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Impact of EcSOD Perturbations in Cancer Progression. Antioxidants (Basel) 2021; 10:antiox10081219. [PMID: 34439467 PMCID: PMC8388922 DOI: 10.3390/antiox10081219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/20/2021] [Accepted: 07/23/2021] [Indexed: 01/29/2023] Open
Abstract
Reactive oxygen species (ROS) are a normal byproduct of cellular metabolism and are required components in cell signaling and immune responses. However, an imbalance of ROS can lead to oxidative stress in various pathological states. Increases in oxidative stress are one of the hallmarks in cancer cells, which display an altered metabolism when compared to corresponding normal cells. Extracellular superoxide dismutase (EcSOD) is an antioxidant enzyme that catalyzes the dismutation of superoxide anion (O2−) in the extracellular environment. By doing so, this enzyme provides the cell with a defense against oxidative damage by contributing to redox balance. Interestingly, EcSOD expression has been found to be decreased in a variety of cancers, and this loss of expression may contribute to the development and progression of malignancies. In addition, recent compounds can increase EcSOD activity and expression, which has the potential for altering this redox signaling and cellular proliferation. This review will explore the role that EcSOD expression plays in cancer in order to better understand its potential as a tool for the detection, predicted outcomes and potential treatment of malignancies.
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Pabalan N, Singh N, Singian E, Barbosa CP, Bianco B, Jarjanazi H. Associations of CYP1A1 gene polymorphisms and risk of breast cancer in Indian women: a meta-analysis. AIMS GENETICS 2021. [DOI: 10.3934/genet.2015.4.250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AbstractReported associations of CYP1A1 polymorphisms with breast cancer have been inconsistent. In this meta-analysis examining breast cancer associations of three CYP1A1 polymorphisms (M1, M2 and M4) among Indian women may yield information that may be of clinical and epidemiological use for this particular demography. We searched MEDLINE using PubMed and Embase for association studies. From seven published case-control studies, we estimated overall associations and applied subgroup analysis to explore differential effects. All three polymorphisms exhibited overall increased risk, significant in M1 (OR 1.61–1.65, p = 0.04) and M4 (OR 2.02–3.92, p = 0.02–0.04). Differential effects were observed only in the M1 polymorphism where M1 effects were significant in South Indians (OR 2.20–4.34, p < 0.0001) but not the North population, who were at reduced risk (OR 0.64–0.77, p = 0.03–0.55). These populations were not materially different in regard to M2 and M4 as did the women stratified by menopausal status. In this meta-analysis, M1 and M4 effects may render Indian women susceptible, but may be limited by heterogeneity of the studies. Differential effects of the M1 polymorphism in breast cancer render South Indians susceptible compared to those in the North.
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Affiliation(s)
- Noel Pabalan
- Center for Research and Development, Angeles University Foundation, Angeles City 2009, Philippines
| | - Neetu Singh
- Genotoxicity Laboratory, Toxicology Division, Central Drug Research Institute, Lucknow 226 001, Utar Pradesh, India
| | - Eloisa Singian
- College of Allied Medical Profession, Angeles University Foundation, Angeles City 2009 Philippines
| | - Caio Parente Barbosa
- Department of Gynecology and Obstetrics-Faculdade de Medicina do ABC, Human Reproduction and Genetics Center, Avenida Prıncipe de Gales, 821, Santo Andre, SP, 09060-650, Brazil
| | - Bianca Bianco
- Department of Gynecology and Obstetrics-Faculdade de Medicina do ABC, Human Reproduction and Genetics Center, Avenida Prıncipe de Gales, 821, Santo Andre, SP, 09060-650, Brazil
| | - Hamdi Jarjanazi
- 5 Environmental Monitoring and Reporting Branch, Ontario Ministry of the Environment and Climate Change, 125 Resources Road, Toronto, ON, Canada M9P 3V6
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Rajagopal T, Seshachalam A, Rathnam KK, Jothi A, Talluri S, Venkatabalasubramanian S, Dunna NR. Impact of xenobiotic-metabolizing gene polymorphisms on breast cancer risk in South Indian women. Breast Cancer Res Treat 2021; 186:823-837. [PMID: 33392841 DOI: 10.1007/s10549-020-06028-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/16/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Functional variants of the xenobiotic-metabolizing genes (XMG) might modulate breast cancer (BC) risk by altering the rate of metabolism and clearance of myriad types of potent carcinogens from the breast tissue. Despite mounting evidence on the role of XMG variants on BC risk, the current knowledge regarding their influence on BC development is still fragmentary. METHODS The present study examined the candidate genetic variants in CYP1A1, NQO1, GST-T1, GST-M1, and GST-P1 in 1002 subjects (502 BC patients and 500 disease-free women). PCR-RFLP was employed to genotype the mono-nucleotide variation in CYP1A1, NQO1, and GST-P1, and allele-specific PCR was used to detect the deletion polymorphism in GST-T1 and GST-M1 genes. RESULTS Regarding CYP1A1-M1 polymorphism, the heterozygous TC and mutant CC genotype conferred 1.47-fold (95% CI 1.13-1.91, p = 0.004) and 1.84-fold (95% CI 1.17-2.91, p = 0.009) elevated risk of BC. GST-T1 null genotype was associated with increased BC risk (OR 1.47; 95% CI 1.02-2.11, p = 0.037). For the NQO1 C609T variant, the mutant T allele was associated with BC risk with an odds ratio of 1.22 (95% CI 1.02-1.48, p = 0.034). Combinatorial analysis indicated that the presence of NQO1*2 (CT), CYP1A1-M1 (CC), and GST-P1 rs1695 (AG) genotypes conferred 16.7-fold elevated risk of BC (95% CI 3.65-76.85; p < 0.001). Moreover, GST-M1 null genotype was associated with the development of larger primary breast tumors. CONCLUSION Xenobiotic-metabolizing gene polymorphisms may play a crucial role in mammary carcinogenesis in South Indian women.
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Affiliation(s)
- Taruna Rajagopal
- Cancer Genomics Laboratory, Department of Biotechnology, School of Chemical and Biotechnology, SASTRA - Deemed University, Thanjavur, 613 401, India
| | - Arun Seshachalam
- Department of Medical and Paediatric Oncology, Dr.G.V.N Cancer Institute, Singarathope, Trichy, 620 008, India
| | - Krishna Kumar Rathnam
- Department of Hemato Oncology - Medical Oncology and Bone Marrow Transplantation, Meenakshi Mission Hospital & Research Centre, Madurai, 625 107, India
| | - Arunachalam Jothi
- Department of Bioinformatics, School of Chemical and Biotechnology, SASTRA - Deemed University, Thanjavur, 613 401, India
| | - Srikanth Talluri
- Dana Farber Cancer Institute, Boston, MA, 02215, USA.,Veterans Administration Boston Healthcare System, West Roxbury, MA, 02132, USA
| | - Sivaramakrishnan Venkatabalasubramanian
- Department of Genetic Engineering, Faculty of Engineering and Technology, SRM Institute of Medical Science and Technology, Kattankulathur Campus, Chennai, 603 203, India
| | - Nageswara Rao Dunna
- Cancer Genomics Laboratory, Department of Biotechnology, School of Chemical and Biotechnology, SASTRA - Deemed University, Thanjavur, 613 401, India.
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Sengupta D, Banerjee S, Mukhopadhyay P, Guha U, Ganguly K, Bhattacharjee S, Sengupta M. A meta-analysis and in silico analysis of polymorphic variants conferring breast cancer risk in the Indian subcontinent. Future Oncol 2020; 16:2121-2142. [PMID: 32744066 DOI: 10.2217/fon-2020-0333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: Genetic association studies on breast cancer on the Indian subcontinent have yielded conflicting results, and the precise effect of these variants on breast cancer pathogenesis is not known. Methods: Genomic variants, as obtained from selected studies from the Indian subcontinent, were subjected to random-effects and fixed-effect meta-analysis. Functional annotation of the relevant variants was done through a tried and tested in silico pipeline. Results: We found rs4646903/CYP1A1, rs1799814/CYP1A1, rs61886492/GCPII, del2/GSTM1, rs4680/COMT and rs1801394/MTRR to be associated with breast cancer. The del2/GSTM1 holds the association in premenopausal women. Conclusions: This is the first study of its kind from the Indian subcontinent analysing the extent of association of variants across populations followed by their functional annotation in the disease pathway.
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Affiliation(s)
- Debmalya Sengupta
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Souradeep Banerjee
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Pramiti Mukhopadhyay
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Udayan Guha
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Kausik Ganguly
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Samsiddhi Bhattacharjee
- National Institute of Biomedical Genomics, Near Netaji Subhas Sanatorium Post Office, Kalyani, West Bengal 741251, India
| | - Mainak Sengupta
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
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Breast cancer susceptibility genes in estrogen metabolizing pathway in a southern Indian population. Meta Gene 2019. [DOI: 10.1016/j.mgene.2018.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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6
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Hussain T, Alrokayan S, Upasna U, Pavithrakumari M, Jayapriya J, Kutala VK, Naushad SM. Meta-analysis of genetic polymorphisms in xenobiotic metabolizing enzymes and their association with breast cancer risk. J Genet 2018. [DOI: 10.1007/s12041-018-0946-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kakkoura MG, Sokratous K, Demetriou CA, Loizidou MA, Loucaides G, Kakouri E, Hadjisavvas A, Kyriacou K. Mediterranean diet-gene interactions: A targeted metabolomics study in Greek-Cypriot women. Mol Nutr Food Res 2017; 61. [PMID: 27860207 DOI: 10.1002/mnfr.201600558] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 10/06/2016] [Accepted: 11/04/2016] [Indexed: 12/27/2022]
Abstract
SCOPE A high adherence to the Mediterranean diet (MD) was previously associated with a decreased risk of breast cancer (BC) among Greek-Cypriot women. Additionally, particular polymorphisms were shown to modulate this MD-BC association. Herein, we aimed to investigate the effect of polymorphisms-MD interactions on the levels of specific metabolites that could be related to dietary adherence or enzymatic activity, which is itself modulated by polymorphisms. METHODS AND RESULTS Greek-Cypriot women who were BC controls and had the lowest or the highest MD adherence (vegetables, fruit, legumes, fish) as assessed by principal component analysis (n = 564) were included. Participants were previously genotyped for nine polymorphisms of the one-carbon metabolism, oxidative stress, and xenobiotic metabolism. The serum levels of 14 metabolites that are key players in the aforementioned pathways were measured by UPLC-MS/MS. ANCOVA was used to assess polymorphism-MD interactions on metabolites' levels within a multivariate linear regression model. Statistically significant interactions between GSTM1 (where GST is glutathione S-transferase) deletion polymorphism and MD on flavin mononucleotide and on 5-methyltetrahydrofolate (5-MTHF) concentrations were observed. The MTHFR rs1801133 interacted significantly with MD on 5-MTHF concentration. CONCLUSION Serum levels of flavin mononucleotide and 5-MTHF were shown to be influenced by interactions between GSTM1 deletion or MTHFR (rs1801133) polymorphisms and a dietary pattern, characteristic of MD.
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Affiliation(s)
- Maria G Kakkoura
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,The Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Kleitos Sokratous
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Christiana A Demetriou
- The Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Neurology Clinic D, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Maria A Loizidou
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - Eleni Kakouri
- Department of Medical Oncology, Bank of Cyprus Oncology Centre, Nicosia, Cyprus
| | - Andreas Hadjisavvas
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,The Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Kyriacos Kyriacou
- Department of Electron Microscopy/Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,The Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
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Abstract
In first part of this study, a systematic review was designed to explore the involvement of CYP1A1 and GSTP1 genes in breast cancerogenesis. Based on systematic review, we designed a study to screen CYP1A1 and GSTP1 genes for mutation and their possible association with breast carcinogenesis. A total of 400 individuals were collected and analyzed by PCR-SSCP. After sequence analysis of coding region of CYP1A1 we identified eleven mutations in different exons of respective gene. Among these eleven mutations, ~3 folds increased breast cancer risk was found associated with Asp82Glu mutation (OR 2.99; 95% CI 1.26-7.09), with Ser83Thr mutation (OR 2.99; 95% CI 1.26-7.09) and with Glu86Ala mutation (OR 3.18; 95% CI 1.27-7.93) in cancer patients compared to controls. Furthermore, ~4 folds increase in breast cancer risk was found associated with Asp347Glu, Phe398Tyr and 5178delT mutations (OR 3.92; 95% CI 1.35-11.3) in patients compared to controls. The sequence analysis of GSTP1 resulted in identification of total five mutations. Among these five mutations, ~3 folds increase in breast cancer risk was observed associated with 1860G>A mutation, with 1861-1876delCAGCCCTCTGGAGTGG mutation (OR 2.70; 95% CI 1.10-6.62) and with 1861C>A mutation (OR 2.97; 95% CI 1.01-8.45) in cancer patients compared to controls. Furthermore, ~5 folds increase in breast cancer risk was associated with 1883G>T mutation (OR 4.75; 95% CI 1.46-15.3) and ~6 folds increase in breast cancer risk was found associated with Iso105Val mutation (OR 6.43; 95% CI 1.41-29.3) in cancer patients compared to controls. Our finding, based on systematic review and experimental data suggest that the polymorphic CYP1A1 and GSTP1 genes may contribute to risk of developing breast cancer.
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Sak K. The Val158Met polymorphism in COMT gene and cancer risk: role of endogenous and exogenous catechols. Drug Metab Rev 2016; 49:56-83. [PMID: 27826992 DOI: 10.1080/03602532.2016.1258075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Catechol-O-methyltransferase, COMT, is an important phase II enzyme catalyzing the transfer of a methyl-group from S-adenosylmethionine to a catechol-containing substrate molecule. A genetic variant Val158Met in the COMT gene leads to a several-fold decrease in the enzymatic activity giving rise to the accumulation of potentially carcinogenic endogenous catechol estrogens and their reactive intermediates and increasing thus the risk of tumorigenesis. However, numerous association studies between the COMT genotype and susceptibility to various malignancies have shown inconsistent and controversial findings indicating that additional gene-gene and gene-environment interactions might be crucial in modulating the physiological role of the COMT. In this review article, the important contribution of dietary catechol-containing flavonoids to modification of the relationships between the COMT genotype and cancer risk is discussed. Whereas, the diverse anticancer activities of common phytochemicals, such as green tea polyphenols, quercetin, fisetin or luteolin, can be markedly changed (both decreased or increased) by the COMT-mediated O-methylation of these exogenous substrates, flavonoids can also behave as potent inhibitors of the COMT enzyme slowing detoxification of endogenous catechol estrogens. Such a many-featured functioning of the COMT and its complex regulation by several different genetic and environmental factors, including plant-based food ingredients, emphasizes the necessity to further stratify the association studies between the COMT genotype and tumor risk by consumption of catechol-containing dietary flavonoids. Currently, it can be only speculated that some of the possible associations might be masked by the regular intake of specific food polyphenols, taking effect in certain communities or populations.
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Affiliation(s)
- Katrin Sak
- a Department of Hematology and Oncology , Institute of Clinical Medicine, University of Tartu , Tartu , Estonia
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10
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Naushad SM, Janaki Ramaiah M, Pavithrakumari M, Jayapriya J, Hussain T, Alrokayan SA, Gottumukkala SR, Digumarti R, Kutala VK. Artificial neural network-based exploration of gene-nutrient interactions in folate and xenobiotic metabolic pathways that modulate susceptibility to breast cancer. Gene 2016; 580:159-168. [DOI: 10.1016/j.gene.2016.01.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/01/2016] [Accepted: 01/12/2016] [Indexed: 02/08/2023]
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Rentsendorj O, Zhang X, Williams MC, Buehler PW, D’Agnillo F. Transcriptional Suppression of Renal Antioxidant Enzyme Systems in Guinea Pigs Exposed to Polymerized Cell-Free Hemoglobin. TOXICS 2016; 4. [PMID: 27471729 PMCID: PMC4961095 DOI: 10.3390/toxics4010006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hemoglobin-based oxygen carriers (HBOCs) are being developed as oxygen and plasma volume-expanding therapeutics though their potential to promote oxidative tissue injury has raised safety concerns. Using a guinea pig exchange transfusion model, we examined the effects of polymerized bovine hemoglobin (HbG) on the transcriptional regulation, activity, and expression of the renal antioxidant enzymes; superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). HbG infusion downregulated the mRNA levels for genes encoding SOD isoforms 1-3, GPx1, GPx3, GPx4, and CAT. This transcriptional suppression correlated with decreased enzymatic activities for SOD, CAT, and GPx. Immunostaining revealed decreased protein expression of SOD1, CAT, and GPx1 primarily in renal cortical tubules. DNA methylation analyses identified CpG hypermethylation in the gene promoters for SOD1-3, GPx1, GPx3, and GPx4, suggesting an epigenetic-based mechanism underlying the observed gene repression. HbG also induced oxidative stress as evidenced by increased renal lipid peroxidation end-products and 4-HNE immunostaining, which could be the result of the depleted antioxidant defenses and/or serve as a trigger for increased DNA methylation. Together, these findings provide evidence that the renal exposure to HbG suppresses the function of major antioxidant defense systems which may have relevant implications for understanding the safety of hemoglobin-based products.
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Zhou Q, Wang Y, Chen A, Tao Y, Song H, Li W, Tao J, Zuo M. Association between the COMT Val158Met polymorphism and risk of cancer: evidence from 99 case-control studies. Onco Targets Ther 2015; 8:2791-803. [PMID: 26491354 PMCID: PMC4599643 DOI: 10.2147/ott.s90883] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Catechol-O-methyltransferase (COMT) plays a central role in DNA repair and estrogen-induced carcinogenesis. Many recent epidemiologic studies have investigated the association between the COMT Val158Met polymorphism and cancer risk, but the results are inconclusive. In this study, we performed a meta-analysis to investigate the association between cancer susceptibility and COMT Val158Met in different genetic models. Overall, no significant associations were found between COMT Val158Met polymorphism and cancer risk (homozygote model: odds ratio [OR] =1.05, 95% confidence interval [CI] = [0.98, 1.13]; heterozygote model: OR =1.01, 95% CI = [0.98, 1.04]; dominant model: OR =1.02, 95% CI [0.97, 1.06], and recessive model: OR =1.03, 95% CI [0.97, 1.09]). In the subgroup analysis of cancer type, COMT Val158Met was significantly associated with increased risks of bladder cancer in recessive model, and esophageal cancer in homozygote model, heterozygote model, and dominant model. Subgroup analyses based on ethnicities, COMT Val158Met was significantly associated with increased risk of cancer in homozygote and recessive model among Asians. In addition, homozygote, recessive, and dominant models were significantly associated with increased cancer risk in the subgroup of allele-specific polymerase chain reaction genotyping. Significant associations were not observed when data were stratified by the source of the controls. In summary, this meta-analysis suggested that COMT Val158Met polymorphism might not be a risk factor for overall cancer risk, but it might be involved in cancer development at least in some ethnic groups (Asian) or some specific cancer types (bladder and esophageal cell cancer). Further evaluations of more preclinical and epidemiological studies are required.
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Affiliation(s)
- Quan Zhou
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Yan Wang
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Aihua Chen
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Yaling Tao
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Huamei Song
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Wei Li
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Jing Tao
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
| | - Manzhen Zuo
- Department of Gynecology and Obstetrics, The People’s Hospital of Three Gorges University, The First People’s Hospital of Yichang, Yichang, People’s Republic of China
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de Oliveira CBM, Cardoso-Filho C, Bossi LS, Lourenço GJ, Costa-Gurgel MS, Lima CSP. Association of CYP1A1 A4889G and T6235C polymorphisms with the risk of sporadic breast cancer in Brazilian women. Clinics (Sao Paulo) 2015; 70:680-5. [PMID: 26598080 PMCID: PMC4602382 DOI: 10.6061/clinics/2015(10)04] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 07/21/2015] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES We examined the influence of CYP1A1 A4889G and T6235C polymorphisms on the risk of sporadic breast cancer. METHODS DNA from 742 sporadic breast cancer patients and 742 controls was analyzed using the polymerase chain reaction, followed by the restriction fragment length polymorphism technique. RESULTS More patients had the CYP1A1 4889AG+GG genotype compared to controls (29.0% versus 23.2%, p=0.004). The G allele carriers had a 1.50-fold increased risk (95% CI: 1.14-1.97) of sporadic breast cancer compared to the other study participants. The frequency of the 4889AG+GG genotype among the Caucasian patients was higher than in the non-Caucasian patients (30.4% versus 20.2%, p=0.03) and controls (30.4% versus 23.2%, p=0.002). Caucasians and G allele carriers had a 1.61-fold increased risk (95% CI: 1.20-2.15) of sporadic breast cancer compared to other subjects. The CYP1A1 4889AG+GG genotype was more common among patients with a younger median age at first full-term pregnancy than among controls (33.8% versus 23.2%, p=0.001) and subjects whose first full-term pregnancies occurred at an older age (33.8% versus 26.1%, p=0.03). Women with the CYP1A1 4889AG+GG genotype and earlier first full-term pregnancies had a 1.87-fold (95% CI: 1.32-2.67) increased risk of sporadic breast cancer compared to the other study participants. Excess CYP1A1 4889AG+GG (39.8% versus27.1%, p=0.01) and 6235TC+CC (48.4% versus 35.9%, p=0.02) genotypes were also observed in patients with grade I and II tumors compared to patients with grade III tumors and controls (39.8% versus 23.2%, p=0.04; 48.4% versus 38.6%, p=0.04). The G and C allele carriers had a 2.44-fold (95% CI: 1.48-4.02) and 1.67-fold (95% CI: 1.03-2.69) increased risk, respectively, of developing grade I and II tumors compared to other subjects. CONCLUSIONS The CYP1A1 A4889G and T6235C polymorphisms may alter the risk of sporadic breast cancer in Brazilian women.
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Affiliation(s)
- Camila Borges Martins de Oliveira
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Clínica Médica, Campinas, SP, Brazil
- Corresponding author: E-mail:
| | - Cássio Cardoso-Filho
- Universidade de Campinas, Centro de Assistência Integral à Saúde da Mulher, Campinas, SP, Brazil
| | - Leonardo Silveira Bossi
- Universidade de Campinas, Centro de Assistência Integral à Saúde da Mulher, Campinas, SP, Brazil
| | - Gustavo Jacob Lourenço
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Clínica Médica, Campinas, SP, Brazil
| | | | - Carmen Silvia Passos Lima
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Clínica Médica, Campinas, SP, Brazil
- Corresponding author: E-mail:
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Kumar P, Yadav U, Rai V. Methylenetetrahydrofolate reductase gene C677T polymorphism and breast cancer risk: Evidence for genetic susceptibility. Meta Gene 2015; 6:72-84. [PMID: 26629412 PMCID: PMC4634353 DOI: 10.1016/j.mgene.2015.08.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/21/2015] [Accepted: 08/31/2015] [Indexed: 12/11/2022] Open
Abstract
There are several evidences supporting the role of 5–10 methylenetetrahydrofolate reductase (MTHFR) gene polymorphisms in breast cancer (BC). Case control association studies on breast cancer have been repeatedly performed over the last two decades, but results are inconsistent. We performed a meta-analysis to confirm the association between MTHFR C677T polymorphism and BC risk. The articles were retrieved by searching the PubMed, Google Scholar, and Springer Link databases. Crude odds ratios (OR) with 95% confidence intervals (CIs) was used to assess the strength of association between C677T polymorphism and BC. Publication bias was assessed by Egger's and Begg-Mazumdar tests. Meta-analysis was performed with Open Meta Analyst. Total 75 studies with 31,315 cases and 35, 608 controls were found suitable for the inclusion in the present meta-analysis. The results of meta-analysis suggested that there were moderate significant association between C677T polymorphism and BC risk using overall comparisons in five genetic models (T vs. C: OR = 1.08, 95% CI = 1.03–1.13, p = < 0.001; TT + CT vs. CC: OR = 1.06, 95% CI = 1.02–1.09, p = < 0.001; TT vs. CC: OR = 1.17, 95% CI = 1.06–1.28, p = 0.001; CT vs. CC OR = 1.05, 95% CI = 1.01–1.08, p = 0.005; TT vs. CT + CC: OR = 1.12, 95% CI = 1.03–1.22, p = 0.005). In conclusion, results of present meta-analysis showed modest association between MTHFR C677T polymorphism with breast cancer in total studies. However, sub-group analysis results based on ethnicity showed strong significant association between TT genotype and breast cancer (TT vs. CC; OR°=°1.26; 95% CI: 1.06–1.51; p = 0.009) in Asian population but in Caucasian population such association was not observed (TT vs. CC; OR°=°1.08; 95% CI: 0.99–1.14; p = 0.05).
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Affiliation(s)
| | | | - Vandana Rai
- Corresponding author at: Human Molecular Genetics Laboratory, Department of Biotechnology, VBS Purvanchal University, Jaunpur 222 003, India.Human Molecular Genetics LaboratoryDepartment of BiotechnologyVBS Purvanchal UniversityJaunpur222 003India
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Rai V. The methylenetetrahydrofolate reductase C677T polymorphism and breast cancer risk in Asian populations. Asian Pac J Cancer Prev 2015; 15:5853-60. [PMID: 25081713 DOI: 10.7314/apjcp.2014.15.14.5853] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Methylenetetrahydrofolate (MTHFR) is the key enzyme of the folate metabolic pathway and several studies have pointed to association between the MTHFR C677T polymorphism and breast cancer risk. Although significant association was observed in some studies, in others no clear link could be established. OBJECTIVE A meta-analysis of published Asian case control studies was therefor carried out to shed further light on any C677T breast cancer association. MATERIALS AND METHODS PubMed, Springer Link, Google Scholar and Elsevier databases were searched for case control studies of associations between MTHFR C677T polymorphism and breast cancer risk. Odds ratios (ORs) with 95% confidence intervals (CIs) were estimated to assess the association. A total of 36 studies including 8,040 cases and 10,008 controls were included in the present meta-analysis. RESULTS Overall, a significantly elevated breast cancer risk was associated with the T allele and TT genotype in homozygote comparison and dominant genetic models when all studies were pooled into the meta-analysis (T vs C (allele contrast model): OR=1,23, 95%CI=1.13-1.37, p=0.000 ; TT vs CC(homozygote model): OR=1.38, 95%CI=1.16-1.63, p=0.0003; TT+CT vs CC (dominant model): OR=1.12, 95%CI=1.01-1.23, p=0.02). CONCLUSIONS The present meta-analysis strongly suggested a significant association between the MTHFR C677T polymorphism and risk of breast cancer in Asian populations.
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Affiliation(s)
- Vandana Rai
- Department of Biotechnology VBS Purvanchal University Jaunpur, Uttar Pradesh, India E-mail :
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Zhang HD, Jiang LH, Sun DW, Li J, Tang JH. MiR-139-5p: promising biomarker for cancer. Tumour Biol 2015; 36:1355-65. [DOI: 10.1007/s13277-015-3199-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 01/30/2015] [Indexed: 12/22/2022] Open
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Naushad SM, Vijayalakshmi SV, Rupasree Y, Kumudini N, Sowganthika S, Naidu JV, Ramaiah MJ, Rao DN, Kutala VK. Multifactor dimensionality reduction analysis to elucidate the cross-talk between one-carbon and xenobiotic metabolic pathways in multi-disease models. Mol Biol Rep 2015; 42:1211-24. [PMID: 25648260 DOI: 10.1007/s11033-015-3856-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 01/28/2015] [Indexed: 01/14/2023]
Abstract
Putatively functional polymorphisms of one-carbon and xenobiotic metabolic pathways influence susceptibility for wide spectrum of diseases. The current study was aimed to explore gene-gene interactions among these two metabolic pathways in four diseases i.e. breast cancer, systemic lupus erythematosus (SLE), coronary artery disease (CAD) and Parkinson's disease (PD). Multifactor dimensionality reduction analysis was carried out on four case-control datasets. Cross-talk was observed between one-carbon and xenobiotic pathways in breast cancer (RFC 80 G>A, COMT H108L and TYMS 5'-UTR 28 bp tandem repeat) and SLE (CYP1A1 m1, MTRR 66 A>G and GSTT1). Gene-gene interactions within one-carbon metabolic pathway were observed in CAD (GCPII 1561 C>T, SHMT 1420 C>T and MTHFR 677 C>T) and PD (cSHMT 1420 C>T, MTRR 66 A>G and RFC1 80 G>A). These interaction models showed good predictability of risk for PD (The area under the receiver operating characteristic curve (C) = 0.83) and SLE (C = 0.73); and moderate predictability of risk for breast cancer (C = 0.64) and CAD (C = 0.63). Cross-talk between one-carbon and xenobiotic pathways was observed in diseases with female preponderance. Gene-gene interactions within one-carbon metabolic pathway were observed in diseases with male preponderance.
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Affiliation(s)
- Shaik Mohammad Naushad
- School of Chemical and Biotechnology, SASTRA University, Tirumalaisamudram, Thanjavur, 613401, India,
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Naushad SM, Reddy CA, Kumaraswami K, Divyya S, Kotamraju S, Gottumukkala SR, Digumarti RR, Kutala VK. Impact of hyperhomocysteinemia on breast cancer initiation and progression: epigenetic perspective. Cell Biochem Biophys 2014; 68:397-406. [PMID: 23934182 DOI: 10.1007/s12013-013-9720-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Our recent study showing association of hyperhomocysteinemia and hypomethioninemia in breast cancer and other studies indicating association of hyperhomocysteinemia with metastasis and development of drug resistance in breast cancer cells treated with homocysteine lead us to hypothesize that homocysteine might modulate the expression of certain tumor suppressors, i.e., RASSF1, RARβ1, CNND1, BRCA1, and p21, and might influence prognostic markers such as BNIP3 by inducing epigenetic alteration. To demonstrate this hypothesis, we have treated MCF-7 and MDA-MB-231 cells with different doses of homocysteine and observed dose-dependent inhibition of BRCA1 and RASSF1, respectively. In breast cancer tissues, we observed the following expression pattern: BNIP3 > BRCA1 > RARβ1 > CCND1 > p21 > RASSF1. Hyperhomocysteinemia was positively associated with BRAC1 hypermethylation both in breast cancer tissue and corresponding peripheral blood. Peripheral blood CpG island methylation of BRCA1 in all types of breast cancer and methylation of RASSF1 in ER/PR-negative breast cancers showed positive correlation with total plasma homocysteine. The methylation of RASSF1 and BRCA1 was associated with breast cancer initiation as well as progression, while BRCA1 methylation was associated with DNA damage. Vitamin B12 showed inverse association with the methylation at both the loci. RFC1 G80A and cSHMT C1420T variants showed positive association with methylation at both the loci. Genetic variants influencing remethylation step were associated positively with BRCA1 methylation and inversely with RASSF1 methylation. GCPII C1561T variant showed inverse association with BRCA1 methylation. We found good correlation of BRAC1 (r = 0.90) and RASSF1 (0.92) methylation pattern between the breast cancer tissue and the corresponding peripheral blood. To conclude, elevated homocysteine influences methionine dependency phenotype of breast cancer cells and is associated with breast cancer progression by epigenetic modulation of RASSF1 and BRCA1.
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Affiliation(s)
- Shaik Mohammad Naushad
- Department of Clinical Pharmacology and Therapeutics, Nizam's Institute of Medical Sciences (NIMS), Panjagutta, Hyderabad, 500082, Andhra Pradesh, India
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Naushad SM, Hussain T, Al-Attas OS, Prayaga A, Digumarti RR, Gottumukkala SR, Kutala VK. Molecular insights into the association of obesity with breast cancer risk: relevance to xenobiotic metabolism and CpG island methylation of tumor suppressor genes. Mol Cell Biochem 2014; 392:273-80. [PMID: 24676543 DOI: 10.1007/s11010-014-2037-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 03/14/2014] [Indexed: 02/06/2023]
Abstract
Obesity, genetic polymorphisms of xenobiotic metabolic pathway, hypermethylation of tumor suppressor genes, and hypomethylation of proapoptotic genes are known to be independent risk factors for breast cancer. The objective of this study is to evaluate the combined effect of these environmental, genetic, and epigenetic risk factors on the susceptibility to breast cancer. PCR-RFLP and multiplex PCR were used for the genetic analysis of six variants of xenobiotic metabolic pathway. Methylation-specific PCR was used for the epigenetic analysis of four genetic loci. Multifactor dimensionality reduction analysis revealed a significant interaction between the body mass index (BMI) and catechol-O-methyl transferase H108L variant alone or in combination with cytochrome P450 (CYP) 1A1m1 variant. Women with "Luminal A" breast cancer phenotype had higher BMI compared to other phenotypes and healthy controls. There was no association between the BMI and tumor grade. The post-menopausal obese women exhibited lower glutathione levels. BMI showed a positive association with the methylation of extracellular superoxide dismutase (r = 0.21, p < 0.05), Ras-association (RalGDS/AF-6) domain family member 1 (RASSF1A) (r = 0.31, p < 0.001), and breast cancer type 1 susceptibility protein (r = 0.19, p < 0.05); and inverse association with methylation of BNIP3 (r = -0.48, p < 0.0001). To conclude based on these results, obesity increases the breast cancer susceptibility by two possible mechanisms: (i) by interacting with xenobiotic genetic polymorphisms in inducing increased oxidative DNA damage and (ii) by altering the methylome of several tumor suppressor genes.
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Mitochondrial-targeted curcuminoids: a strategy to enhance bioavailability and anticancer efficacy of curcumin. PLoS One 2014; 9:e89351. [PMID: 24622734 PMCID: PMC3951186 DOI: 10.1371/journal.pone.0089351] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 01/20/2014] [Indexed: 12/19/2022] Open
Abstract
Although the anti-cancer effects of curcumin has been shown in various cancer cell types, in vitro, pre-clinical and clinical studies showed only a limited efficacy, even at high doses. This is presumably due to low bioavailability in both plasma and tissues, particularly due to poor intracellular accumulation. A variety of methods have been developed to achieve the selective targeting of drugs to cells and mitochondrion. We used a novel approach by conjugation of curcumin to lipophilic triphenylphosphonium (TPP) cation to facilitate delivery of curcumin to mitochondria. TPP is selectively taken up by mitochondria driven by the membrane potential by several hundred folds. In this study, three mitocurcuminoids (mitocurcuminoids-1, 2, and 3) were successfully synthesized by tagging TPP to curcumin at different positions. ESI-MS analysis showed significantly higher uptake of the mitocurcuminoids in mitochondria as compared to curcumin in MCF-7 breast cancer cells. All three mitocurcuminoids exhibited significant cytotoxicity to MCF-7, MDA-MB-231, SKNSH, DU-145, and HeLa cancer cells with minimal effect on normal mammary epithelial cells (MCF-10A). The IC50 was much lower for mitocurcuminoids when compared to curcumin. The mitocurcuminoids induced significant ROS generation, a drop in ΔØm, cell-cycle arrest and apoptosis. They inhibited Akt and STAT3 phosphorylation and increased ERK phosphorylation. Mitocurcuminoids also showed upregulation of pro-apoptotic BNIP3 expression. In conclusion, the results of this study indicated that mitocurcuminoids show substantial promise for further development as a potential agent for the treatment of various cancers.
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21
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Association between the CYP1A1 T3801C polymorphism and risk of cancer: Evidence from 268 case–control studies. Gene 2014. [DOI: 10.1016/j.gene.2013.10.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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22
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Krishnan K, Steptoe AL, Martin HC, Pattabiraman DR, Nones K, Waddell N, Mariasegaram M, Simpson PT, Lakhani SR, Vlassov A, Grimmond SM, Cloonan N. miR-139-5p is a regulator of metastatic pathways in breast cancer. RNA (NEW YORK, N.Y.) 2013; 19:1767-1780. [PMID: 24158791 PMCID: PMC3884652 DOI: 10.1261/rna.042143.113] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 09/12/2013] [Indexed: 05/29/2023]
Abstract
Metastasis is a complex, multistep process involved in the progression of cancer from a localized primary tissue to distant sites, often characteristic of the more aggressive forms of this disease. Despite being studied in great detail in recent years, the mechanisms that govern this process remain poorly understood. In this study, we identify a novel role for miR-139-5p in the inhibition of breast cancer progression. We highlight its clinical relevance by reviewing miR-139-5p expression across a wide variety of breast cancer subtypes using in-house generated and online data sets to show that it is most frequently lost in invasive tumors. A biotin pull-down approach was then used to identify the mRNA targets of miR-139-5p in the breast cancer cell line MCF7. Functional enrichment analysis of the pulled-down targets showed significant enrichment of genes in pathways previously implicated in breast cancer metastasis (P < 0.05). Further bioinformatic analysis revealed a predicted disruption to the TGFβ, Wnt, Rho, and MAPK/PI3K signaling cascades, implying a potential role for miR-139-5p in regulating the ability of cells to invade and migrate. To corroborate this finding, using the MDA-MB-231 breast cancer cell line, we show that overexpression of miR-139-5p results in suppression of these cellular phenotypes. Furthermore, we validate the interaction between miR-139-5p and predicted targets involved in these pathways. Collectively, these results suggest a significant functional role for miR-139-5p in breast cancer cell motility and invasion and its potential to be used as a prognostic marker for the aggressive forms of breast cancer.
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Affiliation(s)
- Keerthana Krishnan
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
| | - Anita L. Steptoe
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
| | - Hilary C. Martin
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
| | | | - Katia Nones
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
| | - Nic Waddell
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
| | - Mythily Mariasegaram
- The University of Queensland, UQ Centre for Clinical Research (UQCCR), Herston, QLD, Australia 4029
| | - Peter T. Simpson
- The University of Queensland, UQ Centre for Clinical Research (UQCCR), Herston, QLD, Australia 4029
| | - Sunil R. Lakhani
- The University of Queensland, UQ Centre for Clinical Research (UQCCR), Herston, QLD, Australia 4029
- The University of Queensland, School of Medicine, Herston, QLD, Australia 4029
- Pathology Queensland, The Royal Brisbane and Women's Hospital, Herston, QLD, Australia 4029
| | | | - Sean M. Grimmond
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1BD, United Kingdom
| | - Nicole Cloonan
- Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia 4072
- QIMR Berghofer Medical Research Institute, Genomic Biology Laboratory, Herston, Australia 4006
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Divyya S, Naushad SM, Murthy PVLN, Reddy CR, Kutala VK. GCPII modulates oxidative stress and prostate cancer susceptibility through changes in methylation of RASSF1, BNIP3, GSTP1 and Ec-SOD. Mol Biol Rep 2013; 40:5541-50. [PMID: 23979608 DOI: 10.1007/s11033-013-2655-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 08/19/2013] [Indexed: 12/30/2022]
Abstract
Glutamate carboxypeptidase II (GCPII) haplotypes were found to influence susceptibility to prostate cancer. In the current study, we have elucidated the impact of these haplotypes on the expression of PSMA, BNIP3, Ec-SOD, GSTP1 and RASSF1 genes to understand the epigenetic basis of oxidative stress and prostate cancer risk. Expression analysis was carried out by RT-PCR. Bisulphite treated DNA was subjected to MS-PCR and COBRA for epigenetic studies. Plasma MDA and glutathione levels were measured. In prostate cancer, upregulation of BNIP3 (204.4 ± 23.77 vs. 143.9 ± 16.42 %, p = 0.03); and downregulation of Ec-SOD (105.8 ± 13.69 vs. 176.3 ± 21.1 %, p = 0.027) and RASSF1A (16.67 ± 16.0 vs. 90.8 ± 8.5 %, p = 0.0048) was observed. Hypomethylation of BNIP3 (31.25 ± 16.19 vs. 45.70 ± 2.42 %, p < 0.0001), hypermethylation of Ec-SOD (71.4 ± 6.75 vs. 10.0 ± 3.78 %, p < 0.0001) and RASSF1 (76.25 ± 12.53 vs. 30.0 ± 8.82 %, p = 0.0077) was observed in prostate cancer. The gene expression signature of PSMA, BNIP3, Ec-SOD, GSTP1, clearly demarcated cases and controls (AUC = 0.89 in the ROC curve). D191V variant of GCPII showed positive association with oxidative stress and inverse association with Ec-SOD expression. H475Y variant showed positive association with Ec-SOD expression and inverse association with oxidative stress. R190W variant was found to reduce oxidative stress by increasing glutathione levels. GCPII genetic variants contribute to increased oxidative stress and prostate cancer risk by modulating the CpG island methylation of Ec-SOD.
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Affiliation(s)
- Shree Divyya
- Departments of Clinical Pharmacology and Therapeutics, Nizam's Institute of Medical Sciences (NIMS), Panjagutta, Hyderabad, 500082, India
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Divyya S, Naushad SM, Addlagatta A, Murthy PVLN, Reddy CR, Digumarti RR, Gottumukkala SR, Subbarao SA, Kutala VK. Association of glutamate carboxypeptidase II (GCPII) haplotypes with breast and prostate cancer risk. Gene 2012; 516:76-81. [PMID: 23266799 DOI: 10.1016/j.gene.2012.11.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 06/27/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
Abstract
In view of the pivotal role of glutamate carboxypeptidase II (GCPII) in carcinogenesis, its expression as prostate specific membrane antigen (PSMA) and folate hydrolase (FOLH1) may be influenced by its haplotypes, contributing to the etiology of prostate and breast cancer. To test this hypothesis, breast and prostate cancer cases and controls were subjected to whole gene screening of GCPII and correlated with plasma folate levels and PSMA expression. The impact of variants on a 3-dimensional structure of GCPII was explored by in silico studies. Six novel variations i.e. V108A, P160S, Y176H, D191V, G206R and G245S; and two known variations i.e. R190W and H475Y were identified in GCPII. All-wild haplotype and a haplotype harbouring D191V showed association with breast cancer risk while haplotypes harbouring V108A and P160S reduced the risk. Haplotypes with V108A and G245S variants showed increased risk for prostate cancer due to high PSMA expression while P160S conferred protection against prostate cancer. In silico studies suggests that P160S and R190W variants result in relaxed substrate binding facilitating either rapid catalysis or exchange of substrates and products in the active site which was substantiated by high plasma folate levels associated with these variants. On the contrary, D191V was associated with very low plasma folate levels despite having a high PSMA expression. This is the first comprehensive study examining variations in GCPII in relation to breast and prostate cancer risk. Changes in the plasma folate levels and changes in PSMA expression are associated with breast and prostate cancer risk respectively.
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Affiliation(s)
- Shree Divyya
- Department of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences, India
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25
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Oxidative stress in coronary artery disease: epigenetic perspective. Mol Cell Biochem 2012; 374:203-11. [DOI: 10.1007/s11010-012-1520-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 11/07/2012] [Indexed: 01/24/2023]
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26
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Qin X, Peng Q, Qin A, Chen Z, Lin L, Deng Y, Xie L, Xu J, Li H, Li T, Li S, Zhao J. Association of COMT Val158Met polymorphism and breast cancer risk: an updated meta-analysis. Diagn Pathol 2012; 7:136. [PMID: 23039364 PMCID: PMC3543196 DOI: 10.1186/1746-1596-7-136] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 10/05/2012] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Catechol-O-methyltransferase (COMT) is one of the most important enzymes involved in estrogen metabolism and its functional genetic polymorphisms may be associated with breast cancer (BC) risk. Many epidemiological studies have been conducted to explore the association between the COMT Val158Met polymorphism and breast cancer risk. However, the results remain inconclusive. In order to derive a more precise estimation of this relationship, a large meta-analysis was performed in this study. METHODS Systematic searches of the PubMed, Embase and Cochrane Library were performed. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to estimate the strength of the association. RESULTS A total of 56 studies including 34,358 breast cancer cases and 45,429 controls were included. Overall, no significant associations between the COMT Val158Met polymorphism and breast cancer risk were found for LL versus HH, HL versus HH, LL versus HL, recessive model LL versus HL+HH, and dominant model LL+HL versus HH. In subgroup analysis by ethnicity, source of controls, and menopausal status, there was still no significant association detected in any of the genetic models. CONCLUSION Our meta-analysis results suggest that the COMT Val158Met polymorphism may not contribute to breast cancer susceptibility. VIRTUAL SLIDES The virtual slides(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs4806123577708417.
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Affiliation(s)
- Xue Qin
- Department of Clinical Laboratory, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi, China
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Kamel M, Shouman S, El-Merzebany M, Kilic G, Veenstra T, Saeed M, Wagih M, Diaz-Arrastia C, Patel D, Salama S. Effect of tumour necrosis factor-alpha on estrogen metabolic pathways in breast cancer cells. J Cancer 2012; 3:310-21. [PMID: 22866165 PMCID: PMC3408695 DOI: 10.7150/jca.4584] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Accepted: 06/19/2012] [Indexed: 01/07/2023] Open
Abstract
Tumor necrosis factor-alpha (TNF-α) is a proinflammatory cytokine that has been linked to breast cancer development. Estrogen metabolic pathway is also involved in breast carcinogenesis and DNA adducts formation. In this study we investigated the effect of TNF-α on the estrogen metabolic pathway in MCF-7, a breast cancer cell line. Capillary liquid chromatography/mass spectrometry (LC/MS) and High performance liquid chromatography (HPLC) were used for analysis of estrogen metabolites and estrogen-DNA adducts levels respectively. Reporter gene assay, Real time reverse transcription polymerase chain reaction (real time RT-PCR) and Western blot were used to assess the expression of estrogen metabolizing genes and enzymes. TNF-α significantly increased the total EM and decreased the estrone (E1) / 17-β estradiol (E2) ratio. Moreover, it altered the expression of genes and enzymes involved in E2 activation and deactivation pathways e.g. Cytochrome P-450 1A1 (CYP1A1), Cytochrome P-450 1B1 (CYP1B1), Catechol-O-methyl transferase (COMT) and Nicotinamide adenine dinucleotide phosphate-quinone oxidoreductase 1 (NQO1). In addition, there were increased levels of some catechol estrogens e.g. 4-hydroxy-estrone (4-OHE1) and 2-hydroxyestradiol (2-OHE2) with decreased levels of methylated catechols e.g. 2-methoxy estradiol (2-MeOE2). DNA adducts especially 4-OHE1-[2]-1-N3 Adenine was significantly increased. TNF-α directs the estrogen metabolism into more hormonally active and carcinogenic products in MCF-7. This may implicate a new possible explanation for inflammation associated breast cancer.
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Affiliation(s)
- Marwa Kamel
- 1. Unit of Pharmacology, Department of Cancer Biology, National Cancer Institute, Cairo University, Egypt
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Divyya S, Naushad SM, Addlagatta A, Murthy P, Reddy CR, Digumarti RR, Gottumukkala SR, Kumar A, Rammurti S, Kutala VK. Paradoxical role of C1561T glutamate carboxypeptidase II (GCPII) genetic polymorphism in altering disease susceptibility. Gene 2012; 497:273-9. [DOI: 10.1016/j.gene.2012.01.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 12/12/2011] [Accepted: 01/21/2012] [Indexed: 10/14/2022]
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Zhou JY, Shi R, Yu HL, Zeng Y, Zheng WL, Ma WL. The association between two polymorphisms in the TS gene and risk of cancer: a systematic review and pooled analysis. Int J Cancer 2012; 131:2103-16. [PMID: 22307944 DOI: 10.1002/ijc.27465] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 01/24/2012] [Indexed: 12/26/2022]
Abstract
Thymidylate synthase (TS) is an important enzyme involved in folate metabolism and catalyzes methylation of deoxyuridine monophosphate to deoxythymidine monophosphate, which is essential for DNA replication. Thymidylate synthase enhancer region (TSER) and TS1494del6, two functionally important and ethnically diverse polymorphisms mapping to its gene region, are the most extensively studied. Considering the potential influence of altering TS activity, it is plausible that TS polymorphisms might play a role in the development of cancer. Although the effects of TS polymorphisms on susceptibility to human cancer have been investigated in many studies, the results remain conflicting rather than conclusive. To resolve these conflicts, we performed a quantitative synthesis of the evidence on the association between these two polymorphisms and cancer risk, including 63 studies (19,707 cases and 27,398 controls) for TSER polymorphism and 39 studies (13,489 cases and 16,297 controls) for TS1494del6 polymorphism. Our meta-analysis suggested that these two polymorphisms are not associated with cancer risk when all studies were pooled together. In the stratified analyses, we found that individuals with 2R/2R genotype had a significantly higher cancer risks among Asians (2R/2R vs. 3R/3R: odds ratio [OR] = 1.24, 95% confidence interval (95% CI) = 1.05-1.45; recessive model: OR = 1.23, 95% CI = 1.05-1.44). Further analyses revealed that 2R/2R genotype was significantly associated with an increased risk of gastroesophageal cancer among Asians, whereas it might provide protecting effects against colorectal cancer risk in a dominant genetic model for Caucasians. Additionally, TS1494del6 polymorphism may contribute to genetic susceptibility of breast cancer among Asians.
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Affiliation(s)
- Jue-Yu Zhou
- Institute of Genetic Engineering, Southern Medical University, Guangzhou, People's Republic of China
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