1
|
Eberspächer-Schweda MC, Schmitt K, Handschuh S, Fuchs-Baumgartinger A, Reiter AM. Diagnostic Yield of Micro-Computed Tomography (micro-CT) Versus Histopathology of a Canine Oral Fibrosarcoma. J Vet Dent 2020; 37:14-21. [PMID: 32484022 DOI: 10.1177/0898756420926519] [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: 11/16/2022]
Abstract
Micro-computed tomography (micro-CT) imaging currently gains increased interest in human as well as veterinary medicine. The ability to image 3-dimensional (3D) biopsy specimens nondestructively down to 1 µm spatial resolution makes it a promising tool for microscopic tissue evaluation in addition to histopathology. Visualizing tumor margins and calculating tumor load on 3D reconstructions may also enhance oncological therapies. The objective of this study was to describe the workflow from tumor resection to histopathological diagnosis, using both routine hematoxylin-eosin (HE)-stained sections and micro-CT tomograms on a stage II oral fibrosarcoma in a 7-year-old Hovawart dog. The maxillectomy specimen was fixed with formalin and stained with an X-ray dense soft tissue contrast agent. Micro-CT imaging was done using an ex vivo specimen micro-CT device. Tumor margins could not be exactly determined on micro-CT tomograms due to limited image resolution and contrast. Histopathology was performed after washing out the contrast agent. It showed neoplastic cells infiltrating the surrounding tissue further than assumed from micro-CT images. A total tumor volume of 10.3 cm3 could be calculated based on correlating micro-CT tomograms with HE-stained sections. This correlative approach may be of particular interest for oncological therapy. More than that, micro-CT imaging technology supported histopathology by means of 3D orientation and selection of slices to be cut on determining tumor margins. In this clinical case report, micro-CT imaging did not provide unambiguous clinical evidence for oncological decision-making, but it showed potential to support histopathology and calculate tumor volume for further clinical use.
Collapse
Affiliation(s)
- Matthias C Eberspächer-Schweda
- Dentistry and Oral Surgery Service, Clinic of Small Animal Surgery, Department of Small Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Kira Schmitt
- Dentistry and Oral Surgery Service, Clinic of Small Animal Surgery, Department of Small Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Stephan Handschuh
- VetCore Facility for Research Imaging Unit, University of Veterinary Medicine Vienna, Vienna, Austria
| | | | - Alexander M Reiter
- Dentistry and Oral Surgery Service, Section of Surgery, Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
2
|
Torii M, Fukui T, Inoue M, Kanao S, Umetani K, Shirai M, Inagaki T, Tsuchimochi H, Pearson JT, Toi M. Analysis of the microvascular morphology and hemodynamics of breast cancer in mice using SPring-8 synchrotron radiation microangiography. JOURNAL OF SYNCHROTRON RADIATION 2017; 24:1039-1047. [PMID: 28862627 PMCID: PMC5580789 DOI: 10.1107/s1600577517008372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 06/06/2017] [Indexed: 05/13/2023]
Abstract
Tumor vasculature is characterized by morphological and functional abnormalities. However, analysis of the dynamics in blood flow is still challenging because of limited spatial and temporal resolution. Synchrotron radiation (SR) microangiography above the K-edge of the iodine contrast agent can provide high-contrast imaging of microvessels in time orders of milliseconds. In this study, mice bearing the human breast cancer cell lines MDAMB231 and NOTCH4 overexpression in MDAMB231 (MDAMB231NOTCH4+) and normal mice were assessed using SR microangiography. NOTCH is transmembrane protein that has crucial roles for vasculogenesis, angiogenesis and tumorigenesis, and NOTCH4 is considered to be a cause of high-flow arteriovenous shunting. A subgroup of mice received intravenous eribulin treatment, which is known to improve intratumor core circulation (MDAMB231_eribulin). Microvessel branches from approximately 200 µm to less than 20 µm in diameter were observed within the same visual field. The mean transition time (MTT) was measured as a dynamic parameter and quantitative analysis was performed. MTT in MDAMB231 was longer than that in normal tissue, and MDAMB231NOTCH4+ showed shorter MTT [5.0 ± 1.4 s, 3.6 ± 1.0 s and 3.6 ± 1.1 s (mean ± standard deviation), respectively]. After treatment, average MTT was correlated to tumor volume (r = 0.999) in MDAMB231_eribulin, while in contrast there was no correlation in MDAMB231 (r = -0.026). These changes in MTT profile are considered to be driven by the modulation of intratumoral circulation dynamics. These results demonstrate that a SR microangiography approach enables quantitative analysis of morphological and dynamic characteristics of tumor vasculature in vivo. Further studies will reveal new findings concerning vessel function in tumors.
Collapse
Affiliation(s)
- Masae Torii
- Department of Breast Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshifumi Fukui
- Medical Imaging System Development Center, Canon, Tokyo, Japan
| | - Masashi Inoue
- Medical Imaging System Development Center, Canon, Tokyo, Japan
| | - Shotaro Kanao
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Keiji Umetani
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute, Hyogo, Japan
| | - Mikiyasu Shirai
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Tadakatsu Inagaki
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Hirotsugu Tsuchimochi
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - James T. Pearson
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Masakazu Toi
- Department of Breast Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
3
|
Shibata K, Fukamachi K, Tsuji A, Saga T, Futakuchi M, Nagino M, Tsuda H, Suzui M. In vivo18F-fluorodeoxyglucose-positron emission tomography/computed tomography imaging of pancreatic tumors in a transgenic rat model carrying the human KRASG12V oncogene. Oncol Lett 2015; 9:2112-2118. [PMID: 26137023 DOI: 10.3892/ol.2015.3053] [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: 03/25/2014] [Accepted: 12/19/2014] [Indexed: 11/06/2022] Open
Abstract
A novel KRAS-mediated transgenic rat model has previously been demonstrated, in which animals develop multiple pancreatic ductal adenocarcinoma (PDAC) that is histologically similar to human PDAC within two weeks. Positron emission tomography (PET)/computed tomography (CT) is commonly used for the diagnosis and staging of PDAC in humans, and can be adopted for optimal use in animal experiments. The aim of the present study was to evaluate the carcinogenic process in a rat pancreatic carcinoma model using small-animal multimodality imaging systems. The utility of fluorodeoxyglucose (FDG)-PET/CT in detecting the location and size of PDAC during tumor development in the present transgenic rat model was assessed. A small animal multimodality PET/CT system and contrast-enhanced CT (CECT) system were used for the imaging analysis of KRASG12V male transgenic rats (n=6), which developed pancreatic tumors following the administration of an injection of Cre recombinase (Cre)-carrying adenovirus. Laparotomies performed at six weeks post-treatment revealed that all three (100%) Cre-expressing rats developed pancreatic tumors that were <2 mm in diameter, none of which were detected by 18F-FDG PET/CT or CECT. At eight weeks post-treatment, the pancreatic tumors were heterogeneously visualized by 18F-FDG-PET/CT and CECT in two of the three rats. Furthermore, the autopsies confirmed that all three rats had developed pancreatic tumors. These novel findings provide evidence that the FDG-PET/CT imaging system is a valuable tool for the evaluation of the carcinogenic process, and one which may aid in treatment and preventive methods for pancreatic tumors in mammalian models. A limitation associated with the early detection of PDACs warrants further investigation.
Collapse
Affiliation(s)
- Koji Shibata
- Department of Molecular Toxicology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi 467-8601, Japan ; Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi 466-8550, Japan
| | - Katsumi Fukamachi
- Department of Molecular Toxicology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi 467-8601, Japan
| | - Atsushi Tsuji
- Diagnostic Imaging Program, Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Chiba 263-8555, Japan
| | - Tsuneo Saga
- Diagnostic Imaging Program, Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Chiba 263-8555, Japan
| | - Mitsuru Futakuchi
- Department of Molecular Toxicology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi 467-8601, Japan
| | - Masato Nagino
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi 466-8550, Japan
| | - Hiroyuki Tsuda
- Laboratory of Nanotoxicology Project, Nagoya University, Nagoya, Aichi 467-8603, Japan
| | - Masumi Suzui
- Department of Molecular Toxicology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi 467-8601, Japan
| |
Collapse
|
4
|
Kuroda Y, Hayashi S, Hagio S, Abe M, Furukawa S, Nakae D. Pancreatic Ductal Adenocarcinoma in a Wistar Hannover GALAS Rat. J Toxicol Pathol 2014; 27:147-51. [PMID: 25352717 PMCID: PMC4110940 DOI: 10.1293/tox.2013-0068] [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: 12/29/2013] [Accepted: 03/31/2014] [Indexed: 12/02/2022] Open
Abstract
There are no reported spontaneous cases of pancreatic ductal adenocarcinoma (PDAC), and there are few reports about chemically-induced PDAC in rats. We encountered a PDAC in a Wistar Hannover GALAS rat that had been subjected to a medium-term multiorgan carcinogenicity bioassay. This article describes the histological and histochemical findings of the tumor. The tumor was located in the pancreatic tissue and had not invaded the liver parenchyma or the mucosal layer of the alimentary tract. The tumor cells were atypical and were mainly arranged in small tubules. In addition, abundant stroma and mucus production were observed in the tumor. In an immunohistochemical examination, the tumor cells were positive for cytokeratin, Sox9 and pancreas duodenum homeobox 1 and negative for amylase 2A and insulin. Therefore, the tumor was diagnosed as a PDAC based on its histological and histochemical findings. We considered that the tumor was caused by the carcinogens administered during the abovementioned bioassay.
Collapse
Affiliation(s)
- Yusuke Kuroda
- Toxicology and Environmental Science Department, Biological Research Laboratories, Nissan Chemical Industries, Ltd., 1470 Shiraoka, Shiraoka-shi, Saitama 349-0294, Japan
| | - Seigo Hayashi
- Toxicology and Environmental Science Department, Biological Research Laboratories, Nissan Chemical Industries, Ltd., 1470 Shiraoka, Shiraoka-shi, Saitama 349-0294, Japan
| | - Soichiro Hagio
- Toxicology and Environmental Science Department, Biological Research Laboratories, Nissan Chemical Industries, Ltd., 1470 Shiraoka, Shiraoka-shi, Saitama 349-0294, Japan
| | - Masayoshi Abe
- Toxicology and Environmental Science Department, Biological Research Laboratories, Nissan Chemical Industries, Ltd., 1470 Shiraoka, Shiraoka-shi, Saitama 349-0294, Japan
| | - Satoshi Furukawa
- Toxicology and Environmental Science Department, Biological Research Laboratories, Nissan Chemical Industries, Ltd., 1470 Shiraoka, Shiraoka-shi, Saitama 349-0294, Japan
| | - Dai Nakae
- Department of Pharmaceutical Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan ; Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| |
Collapse
|
5
|
Imai T, Kitahashi T. A 13-week toxicity study of acrylamide administered in drinking water to hamsters. J Appl Toxicol 2012; 34:57-65. [DOI: 10.1002/jat.2831] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 09/08/2012] [Accepted: 09/08/2012] [Indexed: 01/20/2023]
Affiliation(s)
- Toshio Imai
- Central Animal Division; National Cancer Center Research Institute; 5-1-1 Tsukiji, Chuo-ku Tokyo 104-0045 Japan
| | - Tsukasa Kitahashi
- Central Animal Division; National Cancer Center Research Institute; 5-1-1 Tsukiji, Chuo-ku Tokyo 104-0045 Japan
| |
Collapse
|
6
|
Magnetic resonance imaging for pancreatic ductal adenocarcinomas induced by N-nitrosobis (2-oxopropyl) amine in Syrian golden hamsters. Pancreas 2012; 41:782-8. [PMID: 22249130 DOI: 10.1097/mpa.0b013e31823ba75a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVES This study aimed to study magnetic resonance imaging (MRI) findings of pancreatic ductal adenocarcinomas (PDAs) induced by N-nitrosobis (2-oxopropyl) amine (BOP) in Syrian hamsters. METHODS A total of 101 female hamsters, 8 weeks old, were randomized into 3 groups. They were randomized into a BOP-treated group (n = 80; with weekly subcutaneous injections of BOP [10 mg/kg body weight] for 7 consecutive weeks), a saline-treated group (n = 16), and an untreated group (n = 5). Hamsters underwent abdominal MRI on 1.5-T MR scanners with a dedicated animal radiofrequency coil. Findings of the tumor from the MRI were compared those from histology. RESULTS Pancreata in the saline-treated and in the untreated groups were normal. In the BOP-treated group, there were 23 and 31 BOP-induced PDAs on macroscopy and microscopy, respectively. Of the PDAs detected on macroscopy, 65.2% were depicted on MRI. As early as 13 and 19 weeks after the first injection of BOP, PDAs in hamsters were found on histology and MRI, respectively. Moreover, the tumor volume on MRI was correlated with the tumor weights excised (r = 0.96, P = 0.000, n = 15). CONCLUSIONS N-nitrosobis (2-oxopropyl) amine successfully induced PDAs in hamsters. Magnetic resonance imaging has the ability to detect healthy pancreas and PDAs in hamsters and has the potential to monitor the development of PDAs.
Collapse
|