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Dubuc V, Laverty S, Richard H, Doré M, Theoret C. Development of a computer-based quantification method for immunohistochemically-stained tissues and its application to study mast cells in equine wound healing (proof of concept). BMC Vet Res 2020; 16:228. [PMID: 32616050 PMCID: PMC7330934 DOI: 10.1186/s12917-020-02444-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 06/23/2020] [Indexed: 12/13/2022] Open
Abstract
Background There is a growing interest in the scientific community to use computer-based software programs for the quantification of cells during physiological and pathophysiological processes. Drawbacks of computer-based methods currently used to quantify immunohistochemical staining are the complexity of use, expense of software and overly-simplified descriptions of protocol thereby limiting reproducibility. The precise role of mast cells in equine cutaneous wound healing is unknown. Given the contribution of mast cells to the chronic inflammation observed in human keloid, a pathology similar to exuberant granulation tissue (EGT) in horses, mast cells might be present in high numbers in equine limb wounds predisposed to EGT. The main goal of this study was to develop a reliable and reproducible quantification method for immunostained tissues using a computer software that is widely available, at no cost, to the scientific community. A secondary goal was to conduct a proof of concept using the newly-established method to quantify mast cells during wound healing at different anatomical sites (body and limb) in horses to see if a different pattern is observed in limb wounds, which are predisposed to EGT. Results A good intraclass correlation coefficient (ICC, 0.67 p < 0.05) was found between the computer-based ImageJ method and manual counting. An excellent intra-operator ICC of 0.90 (p < 0.01) was found for the ImageJ quantification method while a good interoperator ICC of 0.69 (p < 0.01) was measured. No significant difference was observed between the variation of the ImageJ and that of the manual counting method. Mast cells were localized below the epidermis, around cutaneous appendages and blood vessels. Mast cell numbers did not differ significantly in relation to anatomical location or time of healing. Conclusions The computer-based quantification method developed is reliable, reproducible, available, cost-free and could be used to study different physiological and pathological processes using immunohistochemistry.
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Affiliation(s)
- Valérie Dubuc
- Department of Veterinary Biomedicine, Faculté de Médecine Vétérinaire, Université de Montréal, 3 200 Sicotte, Saint-Hyacinthe, Québec, Canada.
| | - Sheila Laverty
- Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, 1 500 des Vétérinaires, Saint-Hyacinthe, Québec, Canada
| | - Hélène Richard
- Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, 1 500 des Vétérinaires, Saint-Hyacinthe, Québec, Canada
| | - Monique Doré
- Department of Pathology and Microbiology, Faculté de Médecine Vétérinaire, Université de Montréal, 3 200 Sicotte, Saint-Hyacinthe, Québec, Canada
| | - Christine Theoret
- Department of Veterinary Biomedicine, Faculté de Médecine Vétérinaire, Université de Montréal, 3 200 Sicotte, Saint-Hyacinthe, Québec, Canada
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Sulce M, Marconato L, Martano M, Iussich S, Dentini A, Melega M, Miniscalco B, Riondato F. Utility of flow cytometry in canine primary cutaneous and matched nodal mast cell tumor. Vet J 2018; 242:15-23. [DOI: 10.1016/j.tvjl.2018.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 08/31/2018] [Accepted: 10/09/2018] [Indexed: 02/01/2023]
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Lavergne SN. In Vitro Research Tools in the Field of Human Immediate Drug Hypersensitivity and Their Present Use in Small Animal Veterinary Medicine. Vet Sci 2016; 4:E1. [PMID: 29056660 PMCID: PMC5606612 DOI: 10.3390/vetsci4010001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/23/2016] [Accepted: 12/13/2016] [Indexed: 12/18/2022] Open
Abstract
Drug hypersensitivity reactions (DHR) are immune-mediated idiosyncratic adverse drug events. Type I DHR are often referred to as "immediate" and involve B lymphocyte-secreted IgE that bind to the membrane of basophils and mast cells, inducing their degranulation. This review presents various in vitro tests that were developed in the field of human type I HS and implemented as clinical diagnostic tools in human cases of immediate DHR. The respective strengths and weaknesses of each test will be discussed in parallel of validation data such as specificity and sensitivity whenever available. Some of them have also been used as diagnostic tools in veterinary medicine, but not in cases of immediate DHR. Most of these diagnostic tools can be categorized into humoral and cellular tests. The former tests measure serum concentrations of factors, such as histamine, tryptase, and drug-specific IgE. The latter assays quantify markers of drug-induced basophil activation or drug-specific lymphocyte proliferation. Pharmacogenetic markers have also been investigated in immediate DHR, but not as extensively as in non-immediate ones. Throughout, practical aspects and limitations of the tests, as well as sensitivity and specificity parameters, will be presented. In addition, the experience of veterinary medicine with these diagnostic tools will be summarized. However, to date, none of them has ever been reported in a veterinary case of type I DHR.
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Affiliation(s)
- Sidonie N. Lavergne
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois-Urbana-Champaign, 2001 South Lincoln Av, Urbana, IL 61802, USA.
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Ressel L, Finotello R. Lymph node histology for the assessment of residual neoplastic disease in canine mast cell tumours: does the presence of metachromatic granules always identify mast cells? Vet Comp Oncol 2016; 15:1119-1121. [DOI: 10.1111/vco.12278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 09/20/2016] [Indexed: 11/29/2022]
Affiliation(s)
- L. Ressel
- Section of Veterinary Pathology, Institute of Veterinary Science; University of Liverpool; Liverpool UK
| | - R. Finotello
- Small Animal Teaching Hospital, Institute of Veterinary Science; University of Liverpool; Liverpool UK
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Hwang CC, Umeki S, Kubo M, Hayashi T, Shimoda H, Mochizuki M, Maeda K, Baba K, Hiraoka H, Coffey M, Okuda M, Mizuno T. Oncolytic reovirus in canine mast cell tumor. PLoS One 2013; 8:e73555. [PMID: 24073198 PMCID: PMC3779226 DOI: 10.1371/journal.pone.0073555] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 07/21/2013] [Indexed: 02/07/2023] Open
Abstract
The usage of reovirus has reached phase II and III clinical trials in human cancers. However, this is the first study to report the oncolytic effects of reovirus in veterinary oncology, focusing on canine mast cell tumor (MCT), the most common cutaneous tumor in dogs. As human and canine cancers share many similarities, we hypothesized that the oncolytic effects of reovirus can be exploited in canine cancers. The objective of this study was to determine the oncolytic effects of reovirus in canine MCT in vitro, in vivo and ex vivo. We demonstrated that MCT cell lines were highly susceptible to reovirus as indicated by marked cell death, high production of progeny virus and virus replication. Reovirus induced apoptosis in the canine MCT cell lines with no correlation to their Ras activation status. In vivo studies were conducted using unilateral and bilateral subcutaneous MCT xenograft models with a single intratumoral reovirus treatment and apparent reduction of tumor mass was exhibited. Furthermore, cell death was induced by reovirus in primary canine MCT samples in vitro. However, canine and murine bone marrow-derived mast cells (BMCMC) were also susceptible to reovirus. The combination of these results supports the potential value of reovirus as a therapy in canine MCT but warrants further investigation on the determinants of reovirus susceptibility.
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Affiliation(s)
- Chung Chew Hwang
- Laboratory of Veterinary Internal Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Saori Umeki
- Laboratory of Veterinary Internal Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Masahito Kubo
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Toshiharu Hayashi
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Shimoda
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masami Mochizuki
- Emerging Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Ken Maeda
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Baba
- Yamaguchi University Animal Medical Center, Yamaguchi, Japan
| | - Hiroko Hiraoka
- Yamaguchi University Animal Medical Center, Yamaguchi, Japan
| | - Matt Coffey
- Oncolytics Biotech Inc., Calgary, Alberta, Canada
| | - Masaru Okuda
- Laboratory of Veterinary Internal Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
- Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Takuya Mizuno
- Laboratory of Veterinary Internal Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
- Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
- * E-mail:
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