|
1
|
Ekhtiari S, Chiba K, Popovic S, Crowther R, Wohl G, Kin On Wong A, Tanke DH, Dufault DM, Geen OD, Parasu N, Crowther MA, Evans DC. First case of osteosarcoma in a dinosaur: a multimodal diagnosis. Lancet Oncol 2020; 21:1021-1022. [PMID: 32758461 DOI: 10.1016/s1470-2045(20)30171-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/04/2020] [Accepted: 03/09/2020] [Indexed: 11/17/2022]
Affiliation(s)
- Seper Ekhtiari
- Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - Kentaro Chiba
- Department of Biosphere-Geosphere Science, Okayama University of Science, Okayama, Japan
| | - Snezana Popovic
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Rhianne Crowther
- Department of Biology, Trent University, Peterborough, ON, Canada
| | - Gregory Wohl
- Department of Mechanical Engineering, McMaster University, Hamilton, ON, Canada
| | - Andy Kin On Wong
- Joint Department of Medical Imaging, University Health Network, Toronto, ON, Canada
| | - Darren H Tanke
- Royal Tyrrell Museum of Palaeontology, Drumheller, AB, Canada
| | | | - Olivia D Geen
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Naveen Parasu
- Department of Radiology, McMaster University, Hamilton, ON, Canada
| | - Mark A Crowther
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | |
Collapse
|
|
2
|
Abdulkhalek S, Geen OD, Brodhagen L, Haxho F, Alghamdi F, Allison S, Simmons DJ, O'Shea LK, Neufeld RJ, Szewczuk MR. Transcriptional factor snail controls tumor neovascularization, growth and metastasis in mouse model of human ovarian carcinoma. Clin Transl Med 2014; 3:28. [PMID: 26932374 PMCID: PMC4884043 DOI: 10.1186/s40169-014-0028-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Accepted: 07/24/2014] [Indexed: 12/16/2022] Open
Abstract
Background Snail, a transcriptional factor and repressor of E-cadherin is well known for its role in cellular invasion. It can regulate epithelial to mesenchymal transition (EMT) during embryonic development and in epithelial cells. Snail also mediates tumor progression and metastases. Silencing of Snail and its associate member Slug in human A2780 ovarian epithelial carcinoma cell line was investigated to identify its role in tumor neovascularization. Methods Live cell sialidase, WST-1 cell viability and immunohistochemistry assays were used to evaluate sialidase activity, cell survival and the expression levels of tumor E-cadherin, N-cadherin, VE-cadherin, and host endothelial CD31+(PECAM-1) cells in archived paraffin-embedded ovarian A2780, A2780 Snail shRNA GIPZ lentiviral knockdown (KD) and A2780 Slug shRNA GIPZ lentiviral KD tumors grown in RAGxCγ double mutant mice. Results Oseltamivir phosphate (OP), anti-Neu1 antibodies and MMP-9 specific inhibitor blocked Neu1 activity associated with epidermal growth factor (EGF) stimulated A2780 ovarian epithelial carcinoma cells. Silencing Snail in A2780 cells abrogated the Neu1 activity following EGF stimulation of the cells compared to A2780 and A2780 Slug KD cells. OP treatment of A2780 and cisplatin-resistant A2780cis cells reproducibly and dose-dependently abated the cell viability with a LD50 of 7 and 4 μm, respectively, after 48 h of incubation. Heterotopic xenografts of A2780 and A2780 Slug KD tumors developed robust and bloody tumor vascularization in RAG2xCγ double mutant mice. OP treatment at 50 mg/kg daily intraperitoneally did not significantly impede A2780 tumor growth rate but did cause a significant reduction of lung metastases compared with the untreated and OP 30mg/kg cohorts. Silencing Snail in A2780 tumor cells completely abrogated tumor vascularization, tumor growth and spread to the lungs in RAGxCγ double mutant mice. A2780 and A2780 Slug KD tumors expressed high levels of human N- and VE-cadherins, and host CD31+ endothelial cells, while A2780 Snail KD tumors expressed E-cadherin and reduced host CD31+ cells. OP 50mg/kg cohort tumors had reduced numbers of host CD31+ cells compared to a higher expression levels of CD31+ cells in tumors from the untreated control and OP 30mg/kg cohorts. Conclusion Snail transcriptional factor is an important intermediate player in human ovarian tumor neovascularization. Electronic supplementary material The online version of this article (doi:10.1186/s40169-014-0028-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Samar Abdulkhalek
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada. .,Present address: Department of Molecular Genetics, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.
| | - Olivia D Geen
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Lacey Brodhagen
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Fiona Haxho
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Farah Alghamdi
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada. .,Present address: The King Fahd Armed Forces Hospital, Serology, Jeddah, Saudi Arabia.
| | - Stephanie Allison
- Chemical Engineering, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Duncan J Simmons
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Leah K O'Shea
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada. .,Present address: Mississauga Academy of Medicine, University of Toronto Mississauga, North Terrence Donnelly Health Sciences Complex, Mississauga, L5L 1C6, ON, Canada.
| | - Ronald J Neufeld
- Chemical Engineering, Queen's University, Kingston, K7L 3N6, ON, Canada.
| | - Myron R Szewczuk
- Departments of Biomedical and Molecular Sciences, Queen's University, Kingston, K7L 3N6, ON, Canada.
| |
Collapse
|