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Lozon L, Ramadan WS, Kawaf RR, Al-Shihabi AM, El-Awady R. Decoding cell death signalling: Impact on the response of breast cancer cells to approved therapies. Life Sci 2024; 342:122525. [PMID: 38423171 DOI: 10.1016/j.lfs.2024.122525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 02/04/2024] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Breast cancer is a principal cause of cancer-related mortality in female worldwide. While many approved therapies have shown promising outcomes in treating breast cancer, understanding the intricate signalling pathways controlling cell death is crucial for optimizing the treatment outcome. A growing body of evidence has unveiled the aberrations in multiple cell death pathways across diverse cancer types, highlighting these pathways as appealing targets for therapeutic interventions. In this review, we provide a comprehensive overview of the current state of knowledge on the cell death signalling mechanisms with a particular focus on their impact on the response of breast cancer cells to approved therapies. Additionally, we discuss the potentials of combination therapies that exploit the synergy between approved drugs and therapeutic agents targeting modulators of cell death pathways.
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Affiliation(s)
- Lama Lozon
- College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates; Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Wafaa S Ramadan
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Rawan R Kawaf
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Aya M Al-Shihabi
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Raafat El-Awady
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.
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Chen J, Li H, Wu Y, Li Y, Liao S. Shared genetic links between bladder cancer and obesity-related traits: A conjunctional false discovery rate study. Medicine (Baltimore) 2023; 102:e35145. [PMID: 37800791 PMCID: PMC10552987 DOI: 10.1097/md.0000000000035145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/18/2023] [Indexed: 10/07/2023] Open
Abstract
Bladder cancer (BCa) is a common cancer worldwide and is often linked with obesity-related comorbidities, but little is known about the underlying genetic mechanisms. To investigate these mechanisms, we used various quantitative tools, including conditional quantile-quantile (Q-Q) plots, conditional false discovery rate (cFDR), and conjunctional conditional false discovery rate (ccFDR), to explore the pleiotropic enrichment of risk loci between BCa and obesity-related traits. We also performed an expression quantitative trait locus (eQTL) analysis to assess the relationship between shared risk loci and gene expression. Finally, we conducted functional annotation using Kyoto Encyclopedia of Genes and Genomes (KEGG) and gene ontology (GO) analysis. Our findings indicated that there was successive enrichment for a range of obesity-related traits, including body fat percentage, body mass index, fasting insulin, type 2 diabetes mellitus, fasting glucose, high-density lipoprotein cholesterol, total triglycerides, and waist-to-hip ratio. Using the tools mentioned above, we identified 18 significant SNPs and 18 closely related genes (cFDR<0.01) under the condition of 8 obesity-related traits. The SNPs included rs143004880, rs73301337, rs10798572, rs11594929, rs17019138, rs2877, rs149795948, rs142509736, rs12727575, rs1571277, rs12131828, rs635634, rs76895963, rs118081211, rs7044247, rs138895564, rs4135275, and rs148023060. Additionally, we identified 15 novel loci using ccFDR, including rs143004880, rs73301337, rs10798572, rs11594929, rs17019138, rs2877, rs142509736, rs1571277, rs635634, rs76895963, rs12131828, rs118081211, rs7044247, rs138895564, and rs4135275. Of the 2 significant loci that modify gene expression, rs12131828 and rs635634 were identified. The functional annotation indicated that the conditional risk genes mainly participated in the regulation of gene silencing. Our study provided evidence of pleiotropic enrichment between BCa and 8 obesity-related traits, and we identified potential genetic mechanisms underlying this relationship. These findings may help in developing targeted clinical treatments for BCa.
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Affiliation(s)
- Jiaqi Chen
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming, Fujian, China
| | - Hu Li
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Yongyang Wu
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming, Fujian, China
| | - Yahui Li
- Department of Traditional Chinese Medicine, Affiliated Sanming First Hospital, Fujian Medical University, Sanming, Fujian, China
| | - Shangfan Liao
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming, Fujian, China
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Liu W, Cheng L, Du Y, Liu X, Ma J, Yan L. 6-(7-Nitro-2,1,3-benzoxadiazol-4-ylthio) Hexanol Inhibits Proliferation and Induces Apoptosis of Endometriosis by Regulating Glutathione S-Transferase Mu Class 4. Reprod Sci 2023; 30:2945-2961. [PMID: 36928896 DOI: 10.1007/s43032-023-01207-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 02/28/2023] [Indexed: 03/18/2023]
Abstract
Endometriosis is a chronic disease associated with a disrupted oxidative balance and chronic inflammation. In this study, we investigated the role of glutathione S-transferase Mu class 4 (GSTM4) in endometriosis and determined whether 6-(7-nitro-2,1,3-benzoxadiazol-4-ylthio) hexanol (NBDHEX) regulates GSTM4 expression to affect cellular functions and oxidative stress. GSTM4 expression was detected by immunohistochemistry in endometrium from 15 endometriosis patients and 15 healthy controls. Western blotting was used to detect the expression of GSTM4, proliferating cell nuclear antigen (PCNA), matrix metalloproteinase-9 (MMP-9), Survivin, B-cell lymphoma-extra-large (Bcl-XL), Bax, kelch-like ECH-associated protein 1 (Keap1), and nuclear factor-erythroid 2-related factor 2 (Nrf2) in primary endometrial stromal cells with endometriosis (EESC) and normal endometrial stromal cells (NESC). The effects of NBDHEX on cell proliferation, migration, and invasion were evaluated using Cell Counting Kit-8 (CCK8) and Transwell assays. Apoptosis was detected by flow cytometry. The expression of GSTM4 was significantly increased in endometrium from endometriosis patients. Upon NBDHEX treatment, ESC exhibited reduced proliferation, migration and invasion abilities, and increased apoptosis. NBDHEX decreased the expression of endometriosis prognostic markers (PCNA and MMP-9) and anti-apoptotic proteins (Survivin and Bcl-xl), while it increased the expression of the apoptotic protein Bax. It had no effect on Keap1 expression, and it decreased the expression of Nrf2. The effect of siRNA-mediated knockdown of GSTM4 was similar to that of suppressing GSTM4 expression with NBDHEX treatment. These results indicate that GSTM4 is highly expressed in endometriosis and its expression is inhibited by NBDHEX. Decreased expression of GSTM4 inhibits cell growth, migration, and invasion, and negatively regulates Nrf2 to affect oxidative stress-induced apoptosis. Our results suggest that GSTM4 may play a role in ameliorating the progression of endometriosis. NBDHEX may have therapeutic potential in the treatment of endometriosis.
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Affiliation(s)
- Wei Liu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- Department of Obstetrics and Gynecology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical, University, Taiyuan, 030032, Shanxi, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lei Cheng
- Department of Gynecology Oncology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, China
| | - Yanbo Du
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
| | - Xiaoqiang Liu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Reproductive Medicine Center, Qingdao Women and Children's Hospital, Qingdao, 266034, Shandong, China
| | - Jinlong Ma
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
| | - Lei Yan
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China.
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Pathania K, Sah SP, Salunke DB, Jain M, Yadav AK, Yadav VG, Pawar SV. Green synthesis of lignin-based nanoparticles as a bio-carrier for targeted delivery in cancer therapy. Int J Biol Macromol 2023; 229:684-695. [PMID: 36603714 DOI: 10.1016/j.ijbiomac.2022.12.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/12/2022] [Accepted: 12/28/2022] [Indexed: 01/03/2023]
Abstract
Polymeric magnetic nanoparticles have shown higher efficacy in cancer diagnosis and treatment than conventional chemotherapies. Lignin is an abundantly available natural polymer that can be selectively modified using a rapidly expanding toolkit of biocatalytic and chemical reactions to yield 'intelligent' theranostic-nanoprobes. We aim to valorize lignin to develop a natural polymeric-magnetic-nano-system for the targeted delivery of methotrexate. In the current study, we synthesized nanoparticles of lignin and iron oxide with methotrexate using a new approach of anti-solvent precipitation with ultrasonication. The ensuing nanoparticles are magnetic, smooth, polyhedral with characteristic dimension of 110-130 nm. The drug loading and encapsulation efficiencies were calculated to be 66.06 % and 64.88 %, respectively. The nanoparticles exhibit a concentration-dependent release of methotrexate for the initial 24 h, followed by sustained release. Moreover, formulation is non-hemolytic and scavenges radicals owing to the antioxidant property of lignin. Additionally, methotrexate delivered using the nanoparticles exhibited higher cytotoxicity in cellular-viability assays employing breast cancer and macrophage cell lines compared to the pure form of the drug. Synergistic action of lignin, iron oxide, and methotrexate contribute to enhanced caspase-3 activity and reduced glutathione levels in the breast cancer cells, as well as elevated internalization of the drug on account of increased receptor-mediated endocytosis.
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Affiliation(s)
- Khushboo Pathania
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Sangeeta P Sah
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Deepak B Salunke
- Department of Chemistry and Centre of Advanced Studies, Panjab University, Chandigarh, India; National Interdisciplinary Centre of Vaccine, Immunotherapeutics & Antimicrobials, Panjab University, Chandigarh, India
| | - Manish Jain
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Ashok Kumar Yadav
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Vikramaditya G Yadav
- Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada; School of Biomedical Engineering, The University of British Columbia, Vancouver, BC, Canada
| | - Sandip V Pawar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India.
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Renatino Canevarolo R, Pereira de Souza Melo C, Moreno Cury N, Luiz Artico L, Ronchi Corrêa J, Tonhasca Lau Y, Sousa Mariano S, Reddy Sudalagunta P, Regina Brandalise S, Carolina de Mattos Zeri A, Andrés Yunes J. Glutathione levels are associated with methotrexate resistance in acute lymphoblastic leukemia cell lines. Front Oncol 2022; 12:1032336. [PMID: 36531023 PMCID: PMC9751399 DOI: 10.3389/fonc.2022.1032336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/02/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction Methotrexate (MTX), a folic acid antagonist and nucleotide synthesis inhibitor, is a cornerstone drug used against acute lymphoblastic leukemia (ALL), but its mechanism of action and resistance continues to be unraveled even after decades of clinical use. Methods To better understand the mechanisms of this drug, we accessed the intracellular metabolic content of 13 ALL cell lines treated with MTX by 1H-NMR, and correlated metabolome data with cell proliferation and gene expression. Further, we validated these findings by inhibiting the cellular antioxidant system of the cells in vitro and in vivo in the presence of MTX. Results MTX altered the concentration of 31 out of 70 metabolites analyzed, suggesting inhibition of the glycine cleavage system, the pentose phosphate pathway, purine and pyrimidine synthesis, phospholipid metabolism, and bile acid uptake. We found that glutathione (GSH) levels were associated with MTX resistance in both treated and untreated cells, suggesting a new constitutive metabolic-based mechanism of resistance to the drug. Gene expression analyses showed that eight genes involved in GSH metabolism were correlated to GSH concentrations, 2 of which (gamma-glutamyltransferase 1 [GGT1] and thioredoxin reductase 3 [TXNRD3]) were also correlated to MTX resistance. Gene set enrichment analysis (GSEA) confirmed the association between GSH metabolism and MTX resistance. Pharmacological inhibition or stimulation of the main antioxidant systems of the cell, GSH and thioredoxin, confirmed their importance in MTX resistance. Arsenic trioxide (ATO), a thioredoxin inhibitor used against acute promyelocytic leukemia, potentiated MTX cytotoxicity in vitro in some of the ALL cell lines tested. Likewise, the ATO+MTX combination decreased tumor burden and extended the survival of NOD scid gamma (NSG) mice transplanted with patient-derived ALL xenograft, but only in one of four ALLs tested. Conclusion Altogether, our results show that the cellular antioxidant defense systems contribute to leukemia resistance to MTX, and targeting these pathways, especially the thioredoxin antioxidant system, may be a promising strategy for resensitizing ALL to MTX.
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Affiliation(s)
| | | | | | | | | | - Yanca Tonhasca Lau
- Centro de Pesquisa Boldrini, Centro Infantil Boldrini, Campinas, SP, Brazil
| | | | - Praneeth Reddy Sudalagunta
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, United States
| | | | - Ana Carolina de Mattos Zeri
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil
| | - José Andrés Yunes
- Centro de Pesquisa Boldrini, Centro Infantil Boldrini, Campinas, SP, Brazil,Medical Genetics Department, Faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil,*Correspondence: José Andrés Yunes,
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Zhao J, Wang L, Li Y, Zhao W, Kang S. Hypomethylation of the GSTM1 promoter is associated with ovarian endometriosis. Hum Reprod 2020; 34:804-812. [PMID: 30989213 DOI: 10.1093/humrep/dez039] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/16/2019] [Accepted: 02/27/2019] [Indexed: 01/10/2023] Open
Abstract
STUDY QUESTION Is the methylation status of the glutathione S-transferase M1 (GSTM1) promoter region altered in patients with ovarian endometriosis, and does this affect the expression of GSTM1 in their endometrial tissues? SUMMARY ANSWER The promoter region of GSTM1 was significantly hypomethylated in the ectopic and eutopic endometrium of patients with ovarian endometriosis and this was associated with higher expression of GSTM1 mRNA. WHAT IS KNOWN ALREADY GSTM1, a member of the glutathione S-transferase family, is primarily known as a detoxification enzyme, but it has also been shown to negatively regulate apoptosis-related signalling cascades through protein-protein interactions with apoptosis signal-regulating kinase-1. STUDY DESIGN, SIZE, DURATION This is a case-control study between September 2013 and December 2016, involving 65 patients with ovarian endometriosis and 53 women without endometriosis. We analysed the methylation status and expression levels of GSTM1 in the ectopic and eutopic endometrium of patients with ovarian endometriosis and the endometrium of women without endometriosis. In addition, we collected endometrial samples from 12 women without endometriosis for endometrial epithelial cell cultures. PARTICIPANTS/MATERIALS, SETTING, METHODS Methylation levels of the GSTM1 promoter region in the ectopic and eutopic endometrial tissues of patients with ovarian endometriosis and the endometrial tissues of women without endometriosis were analysed by pyrosequencing. The expression of GSTM1 mRNA and protein in endometrial tissues was investigated by RT-qPCR and immunohistochemistry, respectively. Primary cell culture, gene transfection, Cell Counting Kit-8 assay and flow cytometry were used to analyse the effect of GSTM1 on viability and apoptosis in endometrial epithelial cells. MAIN RESULTS AND THE ROLE OF CHANCE Compared with that in the endometrium of women without endometriosis, the GSTM1 promoter region was significantly hypomethylated in the ectopic and eutopic endometrium of patients with ovarian endometriosis. Additionally, GSTM1 mRNA and protein levels were significantly higher in the ectopic and eutopic endometrium than in the control endometrium. Moreover, the methylation levels of the GSTM1 promoter region were significantly negatively correlated with the mRNA expression of GSTM1. Furthermore, in vitro results suggested that the over-expression of GSTM1 could significantly increase viability and inhibit apoptosis in endometrial epithelial cells following hormone treatment and withdrawal. LIMITATIONS, REASONS FOR CAUTION Due to restrictions in the isolation and culture of pure populations of endometrial epithelial cells, as well as limitations in the number of passages possible in primary cells, we could not explore the underlying molecular mechanism by which GSTM1 modulates apoptosis in endometrial cells. WIDER IMPLICATIONS OF THE FINDINGS This study provides new evidence to support the notion that endometriosis may be an epigenetic disease. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by grants from the Natural Science Foundation of Hebei Province (Grant number: H2018206200) and the Department of Education of Hebei Province (Grant number: CXZZBS2017114). The authors have no conflicts of interest to declare.
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Affiliation(s)
- Jian Zhao
- Department of Gynecology, Fourth Hospital, Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Lixian Wang
- Department of Gynecology, Fourth Hospital, Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Yan Li
- Department of Molecular Biology, Fourth Hospital, Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Wei Zhao
- Department of Gynecology, Fourth Hospital, Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Shan Kang
- Department of Gynecology, Fourth Hospital, Hebei Medical University, Shijiazhuang, Hebei, PR China
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Yang Y, Wu L, Shu XO, Cai Q, Shu X, Li B, Guo X, Ye F, Michailidou K, Bolla MK, Wang Q, Dennis J, Andrulis IL, Brenner H, Chenevix-Trench G, Campa D, Castelao JE, Gago-Dominguez M, Dörk T, Hollestelle A, Lophatananon A, Muir K, Neuhausen SL, Olsson H, Sandler DP, Simard J, Kraft P, Pharoah PDP, Easton DF, Zheng W, Long J. Genetically Predicted Levels of DNA Methylation Biomarkers and Breast Cancer Risk: Data From 228 951 Women of European Descent. J Natl Cancer Inst 2020; 112:295-304. [PMID: 31143935 PMCID: PMC7073907 DOI: 10.1093/jnci/djz109] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 05/08/2019] [Accepted: 05/22/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND DNA methylation plays a critical role in breast cancer development. Previous studies have identified DNA methylation marks in white blood cells as promising biomarkers for breast cancer. However, these studies were limited by low statistical power and potential biases. Using a new methodology, we investigated DNA methylation marks for their associations with breast cancer risk. METHODS Statistical models were built to predict levels of DNA methylation marks using genetic data and DNA methylation data from HumanMethylation450 BeadChip from the Framingham Heart Study (n = 1595). The prediction models were validated using data from the Women's Health Initiative (n = 883). We applied these models to genomewide association study (GWAS) data of 122 977 breast cancer patients and 105 974 controls to evaluate if the genetically predicted DNA methylation levels at CpG sites (CpGs) are associated with breast cancer risk. All statistical tests were two-sided. RESULTS Of the 62 938 CpG sites CpGs investigated, statistically significant associations with breast cancer risk were observed for 450 CpGs at a Bonferroni-corrected threshold of P less than 7.94 × 10-7, including 45 CpGs residing in 18 genomic regions, that have not previously been associated with breast cancer risk. Of the remaining 405 CpGs located within 500 kilobase flaking regions of 70 GWAS-identified breast cancer risk variants, the associations for 11 CpGs were independent of GWAS-identified variants. Integrative analyses of genetic, DNA methylation, and gene expression data found that 38 CpGs may affect breast cancer risk through regulating expression of 21 genes. CONCLUSION Our new methodology can identify novel DNA methylation biomarkers for breast cancer risk and can be applied to other diseases.
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Affiliation(s)
- Yaohua Yang
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Lang Wu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Xiao-Ou Shu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Qiuyin Cai
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Xiang Shu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Bingshan Li
- Department of Molecular Physiology and Biophysics, Vanderbilt Genetics Institute, Vanderbilt University, Nashville, TN
| | - Xingyi Guo
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Fei Ye
- Division of Cancer Biostatistics, Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN
| | - Kyriaki Michailidou
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Manjeet K Bolla
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Qin Wang
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | | | - Irene L Andrulis
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- Fred A. Litwin Center for Cancer Genetics, Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research (HB) and German Cancer Consortium (HB), German Cancer Research Center, Heidelberg, Germany; Division of Preventive Oncology, German Cancer Research Center and National Center for Tumor Diseases, Heidelberg, Germany
| | - Georgia Chenevix-Trench
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Daniele Campa
- Department of Biology, University of Pisa, Pisa, Italy
| | - Jose E Castelao
- Oncology and Genetics Unit, Instituto de Investigación Biomedica Orense-Pontevedra-Vigo, Xerencia de Xestión Integrada de Vigo-SERGAS, Vigo, Spain
| | - Manuela Gago-Dominguez
- Genomic Medicine Group, Galician Foundation of Genomic Medicine, Instituto de Investigación Sanitaria de Santiago de Compostela, Complejo Hospitalario Universitario de Santiago, SERGAS, Santiago De Compostela, Spain
- Moores Cancer Center, University of California San Diego, La Jolla, CA
| | - Thilo Dörk
- Gynaecology Research Unit, Hannover Medical School, Hannover, Germany
| | - Antoinette Hollestelle
- Department of Medical Oncology, Family Cancer Clinic, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Artitaya Lophatananon
- Division of Health Sciences, Warwick Medical School, Warwick University, Coventry, UK
- Institute of Population Health, University of Manchester, Manchester, UK
| | - Kenneth Muir
- Division of Health Sciences, Warwick Medical School, Warwick University, Coventry, UK
- Institute of Population Health, University of Manchester, Manchester, UK
| | - Susan L Neuhausen
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA
| | - Håkan Olsson
- Department of Cancer Epidemiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Dale P Sandler
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC
| | - Jacques Simard
- Genomics Center, Centre Hospitalier Universitaire de Québec Research Center, Laval University, Québec City, QC, Canada
| | - Peter Kraft
- Program in Genetic Epidemiology and Statistical Genetics, Harvard T. H. Chan School of Public Health (PK) and Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA
| | - Paul D P Pharoah
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Douglas F Easton
- Center for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Wei Zheng
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Jirong Long
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
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Monteiro C, Ferreira de Oliveira JMP, Pinho F, Bastos V, Oliveira H, Peixoto F, Santos C. Biochemical and transcriptional analyses of cadmium-induced mitochondrial dysfunction and oxidative stress in human osteoblasts. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:705-717. [PMID: 29913117 DOI: 10.1080/15287394.2018.1485122] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cadmium (Cd) accumulation is known to occur predominantly in kidney and liver; however, low-level long-term exposure to Cd may also result in bone damage. Few studies have addressed Cd-induced toxicity in osteoblasts, particularly upon cell mitochondrial energy processing and putative associations with oxidative stress in bone. To assess the influence of Cd treatment on mitochondrial function and oxidative status in osteoblast cells, human MG-63 cells were treated with Cd (up to 65 μM) for 24 or 48 h. Intracellular reactive oxygen species (ROS), lipid and protein oxidation and antioxidant defense mechanisms such as total antioxidant activity (TAA) and gene expression of antioxidant enzymes were analyzed. In addition, Cd-induced effects on mitochondrial function were assessed by analyzing the activity of enzymes involved in mitochondrial respiration, membrane potential (ΔΨm), mitochondrial morphology and adenylate energy charge. Treatment with Cd increased oxidative stress, concomitantly with lipid and protein oxidation. Real-time polymerase chain reaction (qRT-PCR) analyses of antioxidant genes catalase (CAT), glutathione peroxidase 1 (GPX1), glutathione S-reductase (GSR), and superoxide dismutase (SOD1 and SOD2) exhibited a trend toward decrease in transcripts in Cd-stressed cells, particularly a downregulation of GSR. Longer treatment with Cd (48 h) resulted in energy charge states significantly below those commonly observed in living cells. Mitochondrial function was affected by ΔΨm reduction. Inhibition of mitochondrial respiratory chain enzymes and citrate synthase also occurred following Cd treatment. In conclusion, Cd induced mitochondrial dysfunction which appeared to be associated with oxidative stress in human osteoblasts.
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Affiliation(s)
- Cristina Monteiro
- a Department of Biology & CESAM , University of Aveiro, Campus Universitário , Aveiro , Portugal
| | - José Miguel P Ferreira de Oliveira
- b LAQV/REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy , University of Porto , Porto , Portugal
| | - Francisco Pinho
- a Department of Biology & CESAM , University of Aveiro, Campus Universitário , Aveiro , Portugal
| | - Verónica Bastos
- c Department of Biology & LAQV/REQUIMTE , Faculty of Sciences of University of Porto , Porto , Portugal
| | - Helena Oliveira
- a Department of Biology & CESAM , University of Aveiro, Campus Universitário , Aveiro , Portugal
| | - Francisco Peixoto
- d Biology and Environment Department , Chemistry Research Center, University of Trás-os-Montes & Alto Douro , Portugal
| | - Conceição Santos
- c Department of Biology & LAQV/REQUIMTE , Faculty of Sciences of University of Porto , Porto , Portugal
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9
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Alavi AS, Meshkini A. Fabrication of poly(ethylene glycol)-coated mesoporous nanocomposite ZnO@Fe2O3 for methotrexate delivery: An integrated nanoplatform for dual-mode cancer therapy. Eur J Pharm Sci 2018; 115:144-157. [DOI: 10.1016/j.ejps.2018.01.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 12/22/2017] [Accepted: 01/11/2018] [Indexed: 12/16/2022]
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10
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Akbulak O, Karadag AS, Akdeniz N, Ozkanli S, Ozlu E, Zemheri E, Oguztuzun S. Evaluation of oxidative stress via protein expression of glutathione S-transferase and cytochrome p450 (CYP450) ısoenzymes in psoriasis vulgaris patients treated with methotrexate. Cutan Ocul Toxicol 2017; 37:180-185. [DOI: 10.1080/15569527.2017.1369431] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ozge Akbulak
- Department of Dermatology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Ayse Serap Karadag
- Department of Dermatology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Necmettin Akdeniz
- Department of Dermatology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Seyma Ozkanli
- Department of Pathology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Emin Ozlu
- Department of Dermatology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Ebru Zemheri
- Department of Pathology, Istanbul Medeniyet University, School of Medicine, SB Goztepe Training and Research Hospital, Istanbul, Turkey
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11
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Meshkini A, Oveisi H. Methotrexate-F127 conjugated mesoporous zinc hydroxyapatite as an efficient drug delivery system for overcoming chemotherapy resistance in osteosarcoma cells. Colloids Surf B Biointerfaces 2017; 158:319-330. [DOI: 10.1016/j.colsurfb.2017.07.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 06/30/2017] [Accepted: 07/02/2017] [Indexed: 01/24/2023]
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12
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Lagoa R, Samhan-Arias AK, Gutierrez-Merino C. Correlation between the potency of flavonoids for cytochrome c reduction and inhibition of cardiolipin-induced peroxidase activity. Biofactors 2017; 43:451-468. [PMID: 28317253 DOI: 10.1002/biof.1357] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 01/16/2017] [Accepted: 02/07/2017] [Indexed: 12/23/2022]
Abstract
There are large differences between flavonoids to protect against apoptosis, a process in which cytochrome c (Cyt c) plays a key role. In this work, we show that 7 of 13 flavonoids studied have a capacity to reduce Cyt c similar or higher than ascorbate, the flavonols quercetin, kaempferol and myricetin, flavanol epigallocatechin-gallate, anthocyanidins cyanidin and malvidin, and the flavone luteolin. In contrast, the kaempferol 3(O)- and 3,4'(O)-methylated forms, the flavanone naringenin, and also apigenin and chrysin, had a negligible reducing capacity. Equilibrium dialysis and quenching of 1,6-diphenyl-1,3,5-hexatriene fluorescence experiments showed that flavonoids did not interfere with Cyt c binding to cardiolipin (CL)/phosphatidylcholine (PC) vesicles. However, the CL-induced loss of Cyt c Soret band intensity was largely attenuated by flavonoids, pointing out a stabilizing action against Cyt c unfolding in the complex. Moreover, flavonoids that behave as Cyt c reductants also inhibited the pro-apoptotic CL-induced peroxidase activity of Cyt c, indicating that modulation of Cyt c signaling are probable mechanisms behind the protective biological activities of flavonoids. © 2016 BioFactors, 43(3):451-468, 2017.
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Affiliation(s)
- Ricardo Lagoa
- ESTG, Polytechnic Institute of Leiria, Morro do Lena, Alto do Vieiro, Leiria, 2411-901, Portugal
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Extremadura, Avenida de Elvas s/n, Badajoz, 06006, Spain
| | - Alejandro K Samhan-Arias
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Extremadura, Avenida de Elvas s/n, Badajoz, 06006, Spain
| | - Carlos Gutierrez-Merino
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Extremadura, Avenida de Elvas s/n, Badajoz, 06006, Spain
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13
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Moreira LB, Maranho LA, Baena-Nogueras RM, Lara-Martín PA, Martín-Díaz ML. Effects of novobiocin and methotrexate on the benthic amphipod Ampelisca brevicornis exposed to spiked sediments. MARINE ENVIRONMENTAL RESEARCH 2016; 122:169-177. [PMID: 27829510 DOI: 10.1016/j.marenvres.2016.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/25/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
The marine amphipod Ampelisca brevicornis was used as model organism of benthic macrofauna to assess the possible adverse effects of pharmaceuticals bound to sediments. Organisms were exposed to sediment spiked with novobiocin (NOV) and methotrexate (MTX) for 10 days in order to estimate the acute toxicity (lethal effects) produced by the two compounds. The surviving organisms were pooled and analyzed to determine their sublethal responses associated with different phases of metabolism (enzyme activities in phases I and II), oxidative stress (antioxidant enzyme activities and lipid peroxidation), and genotoxicity (DNA damage in the form of strand breaks). No lethal or sublethal effects were observed in the amphipods exposed to NOV. For organisms exposed to sediments spiked with MTX the results were found to calculate the concentration that was lethal to 50% of the organisms exposed in the toxicity tests (LC50 of 30.36 ng/g). MTX also induced the metabolism of enzyme detoxification activities in phases I and II. Oxidative stress and DNA damage in particular were also observed, indicating responses associated with MTX's mechanism of action. Both mortality and the set of applied biomarkers allowed for the assessment of bioavailability, oxidative stress, and genotoxicity of NOV and MTX. The information obtained in this investigation can assist in ecological risk assessment of marine sediments contaminated by pharmaceuticals.
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Affiliation(s)
- Lucas Buruaem Moreira
- São Paulo State University "Júlio de Mesquita Filho", Bioscience Institute. Pça. Infante D. Henrique, 11330-900, São Vicente, Brazil; Marine Sciences Institute, Federal University of Ceará, Fortaleza, 60165-081, Brazil.
| | - Luciane Alves Maranho
- São Paulo State University "Júlio de Mesquita Filho", Bioscience Institute. Pça. Infante D. Henrique, 11330-900, São Vicente, Brazil; Physical Chemistry Department, Faculty of Marine and Environmental Sciences, University of Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Rosa María Baena-Nogueras
- Physical Chemistry Department, Faculty of Marine and Environmental Sciences, University of Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Pablo Antonio Lara-Martín
- Physical Chemistry Department, Faculty of Marine and Environmental Sciences, University of Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Maria Laura Martín-Díaz
- Physical Chemistry Department, Faculty of Marine and Environmental Sciences, University of Cádiz, Puerto Real, 11510, Cádiz, Spain
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McGarry DJ, Chakravarty P, Wolf CR, Henderson CJ. Altered protein S-glutathionylation identifies a potential mechanism of resistance to acetaminophen-induced hepatotoxicity. J Pharmacol Exp Ther 2015; 355:137-44. [PMID: 26311813 PMCID: PMC4631951 DOI: 10.1124/jpet.115.227389] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 08/25/2015] [Indexed: 01/01/2023] Open
Abstract
Acetaminophen (APAP) is the most commonly used over-the-counter analgesic. However, hepatotoxicity induced by APAP is a major clinical issue, and the factors that define sensitivity to APAP remain unclear. We have previously demonstrated that mice nulled for glutathione S-transferase Pi (GSTP) are resistant to APAP-induced hepatotoxicity. This study aims to exploit this difference to delineate pathways of importance in APAP toxicity. We used mice nulled for GSTP and heme oxygenase-1 oxidative stress reporter mice, together with a novel nanoflow liquid chromatography-tandem mass spectrometry methodology to investigate the role of oxidative stress, cell signaling, and protein S-glutathionylation in APAP hepatotoxicity. We provide evidence that the sensitivity difference between wild-type and Gstp1/2(-/-) mice is unrelated to the ability of APAP to induce oxidative stress, despite observing significant increases in c-Jun N-terminal kinase and extracellular signal-regulated kinase phosphorylation in wild-type mice. The major difference in response to APAP was in the levels of protein S-glutathionylation: Gstp1/2(-/-) mice exhibited a significant increase in the number of S-glutathionylated proteins compared with wild-type animals. Remarkably, these S-glutathionylated proteins are involved in oxidative phosphorylation, respiratory complexes, drug metabolism, and mitochondrial apoptosis. Furthermore, we found that S-glutathionylation of the rate-limiting glutathione-synthesizing enzyme, glutamate cysteine ligase, was markedly increased in Gstp1/2(-/-) mice in response to APAP. The data demonstrate that S-glutathionylation provides an adaptive response to APAP and, as a consequence, suggest that this is an important determinant in APAP hepatotoxicity. This work identifies potential novel avenues associated with cell survival for the treatment of chemical-induced hepatotoxicity.
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Affiliation(s)
- David J McGarry
- Molecular Pharmacology Group, School of Medicine, Jacqui Wood Cancer Centre, University of Dundee, Dundee, United Kingdom (D.J.M., C.R.W., C.J.H.); and Bioinformatics and Biostatistics Group, Cancer Research UK London Research Institute, London, United Kingdom (P.C.)
| | - Probir Chakravarty
- Molecular Pharmacology Group, School of Medicine, Jacqui Wood Cancer Centre, University of Dundee, Dundee, United Kingdom (D.J.M., C.R.W., C.J.H.); and Bioinformatics and Biostatistics Group, Cancer Research UK London Research Institute, London, United Kingdom (P.C.)
| | - C Roland Wolf
- Molecular Pharmacology Group, School of Medicine, Jacqui Wood Cancer Centre, University of Dundee, Dundee, United Kingdom (D.J.M., C.R.W., C.J.H.); and Bioinformatics and Biostatistics Group, Cancer Research UK London Research Institute, London, United Kingdom (P.C.)
| | - Colin J Henderson
- Molecular Pharmacology Group, School of Medicine, Jacqui Wood Cancer Centre, University of Dundee, Dundee, United Kingdom (D.J.M., C.R.W., C.J.H.); and Bioinformatics and Biostatistics Group, Cancer Research UK London Research Institute, London, United Kingdom (P.C.)
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15
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Manioglu S, Atis M, Aas M, Kiraz A, Bayraktar H. Direct conversion of cytochrome c spectral shifts to fluorescence using photochromic FRET. Chem Commun (Camb) 2014; 50:12333-6. [PMID: 25183463 DOI: 10.1039/c4cc06146b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Photochromic fluorescence resonance energy transfer (pcFRET) was used to monitor the redox activity of non-fluorescent heme protein. Venus fluorescent protein was used as a donor where its emission intensity was reversibly modulated by the absorption change of Cytochrome c.
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Affiliation(s)
- Selen Manioglu
- Department of Chemical and Biological Engineering, Koc University, Istanbul, 34450, Turkey
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16
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Hertz E, Cadoná FC, Machado AK, Azzolin V, Holmrich S, Assmann C, Ledur P, Ribeiro EE, DE Souza Filho OC, Mânica-Cattani MF, DA Cruz IBM. Effect of Paullinia cupana on MCF-7 breast cancer cell response to chemotherapeutic drugs. Mol Clin Oncol 2014; 3:37-43. [PMID: 25469267 DOI: 10.3892/mco.2014.438] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 09/10/2014] [Indexed: 11/05/2022] Open
Abstract
Previous studies suggested that certain plants, such as guarana (Paullinia cupana), exert a protective effect against cancer-related fatigue in breast cancer patients undergoing chemotherapy. However, guarana possesses bioactive molecules, such as caffeine and catechin, which may affect the pharmacological properties of antitumor drugs. Therefore, the aim of this study was to evaluate the effects of guarana on breast cancer cell response to 7 chemotherapeutic agents currently used in the treatment of breast cancer. To perform this study, MCF-7 breast cancer cells were cultured under controlled conditions and exposed to 1, 5 and 10 µg/ml guarana concentrations, with and without chemotherapeutics (gemcitabine, vinorelbine, methotrexate, 5-fluorouracil, paclitaxel, doxorubicin and cyclophosphamide). The effect of these treatments on MCF-7 cell viability and proliferation was spectrophotometrically analyzed with the MTT assay. The main results demonstrated an antiproliferative effect of guarana at concentrations of 5 and 10 µg/ml and a significant effect on chemotherapeutic drug action. In general, guarana improved the antiproliferative effect of chemotherapeutic agents, causing a decrease of >40% in cell growth after 72 h of exposure. The results suggested an interaction of guarana with the chemotherapeutic drugs, which requires confirmation by in vivo complementary studies.
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Affiliation(s)
- Everaldo Hertz
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Francine Carla Cadoná
- Postgraduate Program in Biochemistry and Toxicology, Center of Natural and Exact Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Alencar Kolinski Machado
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Verônica Azzolin
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Sabrina Holmrich
- Postgraduate Program in Biochemistry and Toxicology, Center of Natural and Exact Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Charles Assmann
- Laboratory of Biogenomics, Center of Health Sciences, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Manaus, Amazonas 69050-900, Brazil
| | - Pauline Ledur
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil
| | - Euler Esteves Ribeiro
- Open University of the Third Age, State University of Amazonas, Manaus, Amazonas 69050-900, Brazil
| | - Olmiro Cezimbra DE Souza Filho
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil ; Laboratory of Biogenomics, Center of Health Sciences, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Manaus, Amazonas 69050-900, Brazil
| | - Maria Fernanda Mânica-Cattani
- Postgraduate Program in Biochemistry and Toxicology, Center of Natural and Exact Sciences, Manaus, Amazonas 69050-900, Brazil ; Laboratory of Biogenomics, Center of Health Sciences, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Manaus, Amazonas 69050-900, Brazil
| | - Ivana Beatrice Mânica DA Cruz
- Postgraduate Program in Pharmacology, Center of Health Sciences, Manaus, Amazonas 69050-900, Brazil ; Postgraduate Program in Biochemistry and Toxicology, Center of Natural and Exact Sciences, Manaus, Amazonas 69050-900, Brazil ; Laboratory of Biogenomics, Center of Health Sciences, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Manaus, Amazonas 69050-900, Brazil
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Shahbazi MA, Almeida PV, Mäkilä EM, Kaasalainen MH, Salonen JJ, Hirvonen JT, Santos HA. Augmented cellular trafficking and endosomal escape of porous silicon nanoparticles via zwitterionic bilayer polymer surface engineering. Biomaterials 2014; 35:7488-500. [DOI: 10.1016/j.biomaterials.2014.05.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 05/10/2014] [Indexed: 12/11/2022]
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Villalobos X, Rodríguez L, Prévot J, Oleaga C, Ciudad CJ, Noé V. Stability and immunogenicity properties of the gene-silencing polypurine reverse Hoogsteen hairpins. Mol Pharm 2013; 11:254-64. [PMID: 24251728 DOI: 10.1021/mp400431f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Gene silencing by either small-interference RNAs (siRNA) or antisense oligodeoxynucleotides (aODN) is widely used in biomedical research. However, their use as therapeutic agents is hindered by two important limitations: their low stability and the activation of the innate immune response. Recently, we developed a new type of molecule to decrease gene expression named polypurine reverse Hoogsteen hairpins (PPRHs) that bind to polypyrimidine targets in the DNA. Herein, stability experiments performed in mouse, human, and fetal calf serum and in PC3 cells revealed that the half-life of PPRHs is much longer than that of siRNAs in all cases. Usage of PPRHs with a nicked-circular structure increased the binding affinity to their target sequence and their half-life in FCS when bound to the target. Regarding the innate immune response, we determined that the levels of the transcription factors IRF3 and its phosphorylated form, as well as NF-κB were increased by siRNAs and not by PPRHs; that the expression levels of several proinflammatory cytokines including IL-6, TNF-α, IFN-α, IFN-ß, IL-1ß, and IL-18 were not significantly increased by PPRHs; and that the cleavage and activation of the proteolytic enzyme caspase-1 was not triggered by PPRHs. These determinations indicated that PPRHs, unlike siRNAs, do not activate the innate inflammatory response.
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Affiliation(s)
- Xenia Villalobos
- Department of Biochemistry and Molecular Biology, School of Pharmacy, University of Barcelona , Av. Diagonal 643, E-08028 Barcelona, Spain
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