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Crisafulli S, Fontana A, L'Abbate L, Vitturi G, Cozzolino A, Gianfrilli D, De Martino MC, Amico B, Combi C, Trifirò G. Machine learning-based algorithms applied to drug prescriptions and other healthcare services in the Sicilian claims database to identify acromegaly as a model for the earlier diagnosis of rare diseases. Sci Rep 2024; 14:6186. [PMID: 38485706 PMCID: PMC10940660 DOI: 10.1038/s41598-024-56240-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
Acromegaly is a rare disease characterized by a diagnostic delay ranging from 5 to 10 years from the symptoms' onset. The aim of this study was to develop and internally validate machine-learning algorithms to identify a combination of variables for the early diagnosis of acromegaly. This retrospective population-based study was conducted between 2011 and 2018 using data from the claims databases of Sicily Region, in Southern Italy. To identify combinations of potential predictors of acromegaly diagnosis, conditional and unconditional penalized multivariable logistic regression models and three machine learning algorithms (i.e., the Recursive Partitioning and Regression Tree, the Random Forest and the Support Vector Machine) were used, and their performance was evaluated. The random forest (RF) algorithm achieved the highest Area under the ROC Curve value of 0.83 (95% CI 0.79-0.87). The sensitivity in the test set, computed at the optimal threshold of predicted probabilities, ranged from 28% for the unconditional logistic regression model to 69% for the RF. Overall, the only diagnosis predictor selected by all five models and algorithms was the number of immunosuppressants-related pharmacy claims. The other predictors selected by at least two models were eventually combined in an unconditional logistic regression to develop a meta-score that achieved an acceptable discrimination accuracy (AUC = 0.71, 95% CI 0.66-0.75). Findings of this study showed that data-driven machine learning algorithms may play a role in supporting the early diagnosis of rare diseases such as acromegaly.
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Affiliation(s)
| | - Andrea Fontana
- Unit of Biostatistics, Fondazione IRCCS Casa Sollievo Della Sofferenza, San Giovanni Rotondo, Italy
| | - Luca L'Abbate
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Giacomo Vitturi
- Department of Diagnostics and Public Health, University of Verona, P.Le L.A. Scuro 10, 37124, Verona, Italy
| | - Alessia Cozzolino
- Section of Medical Pathophysiology and Endocrinology, Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Daniele Gianfrilli
- Section of Medical Pathophysiology and Endocrinology, Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Beatrice Amico
- Department of Computer Science, University of Verona, Verona, Italy
| | - Carlo Combi
- Department of Computer Science, University of Verona, Verona, Italy
| | - Gianluca Trifirò
- Department of Diagnostics and Public Health, University of Verona, P.Le L.A. Scuro 10, 37124, Verona, Italy.
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Oudin A, Moreno-Sanchez PM, Baus V, Niclou SP, Golebiewska A. Magnetic resonance imaging-guided intracranial resection of glioblastoma tumors in patient-derived orthotopic xenografts leads to clinically relevant tumor recurrence. BMC Cancer 2024; 24:3. [PMID: 38166949 PMCID: PMC10763155 DOI: 10.1186/s12885-023-11774-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Preclinical in vivo cancer models are essential tools for investigating tumor progression and response to treatment prior to clinical trials. Although treatment modalities are regularly assessed in mice upon tumor growth in vivo, surgical resection remains challenging, particularly in the orthotopic site. Here, we report a successful surgical resection of glioblastoma (GBM) in patient-derived orthotopic xenografts (PDOXs). METHODS We derived a cohort of 46 GBM PDOX models that faithfully recapitulate human disease in mice. We assessed the detection and quantification of intracranial tumors using magnetic resonance imaging (MRI).To evaluate feasibility of surgical resection in PDOXs, we selected two models representing histopathological features of GBM tumors, including diffuse growth into the mouse brain. Surgical resection in the mouse brains was performed based on MRI-guided coordinates. Survival study followed by MRI and immunohistochemistry-based evaluation of recurrent tumors allowed for assessment of clinically relevant parameters. RESULTS We demonstrate the utility of MRI for the noninvasive assessment of in vivo tumor growth, preoperative programming of resection coordinates and follow-up of tumor recurrence. We report tumor detection by MRI in 90% of GBM PDOX models (36/40), of which 55% (22/40) can be reliably quantified during tumor growth. We show that a surgical resection protocol in mice carrying diffuse primary GBM tumors in the brain leads to clinically relevant outcomes. Similar to neurosurgery in patients, we achieved a near total to complete extent of tumor resection, and mice with resected tumors presented significantly increased survival. The remaining unresected GBM cells that invaded the normal mouse brain prior to surgery regrew tumors with similar histopathological features and tumor microenvironments to the primary tumors. CONCLUSIONS Our data positions GBM PDOXs developed in mouse brains as a valuable preclinical model for conducting therapeutic studies that involve surgical tumor resection. The high detectability of tumors by MRI across a substantial number of PDOX models in mice will allow for scalability of our approach toward specific tumor types for efficacy studies in precision medicine-oriented approaches. Additionally, these models hold promise for the development of enhanced image-guided surgery protocols.
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Affiliation(s)
- Anais Oudin
- NORLUX Neuro-Oncology Laboratory, Department of Cancer Research, Luxembourg Institute of Health (LIH), 6A, Rue Nicolas-Ernest Barblé, Luxembourg, L-1210, Luxembourg
| | - Pilar M Moreno-Sanchez
- NORLUX Neuro-Oncology Laboratory, Department of Cancer Research, Luxembourg Institute of Health (LIH), 6A, Rue Nicolas-Ernest Barblé, Luxembourg, L-1210, Luxembourg
- Department of Life Sciences and Medicine, Faculty of Science, Technology and Medicine (FSTM), University of Luxembourg, Belvaux, L-4367, Luxembourg
| | - Virginie Baus
- NORLUX Neuro-Oncology Laboratory, Department of Cancer Research, Luxembourg Institute of Health (LIH), 6A, Rue Nicolas-Ernest Barblé, Luxembourg, L-1210, Luxembourg
| | - Simone P Niclou
- NORLUX Neuro-Oncology Laboratory, Department of Cancer Research, Luxembourg Institute of Health (LIH), 6A, Rue Nicolas-Ernest Barblé, Luxembourg, L-1210, Luxembourg
- Department of Life Sciences and Medicine, Faculty of Science, Technology and Medicine (FSTM), University of Luxembourg, Belvaux, L-4367, Luxembourg
| | - Anna Golebiewska
- NORLUX Neuro-Oncology Laboratory, Department of Cancer Research, Luxembourg Institute of Health (LIH), 6A, Rue Nicolas-Ernest Barblé, Luxembourg, L-1210, Luxembourg.
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Kumar A, Bockenstedt M, Laast V, Sharma A. Historical Control Background Incidence of Spontaneous Neoplastic Lesions of Sprague-Dawley Rats in 104-Week Toxicity Studies. Toxicol Pathol 2023; 51:329-356. [PMID: 38281147 DOI: 10.1177/01926233231224466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Data collected from approximately 1800 male and 1800 female Sprague-Dawley (SD) rats used in 104-week carcinogenicity studies were archived in a historical control database at Labcorp Early Development, Inc, and the neoplastic microscopic observation data from these rats were retrospectively evaluated. Historical control data can provide useful information on the range and incidence of spontaneously occurring background neoplasms in the species and strain of the test animal used in different types of toxicity studies, including studies of differing lengths, delivery of test article, and test animal. Some of the most common malignant findings noted included fibrosarcoma of skin/subcutis and thyroid C-cell carcinoma in males (2.1% each) while mammary gland carcinoma and pituitary carcinoma (25% and 2.6%) were most common in females. Pituitary adenoma of pars distalis was found to be the most prevalent benign neoplasm in both males and females (56.4% and 77.1%). Fibroadenoma of mammary gland (35.6%) and thyroid C-cell adenoma (8.5%) were the second and third most common benign tumors in female SD rats. In males, the thyroid C-cell adenoma (10.9%) and benign pheochromocytoma (8.9%) were the second and third most common tumors.
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Affiliation(s)
- Amit Kumar
- Labcorp Early Development Laboratories Inc., Madison, Wisconsin, USA
- Biogen Inc., Cambridge, Massachusetts, USA
| | - Marie Bockenstedt
- Labcorp Early Development Laboratories Inc., Madison, Wisconsin, USA
- AbbVie, Inc., North Chicago, Illinois, USA
| | - Victoria Laast
- Labcorp Early Development Laboratories Inc., Madison, Wisconsin, USA
| | - Alok Sharma
- Labcorp Early Development Laboratories Inc., Madison, Wisconsin, USA
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Varela-López A, Ramírez-Tortosa CL, Ramos-Pleguezuelos FM, Márquez-Lobo B, Battino M, Quiles JL. Differences reported in the lifespan and aging of male Wistar rats maintained on diets containing fat with different fatty acid profiles (virgin olive, sunflower or fish oils) are not reflected by histopathological lesions found at death in central nervous and endocrine systems. Food Chem Toxicol 2022; 168:113357. [PMID: 35985366 DOI: 10.1016/j.fct.2022.113357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/27/2022] [Accepted: 08/04/2022] [Indexed: 11/16/2022]
Abstract
The present study was designed to examine if dietary fat sources that have shown differences in lifespan and if some aging-related aspects can modulate the range of histopathologic changes in central nervous and endocrine systems that occur during the lifespan of Wistar rats. Moreover, it was attempted to gain insight into the relationship between longevity and the development of the different pathological changes, as well as possible interaction with diet. In order to achieve this, male Wistar rats were randomly assigned to three experimental groups fed semisynthetic and isoenergetic diets from weaning until death with different dietary fat sources, namely virgin olive, sunflower, or fish oil. An individual follow-up until death of each animal was performed. Incidence, severity, and burden of specific or group (i.e., neoplastic or non-neoplastic proliferative and non-proliferative) of lesions was calculated along with individual's disease and individual organ lesion burden. Most of the histopathological lesions found have been described in previous studies. Neoplasms, and in particular pituitary adenomas followed by brain tumors, were the most prevalent lesions found in the rats and the main cause of death involving both systems. Incidence of brain lesions was associated with age-at-death. Assayed dietary fats did not present differential effects on pathological changes occurring in endocrine and central nervous systems throughout rat lifespan.
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Affiliation(s)
- Alfonso Varela-López
- Department of Physiology, Institute of Nutrition and Food Technology "Jose Mataix Verdú," Biomedical Research Center, University of Granada, Armilla, Granada, Spain.
| | | | | | | | - Maurizio Battino
- Department of Clinical Sciences, Polytechnic University of Marche, 60131, Ancona, Italy; International Joint Research Laboratory of Intelligent Agriculture and Agri-products Processing, Jiangsu University, Zhenjiang, 212013, China
| | - José L Quiles
- Department of Physiology, Institute of Nutrition and Food Technology "Jose Mataix Verdú," Biomedical Research Center, University of Granada, Armilla, Granada, Spain; Research Group on Foods, Nutritional Biochemistry and Health, Universidad Europea del Atlántico, Isabel Torres, 21, 39011, Santander, Spain.
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Acrylonitrile induction of rodent neoplasia: Potential mechanism of action and relevance to humans. TOXICOLOGY RESEARCH AND APPLICATION 2022. [DOI: 10.1177/23978473211055363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Acrylonitrile, an industrial chemical, is a multisite carcinogen in rats and mice, producing tumors in four tissues with barrier function, that is, brain, forestomach, Zymbal’s gland, and Harderian gland. To assess mechanism(s) of action (MoA) for induction of neoplasia and to evaluate whether the findings in rodents are indicative of human hazard, data on the potential key effects produced by acrylonitrile in the four rodent target tissues of carcinogenicity were evaluated. A notable finding was depletion of glutathione in various organs, including two target tissues, the brain, and forestomach, suggesting that this effect could be a critical initiating event. An additional combination of oxidative DNA damage and cytotoxic effects of acrylonitrile and its metabolites, cyanide, and 2-cyanoethylene oxide, could initiate pro-inflammatory signaling and sustained cell and tissue injury, leading to compensatory cell proliferation and neoplastic development. The in vivo DNA-binding and genotoxicity of acrylonitrile has been studied in several target tissues with no compelling positive results. Thus, while some mutagenic effects were reported in acrylonitrile-exposed rodents, data to determine whether this mutagenicity stems from direct DNA reactivity of acrylonitrile are insufficient. Accordingly, the induction of tumors in rodents is consistent primarily with a non-genotoxic MoA, although a contribution from weak mutagenicity cannot be ruled out. Mechanistic data to support conclusions regarding human hazard from acrylonitrile exposure is weak. Comparison of metabolism of acrylonitrile between rodents and humans provide little support for human hazard. Three of the tissues affected in bioassays (forestomach, Zymbal’s gland, and Harderian gland) are present only in rodents, while the brain is anatomically different between rodents and humans, diminishing relevance of tumor induction in these tissues to human hazard. Extensive epidemiological data has not revealed causation of human cancer by acrylonitrile.
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Cooper TK, Meyerholz DK, Beck AP, Delaney MA, Piersigilli A, Southard TL, Brayton CF. Research-Relevant Conditions and Pathology of Laboratory Mice, Rats, Gerbils, Guinea Pigs, Hamsters, Naked Mole Rats, and Rabbits. ILAR J 2022; 62:77-132. [PMID: 34979559 DOI: 10.1093/ilar/ilab022] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/12/2021] [Indexed: 12/31/2022] Open
Abstract
Animals are valuable resources in biomedical research in investigations of biological processes, disease pathogenesis, therapeutic interventions, safety, toxicity, and carcinogenicity. Interpretation of data from animals requires knowledge not only of the processes or diseases (pathophysiology) under study but also recognition of spontaneous conditions and background lesions (pathology) that can influence or confound the study results. Species, strain/stock, sex, age, anatomy, physiology, spontaneous diseases (noninfectious and infectious), and neoplasia impact experimental results and interpretation as well as animal welfare. This review and the references selected aim to provide a pathology resource for researchers, pathologists, and veterinary personnel who strive to achieve research rigor and validity and must understand the spectrum of "normal" and expected conditions to accurately identify research-relevant experimental phenotypes as well as unusual illness, pathology, or other conditions that can compromise studies involving laboratory mice, rats, gerbils, guinea pigs, hamsters, naked mole rats, and rabbits.
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Affiliation(s)
- Timothy K Cooper
- Department of Comparative Medicine, Penn State Hershey Medical Center, Hershey, PA, USA
| | - David K Meyerholz
- Department of Pathology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa, USA
| | - Amanda P Beck
- Department of Pathology, Yeshiva University Albert Einstein College of Medicine, Bronx, New York, USA
| | - Martha A Delaney
- Zoological Pathology Program, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana-Champaign, Illinois, USA
| | - Alessandra Piersigilli
- Laboratory of Comparative Pathology and the Genetically Modified Animal Phenotyping Service, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Teresa L Southard
- Department of Biomedical Sciences, Cornell University College of Veterinary Medicine, Ithaca, New York, USA
| | - Cory F Brayton
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Takagi M, Yamaguchi Y, Yamakawa S, Tamura K. Malignant pinealoma observed in the deep cerebral parenchyma of a male Wistar rat. J Toxicol Pathol 2022; 35:117-121. [PMID: 35221505 PMCID: PMC8828600 DOI: 10.1293/tox.2021-0047] [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: 08/04/2021] [Accepted: 11/02/2021] [Indexed: 11/23/2022] Open
Abstract
This report describes a case of spontaneous malignant pinealoma in a 90-week-old male
Wistar rat. The tumor mass occurred in the deep cerebral parenchyma and no intact pineal
gland was observed in the area between the posterior-dorsal median line of the cerebrum
and the cerebellum. The tumor was characterized by a large nodular proliferation occupying
the central area of the brain, extending from the dorsal surface to the base of the brain,
corresponding to the thalamus. The tumor cells had round to irregular oblong nuclei
approximately 5–17 μm in diameter and showed faintly or moderately eosinophilic cytoplasm
and indistinct cell boundaries. Immunohistochemically, the tumor cells were positive for
synaptophysin and partially positive for neuron-specific enolase (NSE). The tumor showed
malignant features including cellular pleomorphism, high mitotic index, necrotic foci, and
invasive and extensive growth and was, therefore, diagnosed as an extremely rare malignant
pinealoma in the deep cerebral parenchyma.
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Affiliation(s)
- Mizuho Takagi
- Pathology Division, BoZo Research Center Inc., 1284 Kamado, Gotemba-shi, Shizuoka 412-0039, Japan
| | - Yuko Yamaguchi
- Pathology Division, BoZo Research Center Inc., 1284 Kamado, Gotemba-shi, Shizuoka 412-0039, Japan
| | - Seiki Yamakawa
- Pathology Division, BoZo Research Center Inc., 1284 Kamado, Gotemba-shi, Shizuoka 412-0039, Japan
| | - Kazutoshi Tamura
- Pathology Division, BoZo Research Center Inc., 1284 Kamado, Gotemba-shi, Shizuoka 412-0039, Japan
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Elmore SA, Choudhary S, Krane GA, Plumlee Q, Quist EM, Suttie AW, Tokarz DA, Ward JM, Cora M. Proceedings of the 2021 National Toxicology Program Satellite Symposium. Toxicol Pathol 2021; 49:1344-1367. [PMID: 34634962 DOI: 10.1177/01926233211043497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The 2021 annual National Toxicology Program (NTP) Satellite Symposium, entitled "Pathology Potpourri," was the 20th anniversary of the symposia and held virtually on June 25th, in advance of the Society of Toxicologic Pathology's 40th annual meeting. The goal of this symposium was to present and discuss challenging diagnostic pathology and/or nomenclature issues. This article presents summaries of the speakers' talks along with select images that were presented to the audience for voting and discussion. Various lesions and topics covered during the symposium included differentiation of canine oligodendroglioma, astrocytoma, and undefined glioma with presentation of the National Cancer Institute's updated diagnostic terminology for canine glioma; differentiation of polycystic kidney, dilated tubules and cystic tubules with a discussion of human polycystic kidney disease; a review of various rodent nervous system background lesions in control animals from NTP studies with a focus on incidence rates and potential rat strain differences; vehicle/excipient-related renal lesions in cynomolgus monkeys with a discussion on the various cyclodextrins and their bioavailability, toxicity, and tumorigenicity; examples of rodent endometrial tumors including intestinal differentiation in an endometrial adenocarcinoma that has not previously been reported in rats; a review of various rodent adrenal cortex lesions including those that represented diagnostic challenges with multiple processes such as vacuolation, degeneration, necrosis, hyperplasia, and hypertrophy; and finally, a discussion of diagnostic criteria for uterine adenomyosis, atypical hyperplasia, and adenocarcinoma in the rat.
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Affiliation(s)
- Susan A Elmore
- Cellular and Molecular Pathology Branch, National Toxicology Program, 6857National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | | | | | | | - Erin M Quist
- Experimental Pathology Laboratories, Inc, Morrisville, NC, USA
| | - Andrew W Suttie
- Labcorp Early Development Laboratories, Inc, Chantilly, VA, USA
| | - Debra A Tokarz
- Experimental Pathology Laboratories, Inc, Morrisville, NC, USA
| | | | - Michelle Cora
- Cellular and Molecular Pathology Branch, National Toxicology Program, 6857National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
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Romano AM, Frank CB. Olfactory ganglioneuroblastoma in a dog: case report and literature review. J Vet Diagn Invest 2021; 33:1013-1017. [PMID: 34109889 DOI: 10.1177/10406387211022864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A 7-y-old, intact male Alaskan Malamute was presented with a 3-mo history of stertor and epistaxis. Computed tomography of the skull revealed generalized loss of gas throughout both nasal passages with replacement by a soft tissue mass that traversed the cribriform plate. Histopathology revealed neoplastic neuroblast cells arranged in anastomosing cords, as well as separately located aggregates of ganglion cells. Both neoplastic cell populations demonstrated immunoreactivity to MAP-2, TuJ-1, and synaptophysin. Neuroblastic cells additionally exhibited punctate immunoreactivity to MCK and CK8/18. We document here both the positive neural immunohistochemical markers for this neoplasm, as well as propose possible histomorphologic variants.
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Affiliation(s)
- Ashley M Romano
- Departments of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Chad B Frank
- Departments of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
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Polledo L, Kreutzer R, Okazaki Y, Razinger T, Weber K. A craniopharyngioma in a Wistar rat most likely originated in a Rathke's cleft cyst. J Toxicol Pathol 2020; 33:183-187. [PMID: 32764844 PMCID: PMC7396730 DOI: 10.1293/tox.2019-0068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 03/16/2020] [Indexed: 11/24/2022] Open
Abstract
We examined a 110-week-old RccHanTM: WIST Wistar male rat from a carcinogenicity study. No clinical signs were observed, and the rat was sacrificed at the end of the study. Macroscopically, within the midline of the sphenoid bone, was a 10 mm, non-infiltrative, soft, heterogeneous mass. Microscopic evaluation showed an expansile, cystic proliferation, consisting of two patterns of epithelial lining: well-differentiated areas lined by a single layer to a pseudostratified, ciliated-cuboidal epithelia with Goblet cells compatible with Rathke’s cleft cyst; and poorly differentiated ones that formed irregular papillary projections, covered by atypical epithelia with squamous differentiation and hyperkeratosis compatible with areas of craniopharyngioma. Pleomorphisms were high in atypical areas with up to 2–3 mitotic figures per high power field. Within the cystic cavities, there was abrupt keratinization, mucus, cholesterol clefts, and foci of foamy macrophages. Immunohistochemistry revealed strong pancytokeratin immunolabelling of neoplastic cells confirming the epithelial origin. Well-differentiated epithelial lining showed cytokeratin-20 and cytokeratin-8 immunoreactivity, whereas the atypical squamous epithelium presented with a loss of cytokeratin-20 positive signal and weak to moderate positivity with cytokeratin-8. Areas compatible with a Rathke’s cleft cyst and craniopharyngioma were considered to co-exist in the same mass.
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Affiliation(s)
- Laura Polledo
- AnaPath GmbH, AnaPath Services, Hammerstrasse 49, 4410 Liestal, Switzerland
| | - Robert Kreutzer
- AnaPath GmbH, AnaPath Services, Hammerstrasse 49, 4410 Liestal, Switzerland
| | - Yoshimasa Okazaki
- AnaPath GmbH, AnaPath Services, Hammerstrasse 49, 4410 Liestal, Switzerland
| | - Tanja Razinger
- AnaPath GmbH, Buchsweg 56, 4625 Oberbuchsiten, Switzerland
| | - Klaus Weber
- AnaPath GmbH, Buchsweg 56, 4625 Oberbuchsiten, Switzerland
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Hojo M, Sakamoto Y, Maeno A, Tayama K, Tada Y, Yuzawa K, Ando H, Kubo Y, Nagasawa A, Tanaka K, Yano N, Kaihoko F, Hasegawa Y, Suzuki T, Inomata A, Moriyasu T, Miyajima K, Nakae D. A histopathological analysis of spontaneous neoplastic and non-neoplastic lesions in aged male RccHan:WIST rats. J Toxicol Pathol 2019; 33:47-55. [PMID: 32051666 PMCID: PMC7008206 DOI: 10.1293/tox.2019-0064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/21/2019] [Indexed: 12/28/2022] Open
Abstract
Histopathological information about spontaneous lesions in aged Hannover Wistar rats is limited. In this study, we describe spontaneous lesions found in 39 male RccHan:WIST rats used as a control in a carcinogenicity study. Neoplastic lesions were frequently seen in the endocrine system, such as pituitary adenomas in the pars distalis. This strain exhibited a high incidence of thymoma (10.3%), compared to other strains. We encountered an oligodendroglioma, a pituitary adenoma of the pars intermedia, and a prostate adenocarcinoma, which are comparatively rare in rats. While the variety and incidence of non-neoplastic lesions were similar to those in other strains, several interesting lesions occurred with relatively high incidence, including "harderianization" of the extraorbital lacrimal gland, common bile duct ectasia, and hyperplasia of pulmonary endocrine cells in the lung. Furthermore, comparative analyses demonstrated that the severity of chronic progressive nephropathy and murine progressive cardiomyopathy in RccHan:WIST rats was less than that in F344 rats.
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Affiliation(s)
- Motoki Hojo
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Yoshimitsu Sakamoto
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Ai Maeno
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Kuniaki Tayama
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Yukie Tada
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Katsuhiro Yuzawa
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Hiroshi Ando
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Yoshikazu Kubo
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Akemichi Nagasawa
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Kazuyoshi Tanaka
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Norio Yano
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Fujifumi Kaihoko
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Yuko Hasegawa
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Toshinari Suzuki
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Akiko Inomata
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Takako Moriyasu
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan
| | - Katsuhiro Miyajima
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, 1-1-1 Sakura-ga-Oka, Setagaya, Tokyo 156-8502, Japan
| | - Dai Nakae
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, 1-1-1 Sakura-ga-Oka, Setagaya, Tokyo 156-8502, Japan
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Sacaan A, Thibault S, Khan KN. Central nervous system tumors in 2-year rat carcinogenicity studies: perspectives on human risk assessment. J Toxicol Sci 2019; 44:643-655. [PMID: 31588056 DOI: 10.2131/jts.44.643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Rodent in vivo carcinogenicity bioassays are required for human risk assessment and have been utilized in this capacity for decades. Accordingly, there is an abundance of data that could be accessed and analyzed to better understand the translatability of xenobiotic-induced rodent tumors to human risk assessment. In the past decade, various groups have published assessments of the value garnered by these life-time rodent studies. Results and recommendations from the International Council for Harmonization Expert Working Group (ICH-S1 EWG) on the predictability of the current testing paradigm and proposal for an integrated approach to human carcinogenicity risk assessment are pending. Central nervous system (CNS) tumors in rats are rare and translatability to human remains unknown. This review focuses on microglial cell tumors (MCT) of the CNS in rats including its classification, nomenclature, incidence and translatability to human risk assessment. Based on emerging immunohistochemistry (IHC) characterization, glial tumors previously thought of astrocytic origin are more likely MCTs. These may be considered rodent specific and glucose dysregulation may be one component contributing to their formation. Based on review of the literature, MCTs are rarely diagnosed in humans, thus this tumor type may be rat-specific. We propose to include MCTs as a tumor type in revised International Harmonization of Nomenclature and Diagnostic Criteria (INHAND) classification and all glial tumors to be classified as MCTs unless proven otherwise by IHC.
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Affiliation(s)
- Aida Sacaan
- Pfizer Inc. Drug Safety Research and Development
| | | | - K Nasir Khan
- Pfizer Inc. Drug Safety Research and Development
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Bolon B, Krinke GJ, Pardo ID. Essential References for Structural Analysis of the Peripheral Nervous System for Pathologists and Toxicologists. Toxicol Pathol 2019; 48:87-95. [DOI: 10.1177/0192623319868160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Toxicologic neuropathology for the peripheral nervous system (PNS) is a vital but often underappreciated element of basic translational research and safety assessment. Evaluation of the PNS may be complicated by unfamiliarity with normal nerve and ganglion biology, which differs to some degree among species; the presence of confounding artifacts related to suboptimal sampling and processing; and limited experience with differentiating such artifacts from genuine disease manifestations and incidental background changes. This compilation of key PNS neurobiology, neuropathology, and neurotoxicology references is designed to allow pathologists and toxicologists to readily access essential information that is needed to enhance their proficiency in evaluating and interpreting toxic changes in PNS tissues from many species.
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Pardo ID, Weber K, Cramer S, Krinke GJ, Butt MT, Sharma AK, Bolon B. Atlas of Normal Microanatomy, Procedural and Processing Artifacts, Common Background Findings, and Neurotoxic Lesions in the Peripheral Nervous System of Laboratory Animals. Toxicol Pathol 2019; 48:105-131. [DOI: 10.1177/0192623319867322] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The ability to differentiate among normal structures, procedural and processing artifacts, spontaneous background changes, and test article–related effects in the peripheral nervous system (PNS) is essential for interpreting microscopic features of ganglia and nerves evaluated in animal species commonly used in toxicity studies evaluating regulated products and chemicals. This atlas provides images of findings that may be encountered in ganglia and nerves of animal species commonly used in product discovery and development. Most atlas images are of tissues from control animals that were processed using routine methods (ie, immersion fixation in neutral-buffered 10% formalin, embedding in paraffin, sectioning at 5 µm, and staining with hematoxylin and eosin) since these preparations are traditionally applied to study materials produced during most animal toxicity studies. A few images are of tissues processed using special procedures (ie, immersion or perfusion fixation using methanol-free 4% formaldehyde, postfixation in glutaraldehyde and osmium, embedding in hard plastic resin, sectioning at 1 µm, and staining with toluidine blue), since these preparations promote better stabilization of lipids and thus optimal resolution of myelin sheaths. Together, this compilation provides a useful resource for discriminating among normal structures, procedure- and processing-related artifacts, incidental background changes, and treatment-induced findings that may be seen in PNS tissues of laboratory animals.
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Affiliation(s)
| | | | - Sarah Cramer
- Tox Path Specialists, LLC (A StageBio Company), Frederick, MD, USA
| | | | - Mark T. Butt
- Tox Path Specialists, LLC (A StageBio Company), Frederick, MD, USA
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Shibui Y, Fujitani S, Iwata H, Lynch B, Roberts A. Histological analyses of the Ishii (1981) rat carcinogenicity study of aspartame and comparison with the Ramazzini Institute studies. Regul Toxicol Pharmacol 2019; 102:23-29. [DOI: 10.1016/j.yrtph.2018.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/14/2018] [Accepted: 12/15/2018] [Indexed: 10/27/2022]
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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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17
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Heinrichs M, Ernst H. Spontaneous malignant craniopharyngioma in an aged Wistar rat. J Toxicol Pathol 2016; 29:195-9. [PMID: 27559246 PMCID: PMC4963616 DOI: 10.1293/tox.2016-0004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 04/28/2016] [Indexed: 11/19/2022] Open
Abstract
Craniopharyngiomas are extremely rare epithelial tumors of the sellar region in human
beings and domestic and laboratory animals. A craniopharyngioma, 0.6 cm in diameter, was
observed grossly in the sellar and parasellar regions of an untreated 23-month-old male
Wistar-derived rat sacrificed moribund. The tumor was composed of cords, columns, and
nests of neoplastic stratified squamous epithelium with marked hyperkeratosis and
parakeratosis. Neoplastic cells formed solid or cystic areas, infiltrating the base of the
skull, brain, and pituitary gland. Immunocytochemical evaluation revealed a strong
cytoplasmic reaction for pan-cytokeratin in all tumor cells. Malignant craniopharyngioma
should be considered a differential diagnosis in the rat when a tumor with stratified
squamous epithelial features and a locally aggressive growth pattern is observed in the
sellar or suprasellar region.
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Affiliation(s)
- Martin Heinrichs
- Consultant in Toxicologic Pathology, Weinbergstr. 7a, D-61440 Oberursel, Germany
| | - Heinrich Ernst
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Nikolai-Fuchs-Str. 1, D-30625 Hannover, Germany
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Blankenship B, Eighmy JJ, Hoffmann G, Schroeder M, Sharma AK, Sorden SD. Findings in Historical Control Harlan RCCHan™. Toxicol Pathol 2016; 44:947-61. [DOI: 10.1177/0192623316660768] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Vehicle control Harlan RCCHan™:WIST rats were examined to provide control data for subsequent studies. The rats (180 male and 180 female) were dosed daily via oral gavage with reverse osmosis water for up to 104 weeks. At necropsy, body weights and macroscopic findings were recorded and tissues were collected for histopathology. The mean body weight at terminal sacrifice was 687 g for males and 466 g for females. The overall survival rate was 62% for males and 59% for females. The most common cause of death for males and females found dead or examined following unscheduled euthanasia was pituitary neoplasia with an incidence of 13.9% for males and 18.9% for females. Macroscopic and neoplastic and nonneoplastic microscopic findings are presented by body system.
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Elmore SA, Farman CA, Hailey JR, Kovi RC, Malarkey DE, Morrison JP, Neel J, Pesavento PA, Porter BF, Szabo KA, Teixeira LBC, Quist EM. Proceedings of the 2015 National Toxicology Program Satellite Symposium. Toxicol Pathol 2016; 44:502-35. [PMID: 27075180 DOI: 10.1177/0192623316631844] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The 2015 Annual National Toxicology Program Satellite Symposium, entitled "Pathology Potpourri" was held in Minneapolis, Minnesota, at the American College of Veterinary Pathologists/American Society for Veterinary Clinical Pathology/Society of Toxicologic Pathology combined meeting. The goal of this symposium is to present and discuss diagnostic pathology challenges or nomenclature issues. Because of the combined meeting, both laboratory and domestic animal cases were presented. This article presents summaries of the speakers' talks, including challenging diagnostic cases or nomenclature issues that were presented, along with select images that were used for audience voting and discussion. Some lesions and topics covered during the symposium included hepatocellular lesions, a proposed harmonized diagnostic approach to rat cardiomyopathy, crop milk in a bird, avian feeding accoutrement, heat exchanger in a tuna, metastasis of a tobacco carcinogen-induced pulmonary carcinoma, neurocytoma in a rat, pituicytoma in a rat, rodent mammary gland whole mounts, dog and rat alveolar macrophage ultrastructure, dog and rat pulmonary phospholipidosis, alveolar macrophage aggregation in a dog, degenerating yeast in a cat liver aspirate, myeloid leukemia in lymph node aspirates from a dog, Trypanosoma cruzi in a dog, solanum toxicity in a cow, bovine astrovirus, malignant microglial tumor, and nomenclature challenges from the Special Senses International Harmonization of Nomenclature and Diagnostic Criteria Organ Working Group.
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Affiliation(s)
- Susan A Elmore
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | | | | | - Ramesh C Kovi
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | - David E Malarkey
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | | | - Jennifer Neel
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Patricia A Pesavento
- School of Veterinary Medicine, University of California at Davis, Davis, California, USA
| | | | | | | | - Erin M Quist
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
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Lwin TT, Yoneyama A, Hara A, Ohbu M, Maruyama H, Taguchi M, Esashi S, Matsushima T, Terazaki K, Hyodo K, Takeda T. Spontaneous brain tumor imaging of aged rat by crystal X-ray interferometer-based phase-contrast X-ray CT. Acta Radiol Open 2016; 5:2058460115626958. [PMID: 26962462 PMCID: PMC4765814 DOI: 10.1177/2058460115626958] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 12/20/2015] [Indexed: 12/01/2022] Open
Abstract
Background Crystal X-ray interferometer-based phase-contrast X-ray computed tomography (C-PCCT) enables the depiction of internal structures of biological tissue without contrast agents. Purpose To determine the advantage of this technique in visualizing detailed morphological structures of a rare spontaneous brain tumor in an aged rat. Material and Methods An aged rat’s spontaneous brain tumor was imaged by C-PCCT without contrast agent. Three-dimensional (3D) images of the tumor microvasculature were reconstructed and compared with pathological pictures. Results C-PCCT depicted the tumor’s various pathological features clearly, e.g. its cell density and vasculature, and blood clots caused by hemorrhaging and/or hematomas. The obtained images resembled pathological pictures with a magnification of ×20 and were used to reconstruct 3D images of the tumor vascularity up to approximately 26 µm in diameter. Conclusion Since C-PCCT is able to depict various pathological conditions, it might be useful for cancer research.
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Affiliation(s)
- Thet-Thet Lwin
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Akio Yoneyama
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Kitasato University, School of Medicine, Sagamihara, Japan
| | - Atsuko Hara
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan; Kitasato University, School of Medicine, Sagamihara, Japan
| | - Makoto Ohbu
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Hiroko Maruyama
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Masaya Taguchi
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Shogo Esashi
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Tsubasa Matsushima
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Kei Terazaki
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Kazuyuki Hyodo
- High Energy Accelerator Research Organization, Tsukuba, Japan
| | - Tohoru Takeda
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
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Moroki T, Sasaki T, Yoshizawa K, Doi T. A spontaneously occurring malignant pituicytoma in a male sprague dawley rat. J Toxicol Pathol 2015; 28:171-6. [PMID: 26441479 PMCID: PMC4588211 DOI: 10.1293/tox.2015-0012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 04/28/2015] [Indexed: 12/03/2022] Open
Abstract
Pituicytoma is an extremely rare neoplasm derived from pituicytes, which are glial cells
in the posterior lobe of the pituitary gland. A malignant pituicytoma was found in the
intracranial cavity of a 55-week-old male Sprague-Dawley rat. Macroscopically, the tumor
was located on the sphenoid bone and involved the pituitary gland. The tumor was composed
of sheets of fusiform cells with spindle- or pleomorphic-shaped nuclei and abundant
eosinophilic cytoplasms. The cells were arranged in a whirling or irregular growth
pattern. Some tumor cells were bizarre multinucleated giant cells with cytoplasmic
eosinophilic hyaline droplets. Many tumor cells were strongly positive for vimentin and
glial fibrillary acidic protein, and some cells were positive for ED-1 and S-100. These
findings closely resembled those of a giant cell glioblastoma derived from the pituitary
gland, suggesting anaplastic pituicytoma. From our review of the literature, we believe
this is the first report of a spontaneous malignant pituicytoma in a rodent.
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Affiliation(s)
- Takayasu Moroki
- Department of Toxicological Research, Research Laboratories, Maruho Co., Ltd., 93 Awata-cho, Chudoji, Shimogyo-ku, Kyoto, Kyoto 600-8815, Japan
| | - Tomo Sasaki
- Department of Toxicological Research, Research Laboratories, Maruho Co., Ltd., 93 Awata-cho, Chudoji, Shimogyo-ku, Kyoto, Kyoto 600-8815, Japan
| | - Katsuhiko Yoshizawa
- Department of Pathology II, Kansai Medical University, 2-5-1 Shin-machi, Hirakata, Osaka 573-1010, Japan
| | - Takaaki Doi
- Department of Toxicological Research, Research Laboratories, Maruho Co., Ltd., 93 Awata-cho, Chudoji, Shimogyo-ku, Kyoto, Kyoto 600-8815, Japan
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22
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Treumann S, Buesen R, Gröters S, Eichler JO, van Ravenzwaay B. Occurrence of Pineal Gland Tumors in Combined Chronic Toxicity/Carcinogenicity Studies in Wistar Rats. Toxicol Pathol 2015; 43:838-43. [DOI: 10.1177/0192623315572700] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Pineal gland tumors are very rare brain lesions in rats as well as in other species including humans. A total of 8 (out of 1,360 examined) Wistar rats from 3 different combined chronic toxicity/carcinogenicity or mere carcinogenicity studies revealed pineal gland tumors. The tumors were regarded to be spontaneous and unrelated to treatment. The morphology and immunohistochemical evaluation led to the diagnosis malignant pinealoma. The main characteristics that were variably developed within the tumors were the following: cellular atypia, high mitotic index, giant cells, necrosis, Homer Wright rosettes, Flexner-Wintersteiner rosettes and pseudorosettes, positive immunohistochemical reaction for synaptophysin, and neuron-specific enolase. The pineal gland is not a protocol organ for histopathological examination in carcinogenicity studies. Nevertheless, the pineal gland can occasionally be encountered on the routine brain section or if it is the origin of a tumor protruding into the brain, the finding will be recorded. Therefore, although known to be a rare tumor in rats, pineal neoplasms should be included in the list of possible differential diagnoses for brain tumors, especially when the tumor is located in the region of the pineal body.
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Affiliation(s)
- Silke Treumann
- Experimental Toxicology and Ecology, BASF SE, Ludwigshafen, Germany
| | - Roland Buesen
- Experimental Toxicology and Ecology, BASF SE, Ludwigshafen, Germany
| | - Sibylle Gröters
- Experimental Toxicology and Ecology, BASF SE, Ludwigshafen, Germany
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Takeda S, Asano H, Ihara R, Ogata K, Kushida M. A Spontaneous Oligodendroglioma in the Lumbar Portion of the Spinal Cord in a Young BrlHan:WIST@Jcl (GALAS) Rat. J Toxicol Pathol 2014; 27:143-6. [PMID: 25352716 PMCID: PMC4110939 DOI: 10.1293/tox.2014-0010] [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: 03/10/2014] [Accepted: 03/24/2014] [Indexed: 11/19/2022] Open
Abstract
Oligodendroglioma is a rare tumor originating from oligodendrocytes found mainly in the cerebrum in aged rats. Only a few reports have shown spontaneous occurrence of this tumor in the spinal cord, and no report has mentioned its occurrence in young rats. We encountered a case of spontaneous oligodendroglioma in the lumbar portion of the spinal cord in a young (9 weeks old) female BrlHan:WIST@Jcl (GALAS) rat. Here we report the detailed histopathological and immunohistochemical characteristics of this case. No clinical signs, no gross lesions at necropsy, and no specific changes in hematology or blood biochemistry were observed. The tumor was located in the dorsal funiculus in the lumbar portion of the spinal cord and widely spread to the dorsal root nerve. The neoplastic cells showed a sheet-like growth pattern and had small round nuclei, clear cytoplasm and distinct cell borders that resulted in a honeycomb pattern. No mitotic figures or other histological lesions were observed. The neoplastic cells were positively stained for Olig2 and PCNA. The present case was considered to be a low-grade oligodendroglioma based on the histological and immunohistochemical features. To our knowledge, our case is considered to be extremely rare and the first report in a young rat.
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Affiliation(s)
- Shuji Takeda
- Toxicology group, Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 1-98, Kasugadenaka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Hiroyuki Asano
- Toxicology group, Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 1-98, Kasugadenaka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Ryo Ihara
- Toxicology group, Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 1-98, Kasugadenaka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Keiko Ogata
- Toxicology group, Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 1-98, Kasugadenaka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Masahiko Kushida
- Toxicology group, Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 1-98, Kasugadenaka 3-chome, Konohana-ku, Osaka 554-8558, Japan
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Bertrand L, Mukaratirwa S, Bradley A. Incidence of spontaneous central nervous system tumors in CD-1 mice and Sprague-Dawley, Han-Wistar, and Wistar rats used in carcinogenicity studies. Toxicol Pathol 2014; 42:1168-73. [PMID: 24499801 DOI: 10.1177/0192623313518114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The incidence and range of spontaneous central nervous system tumors were determined in control Charles River rodents (Sprague-Dawley, Han-Wistar, Wistar rats, and CD-1 mice) from regulatory carcinogenicity studies carried out over the period 2002 to 2013 and were compared with the previously published data. In both species, the brain was notably more affected than the spinal cord. Incidences were comparable overall between rat strains (2.33%, 2.54%, and 2.89% in Wistar, Sprague-Dawley, and Han-Wistar strains, respectively) and were low in CD-1 mice (0.42% in 104-week studies and 0.2% in 80-week studies). Predominant tumor types were granular cell tumors in Wistar and Han-Wistar rats and malignant astrocytoma in Sprague-Dawley rats. Male rats were more frequently affected than females, but no sex predilection was apparent in CD-1 mice. Occasional early-onset tumors were diagnosed in rats from study week 23 onward. It is hoped that these results will provide the pathologist and the toxicologist with an up-to-date database of background neoplastic findings in widely used rodent strains.
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Affiliation(s)
- Lise Bertrand
- Bayer CropScience - Toxicologic Pathology, Sophia-Antipolis, France
| | - Sydney Mukaratirwa
- Charles River Laboratories, Preclinical Services, Edinburgh, United Kingdom
| | - Alys Bradley
- Charles River Laboratories, Preclinical Services, Edinburgh, United Kingdom
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Burns KM, Melnick RL. MTBE: recent carcinogenicity studies. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2013; 18:66-9. [DOI: 10.1179/107735212x13293200778947] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Nagatani M, Kudo K, Yamakawa S, Ohira T, Yamaguchi Y, Ikezaki S, Suzuki I, Saito T, Hoshiya T, Tamura K, Uchida K. Occurrence of Spontaneous Tumors in the Central Nervous System (CNS) of F344 and SD Rats. J Toxicol Pathol 2013; 26:263-73. [PMID: 24155559 PMCID: PMC3787604 DOI: 10.1293/tox.26.263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Accepted: 03/06/2013] [Indexed: 11/22/2022] Open
Abstract
In order to accurately assess the carcinogenicity of chemicals with regard to rare
tumors such as rat CNS tumors, sufficient information about spontaneous tumors are very
important. This paper presents the data on the type, incidence and detected age of CNS
tumors in F344/DuCrlCrlj (a total of 1363 males and 1363 females) and Crl:CD(SD) rats (a
total of 1650 males and 1705 females) collected from in-house background data-collection
studies and control groups of carcinogenicity studies at our laboratory, together with
those previously reported in F344 and SD rats. The present data on F344/DuCrlCrlj rats
(F344 rats) and Crl:CD(SD) rats (SD rats) clarified the following. (1) The incidences of
all CNS tumors observed in F344 rats were less than 1%. (2) The incidences of malignant
astrocytoma and granular cell tumor were higher in male SD rats than in female SD rats.
(3) The incidences of astrocytoma and granular cell tumor were higher in SD rats than in
F344 rats. (4) Among astrocytoma, oligodendroglioma and granular cell tumor,
oligodendroglioma was detected at the youngest age, followed by astrocytoma, and
ultimately, granular cell tumor developed in both strains. The incidences observed in our
study were almost consistent with those previously reported in F344 and SD rats.
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Affiliation(s)
- Mariko Nagatani
- Hamamatsu Branch of Pathology Division, BOZO Research Center Inc., 164-2 Wada-cho, Higashi-ku, Hamamatsu, Shizuoka 435-0016, Japan
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Nakamura R, Nishimura T, Ochiai T, Nakada S, Nagatani M, Ogasawara H. Availability of a microglia and macrophage marker, iba-1, for differential diagnosis of spontaneous malignant reticuloses from astrocytomas in rats. J Toxicol Pathol 2013; 26:55-60. [PMID: 23723569 PMCID: PMC3620215 DOI: 10.1293/tox.26.55] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 11/05/2012] [Indexed: 02/04/2023] Open
Abstract
In rats, it is sometimes difficult to distinguish malignant reticuloses from astrocytomas in routine histopathological assessment. In the present study, four spontaneous brain neoplasms developing in the cerebrum of one Wistar Hannover rat and three Sprague-Dawley rats were immunohistochemically examined using microglia and macrophage markers. Histopathologically, these neoplasms were localized mainly in the cerebral cortex, hypothalamus or piriform lobe, and the portions showing solid growth did not show characteristic cellular arrangement but had an indistinct boundary with the surrounding brain parenchyma. Neoplastic cells had oval or pleomorphic small nuclei with abundant eosinophilic cytoplasm. Two cases showed neoplastic cell infiltration into the meninges and perivascular spaces. Silver staining showed lack of reticulin fiber production in the stroma of the neoplasms. Immunohistochemically, the neoplastic cells were strongly positive for Iba-1 and sporadically positive for CD68 in all four cases. On the basis of these results, all the neoplasms examined here could be distinguished from astrocytomas and diagnosed as malignant reticuloses. Thus, immunohistochemical demonstration of microglia/macrophage characters, such as using Iba-1, is considered to be helpful for differential diagnosis of malignant reticuloses from astrocytomas among spontaneously occurring primary brain neoplasms in rats.
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Affiliation(s)
- Ryuichi Nakamura
- Faculty of Safety & ADME, Asubio Pharma Co., Ltd., 6-4-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Tomonari Nishimura
- Faculty of Safety & ADME, Asubio Pharma Co., Ltd., 6-4-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Taehito Ochiai
- Faculty of Safety & ADME, Asubio Pharma Co., Ltd., 6-4-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Satomi Nakada
- Quality Assurance Section, Tatebayashi Plant, Daiichi Sankyo Propharma Co., Ltd., 2716-1 Kurakake, Chiyoda-machi, Ohra-gun, Gunma 370-0503, Japan
| | - Mariko Nagatani
- Hamamatsu Branch of Pathology Division, BOZO Research Center Inc., 164-2 Wada-cho, Higashi-ku, Hamamatsu, Shizuoka 435-0016, Japan
| | - Hiroyuki Ogasawara
- Faculty of Safety & ADME, Asubio Pharma Co., Ltd., 6-4-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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Nagatani M, Yamakawa S, Saito T, Ando R, Hoshiya T, Tamura K, Uchida K. GFAP-positive neoplastic astrocytes in spontaneous oligodendrogliomas and mixed gliomas of rats. Toxicol Pathol 2012; 41:653-61. [PMID: 23076037 DOI: 10.1177/0192623312463987] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
It is generally said that neoplastic cells are immunohistochemically negative for glial fibrillary acidic protein (GFAP) in rat spontaneous astrocytomas, and there are no reports describing the existence of GFAP-positive neoplastic astrocytes in rat spontaneous oligodendrogliomas and mixed gliomas which contain neoplastic astrocytes. In the present study, to clarify whether GFAP-positive neoplastic astrocytes exist in rat spontaneous oligodendrogliomas and mixed gliomas or not, immunohistochemical examination was performed on spontaneous oligodendrogliomas (26 cases) and mixed gliomas (5 cases) collected from the carcinogenicity studies and short-term toxicity studies. The neoplastic cells that constitute oligodendrogliomas and mixed gliomas were morphologically classified into five types: round A, round B, round C, spindle, and bizarre. The cells of round A, B, and C types were thought to be neoplastic oligodendrocytes because of their positive immunostainability for Olig2. The origin of bizarre cells was obscure because they were negative for Olig2, GFAP, and nestin. The spindle cells were considered to be neoplastic astrocytes, because some of them were positive for GFAP or nestin, and GFAP-positive spindle cells could be morphologically distinguished from reactive astrocytes. In conclusion, the present study clarified for the first time that GFAP-positive neoplastic astrocytes exist in rat spontaneous gliomas.
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Affiliation(s)
- Mariko Nagatani
- Pathology Division, Gotemba Laboratories, BOZO Research Center Inc., Shizuoka, Japan.
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Kaufmann W, Bolon B, Bradley A, Butt M, Czasch S, Garman RH, George C, Gröters S, Krinke G, Little P, McKay J, Narama I, Rao D, Shibutani M, Sills R. Proliferative and nonproliferative lesions of the rat and mouse central and peripheral nervous systems. Toxicol Pathol 2012; 40:87S-157S. [PMID: 22637737 DOI: 10.1177/0192623312439125] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Harmonization of diagnostic nomenclature used in the pathology analysis of tissues from rodent toxicity studies will enhance the comparability and consistency of data sets from different laboratories worldwide. The INHAND Project (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions in Rats and Mice) is a joint initiative of four major societies of toxicologic pathology to develop a globally recognized nomenclature for proliferative and nonproliferative lesions in rodents. This article recommends standardized terms for classifying changes observed in tissues of the mouse and rat central (CNS) and peripheral (PNS) nervous systems. Sources of material include academic, government, and industrial histopathology databases from around the world. Covered lesions include frequent, spontaneous, and aging-related changes as well as principal toxicant-induced findings. Common artifacts that might be confused with genuine lesions are also illustrated. The neural nomenclature presented in this document is also available electronically on the Internet at the goRENI website (http://www.goreni.org/).
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Li Y, Shiraiwa K, Ko KN, Moon J, Park SH, Lee M, Shin S, Kim M, Jang H, Lee Y, Kim D, Kang JS, Kang JK. A paraganglioma in the posterior wall of the left atrium originating from the aortic body in a Wistar Hannover rat. ACTA ACUST UNITED AC 2012; 65:631-6. [PMID: 22884259 DOI: 10.1016/j.etp.2012.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 06/15/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022]
Abstract
A small cardiac tumor was detected in the posterior wall of the left atrium of a 110-week-old female Wistar Hannover rat (Slc: Wistar Hannover/Rcc) during a carcinogenicity historical control study. Tumor was consisted of 2 different cells. Most of the tumor cells were polygonal to oval in shape and had slightly basophilic and granular cytoplasm. These cells were arranged in distinctive cell nests, called 'Zellballen', and were separated by reticulin fibers. The nuclei were round to slightly oval. A few mitotic figures were found. Cytoplasmic granules of tumor cells were negative for Fontana-Masson and Periodic acid Schiff (PAS) staining. Immunohistochemical staining revealed that the chief cells in the tumor were positive for the neuroendocrine markers synaptophysin and chromogranin A but were negative for S-100 protein, vimentin, cytokeratin, α-smooth muscle actin, and calcitonin. In contrast, the surrounding sustentacular cells, other type of tumor cells, were positive for only S-100 protein. The immunohistochemical properties of the tumor cells were quite similar to those of the aortic body. The tumor cells had infiltrated the myocardium of the left atrium and were also noted within vessels. Based on these findings, the tumor was diagnosed as a paraganglioma originating from the aortic body.
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Affiliation(s)
- Yinghua Li
- Department of Pathology, Biotoxtech Co. Ltd., Yangcheong-ri, Ochang-eup, Chungcheongbuk-do 363-883, Republic of Korea
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