leuk Lymphoma 2013; 54:2639-44. [DOI: 10.3109/10428194.2013.784758] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
35
|
Erratum: The association between two polymorphisms in the TS gene and risk of cancer: A systematic review and pooled analysis. Int J Cancer 2013. [DOI: 10.1002/ijc.27998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
36
|
Silva RMS, Fontes ACL, Silva KA, Sant'Ana TA, Ramos FJDC, Marques-Salles TDJ, Pombo-de-Oliveira MS, Muniz MTC. Polymorphisms Involved in Folate Metabolism Pathways and the Risk of the Development of Childhood Acute Leukemia. Genet Test Mol Biomarkers 2013; 17:147-52. [DOI: 10.1089/gtmb.2012.0174] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Rafaela Maria Seabra Silva
- Departamento de Genética, Universidade Federal de Pernambuco, Recife, Brazil
- Centro de Onco-Hematologia, Hospital Universitário Oswaldo Cruz, Recife, Brazil
| | - Alide Caroline Lima Fontes
- Centro de Onco-Hematologia, Hospital Universitário Oswaldo Cruz, Recife, Brazil
- Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, Brazil
| | - Karina Alves Silva
- Centro de Onco-Hematologia, Hospital Universitário Oswaldo Cruz, Recife, Brazil
| | - Thalita Araújo Sant'Ana
- Centro de Onco-Hematologia, Hospital Universitário Oswaldo Cruz, Recife, Brazil
- Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, Brazil
| | | | | | | | - Maria Tereza Cartaxo Muniz
- Departamento de Genética, Universidade Federal de Pernambuco, Recife, Brazil
- Centro de Onco-Hematologia, Hospital Universitário Oswaldo Cruz, Recife, Brazil
- Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, Brazil
| |
Collapse
|
37
|
Belickova M, Merkerova MD, Stara E, Vesela J, Sponerova D, Mikulenkova D, Brdicka R, Neuwirtova R, Jonasova A, Cermak J. DNA repair gene variants are associated with an increased risk of myelodysplastic syndromes in a Czech population. J Hematol Oncol 2013; 6:9. [PMID: 23339595 PMCID: PMC3556100 DOI: 10.1186/1756-8722-6-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 01/17/2013] [Indexed: 01/18/2023] Open
Abstract
Background Interactions between genetic variants and risk factors in myelodysplastic syndromes are poorly understood. In this case–control study, we analyzed 1 421 single nucleotide polymorphisms in 408 genes involved in cancer-related pathways in 198 patients and 292 controls. Methods The Illumina SNP Cancer Panel was used for genotyping of samples. The chi-squared, p-values, odds ratios and upper and lower limits of the 95% confidence interval were calculated for all the SNPs that passed the quality control filtering. Results Gene-based analysis showed nine candidate single nucleotide polymorphisms significantly associated with the disease susceptibility (q-value < 0.05). Four of these polymorphisms were located in oxidative damage/DNA repair genes (LIG1, RAD52, MSH3 and GPX3), which may play important roles in the pathobiology of myelodysplastic syndromes. Two of nine candidate polymorphisms were located in transmembrane transporters (ABCB1 and SLC4A2), contributing to individual variability in drug responses and patient prognoses. Moreover, the variations in the ROS1 and STK6 genes were associated with the overall survival of patients. Conclusions Our association study identified genetic variants in Czech population that may serve as potential markers for myelodysplastic syndromes.
Collapse
Affiliation(s)
- Monika Belickova
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, Prague, Czech Republic.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Izmirli M. A literature review of MTHFR (C677T and A1298C polymorphisms) and cancer risk. Mol Biol Rep 2012; 40:625-37. [PMID: 23076526 DOI: 10.1007/s11033-012-2101-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 10/03/2012] [Indexed: 12/18/2022]
Abstract
5,10-Methlenetetrahydrofolate reductase (MTHFR) is one of the most important enzymes for folate metabolism. This enzyme is mapped on chromosome 1, which is located at the end of the short arm (1p36.3). The C677T and A1298C are MTHFR polymorphisms that decrease in vitro MTHFR enzyme activity. Folate metabolism plays a key role in cell metabolism. These reactions are associated with purine-pyrimidine synthesis: DNA, RNA, and protein methylation. Polymorphism is also a factor in biodiversity, and be affected by ethnic heritage and geographic locale. In the case of unknown outcomes, not only should all geographical regions be investigated to ascertain biodiversity, but all populations as well to fully understand the variations in the effect. PUBMED was searched from January 2006 to December 2011 to develop an investigatory pursuit strategy. MTHFR, cancer, C677T, A1298C, and polymorphisms were key words used to focus the search. The literature review included all published relevant cancer types and MTHFR polymorphisms for that 5 years period. All selected polymorphisms data for cancer types was listed in tables for easy access and retrieval.
Collapse
Affiliation(s)
- Muzeyyen Izmirli
- Department of Medical Biology, Faculty of Medicine, Bezmialem Vakif University, 34093 Istanbul, Turkey.
| |
Collapse
|
39
|
Wang H, Wang J, Zhao L, Liu X, Mi W. Methylenetetrahydrofolate reductase polymorphisms and risk of acute lymphoblastic leukemia-evidence from an updated meta-analysis including 35 studies. BMC MEDICAL GENETICS 2012; 13:77. [PMID: 22943282 PMCID: PMC3459788 DOI: 10.1186/1471-2350-13-77] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 08/27/2012] [Indexed: 11/25/2022]
Abstract
Background 5,10-methylenetetrahydrofolate reductase (MTHFR) variants, C677T and A1298C, have been reported to be associated with decreased risk of acute lymphoblastic leukemia (ALL). However, results derived from individually underpowered studies are conflicting. We carried out an updated meta-analysis on the association between MTHFR polymorphisms and ALL risk. Methods Relevant publications were searched through PUBMED and EMBASE databases. The associations between MTHFR C677T and A1298C polymorphisms and the risk of ALL were evaluated by odds ratios (ORs). The heterogeneity and publication bias were estimated. Meta-regression analysis was performed to evaluate the potential sources of heterogeneity. Results C677T polymorphism was associated with a reduced risk of ALL (allele contrast: ORRE = 0.91, 95% CI: 0.83-0.99). Subgroup analysis showed MTHFR C677T variant was associated with decreased susceptibility to ALL in children and Caucasians. Meta-regression showed the logOR for the association between T allele and ALL increased as sex ratio (M/F) in the case group increased (P = 0.01). Regarding A1298C polymorphism, no significant association was observed (allele contrast: ORRE = 1.01, 95% CI: 0.91-1.11). There was no publication bias for C677T or A1298C polymorphism. Conclusions The present meta-analysis suggests that the C677T polymorphism, not A1298C, in MTHFR gene is associated with a decreased risk of ALL, particularly among children and Caucasians subjects. Our findings suggest that the influence of the C677T polymorphism on ALL susceptibility is modified by sex ratio in cases (M/F). Since folate intake may be a possible confounding factor, including this factor in future prospective studies is warranted. Further meta-analysis studies should be at least stratified for folate levels and gender to give more powerful and informative results.
Collapse
Affiliation(s)
- Haigang Wang
- Pharmacy Intravenous Admixture Services, Qilu Hospital, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China
| | | | | | | | | |
Collapse
|
40
|
Zhou JY, Shi R, Yu HL, Zeng Y, Zheng WL, Ma WL. Thymidylate synthase polymorphisms and hematological cancer risk: evidence needs further clarification. Leuk Lymphoma 2012; 53:1842-4. [DOI: 10.3109/10428194.2012.666544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
41
|
Yan J, Yin M, Dreyer ZE, Scheurer ME, Kamdar K, Wei Q, Okcu MF. A meta-analysis of MTHFR C677T and A1298C polymorphisms and risk of acute lymphoblastic leukemia in children. Pediatr Blood Cancer 2012; 58:513-8. [PMID: 21495160 DOI: 10.1002/pbc.23137] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Accepted: 03/01/2011] [Indexed: 11/10/2022]
Abstract
BACKGROUND Methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms have been implicated in childhood acute lymphoblastic leukemia (ALL) risk, but previously published studies were inconsistent and recent meta-analyses were not adequate. PROCEDURES In a meta-analysis of 21 publications with 4,706 cases and 7,414 controls, we used more stringent inclusion method and summarized data on associations between MTHFR C677T and A1298C polymorphisms and childhood ALL risk. RESULTS We found an overall association between 677T variant genotypes and reduced childhood ALL risk. Specifically, in the dominant genetic model, an association was found in a fixed-effect (TT + CT vs. CC: OR = 0.92; 95% CI = 0.85-0.99) but not random-effect model, whereas such an association was observed in both homozygote genetic model (TT vs. CC: OR = 0.80; 95% CI = 0.70-0.93 by fixed effects and OR = 0.78; 95% CI = 0.65-0.93 by random effects) and recessive genetic model (TT vs. CC + CT: OR = 0.83; 95% CI = 0.72-0.95 by fixed effects and OR = 0.84; 95% CI = 0.73-0.97 by random effects). These associations were also observed in subgroups by ethnicity: for Asians in all models except for the dominant genetic model by random effect and for Caucasians in all models except for the recessive genetic model. However, the A1298C polymorphism did not appear to have an effect on childhood ALL risk. CONCLUSIONS These results suggest that the MTHFR C677T, but not A1298C, polymorphism is a potential biomarker for childhood ALL risk.
Collapse
Affiliation(s)
- Jingrong Yan
- Department of Pediatrics, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas 77030, USA
| | | | | | | | | | | | | |
Collapse
|
42
|
Weng Y, Zhang J, Tang X, Xie X, Chen G. Thymidylate synthase polymorphisms and hematological cancer risk: a meta-analysis. Leuk Lymphoma 2012; 53:1345-51. [PMID: 22166040 DOI: 10.3109/10428194.2011.649477] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Previous studies on the association of Thymidylate synthase (TYMS) polymorphisms with risk of hematological malignancies have produced conflicting results. The purpose of this meta-analysis was to define the effect of TYMS 5'-untranslated enhanced region (TSER) and 3'-untranslated region (TS3'-UTR) polymorphisms on the risk of hematological malignancies. Seventeen articles were identified as eligible in the case of TSER (2R > 3R) polymorphism (4511 cases and 6113 controls) and seven articles in the case of TS3'-UTR (1494del6) polymorphism (2721 cases and 3761 controls). The overall results suggested that either TSER or TS3'-UTR polymorphism was not associated with the risk of hematological malignancies. In stratified analyses, significantly decreased acute lymphoblastic leukemia (ALL) risk was found in adults (2R/3R vs. 2R/2R: odds ratio [OR] = 0.64, 95% confidence interval [CI]: 0.43-0.97), but increased ALL risk was observed in children (3R/3R vs. 2R/2R: OR = 1.46, 95% CI: 1.03-2.06). Increased non-Hodgkin lymphoma risk was found in the Caucasian population (2R/3R vs. 2R/2R: OR = 1.31, 95% CI: 1.10-1.56). Protective effects of the TS3'-UTR polymorphism (-6 bp/-6 bp) on hematological malignancies were found in a homozygote model and recessive model when the source of controls was stratified as hospital based. In conclusion, the TYMS TSER polymorphism may contribute to a susceptibility to risk of ALL in children and non-Hodgkin lymphoma in Caucasians, but protection from ALL risk in adults. The TS3'-UTR polymorphism (-6 bp/-6 bp) may have a protective effect in hematological malignancies.
Collapse
Affiliation(s)
- Yu Weng
- Department of Clinical Laboratory, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | | | | | | | | |
Collapse
|
43
|
Azhar MR, Rahimi Z, Vaisi-Raygani A, Akramipour R, Madani H, Rahimi Z, Parsian A. Lack of association between MTHFR C677T and A1298C polymorphisms and risk of childhood acute lymphoblastic leukemia in the Kurdish population from Western Iran. Genet Test Mol Biomarkers 2011; 16:198-202. [PMID: 22017305 DOI: 10.1089/gtmb.2011.0041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
AIMS Polymorphism in genes involved in folate metabolism may influence the susceptibility to acute lymphoblastic leukemia (ALL). The aim of the present study was to determine the role of the two most common polymorphisms of the 5, 10-methylenetetrahydrofolate reductase (MTHFR) gene, MTHFR C677T and A1298C, and their interaction on the susceptibility to ALL. METHODS Seventy-two children with ALL and 109 age- and sex-matched healthy children from Western Iran were screened for MTHFR C677T and A1298C variants by using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS The frequencies of MTHFR 677T and 1298C alleles in patients were 29.9% and 43.1%, respectively, that were higher than those in controls (24.8% and 38.1%, respectively). Logistic regression analysis was performed and its result in the odds ratios (ORs) for possession of either MTHFR 677T or 1298C allele was found to be 1.98 [95% confidence interval (CI) 0.72-5.4, p = 0.18] and 1.48 (95% CI 0.59-3.69, p = 0.4), respectively. Also the concomitant presence of both MTHFR 677T and 1298C alleles was not associated with the risk of ALL [OR = 2.12 (95% CI 0.8-5.7, p = 0.13)]. CONCLUSION Our results in a homogenous population with Kurdish ethnic background indicated that neither the MTHFR 677T allele nor the MTHFR 1298C allele is associated with increased risk of ALL.
Collapse
Affiliation(s)
- Mohammad-Reza Azhar
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | | | | | | | | | | |
Collapse
|
44
|
Chiusolo P, Giammarco S, Bellesi S, Metafuni E, Piccirillo N, De Ritis D, Marietti S, Federica S, Laurenti L, Fianchi L, Hohaus S, Giuseppe L, Sica S. The role of MTHFR and RFC1 polymorphisms on toxicity and outcome of adult patients with hematological malignancies treated with high-dose methotrexate followed by leucovorin rescue. Cancer Chemother Pharmacol 2011; 69:691-6. [PMID: 21984221 DOI: 10.1007/s00280-011-1751-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 09/20/2011] [Indexed: 11/26/2022]
Abstract
PURPOSE In the last years, the influence of different genes involved in metabolism of chemotherapeutic agents has been studied. Methotrexate (MTX) is a key compound of chemotherapeutic regimens used in the treatment of acute lymphoblastic leukemia (ALL), primary central nervous system lymphoma (PCNSL) and Burkitt's lymphomas (BL). This study aims to evaluate the role of MTHFR C677T and A1298C polymorphisms and G80A reduced folate carrier gene (RFC1) in a cohort of adult patients with lymphoproliferative malignancies submitted to high-dose MTX followed by leucovorin rescue. METHODS We performed the analysis of these polymorphisms on genomic DNA with RFLP-PCR. RESULTS Patients carrying MTHFR A1298C variant showed decreased hepatic and hematological toxicity (P = 0.03). Overall survival (OS) and progression-free survival (PFS) between homozygous wild-type and variant patients for the RFC1 G(80)A were significantly different (P = 0.035 and P = 0.02, respectively). A significant correlation between hematological toxicity and age (P = 0.003) was observed. There was no significant influence of MTHFR C677T genotype on toxicity, OS and PFS. CONCLUSIONS Leucovorin rescue given after high-dose MTX probably accounts for the lack of influence of C677T polymorphism. To better define a role of RFC1 polymorphism on patients outcome, it would be worthwhile to perform a study on intracellular MTX level and RFC1 substrate binding affinities in different genotypes.
Collapse
Affiliation(s)
- Patrizia Chiusolo
- Department of Hematology, Università Cattolica del Sacro Cuore, Largo A. Gemelli 8, 00168, Rome, Italy.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Liu Y, Wang B, Liu X, Xie X, Gu W, Li H, Cao X. Clinical variations of serum levels of ferritin, folic acid and vitamin B12 in acute leukemia patients. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s1000-1948(11)60051-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
46
|
Metayer C, Scélo G, Chokkalingam AP, Barcellos LF, Aldrich MC, Chang JS, Guha N, Urayama KY, Hansen HM, Block G, Kiley V, Wiencke JK, Wiemels JL, Buffler PA. Genetic variants in the folate pathway and risk of childhood acute lymphoblastic leukemia. Cancer Causes Control 2011; 22:1243-58. [PMID: 21748308 DOI: 10.1007/s10552-011-9795-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 06/08/2011] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Folate is involved in the one-carbon metabolism that plays an essential role in the synthesis, repair, and methylation of DNA. We examined whether child's germline genetic variation in the folate pathway is associated with childhood acute lymphoblastic leukemia (ALL), and whether periconception maternal folate and alcohol intake modify the risk. METHODS Seventy-six single nucleotide polymorphisms (SNPs), including 66 haplotype-tagging SNPs in 10 genes (CBS, DHFR, FOLH1, MTHFD1, MTHFR, MTR, MTRR, SHMT1, SLC19A1, and TYMS), were genotyped in 377 ALL cases and 448 controls. Log-additive associations between genotypes and ALL risk were adjusted for age, sex, Hispanic ethnicity (when appropriate), and maternal race. RESULTS Single and haplotype SNPs analyses showed statistically significant associations between SNPs located in (or adjacent to) CBS, MTRR, TYMS/ENOFS, and childhood ALL. Many regions of CBS were associated with childhood ALL in Hispanics and non-Hispanics (p < 0.01). Levels of maternal folate intake modified associations with SNPs in CBS, MTRR, and TYMS. CONCLUSION Our data suggest the importance of genetic variability in the folate pathway and childhood ALL risk.
Collapse
Affiliation(s)
- Catherine Metayer
- School of Public Health, University of California, Berkeley, 1995 University Avenue, Suite 460, Berkeley, CA 94704-7392, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Tong N, Sheng X, Wang M, Fang Y, Shi D, Zhang Z, Zhang Z. Methylenetetrahydrofolate reductase gene polymorphisms and acute lymphoblastic leukemia risk: a meta-analysis based on 28 case–control studies. Leuk Lymphoma 2011; 52:1949-60. [DOI: 10.3109/10428194.2011.589545] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
48
|
D'Angelo V, Ramaglia M, Iannotta A, Crisci S, Indolfi P, Francese M, Affinita MC, Pecoraro G, Napolitano A, Fusco C, Oreste M, Indolfi C, Casale F. Methotrexate toxicity and efficacy during the consolidation phase in paediatric acute lymphoblastic leukaemia and MTHFR polymorphisms as pharmacogenetic determinants. Cancer Chemother Pharmacol 2011; 68:1339-46. [PMID: 21590445 DOI: 10.1007/s00280-011-1665-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 04/27/2011] [Indexed: 02/06/2023]
Abstract
PURPOSE Folate-metabolizing single-nucleotide polymorphisms (SNPs) are emerging as important pharmacogenetic prognostic determinants of the response to chemotherapy. With high doses of methotrexate (MTX) in the consolidation phase, methylenetetrahydrofolate reductase (MTHFR) polymorphisms could be potential modulators of the therapeutic response to antifolate chemotherapeutics in identifying a possible correlation with the outcome. This study aims to analyse the potential role of the MTHFR C677T and A1298C genetic variants in modulating the clinical toxicity and efficacy of high doses of MTX in a cohort of paediatric ALL patients (n = 151) treated with AIEOP protocols. METHODS This work includes DNA extraction by slides and RFLP-PCR. RESULTS The first observation relative to early toxicities (haematological and non-haematological), after the first doses of MTX in all protocols, was an association between the 677T and 1298C carriers and global toxicity. We found that in the 2 g/m(2) MTX group, patients harbouring 677TT homozygously exhibited a substantial 12-fold risk of developing toxicity. In this study, we demonstrate that the MTHFR 677TT variant is associated with an increased risk of relapse when compared to other genotypes. The Kaplan-Meier analysis showed that the 677TT variant had a lower 7-year DFS(disease-free survival) probability compared to the 677C carrier genotype (log-rank test P = 0.003) and OS (overall survival) and also confirms the lower probability of survival for patients with the 677TT variant (log-rank test, P = 0.006). CONCLUSIONS Our study provides further evidence of the critical role played by folate pathway enzymes in the outcome of ALL, possibly through the interference of MTX.
Collapse
Affiliation(s)
- Velia D'Angelo
- Pediatric Department, Second University of Naples, Naples, Italy.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Han D, Shen C, Meng X, Bai J, Chen F, Yu Y, Jin Y, Fu S. Methionine synthase reductase A66G polymorphism contributes to tumor susceptibility: evidence from 35 case-control studies. Mol Biol Rep 2011; 39:805-16. [PMID: 21547363 DOI: 10.1007/s11033-011-0802-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Accepted: 04/29/2011] [Indexed: 12/17/2022]
Abstract
Methionine synthase reductase (MTRR) gene is involved in tumorigenesis by regulating DNA methylation through activation of methionine synthase (MTR). MTRR is polymorphic at nucleotide 66 (A-to-G) and the resulting variant enzyme has a lower affinity for MTR. The reported associations of MTRR A66G polymorphism with cancer risk are contradictory. Therefore, we performed a meta-analysis to better assess the associations, including 18,661 cases and 27,678 controls from 35 studies. Crude ORs with 95% CIs were used to assess the strength of association between the MTRR A66G polymorphism and cancer risk. The pooled ORs were performed for homozygote model (GG vs. AA), heterozygote model (GG vs. GA), recessive genetic model (GG vs. GA + AA), and dominant genetic model (GG + GA vs. AA), respectively. Overall, results indicated that the G allele and GG variant genotypes were associated with a significantly increased cancer risk (G vs. A: OR, 1.039; 95% CI, 1.009-1.078; homozygote model: OR, 1.094; 95% CI, 1.006-1.191). In subgroup analysis by ethnicity, significant increased risks were found among Asians with G allele (G vs. A: OR, 1.063; 95% CI, 1.011-1.119; homozygote model: OR, 1.189; 95% CI, 1.055-1.341; recessive model: OR, 1.197; 95% CI, 1.068-1.341). For stratification analysis, the cancer types with fewer than three studies were categorized into "other cancers", and the results indicated that there was a significant elevated cancer risk in "other cancers" in all genetic models, not in colorectal cancer, lymphoid leukemia or breast cancer. In summary, our study suggests that the MTRR A66G polymorphism is a potential biomarker for cancer risk.
Collapse
Affiliation(s)
- Dong Han
- Laboratory of Medical Genetics, Harbin Medical University, Baojian Road 157, Nangang District, Harbin 150081, China
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Benetatos L, Dasoula A, Hatzimichael E, Syed N, Voukelatou M, Dranitsaris G, Bourantas KL, Crook T. Polo-like kinase 2 (SNK/PLK2) is a novel epigenetically regulated gene in acute myeloid leukemia and myelodysplastic syndromes: genetic and epigenetic interactions. Ann Hematol 2011; 90:1037-45. [PMID: 21340720 DOI: 10.1007/s00277-011-1193-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Accepted: 02/07/2011] [Indexed: 11/25/2022]
Abstract
Polo-like kinase 2 (SNK/PLK2), a transcriptional target for wild-type p53 and is hypermethylated in a high percentage of multiple myeloma and B cell lymphomas patients. Given these data, we sought to study the methylation status of the specific gene in acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS), and to correlate it with clinical and genetic features. Using methylation-specific PCR MSP, we analyzed the methylation profile of 45 cases of AML and 43 cases of MDS. We also studied the distribution of MTHFR A1298C and MTHFR C677T polymorphisms and FLT3 mutations in AML patients and correlated the results with hypermethylation in the SNK/PLK2 CpG island. The SNK/PLK2 CpG island was hypermethylated in 68.9% and 88.4% of AML and MDS cases, respectively. Cases with hypermethylation had a trend towards more favorable overall survival (OS). There was no association between different MTHFR genotypes and susceptibility to develop AML. SNK/PLK2 hypermethylation combined with the MTHFR AA1298 genotype was associated with a tendency for a better OS. Similarly, patients with SNK/PLK2 hypermethylation combined with the MTHFR CT677 polymorphism had a better OS (HR = 0.34; p = 0.017). SNK/PLK2 methylation associated with unmutated FLT3 cases had a trend for better OS compared to patients with mutated FLT3 gene. SNK/PLK2 is a novel epigenetically regulated gene in AML and MDS, and methylation occurs at high frequency in both diseases. As such, SNK/PLK2 could represent a potential pathogenetic factor, although additional studies are necessary to verify its exact role in disease pathogenesis.
Collapse
Affiliation(s)
- Leonidas Benetatos
- Department of Hematology, University Hospital of Ioannina, Niarchos Avenue, 45500 Ioannina, Greece.
| | | | | | | | | | | | | | | |
Collapse
|