1
|
Weber K. Differences in Types and Incidence of Neoplasms in Wistar Han and Sprague-Dawley Rats. Toxicol Pathol 2017; 45:64-75. [PMID: 28068893 DOI: 10.1177/0192623316672075] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A substantial quantity of data on Sprague-Dawley (SD) and Hannover Wistar rats strains have been published concerning their source, diet, and housing conditions, as well as the incidences of nonneoplastic lesions and neoplasms observed in different laboratories. Differences between the commonly used rat strains provided by different breeders (i.e., CD (SD) vs. Harlan Sprague-Dawley strain or Crl: WI(Han) vs. Wistar Hannover (Han)-derived strain, continued breeding by RCC Ltd., Switzerland, thereafter continued breeding by Harlan) may include, but are not limited to, body weight, incidence, and onset of major nonneoplastic lesions and neoplasms, and these can impact the development of a nonclinical safety program. Fisher 344 (F344) and SD rat strains generally have the highest tumor incidences, exceeding that in Wistar rats. Certain tumors are more commonly observed in one strain, and for some, the difference in incidence may be so significant that the tumor may even be considered characteristic for a specific strain (e.g., thymoma in Wistar and amphophilic renal adenoma in SD).
Collapse
|
2
|
Shimada Y, Yoshida T, Takahashi N, Akema S, Soma K, Ohnuma-Koyama A, Sato A, Kuwahara M, Harada T. Poorly differentiated salivary gland carcinoma with prominent squamous metaplasia in a pregnant Wistar Hannover rat. J Vet Med Sci 2016; 78:859-62. [PMID: 26782134 PMCID: PMC4905844 DOI: 10.1292/jvms.15-0539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A subcutaneous pale brown-colored mass was observed macroscopically in the ventral neck of a 16-week-old Wistar rat on day 18 of gestation. The mass was well demarcated from the adjacent tissues with partial invasion into connective tissues. Necrosis and hemorrhage were evident throughout the mass. The mass comprised a diffuse sheet and a nest-like structure of epithelial cells with prominent squamous metaplasia. The neoplastic cells tested immunopositive for keratin, vimentin, glial fibrillary acidic protein and p63. A portion of the neoplastic cells exhibited a similar immunoreaction of prominin-1 to the ductal and acinar cells in normal submandibular and parotid glands. Collectively, the tumor was diagnosed as a poorly differentiated carcinoma derived from epithelial/myoepithelial lineages in the submandibular and/or parotid glands.
Collapse
Affiliation(s)
- Yuko Shimada
- Laboratory of Pathology, Toxicology Division, The Institute of Environmental Toxicology, Uchimoriya-machi 4321, Joso-shi, Ibaraki 303-0043, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Nolte T, Brander-Weber P, Dangler C, Deschl U, Elwell MR, Greaves P, Hailey R, Leach MW, Pandiri AR, Rogers A, Shackelford CC, Spencer A, Tanaka T, Ward JM. Nonproliferative and Proliferative Lesions of the Gastrointestinal Tract, Pancreas and Salivary Glands of the Rat and Mouse. J Toxicol Pathol 2016; 29:1S-125S. [PMID: 26973378 PMCID: PMC4765498 DOI: 10.1293/tox.29.1s] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The INHAND (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions in Rats and Mice) project is a joint initiative of the Societies of Toxicologic Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP), and North America (STP) to develop an internationally accepted nomenclature and diagnostic criteria for nonproliferative and proliferative lesions in laboratory animals. The purpose of this publication is to provide a standardized nomenclature and diagnostic criteria for classifying lesions in the digestive system including the salivary glands and the exocrine pancreas of laboratory rats and mice. Most lesions are illustrated by color photomicrographs. The standardized nomenclature, the diagnostic criteria, and the photomicrographs are also available electronically on the Internet (http://www.goreni.org/). Sources of material included histopathology databases from government, academia, and industrial laboratories throughout the world. Content includes spontaneous and age related lesions as well as lesions induced by exposure to test items. Relevant infectious and parasitic lesions are included as well. A widely accepted and utilized international harmonization of nomenclature and diagnostic criteria for the digestive system will decrease misunderstandings among regulatory and scientific research organizations in different countries and provide a common language to increase and enrich international exchanges of information among toxicologists and pathologists.
Collapse
Affiliation(s)
- Thomas Nolte
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an
der Riss, 88397, Germany
- Chairman of the Digestive Tract INHAND Committee
| | - Patricia Brander-Weber
- Novartis Institutes for BioMedical Research, Novartis Pharma
AG, CH-4002 Basel, Switzerland
| | - Charles Dangler
- Jackson Laboratory, Bar Harbor, Maine 04609, USA.
Present: Sanofi5 The Mountain Road, Framingham, Massachusetts 01740,
USA
| | - Ulrich Deschl
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an
der Riss, 88397, Germany
| | - Michael R. Elwell
- Covance Laboratories, Inc. 14500 Avion Parkway, Ste 125,
Chantilly, Virginia 20151, USA
| | - Peter Greaves
- University of Leicester, Department of Cancer Studies and
Molecular Medicine, Robert Kilpatrick Clinical Science Building, Leicester Royal
Infirmary, Leicester LE2 7LX, United Kingdom
| | - Richard Hailey
- GlaxoSmithKline PO Box 14164 Durham, North Carolina 27709,
USA
| | | | - Arun R. Pandiri
- Cellular and Molecular Pathology Branch, National Toxicology
Program, National Institute of Environmental Health Sciences, Research Triangle Park,
North Carolina 27709, USA
- Experimental Pathology Laboratories, Inc. PO Box 12766,
Research Triangle Park, North Carolina 27709, USA
| | - Arlin Rogers
- Tufts University, Department of Biomedical Sciences, 274
Tremont Street, Massachusetts 02111, USA
| | - Cynthia C. Shackelford
- Cellular and Molecular Pathology Branch, National Toxicology
Program, National Institute of Environmental Health Sciences, Research Triangle Park,
North Carolina 27709, USA
| | - Andrew Spencer
- Covance Laboratories Ltd, Alnwick Research Centre,
Willowburn Avenue, Alnwick, Northumberland NE66 2JH United Kingdom
| | | | | |
Collapse
|
4
|
Li Y, Kim HS, Kang MS, Shin SH, Koo KH, Kim CM, Kim KH, Peck C, Bae HI, Jeong JY, Kang JS, Kang BH. A spontaneous epithelial-myoepithelial carcinoma of the submandibular gland in a sprague-dawley rat. J Toxicol Pathol 2013; 26:67-72. [PMID: 23723571 PMCID: PMC3620217 DOI: 10.1293/tox.26.67] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Accepted: 12/03/2012] [Indexed: 01/05/2023] Open
Abstract
The present report describes a rare case of spontaneous tumor of the salivary gland in a male Sprague-Dawley rat. The clinically confirmed mass rapidly developed in the cervical region between 19 and 21 weeks of age, and the animal was subsequently euthanized. At necropsy, a well-circumscribed nodule approximately 7 × 6 cm in diameter was found at the site of the salivary gland. The cut surface of the nodule was lobulated and soft and had a pinkish tan fish-flesh appearance. One large cyst (approximately 3 × 2 cm in size) containing reddish fluid was also present in the nodule. Histopathologically, the tumor, with a partially lobulated structure, was surrounded by a thin fibrous capsule. The majority of tumor cells formed a diffuse solid sheet structure that mainly consisted of small ovoid or spindle-shaped cells. In the tumor periphery, some cells were arranged in nest-like structures. Small duct-like structures lined with a monolayer of cuboidal epithelial cells resembling an intercalated duct or large polygonal clear cells with a myoepithelial component were also observed. Mitotic figures and necrotic foci were frequently observed in solid areas. Immunohistochemically, the tumor cells were positive for cytokeratin, epithelial membrane antigen, vimentin, p63, α-smooth muscle actin and calponin. The cells were negative for calcitonin, synaptophysin and chromogranin A. On the basis of these findings, the tumor was diagnosed as an epithelial-myoepithelial carcinoma originating from the luminal epithelial cells and myoepithelial cells in the submandibular gland.
Collapse
Affiliation(s)
- Yinghua Li
- Department of Pathology, Chemon Co., Ltd., 240 Nampyeongro, Yangji-Myeon, Cheoin-Gu, Yongin-Si, Gyeonggi-Do 449-826, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Nishikawa S, Sano F, Takagi K, Okada M, Sugimoto J, Takagi S. Spontaneous poorly differentiated carcinoma with cells positive for vimentin in a salivary gland of a young rat. Toxicol Pathol 2010; 38:315-8. [PMID: 20124499 DOI: 10.1177/0192623309358905] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Spontaneous salivary gland tumors in rats are rare. The authors report a poorly differentiated carcinoma of a submandibular gland in a ten-week-old rat that was positive for vimentin. Microscopically, the neoplastic cells showed a diffuse growth pattern in most areas of the tumor mass and a nestlike structure in a part of the peripheral area. Immunohistochemically, the cells were positive for keratin and vimentin but not for alpha-smooth muscle actin. Ultrastructurally, desmosome-like structures were observed. Based on these findings, the tumor was diagnosed as a poorly differentiated carcinoma. The origin of the neoplastic cells would be either acinar or ductal cells. This suggests that acinar or ductal cells have the potential to transform into vimentin-expressing cells.
Collapse
Affiliation(s)
- Satomi Nishikawa
- Mitsubishi Tanabe Pharma Corporation-Safety Research Laboratory, Kisarazu, Japan.
| | | | | | | | | | | |
Collapse
|
6
|
Tsunenari I, Yamate J, Sharma KD, Kawachi M, Sakuma S. Expressions of vascular endothelial growth factor and basic fibroblast growth factor in tumors induced by two different cloned cell lines established from transplantable rat malignant fibrous histiocytoma. J Vet Med Sci 2000; 62:699-705. [PMID: 10945286 DOI: 10.1292/jvms.62.699] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In order to establish base-line data on angiogenic factors in development of mesenchymal tumors, expressions of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) in implanted MT-8 and MT-9 tumors, both derived from a transplantable malignant fibrous histiocytoma (MFH) in the F344 rat, were investigated by immunohistochemistry and Western blotting method. MT-8 and MT-9 tumors were developed in syngeneic rats by implant of a tumor tissue fragment. MT-8 tumors were examined on post-implantation (PI) days 3, 6, 9 and 17, and MT-9 tumors were on PI days 9, 14, 17 and 23. The growth of MT-8 tumors was faster than that of MT-9 tumors. Histologically, MT-8 tumors were features of undifferentiated sarcomas, whereas MT-9 tumors exhibited a typical storiform growth pattern of MFH. Immunohistochemically, all cells constituting MT-8 and MT-9 tumors reacted with antibodies to VEGF and bFGF, indicating production of these factors by mesenchymal neoplastic cells. However, there were no marked differences in these immunoreactions between tumors examined. Thus, the bands obtained in the Western blotting methods were densitometrically scanned. The expression levels of VEGF and bFGF gradually increased PI day 3 to 9 in MT-8 tumors and PI day 9 to 17 in MT-9 tumors. On last examination day, the levels of bFGF in both tumors and of VEGF in MT-9 tumors decreased, but the VEGF expression level in MT-8 tumors was still increased. These findings indicated that VEGF and bFGF may contribute cooperatively to angiogenesis in an early growth of mesenchymal tumor development.
Collapse
Affiliation(s)
- I Tsunenari
- Department of Toxicology and Safety Assessment, Kawanishi Pharma Research Institute, Nippon Boehringer Ingelheim Co., Ltd., Hyogo, Japan
| | | | | | | | | |
Collapse
|