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Yamane R, Tanaka M, Kaneda S. Spontaneous hemangiosarcoma in the spleen and liver of a young rat. J Toxicol Pathol 2022; 35:89-93. [PMID: 35221499 PMCID: PMC8828605 DOI: 10.1293/tox.2021-0042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/04/2021] [Indexed: 11/19/2022] Open
Abstract
Spontaneous hemangiosarcoma in young rats is rare. In this report, we describe a case of
a spontaneous hemangiosarcoma in the spleen and liver of young rats. At necropsy, multiple
pale red masses were observed in the spleen. Histopathologically, solid growth and
haphazardly arranged neoplastic cells were observed, although no characteristic growth
pattern was observed. In contrast, irregularly sized small slit-shaped spaces containing
erythrocytes were found among the neoplastic cells. Reticular fibers incompletely
surrounding the neoplastic cells were observed by silver staining. Immunohistochemistry
revealed that the neoplastic cells were positive for vWF and CD34. Electron microscopic
examination revealed that the neoplastic cells had erythrocytes in the lumen and
Weibel-Palade bodies in the cytoplasm and were arranged along a discontinuous basal
lamina. These features indicate that the tumor originated from vascular endothelial cells.
Based on these results, the tumor was diagnosed as a hemangiosarcoma in the spleen and
liver.
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Affiliation(s)
- Rina Yamane
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto-shi, Tokushima 772-8601, Japan
| | - Makoto Tanaka
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto-shi, Tokushima 772-8601, Japan
| | - Shinya Kaneda
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto-shi, Tokushima 772-8601, Japan
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Bright LA, Gardiner KL, Veeder CL, Brice AK. Hepatic Hemangiosarcoma in a Cynomolgus Macaque ( Macaca fascicularis). Comp Med 2019; 69:240-248. [PMID: 31142400 DOI: 10.30802/aalas-cm-18-000130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
An experimentally naïve, 9-y-old, intact male cynomolgus macaque was reported for bleeding from an unidentified site. Sedated physical examination indicated mild gingival separation from the lingual aspect of the upper right canine tooth as the source of the hemorrhage. Physical exam revealed a firm mass adhered to the left zygomatic arch, 2 subcutaneous nodules on the chest, and a large mass in the cranial abdomen. Radiographs revealed a large soft-tissue mass in the cranial abdomen and multifocal nodules in the caudal lung fields. On ultrasonography, the liver was grossly enlarged and contained a cavi- tated mass. Hematology and serum chemistry results demonstrated severe regenerative anemia with normal clotting times and adequate platelet count. For humane reasons, euthanasia was elected. On gross examination, the liver was markedly enlarged by an expansile mass primarily affecting the median lobe, with multiple, smaller nodules throughout the remaining lobes. Multifocal round, firm nodules were observed on the surface of all lung lobes and throughout the omentum. Histologic examination of the hepatic, cutaneous, osseous, and pulmonary lesions demonstrated well-defined, endothelium-lined vascular channels arranged in cords with abundant hemorrhage; endothelial-cell immunomarkers confirmed these results. On the basis of these findings, hepatic hemangiosarcoma, with metastases to the lungs, omentum, subcutis, and bone, was diagnosed. This case study is the first report of spontaneous hepatic hemangiosarcoma in a cynomolgus macaque and the first case with metastasis to bone in a NHP.
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Affiliation(s)
- Lauren A Bright
- Department of Pathobiology, University Laboratory Animal Resources, University of Pennsylvania, Philadelphia, Pennsylvania, Comparative Medicine Resources, Rutgers, The State University of New Jersey, Piscataway, New Jersey.,
| | - Kristin L Gardiner
- Department of Pathobiology, University Laboratory Animal Resources, University of Pennsylvania, Philadelphia, Pennsylvania, Gene Therapy Program, University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Angela K Brice
- Department of Pathobiology, University Laboratory Animal Resources, University of Pennsylvania, Philadelphia, Pennsylvania
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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).
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Tanaka M, Miyoshi S, Sawamoto O. Metastatic hemangiosarcoma of the liver in a young rat. J Toxicol Pathol 2017; 30:75-78. [PMID: 28190928 PMCID: PMC5293695 DOI: 10.1293/tox.2016-0040] [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: 06/14/2016] [Accepted: 10/06/2016] [Indexed: 11/27/2022] Open
Abstract
Spontaneous hemangiosarcoma is generally uncommon in rats. Furthermore, there are only a
few case reports in young rats. This report describes a spontaneous hemangiosarcoma in a
young 7-week-old rat. At necropsy, no remarkable changes were noted in any organs
including the liver. Histopathologically, multifocal small tumors were located mainly in
the perilobular region of the liver. The tumors comprised polygonal to short
spindle-shaped cells that showed cellular atypia and local infiltration. In the foci,
there were blood-filled spaces lined by spindle-shaped cells. Reticular fibers, which were
loosely connected together and formed an irregular network within the foci, were noticed
with Azan and silver stain. Immunohistochemistry revealed that tumor cells expressed
vascular endothelial cell markers: von willebrand factor and CD34, respectively. These
features indicate that the tumor originated from vascular endothelial cells. Although the
primary lesion was uncertain, the foci were all small and multicentrically located mainly
in the perilobular region, indicating that the liver lesion likely formed by hematogenic
metastasis. Taken together, we diagnosed this case as a metastatic hemangiosarcoma.
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Affiliation(s)
- Makoto Tanaka
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto, Tokushima 772-8601, Japan
| | - Seiji Miyoshi
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto, Tokushima 772-8601, Japan
| | - Osamu Sawamoto
- Naruto Research Laboratory, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., 115 Kuguhara, Tateiwa, Muya-cho, Naruto, Tokushima 772-8601, Japan
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Martin PL, Nnane IP, Branigan P, Louden C. Unexpected Toxicology Findings in Rats Dosed With an Antihuman IL-13 Monoclonal Antibody. Int J Toxicol 2015; 34:393-407. [PMID: 26124191 DOI: 10.1177/1091581815591840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Interleukin 13 (IL-13) is a type 2 helper T cytokine involved in allergic inflammation and immune responses to parasites. CNTO5825 is an antihuman IL-13 monoclonal antibody that inhibits the pharmacological activity of human, cynomolgus monkey, and rat IL-13. Repeated dose toxicology studies of 1- to 6-month duration were conducted in both rats and monkeys at doses of 20 to 100 mg/kg/wk. A decrease in the T cell-dependent antibody response to Keyhole Limpet Hemocyanin immunization was observed in monkeys but not in rats. In the 6-month rat study, there was a 2.2-fold increase in eosinophils in males at 3 and 6 months that was reversible. At necropsy (main and 4-month recovery), rats from control and CNTO5825-dosed groups were found to have pin worms, which may have contributed to the elevations in eosinophil. Testicular toxicity (dilatation of seminiferous tubules, atrophy, and degeneration of the germinal epithelium) was observed in 2 rats at 20 mg/kg and in 5 rats at 100 mg/kg (main and recovery). Brain lesions (unilateral focal accumulation of cells in the white matter of the cerebral cortex) were observed in 2 rats at 100 mg/kg, and vascular neoplasms (1 fatal multicentric hemangiosarcoma and 1 benign hemangioma) were observed at 100 mg/kg/wk. Overall, these studies show that CNTO5825 was without toxicity when administered to rats for up to 6 weeks and to monkeys for up to 6 months. However, when administered to rats for 6 months, a number of seemingly unrelated events occurred that could not be clearly linked to CNTO5825 administration, inhibition of IL-13, or to the immunological status of the animals.
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Affiliation(s)
| | - Ivo P Nnane
- Janssen Research and Development Inc, Spring House, PA, USA
| | | | - Calvert Louden
- Janssen Research and Development Inc, Spring House, PA, USA
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