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Pociupany M, Snoeck R, Dierickx D, Andrei G. Treatment of Epstein-Barr Virus infection in immunocompromised patients. Biochem Pharmacol 2024; 225:116270. [PMID: 38734316 DOI: 10.1016/j.bcp.2024.116270] [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: 03/05/2024] [Revised: 05/06/2024] [Accepted: 05/06/2024] [Indexed: 05/13/2024]
Abstract
Epstein-Barr Virus (EBV), is a ubiquitous γ-Herpesvirus that infects over 95% of the human population and can establish a life-long infection without causing any clinical symptoms in healthy individuals by residing in memory B-cells. Primary infection occurs in childhood and is mostly asymptomatic, however in some young adults it can result in infectious mononucleosis (IM). In immunocompromised individuals however, EBV infection has been associated with many different malignancies. Since EBV can infect both epithelial and B-cells and very rarely NK cells and T-cells, it is associated with both epithelial cancers like nasopharyngeal carcinoma (NPC) and gastric carcinoma (GC), with lymphomas including Burkitt Lymphoma (BL) or Post-transplant Lymphoproliferative Disorder (PTLD) and rarely with NK/T-cell lymphomas. Currently there are no approved antivirals active in PTLD nor in any other malignancy. Moreover, lytic phase disease almost never requires antiviral treatment. Although many novel therapies against EBV have been described, the management and/or prevention of EBV primary infections or reactivations remains difficult. In this review, we discuss EBV infection, therapies targeting EBV in both lytic and latent state with novel therapeutics developed that show anti-EBV activity as well as EBV-associated malignancies both, epithelial and lymphoproliferative malignancies and emerging therapies targeting the EBV-infected cells.
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Affiliation(s)
- Martyna Pociupany
- Laboratory of Virology and Chemotherapy, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Robert Snoeck
- Laboratory of Virology and Chemotherapy, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Daan Dierickx
- Laboratory of Experimental Hematology, Department of Oncology, KU Leuven, Leuven, Belgium; Department of Hematology, University Hospitals Leuven, Leuven, Belgium
| | - Graciela Andrei
- Laboratory of Virology and Chemotherapy, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium.
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2
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Chen JLY, Pan CK, Lin LC, Tsai CY, Kuo CY, Huang YS, Lin YL. Therapeutic efficacy of cyclin-dependent kinase inhibition in combination with ionizing radiation for lung cancer. Int J Radiat Biol 2023; 99:1257-1266. [PMID: 36598432 DOI: 10.1080/09553002.2023.2161658] [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: 07/07/2022] [Revised: 11/24/2022] [Accepted: 12/13/2022] [Indexed: 01/05/2023]
Abstract
PURPOSE To evaluate the therapeutic efficacy of cyclin-dependent kinase (CDK) inhibition in combination with ionizing radiation for lung cancer. MATERIALS AND METHODS Human lung adenocarcinoma (A549) and squamous cell carcinoma (H520) cells were used to evaluate the therapeutic efficacy of CDK inhibition in combination with ionizing radiation in vitro using colony formation assay, γH2AX immunofluorescence staining, western blotting, and cell cycle phase analysis. We also performed in vivo evaluations of ectopic tumor growth. RESULTS In vitro pretreatment with the CDK inhibitor, seliciclib, before irradiation significantly decreased the survival of A549 and H520 cells in a dose-dependent manner. Although CDK inhibition alone did not increase the intensity of γH2AX foci, its combination with ionizing radiation increased DNA double-strand breaks, as shown by γH2AX immunofluorescence staining and western blotting. The combination of CDK inhibition and ionizing radiation-induced G2/M arrest and increased apoptosis, as evidenced by the increased proportion of cells in G2/M arrest, subG1 apoptotic population, and expression of apoptotic markers (cleaved PARP-1 and cleaved caspase-3). Mechanistic studies showed reduced expression of cyclin A with combined treatment, indicating cell cycle shifting effects. An in vivo xenograft model showed that the combination of CDK inhibition and ionizing radiation delayed xenograft tumor growth, and increased the proportion of cleaved PARP-1- and cleaved caspase-3-positive cells, compared to either treatment alone. CONCLUSIONS We provide preclinical tumoricidal evidence that the combination of CDK inhibition and ionizing radiation is an efficacious treatment for lung cancer.
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Affiliation(s)
- Jenny Ling-Yu Chen
- Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
- Department of Radiology, National Taiwan University College of Medicine, Taipei, Taiwan
- National Taiwan University Cancer Center, Taipei, Taiwan
| | - Chun-Kai Pan
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Cheng Lin
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Ching-Yi Tsai
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
- Institute of Toxicology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ching-Ying Kuo
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Sen Huang
- Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
- Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan
| | - Yu-Li Lin
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
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3
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Liu L, Liu S, Deng P, Liang Y, Xiao R, Tang LQ, Chen J, Chen QY, Guan P, Yan SM, Huang X, Hong JH, Chen J, Sun Y, Teh BT, Yu Q, Mai HQ, Tan J. Targeting the IRAK1-S100A9 Axis Overcomes Resistance to Paclitaxel in Nasopharyngeal Carcinoma. Cancer Res 2021; 81:1413-1425. [PMID: 33402387 DOI: 10.1158/0008-5472.can-20-2125] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/19/2020] [Accepted: 12/31/2020] [Indexed: 11/16/2022]
Abstract
Novel strategies to treat late-stage nasopharyngeal carcinoma that often develop resistance to chemotherapy remains an unmet clinical demand. In this study, we identify the multi-kinase inhibitor pacritinib as capable of resensitizing the response to paclitaxel in an acquired resistance model. Transcriptome analysis of paclitaxel-sensitive and -resistant cell lines, as well as chemorefractory clinical samples, identified S100A9 as the top candidate gene suppressed by pacritinib and whose overexpression was significantly associated with paclitaxel resistance and poor clinical outcome. Moreover, both paclitaxel-resistant nasopharyngeal carcinoma cells and relapsed/metastatic clinical samples exhibited increased IRAK1 phosphorylation and demonstrated that pacritinib could abolish the IRAK1 phosphorylation to suppress S100A9 expression. Functional studies in both in vitro and in vivo models showed that genetic or pharmacologic blockade of IRAK1 overcame the resistance to paclitaxel, and combined treatment of pacritinib with paclitaxel exhibited superior antitumor effect. Together, these findings demonstrate an important role for the IRAK1-S100A9 axis in mediating resistance to paclitaxel. Furthermore, targeting of IRAK1 by pacritinib may provide a novel therapeutic strategy to overcome chemoresistance in nasopharyngeal carcinoma. SIGNIFICANCE: Deregulation of the IRAK1-S100A9 axis correlates with poor prognosis, contributes to chemoresistance in nasopharyngeal carcinoma, and can be targeted by pacritinib to overcome chemoresistance in nasopharyngeal carcinoma.
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Affiliation(s)
- Lizhen Liu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Sailan Liu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Peng Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yujing Liang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Rong Xiao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Lin-Quan Tang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jinghong Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Qiu-Yan Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Peiyong Guan
- Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore
| | - Shu-Mei Yan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xiangliang Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jing Han Hong
- Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore
| | - Jianfeng Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yichen Sun
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Bin Tean Teh
- Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore
- SingleHealth/Duke-NUS Institute of Precision Medicine, National Heart Center Singapore, Singapore
- Laboratory of Cancer Epigenome, Division of Medical Sciences, National Cancer Centre Singapore, Singapore
- Institute of Molecular and Cell Biology, Singapore
| | - Qiang Yu
- Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore
- Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Hai-Qiang Mai
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Jing Tan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.
- Laboratory of Cancer Epigenome, Division of Medical Sciences, National Cancer Centre Singapore, Singapore
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
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Pivonello R, Ferrigno R, De Martino MC, Simeoli C, Di Paola N, Pivonello C, Barba L, Negri M, De Angelis C, Colao A. Medical Treatment of Cushing's Disease: An Overview of the Current and Recent Clinical Trials. Front Endocrinol (Lausanne) 2020; 11:648. [PMID: 33363514 PMCID: PMC7753248 DOI: 10.3389/fendo.2020.00648] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 08/07/2020] [Indexed: 12/20/2022] Open
Abstract
Cushing's disease (CD) is a serious endocrine disorder characterized by chronic hypercortisolism, or Cushing's syndrome (CS), caused by a corticotroph pituitary tumor, which induces an excessive adrenocorticotropic hormone (ACTH) and consequently cortisol secretion. CD presents a severe clinical burden, with impairment of the quality of life and increase in mortality. Pituitary surgery represents the first-line therapy, but it is non-curative in one third of patients, requiring additional treatments. Among second-line treatments, medical therapy is gradually gaining importance, although the current medical treatments are unable to reach optimal efficacy and safety profile. Therefore, new drugs and new formulations of presently available drugs are currently under clinical investigation in international clinical trials, in order to assess their efficacy and safety in CD, or in the general population of CS. Among pituitary-directed agents, pasireotide, in the twice-daily subcutaneous formulation, has been demonstrated to be an effective treatment both in clinical trials and in real-world studies, and extension studies of the phase II and III clinical trials reported evidence of long-term efficacy with general good safety profile, although associated with frequent hyperglycemia, which requires monitoring of glucose metabolism. Moreover, the most recent once-monthly intramuscular formulation, pasireotide long-acting release (LAR), showed similar efficacy and safety, but associated with potential better compliance profile in CD. Roscovitine is an experimental drug currently under investigation. Among adrenal-directed agents, metyrapone is the only historical agent currently under investigation in a prospective, multicenter, international clinical trial, that would likely clarify its efficacy and safety in a large population of patients with CS. Osilodrostat, a novel agent with a mechanism of action similar to metyrapone, seems to offer a rapid, sustained, and effective disease control of CD, according to recently completed clinical trials, whereas levoketoconazole, a different chemical formulation of the historical agent ketoconazole, is still under investigation in clinical trials, with preliminary evidences showing an effective and safe control of CS. ATR-101 is an experimental drug currently under investigation. Among glucocorticoid receptor-directed drugs, mifepristone has been demonstrated to improve clinical syndrome and comorbidities, especially hypertension and impairment of glucose metabolism, but the occurrence of hypokalemia and in women uterine disorders, due to the concomitant action on progestin receptor, requires caution, whereas the preliminary evidence on relacorilant, characterized by high selectivity for glucocorticoid receptor, suggested good efficacy in the control of hypertension and impairment of glucose metabolism, as well as a good safety profile, in CS. Finally, a limited experience has demonstrated that combination therapy might be an interesting approach in the management of CD. The current review provides a summary of the available evidences from current and recent clinical trials on CD, with a specific focus on preliminary data.
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Affiliation(s)
- Rosario Pivonello
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
- UNESCO Chair for Health Education and Sustainable Development, Federico II University, Naples, Italy
| | - Rosario Ferrigno
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Maria Cristina De Martino
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Chiara Simeoli
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Nicola Di Paola
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Claudia Pivonello
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Livia Barba
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Mariarosaria Negri
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Cristina De Angelis
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Annamaria Colao
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
- UNESCO Chair for Health Education and Sustainable Development, Federico II University, Naples, Italy
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5
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Wong CH, Ma BBY, Hui CWC, Lo KW, Hui EP, Chan ATC. Preclinical evaluation of ribociclib and its synergistic effect in combination with alpelisib in non-keratinizing nasopharyngeal carcinoma. Sci Rep 2018; 8:8010. [PMID: 29789630 PMCID: PMC5964240 DOI: 10.1038/s41598-018-26201-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/08/2018] [Indexed: 01/08/2023] Open
Abstract
Ribociclib is a specific cyclin dependent kinase (Cdk) 4/6 inhibitor that induces G1 arrest by blocking the formation of cyclin D1-Cdk4/6 complex and inhibiting retinoblastoma (RB) phosphorylation. Cyclin D1 is overexpressed in over 90% of nasopharyngeal carcinoma (NPC) and CCND1 gene activation plays a critical role in NPC pathogenesis. This study evaluated the preclinical activities of ribociclib in NPC cell lines and patient derived xenograft (PDX) models. Over 95% cell growth inhibition was observed at 96 hours after ribociclib treatment. (IC50 concentrations: HK1 = 1.42 ± 0.23 µM; HK1-LMP1 = 2.18 ± 0.70 µM and C666-1 = 8.26 ± 0.92 µM). HK1 and C666-1 cells were chosen for analysis of ribociclib on kinase signaling, apoptosis and cell cycle. Treatment with ribociclib for 48 hours consistently showed a dose-dependent reduction in phosphorylated and total RB expression and G1 cycle arrest was only observed. Combining ribociclib with the alpha-specific PI3K inhibitor alpelisib showed a synergistic effect in two NPC PDX models in nude mice. The co-treatment induced a significant reduction in tumor volume in both xeno-666 and xeno-2117 compared with ribociclib treatment alone and control (p < 0.01). In summary, ribociclib is active in NPC models and the effect on growth inhibition was augmented when combined with alpelisib. This study supports the clinical evaluation of ribociclib in NPC.
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Affiliation(s)
- Chi-Hang Wong
- Cancer Drug Testing Unit (CDTU), Hong Kong Cancer Institute and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China. .,Department of Clinical Oncology, State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China.
| | - Brigette B Y Ma
- Cancer Drug Testing Unit (CDTU), Hong Kong Cancer Institute and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China.,Department of Clinical Oncology, State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Connie W C Hui
- Cancer Drug Testing Unit (CDTU), Hong Kong Cancer Institute and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China.,Department of Clinical Oncology, State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Kwok-Wai Lo
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Edwin P Hui
- Department of Clinical Oncology, State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Anthony T C Chan
- Cancer Drug Testing Unit (CDTU), Hong Kong Cancer Institute and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China.,Department of Clinical Oncology, State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
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6
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Ziemann F, Seltzsam S, Dreffke K, Preising S, Arenz A, Subtil FSB, Rieckmann T, Engenhart-Cabillic R, Dikomey E, Wittig A. Roscovitine strongly enhances the effect of olaparib on radiosensitivity for HPV neg. but not for HPV pos. HNSCC cell lines. Oncotarget 2017; 8:105170-105183. [PMID: 29285242 PMCID: PMC5739629 DOI: 10.18632/oncotarget.22005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Accepted: 10/04/2017] [Indexed: 02/06/2023] Open
Abstract
At present, advanced stage human Papillomavirus (HPV) negative and positive head and neck squamous cell carcinoma (HNSCC) are treated by intense multimodal therapy that includes radiochemotherapy, which are associated with relevant side effects. Patients with HPV positive tumors possess a far better prognosis than those with HPV negative cancers. Therefore, new therapeutic strategies are needed to improve the outcome especially of the latter one as well as quality of life for all HNSCC patients. Here we tested whether roscovitine, an inhibitor of cyclin-dependent kinases (CDKs), which hereby also blocks homologous recombination (HR), can be used to enhance the radiation sensitivity of HNSCC cell lines. In all five HPV negative and HPV positive cell lines tested, roscovitine caused inhibition of CDK1 and 2. Surprisingly, all HPV positive cell lines were found to be defective in HR. In contrast, HPV negative strains demonstrated efficient HR, which was completely suppressed by roscovitine. In line with this, for HPV negative but not for HPV positive cell lines, treatment with roscovitine resulted in a pronounced enhancement of the radiation-induced G2 arrest as well as a significant increase in radiosensitivity. Due to a defect in HR, all HPV positive cell lines were efficiently radiosensitized by the PARP-1 inhibitor olaparib. In contrast, in HPV negative cell lines a significant radiosensitization by olaparib was only achieved when combined with roscovitine.
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Affiliation(s)
- Frank Ziemann
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Steve Seltzsam
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Kristin Dreffke
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Stefanie Preising
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Andrea Arenz
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Florentine S B Subtil
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Thorsten Rieckmann
- Laboratory for Radiobiology & Experimental Radiooncology, University Medical Center Hamburg Eppendorf, Hamburg, Germany.,Department of Otolaryngology and Head and Neck Surgery, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Rita Engenhart-Cabillic
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
| | - Ekkehard Dikomey
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany.,Laboratory for Radiobiology & Experimental Radiooncology, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Andrea Wittig
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, University Hospital GieΔen and Marburg, Marburg, Germany
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Prognostic microRNAs modulate the RHO adhesion pathway: A potential therapeutic target in undifferentiated pleomorphic sarcomas. Oncotarget 2016; 6:39127-39. [PMID: 25970788 PMCID: PMC4770761 DOI: 10.18632/oncotarget.3926] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 04/08/2015] [Indexed: 12/31/2022] Open
Abstract
A common and aggressive subtype of soft-tissue sarcoma, undifferentiated pleomorphic sarcoma (UPS) was examined to determine the role of micro-RNAs (miRNAs) in modulating distant metastasis. Following histopathologic review, 110 fresh frozen clinically annotated UPS samples were divided into two independent cohorts for Training (42 patients), and Validation (68 patients) analyses. Global miRNA profiling on the Training Set and functional analysis in vitro suggested that miRNA-138 and its downstream RHO-ROCK cell adhesion pathway was a convergent target of miRNAs associated with the development of metastasis. A six-miRNA signature set prognostic of distant metastasis-free survival (DMFS) was developed from Training Set miRNA expression values. Using the six-miRNA signature, patients were successfully categorized into high- and low-risk groups for DMFS in an independent Validation Set, with a hazard ratio (HR) of 2.25 (p = 0.048). After adjusting for other known prognostic variables such as age, gender, tumor grade, size, depth, and treatment with radiotherapy, the six-miRNA signature retained prognostic value with a HR of 3.46 (p < 0.001). A prognostic miRNA biomarker for clinical validation was thus identified along with a functional pathway that modulates UPS metastatic phenotype.
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8
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Law V, Dong S, Rosales JL, Jeong MY, Zochodne D, Lee KY. Enhancement of Peripheral Nerve Regrowth by the Purine Nucleoside Analog and Cell Cycle Inhibitor, Roscovitine. Front Cell Neurosci 2016; 10:238. [PMID: 27799897 PMCID: PMC5066473 DOI: 10.3389/fncel.2016.00238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/30/2016] [Indexed: 02/03/2023] Open
Abstract
Peripheral nerve regeneration is a slow process that can be associated with limited outcomes and thus a search for novel and effective therapy for peripheral nerve injury and disease is crucial. Here, we found that roscovitine, a synthetic purine nucleoside analog, enhances neurite outgrowth in neuronal-like PC12 cells. Furthermore, ex vivo analysis of pre-injured adult rat dorsal root ganglion (DRG) neurons showed that roscovitine enhances neurite regrowth in these cells. Likewise, in vivo transected sciatic nerves in rats locally perfused with roscovitine had augmented repopulation of new myelinated axons beyond the transection zone. By mass spectrometry, we found that roscovitine interacts with tubulin and actin. It interacts directly with tubulin and causes a dose-dependent induction of tubulin polymerization as well as enhances Guanosine-5′-triphosphate (GTP)-dependent tubulin polymerization. Conversely, roscovitine interacts indirectly with actin and counteracts the inhibitory effect of cyclin-dependent kinases 5 (Cdk5) on Actin-Related Proteins 2/3 (Arp2/3)-dependent actin polymerization, and thus, causes actin polymerization. Moreover, in the presence of neurotrophic factors such as nerve growth factor (NGF), roscovitine-enhanced neurite outgrowth is mediated by increased activation of the extracellular signal-regulated kinases 1/2 (ERK1/2) and p38 mitogen-activated protein kinase (MAPK) pathways. Since microtubule and F-actin dynamics are critical for axonal regrowth, the ability of roscovitine to activate the ERK1/2 and p38 MAPK pathways and support polymerization of tubulin and actin indicate a major role for this purine nucleoside analog in the promotion of axonal regeneration. Together, our findings demonstrate a therapeutic potential for the purine nucleoside analog, roscovitine, in peripheral nerve injury.
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Affiliation(s)
- Vincent Law
- Department of Cell Biology and Anatomy, Arnie Charbonneau Cancer Institute, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
| | - Sophie Dong
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
| | - Jesusa L Rosales
- Department of Biochemistry and Molecular Biology, Snyder Institute for Chronic Diseases, University of Calgary Calgary, AB, Canada
| | - Myung-Yung Jeong
- Department of Cogno-Mechatronics Engineering, Pusan National University Pusan, South Korea
| | - Douglas Zochodne
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
| | - Ki-Young Lee
- Department of Cell Biology and Anatomy, Arnie Charbonneau Cancer Institute, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
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9
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Khalil HS, Mitev V, Vlaykova T, Cavicchi L, Zhelev N. Discovery and development of Seliciclib. How systems biology approaches can lead to better drug performance. J Biotechnol 2015; 202:40-9. [PMID: 25747275 DOI: 10.1016/j.jbiotec.2015.02.032] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 02/26/2015] [Accepted: 02/27/2015] [Indexed: 11/30/2022]
Abstract
Seliciclib (R-Roscovitine) was identified as an inhibitor of CDKs and has undergone drug development and clinical testing as an anticancer agent. In this review, the authors describe the discovery of Seliciclib and give a brief summary of the biology of the CDKs Seliciclib inhibits. An overview of the published in vitro and in vivo work supporting the development as an anti-cancer agent, from in vitro experiments to animal model studies ending with a summary of the clinical trial results and trials underway is presented. In addition some potential non-oncology applications are explored and the potential mode of action of Seliciclib in these areas is described. Finally the authors argue that optimisation of the therapeutic effects of kinase inhibitors such as Seliciclib could be enhanced using a systems biology approach involving mathematical modelling of the molecular pathways regulating cell growth and division.
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Affiliation(s)
- Hilal S Khalil
- CMCBR, SIMBIOS, School of Science, Engineering and Technology, Abertay University, Dundee DD1 1HG, Scotland, UK
| | - Vanio Mitev
- Department of Chemistry and Biochemistry, Medical University of Sofia, 1431 Sofia, Bulgaria
| | - Tatyana Vlaykova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Laura Cavicchi
- CMCBR, SIMBIOS, School of Science, Engineering and Technology, Abertay University, Dundee DD1 1HG, Scotland, UK
| | - Nikolai Zhelev
- CMCBR, SIMBIOS, School of Science, Engineering and Technology, Abertay University, Dundee DD1 1HG, Scotland, UK.
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Williams JP, Kim I, Ito E, Shi W, Yue S, Siu LL, Waldron J, O'Sullivan B, Yip KW, Liu FF. Pre-clinical characterization of Dacomitinib (PF-00299804), an irreversible pan-ErbB inhibitor, combined with ionizing radiation for head and neck squamous cell carcinoma. PLoS One 2014; 9:e98557. [PMID: 24853121 PMCID: PMC4031184 DOI: 10.1371/journal.pone.0098557] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 05/05/2014] [Indexed: 11/30/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) is over-expressed in nearly all cases of squamous cell carcinoma of the head and neck (SCCHN), and is an important driver of disease progression. EGFR targeted therapies have demonstrated clinical benefit for SCCHN treatment. In this report, we investigated the pre-clinical efficacy of Dacomitinib (PF-00299804), an irreversible pan-ErbB inhibitor, both alone and in combination with ionizing radiation (IR), a primary curative modality for SCCHN. One normal oral epithelial (NOE) and three SCCHN (FaDu, UT-SCC-8, UT-SCC-42a) cell lines were used to conduct cell viability, clonogenic survival, cell cycle, and immunoblotting assays in vitro, using increasing doses of Dacomitinib (10–500 nM), both with and without IR (2–4 Gy). The FaDu xenograft model was utilized for tumor growth delay assays in vivo, and immunohistochemical analyses were conducted on extracted tumors. A dose-dependent reduction in cell viability and clonogenic survival after Dacomitinib treatment was observed in all three SCCHN models. Treatment led to a significant reduction in EGFR signalling, with a subsequent decrease in phosphorylation of downstream targets such as ERK, AKT, and mTOR. In vivo, Dacomitinib treatment delayed tumor growth, while decreasing phospho-EGFR and Ki-67 immunoexpression. These effects were further enhanced when combined with IR, both in vitro and in vivo. The preclinical data support the further evaluations of Dacomitinib combined with IR for the future management of patients with SCCHN.
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Affiliation(s)
- Justin P. Williams
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Inki Kim
- Asan Institute for Life Science, Asan Medical Center, Seoul, Republic of Korea
| | - Emma Ito
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Wei Shi
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Shijun Yue
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Lillian L. Siu
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Division of Medical Oncology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Ontario, Canada
| | - John Waldron
- Department of Radiation Oncology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Ontario, Canada
| | - Brian O'Sullivan
- Department of Radiation Oncology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Ontario, Canada
| | - Kenneth W. Yip
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Fei-Fei Liu
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Department of Radiation Oncology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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CDK/CK1 inhibitors roscovitine and CR8 downregulate amplified MYCN in neuroblastoma cells. Oncogene 2013; 33:5675-87. [PMID: 24317512 DOI: 10.1038/onc.2013.513] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 10/09/2013] [Accepted: 10/21/2013] [Indexed: 12/15/2022]
Abstract
To understand the mechanisms of action of (R)-roscovitine and (S)-CR8, two related pharmacological inhibitors of cyclin-dependent kinases (CDKs), we applied a variety of '-omics' techniques to the human neuroblastoma SH-SY5Y and IMR32 cell lines: (1) kinase interaction assays, (2) affinity competition on immobilized broad-spectrum kinase inhibitors, (3) affinity chromatography on immobilized (R)-roscovitine and (S)-CR8, (4) whole genome transcriptomics analysis and specific quantitative PCR studies, (5) global quantitative proteomics approach and western blot analysis of selected proteins. Altogether, the results show that the major direct targets of these two molecules belong to the CDKs (1,2,5,7,9,12), DYRKs, CLKs and CK1s families. By inhibiting CDK7, CDK9 and CDK12, these inhibitors transiently reduce RNA polymerase 2 activity, which results in downregulation of a large set of genes. Global transcriptomics and proteomics analysis converge to a central role of MYC transcription factors downregulation. Indeed, CDK inhibitors trigger rapid and massive downregulation of MYCN expression in MYCN-amplified neuroblastoma cells as well as in nude mice xenografted IMR32 cells. Inhibition of casein kinase 1 may also contribute to the antitumoral activity of (R)-roscovitine and (S)-CR8. This dual mechanism of action may be crucial in the use of these kinase inhibitors for the treatment of MYC-dependent cancers, in particular neuroblastoma where MYCN amplification is a strong predictor factor for high-risk disease.
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Bruyère C, Meijer L. Targeting cyclin-dependent kinases in anti-neoplastic therapy. Curr Opin Cell Biol 2013; 25:772-9. [PMID: 24011867 DOI: 10.1016/j.ceb.2013.08.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 08/15/2013] [Accepted: 08/15/2013] [Indexed: 12/12/2022]
Abstract
Cell cycle progression is controlled by sequential activation of cyclin-dependent kinases (CDKs), which are often deregulated in cancer. Consequently numerous pharmacological inhibitors of CDKs have been developed with the aim of treating cancers. The article briefly reviews CDK inhibitors and their use to treat cancers, with specific focus on the use of biomarkers and drugs combination to improve their therapeutic efficacy.
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Affiliation(s)
- Céline Bruyère
- ManRos Therapeutics, Centre de Perharidy, 29680 Roscoff, France
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Lenarduzzi M, Hui ABY, Yue S, Ito E, Shi W, Williams J, Bruce J, Sakemura-Nakatsugawa N, Xu W, Schimmer A, Liu FF. Hemochromatosis enhances tumor progression via upregulation of intracellular iron in head and neck cancer. PLoS One 2013; 8:e74075. [PMID: 23991213 PMCID: PMC3753261 DOI: 10.1371/journal.pone.0074075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 07/22/2013] [Indexed: 12/13/2022] Open
Abstract
Introduction Despite improvements in treatment strategies for head and neck squamous cell carcinoma (HNSCC), outcomes have not significantly improved; highlighting the importance of identifying novel therapeutic approaches to target this disease. To address this challenge, we proceeded to evaluate the role of iron in HNSCC. Experimental Design Expression levels of iron-related genes were evaluated in HNSCC cell lines using quantitative RT-PCR. Cellular phenotypic effects were assessed using viability (MTS), clonogenic survival, BrdU, and tumor formation assays. The prognostic significance of iron-related proteins was determined using immunohistochemistry. Results In a panel of HNSCC cell lines, hemochromatosis (HFE) was one of the most overexpressed genes involved in iron regulation. In vitro knockdown of HFE in HNSCC cell lines significantly decreased hepcidin (HAMP) expression and intracellular iron level. This in turn, resulted in a significant decrease in HNSCC cell viability, clonogenicity, DNA synthesis, and Wnt signalling. These cellular changes were reversed by re-introducing iron back into HNSCC cells after HFE knockdown, indicating that iron was mediating this phenotype. Concordantly, treating HNSCC cells with an iron chelator, ciclopirox olamine (CPX), significantly reduced viability and clonogenic survival. Finally, patients with high HFE expression experienced a reduced survival compared to patients with low HFE expression. Conclusions Our data identify HFE as potentially novel prognostic marker in HNSCC that promotes tumour progression via HAMP and elevated intracellular iron levels, leading to increased cellular proliferation and tumour formation. Hence, these findings suggest that iron chelators might have a therapeutic role in HNSCC management.
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Affiliation(s)
- Michelle Lenarduzzi
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Angela B. Y. Hui
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Shijun Yue
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Emma Ito
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Wei Shi
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Justin Williams
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
| | - Jeff Bruce
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | | | - Wei Xu
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Aaron Schimmer
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Fei-Fei Liu
- Ontario Cancer Institute, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Radiation Medicine Program, University Health Network, Toronto, Ontario, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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Lenarduzzi M, Hui ABY, Alajez NM, Shi W, Williams J, Yue S, O’Sullivan B, Liu FF. MicroRNA-193b enhances tumor progression via down regulation of neurofibromin 1. PLoS One 2013; 8:e53765. [PMID: 23335975 PMCID: PMC3546079 DOI: 10.1371/journal.pone.0053765] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 12/05/2012] [Indexed: 01/01/2023] Open
Abstract
Despite improvements in therapeutic approaches for head and neck squamous cell carcinomas (HNSCC), clinical outcome has remained disappointing, with 5-year overall survival rates hovering around 40-50%, underscoring an urgent need to better understand the biological bases of this disease. We chose to address this challenge by studying the role of micro-RNAs (miRNAs) in HNSCC. MiR-193b was identified as an over-expressed miRNA from global miRNA profiling studies previously conducted in our lab, and confirmed in HNSCC cell lines. In vitro knockdown of miR-193b in FaDu cancer cells substantially reduced cell proliferation, migration and invasion, along with suppressed tumour formation in vivo. By integrating in silico prediction algorithms with in vitro experimental mRNA profilings, plus mRNA expression data of clinical specimens, neurofibromin 1 (NF1) was identified to be a target of miR-193b. Concordantly, miR-193b knockdown decreased NF1 transcript and protein levels significantly. Luciferase reporter assays confirmed the direct interaction of miR-193b with NF1. Moreover, p-ERK, a downstream target of NF1 was also suppressed after miR-193b knockdown. FaDu cells treated with a p-ERK inhibitor (U0126) phenocopied the reduced cell proliferation, migration and invasion observed with miR-193b knockdown. Finally, HNSCC patients whose tumours expressed high levels of miR-193b experienced a lower disease-free survival compared to patients with low miR-193b expression. Our findings identified miR-193b as a potentially novel prognostic marker in HNSCC that drives tumour progression via down-regulating NF1, in turn leading to activation of ERK, resulting in proliferation, migration, invasion, and tumour formation.
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Affiliation(s)
- Michelle Lenarduzzi
- Ontario Cancer Institute, University Health Network, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Angela B. Y. Hui
- Ontario Cancer Institute, University Health Network, Toronto, Canada
| | - Nehad M. Alajez
- Stem Cell Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Wei Shi
- Ontario Cancer Institute, University Health Network, Toronto, Canada
| | - Justin Williams
- Ontario Cancer Institute, University Health Network, Toronto, Canada
| | - Shijun Yue
- Ontario Cancer Institute, University Health Network, Toronto, Canada
| | - Brian O’Sullivan
- Radiation Medicine Program University Health Network, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Ontario
| | - Fei-Fei Liu
- Ontario Cancer Institute, University Health Network, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Radiation Medicine Program University Health Network, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Ontario
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Therapeutic Induction of Apoptosis in Nasopharyngeal Carcinoma. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013. [DOI: 10.1007/978-1-4614-5947-7_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zhong J, Min L, Huang H, Li L, Li D, Li J, Ma Z, Dai L. EZH2 regulates the expression of p16 in the nasopharyngeal cancer cells. Technol Cancer Res Treat 2012; 12:269-74. [PMID: 23289480 DOI: 10.7785/tcrt.2012.500315] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The increasing evidence supported the role of Enhancer of Zeste Homolog 2 (EZH2) in the cancer development and progression. However, its precise role in the tumorigenesis of Nasopharyngeal Carcinoma (NPC) remains to be elucidated. EZH2 was depleted by retroviral infection in the NPC cells (HK-1, CNE-2, CNE-1 and C666-1). The degree of EZH2 knockdown was then assessed by real-time quantitative PCR and Western Blot analysis. Cell proliferation was assessed using the soluble tetrazolium salt (MTS) cell proliferation assay, and cell cycle was measured by FACS test. The methylation status of p16(INK4a) was determined by bisulphate treatment of the DNA, followed by MSP. EZH2 was over-expressed in NPC cells, and the expression in undifferentiated-derived NPC cells (CNE-1, C666-1) was more significant than differentiated-derived NPC cells (HK-1, CNE-2). EZH2 was successfully depleted after retroviral infection in C666-1 cells, and the EZH2 depletion could inhibit the proliferation and arrested G1/S phase of NPC cells. In addition, both mRNA and protein levels of p16(INK4a) increased significantly in presence of EZH2 depletion. The further Methylation-Specific Polymerase Chain Reaction (MSP) assay suggested that over-expressed EZH2 may contribute to the reduction of p16(INK4a) expression by hyper methylating its promoter. EZH2 is overexpressed in NPC and reduces expression of p16(INK4a) by influencing methylation, opening therapeutic options.
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Affiliation(s)
- Jing Zhong
- No. 198, Hongqi Road, Huzhou Key Laboratory of Molecular Medicine, Huzhou Central Hospital, Huzhou, Zhejiang Province 313000, China
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Martin KL, Hill GA, Klein RR, Arnett DG, Burd R, Limesand KH. Prevention of radiation-induced salivary gland dysfunction utilizing a CDK inhibitor in a mouse model. PLoS One 2012; 7:e51363. [PMID: 23236487 PMCID: PMC3517508 DOI: 10.1371/journal.pone.0051363] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 11/05/2012] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Treatment of head and neck cancer with radiation often results in damage to surrounding normal tissues such as salivary glands. Permanent loss of function in the salivary glands often leads patients to discontinue treatment due to incapacitating side effects. It has previously been shown that IGF-1 suppresses radiation-induced apoptosis and enhances G2/M arrest leading to preservation of salivary gland function. In an effort to recapitulate the effects of IGF-1, as well as increase the likelihood of translating these findings to the clinic, the small molecule therapeutic Roscovitine, is being tested. Roscovitine is a cyclin-dependent kinase inhibitor that acts to transiently inhibit cell cycle progression and allow for DNA repair in damaged tissues. METHODOLOGY/PRINCIPAL FINDINGS Treatment with Roscovitine prior to irradiation induced a significant increase in the percentage of cells in the G(2)/M phase, as demonstrated by flow cytometry. In contrast, mice treated with radiation exhibit no differences in the percentage of cells in G(2)/M when compared to unirradiated controls. Similar to previous studies utilizing IGF-1, pretreatment with Roscovitine leads to a significant up-regulation of p21 expression and a significant decrease in the number of PCNA positive cells. Radiation treatment leads to a significant increase in activated caspase-3 positive salivary acinar cells, which is suppressed by pretreatment with Roscovitine. Administration of Roscovitine prior to targeted head and neck irradiation preserves normal tissue function in mouse parotid salivary glands, both acutely and chronically, as measured by salivary output. CONCLUSIONS/SIGNIFICANCE These studies suggest that induction of transient G(2)/M cell cycle arrest by Roscovitine allows for suppression of apoptosis, thus preserving normal salivary function following targeted head and neck irradiation. This could have an important clinical impact by preventing the negative side effects of radiation therapy in surrounding normal tissues.
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Affiliation(s)
- Katie L. Martin
- Physiological Sciences Graduate Interdisciplinary Program, University of Arizona, Tucson, Arizona, United States of America
| | - Grace A. Hill
- Department of Nutritional Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Rob R. Klein
- Department of Pathology, University of Arizona, Tucson, Arizona, United States of America
| | - Deborah G. Arnett
- Department of Nutritional Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Randy Burd
- Department of Nutritional Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Kirsten H. Limesand
- Physiological Sciences Graduate Interdisciplinary Program, University of Arizona, Tucson, Arizona, United States of America
- Department of Nutritional Sciences, University of Arizona, Tucson, Arizona, United States of America
- * E-mail:
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Smith PA, Merritt D, Barr L, Thorley-Lawson DA. An orthotopic model of metastatic nasopharyngeal carcinoma and its application in elucidating a therapeutic target that inhibits metastasis. Genes Cancer 2012; 2:1023-33. [PMID: 22737268 DOI: 10.1177/1947601912440878] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 02/10/2012] [Indexed: 11/16/2022] Open
Abstract
To define and therapeutically target mechanisms that mediate nasopharyngeal carcinoma (NPC) metastasis, we have developed a unique orthotopic xenograft mouse model that accurately recapitulates the invasive and metastatic behavior of human disease. Based on clinical and laboratory evidence that the PI3K/Akt/mTOR axis is involved in aggressive NPC tumor behavior, we chose it as a therapeutic target to test the utility of our orthotopic system for evaluating the effectiveness of a targeted treatment for metastatic NPC. Demonstrated herein, we have shown that both the development and growth of metastatic lesions are markedly reduced by the mTOR inhibitor sirolimus. Thus, this orthotopic model provides a platform to study potential therapeutics for advanced NPC and demonstrates that targeting the PI3K/Akt/mTOR pathway is a promising intervention against disseminated disease.
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Affiliation(s)
- Pamela A Smith
- Department of Hematology/Oncology, Tufts Medical Center, Boston, MA, USA
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Dual blockade of lipid and cyclin-dependent kinases induces synthetic lethality in malignant glioma. Proc Natl Acad Sci U S A 2012; 109:12722-7. [PMID: 22802621 DOI: 10.1073/pnas.1202492109] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Malignant glioma, the most common primary brain tumor, is generally incurable. Although phosphatidylinositol-3-kinase (PI3K) signaling features prominently in glioma, inhibitors generally block proliferation rather than induce apoptosis. Starting with an inhibitor of both lipid and protein kinases that induced prominent apoptosis and that failed early clinical development because of its broad target profile and overall toxicity, we identified protein kinase targets, the blockade of which showed selective synthetic lethality when combined with PI3K inhibitors. Prioritizing protein kinase targets for which there are clinical inhibitors, we demonstrate that cyclin-dependent kinase (CDK)1/2 inhibitors, siRNAs against CDK1/2, and the clinical CDK1/2 inhibitor roscovitine all cooperated with the PI3K inhibitor PIK-90, blocking the antiapoptotic protein Survivin and driving cell death. In addition, overexpression of CDKs partially blocked some of the apoptosis caused by PIK-75. Roscovitine and PIK-90, in combination, were well tolerated in vivo and acted in a synthetic-lethal manner to induce apoptosis in human glioblastoma xenografts. We also tested clinical Akt and CDK inhibitors, demonstrating induction of apoptosis in vitro and providing a preclinical rationale to test this combination therapy in patients.
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20
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Hui ABY, Bruce JP, Alajez NM, Shi W, Yue S, Perez-Ordonez B, Xu W, O'Sullivan B, Waldron J, Cummings B, Gullane P, Siu L, Liu FF. Significance of dysregulated metadherin and microRNA-375 in head and neck cancer. Clin Cancer Res 2011; 17:7539-50. [PMID: 22031094 DOI: 10.1158/1078-0432.ccr-11-2102] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Despite recent improvements in local control of head and neck cancers (HNC), distant metastasis remains a major cause of death. Hence, further understanding of HNC biology, and in particular, the genes/pathways driving metastasis is essential to improve outcome. EXPERIMENTAL DESIGN Quantitative reverse transcriptase PCR (qRT-PCR) was used to measure the expression of miR-375 and metadherin (MTDH) in HNC patient samples. Targets of miR-375 were confirmed using qRT-PCR, Western blot analysis, and luciferase assays. Phenotypic effects of miR-375 reexpression and MTDH knockdown were assessed using viability (MTS), clonogenic survival, cell migration/invasion, as well as in vivo tumor formation assays. The prognostic significance of miR-375 or MTDH in nasopharyngeal carcinoma (NPC) was determined by comparing low versus high expression groups. RESULTS MiR-375 expression was significantly reduced (P = 0.01), and conversely, MTDH was significantly increased (P = 0.0001) in NPC samples. qRT-PCR, Western blots, and luciferase assays corroborated MTDH as a target of miR-375. Reexpression of miR-375 and siRNA knockdown of MTDH both decreased cell viability and clonogenic survival, cell migration/invasion, as well as in vivo tumor formation. NPC patients whose tumors expressed high levels of MTDH experienced significantly lower survival and, in particular, higher distant relapse rates (5-year distant relapse rates: 26% vs. 5%; P = 0.005). CONCLUSIONS Dysregulation of miR-375 and MTDH may represent an important oncogenic pathway driving human HNC progression, particularly distant metastases, which is now emerging as a major cause of death for HNC patients. Hence, targeting this pathway could potentially be a novel therapeutic strategy by which HNC patient outcome could be improved.
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Affiliation(s)
- Angela B Y Hui
- Department of Pathology, Princess Margaret Hospital/Ontario Cancer Institute, 610 University Avenue, Toronto, Ontario, Canada, M5G 2M9
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Sharma A, Bhat MK. Enhancement of carboplatin- and quercetin-induced cell death by roscovitine is Akt dependent and p53 independent in hepatoma cells. Integr Cancer Ther 2011; 10:NP4-14. [PMID: 21994207 DOI: 10.1177/1534735411423922] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Hepatocellular carcinoma (HCC) is a common malignancy worldwide and has an annual occurrence of one million new cases. Novel therapeutic strategies of increased efficacy in the treatment of HCC-bearing patients would certainly be helpful. Hence, the authors explored the effect of combination treatment of roscovitine with chemotherapeutic drugs or quercetin (Qctn) in hepatoma cells, HepG2 and Hep3B. METHODS Cell viability was assessed by MTT assay, cell growth assay, and nuclear morphological changes by DAPI staining. The altered expression of signaling proteins and apoptotic molecules was established by Western blotting. RESULTS Roscovitine pretreatment considerably enhanced the drugs and Qctn-induced cell death in HepG2 and Hep3B cells. The exploratory studies revealed that augmented cell killing in HepG2 and Hep3B was mediated via Akt pathway and was independent of p53. pAkt was found to be significantly downregulated in combination treatment of roscovitine with carboplatin or Qctn. Corresponding to reduced expression of pAkt, the downstream molecules Bcl-2 and proactive forms of caspase 9 and caspase 3 were also downregulated indicating apoptosis. CONCLUSIONS The present study reports for the first time, in hepatoma cells, the potentiation of carboplatin- and Qctn-induced cell death by the cell cycle inhibitor roscovitine. Roscovitine can thus be considered as a potential therapeutic target in combination with chemotherapeutic drugs or Qctn for treatment of HCC.
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Pizarro JG, Folch J, Junyent F, Verdaguer E, Auladell C, Beas-Zarate C, Pallàs M, Camins A. Antiapoptotic effects of roscovitine on camptothecin-induced DNA damage in neuroblastoma cells. Apoptosis 2011; 16:536-50. [PMID: 21424556 DOI: 10.1007/s10495-011-0583-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In the present study dopaminergic neuroblastoma B65 cells were exposed to Camptothecin (CPT) (0.5-10 μM), either alone or in the presence of roscovitine (ROSC). The results show that CPT induces apoptosis through the activation of ataxia telangiectasia mutated (ATM)-induced cell-cycle alteration in neuroblastoma B65 cells. The apoptotic process is mediated through the activation of cystein proteases, namely calpain/caspases. However, whereas a pan-caspase inhibitor, zVADfmk, inhibited CPT-mediated apoptosis, a calpain inhibitor, calpeptin, did not prevent cell death. Interestingly, CPT also induces CDK5 activation and ROSC (25 μM) blocked CDK5, ATM activation and apoptosis (as measured by caspase-3 activation). By contrast, selective inhibition of ATM, by KU55933, and non-selective inhibition, by caffeine, did not prevent CPT-mediated apoptosis. Thus, we conclude that CDK5 is activated in response to DNA damage and that CDK5 inhibition prevents ATM and p53ser15 activation. However, pharmacological inhibition of ATM using KU55933 and caffeine suggests that ATM inhibition by ROSC is not the only mechanism that might explain the anti-apoptotic effects of this drug in this apoptosis model. Our findings have a potential clinical implication, suggesting that combinatory drugs in the treatment of cancer activation should be administered with caution.
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Affiliation(s)
- Javier G Pizarro
- Centros de Investigación Biomédica en Red Enfermedades Neurodegenerativas, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina, Universitat de Barcelona, Nucli Universitari de Pedralbes, Spain
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Arısan ED, Coker A, Palavan-Ünsal N. Polyamine depletion enhances the roscovitine-induced apoptosis through the activation of mitochondria in HCT116 colon carcinoma cells. Amino Acids 2011; 42:655-65. [PMID: 21809075 DOI: 10.1007/s00726-011-1040-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Accepted: 05/24/2011] [Indexed: 12/15/2022]
Abstract
Small molecule inhibitors of cyclin-dependent kinases (CDKs) show high therapeutic potential in various cancer types which are characterized by the accumulation of transformed cells due to impaired apoptotic machinery. Roscovitine, a CDK inhibitor showed to be a potent apoptotic inducer in several cancer cells. Polyamines, putrescine, spermidine and spermine, are biogenic amines involved in many cellular processes, including apoptosis. In this study, we explored the potential role of polyamines in roscovitine-induced apoptosis in HCT116 colon cancer cells. Roscovitine induced apoptosis by activating mitochondrial pathway caspases and modulating the expression of Bcl-2 family members. Depletion of polyamines by treatment with difluoromethylornithine (DFMO) increased roscovitine-induced apoptosis. Transient silencing of ornithine decarboxylase, polyamine biosynthesis enzyme and special target of DFMO also increased roscovitine-induced apoptosis in HCT116 cells. Interestingly, additional putrescine treatment was found pro-apoptotic due to the presence of non-functional ornithine decarboxylase (ODC). Finally, roscovitine altered polyamine catabolic pathway and led to decrease in putrescine and spermidine levels. Therefore, the metabolic regulation of polyamines may dictate the power of roscovitine induced apoptotic responses in HCT116 colon cancer cells.
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Affiliation(s)
- Elif Damla Arısan
- Molecular Biology and Genetics Department, Istanbul Kultur University, Science and Literature Faculty, Atakoy Campus, 34156, Istanbul, Turkey
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Walsby E, Lazenby M, Pepper C, Burnett AK. The cyclin-dependent kinase inhibitor SNS-032 has single agent activity in AML cells and is highly synergistic with cytarabine. Leukemia 2011; 25:411-9. [PMID: 21212792 DOI: 10.1038/leu.2010.290] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
SNS-032 (BMS-387032) is a selective cyclin-dependent kinase (CDK) inhibitor. In this study, we evaluated its effects on primary acute myeloid leukemia (AML) samples (n=87). In vitro exposure to SNS-032 for 48 h resulted in a mean LD(50) of 139±203 nM; Cytarabine (Ara-C) was more than 35 times less potent in the same cohort. SNS-032-induced a dose-dependent increase in annexin V staining and caspase-3 activation. At the molecular level, SNS-032 induced a marked dephosphorylation of serine 2 and 5 of RNA polymerase (RNA Pol) II and inhibited the expression of CDK2 and CDK9 and dephosphorylated CDK7. Furthermore, the combination of SNS-032 and Ara-C showed remarkable synergy that was associated with reduced mRNA levels of the antiapoptotic genes XIAP, BCL2 and MCL1. In conclusion, SNS-032 is effective as a single agent and in combination with Ara-C in primary AML blasts. Treatment with Ara-C alone significantly induced the transcription of the antiapoptotic genes BCL2 and XIAP. In contrast, the combination of SNS-032 and Ara-C suppressed the transcription of BCL2, XIAP and MCL1. Therefore, the combination of SNS-032 and Ara-C may increase the sensitivity of AML cells to the cytotoxic effects of Ara-C by inhibiting the transcription of antiapoptotic genes.
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Affiliation(s)
- E Walsby
- Cardiff Experimental Cancer Medicine Centre, Department of Haematology, School of Medicine, Cardiff University, Heath Park, Cardiff, UK.
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Federico M, Symonds CE, Bagella L, Rizzolio F, Fanale D, Russo A, Giordano A. R-Roscovitine (Seliciclib) prevents DNA damage-induced cyclin A1 upregulation and hinders non-homologous end-joining (NHEJ) DNA repair. Mol Cancer 2010; 9:208. [PMID: 20684776 PMCID: PMC3224749 DOI: 10.1186/1476-4598-9-208] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Accepted: 08/04/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND CDK-inhibitors can diminish transcriptional levels of cell cycle-related cyclins through the inhibition of E2F family members and CDK7 and 9. Cyclin A1, an E2F-independent cyclin, is strongly upregulated under genotoxic conditions and functionally was shown to increase NHEJ activity. Cyclin A1 outcompetes with cyclin A2 for CDK2 binding, possibly redirecting its activity towards DNA repair. To see if we could therapeutically block this switch, we analyzed the effects of the CDK-inhibitor R-Roscovitine on the expression levels of cyclin A1 under genotoxic stress and observed subsequent DNA damage and repair mechanisms. RESULTS We found that R-Roscovitine alone was unable to alter cyclin A1 transcriptional levels, however it was able to reduce protein expression through a proteosome-dependent mechanism. When combined with DNA damaging agents, R-Roscovitine was able to prevent the DNA damage-induced upregulation of cyclin A1 on a transcriptional and post-transcriptional level. This, moreover resulted in a significant decrease in non-homologous end-joining (NHEJ) paired with an increase in DNA DSBs and overall DNA damage over time. Furthermore, microarray analysis demonstrated that R-Roscovitine affected DNA repair mechanisms in a more global fashion. CONCLUSIONS Our data reveal a new mechanism of action for R-Roscovitine on DNA repair through the inhibition of the molecular switch between cyclin A family members under genotoxic conditions resulting in reduced NHEJ capability.
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Affiliation(s)
- Mario Federico
- Sbarro Health Research Organization, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania, USA.
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Razak ARA, Siu LL, Liu FF, Ito E, O'Sullivan B, Chan K. Nasopharyngeal carcinoma: the next challenges. Eur J Cancer 2010; 46:1967-78. [PMID: 20451372 DOI: 10.1016/j.ejca.2010.04.004] [Citation(s) in RCA: 173] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 04/06/2010] [Indexed: 12/12/2022]
Abstract
Nasopharyngeal carcinoma (NPC) differs from other head and neck cancers in its aetiology, epidemiology and potential therapeutic options. Despite cure for the majority of the patients, challenges still exist in the prevention of disease relapse, treatment of patients with refractory or metastatic NPC and the management of long-term toxicities. This article discusses the specific challenges in pushing the boundaries of NPC treatments further, with an emphasis on prognostic/predictive markers, molecularly targeted therapies, immunotherapies and the areas of interest with regard to long-term toxicities arising from therapeutic interventions.
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Affiliation(s)
- Albiruni R A Razak
- Division of Medical Oncology and Haematology, Princess Margaret Hospital, University of Toronto, Toronto, Ontario, Canada
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27
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Bettayeb K, Baunbæk D, Delehouze C, Loaëc N, Hole AJ, Baumli S, Endicott JA, Douc-Rasy S, Bénard J, Oumata N, Galons H, Meijer L. CDK Inhibitors Roscovitine and CR8 Trigger Mcl-1 Down-Regulation and Apoptotic Cell Death in Neuroblastoma Cells. Genes Cancer 2010; 1:369-80. [PMID: 21779453 PMCID: PMC3092200 DOI: 10.1177/1947601910369817] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Neuroblastoma (NB), the most frequent extracranial solid tumor of children accounting for nearly 15% of all childhood cancer mortality, displays overexpression of antiapoptotic Bcl-2 and Mcl-1 in aggressive forms of the disease. The clinical phase 2 drug roscovitine (CYC202, seliciclib), a relatively selective inhibitor of cyclin-dependent kinases (CDKs), and CR8, a recently developed and more potent analog, induce concentration-dependent apoptotic cell death of NB cells (average IC(50) values: 24.2 µM and 0.4 µM for roscovitine and CR8, respectively). Both roscovitine and CR8 trigger rapid down-regulation of the short-lived survival factor Mcl-1 in the 9 investigated human NB cell lines. This effect was further analyzed in the human SH-SY5Y NB cell line. Down-regulation of Mcl-1 appears to depend on inhibition of CDKs rather than on interaction of roscovitine and CR8 with their secondary targets. CR8 is an adenosine triphosphate-competitive inhibitor of CDK9, and the structure of a CDK9/cyclin T/CR8 complex is described. Mcl-1 down-regulation occurs both at the mRNA and protein levels. This effect can be accounted for by a reduction in Mcl-1 protein synthesis, under stable Mcl-1 degradation conditions. Mcl-1 down-regulation is accompanied by a transient increase in free Noxa, a proapoptotic factor. Mcl-1 down-regulation occurs independently of the presence or up-regulation of p53 and of the MYCN status. Taken together, these results suggest that the clinical drug roscovitine and its novel analog CR8 induce apoptotic tumor cell death by down-regulating Mcl-1, a key survival factor expressed in all NB cell lines. CDK inhibition may thus constitute a new approach to treat refractory high-risk NB.
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Affiliation(s)
- Karima Bettayeb
- C.N.R.S. USR3151, ‘Protein Phosphorylation & Human Disease’ Group, Station Biologique, Bretagne, France
- Laboratory of Molecular & Cellular Neuroscience (Prof. Paul Greengard), The Rockefeller University, New York, NY, USA
| | - Dianne Baunbæk
- C.N.R.S. USR3151, ‘Protein Phosphorylation & Human Disease’ Group, Station Biologique, Bretagne, France
| | - Claire Delehouze
- C.N.R.S. USR3151, ‘Protein Phosphorylation & Human Disease’ Group, Station Biologique, Bretagne, France
- ManRos Therapeutics, Hôtel de Recherche, Centre de Perharidy, 29680 Roscoff, France
| | - Nadège Loaëc
- C.N.R.S. USR3151, ‘Protein Phosphorylation & Human Disease’ Group, Station Biologique, Bretagne, France
| | - Alison J. Hole
- University of Oxford, Department of Biochemistry, Laboratory of Molecular Biophysics, Oxford, UK
| | - Sonja Baumli
- University of Oxford, Department of Biochemistry, Laboratory of Molecular Biophysics, Oxford, UK
| | - Jane A. Endicott
- University of Oxford, Department of Biochemistry, Laboratory of Molecular Biophysics, Oxford, UK
| | - Setha Douc-Rasy
- C.N.R.S. UMR8126, Département de Biologie et Pathologie Médicales, Institut Gustave Roussy, Villejuif, France
| | - Jean Bénard
- C.N.R.S. UMR8126, Département de Biologie et Pathologie Médicales, Institut Gustave Roussy, Villejuif, France
| | - Nassima Oumata
- Laboratoire de Chimie Organique 2, CNRS UMR8601, INSERM U 648, Université Paris-Descartes, Paris, France
- Laboratory of Molecular & Cellular Neuroscience (Prof. Paul Greengard), The Rockefeller University, New York, NY, USA
| | - Hervé Galons
- Laboratoire de Chimie Organique 2, CNRS UMR8601, INSERM U 648, Université Paris-Descartes, Paris, France
| | - Laurent Meijer
- C.N.R.S. USR3151, ‘Protein Phosphorylation & Human Disease’ Group, Station Biologique, Bretagne, France
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Hui ABY, Lenarduzzi M, Krushel T, Waldron L, Pintilie M, Shi W, Perez-Ordonez B, Jurisica I, O'Sullivan B, Waldron J, Gullane P, Cummings B, Liu FF. Comprehensive MicroRNA profiling for head and neck squamous cell carcinomas. Clin Cancer Res 2010; 16:1129-39. [PMID: 20145181 DOI: 10.1158/1078-0432.ccr-09-2166] [Citation(s) in RCA: 294] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The objective of this study is to investigate the significance of microRNAs (miRNA) in patients with locally advanced head and neck squamous cell carcinoma (HNSCC). EXPERIMENTAL DESIGN A global miRNA profiling was done on 51 formalin-fixed archival HNSCC samples using quantitative reverse transcription-PCR approach, correlated with patients' clinical parameters. Functional characterization of HNSCC-associated miRNAs was conducted on three HNSCC cell lines. Cell viability and proliferation were investigated using MTS and clonogenic assays, respectively; cell cycle analyses were assessed using flow cytometry. RESULTS Thirty-eight of the 117 (33%) consistently detected miRNAs were significantly differentially expressed between malignant versus normal tissues. Concordant with previous reports, overexpression of miR-21, miR-155, let-7i, and miR-142-3p and underexpression of miR-125b and miR-375 were detected. Upregulation of miR-423, miR-106b, miR-20a, and miR-16 as well as downregulation of miR-10a were newly observed. Exogenous overexpression of miR-375 in HNSCC cell lines reduced proliferation and clonogenicity and increased cells in sub-G(1). Similar cellular effects were observed in knockdown studies of the miR-106b-25 cluster but with accumulation of cells in G(1) arrest. No major difference was detected in miRNA profiles among laryngeal, oropharyngeal, or hypopharyngeal cancers. miR-451 was found to be the only significantly overexpressed miRNA by 4.7-fold between nonrelapsed and relapsed patients. CONCLUSION We have identified a group of aberrantly expressed miRNAs in HNSCC and showed that underexpression of miR-375 and overexpression of miR-106b-25 cluster might play oncogenic roles in this disease. Further detailed examinations of miRNAs will provide opportunities to dissect the complex molecular abnormalities driving HNSCC progression.
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Affiliation(s)
- Angela B Y Hui
- Division of Applied Molecular Oncology, Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada
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