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Wang P, Zhu Y, Xi S, Li S, Zhang Y. Association between MnSOD Val16Ala Polymorphism and Cancer Risk: Evidence from 33,098 Cases and 37,831 Controls. DISEASE MARKERS 2018; 2018:3061974. [PMID: 30245752 PMCID: PMC6139213 DOI: 10.1155/2018/3061974] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 07/25/2018] [Indexed: 12/31/2022]
Abstract
Manganese superoxide dismutase (MnSOD) plays a critical role in the defense against reactive oxygen species. The association between MnSOD Val16Ala polymorphism and cancer risk has been widely studied, but the results are contradictory. To obtain more precision on the association, we performed the current meta-analysis with 33,098 cases and 37,831 controls from 88 studies retrieved from PubMed, Embase, Chinese National Knowledge Infrastructure (CNKI), and Wanfang databases. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of association. We found that the polymorphism was associated with an increased overall cancer risk (homozygous: OR = 1.09, 95% CI = 1.00-1.19; heterozygous: OR = 1.07, 95% CI = 1.02-1.12; dominant: OR = 1.08, 95% CI = 1.02-1.14; and allele comparison: OR = 1.06, 95% CI = 1.02-1.11). Stratification analysis further showed an increased risk for prostate cancer, Asians, Caucasians, population-based studies, hospital-based studies, low quality and high quality studies. However, the increased risk for MnSOD Val16Ala polymorphism among Asians needs further validation based on the false-positive report probability (FPRP) test. To summarize, this meta-analysis suggests that the MnSOD Val16Ala polymorphism is associated with significantly increased cancer risk, which needs further validation in single large studies.
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Affiliation(s)
- Ping Wang
- Department of Biochemistry and Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Yanfeng Zhu
- School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Shoumin Xi
- Department of Biochemistry and Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Sanqiang Li
- Department of Biochemistry and Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Yanle Zhang
- Department of Biochemistry and Molecular Biology, Medical College, Henan University of Science and Technology, Luoyang, Henan 471023, China
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Wang C, Liu Y, Zhou J, Ye L, Chen N, Zhu M, Ji Y. There is no relationship between SOD2 Val-16Ala polymorphism and breast cancer risk or survival. Mol Clin Oncol 2017; 7:579-590. [PMID: 29046792 DOI: 10.3892/mco.2017.1376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 07/21/2017] [Indexed: 02/05/2023] Open
Abstract
Breast cancer is the most common diagnosed cancer among females worldwide. Superoxide dismutase 2 (SOD2), an antioxidant enzyme, may break the balance between the oxidant and antioxidant system to induce various diseases. The present study aimed to clarify the association between the SOD2 Val-16Ala polymorphism and breast cancer risk or survival. Thus, a meta-analysis of the relevant articles retrieved from PubMed and EMBASE databases was conducted to illuminate the association with odd ratios (ORs) or hazards ratios (HRs). A total of 26 eligible publications (n=38,008) were available in risk analysis and eight publications (n=5,746) in survival analysis. The results demonstrated a marginal association between breast cancer risk and SOD2 polymorphism in Caucasian patients [TT vs. CT + CC: (OR, 0.94; 95% confidence interval (CI), 0.88-1.00)]. However, no other positive results were observed in risk and survival of breast cancer in the whole study [T vs. C: (OR, 0.99; 95% CI, 0.96-1.02); CT vs. CC: (OR, 1.00; 95% CI, 0.95-1.05); TT vs. CC: (OR, 0.98; 95% CI, 0.92-1.05); TT vs. CT + CC: (OR, 1.00; 95% CI, 0.95-1.05); CT + TT vs. CC: (OR, 0.99; 95% CI, 0.95-1.05)]. The present meta-analysis indicated that there was no significant relationship between SOD2 Val-16Ala polymorphism and breast cancer risk or survival, although in Caucasian patients, the SOD2 TT genotype may marginally decrease the risk of breast cancer in comparison to the CT + CC genotype.
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Affiliation(s)
- Chengdi Wang
- Department of Respiratory and Critical Care Medicine, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yang Liu
- Department of Vascular Surgery, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jian Zhou
- Department of Thoracic Surgery, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Lei Ye
- Department of Vascular Surgery, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Nan Chen
- Department of Thoracic Surgery, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Min Zhu
- Department of Respiratory and Critical Care Medicine, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yulin Ji
- Department of Respiratory and Critical Care Medicine, West China Medical School/West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Nie H, Chen G, He J, Zhang F, Li M, Wang Q, Zhou H, Lyu J, Bai Y. Mitochondrial common deletion is elevated in blood of breast cancer patients mediated by oxidative stress. Mitochondrion 2016; 26:104-12. [PMID: 26678158 PMCID: PMC4846287 DOI: 10.1016/j.mito.2015.12.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 11/25/2015] [Accepted: 12/04/2015] [Indexed: 02/07/2023]
Abstract
The 4977 bp common deletion is one of the most frequently observed mitochondrial DNA (mtDNA) mutations in human tissues and has been implicated in various human cancer types. It is generally believed that continuous generation of intracellular reactive oxygen species (ROS) during oxidative phosphorylation (OXPHOS) is a major underlying mechanism for generation of such mtDNA deletions while antioxidant systems, including Manganese superoxide dismutase (MnSOD), mitigating the deleterious effects of ROS. However, the clinical significance of this common deletion remains to be explored. A comprehensive investigation on occurrence and accumulation of the common deletion and mtDNA copy number was carried out in breast carcinoma (BC) patients, benign breast disease (BBD) patients and age-matched healthy donors in our study. Meanwhile, the representative oxidative (ROS production, mtDNA and lipid oxidative damage) and anti-oxidative features (MnSOD expression level and variation) in blood samples from these groups were also analyzed. We found that the mtDNA common deletion is much more likely to be detected in BC patients at relatively high levels while the mtDNA content is lower. This alteration has been associated with a higher MnSOD level and higher oxidative damages in both BC and BBD patients. Our results indicate that the mtDNA common deletion in blood may serve a biomarker for the breast cancer.
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Affiliation(s)
- Hezhongrong Nie
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Guorong Chen
- Department of Pathology of the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jing He
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Fengjiao Zhang
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ming Li
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qiufeng Wang
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huaibin Zhou
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jianxin Lyu
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Yidong Bai
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.
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Yuzhalin AE, Kutikhin AG. Inherited variations in theSODandGPXgene families and cancer risk. Free Radic Res 2012; 46:581-99. [DOI: 10.3109/10715762.2012.658515] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ermolenko NA, Boyarskikh UA, Sushko AG, Voronina EN, Selezneva IA, Sinkina TV, Lazarev AF, Petrova VD, Filipenko ML. Effect of point substitutions in the MnSOD, GPX1, and GSTP1 genes on the risk of familial and sporadic breast cancers in residents of Altai Krai. RUSS J GENET+ 2010. [DOI: 10.1134/s1022795410120124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chen Y, Pei J. Possible risk modifications in the association between MnSOD Ala-9Val polymorphism and breast cancer risk: subgroup analysis and evidence-based sample size calculation for a future trial. Breast Cancer Res Treat 2010; 125:495-504. [PMID: 20567899 DOI: 10.1007/s10549-010-0978-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Accepted: 06/01/2010] [Indexed: 01/24/2023]
Abstract
Manganese superoxide dismutase (MnSOD) has been identified as an important scavenger of reactive oxygen species (ROS), which can cause oxidative stress followed by breast cancer. A number of subsequent population-based studies have investigated the association between MnSOD Ala-9Val polymorphism and the risk of breast cancer. However, these studies have yielded conflicting results. This fact implies that the effect of MnSOD Ala-9Val polymorphism on the susceptibility to breast cancer may be modified by other risk factors. To provide a more definitive conclusion, a full meta-analysis combining and summarizing 16 studies was first performed using both traditional and Bayesian approaches. During this step, a recessive inheritance mode was determined after a biological justification. The capability of the Bayesian method was highlighted in the estimation of a pooled odds ratio and 95% confidence interval. As a result, no significant association was observed (OR = 0.978, CI = 0.914-1.046). Bayesian meta-regression and subgroup analysis were then conducted to find possible risk modifications by other factors, including menopausal status, ethnicity effect, use of oral contraceptives, use of hormone replacement therapy, fruits and vegetables intake, vitamin supplement, and body mass index. While the power of most subgroups may be insufficient to make a statistical statement, an evidence-based sample size calculation based upon updated meta-analysis was performed to power a future trial. For example, approximately 5,000 subjects are required for a new Asian study (2,500 cases and 2,500 controls) to achieve 80% power.
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Affiliation(s)
- Yun Chen
- Department of Pharmacology, Nanjing Medical University, Nanjing, 210029, China.
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Qiu LX, Yao L, Mao C, Chen B, Zhan P, Yuan H, Xue K, Zhang J, Hu XC. Lack of association between MnSOD Val16Ala polymorphism and breast cancer risk: a meta-analysis involving 58,448 subjects. Breast Cancer Res Treat 2010; 123:543-7. [DOI: 10.1007/s10549-010-0777-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Accepted: 01/28/2010] [Indexed: 02/07/2023]
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No association between SOD2 Val16Ala polymorphism and breast cancer susceptibility: a meta-analysis based on 9,710 cases and 11,041 controls. Breast Cancer Res Treat 2010; 122:509-14. [PMID: 20052533 DOI: 10.1007/s10549-009-0725-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2009] [Accepted: 12/24/2009] [Indexed: 11/27/2022]
Abstract
Breast cancer is the most common cancer in women worldwide, but its etiology is still unclear. It is believed that oxidative stress plays an essential role in the development of breast cancer, while SOD2 is one of the primary enzymes that directly convert potential harmful oxidizing species to harmless metabolites. The association of SOD2 Val16Ala polymorphism and breast cancer risk has been widely reported, but results of previous studies were somewhat contradictory and underpowered. To overcome the limitations of individual study and to understand the real situation, we conducted a systematic review and meta-analysis toward the association between SOD2 Val16Ala polymorphism and breast cancer. Through retrieving MEDLINE, PubMed, Embase, and Web of Science, a total of 17 studies with 9,710 cases and 11,041 controls were identified. The results showed that no significant associations were found for the allele contrast (allele Ala vs. allele Val: OR = 1.020, 95% CI = 0.979-1.062), additive genetic model (Ala/Ala vs. Val/Val: OR = 1.091, 95% CI = 0.969-1.229), dominant genetic model (Ala/Ala +Ala/Val vs. Val/Val: OR = 1.045, 95% CI = 0.961-1.136), and recessive genetic model (Ala/Ala vs. Val/Val +Ala/Val: OR = 1.027, 95% CI = 0.956-1.102). In the stratified analysis by ethnicity and menopausal status, significant associations were also not detected in all genetic models. Conclusively, this meta-analysis strongly suggests that SOD2 Val16Ala polymorphism is not associated with breast cancer susceptibility.
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