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Anggoro D, Purba MS, Jiang F, Nishida N, Itoh H, Itamoto K, Nemoto Y, Nakaichi M, Sunahara H, Tani K. Elucidation of the radius and ulna fracture mechanisms in toy poodle dogs using finite element analysis. J Vet Med Sci 2024:23-0520. [PMID: 38556325 DOI: 10.1292/jvms.23-0520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024] Open
Abstract
Fractures occurring in the distal radius and ulna of toy breed dogs pose distinctive challenges for veterinary practitioners, requiring specialized treatment approaches primarily based on anatomical features. Finite Element Analysis (FEA) was applied to conduct numerical experiments to determine stress distribution across the bone. This methodology offers an alternative substitute for directly investigating these phenomena in living dog experiments, which could present ethical obstacles. A three-dimensional bone model of the metacarpal, carpal, radius, ulna, and humerus was reconstructed from Computed Tomography (CT) images of the toy poodle and dachshund forelimb. The model was designed to simulate the jumping and landing conditions from a vertical distance of 40 cm to the ground within a limited timeframe. The investigation revealed considerable variations in stress distribution patterns between the radius and ulna of toy poodles and dachshunds, indicating notably elevated stress levels in toy poodles compared to dachshunds. In static and dynamic stress analysis, toy poodles exhibit peak stress levels at the distal radius and ulna. The Von Mises stresses for toy poodles reach 90.07 MPa (static) and 1,090.75 MPa (dynamic) at the radius and 1,677.97 MPa (static) and 1,047.98 MPa (dynamic) at the ulna. Conversely, dachshunds demonstrate lower stress levels for 5.39 MPa (static) and 231.79 MPa (dynamic) at the radius and 390.56 MPa (static) and 513.28 MPa (dynamic) at the ulna. The findings offer valuable insights for modified treatment approaches in managing fractures in toy breed dogs, optimizing care and outcomes.
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Affiliation(s)
- Dito Anggoro
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, Gadjah Mada University
| | - Melpa Susanti Purba
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University
| | - Fei Jiang
- Department of Mechanical Engineering, Graduate School of Sciences and Technology for Innovation, Yamaguchi University
| | - Norihiro Nishida
- Department of Orthopedic Surgery, Graduate School of Medicine, Yamaguchi University
| | - Harumichi Itoh
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Kazuhito Itamoto
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Yuki Nemoto
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Hiroshi Sunahara
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Kenji Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
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Yu Y, Miyamoto T, Kimura Y, Itamoto K, Michishita M, Hatakeyama H, Nagashima T, Asada R, Yamaguchi T, Hasegawa D, Nomura Y, Lyons LA, Kosho T. Suspected malnutrition-induced reversible feline skin fragility syndrome in a cat with congenital axial deformities. Can Vet J 2024; 65:227-233. [PMID: 38434166 PMCID: PMC10880391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
A stray cat, an intact female Japanese domestic shorthair cat of unknown age (suspected to be a young adult), was rescued. The cat was lethargic and thin and had marked skin fragility, delayed wound healing without skin hyperextensibility, and hind limb proprioceptive ataxia and paresis. Survey radiography, computed tomography, and magnetic resonance imaging revealed congenital vertebral anomalies, including thoracolumbar transitional vertebrae, scoliosis resulting from a thoracic lateral wedge-shaped vertebra, and a kinked tail, and a dilated spinal cord central canal. Through nutritional support, the cat's general condition normalized, followed by a gradual and complete improvement of skin features. Whole-genome sequencing was completed; however, no pathogenic genetic variant was identified that could have caused this phenotype, including congenital scoliosis. A skin biopsy obtained 7 y after the rescue revealed no remarkable findings on histopathology or transmission electron microscopy. Based on clinical course and microscopic findings, malnutrition-induced reversible feline skin fragility syndrome (FSFS) was suspected, and nutritional support was considered to have improved the skin condition. Key clinical message: This is the second reported case of presumed malnutrition-induced reversible FSFS and was accompanied by long-term follow-up.
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Affiliation(s)
- Yoshihiko Yu
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Tadashi Miyamoto
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Yui Kimura
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Kazuhito Itamoto
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Masaki Michishita
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Hitoshi Hatakeyama
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Tomokazu Nagashima
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Rikako Asada
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Tomomi Yamaguchi
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Daisuke Hasegawa
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Yoshihiro Nomura
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Leslie A Lyons
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
| | - Tomoki Kosho
- Laboratory of Veterinary Radiology (Yu, Asada, Hasegawa), Department of Veterinary Pathology (Michishita, Nagashima), and Laboratory of Comparative Cellular Biology (Hatakeyama), Nippon Veterinary and Life Science University, Musashino, Japan; Miyamoto Animal Hospital, Yamaguchi, Japan (Miyamoto, Kimura); Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan (Itamoto); Center for Medical Genetics, Shinshu University Hospital, Matsumoto, Japan (Yamaguchi, Kosho); Department of Medical Genetics and Division of Clinical Sequencing, Shinshu University School of Medicine, Matsumoto, Japan (Yamaguchi, Kosho); Scleroprotein and Leather Research Institute, Tokyo University of Agriculture and Technology, Fuchu, Japan (Nomura); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA (Lyons); Research Center for Supports to Advanced Science, Shinshu University, Matsumoto, Japan (Kosho)
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Anggoro D, Purba MS, Jiang F, Nishida N, Itoh H, Itamoto K, Nemoto Y, Nakaichi M, Sunahara H, Tani K. Finite element study on post-screw removal stress in toy poodle radius with different plate designs and screw arrangements. Open Vet J 2024; 14:885-894. [PMID: 38682140 PMCID: PMC11052620 DOI: 10.5455/ovj.2024.v14.i3.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 02/29/2024] [Indexed: 05/01/2024] Open
Abstract
Background The study employs finite element analysis to investigate stress distribution in the radius of toy poodles after screw removal. The examination focuses on the biomechanical implications of varied screw hole configurations using 1.5 and 2.0-mm locking compression plates (LCPs) with notched head T-Plates. Aim To provide a noninvasive approach to analyzing the immediate consequences of screw removal from the radius bone in toy poodles. Specifically, it explores the impact of varied plate designs and screw arrangements on stress distribution within the forelimb bones. Methods The study constructs a three-dimensional bone model of the toy poodle's forelimb based on computed tomography (CT) images. Simulations were designed to replicate jumping and landing from a 40 cm height, comparing stress distribution in the radius post-screw removal. Results The analysis reveals significant variations in stress distribution patterns between the two LCPs. The radius implanted with the 2.0-mm LCP displays a uniform stress distribution, contrasting with the 1.5-mm plates. Localized stress concentration is observed around the screw holes, while trabecular bone regions near the screw holes exhibit lower stress levels. Conclusion The study highlights the plate designs and screw configurations that affect bone stress in toy poodle forelimbs post-screw removal. The findings provide valuable insights for veterinarians, aiding informed decisions in veterinary orthopedic practices.
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Affiliation(s)
- Dito Anggoro
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University, Japan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, Gadjah Mada University, Indonesia
| | - Melpa Susanti Purba
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University, Japan
| | - Fei Jiang
- Department of Mechanical Engineering, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Japan
| | - Norihiro Nishida
- Department of Orthopedic Surgery, Graduate School of Medicine, Yamaguchi University, Japan
| | - Harumichi Itoh
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
| | - Kazuhito Itamoto
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
| | - Yuki Nemoto
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
| | - Hiroshi Sunahara
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
| | - Kenji Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Japan
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Itoh H, Itamoto T, Tani K, Sunahara H, Nemoto Y, Nakaichi M, Iseri T, Horikirizono H, Itamoto K. Relationship between clinical parameters and malformations in dogs diagnosed with atlanto-axial instability. PLoS One 2024; 19:e0293363. [PMID: 38324604 PMCID: PMC10849214 DOI: 10.1371/journal.pone.0293363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/11/2023] [Indexed: 02/09/2024] Open
Abstract
Atlanto-axial instability is a common disease that affects toy-breed dogs. Most cases of atlanto-axial instability are congenital. Furthermore, patients with atlanto-axial instability are predisposed to other concurrent diseases. Therefore, this study aimed to retrospectively determine the presence of concurrent diseases in cases with atlanto-axial instability using imaging data and analyze the relationship between clinical parameters and the incidence of complex malformations. The clinical data and imaging findings of 41 toy-breed dogs diagnosed with atlanto-axial instability were analyzed using their medical records and imaging data. Occipital dysplasia (17/27), atlanto-occipital overlapping (22/34), dens dysplasia (27/41), Chiari-like malformation (8/34), syringomyelia (5/34), lateral ventricular enlargement (20/36), and intracranial arachnoid cyst (5/35) were observed in patients with atlanto-axial instability. The body weight of the patients in the groups with atlanto-occipital overlapping and lateral ventricular enlargement was lower than that of those in the groups without these diseases (1.78 ± 0.71 vs 2.71 ± 1.15 kg, P = 0.0269, 1.60 ± 0.40 vs 2.75 ± 1.08 kg, P = 0.001, respectively). Furthermore, when the correlation between the total number of concurrent diseases and the age at onset and body weight was examined, it became clear that lower body weight was associated with the incidence of a greater number of concurrent diseases. Thus, the findings of this study suggest that toy-breed dogs are more likely to present with complex malformations and should be evaluated carefully with additional examinations and treatment methods.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Takuya Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Yuki Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Toshie Iseri
- Laboratory of Veterinary Radiology Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Hiro Horikirizono
- Laboratory of Veterinary Radiology Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
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Horikirizono H, Nakaichi M, Itoh H, Itamoto K, Nemoto Y, Sunahara H, Tani K. Intraoperative hypertensive crisis in a dog with functional paraganglioma of the gall bladder. J Small Anim Pract 2024; 65:144-148. [PMID: 37559209 DOI: 10.1111/jsap.13665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 06/11/2023] [Accepted: 07/12/2023] [Indexed: 08/11/2023]
Abstract
A 15-year-old spayed female mongrel presented with anorexia and an abdominal mass. The mass originated from the gall bladder and was surgically resected along with divisionectomy of the central hepatic division. Paroxysmal hypertension and tachycardia were noted during manipulation of the mass. Following resection, arterial blood pressure decreased significantly. Histopathological analysis confirmed a diagnosis of neuroendocrine neoplasm. Immunohistochemical staining for synaptophysin and chromogranin A yielded diffuse and strong positive results, while gastrin was positive in only 10% of the cells. The preoperative elevated concentrations of catecholamine in the urinalysis showed a marked decrease after surgery. Based on these findings, the tumour was diagnosed as a functional paraganglioma of the gall bladder. The patient has undergone regular thoracic radiographs and ultrasound examinations and, until 431 days after surgery, has shown no signs of metastases or recurrences. Based on our literature search, we report the first case of functional paraganglioma of the gall bladder in a dog.
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Affiliation(s)
- H Horikirizono
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
- Animal Medical Centre, Faculty of Applied Biological Sciences, Gifu University, 1-1, Yanagido, Gifu, 501-1193, Japan
| | - M Nakaichi
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
| | - H Itoh
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
| | - K Itamoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
| | - Y Nemoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
| | - H Sunahara
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
| | - K Tani
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8515, Japan
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Anggoro D, Purba MS, Nishida N, Itoh H, Itamoto K, Nemoto Y, Nakaichi M, Sunahara H, Tani K. Quantitative evaluation of the biomechanical and viscoelastic properties of the dog patellar tendon in response to neuromuscular blockade at different stifle angles. PLoS One 2024; 19:e0292453. [PMID: 38166027 PMCID: PMC10760779 DOI: 10.1371/journal.pone.0292453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 09/14/2023] [Indexed: 01/04/2024] Open
Abstract
The patellar tendon (PT) is crucial for maintaining stability and facilitating movement in the stifle joint. Elastography has been recognized as a prominent method for evaluating PT properties in humans and dogs. The utilization of oscillation methods in canine studies remains limited despite their extensive documentation in human studies. Our study represents the first effort to quantitatively assess and compare the effects of muscle relaxant on the biomechanical and viscoelastic characteristics of the PT at varying stifle angles in living dogs. Five healthy female beagles were used in this study. Biomechanical (tone, stiffness, and decrement) and viscoelastic (relaxation time and creep) properties of the PT were measured using MyotonPRO (Myoton Ltd, Estonia) prior to and following administration of rocuronium (0.5 mg/kg/body weight) at normal, extended, and flexed positions. Rocuronium was selected for its safety, controllability, and widespread clinical use in veterinary anesthesia. Two-way analysis of variance showed that tone, stiffness, and decrement were significantly higher (P < 0.001) in the control group than in the muscle relaxation group. At the same time, relaxation time and creep were significantly lower (P < 0.001) in the control group than in the muscle relaxation group. The findings indicate that stifle angle position and muscle rexalant administration fundamentally alter the biomechanical loading conditions of the PT, leading to changes in its viscoelastic properties. Therefore, this novel quantitative data could benefit clinical settings that necessitate accurate and objective methods for risk identification and monitoring PT biomechanics in dogs.
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Affiliation(s)
- Dito Anggoro
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, Gadjah Mada University, Yogyakarta, Indonesia
| | - Melpa Susanti Purba
- Laboratory of Veterinary Surgery, Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Norihiro Nishida
- Department of Orthopedic Surgery, Graduate School of Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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Igase M, Inanaga S, Nishibori S, Itamoto K, Sunahara H, Nemoto Y, Tani K, Horikirizono H, Nakaichi M, Baba K, Kambayashi S, Okuda M, Sakai Y, Sakurai M, Kato M, Tsukui T, Mizuno T. Proof-of-concept study of the caninized anti-canine programmed death 1 antibody in dogs with advanced non-oral malignant melanoma solid tumors. J Vet Sci 2024; 25:e15. [PMID: 38311328 PMCID: PMC10839171 DOI: 10.4142/jvs.23144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 12/09/2023] [Accepted: 12/17/2023] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND The anti-programmed death 1 (PD-1) antibody has led to durable clinical responses in a wide variety of human tumors. We have previously developed the caninized anti-canine PD-1 antibody (ca-4F12-E6) and evaluated its therapeutic properties in dogs with advance-staged oral malignant melanoma (OMM), however, their therapeutic effects on other types of canine tumors remain unclear. OBJECTIVE The present clinical study was carried out to evaluate the safety profile and clinical efficacy of ca-4F12-E6 in dogs with advanced solid tumors except for OMM. METHODS Thirty-eight dogs with non-OMM solid tumors were enrolled prospectively and treated with ca-4F12-E6 at 3 mg/kg every 2 weeks of each 10-week treatment cycle. Adverse events (AEs) and treatment efficacy were graded based on the criteria established by the Veterinary Cooperative Oncology Group. RESULTS One dog was withdrawn, and thirty-seven dogs were evaluated for the safety and efficacy of ca-4F12-E6. Treatment-related AEs of any grade occurred in 13 out of 37 cases (35.1%). Two dogs with sterile nodular panniculitis and one with myasthenia gravis and hypothyroidism were suspected of immune-related AEs. In 30 out of 37 dogs that had target tumor lesions, the overall response and clinical benefit rates were 6.9% and 27.6%, respectively. The median progression-free survival and overall survival time were 70 days and 215 days, respectively. CONCLUSIONS The present study demonstrated that ca-4F12-E6 was well-tolerated in non-OMM dogs, with a small number of cases showing objective responses. This provides evidence supporting large-scale clinical trials of anti-PD-1 antibody therapy in dogs.
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Affiliation(s)
- Masaya Igase
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Sakuya Inanaga
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Shoma Nishibori
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Laboratory of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Yuki Nemoto
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Hiro Horikirizono
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kenji Baba
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Satoshi Kambayashi
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Masaru Okuda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Yusuke Sakai
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Masashi Sakurai
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Masahiro Kato
- Nippon Zenyaku Kogyo Co., Ltd., Koriyama, Fukushima 963-0196, Japan
| | - Toshihiro Tsukui
- Nippon Zenyaku Kogyo Co., Ltd., Koriyama, Fukushima 963-0196, Japan
| | - Takuya Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan.
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Nakaichi M, Itamoto T, Nemoto Y, Sunahara H, Itoh H, Itamoto K, Tani K. Osteosarcoma of the hyoid bone in a cat. JFMS Open Rep 2023; 9:20551169231188642. [PMID: 37781726 PMCID: PMC10540576 DOI: 10.1177/20551169231188642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023] Open
Abstract
Case summary A 10-year-old male neutered Abyssinian cat was presented with the chief complaint of a right pharyngeal mass. On palpation, the mass was easily palpable; it appeared well demarcated and mobile, and oval in shape. Radiographic examination showed a radiopaque pharyngeal mass, which was revealed to be a well-demarcated mass lesion with a radiopaque marginal area on CT examination. The inside of the mass was uniformly well enhanced on contrast CT examination. A three-dimensional image reconstructed from the CT images strongly suggested that the mass originated from the right stylohyoid bone. No abnormal lesions were observed in the thoracic and abdominal CT examinations. Surgical excision of the mass was scheduled 3 weeks after the first admission. The mass was bluntly separated from the surrounding musculature and resected together with the ipsilateral epihyoid bone adjacent to the mass. Histopathological examination of the resected mass showed neoplastic cells with osteoid formation, and the mass was histopathologically diagnosed as an osteosarcoma. The postoperative recovery from anaesthesia was uneventful, and the cat began feeding on its own from the third postoperative day. The 3-month postoperative CT evaluation revealed no local recurrence or distant metastasis. The cat showed no abnormal findings at the time of writing (6 months postoperatively). Relevance and novel information Although osteosarcoma derived from the hyoid bone has rarely been reported in the veterinary field, this report suggests that such tumours may occur in cats. In addition, partial excision of the hyoid apparatus seems to be well tolerated in cats.
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Affiliation(s)
- Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Takuya Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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9
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Itamoto K, Itoh H, Sunahara H, Horikirizono H, Nemoto Y, Tani K, Iseri T, Nakaichi M. Comparison of surgical invasiveness between micro-endoscopic discectomy/microscopic discectomy and conventional hemilaminectomy in dogs. J Vet Med Sci 2023. [PMID: 37100630 DOI: 10.1292/jvms.22-0226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023] Open
Abstract
Micro-endoscopic discectomy (MED) or microscopic discectomy (MD) have been performed for disc herniation in humans. The purpose of this study was to compare the invasiveness of the hemilaminectomy in dogs between the approach using a cylindrical retractor for the MED/MD and a conventional open surgical approaches in dogs. First, as preliminary studies, we analyzed the suitability of the cylindrical retractor for the vertebral body of small to medium-sized dogs on the X-ray computed tomographic images using the three-dimensional analysis software, and confirmed that it was possible to open a bone window of an approximate length of 1.72 clto the spinal canal with the cylindrical retractor with a diameter 17 mm using two medium-sized canine cadavers. Next, to determine difference in the invasiveness of hemilaminectomy, the magnitude of tissue damage, surgical stress and postoperative pain were compared between the conventional open approach (hemilaminectomy group: HL group, n=6) and the surgical approach using the cylindrical retractor (MD group, n=6) in 12 beagle dogs. The plasma creatine phosphokinase, C-reactive protein and cortisol concentrations, incision length and University of Melbourne Pain Scale scores after the hemilaminectomy were significantly lower in the MD group than in the HL group. There were no significant differences between the durations of surgery and the other evaluated indices. The approach using the MD can provide a less invasive hemilaminectomy than the conventional approach in dogs.
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Affiliation(s)
- Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Yuki Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University
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10
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Iseri T, Tanabe Y, Onizuka R, Torigoe Y, Horikirizono H, Itamoto K, Sunahara H, Itoh H, Tani K, Nakaichi M. A Monte Carlo study on dose distribution of an orthovoltage radiation therapy system. Phys Eng Sci Med 2023; 46:623-632. [PMID: 36940063 DOI: 10.1007/s13246-023-01237-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 02/23/2023] [Indexed: 03/21/2023]
Abstract
It is important to plan radiotherapy treatment and establish optimal dose distribution to reduce the chances of side effects and injury. Because there are no commercially available tools for calculating dose distribution in orthovoltage radiotherapy in companion animals, we developed an algorithm to accomplish this and verified its characteristics using tumor disease cases. First, we used the Monte Carlo method to develop an algorithm to calculate the dose distribution of orthovoltage radiotherapy (280 kVp; MBR-320, Hitachi Medical Corporation, Tokyo, Japan) using BEAMnrc at our clinic. Using development of Monte Carlo method, dose distribution for tumor and normal organs were evaluated in brain tumors, squamous cell carcinomas of the head, and feline nasal lymphomas. In all cases of brain tumors, the mean dose delivered to the GTV ranged from 36.2 to 76.1% of the prescribed dose due to the decrease through the skull. In the nasal lymphoma in cats, the eyes with covered a 2 mm-thick lead plate, the respective average dose to the eyes was 71.8% and 89.9% less than that to the uncovered eyes. The findings may be useful for informed decision making in orthovoltage radiotherapy with more effective and targeted irradiation and data collection allowing detailed informed consent.
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Affiliation(s)
- Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi, Yamagishi, Japan.
| | - Yoshinori Tanabe
- Graduate School of Health Sciences, Okayama University, Okayama, Japan
| | - Ryouta Onizuka
- Department of Therapeutic Radiology, Yamaguchi University Hospital, Yamaguchi, Japan
| | - Yuri Torigoe
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi, Yamagishi, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi, Yamagishi, Japan
| | - Kazuhito Itamoto
- Animal medical center, Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Animal medical center, Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi, Yamagishi, Japan
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11
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Nemoto Y, Nakaichi M, Sakurai M, Itamoto K, Morimoto M, Horikirizono H, Itoh H, Sunahara H, Tani K. Histiocytic sarcoma with spinal necrosis in a dog with progressing non-ambulatory tetraparesis. Open Vet J 2023; 13:394-399. [PMID: 37026072 PMCID: PMC10072830 DOI: 10.5455/ovj.2023.v13.i3.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/17/2023] [Indexed: 03/30/2023] Open
Abstract
Background:
Histiocytic sarcoma (HS) is an aggressive malignant neoplasm, and widespread metastasis occurs with a fatal outcome. HS involving the central nervous system is relatively uncommon. Spinal cord necrosis, a very rare condition, could be induced by ischemia or infarction. Here, we report a dog progressing non-ambulatory tetraparesis with spinal cord necrosis caused by HS.
Case Description:
A 9-year-old male Labrador retriever was presented with a progressing non-ambulatory tetraparesis. CT imaging revealed lysis of the spinous process of T7 and a ring-shaped lesion surrounding the soft tissue of lung fields. T2-weighted MRI showed the spinous processes of T6 to T8 as hyperintense, and the lesion infiltrated into the T7 vertebra and the spinal cord. After euthanasia, the final diagnosis upon necropsy was HS, which was observed in the lung, spinous process, thoracic cord, and the pulmonary hilar lymph node. Moreover, necrotic spots were spread widely through the thoracic spinal cord.
Conclusion:
This report outlines a case of canine HS in the lung, spinous process, thoracic cord, and pulmonary hilar lymph node. Ischemic deficit and necrosis of the thoracic spinal cord resulted from the compression of perivascular tumor cells, which rapidly led to progressive tetraparesis. Although the diagnosis was difficult, MRI and CT images helped determine the prognosis. To our knowledge, this is the first case report of canine HS with direct spinal cord involvement associated with spinal necrosis.
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Affiliation(s)
- Yuki Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
- Corresponding Author: Yuki Nemoto. Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan. .
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masashi Sakurai
- Department of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masahiro Morimoto
- Department of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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12
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Hasegawa Y, Shosu K, Tsuji K, Shimoyama Y, Miyama TS, Baba K, Okuda M, Itamoto K, Igase M, Mizuno T. Intratumoral heterogeneity of c-KIT mutations in a feline splenic mast cell tumor and their functional effects on cell proliferation. Sci Rep 2022; 12:15791. [PMID: 36138037 PMCID: PMC9499958 DOI: 10.1038/s41598-022-19089-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 08/24/2022] [Indexed: 11/20/2022] Open
Abstract
A cat was presented with mast cell tumors (MCTs) of the skin and spleen. During the initial diagnosis, the exon 8 mutation of c-KIT was detected in the masses from skin and spleen by a commercial laboratory test. Consequently, treatment with toceranib was started. After complete remission, because of recurrence on day 117, the spleen and skin tumors were removed, but the cat eventually died on day 191. The analysis of ten cDNA clones of the c-KIT gene cloned from the surgically removed spleen revealed that seven different cDNA patterns were included, indicating the heterogeneity of this gene in the splenic MCT. The seven cDNA nucleotide patterns can be classified into four protein sequence patterns. In addition to the previously known mutations in exon 8, we identified novel mutations in exons 9, 10, and 18; four amino acids deletion in exon 9, and a point mutation in exons 10 and 18. Mouse IL-3-dependent cell line, Ba/F3, was transduced with these mutant clones, and c-KIT phosphorylation and proliferation assays were performed. We found that certain mutations affected the c-KIT phosphorylation status and cell proliferation. This suggests that heterogeneity among the population of tumor cells exists in MCTs, and that the dominant clones of this heterogeneity may contribute to the subsequent tumor cell growth.
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Affiliation(s)
- Yuki Hasegawa
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuha Shosu
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kanako Tsuji
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | | | - Takako Shimokawa Miyama
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Baba
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masaru Okuda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Laboratory of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masaya Igase
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Takuya Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan.
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13
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Mizuno T, Inoue M, Kubo T, Iwaki Y, Kawamoto K, Itamoto K, Kambayashi S, Igase M, Baba K, Okuda M. Improvement of anemia in five dogs with nonregenerative anemia treated with allogeneic adipose-derived stem cells. Vet Anim Sci 2022; 17:100264. [PMID: 35898238 PMCID: PMC9310121 DOI: 10.1016/j.vas.2022.100264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 10/31/2022] Open
Abstract
Five canine cases with nonregenerative anemia were included in this study. All were treated with allogeneic adipose-derived stem cells (ADSCs). All cases showed improvement of anemia by ADSCs treatment.
Background Objectives Methods Results Conclusions
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14
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Inanaga S, Igase M, Sakai Y, Hagimori K, Sunahara H, Horikirizono H, Itamoto K, Baba K, Ohsato Y, Mizuno T. Relationship of microsatellite instability to mismatch repair deficiency in malignant tumors of dogs. J Vet Intern Med 2022; 36:1760-1769. [PMID: 35959511 PMCID: PMC9511092 DOI: 10.1111/jvim.16454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/10/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Microsatellite instability (MSI) is a type of genomic instability caused by mismatch repair deficiency (dMMR) in tumors. Studies on dMMR/MSI are limited, and the relationship between dMMR and MSI is unknown in tumors of dogs. OBJECTIVES We aimed to identify the frequency of dMMR/MSI by tumor type and evaluate the relationship between dMMR and MSI in tumors of dogs. ANIMALS In total, 101 dogs with 11 types of malignant tumors were included. METHODS We extracted DNA from fresh normal and tumor tissues. Twelve microsatellite loci from both normal and tumor DNA were amplified by PCR and detected by capillary electrophoresis. Each microsatellite (MS) was defined as MSI if a difference in product size between the tumor and normal DNA was detected. The dMMR was evaluated by immunohistochemistry with formalin-fixed paraffin-embedded tumor tissues. Next, we confirmed whether dMMR induces MSI by serial passaging of MMR gene knockout cell lines for 3 months. RESULTS Microsatellite instability was detected frequently in oral malignant melanoma. The number of MSI-positive markers was higher in cases with dMMR than in those with proficient MMR (P < .0001). Statistical analysis indicated that the occurrence of MSI in FH2305 might have relevance to dMMR. Furthermore, MSI occurred in dMMR cell lines 3 months after passaging. CONCLUSIONS AND CLINICAL IMPORTANCE Microsatellite instability and dMMR more frequently were found in oral malignant melanoma than in other tumors, and dMMR has relevance to MSI in both clinical cases and cell lines.
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Affiliation(s)
- Sakuya Inanaga
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Masaya Igase
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yusuke Sakai
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Hiroshi Sunahara
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiro Horikirizono
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Laboratory of Companion Animal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Baba
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | | | - Takuya Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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15
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Itoh H, Igari K, Tani K, Sunahara H, Nemoto Y, Nakaichi M, Iseri T, Horikirizono H, Itamoto K. Clinical relationship between histopathological necrotic/partial necrotic findings and disease condition of gallbladder mucoceles in dogs. Pol J Vet Sci 2022; 25:223-229. [PMID: 35861958 DOI: 10.24425/pjvs.2022.141806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Gallbladder mucocele (GM) is a common extrahepatic biliary disease recognized in dogs and is defined as the expansion and extension of the gallbladder by an accumulation of semi-solid bile or bile acid. Histopathological diagnosis of necrotizing cholecystitis and transmural coagulative necrosis of the gallbladder wall shows poor prognosis. Conversely, histopathological diagnosis with partial necrotic findings is often achieved. We hypothesized that histopathological partial necrosis of the gallbladder wall is the primary lesion of necrotic cholecystitis or transmural ischemic necrosis. Therefore, we investigated the relationship between histopathological necrosis/ partial necrosis findings and their clinical conditions. We retrospectively analyzed 55 dogs diagnosed with GM that had undergone cholecystectomy at the Yamaguchi University Animal Medical Center. The group with histopathological necrosis/partial necrosis of the gallbladder wall showed elevated levels of preoperative white blood cells, alanine transaminase, alkaline phosphatase, γ-glutamyltransferase, total bilirubin, and C-reactive protein compared to the non-necrotic group. Partial necrosis of the gallbladder wall may affect the progression of the disease and hematological abnormalities. Additionally, all death cases until 2 weeks were included in the histopathological necrosis/partial necrosis group. In this study, we found that poor prognosis factors were associated with partial necrosis of the gallbladder wall. Furthermore, these cases of partial necrosis showed elevated levels of blood test parameters. These results suggest that necrosis of the gallbladder wall is associated with poor prognosis and poor pathophysiological conditions.
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Affiliation(s)
- H Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
| | - K Igari
- Pet Clinic Hallelujah, 2544-1 Nakabaru, Kasuya, Kasuya-gun, Fukuoka 811-2304, Japan
| | - K Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
| | - H Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
| | - Y Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
| | - M Nakaichi
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - T Iseri
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - H Horikirizono
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - K Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
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16
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Nakaichi M, Iseri T, Horikirizono H, Itoh H, Sunahara H, Nemoto Y, Itamoto K, Tani K. Pedigree study of the heredity of copper-associated hepatitis in Dalmatians in Japan. Can Vet J 2022; 63:633-636. [PMID: 35656524 PMCID: PMC9112360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The pedigrees of 3 Dalmatian dogs afflicted with copper-associated hepatitis were investigated to discover the mode of inheritance. A composite family pedigree showed that the 3 affected Dalmatians were related. None of the parents of the affected dogs showed clinical symptoms of liver disease, and the disease had no sex predisposition. The estimated segregation ratio was approximately 3:1 based on surviving littermates. These findings suggested that the copper-associated hepatitis in these Dalmatians was an autosomal recessive mode of inheritance. In addition, some male Dalmatians imported from abroad might have been involved in the occurrence of this disease in Japan.
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Affiliation(s)
- Munekazu Nakaichi
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Harumichi Itoh
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Yuki Nemoto
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Department of Veterinary Radiology (Nakaichi, Iseri, Horikirizono), Department of Veterinary Small Animal Clinical Science (Itoh, Itamoto), Department of Veterinary Surgery (Sunahara, Nemoto, Tani), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
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Iseri T, Horikirizono H, Abe M, Itoh H, Sunahara H, Nemoto Y, Itamoto K, Tani K, Nakaichi M. Outcomes of megavoltage radiotherapy for canine intranasal tumors and its relationship to clinical stages. Open Vet J 2022; 12:383-390. [PMID: 35821780 PMCID: PMC9270932 DOI: 10.5455/ovj.2022.v12.i3.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/16/2022] [Indexed: 11/08/2022] Open
Abstract
Background: Radiation therapy is considered important for the treatment of intranasal tumors in dogs and is believed to be essential for prolonging their survival. Aim: To investigate the contribution of clinical staging to improve outcomes of megavoltage radiotherapy for canine intranasal tumors. Methods: A total of 123 dogs with intranasal tumors were included in the study. Forty-eight dogs received orthovoltage radiotherapy after cytoreductive surgery (Group I), 21 received orthovoltage radiotherapy without surgery (Group II), and 54 received megavoltage radiotherapy without surgery (Group III). All cases in each group were classified into clinical stages 1–4, and the median survival time (MST) was compared for each stage in all groups. Results: The overall MST was not significantly difference among Group I (325 days), Group II (317 days), and Group III (488 days); however, Group III was prolonged than Groups I and II. The MSTs for stages 1, 2, 3, and 4 were 597, 361, 267, and 325 days in Group I; 633, 260, 233, and 329 days in Group II; and 931, 860, 368, and 176 days in Group III, respectively. The MST for stage 2 cases in Group III was significantly prolonged when compared with that in Groups I and II; no significant difference was observed at other stages; however, the MST in Group III was longer in stage 1. These results showed that megavoltage radiotherapy prolonged the MST in dogs with intranasal tumors when compared to orthovoltage radiation with or without cytoreductive surgery, and that improvements in MST at stage 2 contributed significantly to this. Conclusion: The improvement in the MST in dogs with stages 1 and 2 intranasal tumors highlights the importance of starting megavoltage radiotherapy in the early stages.
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Affiliation(s)
- Toshie Iseri
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
- Corresponding Author: Toshie Iseri. Joint Faculty of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-City, Yamaguchi, 753-8515, Japan.
| | - Hiro Horikirizono
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Momoko Abe
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
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Iseri T, Hira N, Tanabe Y, Horikirizono H, Sunahara H, Itoh H, Nemoto Y, Itamoto K, Tani K, Nakaichi M. Evaluation of setup errors of immobilization device for radiation therapy in companion animals. Open Vet J 2022; 12:929-935. [PMID: 36650854 PMCID: PMC9805779 DOI: 10.5455/ovj.2022.v12.i6.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 11/01/2022] [Indexed: 12/26/2022] Open
Abstract
Background Intensity-modulated radiotherapy (IMRT), which allows generating steep dose gradients, is a beneficial treatment for companion animals with adjacent target and risk organs. IMRT is essential for high setup accuracy for avoiding overdose to risk organs, and optimal radiotherapy is important for evaluating the setup accuracy of companion animals. Aim To use an immobilization device to evaluate setup errors in radiotherapy for companion animals. Methods We calculated setup errors in radiotherapy for 386 animals (dogs and cats; 3,261 registration images) that underwent radiotherapy between 2016 and 2022. The companion animals were immobilized with a customized bite block and vacuum lock device. A quantile-quantile plot with 95% confidence interval (CI) was used to evaluate the histogram of the setup errors, and the systematic and random setup errors were calculated for each region (brain, head and neck, chest and abdomen, pelvis, and spine). Results The setup error in each direction presented an extremely narrow-interval histogram, with the following lower and upper 95% CIs: cranial-caudal (-0.08, -0.06 cm); left-right (-0.04, -0.02 cm); and dorsal-ventral (-0.13, -0.11 cm). The mean systematic setup error was 0.16 cm (range: 0.12-0.36 cm), and the random error was 0.15 cm (range: 0.08-0.34 cm). The pelvis showed the highest systematic and random setup errors (mean: 0.36 and 0.23 cm, respectively). Conclusion The use of an immobilization device enables highly accurate radiotherapy for companion animals (95% CI < 0.15 cm).
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Affiliation(s)
- Toshie Iseri
- Faculty of Agriculture, Animal Medical Emergency Center, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Nanami Hira
- Facilty of Health Sciences, Okayama University Medical School, Okayama, Japan
| | - Yoshinori Tanabe
- Faculty of Medicine, Graduate School of Health Sciences, Okayama University, Okayama, Japan,Corresponding Author: Yoshinori Tanabe. Faculty of Medicine, Graduate School of Health Sciences, Okayama University, Okayama, Japan.
| | - Hiro Horikirizono
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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Nakaichi M, Iseri T, Horikirizono H, Itoh H, Sunahara H, Nemoto Y, Itamoto K, Tani K. A long survival case of spinal nephroblastoma in a dog. Open Vet J 2022; 12:188-191. [PMID: 35603077 PMCID: PMC9109834 DOI: 10.5455/ovj.2022.v12.i2.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Dogs’ nephroblastoma of the spinal cord is a rare neoplastic disease, with few reports of long-term survival after surgery. We experienced that surgical treatment with postoperative radiation therapy for spinal nephroblastoma in a dog resulted in the long-term survival of 11 years. Case Description: The patient presented to our veterinary hospital because of progressive hindlimb paralysis. Based on diagnostic imaging, she was diagnosed with a thoracolumbar spinal cord tumor and was treated with surgery. The gross tumor tissue was removed after laminectomy, followed by postoperative radiation therapy using orthovoltage equipment. The histopathological features of the surgical specimen were consistent with those of previously reported spinal nephroblastoma, although infrequent mitotic figures were observed. The dog recovered well after treatment and resumed her normal walking condition. No tumor recurrence was observed on periodic follow-up magnetic resonance imaging performed 10 and 21 months after surgery. Imaging evaluation for the gradual development of hindlimb weakness was performed 9 years after surgery; however, no recurrence of tumor tissue was observed, and spondylosis deformans, probably induced after laminectomy, were identified as a possible cause. The dog died of aspiration pneumonia 11 years after surgery, independent of spinal nephroblastoma. Conclusion: To date, no clinical cases of canine spinal cord primary nephroblastoma that survived for 11 years after surgery have been reported. This case strongly suggests that providing intensive treatment for canine spinal nephroblastoma is very important.
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Affiliation(s)
- Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
- Corresponding Author: Munekazu Nakaichi. Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
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20
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Iseri T, Tanabe Y, Horikirizono H, Sunahara H, Itoh H, Nemoto Y, Itamoto K, Tani K, Tanaka H, Nakaichi M. Adjustment of multi-leaf collimator parameters in 4-MV and 6-MV IMRT: A study of veterinary clinical cases. Open Vet J 2022; 12:407-413. [PMID: 35821783 PMCID: PMC9270939 DOI: 10.5455/ovj.2022.v12.i3.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 05/25/2022] [Indexed: 11/06/2022] Open
Abstract
Background: For optimal treatment, it is important to maintain optimal multi-leaf collimator (MLC) transmission in intensity-modulated radiation therapy (IMRT). However, adjustment of transmissions has not been reported in veterinary medicine. Aim: To demonstrate that appropriate MLC parameter adjustment for IMRT using 4- and 6-MV energy can reduce the need for quality assurance revalidation in real companion animal clinical cases. Methods: The MLC parameters (leaf transmission and leaf offset) of the treatment planning system were adjusted by evaluating seven plans (10 × 10 cm, 3ABUT, DMLC, 7segA, FOURL, HDMLC, and HIMRT) and 20 preclinical cases (10 cases each in 4- and 6-MV groups). Subsequently, 101 IMRT plans of 88 cases (77 dogs and 11 cats) were evaluated for absolute dose of plan target volume (PTV) and organs at risk (OAR) and were analyzed for the relative dose distribution by gamma analysis (3%/3 mm, >10%) using EBT3 film. Results: After adjustment of the MLC parameters (leaf transmission and leaf offset, 4 MV: 0.008 and 0, 6 MV: 0.005 and 0, respectively), the data from 101 plans (4 MV: 64 plans and 6 MV: 37 plans) treated with IMRT showed PTV <3%, OAR <5%, and gamma analysis pass rates ≥95% in all cases. Conclusion: Clinically meaningful dose distributions can be created even with a limited validation device if the treatment parameters are adjusted appropriately, even for tumors in canines and felines, where the irradiation field is small, the target is adjacent to the OAR, and the target is often superficial.
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Affiliation(s)
- Toshie Iseri
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Yoshinori Tanabe
- Faculty of Medicine, Graduate School of Health Sciences, Okayama University, Okayama, Japan
- Corresponding Author: Yoshinori Tanabe. Faculty of Medicine, Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho, 2-chome, Kita-ku, Okayama, 700-8558, Japan.
| | - Hiro Horikirizono
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Hiroshi Sunahara
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Harumichi Itoh
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Yuki Nemoto
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Kazuhito Itamoto
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Kenji Tani
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
| | - Hidekazu Tanaka
- Faculty of Medicine and Health Sciences, Yamaguchi University, 1-1-1 Minami-Kogushi, Ube-shi, Japan
| | - Munekazu Nakaichi
- Joint faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Japan
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21
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Nakasumi K, Yamamoto N, Takami T, Itoh H, Itamoto K, Horikirizono H, Iseri T, Nakaichi M, Nemoto Y, Sunahara H, Tani K. Effect of drug-eluting bead transarterial chemoembolization loaded with cisplatin on normal dogs. J Vet Med Sci 2021; 84:114-120. [PMID: 34866073 PMCID: PMC8810336 DOI: 10.1292/jvms.21-0396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Transcatheter arterial embolization (TAE) and transcatheter arterial chemoembolization (TACE) are standard treatments for advanced hepatocellular carcinoma (HCC) and particularly for unresectable tumors or liver metastases in humans. However, reports on TACE used in veterinary medicine are few. This study aimed to evaluate the feasibility and safety of drug-eluting bead transarterial chemoembolization (DEB-TACE). We performed DEB-TACE in four clinically normal dogs and pharmacokinetically compared the results against hepatic arterial infusion (HAI) of cisplatin in two dogs. Drug-eluting beads (DEB) loaded with cisplatin were injected through a microcatheter for selective embolization of the left hepatic artery. After embolization, computed tomography (CT) images and histological examination findings were obtained during a 4-week observation period. Serum platinum concentrations were measured to evaluate cisplatin after each procedure. Biochemical analysis was performed during a 12-week observation period. Embolization was successful in all dogs, and there were no clinically apparent abnormalities. Embolization was confirmed up to 4 weeks after DEB-TACE in two of the four dogs and up to 1 week in the other two dogs using postoperative CT images. Cisplatin was not detected in peripheral veins in all dogs after DEB-TACE, but it was detected in trace amounts after HAI. DEB-TACE using cisplatin was safe and well tolerated by normal dogs. DEB-TACE may be useful in terms of determining systemic toxicity and drug concentration within tumors.
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Affiliation(s)
- Ko Nakasumi
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Naoki Yamamoto
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University
| | - Taro Takami
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University
| | - Harumichi Itoh
- Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Kazuhito Itamoto
- Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Yuki Nemoto
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Hiroshi Sunahara
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
| | - Kenji Tani
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University
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22
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Sunahara H, Tani K, Nemoto Y, Itamoto K, Itoh H, Nakaichi M, Iseri T, Horikirizono H. Transient third-degree atrioventricular block during anesthesia in a cat. Open Vet J 2021; 11:662-666. [PMID: 35070861 PMCID: PMC8770184 DOI: 10.5455/ovj.2021.v11.i4.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 10/17/2021] [Indexed: 12/03/2022] Open
Abstract
Background: Third-degree atrioventricular block (AVB) is usually permanent, with transient cases being rare. Cats with transient third-degree AVB. It had been not reported in detail. Case Description: A 9.3-year-old, male shorthair cat was evaluated for possible nervous disease resulting from otitis interna. Under propofol and isoflurane anesthesia, this cat developed a third-degree AVB. Isoproterenol was administered by continuous infusion to increase its heart rate. During recovery, heart rate returned to sinus bradycardia together with first-degree AVB without medical treatment. The cause of transient AVB was not observed at the examination. Conclusion: The case of this cat suggests that anesthesia can result in a transient third-degree AVB.
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Affiliation(s)
- Hiroshi Sunahara
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kenji Tani
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Harumichi Itoh
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Munekazu Nakaichi
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Toshie Iseri
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Hiro Horikirizono
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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Abstract
The DNA mismatch repair (MMR) system preserves genomic stability by identifying and repairing mismatched nucleotides in the DNA replication process. The dysfunction of the MMR system, also known as mismatch repair deficiency (dMMR), is implicated as a predictive biomarker for the efficacy of immune checkpoint blockade therapy regardless of the tumor type in humans. This study aimed to evaluate the immunolabeling of MMR proteins in canine tumors and to identify the types of tumors having dMMR. First, we performed immunohistochemistry in 8 different canine tumors (oral malignant melanoma, high-to-intermediate grade lymphoma, mast cell tumor, malignant mammary gland tumor, urothelial carcinoma, hepatocellular carcinoma, osteosarcoma, and hemangiosarcoma) with 15 samples each to analyze the immunolabeling of canine mismatch repair proteins (MSH2, MSH6, and MLH1) using anti-human monoclonal antibodies. We found that more than half of canine oral malignant melanoma (60%) and hepatocellular carcinoma (53%) samples and fewer of the other canine tumors had loss of immunolabeling in ≥1 MMR protein (ie, evidence of defective MMR proteins, based on the definition of dMMR in the humans). Antibodies against human MSH2, MSH6, and MLH1 were cross-reactive with the corresponding canine protein as confirmed using MMR gene knockout canine cell lines. Further studies are required to investigate the clinical outcomes in canine spontaneous tumors with dMMR to determine the potential for immune checkpoint blockade therapy for these tumor types.
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Affiliation(s)
| | | | | | - Mika Tanabe
- Veterinary Pathology Diagnostic Center, Fukuoka, Japan
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Itoh H, Tani K, Sunahara H, Nakaichi M, Iseri T, Horikirizono H, Itamoto K. Sphere-forming cells display stem cell-like characteristics and increased xCT expression in a canine hepatocellular carcinoma cell line. Res Vet Sci 2021; 139:25-31. [PMID: 34246940 DOI: 10.1016/j.rvsc.2021.06.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/24/2022]
Abstract
Hepatocellular carcinoma (HCC) is the most common type of canine primary liver tumor; however, most chemotherapies against HCC are ineffective due to resistance to anticancer agents. Sphere-forming cells are considered to act as cancer stem cells for various types of solid tumors and have been established for many canine tumor cell lines, yet no studies have reported sphere-forming cells for canine HCC. In this study, we established sphere-forming cells from a canine HCC cell line (AZACH). These cells displayed increased stem cell marker mRNA expression (Nanog, Sox2, c-Myc, and Klf4), aldehyde dehydrogenase activity, and chemoresistance against mitoxantrone, gemcitabine, and doxorubicin. In addition, sphere-forming cells exhibited higher xCT expression and lower intracellular reactive oxygen species levels than adherent cells. Treatment with sulfasalazine, a xCT-specific inhibitor, reduced sphere formation efficiency. Together, these results indicate that sphere-forming cells derived from a canine HCC cell line have similar characteristics to cancer stem cells and that their increased xCT expression and associated resistance to oxidative stress contribute toward sphere formation.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Japan
| | - Toshie Iseri
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Japan
| | - Hiro Horikirizono
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan.
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25
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Nakaichi M, Iseri T, Horikirizono H, Komine M, Itoh H, Sunahara H, Nemoto Y, Itamoto K, Tani K. Copper-associated hepatitis in a young Dalmatian dog in Japan. J Vet Med Sci 2021; 83:911-915. [PMID: 33840721 PMCID: PMC8267186 DOI: 10.1292/jvms.21-0061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
A male 25-month-old Dalmatian dog attended our veterinary hospital because of anorexia and high circulating liver enzyme activities. Abdominal computed
tomography showed a slightly small liver with rounded edges, and laparoscopic examination showed that the liver was yellowish. Histopathological examination
revealed multifocal necrosis of hepatocytes and severe chronic hepatitis. Rhodanine staining showed severe copper accumulation in hepatocytes and a quantitative
analysis of the copper content of the liver showed substantial accumulation (10.3 mg/g dry mass), suggesting a diagnosis of copper-associated hepatitis.
Previously reported canine mutation in the COMMD1, the gene responsible for the copper-associated hepatitis in the Bedlington terrier, was not
identified. To our knowledge, this is the first report of copper-associated hepatitis in a Dalmatian in Japan.
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Affiliation(s)
- Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Misa Komine
- IDEXX Laboratories K.K., Koganei, Tokyo 184-8515, Japan
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Yuki Nemoto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
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Baba S, Kawaguchi K, Itamoto K, Watanabe T, Hayashida M, Mae T, Nakashima Y, Kato G. Use of an inertial measurement unit sensor in pedicle screw placement improves trajectory accuracy. PLoS One 2020; 15:e0242512. [PMID: 33196657 PMCID: PMC7668595 DOI: 10.1371/journal.pone.0242512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 11/03/2020] [Indexed: 12/02/2022] Open
Abstract
Ascertaining the accuracy of the pedicle screw (PS) trajectories is important as PS malpositioning can cause critical complications. We aimed to determine the angle range over which estimation is unreliable; build a low-cost PS placement support system that uses an inertial measurement unit (IMU) to enable the monitoring of surgical tools and PS trajectories, and determine the situations where IMU support would be most beneficial. In PS insertion experiments, we used cadaver samples that included lumbar porcine spines. Computed tomography images obtained before and after PS insertion were viewed. Offsets between the planned and implanted PS trajectories in the freehand and IMU-assisted groups were analyzed. The PS cortical bone breaches were classified according to the Gertzbein and Robbins criteria (GRC). Added head-down tilted sample experiments were repeated wherein we expected a decreased rostro-caudal rotational accuracy of the PS according to the angle estimation ability results. Evaluation of the PS trajectory accuracy revealed no significant advantage of IMU-assisted rostro-caudal rotational accuracy versus freehand accuracy. According to the GRC, IMU assistance significantly increased the rate of clinically acceptable PS positions (RoCA) than the freehand technique. In the head-down tilted sample experiments, IMU assist provided increased accuracies with both rostro-caudal and medial rotational techniques when compared with the freehand technique. In the freehand group, RoCA was significantly decreased in samples with rostral tilting relative to that in the samples without. However, In the IMU-assisted group, no significant difference in RoCA between the samples with and without head-down tilting was observed. Even when the planned PS medial and/or rostro-caudal rotational angle was relatively large and difficult to reproduce manually, IMU-support helped maintain the PS trajectory accuracy and positioning safety. IMU assist in PS placement was more beneficial, especially for larger rostro-caudal and/or medial rotational pedicle angles.
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Affiliation(s)
- Satoshi Baba
- Department of Spine Surgery, Saga Medical Center, Koseikan, Saga, Japan
- Trauma Center, Saga Medical Center, Koseikan, Saga, Japan
- Department of Orthopedic Surgery, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Kenichi Kawaguchi
- Department of Orthopedic Surgery, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Takeshi Watanabe
- Department of Orthopedic Surgery, Watanabe Orthopedic Hospital, Itoshima, Fukuoka, Japan
| | - Mitsumasa Hayashida
- Department of Spine Surgery, Saga Medical Center, Koseikan, Saga, Japan
- Trauma Center, Saga Medical Center, Koseikan, Saga, Japan
- Department of Orthopedic Surgery, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Takao Mae
- Trauma Center, Saga Medical Center, Koseikan, Saga, Japan
- Department of Orthopedic Surgery, Saga Medical Center, Koseikan, Saga, Japan
| | - Yasuharu Nakashima
- Department of Orthopedic Surgery, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Go Kato
- Department of Spine Surgery, Saga Medical Center, Koseikan, Saga, Japan
- Trauma Center, Saga Medical Center, Koseikan, Saga, Japan
- Department of Orthopedic Surgery, Fukuoka Red Cross Hospital, Fukuoka, Japan
- * E-mail:
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Nakaichi M, Iseri T, Horikirizono H, Sakai Y, Itoh H, Sunahara H, Itamoto K, Tani K. Clinical features and their course of pituitary carcinoma with distant metastasis in a dog. J Vet Med Sci 2020; 82:1671-1675. [PMID: 33028750 PMCID: PMC7719888 DOI: 10.1292/jvms.20-0500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
An 11-year-old male toy poodle with neurological symptoms was diagnosed with a macroscopic pituitary tumor, which produced adrenocorticotropic hormone. Radiation therapy with a linear accelerator was performed for the pituitary tumor, and resulted in good local tumor control. However, serum endogenous adrenocorticotropic hormone concentrations were uncontrollable even after the tumor disappeared. Abdominal computed tomography revealed splenic masses, and splenectomy was performed. Histopathological examination of the surgical specimen showed tumor cells with eosinophilic and finely granular cytoplasm suggestive of endocrine origin. Since these cells were positive for adrenocorticotropic hormone, the case was diagnosed as a pituitary carcinoma with distant metastasis. Necropsy revealed multiple metastases to the abdominal organs. This is the first case report describing canine pituitary carcinoma with distant metastasis.
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Affiliation(s)
- Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Hiro Horikirizono
- Department of Veterinary Radiology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Yusuke Sakai
- Department of Veterinary Pathology, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Harumichi Itoh
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Department of Veterinary Small Animal Clinical Science, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Science, Yamaguchi University, Yamaguchi-shi, Yamaguchi 753-8515, Japan
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Itoh H, Nishikawa S, Tani K, Sunahara H, Nakaichi M, Iseri T, Taura Y, Itamoto K. Cystine transporter expression is a marker to identify a subpopulation of canine adipose-derived stem cells. J Vet Med Sci 2020; 82:713-720. [PMID: 32269196 PMCID: PMC7324832 DOI: 10.1292/jvms.19-0373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Adipose-derived stem cells (ADSCs) are promising cell sources for regenerative medicine
due to the simplicity of their harvest and culture; however, their biological properties
are not completely understood. Moreover, recent murine and human studies identified
several functional subpopulations of ADSCs varying in differentiation potential; however,
there is a lack of research on canine ADSCs. Cystine transporter (xCT) is a stem cell
marker in gastric and colon cancers that interacts with CD44 to enhance cystine uptake
from the cell surface and subsequently accelerates intercellular glutathione levels. In
this study, we identified a ~5% functional subpopulation of canine ADSCs with
xCT+ expression (xCTHi). Compared with those of the
xCT− subpopulation (xCTLo), the xCTHi subpopulation
showed a significantly higher proliferation rate, higher expression of conventional stem
cell markers (SOX2, KLF4, and c-Myc),
and higher expression of adipogenic markers (FABP4 and
PPARγ). By contrast, the xCTLo subpopulation showed
significantly higher expression of osteogenic markers (BMP1 and
SPP) than xCTHi cells. These results suggest xCT as a
candidate marker for detecting a functional subpopulation of canine ADSCs.
Mechanistically, xCT could increase the adipogenic potential while decreasing the
osteogenic differentiation potential, which could serve as a valuable target marker in
regenerative veterinary medicine.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Shimpei Nishikawa
- Department of Medical Data Science, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
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Nakasumi K, Sunahara H, Igari K, Itoh H, Itamoto K, Yamamoto N, Ishikawa T, Takami T, Sakaida I, Taura Y, Tani K. Effect of transcatheter arterial embolisation in normal canine liver using trisacryl gelatine microspheres (Embosphere). Res Vet Sci 2020; 129:174-177. [PMID: 32036125 DOI: 10.1016/j.rvsc.2020.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/19/2020] [Accepted: 01/22/2020] [Indexed: 10/25/2022]
Abstract
The effect of selective transcatheter arterial embolisation (TAE) using trisacryl gelatine microspheres (TGMs) in the normal canine liver was investigated. Selective embolisation was achieved by injecting TGMs into the left hepatic artery through a microcatheter in four healthy dogs. After embolisation, computed tomography (CT), biochemical analysis and histological examination were performed during a 12-week observation period. Embolisation was successful in all four dogs. Postoperative CT revealed consistent embolisation of the artery within the experimental period in three dogs. Hepatic enzyme levels slightly increased after embolisation but tapered to normal ranges. Histological examinations revealed no abnormal changes. Thus, selective TAE with TGMs was well tolerated in normal dogs and may be applicable to canine hepatocellular carcinoma.
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Affiliation(s)
- Ko Nakasumi
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Hiroshi Sunahara
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kazuaki Igari
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Harumichi Itoh
- Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Naoki Yamamoto
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Tsuyoshi Ishikawa
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Taro Takami
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Isao Sakaida
- Department of Gastroenterology & Hepatology, Yamaguchi University Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Yasuho Taura
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Departments of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 1677-1 Yoshida, Yamaguchi 753-8515, Japan.
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Oishi Y, Tani K, Itamoto K, Haraguchi T, Taura Y. Agenesis of hepatic lobes in a dog. Open Vet J 2019; 8:485-488. [PMID: 30775289 PMCID: PMC6356100 DOI: 10.4314/ovj.v8i4.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 11/30/2018] [Indexed: 11/17/2022] Open
Abstract
Agenesis of a hepatic lobe is an extremely rare congenital anomaly and only one dog have been reported in veterinary literature. We encountered a dog with this anomaly diagnosed by Computed tomography (CT) and portography. A two-year-old, 6.9-kg female Shih tzu dog was presented with vomiting and anorexia. The dog had no history of abdominal surgery or trauma. Biochemical analysis showed elevated plasmatic liver enzymes. CT revealed the absence of the liver parenchyma and vascular system of the left lobe, quadrate lobe and papillary process of the caudate lobe. A portosystemic shunt was also observed. The liver parenchyma and vascular system of these lobes were not detected under digital subtraction angiography during laparotomy. Furthermore, the liver parenchyma and vascular system of these lobes were not detected even when the remaining liver volume increased two months after treating the shunt vessel. CT proved itself a good option for antemortally diagnosis of hepatic agenesis in a dog.
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Affiliation(s)
- Yasuhisa Oishi
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
| | - Kazuhito Itamoto
- Department of Animal Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
| | - Tomoya Haraguchi
- Department of Animal Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
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31
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Usui T, Sakurai M, Nishikawa S, Umata K, Nemoto Y, Haraguchi T, Itamoto K, Mizuno T, Noguchi S, Mori T, Iwai S, Nakagawa T, Yamawaki H, Ohama T, Sato K. Establishment of a dog primary prostate cancer organoid using the urine cancer stem cells. Cancer Sci 2017; 108:2383-2392. [PMID: 29024204 PMCID: PMC5715251 DOI: 10.1111/cas.13418] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/30/2017] [Accepted: 10/02/2017] [Indexed: 12/17/2022] Open
Abstract
Dog spontaneously develop prostate cancer (PC) like humans. Because most dogs with PC have a poor prognosis, they could be used as a translational model for advanced PC in humans. Stem cell‐derived 3‐D organoid culture could recapitulate organ structures and physiology. Using patient tissues, a human PC organoid culture system was established. Recent study has shown that urine cells also possess the characteristic of stem cells. However, urine cell‐derived PC organoids have never been produced. Therefore, we generated PC organoids using the dog urine samples. Urine organoids were successfully generated from each dog with PC. Each organoid showed cystic structures and resembled the epithelial structures of original tissues. Expression of an epithelial cell marker, E‐cadherin, and a myofibloblast marker, α‐SMA, was observed in the urine organoids. The organoids also expressed a basal cell marker, CK5, and a luminal cell marker, CK8. CD49f‐sorted basal cell organoids rapidly grew compared with CD24‐sorted luminal cell organoids. The population of CD44‐positive cells was the highest in both organoids and the original urine cells. Tumors were successfully formed with the injection of the organoids into immunodeficient mice. Treatment with a microtubule inhibitor, docetaxel, but not a cyclooxygenase inhibitor, piroxicam, and an mTOR inhibitor, rapamycin, decreased the cell viability of organoids. Treatment with a Hedgehog signal inhibitor, GANT61, increased the radiosensitivity in the organoids. These findings revealed that PC organoids using urine might become a useful tool for investigating the mechanisms of the pathogenesis and treatment of PC in dogs.
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Affiliation(s)
- Tatsuya Usui
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Masashi Sakurai
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Shimpei Nishikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Koji Umata
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Yuki Nemoto
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Tomoya Haraguchi
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Takuya Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Shunsuke Noguchi
- Laboratory of Veterinary Radiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, Japan
| | - Takashi Mori
- Laboratory of Veterinary Clinical Oncology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Satomi Iwai
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Japan
| | - Takayuki Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Japan
| | - Takashi Ohama
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Koichi Sato
- Laboratory of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
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Hwang CC, Igase M, Sakurai M, Haraguchi T, Tani K, Itamoto K, Shimokawa T, Nakaichi M, Nemoto Y, Noguchi S, Coffey M, Okuda M, Mizuno T. Oncolytic reovirus therapy: Pilot study in dogs with spontaneously occurring tumours. Vet Comp Oncol 2017; 16:229-238. [PMID: 29076241 DOI: 10.1111/vco.12361] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/17/2017] [Accepted: 09/18/2017] [Indexed: 12/26/2022]
Abstract
Oncolytic virotherapy is a novel treatment involving replication-competent virus in the elimination of cancer. We have previously reported the oncolytic effects of reovirus in various canine cancer cell lines. This study aims to establish the safety profile of reovirus in dogs with spontaneously occurring tumours and to determine a recommended dosing regimen. Nineteen dogs with various tumours, mostly of advanced stages, were treated with reovirus, ranging from 1.0 × 108 to 5.0 × 109 TCID50 given as intratumour injection (IT) or intravenous infusion (IV) daily for up to 5 consecutive days in 1 or multiple treatment cycles. Adverse events (AEs) were graded according to the Veterinary Cooperative Oncology Group- Common Terminology Criteria for Adverse Events (VCOG-CTCAE) v1.1 guidelines. Viral shedding, neutralizing anti-reovirus antibody (NARA) production and immunohistochemical (IHC) detection of reovirus protein in the tumours were also assessed. AE was not observed in most dogs and events were limited to Grade I or II fever, vomiting, diarrhoea and inflammation of the injected tumour. No infectious virus was shed and all dogs had elevated NARA levels post-treatment. Although IHC results were only available in 6 dogs, 4 were detected positive for reovirus protein. In conclusion, reovirus is well-tolerated and can be given safely to tumour-bearing dogs according to the dosing regimen used in this study without significant concerns of viral shedding. Reovirus is also potentially effective in various types of canine tumours.
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Affiliation(s)
- C C Hwang
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Igase
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Sakurai
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - T Haraguchi
- Laboratory of Small Animal Clinical Science (Surgical Division), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - K Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - K Itamoto
- Laboratory of Small Animal Clinical Science (Surgical Division), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - T Shimokawa
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - M Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Y Nemoto
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - S Noguchi
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Coffey
- Oncolytics Biotech Inc, Calgary, Canada
| | - M Okuda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan.,Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - T Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.,Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
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Itoh H, Nishikawa S, Haraguchi T, Arikawa Y, Eto S, Hiyama M, Iseri T, Itoh Y, Nakaichi M, Sakai Y, Tani K, Taura Y, Itamoto K. Aldehyde dehydrogenase activity helps identify a subpopulation of murine adipose-derived stem cells with enhanced adipogenic and osteogenic differentiation potential. World J Stem Cells 2017; 9:179-186. [PMID: 29104736 PMCID: PMC5661130 DOI: 10.4252/wjsc.v9.i10.179] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/11/2017] [Accepted: 09/13/2017] [Indexed: 02/07/2023] Open
Abstract
AIM To identify and characterize functionally distinct subpopulation of adipose-derived stem cells (ADSCs).
METHODS ADSCs cultured from mouse subcutaneous adipose tissue were sorted fluorescence-activated cell sorter based on aldehyde dehydrogenase (ALDH) activity, a widely used stem cell marker. Differentiation potentials were analyzed by utilizing immunocytofluorescece and its quantitative analysis.
RESULTS Approximately 15% of bulk ADSCs showed high ALDH activity in flow cytometric analysis. Although significant difference was not seen in proliferation capacity, the adipogenic and osteogenic differentiation capacity was higher in ALDHHi subpopulations than in ALDHLo. Gene set enrichment analysis revealed that ribosome-related gene sets were enriched in the ALDHHi subpopulation.
CONCLUSION High ALDH activity is a useful marker for identifying functionally different subpopulations in murine ADSCs. Additionally, we suggested the importance of ribosome for differentiation of ADSCs by gene set enrichment analysis.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Shimpei Nishikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Tomoya Haraguchi
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Yu Arikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Shotaro Eto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Masato Hiyama
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Yoshiki Itoh
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Yusuke Sakai
- Department of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8511, Japan
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Haraguchi T, Kimura S, Itoh H, Nishikawa S, Hiyama M, Tani K, Iseri T, Itoh Y, Nakaichi M, Taura Y, Itamoto K. Comparison of postoperative pain and inflammation reaction in dogs undergoing preventive laparoscopic-assisted and incisional gastropexy. J Vet Med Sci 2017; 79:1524-1531. [PMID: 28717065 PMCID: PMC5627322 DOI: 10.1292/jvms.17-0103] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
This study compared the effects of postoperative pain and inflammation reaction after preventive laparoscopic-assisted gastropexy (LAG) and incisional gastropexy (IG) in 10 clinically normal Beagles. Surgical time, incision
length, visual analog scale (VAS) score, University of Melbourne Pain Scale (UMPS) score, and plasma C-reactive protein (CRP), plasma cortisol (COR), and serum interleukin-6 (IL-6) levels were evaluated. The VAS and UMPS scores
and COR and IL-6 levels were recorded at 0.5, 1, 2, 4, 8, 12, 18 and 24 hr after surgery. CRP level was recorded at 12, 24 and 48 hr after surgery. The VAS and UMPS scores showed no significant intergroup differences. Compared to
IG, LAG had significantly lower surgical time (45 ± 9.91 min vs 64 ± 5.30 min; P<0.05), incision length (46 ± 8.21 mm vs 129 ± 19.49 mm; P<0.05), CRP level (12 hr after surgery; 4.58 ± 1.58
mg/dl vs 12.4 ± 1.34 mg/dl; P<0.01), and COR level (1 hr after surgery; 10.79 ± 3.07 µg/dl vs 15.9 ± 3.77
µg/dl; P<0.05). IL-6 levels showed no significant intergroup differences at any time point. However, LAG resulted in lower IL-6 levels than did IG at all postoperative time
points. Neither procedure resulted in significant surgical complications. LAG produced lower surgical stress than did IG, suggesting that LAG is a safe, minimally invasive, and highly useful technique for preventing canine gastric
dilatation-volvulus. Nevertheless, since this study used experimental models, its usefulness should be evaluated in future cases.
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Affiliation(s)
- Tomoya Haraguchi
- Laboratory of Veterinary Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Shiho Kimura
- Laboratory of Veterinary Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Harumichi Itoh
- Laboratory of Veterinary Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Shimpei Nishikawa
- Laboratory of Veterinary Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Masato Hiyama
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Yoshiki Itoh
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Yasuho Taura
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Laboratory of Veterinary Medical Center, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
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Itoh H, Nishikawa S, Haraguchi T, Arikawa Y, Hiyama M, Iseri T, Itoh Y, Nakaichi M, Taura Y, Tani K, Itamoto K. Identification of rhodamine 123-positive stem cell subpopulations in canine hepatocellular carcinoma cells. Biomed Rep 2017; 7:73-78. [PMID: 28685064 DOI: 10.3892/br.2017.925] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 05/17/2017] [Indexed: 12/19/2022] Open
Abstract
The majority of cases of chemotherapy for hepatocellular carcinoma (HCC) are not effective in human or veterinary medicine due to resistance against anticancer agents. In human medicine, hepatocellular carcinoma stem cells (HCSCs) were recently identified as cytokeratin 19 (CK19)-, cluster of differentiation (CD)-44-, and CD133-positive. However, there are few previous reports regarding canine HCSC (cHCSC). Additionally, to the best of our knowledge, the chemoresistance against anticancer agents of these cHCSCs has not been investigated. In the present study staining of cHCSCs was performed with rhodamine 123, a low-toxicity fluorescent dye for mitochondria, by flow cytometry. There were two subpopulations in the HCC cell line defined by their higher (RhoHi) and lower (RhoLo) fluorescence intensity of rhodamine 123. The RhoHi subpopulation demonstrated a higher Nanog gene expression, sphere-forming ability, and chemoresistance against gemcitabine. However, there was no significant difference between RhoHi and RhoLo regarding the proliferation rate and chemoresistance against mitoxantrone and doxorubicin. The present results indicate that the expression of rhodamine 123 identifies different stem cell subpopulations in a canine HCC cell line.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Shimpei Nishikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Tomoya Haraguchi
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Yu Arikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Masato Hiyama
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Yoshiki Itoh
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Yamaguchi 753-8511, Japan
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Itoh H, Nishikawa S, Haraguchi T, Arikawa Y, Hiyama M, Eto S, Iseri T, Itoh Y, Tani K, Nakaichi M, Taura Y, Itamoto K. Aldehyde dehydrogenase activity identifies a subpopulation of canine adipose-derived stem cells with higher differentiation potential. J Vet Med Sci 2017; 79:1540-1544. [PMID: 28579596 PMCID: PMC5627324 DOI: 10.1292/jvms.16-0503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Adipose-derived stem cells (ADSCs) are abundant and readily obtained, and have been studied for their clinical applicability in regenerative medicine. Some surface antigens have been identified as markers of different ADSC
subpopulations in mice and humans. However, it is unclear whether functionally distinct subpopulations exist in dogs. To address this issue, we evaluated aldehyde dehydrogenase (ALDH) activity—a widely used stem cell marker in
mice and humans—by flow cytometry. Approximately 20% of bulk ADSCs showed high ALDH activity. Compared to cells with low activity (ALDHLo), the high-activity (ALDHHi) subpopulation exhibited a higher capacity
for adipogenic and osteogenic differentiation. This is the first report of distinct ADSC subpopulations in dogs that differ in terms of adipogenic and osteogenic differentiation potential.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Shimpei Nishikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Tomoya Haraguchi
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Yu Arikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Masato Hiyama
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Shotaro Eto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Toshie Iseri
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Yoshiki Itoh
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Munekazu Nakaichi
- Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8515, Japan
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Oishi Y, Tani K, Ozono K, Itamoto K, Haraguchi T, Taura Y. Transcatheter arterial embolization in normal canine liver. Vet Surg 2017; 46:797-802. [DOI: 10.1111/vsu.12663] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 11/20/2016] [Accepted: 12/16/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Yasuhisa Oishi
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Koushiro Ozono
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Kazuhito Itamoto
- Animal Medical Center, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Tomoya Haraguchi
- Animal Medical Center, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
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Itoh H, Itamoto K, Eto S, Haraguchi T, Nishikawa S, Tani K, Itoh Y, Hiyama M, Iseri T, Nakaichi M, Taura Y. Craniocervical junction abnormalities with atlantoaxial subluxation caused by ventral subluxation of C2 in a dog. Open Vet J 2017; 7:65-69. [PMID: 28540253 PMCID: PMC5443404 DOI: 10.4314/ovj.v7i1.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 03/20/2017] [Indexed: 11/22/2022] Open
Abstract
Craniocervical junction abnormalities with atlantoaxial subluxation caused by ventral
subluxation of C2 were diagnosed in a 6-month-old female Pomeranian with tetraplegia
as a clinical sign. Lateral survey radiography of the neck with flexion revealed
atlantoaxial subluxation with ventral subluxation of C2. Computed tomography revealed
absence of dens and atlanto-occipital overlapping. Magnetic resonance imaging showed
compression of the spinal cord and indentation of caudal cerebellum. The diagnosis
was Chiari-like malformation, atlantoaxial subluxation with ventral displacement of
C2, atlanto-occipital overlapping, and syringomyelia. The dog underwent foramen
magnum decompression, dorsal laminectomy of C1, and ventral fixation of the
atlantoaxial joint. Soon after the operation, voluntary movements of the legs were
recovered. Finally, the dog could stand and walk without assistance. The dog had
complicated malformations at the craniocervical junction but foramen magnum
decompression and dorsal laminectomy for Chiari-like malformation, and ventral
fixation for atlantoaxial subluxation resulted in an excellent clinical outcome.
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Affiliation(s)
- Harumichi Itoh
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Kazuhito Itamoto
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Shotaro Eto
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Tomoya Haraguchi
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Shimpei Nishikawa
- Department of Small Animal Clinical Science, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Kenji Tani
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Yoshiki Itoh
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Masato Hiyama
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Toshie Iseri
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Munekazu Nakaichi
- Laboratory of Veterinary Radiology Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
| | - Yasuho Taura
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
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Kobayashi K, Shimokawa Miyama T, Itamoto K, Noguchi S, Baba K, Mizuno T, Okuda M. Development of hepatocellular carcinoma after long-term immunosuppressive therapy including danazol in a dog. J Vet Med Sci 2016; 78:1611-1614. [PMID: 27320967 PMCID: PMC5095632 DOI: 10.1292/jvms.16-0019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 2-year-old female beagle was referred to our hospital for evaluation of anemia. Laboratory tests, including bone marrow cytology, revealed non-regenerative immune-mediated anemia (NRIMA). Although initial immunosuppressive multi-drug therapy was not effective, additional administration of danazol was successful in treating the anemia. However, hepatocellular carcinoma (HCC) developed about 20 months after the administration of danazol. In humans, several cases of development of HCC after the administration of danazol have been reported. The present report describes a case of HCC development in a dog after chronic administration of danazol in addition to other immunosuppressive drugs.
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Affiliation(s)
- Kosuke Kobayashi
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
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Oishi Y, Tani K, Nakazawa H, Itamoto K, Haraguchi T, Taura Y. Anatomical evaluation of hepatic vascular system in healthy beagles using X-ray contrast computed tomography. J Vet Med Sci 2015; 77:925-9. [PMID: 25843113 PMCID: PMC4565814 DOI: 10.1292/jvms.14-0469] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Liver contrast X-ray computed tomography (CT) has been used for evaluation of hepatic vessels for liver transplantation, liver lobectomy, interventional radiology and diagnosis of hepatocellular carcinoma in humans. However, there remains scant available anatomical information on normal hepatic vessels in the veterinary field. In this study, visualization of hepatic vessels was evaluated in 32 normal beagle dogs by X-ray contrast CT using triple phase images. The following hepatic vessels were clearly visualized: arterial, portal and hepatic veins. With regards to the running patterns of the portal vein and hepatic vein, there were no significant differences between the dogs. However, the hepatic artery exhibited some differences in each dog. In particular, the hepatic artery of the quadrate lobe and the right lateral lobe had many running patterns. The results of the present study could be useful for veterinary diagnosis, surgery and interventional radiology.
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Affiliation(s)
- Yasuhisa Oishi
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8511, Japan
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Oda Y, Tani K, Asari Y, Quintanilha LF, Haraguchi T, Momota Y, Katayama M, Itamoto K, Nakazawa H, Taura Y. Canine bone marrow stromal cells promote functional recovery in mice with spinal cord injury. J Vet Med Sci 2014; 76:905-8. [PMID: 24561315 PMCID: PMC4108777 DOI: 10.1292/jvms.13-0587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Regenerative therapy has
begun to be clinically applied in humans and dogs to treat neurological disorders, such as
spinal cord injury (SCI). Here, we show the therapeutic potential of transplantation of
cultured canine bone marrow stromal cells (BMSCs) into mice with SCI. Canine BMSC
transplantation therapy was performed, immediately after the spinal cord was injured.
Canine BMSC therapy enhanced functional recovery of the hind limbs in mice with SCI.
Nestin-positive cells were observed only in the lesion of mice with SCI that received
BMSCs. These results suggest that canine BMSCs promote functional recovery in mice with
SCI and that migration of nestin-positive cells may contribute to the efficacy of the BMSC
treatment.
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Affiliation(s)
- Yasutaka Oda
- The United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
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Oda Y, Tani K, Isozaki A, Haraguchi T, Itamoto K, Nakazawa H, Taura Y. Effects of polyethylene glycol administration and bone marrow stromal cell transplantation therapy in spinal cord injury mice. J Vet Med Sci 2013; 76:415-21. [PMID: 24270802 PMCID: PMC4013369 DOI: 10.1292/jvms.13-0167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Bone marrow stromal cell (BMSC) transplantation has been reported as treatments
that promote functional recovery after spinal cord injury (SCI) in humans and animals.
Polyethylene glycol (PEG) has been also reported as treatments that promote functional
recovery after spinal cord injury (SCI) in humans and animals. Therefore, administration
of PEG combined with BMSC transplantation may improve outcomes compared with BMSC
transplantation only in SCI model mice. SCI mice were divided into a control-group,
BMSC-group, PEG-group and BMSC+PEG-group. BMSC transplantation and PEG administration were
performed immediately after surgery. Compared to the control-group, PEG- and
BMSC+PEG-groups showed significant locomotor functional recovery 4 weeks after therapy. We
observed no significant differences among the groups. In the BMSC- and BMSC+PEG-groups,
immunohistochemistry showed that many neuronal cells aggressively migrated toward the
glial scar from the region rostral of the lesion site. In the control- and PEG-groups, the
boundary of the injured regions was covered with astrocytes, and a few neuronal cells were
migrated toward the glial scar. We conclude that combined BMSC transplantation with PEG
treatment showed no synergistic effects on locomotor functional recovery or beneficial
cellular events. Further studies may improve the effect of the treatment, including
modification of the timing of BMSC transplantation.
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Affiliation(s)
- Yasutaka Oda
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
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Oda Y, Tani K, Kanei T, Haraguchi T, Itamoto K, Nakazawa H, Taura Y. Characterization of neuron-like cells derived from canine bone marrow stromal cells. Vet Res Commun 2013; 37:133-8. [PMID: 23435810 DOI: 10.1007/s11259-013-9555-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2013] [Indexed: 01/26/2023]
Abstract
Regenerative therapy using bone marrow stromal cells (BMSCs) has begun to be clinically applied in humans and dogs for neurological disorders such as spinal cord injury. Under appropriate conditions in vitro, BMSCs differentiate into neuronal cells, which may improve the effects of regenerative therapy. In this study, we evaluated canine neuron-like cells (NLCs) derived from BMSCs. We speculated on their suitability for neuro-transplantation from the point of view of their morphological features, long-term viability, abundant availability, and ability to be subcultured. Canine NLCs were differentiated as follows: third-passage BMSCs were maintained in pre-induction medium containing 2-mercaptoethanol and dimethylsulfoxide for 5 h, and then cells were transferred to neuronal induction medium containing fetal bovine serum, basic fibroblast growth factor, epidermal growth factor, dibutyryl cyclic AMP, and isobutylmethylxanthine for 7 or 14 days. Canine NLCs fulfilled the transplantation criteria and expressed markers of both immature neurons (nestin, 84.7 %) and mature neuronal cells (microtubule-associated protein-2, 95.7 %; βIII-tubulin protein, 12.9 %; glial fibrillary acidic protein, 9.2 %). These results suggest that canine BMSCs can be induced to differentiate into neuronal cells and may be suitable for neuro-transplantation. This study may provide information for improving cellular therapy for neurological diseases.
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Affiliation(s)
- Yasutaka Oda
- Department of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan.
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Hasegawa D, Yamato O, Nakamoto Y, Ozawa T, Yabuki A, Itamoto K, Kuwabara T, Fujita M, Takahashi K, Mizoguchi S, Orima H. Serial MRI features of canine GM1 gangliosidosis: a possible imaging biomarker for diagnosis and progression of the disease. ScientificWorldJournal 2012; 2012:250197. [PMID: 22536126 PMCID: PMC3334264 DOI: 10.1100/2012/250197] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Accepted: 11/20/2011] [Indexed: 11/17/2022] Open
Abstract
GM1 gangliosidosis is a fatal neurodegenerative lysosomal storage disease caused by an autosomal recessively inherited deficiency of β-galactosidase activity. Effective therapies need to be developed to treat the disease. In Shiba Inu dogs, one of the canine GM1 gangliosidosis models, neurological signs of the disease, including ataxia, start at approximately 5 months of age and progress until the terminal stage at 12 to 15 months of age. In the present study, serial MR images were taken of an affected dog from a model colony of GM1 gangliosidosis and 4 sporadic clinical cases demonstrating the same mutation in order to characterize the MRI features of this canine GM1 gangliosidosis. By 2 months of age at the latest and persisting until the terminal stage of the disease, the MR findings consistently displayed diffuse hyperintensity in the white matter of the entire cerebrum on T2-weighted images. In addition, brain atrophy manifested at 9 months of age and progressed thereafter. Although a definitive diagnosis depends on biochemical and genetic analyses, these MR characteristics could serve as a diagnostic marker in suspect animals with or without neurological signs. Furthermore, serial changes in MR images could be used as a biomarker to noninvasively monitor the efficacy of newly developed therapeutic strategies.
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Affiliation(s)
- Daisuke Hasegawa
- Division of Veterinary Radiology, Department of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
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Baba K, Itamoto K, Amimoto A, Kitagawa K, Hiraoka H, Mizuno T, Sato H, Okuda M. Ehrlichia canis infection in two dogs that emigrated from endemic areas. J Vet Med Sci 2011; 74:775-8. [PMID: 22214859 DOI: 10.1292/jvms.11-0401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Two dogs, emigrated from Zambia and China to Japan, were diagnosed with Ehrlichia canis infection. Both cases had thrombocytopenia, non-regenerative anemia, and hypergloblinemia with polyclonal gammopathy. Case 1 had ataxia of the hind limbs. Severe meningitis was revealed by magnetic resonance imaging examination. Intracytoplasmic inclusions were observed in mononuclear cells of cerebrospinal fluid. Case 2 had a history of bilateral epistaxis, and severe pancytopenia was noticed in complete blood count. Diagnosis was finally achieved by nested polymerase chain reaction and sequence analysis. Thus, even in non-endemic areas, E. canis infection should be included in the differential diagnosis of clinically ill dogs that emigrated from endemic areas.
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Affiliation(s)
- Kenji Baba
- Laboratory of Veterinary Parasitology, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan.
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Haraguchi T, Tani K, Takagishi R, Oda Y, Itamoto K, Yamamoto N, Terai S, Sakaida I, Nakazawa H, Taura Y. Therapeutic potential of canine bone marrow stromal cells (BMSCs) in the carbon tetrachloride (CCl4) induced chronic liver dysfunction mouse model. J Vet Med Sci 2011; 74:607-11. [PMID: 22198059 DOI: 10.1292/jvms.11-0505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Regenerative medicine using bone marrow cells is an attractive therapy for the cure of patients with severe liver disease. Here, we show the therapeutic potential of canine bone marrow stromal cells (BMSCs) in mouse models of CCl(4)-induced chronic liver dysfunction. We used two different models for xenotransplantation, nude mice and cyclosporine A (CSA) immunosuppressed mice. Serum parameters from a standard liver panel were not improved following transplantation. However, fibrotic liver lesions with severe inflammation were decreased in CCl(4)-treated CSA mice following BMSC transplantation. Effective migration of transplanted canine BMSCs was limited to persistently injured liver in CCl(4)-treated CSA mice, where they may be effective in resolving inflammatory fibrotic lesions. These results suggest that canine BMSCs are an effective cell source for liver regeneration.
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Affiliation(s)
- Tomoya Haraguchi
- Department of Veterinary Surgery Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
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Haraguchi T, Tani K, Koga M, Oda Y, Itamoto K, Yamamoto N, Terai S, Sakaida I, Nakazawa H, Taura Y. Matrix metalloproteinases (MMPs) activity in cultured canine bone marrow stromal cells (BMSCs). J Vet Med Sci 2011; 74:633-6. [PMID: 22167104 DOI: 10.1292/jvms.11-0395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Autologous bone marrow stromal cells (BMSCs) infusion therapy improves the hepatic fibrosis. To investigate the mechanism of remission, we evaluated the matrix metalloproteinase (MMP)-2 and -9 activity in canine BMSCs and the effect of pro-inflammatory cytokines on their expression. The activity and the gene expression of MMPs were analyzed by gelatin zymography and quantitative RT-PCR, respectively. The specific gelatinase bands were indicative effect of MMP-2 and -9 in canine BMSCs. MMP-2 expression seemed to be increased by TNF-α and IL-1β while MMP-9 was enhanced by TNF-α and IL-6. These results suggested that remissive effect on liver fibrosis might be partly attributable to the MMP-2 and -9 activity in BMSCs under the inflammatory condition.
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Affiliation(s)
- Tomoya Haraguchi
- Department of Veterinary Surgery, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
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Abstract
The presence of a malignant mixed tumor, also known as a carcinosarcoma, in the salivary gland is very rare. Such tumors, which are typically aggressive, are characterized by the presence of carcinomatous and sarcomatous components. A 9-year-old neutered female domestic short-haired cat presented with swelling in the right mandibular lesion that had rapidly enlarged over the previous 3 weeks. Physical examination revealed a large, fluctuated and painless subcutaneous swelling that was associated with a firm mass. Radiographs of the head revealed a soft-tissue density that involved faint circular calcific opacity. Contrast-enhanced computed tomography revealed that the peripheral capsulated cystic area had a contrast enhanced region without bone lysis. The cat received a total excision of the mass and postoperative radiotherapy. Histopathological analysis of the mass revealed that it was a malignant mixed tumor. Metastasis to the lung was discovered 7 weeks later, at which time treatment was stopped.
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Affiliation(s)
- Heejaung Kim
- Department of Neurology, College of Medicine, Hanyang University, Seoul 133-792, Korea
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Abstract
Aspergillus fumigatus is the predominant etiological agent of sino-orbital aspergillosis in humans and animals. Here we report for the first time A. udagawae, a previously recognised but rare opportunistic pathogen causing fatal orbital aspergillosis in a cat. Identification of this isolate was secured by comparative sequence based analyses of the ITS and the beta tubulin region. Antifungal susceptibility testing results revealed that this isolate had high in vitro MIC to amphotericin B (AMB) that correlated with in vivo failure of therapy with AMB.
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Nakamoto Y, Ozawa T, Katakabe K, Nishiya K, Mashita T, Morita Y, Yasuda N, Ishii Y, Nakaichi M, Itamoto K. Usefulness of an early diagnosis for the favorable prognosis of fibrocartilaginous embolism diagnosed by magnetic resonance imaging in 10 small- to middle-sized dogs. Vet Res Commun 2008; 32:609-17. [PMID: 18491211 DOI: 10.1007/s11259-008-9061-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2007] [Accepted: 04/02/2008] [Indexed: 10/22/2022]
Abstract
Fibrocartilaginous embolism (FCE), a disorder of rapid onset featured by nonprogressive paralysis and paresis of four legs, shows clinical symptoms very similar to those of other disorders, e.g., disk herniation. We examined 10 animals diagnosed with FCE based on clinical symptoms and magnetic resonance imaging (MRI) findings in a retrospective study to examine the relationship between onset-to-diagnosis/treatment initiation time and prognosis of FCE. Statistical procedures, including Fisher's exact probability test, were conducted. All animals in a group, in which the diagnosis was made and treatment was initiated after an elapse of <15 days after onset, showed improved symptoms; the group showed a positive correlation (r = 0.76) between "onset-to-symptom improvement time" and "onset-to-diagnosis/treatment initiation time". Furthermore, the mean onset-to-diagnosis/ treatment initiation times were 2.67 days and 10.25 days in groups without and with sequelae, respectively; the time was significantly (P < 0.02) shorter in the group without sequelae. A significant difference was found between the groups in early diagnosis and treatment initiation. Our study indicates that the early precise diagnosis for acutely developed paralysis and paresis of four legs through testings including MRI, as well as the early onset of their treatment are important to obtain a favorable prognosis.
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Affiliation(s)
- Yuya Nakamoto
- Ozawa Animal Hospital, 4, Niban-Uji, Uji, Kyoto, 611-0021, Japan.
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