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Li H, Ngan HL, Liu Y, Chan HHY, Poon PHY, Yeung CK, Peng Y, Lam WY, Li BX, He Y, Lui VWY. Comprehensive Exome Analysis of Immunocompetent Metastatic Head and Neck Cancer Models Reveals Patient Relevant Landscapes. Cancers (Basel) 2020; 12:cancers12102935. [PMID: 33053752 PMCID: PMC7601118 DOI: 10.3390/cancers12102935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 01/04/2023] Open
Abstract
Immunocompetent metastatic head and neck cancer (HNC) models, although scarce, can help understanding cancer progression and therapy responses in vivo. Their comprehensive genome characterizations are essential for translational research. We first exome-sequenced the two most widely used spontaneous metastatic immunocompetent models, namely AT-84 and SCC VII, followed by comprehensive genomic analyses with three prior-sequenced models (MOC2, MOC2-10, and 4MOSC2), together with patient tumors for utility assessment. AT-84 and SCC VII bear high HNC tumor resemblance regarding mutational signatures-Trp53, Fanconi anemia, and MAPK and PI3K pathway defects. Collectively, the five models harbor genetic aberrations across 10 cancer hallmarks and 14 signaling pathways and machineries (metabolic, epigenetic, immune evasion), to extents similar in patients. Immune defects in HLA-A (H2-Q10, H2-Q4, H2-Q7, and H2-K1), Pdcd1, Tgfb1, Il2ra, Il12a, Cd40, and Tnfrsf14 are identified. Invasion/metastatic genome analyses first highlight potential druggable ERBB4 and KRAS mutations, for advanced/metastatic oral cavity cancer, as well as known metastasis players (Muc5ac, Trem3, Trp53, and Ttn) frequently captured by all models. Notable immunotherapy and precision druggable targets (Pdcd1, Erbb4, Fgfr1, H/Kras, Jak1, and Map2k2) and three druggable hubs (RTK family, MAPK, and DNA repair pathways) are frequently represented by these models. Immunocompetent metastatic HNC models are worth developing to address therapy- and invasion/metastasis-related questions in host immunity contexts.
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Affiliation(s)
- Hui Li
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Hoi-Lam Ngan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Yuchen Liu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Helen Hoi Yin Chan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Peony Hiu Yan Poon
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Chun Kit Yeung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
| | - Yibing Peng
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (Y.P.); (Y.H.)
| | - Wai Yip Lam
- Lee’s Pharmaceutical (HK) Limited, Hong Kong Science Park, Hong Kong SAR, China; (W.Y.L.); (B.X.L.)
| | - Benjamin Xiaoyi Li
- Lee’s Pharmaceutical (HK) Limited, Hong Kong Science Park, Hong Kong SAR, China; (W.Y.L.); (B.X.L.)
| | - Yukai He
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (Y.P.); (Y.H.)
| | - Vivian Wai Yan Lui
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (H.L.); (H.-L.N.); (Y.L.); (H.H.Y.C.); (P.H.Y.P.); (C.K.Y.)
- Correspondence: ; Tel.: +852-3943-5388; Fax: +852-2603-5123
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Marcazzan S, Dadbin A, Brachi G, Blanco E, Varoni EM, Lodi G, Ferrari M. Development of lung metastases in mouse models of tongue squamous cell carcinoma. Oral Dis 2020; 27:494-505. [PMID: 32767730 DOI: 10.1111/odi.13592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Oral squamous cell carcinoma (OSCC) represents 3%-4% of all cancers. Despite the increasing incidence of OSCC distant metastasis and poor prognosis, few animal models of OSCC distant metastasis have been reported. In this study, we established mouse models of OSCC lung metastasis by orthotopic and tail vein injection of new OSCC cell lines. METHODS For the tail vein model, we used a novel cell line isolated from lung metastases reproduced in vivo after intravenous injection of HSC-3 GFP/luciferase cells and sorted for GFP expression (HSC-3 M1 GFP/luciferase). Lung metastases were assessed by imaging techniques and further confirmed by histology. For the orthotopic model, HSC-3 GFP/luciferase cells were injected into the tongue of athymic nude mice. The primary tumor and metastases were assessed by in vivo imaging, histology, and immunohistochemistry. RESULTS The orthotopic model presented spontaneous lung metastases in 50% of the animals and lymph node metastases were present in 83% of cases. In the tail vein model, a lung metastasis rate of 60% was observed. CONCLUSIONS Lung metastases were successfully reproduced by orthotopic and tail vein injection. Since lymph node metastases were present, the orthotopic model with HSC-3 GFP/luciferase cells may be suitable to investigate metastatic dissemination in OSCC.
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Affiliation(s)
- Sabrina Marcazzan
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Università degli Studi di Milano, Milan, Italy.,Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Ali Dadbin
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Giulia Brachi
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA.,Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | - Elvin Blanco
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Elena Maria Varoni
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Università degli Studi di Milano, Milan, Italy
| | - Giovanni Lodi
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Università degli Studi di Milano, Milan, Italy
| | - Mauro Ferrari
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
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Rossa C, D'Silva NJ. Immune-relevant aspects of murine models of head and neck cancer. Oncogene 2019; 38:3973-3988. [PMID: 30696955 PMCID: PMC6533118 DOI: 10.1038/s41388-019-0686-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/26/2018] [Accepted: 12/05/2018] [Indexed: 12/19/2022]
Abstract
Head and neck cancers (HNCs) cause significant mortality and morbidity. There have been few advances in therapeutic management of HNC in the past 4 to 5 decades, which support the need for studies focusing on HNC biology. In recent years, increased recognition of the relevance of the host response in cancer progression has led to novel therapeutic strategies and putative biomarkers of tumor aggressiveness. However, tumor-immune interactions are highly complex and vary with cancer type. Pre-clinical, in vivo models represent an important and necessary step in understanding biological processes involved in development, progression and treatment of HNC. Rodents (mice, rats, hamsters) are the most frequently used animal models in HNC research. The relevance and utility of information generated by studies in murine models is unquestionable, but it is also limited in application to tumor-immune interactions. In this review, we present information regarding the immune-specific characteristics of the murine models most commonly used in HNC research, including immunocompromised and immunocompetent animals. The particular characteristics of xenograft, chemically induced, syngeneic, transgenic, and humanized models are discussed in order to provide context and insight for researchers interested in the in vivo study of tumor-immune interactions in HNC.
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Affiliation(s)
- Carlos Rossa
- Department of Diagnosis and Surgery, UNESP-State University of Sao Paulo, School of Dentistry at Araraquara, Araraquara - SP, Brazil. .,Department of Periodontics and Oral Medicine, School of Dentistry, Ann Arbor, MI, 48109, USA.
| | - Nisha J D'Silva
- Department of Periodontics and Oral Medicine, School of Dentistry, Ann Arbor, MI, 48109, USA. .,Department of Pathology, Medical School, University of Michigan, Ann Arbor, MI, 48109, USA.
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Ahn MY. HDAC inhibitor apicidin suppresses murine oral squamous cell carcinoma cell growth in vitro and in vivo via inhibiting HDAC8 expression. Oncol Lett 2018; 16:6552-6560. [PMID: 30405794 PMCID: PMC6202526 DOI: 10.3892/ol.2018.9468] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/23/2018] [Indexed: 01/14/2023] Open
Abstract
Apicidin, a cyclic peptide histone deacetylase (HDAC) inhibitor, has been demonstrated to exhibit antitumor activity in a number of human cancer types. The present study examined the antitumor activity of apicidin in murine oral squamous cell carcinoma (OSCC) cells. Inhibition of cell proliferation and the expression of selective HDACs were determined in apicidin-treated AT-84 murine OSCC cells. A C3H mouse model with subcutaneous injection of AT-84 cells was used to assess the in vivo effect of apicidin on tumor growth. Apicidin-induced cell growth inhibition and selectively reduced HDAC8 expression in AT-84 cells. Induction of apoptosis and autophagy was observed in apicidin-treated AT-84 cells. Apicidin notably inhibited tumor growth by up to 46% relative to the control group at the end of a 14-day period in a murine tumor model. The immunohistochemistry results in tumor tissues indicated that apicidin inhibited cell proliferation and induced apoptosis and autophagy in AT-84 cell-derived tumor tissues. Overexpression of HDAC8 was observed in the nucleus and cytoplasm in tumor tissues and apicidin significantly inhibited the level of HDAC8 expression, compared with the vehicle group. These results indicated that apicidin inhibited cell proliferation through HDAC8 inhibition in murine OSCC cells in vitro and in vivo. The present study indicated that apicidin may be an effective therapeutic agent for OSCC.
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Affiliation(s)
- Mee-Young Ahn
- Department of Pharmaceutical Engineering, Division of Bio-industry, College of Medical and Life Sciences, Silla University, Busan 46958, Republic of Korea
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Pyter LM, McKim DB, Husain Y, Calero H, Godbout JP, Sheridan JF, Marucha PT, Engeland CG. Effects of dermal wounding on distal primary tumor immunobiology in mice. J Surg Res 2018; 221:328-335. [PMID: 29229147 PMCID: PMC5788460 DOI: 10.1016/j.jss.2017.09.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/04/2017] [Accepted: 09/15/2017] [Indexed: 12/30/2022]
Abstract
BACKGROUND Before primary oral tumors are treated, various prophylactic procedures that require tissue repair are often necessary (e.g. biopsies, tooth extractions, radiation, and tracheotomies). Wound healing and tumor growth harness similar immune/inflammatory mechanisms. Our previous work indicates that tumors impair wound healing, although the extent to which tissue repair conversely influences tumor growth is poorly understood. Here, we test the hypothesis that dermal wound healing exacerbates primary tumor growth and influences tumor immunobiology. MATERIALS AND METHODS Female, immunocompetent mice were inoculated subcutaneously with murine oral cancer cells (AT-84) to induce flank tumors. Half of the mice received dermal excisional wounds (4 × 3.5 mm diameter) on their dorsum 16 days later, whereas the skin of controls remained intact. Tumor and blood tissues were harvested 1 and 5 days post wounding, and tumor myeloid cell populations and inflammatory gene expression were measured. Circulating myeloid cells, cytokines, and corticosterone were also quantified. RESULTS Wounding increased tumor mass, early tumor infiltration of macrophages, and tumor inflammatory gene expression. While wounding attenuated tumor growth-induced increases in circulating myeloid cells, no effects of wounding on circulating cytokine/endocrine measures were observed. CONCLUSIONS These results indicate that modest skin immune/inflammatory processes can enhance distal tumor growth and alter innate tumor immunity. The implication for this work is that, in the presence of a tumor, the benefits of tissue-damaging procedures that occur clinically must be weighed against the potential consequences for tumor biology.
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Affiliation(s)
- Leah M Pyter
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, Ohio; Departments of Psychiatry and Behavioral Health, Ohio State University, Columbus, Ohio; Department of Neuroscience, Ohio State University, Columbus, Ohio; Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois.
| | - Daniel B McKim
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Yasmin Husain
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois
| | - Humberto Calero
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois
| | - Jonathan P Godbout
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, Ohio; Department of Neuroscience, Ohio State University, Columbus, Ohio
| | - John F Sheridan
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, Ohio; Department of Biosciences, College of Dentistry, Ohio State University, Columbus, Ohio
| | - Phillip T Marucha
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois
| | - Christopher G Engeland
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois
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Bever SR, Liu X, Quan N, Pyter LM. Euflammation Attenuates Central and Peripheral Inflammation and Cognitive Consequences of an Immune Challenge after Tumor Development. Neuroimmunomodulation 2017; 24:74-86. [PMID: 28898868 PMCID: PMC5788296 DOI: 10.1159/000479184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/04/2017] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE Repeated subthreshold bacterial exposures in rodents cause novel euflammation that attenuates neuroinflammation and sickness behaviors upon subsequent infectious challenges to the host without eliciting illness behavior. The investigation of bacterial exposure effects on brain and behavior is clinically relevant because bacterial-based antitumor treatments are used successfully, but are suboptimal due to their illness side effects. In addition, behavioral consequences (depression, cognitive impairments) to homeostatic challenges that are associated with inflammation are prevalent and reduce the quality of life in cancer patients and survivors. Therefore, this study tested the potential for euflammation to attenuate behavioral consequences of an immune challenge in tumor-bearing mice. METHODS Mice with and without oral tumors in their flank underwent the established peripheral euflammatory protocol or vehicle treatment, followed by an acute peripheral immune challenge (lipopolysaccharide [LPS] injection) or PBS. Cognitive function and sickness behavior were assessed after the challenge, and peripheral and central inflammatory responses were measured. RESULTS Euflammation reduced LPS-induced peripheral and central inflammation in all mice; however, neuroinflammation was less attenuated in tumor-bearing mice compared with tumor-free controls. LPS-induced lethargy and cognitive impairments were more pronounced among tumor-bearing mice and were effectively attenuated with euflammation. Cognitive changes were independent of brain-derived growth factor gene expression in the hippocampus. CONCLUSION These results suggest that induction of euflammation may be useful in alleviating the negative side effects of bacterial-based tumor treatments and in potentially attenuating common behavioral comorbidities associated with cancer or other chronic diseases.
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Affiliation(s)
- Savannah R. Bever
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry and Behavioral Health, Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Xiaoyu Liu
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Division of Biosciences, Ohio State University, Columbus, OH, USA
| | - Ning Quan
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Division of Biosciences, Ohio State University, Columbus, OH, USA
| | - Leah M. Pyter
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry and Behavioral Health, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH, USA
- Behavioral Neuroendocrinology Group, Ohio State University, Columbus, OH, USA
- Arthur G. James Comprehensive Cancer Center and Solove Research Institute, Ohio State University, Columbus, OH USA
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Magnussen SN, Hadler-Olsen E, Costea DE, Berg E, Jacobsen CC, Mortensen B, Salo T, Martinez-Zubiaurre I, Winberg JO, Uhlin-Hansen L, Svineng G. Cleavage of the urokinase receptor (uPAR) on oral cancer cells: regulation by transforming growth factor - β1 (TGF-β1) and potential effects on migration and invasion. BMC Cancer 2017; 17:350. [PMID: 28526008 PMCID: PMC5438506 DOI: 10.1186/s12885-017-3349-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 05/12/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Urokinase plasminogen activator (uPA) receptor (uPAR) is up-regulated at the invasive tumour front of human oral squamous cell carcinoma (OSCC), indicating a role for uPAR in tumour progression. We previously observed elevated expression of uPAR at the tumour-stroma interface in a mouse model for OSCC, which was associated with increased proteolytic activity. The tumour microenvironment regulated uPAR expression, as well as its glycosylation and cleavage. Both full-length- and cleaved uPAR (uPAR (II-III)) are involved in highly regulated processes such as cell signalling, proliferation, migration, stem cell mobilization and invasion. The aim of the current study was to analyse tumour associated factors and their effect on uPAR cleavage, and the potential implications for cell proliferation, migration and invasion. METHODS Mouse uPAR was stably overexpressed in the mouse OSCC cell line AT84. The ratio of full-length versus cleaved uPAR as analysed by Western blotting and its regulation was assessed by addition of different protease inhibitors and transforming growth factor - β1 (TGF-β1). The role of uPAR cleavage in cell proliferation and migration was analysed using real-time cell analysis and invasion was assessed using the myoma invasion model. RESULTS We found that when uPAR was overexpressed a proportion of the receptor was cleaved, thus the cells presented both full-length uPAR and uPAR (II-III). Cleavage was mainly performed by serine proteases and urokinase plasminogen activator (uPA) in particular. When the OSCC cells were stimulated with TGF-β1, the production of the uPA inhibitor PAI-1 was increased, resulting in a reduction of uPAR cleavage. By inhibiting cleavage of uPAR, cell migration was reduced, and by inhibiting uPA activity, invasion was reduced. We could also show that medium containing soluble uPAR (suPAR), and cleaved soluble uPAR (suPAR (II-III)), induced migration in OSCC cells with low endogenous levels of uPAR. CONCLUSIONS These results show that soluble factors in the tumour microenvironment, such as TGF-β1, PAI-1 and uPA, can influence the ratio of full length and uPAR (II-III) and thereby potentially effect cell migration and invasion. Resolving how uPAR cleavage is controlled is therefore vital for understanding how OSCC progresses and potentially provides new targets for therapy.
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Affiliation(s)
- Synnove Norvoll Magnussen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.
| | - Elin Hadler-Olsen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.,Diagnostic Clinic - Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Daniela Elena Costea
- Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Eli Berg
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Cristiane Cavalcanti Jacobsen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Bente Mortensen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Tuula Salo
- Cancer and Translational Research Medicine Unit, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital, Oulu, Finland.,Oral and Maxillofacial diseases, Clinicum, University of Helsinki, Helsinki, Finland.,Helsinki University Hospital Helsinki, Helsinki, Finland.,Department of Oral Diagnosis, Oral Pathology Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, SP-13414-903, Brazil
| | - Inigo Martinez-Zubiaurre
- Department of Clinical Medicine, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Jan-Olof Winberg
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Lars Uhlin-Hansen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.,Diagnostic Clinic - Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Gunbjorg Svineng
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
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Han HY, Lee HE, Kim HJ, Jeong SH, Kim JH, Kim H, Ryu MH. Kochia scoparia induces apoptosis of oral cancer cells in vitro and in heterotopic tumors. JOURNAL OF ETHNOPHARMACOLOGY 2016; 192:431-441. [PMID: 27616033 DOI: 10.1016/j.jep.2016.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/02/2016] [Accepted: 09/07/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Kochia scoparia grows commonly in China, Japan, and Korea and its mature fruit has been used throughout the area in traditional medicine to treat diseases including skin problems and inflammatory and allergic disease. More importantly, Kochia scoparia has been prescribed to treat the malignant tumor of head and neck region and breast mass. Although it has been proposed as an anti-cancer agent for several cancers, its exact in vivo anti-cancer properties and the molecular mechanisms underlying its effects are poorly understood. AIM OF THE STUDY To evaluate the anti-cancer activity of the methanol extract of K. scoparia, mature fruit (MEKS) on oral squamous cell carcinoma (OSCC) and to explore its mode of action. MATERIALS AND METHODS To assess proliferation inhibition and apoptosis induction by MEKS, MTT assays, cell analysis, ANNEXIN V and PI double staining, and Hoechst 33342 staining were performed. The activation of caspases and the MAP kinase p38 was evaluated using Western blot analysis. The anti-cancer properties of MEKS in vivo were elucidated in a heterotopic OSCC animal model. RESULTS After OSCC cells were treated with MEKS, the numbers of sub-G1 accumulated cells and apoptotic bodies increased, indicating that MEKS inhibited OSCC cell proliferation selectively through induction of apoptosis. Apoptosis of MEKS-treated OSCC cells was induced in a dose-dependent manner by caspase-3 and -9 activation. In addition, pretreatment with p38 inhibitor SB203580 in combination with MEKS significantly prevented MEKS-induced apoptosis in OSCC cells and also decreased cleaved capase 3, 9, and cleaved PARP activity in western blotting. MEKS treatment significantly increased the apoptosis of OSCC and inhibited tumour growth in our animal model. CONCLUSION Taken together, these results indicated that MEKS induced apoptosis of OSCC cells through caspase activation involving the p38 MAPK pathway. MEKS could be a promising anti-cancer candidate for OSCC treatment.
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Affiliation(s)
- Hye-Yeon Han
- Department of Oral Pathology, School of Dentistry, Research Institute for Oral Biotechnology, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Haeng-Eun Lee
- Department of Oral Pathology, School of Dentistry, Research Institute for Oral Biotechnology, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Hyung Joon Kim
- Department of Oral Physiology, BK21 Plus Project, School of Dentistry, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Seung-Hwa Jeong
- Department of Preventive and Community Dentistry, BK21 Plus project, School of Dentistry, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Jung-Hoon Kim
- Division of Pharmacology, School of Korean Medicine, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Hyungwoo Kim
- Division of Pharmacology, School of Korean Medicine, Pusan National University, Yangsan, Gyeongnam 50612, South Korea
| | - Mi Heon Ryu
- Department of Oral Pathology, BK21 Plus project, School of Dentistry, Pusan National University, Yangsan, Gyeongnam 50612, South Korea.
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Pyter LM, Husain Y, Calero H, McKim DB, Lin HY, Godbout JP, Sheridan JF, Engeland CG, Marucha PT. Tumors Alter Inflammation and Impair Dermal Wound Healing in Female Mice. PLoS One 2016; 11:e0161537. [PMID: 27548621 PMCID: PMC4993492 DOI: 10.1371/journal.pone.0161537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 08/08/2016] [Indexed: 12/29/2022] Open
Abstract
Tissue repair is an integral component of cancer treatment (e.g., due to surgery, chemotherapy, radiation). Previous work has emphasized the immunosuppressive effects of tumors on adaptive immunity and has shown that surgery incites cancer metastases. However, the extent to which and how tumors may alter the clinically-relevant innate immune process of wound healing remains an untapped potential area of improvement for treatment, quality of life, and ultimately, mortality of cancer patients. In this study, 3.5 mm full-thickness dermal excisional wounds were placed on the dorsum of immunocompetent female mice with and without non-malignant flank AT-84 murine oral squamous cell carcinomas. Wound closure rate, inflammatory cell number and inflammatory signaling in wounds, and circulating myeloid cell concentrations were compared between tumor-bearing and tumor-free mice. Tumors delayed wound closure, suppressed inflammatory signaling, and altered myeloid cell trafficking in wounds. An in vitro scratch “wounding” assay of adult dermal fibroblasts treated with tumor cell-conditioned media supported the in vivo findings. This study demonstrates that tumors are sufficient to disrupt fundamental and clinically-relevant innate immune functions. The understanding of these underlying mechanisms provides potential for therapeutic interventions capable of improving the treatment of cancer while reducing morbidities and mortality.
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Affiliation(s)
- Leah M. Pyter
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Department of Psychiatry and Behavioral Health, Ohio State University, Columbus, OH, United States of America
- Department of Neuroscience, Ohio State University, Columbus, OH, United States of America
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States of America
- * E-mail:
| | - Yasmin Husain
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Humberto Calero
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Daniel B. McKim
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Hsin-Yun Lin
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Department of Psychiatry and Behavioral Health, Ohio State University, Columbus, OH, United States of America
| | - Jonathan P. Godbout
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Department of Neuroscience, Ohio State University, Columbus, OH, United States of America
| | - John F. Sheridan
- Institute for Behavioral Medicine Research, Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Deparment of Biosciences, College of Dentistry, Ohio State University, Columbus, OH, United States of America
| | - Christopher G. Engeland
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States of America
- Department of Biobehavioral Health and College of Nursing, Pennsylvania State University, University Park, PA, United States of America
| | - Phillip T. Marucha
- Center for Wound Healing and Tissue Regeneration, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States of America
- College of Dentistry, Oregon Health and Sciences University, Portland, OR, United States of America
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10
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Venuti A, Curzio G, Mariani L, Paolini F. Immunotherapy of HPV-associated cancer: DNA/plant-derived vaccines and new orthotopic mouse models. Cancer Immunol Immunother 2015; 64:1329-38. [PMID: 26138695 PMCID: PMC4554738 DOI: 10.1007/s00262-015-1734-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 06/06/2015] [Indexed: 12/19/2022]
Abstract
Under the optimistic assumption of high-prophylactic HPV vaccine coverage, a significant reduction of cancer incidence can only be expected after decades. Thus, immune therapeutic strategies are needed for persistently infected individuals who do not benefit from the prophylactic vaccines. However, the therapeutic strategies inducing immunity to the E6 and/or E7 oncoprotein of HPV16 are more effective for curing HPV-expressing tumours in animal models than for treating human cancers. New strategies/technologies have been developed to improve these therapeutic vaccines. Our studies focussed on preparing therapeutic vaccines with low-cost technologies by DNA preparation fused to either plant-virus or plant-toxin genes, such as saporin, and by plant-produced antigens. In particular, plant-derived antigens possess an intrinsic adjuvant activity that makes these preparations especially attractive for future development. Additionally, discrepancy in vaccine effectiveness between animals and humans may be due to non-orthotopic localization of animal models. Orthotopic transplantation leads to tumours giving a more accurate representation of the parent tumour. Since HPV can cause cancer in two main localizations, anogenital and oropharynx area, we developed two orthotopic tumour mouse models in these two sites. Both models are bioluminescent in order to follow up the tumour growth by imaging and are induced by cell injection without the need to intervene surgically. These models were utilized for immunotherapies with genetic or plant-derived therapeutic vaccines. In particular, the head/neck orthotopic model appears to be very promising for studies combining chemo-radio-immune therapy that seems to be very effective in patients.
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Affiliation(s)
- Aldo Venuti
- HPV-UNIT, Laboratory of Virology, Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy,
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11
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Magnussen S, Hadler-Olsen E, Latysheva N, Pirila E, Steigen SE, Hanes R, Salo T, Winberg JO, Uhlin-Hansen L, Svineng G. Tumour microenvironments induce expression of urokinase plasminogen activator receptor (uPAR) and concomitant activation of gelatinolytic enzymes. PLoS One 2014; 9:e105929. [PMID: 25157856 PMCID: PMC4144900 DOI: 10.1371/journal.pone.0105929] [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: 04/03/2014] [Accepted: 07/25/2014] [Indexed: 11/19/2022] Open
Abstract
Background The urokinase plasminogen activator receptor (uPAR) is associated with poor prognosis in oral squamous cell carcinoma (OSCC), and increased expression of uPAR is often found at the invasive tumour front. The aim of the current study was to elucidate the role of uPAR in invasion and metastasis of OSCC, and the effects of various tumour microenvironments in these processes. Furthermore, we wanted to study whether the cells’ expression level of uPAR affected the activity of gelatinolytic enzymes. Methods The Plaur gene was both overexpressed and knocked-down in the murine OSCC cell line AT84. Tongue and skin tumours were established in syngeneic mice, and cells were also studied in an ex vivo leiomyoma invasion model. Soluble factors derived from leiomyoma tissue, as well as purified extracellular matrix (ECM) proteins, were assessed for their ability to affect uPAR expression, glycosylation and cleavage. Activity of gelatinolytic enzymes in the tissues were assessed by in situ zymography. Results We found that increased levels of uPAR did not induce tumour invasion or metastasis. However, cells expressing low endogenous levels of uPAR in vitro up-regulated uPAR expression both in tongue, skin and leiomyoma tissue. Various ECM proteins had no effect on uPAR expression, while soluble factors originating from the leiomyoma tissue increased both the expression and glycosylation of uPAR, and possibly also affected the proteolytic processing of uPAR. Tumours with high levels of uPAR, as well as cells invading leiomyoma tissue with up-regulated uPAR expression, all displayed enhanced activity of gelatinolytic enzymes. Conclusions Although high levels of uPAR are not sufficient to induce invasion and metastasis, the activity of gelatinolytic enzymes was increased. Furthermore, several tumour microenvironments have the capacity to induce up-regulation of uPAR expression, and soluble factors in the tumour microenvironment may have an important role in the regulation of posttranslational modification of uPAR.
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Affiliation(s)
- Synnøve Magnussen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
- * E-mail:
| | - Elin Hadler-Olsen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Nadezhda Latysheva
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Emma Pirila
- Department of Diagnostics and Oral Medicine, Institute of Dentistry, University of Oulu, and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Sonja E. Steigen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
- Diagnostic Clinic - Department of Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Robert Hanes
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Tuula Salo
- Department of Diagnostics and Oral Medicine, Institute of Dentistry, University of Oulu, and Medical Research Center, Oulu University Hospital, Oulu, Finland
- Institute of Dentistry, University of Helsinki, Helsinki, Finland
| | - Jan-Olof Winberg
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Lars Uhlin-Hansen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
- Diagnostic Clinic - Department of Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Gunbjørg Svineng
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
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12
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Paolini F, Massa S, Manni I, Franconi R, Venuti A. Immunotherapy in new pre-clinical models of HPV-associated oral cancers. Hum Vaccin Immunother 2013; 9:534-43. [PMID: 23296123 DOI: 10.4161/hv.23232] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Cervical, anal, penile and a sub-set of head and neck (HN) tumors are critical health problems caused by high risk Human Papilloma Viruses (HPVs), like HPV type 16. No specific/effective pharmacological treatments exist. A valid preventive vaccination as well as the immunotherapy of persistent infections, pre-cancerous lesions or early-stage cancers could drive the HPV disease burden down. These treatments might be featured through low-cost platforms like those based on DNA and plant biotechnologies to produce tailored and enhanced formulations taking profit from the use of plants as bio-factories and as a source of immune-stimulators. Finally, and regardless of the formulation type, pre-clinical tests and models are crucial to foresee efficacy of immunotherapy before clinical trials. In this study, we created an orthotopic mouse model for HPV-related oral tumors, a subset of HN tumors for which no models have been generated before. The model was obtained by inducing the stable expression of the HPV16 E7 protein into the mouse oral squamous cell carcinoma (OSCC) AT-84 (AT-84 E7). The AT-84 E7 cells were injected into the mouth pavement of C3H mice via an extra-oral route to obtain orthotopic tumors. The model turned out to mimic the natural history of the human HPV oral cancer. From AT-84 E7, through engineering to express luciferase, the bioluminescent AT-84 E7-Luc cells were obtained for a fast and easy monitoring by imaging. The AT-84 E7 and the AT-84 E7-Luc tumors were used to test the efficacy of E7-based therapeutic vaccines that we had previously generated and that had been already proven to be active in mice against non-orthotopic E7-expressing tumors (TC-1 cells). In particular, we used genetic and plant-derived formulations based on attenuated HPV16 E7 variants either fused to plant virus genes with immunological activity or produced by tobacco plants. Mice were monitored by imaging allowing to test the size reduction of the mouth implanted experimental tumors in function of the different regimens used. The proposed tumor model is easy to handle and to reproduce and it is efficacious in monitoring immunotherapy. Furthermore, it is expected to be more predictive of clinical outcome of therapeutic vaccines than non-orthotopic models that are currently used. Finally, imaging offers unique opportunities to predict formulation efficacy through measuring tumor growth in vivo.
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Affiliation(s)
- Francesca Paolini
- Laboratory of Virology; Regina Elena National Cancer Institute; Rome, Italy
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13
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Chung JS, Kim S, Hwang YS, Zhang X, Cha IH. An orthotopic nude mouse model of tongue carcinoma. J Korean Assoc Oral Maxillofac Surg 2011. [DOI: 10.5125/jkaoms.2011.37.6.490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Jae-Seung Chung
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Korea
| | - Somi Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Korea
| | - Young-Sun Hwang
- Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
| | - Xianlan Zhang
- Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
| | - In-Ho Cha
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Korea
- Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
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14
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Chung IS, Son YI, Ko YJ, Baek CH, Cho JK, Jeong HS. Peritumor injections of purified tumstatin delay tumor growth and lymphatic metastasis in an orthotopic oral squamous cell carcinoma model. Oral Oncol 2008; 44:1118-26. [DOI: 10.1016/j.oraloncology.2008.01.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 01/09/2008] [Accepted: 01/09/2008] [Indexed: 10/22/2022]
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15
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Orthotopic animal models for oncologic photodynamic therapy and photodiagnosis. Photodiagnosis Photodyn Ther 2007; 4:230-6. [DOI: 10.1016/j.pdpdt.2007.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2007] [Revised: 09/19/2007] [Accepted: 09/26/2007] [Indexed: 02/08/2023]
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16
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Liu J, Xia X, Torrero M, Barrett R, Shillitoe EJ, Li S. The mechanism of exogenous B7.1-enhanced IL-12-mediated complete regression of tumors by a single electroporation delivery. Int J Cancer 2006; 119:2113-8. [PMID: 16823840 DOI: 10.1002/ijc.22100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Electroporation-based mono-gene therapy has received great interest in recent years but coadministration of different therapeutic genes for treatment of tumors has not been well explored. We hypothesize that electroporation is capable of delivering multiple genes that induce an additive or synergistic antitumor effect. To test this hypothesis, we used mice that were bearing SCCVII or TRAMP tumors. Established tumors with a diameter of 4-5 mm were injected with control plasmid DNA or plasmid DNA encoding B7.1, IL-12 or both via electroporation. Tumor regression, CTL activity and the level of B7.1, IL-12 and Stat1 expression were determined in both wild-type mice and in mice with a knock-out of the Stat1 gene. Remarkably, a single coadministration of the plasmids that encoded IL-12 and B7.1 eradicated tumors in 80% of mice. The therapeutic effect was associated with high levels of endogenous B7.1 expression, activity of cytotoxic lymphocytes, and activation of Stat1. Both exogenous B7.1 and IL-12 were required for inducing a high level of Stat1 activation in tumors, which occurred through a mechanism that was independent of the host Stat1. Both stimulators were also required for inducing the strong cytotoxic lymphocyte activity and for increasing the level and extending the duration of endogenous B7.1 expression. We therefore propose a 2-signal stimulation model to explain the synergistic effect of the coadministration of IL-12 and B7.1 on the regression of the tumors.
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Affiliation(s)
- Jianguo Liu
- Department of Comparative Biomedical Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
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17
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Mognetti B, Di Carlo F, Berta GN. Animal models in oral cancer research. Oral Oncol 2006; 42:448-60. [PMID: 16266822 DOI: 10.1016/j.oraloncology.2005.07.014] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Accepted: 07/29/2005] [Indexed: 12/11/2022]
Abstract
Biologically and clinically relevant animal models are essential in investigation of the progression of diseases and the elaboration of diagnostic or therapeutic protocols. The several rodent models used for in vivo evaluation for oral cancer employ chemical, transplantation and genetic (knockout and transgenic) induction methods. These models are described together with their advantages and disadvantages. Their optimization and application in future research may improve the early detection and treatment of oral cancer.
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Affiliation(s)
- B Mognetti
- Pharmacology Unit, Department of Biological and Clinical Science, University of Turin, Ospedale San Luigi, Orbassano (TO), Italy
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18
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Smith LP, Thomas GR. Animal models for the study of squamous cell carcinoma of the upper aerodigestive tract: a historical perspective with review of their utility and limitations. Part A. Chemically-induced de novo cancer, syngeneic animal models of HNSCC, animal models of transplanted xenogeneic human tumors. Int J Cancer 2006; 118:2111-22. [PMID: 16380986 DOI: 10.1002/ijc.21694] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Understanding the complex histological, genetic and molecular changes that lead to malignant transformation of squamous epithelia of the head and neck will likely guide the development of methods for improved diagnosis, monitoring and treatment of head and neck squamous cell carcinoma (HNSCC). The development and use of animal models that closely mimic the histopathology and molecular pathogenesis of HNSCC in humans would greatly expand the research possibilities and provide a means of testing potential therapeutic agents. However, many available animal models of HNSCC fall short of this objective. In order for investigators to select the appropriate model to answer scientific questions, it is important to understand the benefits and limitations of available animal models for the study of HNSCC. The purpose of this work is to give an overview of the most pertinent animal models of HNSCC, and to discuss future directions of research in this field.
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Affiliation(s)
- Lee P Smith
- Department of Otolaryngology, Head and Neck Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
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19
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Shillitoe EJ, Pellenz C. Factors That Limit the Effectiveness of Herpes Simplex Virus Type 1 for Treatment of Oral Cancer in Mice. Clin Cancer Res 2005; 11:3109-16. [PMID: 15837767 DOI: 10.1158/1078-0432.ccr-04-2302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although the growth of experimental oral cancers can be inhibited by infection with the herpes simplex virus type 1 (HSV-1), the effect is incomplete. To define factors that might limit the effectiveness of the virus, we examined the roles of the innate immune system and the replication status of the tumor cells. AT-84 tumors were induced in strains of mice that had specific immune defects and were treated with the virus. Explanted tumors and tumor cells in culture were also infected. No differences in viral replication or in the effect of virus on the tumor were seen between mice with a lack of T or B lymphocytes, natural killer cells, phagocytic spleen cells, or complement. The virus did not replicate significantly more in tumors that were maintained as explants. Immediately after recovery of cells from a tumor the proportion of cells in the S phase was around 18%, and replication of virus in those cells was very limited. After 3 weeks in culture, the proportion in S had increased to 50% and both the recovery of virus from the cells and the toxic effect of the virus on the cells had increased significantly. The innate immune system thus seemed to have a minimal effect on replication of HSV-1 when used as an oncolytic virus for oral cancers in mice. Instead, the fraction of cells in the S phase was important. Because human oral cancers, like mouse tumors, have a low fraction of cells in the S phase, it is likely that the in vivo use of HSV-1 as cancer therapy will be limited by the replication of the virus.
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Affiliation(s)
- Edward J Shillitoe
- Department of Microbiology and Immunology, SUNY College of Medicine, Syracuse, New York 13210, USA.
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