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Matarrese P, Abbruzzese C, Mileo AM, Vona R, Ascione B, Visca P, Rollo F, Benevolo M, Malorni W, Paggi MG. Interaction between the human papillomavirus 16 E7 oncoprotein and gelsolin ignites cancer cell motility and invasiveness. Oncotarget 2018; 7:50972-50985. [PMID: 27072581 PMCID: PMC5239452 DOI: 10.18632/oncotarget.8646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 03/28/2016] [Indexed: 11/25/2022] Open
Abstract
The viral oncoprotein E7 from the “high-risk” Human Papillomavirus 16 (HPV16) strain is able, when expressed in human keratinocytes, to physically interact with the actin severing protein gelsolin (GSN). In a previous work it has been suggested that this protein-protein interaction can hinder GSN severing function, thus leading to actin network remodeling. In the present work we investigated the possible implications of this molecular interaction in cancer cell metastatic potential by analyzing two different human CC cell lines characterized by low or high expression levels of HPV16 DNA (SiHa and CaSki, respectively). In addition, a HPV-null CC cell line (C-33A), transfected in order to express the HPV16 E7 oncoprotein as well as two different deletion mutants, was also analyzed. We found that HPV16 E7 expression level was directly related with cervical cancer migration and invasion capabilities and that these HPV16 E7-related features were associated with Epithelial to Mesenchymal Transition (EMT) processes. These effects appeared as strictly attributable to the physical interaction of HPV16 E7 with GSN, since HPV16 E7 deletion mutants unable to bind to GSN were also unable to modify microfilament assembly dynamics and, therefore, cell movements and invasiveness. Altogether, these data profile the importance of the physical interaction between HPV16 E7 and GSN in the acquisition of the metastatic phenotype by CC cells, underscoring the role of HPV16 intracellular load as a risk factor in cancer.
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Affiliation(s)
- Paola Matarrese
- Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, Rome, Italy
| | - Claudia Abbruzzese
- Department of Research, Advanced Diagnostics and Technological Innovation, Unit of Cellular Networks and Therapeutic Targets, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
| | - Anna Maria Mileo
- Department of Research, Advanced Diagnostics and Technological Innovation, Unit of Immunology and Immunotherapy, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
| | - Rosa Vona
- Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, Rome, Italy
| | - Barbara Ascione
- Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, Rome, Italy
| | - Paolo Visca
- Unit of Pathology, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
| | - Francesca Rollo
- Unit of Pathology, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
| | - Maria Benevolo
- Unit of Pathology, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
| | - Walter Malorni
- Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, Rome, Italy.,Istituto San Raffaele Pisana, Rome, Italy
| | - Marco G Paggi
- Department of Research, Advanced Diagnostics and Technological Innovation, Unit of Cellular Networks and Therapeutic Targets, Regina Elena National Cancer Institute, IRCCS, Rome, Italy
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Zwierzina ME, Ejaz A, Bitsche M, Blumer MJF, Mitterberger MC, Mattesich M, Amann A, Kaiser A, Pechriggl EJ, Hörl S, Rostek U, Pierer G, Fritsch H, Zwerschke W. Characterization of DLK1(PREF1)+/CD34+ cells in vascular stroma of human white adipose tissue. Stem Cell Res 2015; 15:403-18. [PMID: 26342195 DOI: 10.1016/j.scr.2015.08.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 08/07/2015] [Accepted: 08/13/2015] [Indexed: 02/07/2023] Open
Abstract
Sorting of native (unpermeabilized) SVF-cells from human subcutaneous (s)WAT for cell surface staining (cs) of DLK1 and CD34 identified three main populations: ~10% stained cs-DLK1+/cs-CD34-, ~20% cs-DLK1+/cs-CD34+dim and ~45% cs-DLK1-/cs-CD34+. FACS analysis after permeabilization showed that all these cells stained positive for intracellular DLK1, while CD34 was undetectable in cs-DLK1+/cs-CD34- cells. Permeabilized cs-DLK1-/cs-CD34+ cells were positive for the pericyte marker α-SMA and the mesenchymal markers CD90 and CD105, albeit CD105 staining was dim (cs-DLK1-/cs-CD34+/CD90+/CD105+dim/α-SMA+/CD45-/CD31-). Only these cells showed proliferative and adipogenic capacity. Cs-DLK1+/cs-CD34- and cs-DLK1+/cs-CD34+dim cells were also α-SMA+ but expressed CD31, had a mixed hematopoietic and mesenchymal phenotype, and could neither proliferate nor differentiate into adipocytes. Histological analysis of sWAT detected DLK1+/CD34+ and DLK1+/CD90+ cells mainly in the outer ring of vessel-associated stroma and at capillaries. DLK1+/α-SMA+ cells were localized in the CD34- perivascular ring and in adventitial vascular stroma. All these DLK1+ cells possess a spindle-shaped morphology with extremely long processes. DLK1+/CD34+ cells were also detected in vessel endothelium. Additionally, we show that sWAT contains significantly more DLK1+ cells than visceral (v)WAT. We conclude that sWAT has more DKL1+ cells than vWAT and contains different DLK1/CD34 populations, and only cs-DLK1-/cs-CD34+/CD90+/CD105+dim/α-SMA+/CD45-/CD31- cells in the adventitial vascular stroma exhibit proliferative and adipogenic capacity.
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Affiliation(s)
- Marit E Zwierzina
- Division for Clinical and Functional Anatomy, Department for Anatomy, Histology and Embryology, Medical University of Innsbruck, Austria
| | - Asim Ejaz
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria
| | - Mario Bitsche
- Division for Clinical and Functional Anatomy, Department for Anatomy, Histology and Embryology, Medical University of Innsbruck, Austria
| | - Michael J F Blumer
- Division for Clinical and Functional Anatomy, Department for Anatomy, Histology and Embryology, Medical University of Innsbruck, Austria
| | - Maria C Mitterberger
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria
| | - Monika Mattesich
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Austria
| | - Arno Amann
- Department of Internal Medicine V, Medical University of Innsbruck, Austria
| | - Andreas Kaiser
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria
| | - Elisabeth J Pechriggl
- Division for Clinical and Functional Anatomy, Department for Anatomy, Histology and Embryology, Medical University of Innsbruck, Austria
| | - Susanne Hörl
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria
| | - Ursula Rostek
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria
| | - Gerhard Pierer
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Austria
| | - Helga Fritsch
- Division for Clinical and Functional Anatomy, Department for Anatomy, Histology and Embryology, Medical University of Innsbruck, Austria
| | - Werner Zwerschke
- Cell Metabolism and Differentiation Research Group, Institute for Biomedical Aging Research, University of Innsbruck, Austria.
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