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Costa CSDO, Mafra RP, Rolim LSA, Souza LBD, Pinto LP. Immunohistochemical study of the plasminogen activator system in benign epithelial odontogenic lesions. Braz Oral Res 2022; 36:e071. [PMID: 36507758 DOI: 10.1590/1807-3107bor-2022.vol36.0071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 03/03/2022] [Indexed: 12/15/2022] Open
Abstract
The aim of this study was to analyze and compare the immunohistochemical expression of plasminogen activator system (PAS) proteins (uPA, uPAR, and PAI-1) in ameloblastomas (AMBs), odontogenic keratocysts (OKCs), and dental follicles (DFs) representing normal odontogenic tissue, as well as to investigate possible correlations between these proteins. Twenty AMBs, 20 OKCs, and 10 DFs were selected for immunohistochemical analysis. In each case, the immunoexpression of uPA, uPAR, and PAI-1 was evaluated semiquantitatively based on the percentage of positivity in odontogenic epithelial and connective tissue cells. The epithelial immunoexpression of uPA was significantly lower in AMBs when compared to OKCs (p = 0.001) and DFs (p = 0.029). Significantly higher epithelial immunostaining for uPAR was observed in AMBs when compared to OKCs (p < 0.001). There were no significant differences in the epithelial immunoexpression of PAI-1 between AMBs and OKCs (p = 1.000). The correlations found for the expression of the studied proteins were not statistically significant (p > 0.05). However, the epithelial and connective tissue expressions of uPAR have a strong positive and statistically significant correlation in AMBs. The present results suggest that uPA is involved in the pathogenesis of OKCs and that uPAR may participate in tumorigenesis in AMBs. The high percentage of PAI-1-positive cells suggests a possible role for this protein in the development of AMBs and OKCs. Furthermore, the studied proteins do not seem to act synergistically in AMBs, OKCs, and DFs.
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Affiliation(s)
- Carla Samily de Oliveira Costa
- Universidade Federal do Rio Grande do Norte - UFRN, School of Dentistry, Department of Oral Pathology, Natal, RN, Brazil
| | - Rodrigo Porpino Mafra
- Universidade Federal do Rio Grande do Norte - UFRN, School of Dentistry, Department of Oral Pathology, Natal, RN, Brazil
| | - Larissa Santos Amaral Rolim
- Universidade Federal do Rio Grande do Norte - UFRN, School of Dentistry, Department of Oral Pathology, Natal, RN, Brazil
| | - Lélia Batista de Souza
- Universidade Federal do Rio Grande do Norte - UFRN, School of Dentistry, Department of Oral Pathology, Natal, RN, Brazil
| | - Leão Pereira Pinto
- Universidade Federal do Rio Grande do Norte - UFRN, School of Dentistry, Department of Oral Pathology, Natal, RN, Brazil
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2
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Long J, Zhang S, Zeng X, Ouyang Y, Wang Y, Hu Z, Ye Y, Wu W, Jin F, Zhou S, Zeng Z. Development of an Immunogenomic Landscape-Based Prognostic Index of Head and Neck Squamous Cell Carcinoma. Front Mol Biosci 2020; 7:586344. [PMID: 33330624 PMCID: PMC7732611 DOI: 10.3389/fmolb.2020.586344] [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: 08/13/2020] [Accepted: 10/13/2020] [Indexed: 12/11/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the eighth leading cancer by incidence worldwide, with approximately 700,000 new cases in 2018 (accounting for 11% of all cancers). The occurrence and development of tumors are closely related to the immunological function of the body and sensitivity to treatment schemes as well as prognosis. It is urgent for clinicians to systematically study patients’ immune gene maps to help select a treatment plan and analyze the potential to cure HNSCC. Here, the transcriptomic data of HNSCC samples were downloaded from The Cancer Genome Atlas (TCGA), and 4,793 genes differentially expressed in normal and cancer tissues of HNSCC were identified, including 1,182 downregulated and 3,611 upregulated genes. From these genes, 400 differentially expressed immune-related genes (IRGs) were extracted, including 95 downregulated genes and 305 upregulated genes. The prognostic values of IRGs were evaluated by univariate Cox analysis, and 236 genes that were significantly related to the overall survival (OS) of patients were identified. The signaling pathways that play roles in the prognosis of IRGs were investigated by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses, and the expression profiles of IRGs and OS in 499 HNSCC patients based on TCGA dataset were integrated. Potential molecular mechanisms and characteristics of these HNSCC-specific IRGs were further explored with the help of a new prognostic index based on IRGs developed by least absolute shrinkage and selection operator (LASSO) Cox analysis. A total of 64 hub genes (IRGs associated with prognosis) were markedly associated with the clinical outcome of HNSCC patients. KEGG functional enrichment analysis revealed that these genes were actively involved in several pathways, e.g., cytokine–cytokine receptor interaction, T-cell receptor signaling, and natural killer cell-mediated cytotoxicity. IRG-based prognostic signatures performed moderately in prognostic predictions. Interestingly, the prognostic index based on IRGs reflected infiltration by several types of immune cells. These data screened several IRGs of clinical significance and revealed drivers of the immune repertoire, demonstrating the importance of a personalized IRG-based immune signature in the recognition, surveillance, and prognosis of HNSCC.
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Affiliation(s)
- Jinhua Long
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Department of Head and Neck Oncology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Shichao Zhang
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Key Laboratory of Biology and Medical Engineering, Immune Cells and Antibody Engineering Research Center of Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, China
| | - Xianlin Zeng
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Key Laboratory of Biology and Medical Engineering, Immune Cells and Antibody Engineering Research Center of Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, China
| | - Yan Ouyang
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China
| | - Yun Wang
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Key Laboratory of Biology and Medical Engineering, Immune Cells and Antibody Engineering Research Center of Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, China
| | - Zuquan Hu
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Key Laboratory of Biology and Medical Engineering, Immune Cells and Antibody Engineering Research Center of Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, China
| | - Yuannong Ye
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Weili Wu
- Department of Head and Neck Oncology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Feng Jin
- Department of Head and Neck Oncology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Shi Zhou
- Department of Intervention, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Zhu Zeng
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,School of Biology and Engineering, Guizhou Medical University, Guiyang, China.,Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, Guizhou Medical University, Guiyang, China.,Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China
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3
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Nephronectin promotes breast cancer brain metastatic colonization via its integrin-binding domains. Sci Rep 2020; 10:12237. [PMID: 32699247 PMCID: PMC7376038 DOI: 10.1038/s41598-020-69242-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/07/2020] [Indexed: 12/18/2022] Open
Abstract
This study demonstrates a role for the extracellular matrix protein nephronectin (NPNT) in promoting experimental breast cancer brain metastasis, possibly through enhanced binding to- and migration through brain endothelial cells. With the introduction of more targeted breast cancer treatments, a prolonged survival has resulted during the last decade. Consequently, an increased number of patients develop metastasis in the brain, a challenging organ to treat. We recently reported that NPNT was highly expressed in primary breast cancer and associated with unfavourable prognosis. The current study addresses our hypothesis that NPNT promotes brain metastases through its integrin-binding motifs. SAGE-sequencing revealed that NPNT was significantly up-regulated in human breast cancer tissue compared to pair-matched normal breast tissue. Human brain metastatic breast cancers expressed both NPNT and its receptor, integrin α8β1. Using an open access repository; BreastMark, we found a correlation between high NPNT mRNA levels and poor prognosis for patients with the luminal B subtype. The 66cl4 mouse cell line was used for expression of wild-type and mutant NPNT, which is unable to bind α8β1. Using an in vivo model of brain metastatic colonization, 66cl4-NPNT cells showed an increased ability to form metastatic lesions compared to cells with mutant NPNT, possibly through reduced endothelial adhesion and transmigration.
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De Vincenzo A, Belli S, Franco P, Telesca M, Iaccarino I, Botti G, Carriero MV, Ranson M, Stoppelli MP. Paracrine recruitment and activation of fibroblasts by c-Myc expressing breast epithelial cells through the IGFs/IGF-1R axis. Int J Cancer 2019; 145:2827-2839. [PMID: 31381136 DOI: 10.1002/ijc.32613] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 06/26/2019] [Accepted: 07/30/2019] [Indexed: 12/21/2022]
Abstract
Fibroblasts are among the most abundant stromal cells in the tumor microenvironment (TME), progressively differentiating into activated, motile, myofibroblast-like, protumorigenic cells referred to as Cancer-Associated Fibroblasts (CAFs). To investigate the mechanisms by which epithelial cells direct this transition, the early stages of tumorigenesis were exemplified by indirect cocultures of WI-38 or human primary breast cancer fibroblasts with human mammary epithelial cells expressing an inducible c-Myc oncogene (MCF10A-MycER). After c-Myc activation, the conditioned medium (CM) of MCF10A-MycER cells significantly enhanced fibroblast activation and mobilization. As this was accompanied by decreased insulin-like growth factor binding protein-6 (IGFBP-6) and increased insulin-like growth factor-1 and IGF-II (IGF-I, IGF-II) in the CM, IGFs were investigated as key chemotactic factors. Silencing IGFBP-6 or IGF-I or IGF-II expression in epithelial cells or blocking Insulin-like growth factor 1 receptor (IGF-1R) activity on fibroblasts significantly altered fibroblast mobilization. Exposure of WI-38 fibroblasts to CM from induced MCF10A-MycER cells or to IGF-II upregulated FAK phosphorylation on Tyr397 , as well as the expression of α-smooth muscle actin (α-SMA), features associated with CAF phenotype and increased cell migratory/invasive behavior. In three-dimensional (3D)-organotypic assays, WI-38 or human primary fibroblasts, preactivated with either CM from MCF10A-MycER cells or IGFs, resulted in a permissive TME that enabled nontransformed MCF10A matrix invasion. This effect was abolished by inhibiting IGF-1R activity. Thus, breast epithelial cell oncogenic activation and stromal fibroblast transition to CAFs are linked through the IGFs/IGF-1R axis, which directly promotes TME remodeling and increases tumor invasion.
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Affiliation(s)
- Anna De Vincenzo
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy
| | - Stefania Belli
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy
| | - Paola Franco
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy
| | - Marialucia Telesca
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy
| | - Ingram Iaccarino
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy.,Hematopathology Section, University Hospital Schleswig-Holstein Campus Kiel, Christian-Albrechts University, Kiel, Germany
| | - Gerardo Botti
- Pathology Unit, IRCCS National Cancer Institute "Fondazione G. Pascale", Naples, Italy
| | - Maria V Carriero
- Department of Experimental Oncology, IRCCS National Cancer Institute "Fondazione G. Pascale", Naples, Italy
| | - Marie Ranson
- Illawarra Health and Medical Research Institute, Wollongong, NSW, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, Australia
| | - Maria Patrizia Stoppelli
- Institute of Genetics and Biophysics "Adriano Buzzati Traverso", National Research Council, Naples, Italy
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5
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The uPAR System as a Potential Therapeutic Target in the Diseased Eye. Cells 2019; 8:cells8080925. [PMID: 31426601 PMCID: PMC6721659 DOI: 10.3390/cells8080925] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/07/2019] [Accepted: 08/17/2019] [Indexed: 12/15/2022] Open
Abstract
Dysregulation of vascular networks is characteristic of eye diseases associated with retinal cell degeneration and visual loss. Visual impairment is also the consequence of photoreceptor degeneration in inherited eye diseases with a major inflammatory component, but without angiogenic profile. Among the pathways with high impact on vascular/degenerative diseases of the eye, a central role is played by a system formed by the ligand urokinase-type plasminogen activator (uPA) and its receptor uPAR. The uPAR system, although extensively investigated in tumors, still remains a key issue in vascular diseases of the eye and even less studied in inherited retinal pathologies such as retinitis pigmantosa (RP). Its spectrum of action has been extended far beyond a classical pro-angiogenic function and has emerged as a central actor in inflammation. Preclinical studies in more prevalent eye diseases characterized by neovascular formation, as in retinopathy of prematurity, wet macular degeneration and rubeosis iridis or vasopermeability excess as in diabetic retinopathy, suggest a critical role of increased uPAR signaling indicating the potentiality of its modulation to counteract neovessel formation and microvascular dysfunction. The additional observation that the uPAR system plays a major role in RP by limiting the inflammatory cascade triggered by rod degeneration rises further questions about its role in the diseased eye.
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Salo T, Dourado MR, Sundquist E, Apu EH, Alahuhta I, Tuomainen K, Vasara J, Al-Samadi A. Organotypic three-dimensional assays based on human leiomyoma-derived matrices. Philos Trans R Soc Lond B Biol Sci 2018; 373:rstb.2016.0482. [PMID: 29158312 PMCID: PMC5717437 DOI: 10.1098/rstb.2016.0482] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2017] [Indexed: 12/19/2022] Open
Abstract
Alongside cancer cells, tumours exhibit a complex stroma containing a repertoire of cells, matrix molecules and soluble factors that actively crosstalk between each other. Recognition of this multifaceted concept of the tumour microenvironment (TME) calls for authentic TME mimetics to study cancer in vitro. Traditionally, tumourigenesis has been investigated in non-human, three-dimensional rat type I collagen containing organotypic discs or by means of mouse sarcoma-derived gel, such as Matrigel®. However, the molecular compositions of these simplified assays do not properly simulate human TME. Here, we review the main properties and benefits of using human leiomyoma discs and their matrix Myogel for in vitro assays. Myoma discs are practical for investigating the invasion of cancer cells, as are cocultures of cancer and stromal cells in a stiff, hypoxic TME mimetic. Myoma discs contain soluble factors and matrix molecules commonly present in neoplastic stroma. In Transwell, IncuCyte, spheroid and sandwich assays, cancer cells move faster and form larger colonies in Myogel than in Matrigel®. Additionally, Myogel can replace Matrigel® in hanging-drop and tube-formation assays. Myogel also suits three-dimensional drug testing and extracellular vesicle interactions. To conclude, we describe the application of our myoma-derived matrices in 3D in vitro cancer assays. This article is part of the discussion meeting issue ‘Extracellular vesicles and the tumour microenvironment’.
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Affiliation(s)
- Tuula Salo
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu 90014, Finland .,Medical Research Centre, Oulu University Hospital, Oulu, Finland.,Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki 0014, Finland.,Helsinki University Hospital, Helsinki 0014, Finland.,Department of Oral Diagnosis, Oral Pathology Division, Piracicaba Dental School, University of Campinas, Campinas 13414-903, Brazil
| | - Mauricio Rocha Dourado
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu 90014, Finland.,Medical Research Centre, Oulu University Hospital, Oulu, Finland.,Department of Oral Diagnosis, Oral Pathology Division, Piracicaba Dental School, University of Campinas, Campinas 13414-903, Brazil
| | - Elias Sundquist
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu 90014, Finland.,Medical Research Centre, Oulu University Hospital, Oulu, Finland
| | - Ehsanul Hoque Apu
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu 90014, Finland.,Medical Research Centre, Oulu University Hospital, Oulu, Finland
| | - Ilkka Alahuhta
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu 90014, Finland.,Medical Research Centre, Oulu University Hospital, Oulu, Finland
| | - Katja Tuomainen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki 0014, Finland
| | - Jenni Vasara
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki 0014, Finland
| | - Ahmed Al-Samadi
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki 0014, Finland
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7
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Keasey MP, Jia C, Pimentel LF, Sante RR, Lovins C, Hagg T. Blood vitronectin is a major activator of LIF and IL-6 in the brain through integrin-FAK and uPAR signaling. J Cell Sci 2018; 131:jcs.202580. [PMID: 29222114 DOI: 10.1242/jcs.202580] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 12/06/2017] [Indexed: 12/18/2022] Open
Abstract
We defined how blood-derived vitronectin (VTN) rapidly and potently activates leukemia inhibitory factor (LIF) and pro-inflammatory interleukin 6 (IL-6) in vitro and after vascular injury in the brain. Treatment with VTN (but not fibrinogen, fibronectin, laminin-111 or collagen-I) substantially increased LIF and IL-6 within 4 h in C6-astroglioma cells, while VTN-/- mouse plasma was less effective than that from wild-type mice. LIF and IL-6 were induced by intracerebral injection of recombinant human (rh)VTN in mice, but induction seen upon intracerebral hemorrhage was less in VTN-/- mice than in wild-type littermates. In vitro, VTN effects were inhibited by RGD, αvβ3 and αvβ5 integrin-blocking peptides and antibodies. VTN activated focal adhesion kinase (FAK; also known as PTK2), whereas pharmacological- or siRNA-mediated inhibition of FAK, but not PYK2, reduced the expression of LIF and IL-6 in C6 and endothelial cells and after traumatic cell injury. Dominant-negative FAK (Y397F) reduced the amount of injury-induced LIF and IL-6. Pharmacological inhibition or knockdown of uPAR (also known as PLAUR), which binds VTN, also reduced cytokine expression, possibly through a common target of uPAR and integrins. We propose that VTN leakage into tissues promotes inflammation. Integrin-FAK signaling is therefore a novel IL-6 and LIF regulation mechanism relevant to the inflammation and stem cell fields.
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Affiliation(s)
- Matthew P Keasey
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Cuihong Jia
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Lylyan F Pimentel
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA.,Keizo Asami Laboratory (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brasil
| | - Richard R Sante
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Chiharu Lovins
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Theo Hagg
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
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8
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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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9
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Shou LH, Cao D, Dong XH, Fang Q, Xu BL, Fei JP. Bone Marrow Urokinase Plasminogen Activator Receptor Levels are Associated with the Progress of Multiple Myeloma. ACTA ACUST UNITED AC 2016; 31:155-160. [DOI: 10.1016/s1001-9294(16)30044-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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