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Ehrenfeld M, Segeth F, Mantwill K, Brockhaus C, Zhao Y, Ploner C, Kolk A, Gschwend JE, Nawroth R, Holm PS. Targeting Cell Cycle Facilitates E1A-Independent Adenoviral Replication. J Virol 2023; 97:e0037023. [PMID: 37219458 PMCID: PMC10308897 DOI: 10.1128/jvi.00370-23] [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: 03/10/2023] [Accepted: 05/01/2023] [Indexed: 05/24/2023] Open
Abstract
DNA replication of E1-deleted first-generation adenoviruses (AdV) in cultured cancer cells has been reported repeatedly and it was suggested that certain cellular proteins could functionally compensate for E1A, leading to the expression of the early region 2 (E2)-encoded proteins and subsequently virus replication. Referring to this, the observation was named E1A-like activity. In this study, we investigated different cell cycle inhibitors with respect to their ability to increase viral DNA replication of dl70-3, an E1-deleted adenovirus. Our analyses of this issue revealed that in particular inhibition of cyclin-dependent kinases 4/6 (CDK4/6i) increased E1-independent adenovirus E2-expression and viral DNA replication. Detailed analysis of the E2-expression in dl70-3 infected cells by RT-qPCR showed that the increase in E2-expression originated from the E2-early promoter. Mutations of the two E2F-binding sites in the E2-early promoter (pE2early-LucM) caused a significant reduction in E2-early promoter activity in trans-activation assays. Accordingly, mutations of the E2F-binding sites in the E2-early promoter in a virus named dl70-3/E2Fm completely abolished CDK4/6i induced viral DNA replication. Thus, our data show that E2F-binding sites in the E2-early promoter are crucial for E1A independent adenoviral DNA replication of E1-deleted vectors in cancer cells. IMPORTANCE E1-deleted AdV vectors are considered replication deficient and are important tools for the study of virus biology, gene therapy, and large-scale vaccine development. However, deletion of the E1 genes does not completely abolish viral DNA replication in cancer cells. Here, we report, that the two E2F-binding sites in the adenoviral E2-early promoter contribute substantially to the so-called E1A-like activity in tumor cells. With this finding, on the one hand, the safety profile of viral vaccine vectors can be increased and, on the other hand, the oncolytic property for cancer therapy might be improved through targeted manipulation of the host cell.
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Affiliation(s)
- Maximilian Ehrenfeld
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Felicia Segeth
- Department of Oral and Maxillofacial Surgery, Medical University of Innsbruck, Innsbruck, Austria
- Department of Molecular Biology, Leopold-Franzens-Universität Innsbruck, Austria
| | - Klaus Mantwill
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Corinna Brockhaus
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Yuling Zhao
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Christian Ploner
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Andreas Kolk
- Department of Oral and Maxillofacial Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Jürgen E. Gschwend
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Roman Nawroth
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Per Sonne Holm
- Department of Urology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
- Department of Oral and Maxillofacial Surgery, Medical University of Innsbruck, Innsbruck, Austria
- XVir Therapeutics GmbH, Munich, Germany
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2
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Wang W, Zhang R, Wang X, Wang N, Zhao J, Wei Z, Xiang F, Wang C. Suppression of KIF3A inhibits triple negative breast cancer growth and metastasis by repressing Rb-E2F signaling and epithelial-mesenchymal transition. Cancer Sci 2020; 111:1422-1434. [PMID: 32011034 PMCID: PMC7156822 DOI: 10.1111/cas.14324] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 12/16/2019] [Accepted: 12/24/2019] [Indexed: 02/06/2023] Open
Abstract
Triple negative breast cancer (TNBC) displays higher heterogeneity, stronger invasiveness, higher risk of metastasis and poorer prognosis compared with major breast cancer subtypes. KIF3A, a member of the kinesin family of motor proteins, serves as a microtubule-directed motor subunit and has been found to regulate early development, ciliogenesis and tumorigenesis. To explore the expression, regulation and mechanism of KIF3A in TNBC, 3 TNBC cell lines, 98 cases of primary TNBC and paired adjacent tissues were examined. Immunohistochemistry, real-time PCR, western blot, flow cytometry, short hairpin RNA (shRNA) interference, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), colony formation techniques, transwell assays, scratch tests, and xenograft mice models were used. We found that KIF3A was overexpressed in TNBC and such high KIF3A expression was also associated with tumor recurrence and lymph node metastasis. Silencing of KIF3A suppressed TNBC cell proliferation by repressing the Rb-E2F signaling pathway and inhibited migration and invasion by repressing epithelial-mesenchymal transition. The tumor size was smaller and the number of lung metastatic nodules was lower in KIF3A depletion MDA-MB-231 cell xenograft mice than in the negative control group. In addition, KIF3A overexpression correlated with chemoresistance. These results suggested that high expression of KIF3A in TNBC was associated with the tumor progression and metastasis.
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Affiliation(s)
- Weilin Wang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
| | - Runze Zhang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
| | - Xiao Wang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
- Department of PathologyThe Affiliated Hospital of Qingdao UniversityQingdaoChina
| | - Ning Wang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
| | - Jing Zhao
- Department of PathologyThe Affiliated Hospital of Qingdao UniversityQingdaoChina
| | - Zhimin Wei
- Department of PathologyThe Affiliated Hospital of Qingdao UniversityQingdaoChina
| | - Fenggang Xiang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
- Department of PathologyThe Affiliated Hospital of Qingdao UniversityQingdaoChina
| | - Chengqin Wang
- Department of PathologySchool of Basic MedicineQingdao UniversityQingdaoChina
- Department of PathologyThe Affiliated Hospital of Qingdao UniversityQingdaoChina
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3
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Li Y, Cao Y, Wang J, Fu S, Cheng J, Ma L, Zhang Q, Guo W, Kan X, Liu J. Kp-10 promotes bovine mammary epithelial cell proliferation by activating GPR54 and its downstream signaling pathways. J Cell Physiol 2019; 235:4481-4493. [PMID: 31621904 DOI: 10.1002/jcp.29325] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/30/2019] [Indexed: 12/24/2022]
Abstract
It has been reported that the proliferation and apoptosis of mammary epithelial cells affect milk production. Therefore, ensuring adequate mammary epithelial cells is expected to enhance milk production. This study is devoted to studying the effects of kisspeptin-10 (Kp-10), a peptide hormone composed of 10 amino acids, on bovine mammary epithelial cell (bMEC) proliferation and exploring the underlying mechanism of its action. bMECs were treated with various concentrations of Kp-10 (1, 10, 100, and 1,000 nM), and 100 nM Kp-10 promoted the proliferation of the bMECs. Kp-10 promoted the cell cycle transition from G1 to the S and G2 phases, increased the protein levels of Cyclin D1 and Cyclin D3, and reduced the expression levels of the p21 gene. This study also showed that inhibition of G protein-coupled receptor 54 (GPR54), AKT, mTOR, and ERK1/2 reduced the proliferation of the bMECs that had been induced by Kp-10. In addition, Kp-10 decreased the complexes formed by Rb and E2F1 and increased the expression levels of the E2F1 target genes. These results indicate that Kp-10 promotes bMEC proliferation by activating GPR54 and its downstream signaling pathways.
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Affiliation(s)
- Yanwei Li
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Yu Cao
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Jiaxin Wang
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Shoupeng Fu
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Ji Cheng
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Lijun Ma
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Qing Zhang
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Wenjin Guo
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Xingchi Kan
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Juxiong Liu
- Department of Theoretic Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
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4
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Chang MM, Lai MS, Hong SY, Pan BS, Huang H, Yang SH, Wu CC, Sun HS, Chuang JI, Wang CY, Huang BM. FGF9/FGFR2 increase cell proliferation by activating ERK1/2, Rb/E2F1, and cell cycle pathways in mouse Leydig tumor cells. Cancer Sci 2018; 109:3503-3518. [PMID: 30191630 PMCID: PMC6215879 DOI: 10.1111/cas.13793] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/27/2018] [Accepted: 08/30/2018] [Indexed: 12/19/2022] Open
Abstract
Fibroblast growth factor 9 (FGF9) promotes cancer progression; however, its role in cell proliferation related to tumorigenesis remains elusive. We investigated how FGF9 affected MA‐10 mouse Leydig tumor cell proliferation and found that FGF9 significantly induced cell proliferation by activating ERK1/2 and retinoblastoma (Rb) phosphorylations within 15 minutes. Subsequently, the expressions of E2F1 and the cell cycle regulators: cyclin D1, cyclin E1 and cyclin‐dependent kinase 4 (CDK4) in G1 phase and cyclin A1, CDK2 and CDK1 in S‐G2/M phases were increased at 12 hours after FGF9 treatment; and cyclin B1 in G2/M phases were induced at 24 hours after FGF9 stimulation, whereas the phosphorylations of p53, p21 and p27 were not affected by FGF9. Moreover, FGF9‐induced effects were inhibited by MEK inhibitor PD98059, indicating FGF9 activated the Rb/E2F pathway to accelerate MA‐10 cell proliferation by activating ERK1/2. Immunoprecipitation assay and ChIP‐quantitative PCR results showed that FGF9‐induced Rb phosphorylation led to the dissociation of Rb‐E2F1 complexes and thereby enhanced the transactivations of E2F1 target genes, Cyclin D1, Cyclin E1 and Cyclin A1. Silencing of FGF receptor 2 (FGFR2) using lentiviral shRNA inhibited FGF9‐induced ERK1/2 phosphorylation and cell proliferation, indicating that FGFR2 is the obligate receptor for FGF9 to bind and activate the signaling pathway in MA‐10 cells. Furthermore, in a severe combined immunodeficiency mouse xenograft model, FGF9 significantly promoted MA‐10 tumor growth, a consequence of increased cell proliferation and decreased apoptosis. Conclusively, FGF9 interacts with FGFR2 to activate ERK1/2, Rb/E2F1 and cell cycle pathways to induce MA‐10 cell proliferation in vitro and tumor growth in vivo.
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Affiliation(s)
- Ming-Min Chang
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Meng-Shao Lai
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Siou-Ying Hong
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bo-Syong Pan
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Hsin Huang
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shang-Hsun Yang
- Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Ching Wu
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - H Sunny Sun
- Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jih-Ing Chuang
- Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Yih Wang
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bu-Miin Huang
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
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5
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Going viral: a review of replication-selective oncolytic adenoviruses. Oncotarget 2016; 6:19976-89. [PMID: 26280277 PMCID: PMC4652981 DOI: 10.18632/oncotarget.5116] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/09/2015] [Indexed: 12/12/2022] Open
Abstract
Oncolytic viruses have had a tumultuous course, from the initial anecdotal reports of patients having antineoplastic effects after natural viral infections a century ago to the development of current cutting-edge therapies in clinical trials. Adenoviruses have long been the workhorse of virotherapy, and we review both the scientific and the not-so-scientific forces that have shaped the development of these therapeutics from wild-type viral pathogens, turning an old foe into a new friend. After a brief review of the mechanics of viral replication and how it has been modified to engineer tumor selectivity, we give particular attention to ONYX-015, the forerunner of virotherapy with extensive clinical testing that pioneered the field. The findings from those as well as other oncolytic trials have shaped how we now view these viruses, which our immune system has evolved to vigorously attack, as promising immunotherapy agents.
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6
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Chang TY, Chen HA, Chiu CF, Chang YW, Kuo TC, Tseng PC, Wang W, Hung MC, Su JL. Dicer Elicits Paclitaxel Chemosensitization and Suppresses Cancer Stemness in Breast Cancer by Repressing AXL. Cancer Res 2016; 76:3916-28. [PMID: 27216190 DOI: 10.1158/0008-5472.can-15-2555] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Accepted: 03/31/2016] [Indexed: 11/16/2022]
Abstract
Paclitaxel is a standard-of-care chemotherapy for breast cancer, despite the increasing recognition of its poor effectiveness in the treatment of patients with advanced disease. Here, we report that adenovirus-type 5 E1A-mediated elevation of the miRNA-processing enzyme Dicer is sufficient to enhance paclitaxel sensitization and reduce cancer stem-like cell properties in this setting. Elevating Dicer expression increased levels of the AXL kinase targeting miRNA miR-494, thereby repressing AXL expression to increase paclitaxel sensitivity. We found that Dicer expression was regulated at the transcription level by E1A, through activation of an MAPK14/CEBPα pathway. Our findings define a mechanism of E1A-mediated chemosensitization for paclitaxel, which is based upon the suppression of breast cancer stem-like cells, with potential implications for the diagnosis and treatment of breast cancer patients. Cancer Res; 76(13); 3916-28. ©2016 AACR.
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Affiliation(s)
- Ting-Yu Chang
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
| | - Hsin-An Chen
- Department of General Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan. Division of General Surgery, Department of Surgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan. Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ching-Feng Chiu
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
| | - Yi-Wen Chang
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
| | - Tsang-Chih Kuo
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Po-Chun Tseng
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Weu Wang
- Department of Surgery, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Mien-Chie Hung
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Jen-Liang Su
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Miaoli County, Taiwan. Department of Biotechnology, Asia University, Taichung, Taiwan. Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan. Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan.
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7
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Opposing oncogenic activities of small DNA tumor virus transforming proteins. Trends Microbiol 2011; 19:174-83. [PMID: 21330137 DOI: 10.1016/j.tim.2011.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Revised: 01/04/2011] [Accepted: 01/12/2011] [Indexed: 01/10/2023]
Abstract
The E1A gene of species C human adenovirus is an intensely investigated model viral oncogene that immortalizes primary cells and mediates oncogenic cell transformation in cooperation with other viral or cellular oncogenes. Investigations using E1A proteins have illuminated important paradigms in cell proliferation and about the functions of cellular proteins such as the retinoblastoma protein. Studies with E1A have led to the unexpected discovery that E1A also suppresses cell transformation and oncogenesis. Here, I review our current understanding of the transforming and tumor-suppressive functions of E1A, and how E1A studies led to the discovery of a related tumor-suppressive function in benign human papillomaviruses. The potential role of these opposing functions in viral replication in epithelial cells is also discussed.
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Fang L, Huang Y, Hu X, Sun L, He X, Hu H, Pu Y, Cao X, Luo H, Pan S, Gu J, Su C. A truncated minimal-E1a gene with potency to support adenoviral replication mediates antitumor activity by down-regulating Neu expression and preserving Rb function. Chem Biol Interact 2009; 181:1-7. [PMID: 19523934 DOI: 10.1016/j.cbi.2009.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2009] [Revised: 05/21/2009] [Accepted: 06/02/2009] [Indexed: 10/20/2022]
Abstract
Oncolytic adenovirus is capable of infecting, replicating in and lysing cancer cells. In adenovirus infection and replication, the wild type E1a gene (wE1a) mediates various genetic events to facilitate viral replication and exert antitumor effect. To enhance its antitumor efficacy and optimize its safety, we manipulated the wE1a gene and designed a 720-bp truncated minimal-E1a (mE1a) by deletions and mutations of amino acid residues. The mE1a gene was incorporated in an adenovirus under the control of hTERT promoter, giving the vector AdDC315-mE1a. A variety of cancer cell lines infected with the virus expressed the mE1a protein and showed considerable down-regulation in Neu protein expression as compared to normal cell lines. mE1a also had a lower binding affinity to the Rb protein, preserving the Rb tumor suppressive function. The mE1a expression allowed efficient adenovirus replication with high and stable replication ratios in cancer cells (about 125- to 8500-fold higher at 48 h and 180- to 10,900-fold higher at 96 h post-infection). Further, the mE1a-supported oncolytic adenovirus induced higher cancer cell apoptosis, stronger cell cycle arrest and more effective antitumor efficacy in hepatocarcinoma xenografts in nude mice. In conclusion, the truncated minimal mE1a can act as a tumor inhibitor gene, and may be used to construct oncolytic adenovirus vectors for use in gene therapy of a variety of cancers.
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Affiliation(s)
- Lin Fang
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Nanjing Normal University, Nanjing, China
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