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Vogelsang TLR, Kast V, Bagnjuk K, Eubler K, Jeevanandan SP, Schmoeckel E, Trebo A, Topalov NE, Mahner S, Mayr D, Mayerhofer A, Jeschke U, Vattai A. RIPK1 and RIPK3 are positive prognosticators for cervical cancer patients and C2 ceramide can inhibit tumor cell proliferation in vitro. Front Oncol 2023; 13:1110939. [PMID: 37197430 PMCID: PMC10183606 DOI: 10.3389/fonc.2023.1110939] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 04/03/2023] [Indexed: 05/19/2023] Open
Abstract
Introduction The enzymes Receptor-interacting serine/threonine-protein kinase 1 (RIPK1) und 3 (RIPK3) as well as the protein Mixed lineage kinase domain like pseudokinase (pMLKL) play a role in the signaling cascade of necroptosis. This is a form of programmed cell death which is caspase-independent. High-risk human papilloma virus infection can inhibit necroptosis. Thereby, a persistent infection and consequently the development of cervical cancer can be triggered. Aim of this study was the analysis of the expression of RIPK1, RIPK3 and pMLKL in cervical cancer tissue and the evaluation of its prognostic value on overall survival, progression-free survival and additional clinical parameters. Methods The expression of RIPK1, RIPK3, and pMLKL in cervical cancer tissue microarrays of n = 250 patients was analyzed immunohistochemically. Further, the effect of C2 ceramide on several cervical cancer cell lines (CaSki, HeLa, SiHa) was examined. C2 ceramide is a biologically active short-chain ceramide that induces necroptosis in human luteal granulosa cells. Results Significantly longer overall survival and progression-free survival rates could be detected in cervical cancer patients expressing nuclear RIPK1 or RIPK3 alone or simultaneously (RIPK1 and RIPK3). Cell viability and proliferation was reduced through C2 ceramide stimulation of cervical cancer cells. Simultaneous stimulation of C2 ceramide and the pan-caspase inhibitor Z-VAD-fmk, or the RIPK1-inhibitor necrostatin-1, partly reversed the negative effect of C2 ceramide on cell viability. This observation could imply that caspase-dependent and -independent forms of cell death, including necroptosis, can occur. AnnexinV-FITC apoptosis staining induced a significant increase in apoptotic cells in CaSki and SiHa cells. The stimulation of CaSki cells with C2 ceramide led to a significant percentual increase in necrotic/intermediate (dying) cells after stimulation with C2 ceramide. In addition, after stimulation with C2 ceramide, CaSki and HeLa cells live cell imaging showed morphological changes which are common for necroptosis. Discussion In conclusion, RIPK1 and RIPK3 are independent positive predictors for overall survival and progression-free survival in cervical cancer patients. C2 ceramide can reduce cell viability and proliferation in cervical cancer cells by inducing most likely both apoptosis and necroptosis.
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Affiliation(s)
- Tilman L. R. Vogelsang
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Verena Kast
- Biomedical Center Munich (BMC), Cell Biology, Anatomy III, Ludwig-Maximilians-University (LMU) Munich, Planegg, Germany
| | - Konstantin Bagnjuk
- Biomedical Center Munich (BMC), Cell Biology, Anatomy III, Ludwig-Maximilians-University (LMU) Munich, Planegg, Germany
| | - Katja Eubler
- Biomedical Center Munich (BMC), Cell Biology, Anatomy III, Ludwig-Maximilians-University (LMU) Munich, Planegg, Germany
| | - Sree Priyanka Jeevanandan
- Biomedical Center Munich (BMC), Cell Biology, Anatomy III, Ludwig-Maximilians-University (LMU) Munich, Planegg, Germany
| | - Elisa Schmoeckel
- Faculty of Medicine, Institute of Pathology, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Anna Trebo
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Nicole Elisabeth Topalov
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Sven Mahner
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Doris Mayr
- Faculty of Medicine, Institute of Pathology, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
| | - Artur Mayerhofer
- Biomedical Center Munich (BMC), Cell Biology, Anatomy III, Ludwig-Maximilians-University (LMU) Munich, Planegg, Germany
| | - Udo Jeschke
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
- Department of Obstetrics and Gynecology, University Hospital Augsburg, Augsburg, Germany
- *Correspondence: Udo Jeschke,
| | - Aurelia Vattai
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University (LMU) Munich, Munich, Germany
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Tummers B, Green DR. The evolution of regulated cell death pathways in animals and their evasion by pathogens. Physiol Rev 2022; 102:411-454. [PMID: 34898294 PMCID: PMC8676434 DOI: 10.1152/physrev.00002.2021] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 09/01/2021] [Accepted: 09/01/2022] [Indexed: 12/21/2022] Open
Abstract
The coevolution of host-pathogen interactions underlies many human physiological traits associated with protection from or susceptibility to infections. Among the mechanisms that animals utilize to control infections are the regulated cell death pathways of pyroptosis, apoptosis, and necroptosis. Over the course of evolution these pathways have become intricate and complex, coevolving with microbes that infect animal hosts. Microbes, in turn, have evolved strategies to interfere with the pathways of regulated cell death to avoid eradication by the host. Here, we present an overview of the mechanisms of regulated cell death in Animalia and the strategies devised by pathogens to interfere with these processes. We review the molecular pathways of regulated cell death, their roles in infection, and how they are perturbed by viruses and bacteria, providing insights into the coevolution of host-pathogen interactions and cell death pathways.
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Affiliation(s)
- Bart Tummers
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
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Koyuncu I, Tülüce Y, Slahaddin Qadir H, Durgun M, Supuran CT. Evaluation of the anticancer potential of a sulphonamide carbonic anhydrase IX inhibitor on cervical cancer cells. J Enzyme Inhib Med Chem 2019; 34:703-711. [PMID: 30810431 PMCID: PMC6394301 DOI: 10.1080/14756366.2019.1579805] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Cervical cancer is a common type of cancer. Carbonic anhydrase IX (CA IX) is an attractive target for tumour therapy, being overexpressed in many cancers. We investigated the anticancer properties of the aromatic sulphonamide S-1 as a CA IX inhibitor on cervical cancer cells (HeLa) positive for CA IX expression and normal prostate epithelial cell line (PNT1-A) negative for CA IX. We examined the cytotoxic, apoptosis, genotoxic, and oxidative stress activity of S-1 on HeLa and PNT1-A cell lines. S-1 induced significant reduction of cell viability, caused apoptosis, and up-regulated ROS production. This decrease in cell survival rate can be attributed to the high level of ROS and apoptosis, which has also been shown to arrest the cell cycle. Our findings indicated that S-1 is more effective on HeLa than PNT1-A. S-1 was able to induce apoptosis of cervical cancer cells and is a possible candidate for future anticancer studies.
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Affiliation(s)
- Ismail Koyuncu
- a Department of Biochemistry, Faculty of Medicine , Harran University , Sanliurfa , Turkey
| | - Yasin Tülüce
- b Department of Medical Biology, Faculty of Medicine , Van Yuzuncu Yil University , Van , Turkey
| | - Hewa Slahaddin Qadir
- b Department of Medical Biology, Faculty of Medicine , Van Yuzuncu Yil University , Van , Turkey
| | - Mustafa Durgun
- c Department of Chemistry, Faculty of Arts and Sciences , Harran University , Sanliurfa , Turkey
| | - Claudiu T Supuran
- d Neurofarba Department, Section of Pharmaceutical and Nutriceutical Sciences , Università degli Studi di Firenze , Sesto Fiorentino (Florence) , Italy
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Haga T, Efird JT, Tugizov S, Palefsky JM. Increased TNF-alpha and sTNFR2 levels are associated with high-grade anal squamous intraepithelial lesions in HIV-positive patients with low CD4 level. PAPILLOMAVIRUS RESEARCH (AMSTERDAM, NETHERLANDS) 2017; 3:1-6. [PMID: 28720441 PMCID: PMC5883208 DOI: 10.1016/j.pvr.2016.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/17/2016] [Accepted: 11/18/2016] [Indexed: 01/28/2023]
Abstract
Compared with HIV-negative individuals, HIV-positive individuals have a higher prevalence of anogenital human papillomavirus (HPV) infection, the causative agent of anogenital cancer. TNF-alpha is a major proinflammatory cytokine. sTNFR2 is the soluble form of one of its receptors and is strongly expressed on stimulated lymphocytes. To further understand the role of TNF-alpha, sTNFR2 and other cytokines in the pathogenesis in HPV-related neoplasia, the profiles of serum cytokines in high-risk patients were analyzed for association with anal lesion status. Patients were categorized into 4 groups based on HIV status (HIV-negative vs. HIV-positive with a CD4+ level <200/uL) and anal lesion status [no lesion, low-grade anal squamous intraepithelial lesion (LSIL) vs. high-grade squamous intraepithelial lesion (HSIL)] based on high resolution anoscopy-guided biopsy. Following adjustment for multiplicity, HIV-negative men with HSIL had lower levels of sTNFR2 than HIV-positive men with low CD4 level and HSIL (p=0.02). HIV-positive men with HSIL had higher levels of TNF-alpha than HIV-negative men with HSIL (p<0.001), as well as HIV-positive men with no lesion or LSIL (p=0.03). The levels of other factors, including IL-1beta, IL-2, IL-4, IL-8, IFN-gamma, GM-CSF, sTNFR1 and DR5, were not significantly different between groups. Although the sample size was small, these results suggest that systemic activation of TNF-alpha/sTNFR2 in HIV-positive patients with a low CD4 level may promote the development of HSIL and possibly anal cancer.
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Affiliation(s)
- Takeshi Haga
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, University of Tokyo, Tokyo 113-8657, Japan; Department of Medicine, University of California, San Francisco, CA 94143, USA
| | - Jimmy T Efird
- Center for Health Disparities and College of Nursing, East Carolina University, Greenville, NC 27858, USA; School of Medicine and Public Health, University of Newcastle, Newcastle, NSW 2308, Australia
| | - Sharof Tugizov
- Department of Medicine, University of California, San Francisco, CA 94143, USA
| | - Joel M Palefsky
- Department of Medicine, University of California, San Francisco, CA 94143, USA
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Keshavarz M, Tan B, Venkatakrishnan K. Cell Selective Apoptosis Induced by Polymorphic Alteration of Self-Assembled Silica Nanowebs. ACS APPLIED MATERIALS & INTERFACES 2017; 9:6292-6305. [PMID: 28106378 DOI: 10.1021/acsami.6b14836] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The biocompatibility of silicon-based nanomaterials makes them suitable for biophysical and biomedical applications. However, the application of silicon-based nanomaterials has been mainly restricted to nanoparticles (NPs) as a potential drug carrier and the extracellular matrix (ECM) as a platform for cell adhesion and proliferation. Here, we introduce silica NPs self-assembled into a 3D nanoweb architecture that was shown to inherit the therapeutic and proliferative attributes of both NPs and ECMs. The self-assembled silica nanoweb (SNW) has, therefore, not only shown targeted druglike behavior in HeLa cells without the use of biomarkers but has also shown ECM characteristics. The ECM characteristics of SNWs enhanced the cellular attraction and proliferation by which fibroblasts exhibited tissuelike behavior, and HeLa cells underwent an intensified induction of apoptosis. These properties are tailored by the alteration of the polymorphic heterogeneities of the SNW as a novel nanobiointerface for exceptional apoptosis induction through the enhancement of cellular attraction, which, to the best of our knowledge, has not been previously reported. These attributes enable selective functionality with which cancerous HeLa and mammalian fibroblast cells were affected differently. Moreover, simultaneous control of the packing index and crystallinity of the SNWs, to which the cells had been attracted, possessed the additional advantage of modulating the selective functionality of this nanobiointerface. These polymorphic characteristics were tailored by the alteration of the crystallinity of the synthesized SNW via precision control of the ionization level of the silicon substrate, whose requisite ionization energy was generated by an ultrashort pulsed laser. Our results showed that the therapeutic functionality of the SNW-plated template can be elucidated via the endocytosis of amorphous SNWs. Because of the efficient cellular attraction and remarkable contrast in the cellular response to the SNW-plated template, we expect that these findings will provide new insights and opportunities for designing and engineering novel cell-material interfaces for advanced biomedical applications in cancer research.
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Affiliation(s)
- Meysam Keshavarz
- Micro/Nanofabrication Laboratory, Department of Aerospace Engineering, Ryerson University , 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), Partnership between Ryerson University and St. Michael's Hospital , Toronto, Ontario M5B 1W8, Canada
| | - Bo Tan
- Micro/Nanofabrication Laboratory, Department of Aerospace Engineering, Ryerson University , 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - Krishnan Venkatakrishnan
- Ultrashort Laser Nanomanufacturing Research Facility, Department of Mechanical and Industrial Engineering, Ryerson University , 350 Victoria Street, Toronto, ON M5B 2K3, Canada
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital , Toronto, Ontario M5B 1W8, Canada
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Altamura G, Corteggio A, Pacini L, Conte A, Pierantoni GM, Tommasino M, Accardi R, Borzacchiello G. Transforming properties of Felis catus papillomavirus type 2 E6 and E7 putative oncogenes in vitro and their transcriptional activity in feline squamous cell carcinoma in vivo. Virology 2016; 496:1-8. [PMID: 27236740 DOI: 10.1016/j.virol.2016.05.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 04/12/2016] [Accepted: 05/20/2016] [Indexed: 01/18/2023]
Abstract
Felis catus papillomavirus type 2 (FcaPV2) DNA is found in feline cutaneous squamous cell carcinomas (SCCs); however, its biological properties are still uncharacterized. In this study, we successfully expressed FcaPV2 E6 and E7 putative oncogenes in feline epithelial cells and demonstrated that FcaPV2 E6 binds to p53, impairing its protein level. In addition, E6 and E7 inhibited ultraviolet B (UVB)-triggered accumulation of p53, p21 and pro-apoptotic markers such as Cleaved Caspase3, Bax and Bak, suggesting a synergistic action of the virus with UV exposure in tumour pathogenesis. Furthermore, FcaPV2 E7 bound to feline pRb and impaired pRb levels, resulting in upregulation of the downstream pro-proliferative genes Cyclin A and Cdc2. Importantly, we demonstrated mRNA expression of FcaPV2 E2, E6 and E7 in feline SCC samples, strengthening the hypothesis of a causative role in the development of feline SCC.
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Affiliation(s)
- Gennaro Altamura
- Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples, Italy.
| | - Annunziata Corteggio
- Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples, Italy.
| | - Laura Pacini
- Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon, France.
| | - Andrea Conte
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Pansini 5, 80131 Naples, Italy.
| | - Giovanna Maria Pierantoni
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Pansini 5, 80131 Naples, Italy.
| | - Massimo Tommasino
- Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon, France.
| | - Rosita Accardi
- Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon, France.
| | - Giuseppe Borzacchiello
- Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples, Italy.
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Induction of apoptosis in HPV16 E7 transfected human keratinocyte by ALA-mediated photodynamic therapy. Photodiagnosis Photodyn Ther 2016. [DOI: 10.1016/j.pdpdt.2015.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jin L, Xu ZX. Recent advances in the study of HPV-associated carcinogenesis. Virol Sin 2015; 30:101-6. [PMID: 25910482 DOI: 10.1007/s12250-015-3586-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/16/2015] [Indexed: 10/23/2022] Open
Abstract
Human papillomaviruses (HPVs) cause virtually all cervical cancers, the second leading cause of death by cancer among women, as well as other anogenital cancers and a subset of head and neck cancers. Approximately half of women, who develop cervical cancer die from it. Despite the optimism that has accompanied the introduction of prophylactic vaccines to prevent some HPV infections, the relatively modest uptake of the vaccine, especially in the developing world, and the very high fraction of men and women who are already infected, means that HPV-associated disease will remain as a significant public health problem for decades. In this review, we summarize some recent findings on HPV-associated carcinogenesis, such as miRNAs in HPV-associated cancers, implication of stem cells in the biology and therapy of HPV-positive cancers, HPV vaccines, targeted therapy of cervical cancer, and drug treatment for HPV-induced intraepithelial neoplasias.
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Affiliation(s)
- Liyan Jin
- Division of Hematology and Oncology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, 35205, USA
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Habbous S, Pang V, Xu W, Amir E, Liu G. Human papillomavirus and host genetic polymorphisms in carcinogenesis: a systematic review and meta-analysis. J Clin Virol 2014; 61:220-9. [PMID: 25174543 DOI: 10.1016/j.jcv.2014.07.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/26/2014] [Accepted: 07/30/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND As the role of human papillomavirus (HPV) in carcinogenesis continues to rise, the role of genetic factors that modify this risk have become increasingly important. In this study, we reviewed the literature for associations between polymorphisms and HPV in carcinogenesis. OBJECTIVE To identify any associations of genetic polymorphisms with oncogenic HPV in carcinogenesis and to evaluate the methodology used. STUDY DESIGN Systematic literature review of HPV, genetic polymorphisms, and cancer risk. Odds ratios (OR), interaction terms, and p-values were tabulated. Meta-analyses and measures of heterogeneity were estimated using RevMan 5.1. RESULTS The cervix was the most frequently studied cancer site followed by the head and neck. Overall risk of cancer (cancer vs. control) was the most common comparison, whereas reports of initiation (pre-cancer vs. control) and progression (cancer vs. pre-cancer) were rare. Case-series and joint-effect of HPV and genotype on risk was evaluated frequently, but the independent effect of either risk factor alone was rarely provided. P53-Arg72Pro was the most commonly studied polymorphism studied. No consistent interaction was detected by meta-analysis in the HPV(+) [OR 0.98 (0.55-1.76)] or the HPV(-) [OR 1.10 (0.76-1.60)] subsets in head and neck cancer risk. Polymorphisms in genes known to encode proteins that physically interact with HPV were infrequently studied. CONCLUSION No consistent polymorphism-HPV interactions were observed. Study design, choice of candidate polymorphisms/genes, and a focus on overall risk rather than any specific portions of the carcinogenic pathway may have contributed to lack of significant findings.
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Affiliation(s)
- Steven Habbous
- Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9
| | - Vincent Pang
- Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9
| | - Wei Xu
- Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9; Department of Biostatistics, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9
| | - Eitan Amir
- Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9; Division of Medical Oncology and Hematology, Toronto, Ontario, Canada M5G 2M9
| | - Geoffrey Liu
- Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada M5G 2M9; Medicine and Epidemiology, Dalla Lana School of Public Health, University of Toronto, Canada M5G 2M9.
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Agomelatine and Duloxetine Synergistically Modulates Apoptotic Pathway by Inhibiting Oxidative Stress Triggered Intracellular Calcium Entry in Neuronal PC12 Cells: Role of TRPM2 and Voltage-Gated Calcium Channels. J Membr Biol 2014; 247:451-9. [DOI: 10.1007/s00232-014-9652-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 03/06/2014] [Indexed: 12/18/2022]
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RXRα deletion and E6E7 oncogene expression are sufficient to induce cervical malignant lesions in vivo. Cancer Lett 2012; 317:226-36. [DOI: 10.1016/j.canlet.2011.11.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 11/23/2011] [Accepted: 11/23/2011] [Indexed: 01/01/2023]
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To AKY, Chen GG, Chan UPF, Ye C, Yun JP, Ho RLK, Tessier A, Merchant JL, Lai PBS. ZBP-89 enhances Bak expression and causes apoptosis in hepatocellular carcinoma cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2010; 1813:222-30. [PMID: 20850481 DOI: 10.1016/j.bbamcr.2010.09.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 08/30/2010] [Accepted: 09/09/2010] [Indexed: 11/27/2022]
Abstract
ZBP-89 can enhance tumor cells to death stimuli. However, the molecular mechanism leading to the inhibitory effect of ZBP-89 is unknown. In this study, 4 liver cell lines were used to screen for the target of ZBP-89 on cell death pathway. The identified Bak was further analyzed for its role in ZBP-89-mediated apoptosis. The result showed that ZBP-89 significantly and time-dependently induced apoptosis. It significantly upregulated the level of pro-apoptotic Bak. ZBP-89 targeted a region between -457 and -407 of human Bak promoter to stimulate Bak expression based on the findings of Bak promoter luciferase report gene assay and electrophoretic mobility shift assay. ZBP-89-induced Bak increase and ZBP-89-mediated apoptosis were markedly suppressed by Bak siRNA, confirming that Bak was specifically targeted by ZBP-89 to facilitate apoptosis. In conclusion, this study demonstrated that ZBP-89 significantly induced apoptosis of HCC cells via promoting Bak level.
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Affiliation(s)
- Ann K Y To
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
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Current world literature. Curr Opin Otolaryngol Head Neck Surg 2009; 17:132-41. [PMID: 19363348 DOI: 10.1097/moo.0b013e32832ad5ad] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu HC, Chen GG, Vlantis AC, Tong MCF, Chan PKS, van Hasselt CA. Induction of cell cycle arrest and apoptosis by 5-fluorouracil in laryngeal cancer cells containing HPV16 E6 and E7 oncoproteins. Clin Biochem 2008; 41:1117-25. [PMID: 18619431 DOI: 10.1016/j.clinbiochem.2008.06.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Revised: 04/17/2008] [Accepted: 06/10/2008] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate the cytotoxic effect of 5-fluorouracil (5Fu) on HPV16-associated laryngeal cancer cells. DESIGN AND METHODS Cytotoxicity assay and TUNEL assay were used to assess the effect of 5Fu on laryngeal cancer cells transfected with HPV16 E6 or E7. RESULTS 5Fu induced apoptosis in the cells either with or without HPV16 in a dose- and time-dependent manner. 5Fu caused the accumulation of active pRb and p21(WAF1/CIP1), together with an increase in Bak and Bax expression and a decrease in Bcl-2 levels in all the transfected cells. G(1)/S phase cell cycle arrest was associated with the antiproliferation activity of 5Fu. 5Fu also presented some effects on the E6 and E7 oncoproteins. CONCLUSIONS HPV16 E6 and E7 oncoproteins do not prevent 5Fu-medicated apoptosis and G(1)/S cell arrest in laryngeal cancers. The sensitivity of 5Fu treatment is associated with the decrease of Bcl-2 and/or the increase in Bak and p21(WAFI/CIP1).
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Affiliation(s)
- Han Ching Liu
- Department of Surgery, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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