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Imakura Y, Mima S, Yamazaki N, Inomata A, Mochizuki S, Iwao T, Matsunaga T. Utility of human induced pluripotent stem cell-derived small intestinal epithelial cells for pharmacokinetic, toxicological, and immunological studies. Biochem Biophys Res Commun 2024; 692:149356. [PMID: 38071890 DOI: 10.1016/j.bbrc.2023.149356] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/21/2023] [Accepted: 12/03/2023] [Indexed: 01/06/2024]
Abstract
The small intestine, which plays a crucial role in the absorption and metabolism of drugs and foods, serves as a target organ for drug-induced toxicity and immune interactions with functional foods and intestinal bacteria. Current alternative models of the human small intestine, such as Caco-2 cells and experimental animals, have limitations due to variations in the expression levels of metabolic enzymes, transporters, and receptors. This study presents investigations into the utility of human induced pluripotent stem cell-derived small intestinal epithelial cells (hiSIECs) for pharmacokinetic, toxicological, and immunological studies, respectively. While hiSIECs displayed small intestinal epithelial cell characteristics and barrier function, they demonstrated pharmacokinetic properties such as cytochrome P450 3A4/5 activity equivalent to human primary enterocytes and stable P-glycoprotein activity. These cells also demonstrated potential for assessing two forms of intestinal toxicity caused by anticancer drugs and gamma-secretase inhibitors, displaying immune responses mediated by toll-like and fatty acid receptors while serving as an inflammatory gut model through the addition of tumor necrosis factor alpha and interferon gamma. Overall, hiSIECs hold promise as an in vitro model for assessing pharmacokinetics, toxicity, and effects on the intestinal immunity of pharmaceuticals, functional foods, supplements, and intestinal bacteria.
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Affiliation(s)
- Yuki Imakura
- Bio Science & Engineering Laboratory, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan; Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Shinji Mima
- Bio Science & Engineering Laboratory, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan
| | - Nao Yamazaki
- Bio Science & Engineering Laboratory, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan
| | - Akira Inomata
- Bio Science & Engineering Laboratory, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan
| | - Seiichi Mochizuki
- Bio Science & Engineering Laboratory, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan
| | - Takahiro Iwao
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan.
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
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Ichikawa-Kaji Y, Ishizawa F, Nishiyama R, Tachikawa H, Uemura N, Moriuchi Y, Umino K, Hsiao Y, Muramatsu H, Suzuki T, Inomata A, Honda K, Moriyasu T. Development of a detector tube for rapid detection of tadalafil in adulterated dietary supplements. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Makita-Suzuki K, Kakinuma C, Inomata A, Shimada Y, Hara T, Yao T. Dog-specific hemorrhagic changes induced by liposomal formulations, in the liver and the gallbladder. J Toxicol Pathol 2019; 33:1-9. [PMID: 32051659 PMCID: PMC7008207 DOI: 10.1293/tox.2019-0029] [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: 04/08/2019] [Accepted: 08/16/2019] [Indexed: 11/19/2022] Open
Abstract
Although several liposomal drugs, including liposomal doxorubicin, have been approved, the etiology of the pathological responses caused by their physicochemical properties remains unknown. Herein, we investigated the pathological changes in the liver and the gallbladder of dogs following a single injection of liposomal doxorubicin (1 or 2.5 mg/kg) or an empty liposomal formulation (i.e., liposomal formulation without doxorubicin, ca. 21 mg/kg as lipid content). Injection of liposomal doxorubicin or the empty liposomal formulation induced hemorrhagic changes in the liver and the gallbladder. These changes were accompanied by minimal cellular infiltration with no obvious changes in the blood vessels. As there were no differences in the incidence and severity of hemorrhage between the groups administered comparable amounts of total lipid, the physicochemical properties of the liposomal formulation rather than an active pharmacological ingredient, doxorubicin, were associated with the hemorrhagic changes. Furthermore, decreased cytoplasmic granules with low electron density in mast cells beneath the endothelium of the hepatic vein were observed in the liver of dogs treated with liposomal doxorubicin or empty liposomal formulation. Injection of compound 48/80, a histamine releaser induced comparable hemorrhage in dogs, implying that hemorrhage caused by injection of liposomal doxorubicin or the empty liposomal formulation could be attributed to the histamine released from mast cells. The absence of similar hemorrhagic lesions in other species commonly used in toxicology studies (i.e., rats and monkeys), as well as humans, is due to the lack of mast cells beneath the endothelium of the hepatic vein in these species.
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Affiliation(s)
- Keiko Makita-Suzuki
- Pharmaceutical & Healthcare Research Laboratories, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa 258-8577, Japan.,Department of Human Pathology, Juntendo University Faculty of Medicine, 1-1-19 Bunkyo-ku, Tokyo 113-8421, Japan
| | - Chihaya Kakinuma
- Department of Human Pathology, Juntendo University Faculty of Medicine, 1-1-19 Bunkyo-ku, Tokyo 113-8421, Japan
| | - Akira Inomata
- Pharmaceutical & Healthcare Research Laboratories, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Yasuhiro Shimada
- Department of Human Pathology, Juntendo University Faculty of Medicine, 1-1-19 Bunkyo-ku, Tokyo 113-8421, Japan
| | - Takefumi Hara
- Pharmaceutical & Healthcare Research Laboratories, FUJIFILM Corporation, 577 Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Takashi Yao
- Department of Human Pathology, Juntendo University Faculty of Medicine, 1-1-19 Bunkyo-ku, Tokyo 113-8421, Japan
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Naito T, Saito T, Higuchi T, Inomata A, Hayashi T, Shimada Y, Yamauchi-Ohguchi A, Kenmochi S, Kakinuma C, Yao T. Dedifferentiated retroperitoneal liposarcoma spontaneously occurring in an aged SD rat. J Toxicol Pathol 2018; 31:141-146. [PMID: 29750003 PMCID: PMC5938215 DOI: 10.1293/tox.2017-0055] [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: 09/15/2017] [Accepted: 12/13/2017] [Indexed: 11/25/2022] Open
Abstract
Liposarcoma is a rare neoplasm in rats and is characterized by the presence of
lipoblasts containing multiple cytoplasmic vacuoles. We encountered a rare type of
liposarcoma in a male SD (Crj:CD(SD)IGS) rat during a long-term study to gather background
data. At necropsy at 105 weeks of age, there was a large amount of fatty tissue covering
the mesentery, pancreas, and retroperitoneum; a white nodule in the right kidney; and
paleness of the liver. Microscopically, the tumor had a well-differentiated component and
dedifferentiated high-grade component. Immunohistochemical and electron microscopic
examinations revealed that the pleomorphic tumor cells retained the characteristics of
lipoblasts. Distant or disseminated metastasis was also confirmed in various organs. A
liposarcoma with these histological features is extremely rare in rats, and this is the
first report of a highly metastatic dedifferentiated type of liposarcoma originating from
the abdominal fat tissue in a rat.
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Affiliation(s)
- Tomoharu Naito
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Tsuyoshi Saito
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tamami Higuchi
- Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan.,Department of Oncology Clinical Development, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Akira Inomata
- Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Takuo Hayashi
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuhiro Shimada
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Atsuko Yamauchi-Ohguchi
- Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Sayaka Kenmochi
- Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Chihaya Kakinuma
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Pharmaceutical & Healthcare Research Laboratories Research & Development Management Headquarters, FujiFilm Corporation, 577 Ushizima, Kaisei-cho, Ashigarakami-gun, Kanagawa 258-8577, Japan
| | - Takashi Yao
- Department of Human Pathology, School of Medicine, Juntendo University, 1-1-19 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Inomata A, Hayakawa K, Aoki T, Hosokawa S. Spontaneous carcinosarcoma originating from the renal pelvis ina rat. J Toxicol Pathol 2016; 29:185-9. [PMID: 27559244 PMCID: PMC4958616 DOI: 10.1293/tox.2016-0007] [Citation(s) in RCA: 2] [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] [Received: 01/25/2016] [Accepted: 03/08/2016] [Indexed: 11/19/2022] Open
Abstract
Carcinosarcoma is a rare neoplasm composed of malignant epithelial and stromal elements, and, for rats, carcinosarcomas in the kidney have not been reported. In a long-term study to gather background data, we encountered a spontaneous carcinosarcoma originating from the renal pelvis with metastasis to the lung. At necropsy, a mass was observed in the abdominal cavity, and white nodules were scattered in lung lobes. Microscopically, there was polypoid hyperplasia of the urothelium accompanied by hyperplasia of spindle stromal cells in the pelvis. The intra-abdominal tumor was composed of epithelial and stromal elements; in the lung, the tumor cells invaded along alveoli/bronchi and occasionally invaded the parenchyma from the blood vessels. Immunohistochemical and electron microscopic examinations revealed that the epithelial element consisted of transitional epithelial cells and that the stromal element consisted of lipoblasts. The tumor was diagnosed as a carcinosarcoma originating from the renal pelvis, and this is the first report of a carcinosarcoma originating from the renal pelvis in a rat.
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Affiliation(s)
- Akira Inomata
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Kazuhiro Hayakawa
- Preclinical Safety Research Laboratories, Kawashima Division, Sunplanet Co., Ltd., 1 Kawashimatakehaya-machi, Kakamigahara, Gifu 501-6024, Japan
| | - Toyohiko Aoki
- Preclinical Safety Research Laboratories, Kawashima Division, Sunplanet Co., Ltd., 1 Kawashimatakehaya-machi, Kakamigahara, Gifu 501-6024, Japan
| | - Satoru Hosokawa
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
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6
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Taketa Y, Shiotani M, Tsuru Y, Kotani S, Osada Y, Fukushima T, Inomata A, Hosokawa S. Application of a compact magnetic resonance imaging system for toxicologic pathology: evaluation of lithium-pilocarpine-induced rat brain lesions. J Toxicol Pathol 2015; 28:217-24. [PMID: 26538811 PMCID: PMC4604131 DOI: 10.1293/tox.2015-0043] [Citation(s) in RCA: 5] [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] [Received: 07/13/2015] [Accepted: 08/07/2015] [Indexed: 11/29/2022] Open
Abstract
Magnetic resonance imaging (MRI) is a useful noninvasive tool used to detect lesions in clinical and veterinary medicine. The present study evaluated the suitability of a new easy-to-use compact MRI platform (M2 permanent magnet system, Aspect Imaging, Shoham, Israel) for assisting with preclinical toxicologic pathology examination of lesions in the rat brain. In order to induce brain lesions, male Sprague-Dawley rats were treated once with lithium chloride (127 mg/kg, intraperitoneal [i.p.]) followed by pilocarpine (30 mg/kg, i.p.). One week after dosing, the perfused, fixed brains were collected, analyzed by the MRI system and examined histopathologically. MRI of the brain of treated rats revealed areas of high T1 and middle to low T2 signals, when compared with the controls, in the piriform cortex, lateral thalamic nucleus, posterior paraventricular thalamic nucleus and posterior hypothalamic nucleus of the cerebrum. The altered MRI signal areas were consistent with well-circumscribed foci of neuronal cell degeneration/necrosis accompanied by glial cell proliferation. The present data demonstrated that quick analysis of fixed organs by the MRI system can detect the presence and location of toxicologic lesions and provide useful temporal information for selection of appropriate sections for histopathologic examination before routine slide preparation, especially in complex and functionally heterogeneous organs such as the brain.
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Affiliation(s)
- Yoshikazu Taketa
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Motohiro Shiotani
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Yoshiharu Tsuru
- Research Support Department, Primetech Corp., 1-3-25 Koishikawa, Bunkyo-ku, Tokyo 112-0002, Japan
| | - Sadaharu Kotani
- Neuroscience and General Medicine Product Creation Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Yoshihide Osada
- Neuroscience and General Medicine Product Creation Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Tatsuto Fukushima
- Neuroscience and General Medicine Product Creation Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Akira Inomata
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Satoru Hosokawa
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
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Inomata A, Sasano H. Practical approaches for evaluating adrenal toxicity in nonclinical safety assessment. J Toxicol Pathol 2015; 28:125-32. [PMID: 26441474 PMCID: PMC4588206 DOI: 10.1293/tox.2015-0025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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] [Received: 05/12/2015] [Accepted: 05/13/2015] [Indexed: 11/23/2022] Open
Abstract
The adrenal gland has characteristic morphological and biochemical features that render it particularly susceptible to the actions of xenobiotics. As is the case with other endocrine organs, the adrenal gland is under the control of upstream organs (hypothalamic-pituitary system) in vivo, often making it difficult to elucidate the mode of toxicity of a test article. It is very important, especially for pharmaceuticals, to determine whether a test article-related change is caused by a direct effect or other associated factors. In addition, antemortem data, including clinical signs, body weight, food consumption and clinical pathology, and postmortem data, including gross pathology, organ weight and histopathologic examination of the adrenal glands and other related organs, should be carefully monitored and evaluated. During evaluation, the following should also be taken into account: (1) species, sex and age of animals used, (2) metabolic activation by a cytochrome P450 enzyme(s) and (3) physicochemical properties and the metabolic pathway of the test article. In this review, we describe the following crucial points for toxicologic pathologists to consider when evaluating adrenal toxicity: functional anatomy, blood supply, hormone production in each compartment, steroid biosynthesis, potential medulla-cortex interaction, and species and gender differences in anatomical features and other features of the adrenal gland which could affect vulnerability to toxic effects. Finally practical approaches for evaluating adrenal toxicity in nonclinical safety studies are discussed.
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Affiliation(s)
- Akira Inomata
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Hironobu Sasano
- Department of Pathology, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
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Murakoshi F, Takeuchi M, Inomata A, Horimoto T, Ito M, Suzuki Y, Kato K. Administration of lasalocid-NA is preventive against cryptosporidiosis of newborn calves. Vet Rec 2014; 175:353. [DOI: 10.1136/vr.102508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- F. Murakoshi
- Department of Veterinary Microbiology; Graduate School of Agricultural and Life Sciences; University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
- National Research Center for Protozoan Diseases; Obihiro University of Agriculture and Veterinary Medicine; Inada-cho Obihiro Hokkaido 080-8555 Japan
| | - M. Takeuchi
- Akabane Animal Clinic Co.; 55 Ishizoe Akabane-cho Tahara Aichi 441-3502 Japan
| | - A. Inomata
- Department of Veterinary Microbiology; Graduate School of Agricultural and Life Sciences; University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - T. Horimoto
- Department of Veterinary Microbiology; Graduate School of Agricultural and Life Sciences; University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - M. Ito
- Akabane Animal Clinic Co.; 55 Ishizoe Akabane-cho Tahara Aichi 441-3502 Japan
| | - Y. Suzuki
- Akabane Animal Clinic Co.; 55 Ishizoe Akabane-cho Tahara Aichi 441-3502 Japan
| | - K. Kato
- Department of Veterinary Microbiology; Graduate School of Agricultural and Life Sciences; University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
- National Research Center for Protozoan Diseases; Obihiro University of Agriculture and Veterinary Medicine; Inada-cho Obihiro Hokkaido 080-8555 Japan
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Takemae H, Sugi T, Kobayashi K, Murakoshi F, Recuenco FC, Ishiwa A, Inomata A, Horimoto T, Yokoyama N, Kato K. Analyses of the binding between Theileria orientalis major piroplasm surface proteins and bovine red blood cells. Vet Rec 2014; 175:149. [PMID: 24943099 DOI: 10.1136/vr.102535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- H Takemae
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
| | - T Sugi
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Kobayashi
- Division of Microbiology and Immunology, Department of Host-Parasite Interaction, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - F Murakoshi
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - F C Recuenco
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - A Ishiwa
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - A Inomata
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - T Horimoto
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - N Yokoyama
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
| | - K Kato
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Inomata A, Nakano-Ito K, Fujikawa Y, Sonoda J, Hayakawa K, Ohta E, Taketa Y, Van Gessel Y, Akare S, Hutto D, Hosokawa S, Tsukidate K. Brunner's gland lesions in rats induced by a vascular endothelial growth factor receptor inhibitor. Toxicol Pathol 2014; 42:1267-74. [PMID: 24499803 DOI: 10.1177/0192623313520350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Vascular endothelial growth factor (VEGF) receptor tyrosine kinase (RTK) inhibitors are reported to cause reversible mucosal hyperplasia (adenosis) in the duodenum of rats; however, the pathogenesis is not fully elucidated. Using lenvatinib, a VEGF RTK inhibitor, we characterized the histologic time course of this duodenal change in rats. At 4 weeks, there was degeneration and necrosis of Brunner's gland epithelium accompanied by neutrophil infiltration around the affected glands. At 13 weeks, the inflammation was more extensive, and Brunner's gland epithelium was attenuated and flattened and was accompanied by reactive hyperplasia of duodenal epithelium. At 26 weeks, the changes became more severe and chronic and characterized by marked cystic dilation, which extended to the external muscular layer. These dilated glands exhibited morphological characteristics of duodenal crypt epithelium, suggestive of replacement of disappeared Brunner's glands by regenerative duodenal crypt epithelial cells. Similar changes were not present in similar time course studies in dog and monkey studies, suggesting that this is a rodent- or species-specific change. Based on the temporal progression of Brunner's gland lesion, we identify degeneration and necrosis of the Brunner's glands as the primary change leading to inflammation, cystic dilatation, and regeneration with cells that are morphologically suggestive of duodenal crypt epithelium.
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Affiliation(s)
| | | | | | - Jiro Sonoda
- Drug Safety Tsukuba, Eisai, Tsukuba, Ibaraki, Japan
| | - Kazuhiro Hayakawa
- Preclinical Safety Research Laboratories, Kawashima Division, Sunplanet, Kagamigahara, Gifu, Japan
| | - Etsuko Ohta
- Drug Safety Tsukuba, Eisai, Tsukuba, Ibaraki, Japan
| | | | | | - Sandeep Akare
- Drug Safety Andover, Eisai, Andover, Massachusetts, USA
| | - David Hutto
- Drug Safety Andover, Eisai, Andover, Massachusetts, USA
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Taketa Y, Inomata A, Sonoda J, Hayakawa K, Nakano-Ito K, Ohta E, Seki Y, Goto A, Hosokawa S. Granulomatous nephritis consistent with malakoplakia in a cynomolgus monkey. J Toxicol Pathol 2013; 26:419-22. [PMID: 24526815 PMCID: PMC3921925 DOI: 10.1293/tox.2013-0024] [Citation(s) in RCA: 3] [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] [Received: 05/13/2013] [Accepted: 07/06/2013] [Indexed: 11/19/2022] Open
Abstract
Malakoplakia is a rare form of chronic granulomatous inflammation in mammals, and usually affects the urinary tract in humans. In this report, we present a case of granulomatous nephritis consistent with malakoplakia in a 4-year-old male cynomolgus monkey. Gross examination showed that the kidney was markedly enlarged and adhered to the surrounding organs. Histology showed that there was diffuse interstitial infiltration of histiocytes with abundant foamy eosinophilic cytoplasm resembling von Hansemann cells, PAS-positive granular cytoplasm and occasional PAS- and iron-positive intracellular small inclusion bodies. Electron microscopy showed that these histiocytes contained abundant lysosomes and phagolysosomes but no obvious Michaelis-Gutmann bodies. Based on these findings, a diagnosis of granulomatous nephritis consistent with early malakoplakia was made. This is the first report in a monkey of a renal lesion consistent with malakoplakia.
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Affiliation(s)
- Yoshikazu Taketa
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Akira Inomata
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Jiro Sonoda
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Kazuhiro Hayakawa
- Preclinical Safety Research Laboratories, Kawashima Division, Sunplanet Co., Ltd., 1 Kawashimatakehaya-machi, Kagamigahara, Gifu 501-6195, Japan
| | - Kyoko Nakano-Ito
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Etsuko Ohta
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Yuki Seki
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Aya Goto
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Satoru Hosokawa
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
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12
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Goto A, Sonoda J, Seki Y, Taketa Y, Ohta E, Nakano K, Inomata A, Hayakawa K, Aoki T, Tsukidate K, Hosokawa S. Spontaneous gingivitis related to hair penetration in rats. J Toxicol Pathol 2012; 25:229-32. [PMID: 22988343 PMCID: PMC3434340 DOI: 10.1293/tox.25.229] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 05/24/2012] [Indexed: 11/19/2022] Open
Abstract
Maxillary gingivae from male and female Crl:CD(SD) rats at 12, 16, 21, and 34 weeks of
age were examined histologically. The incidence of gingivitis was approximately 40%, with
no age or sex predilection, and was most frequent between the first and second molar.
Lesions were characterized by acute focal neutrophilic infiltration into the gingival
mucosa, occasionally with inflammatory exudate. In severe cases, inflammation extended to
the periodontal ligament with abscess formation, and adjacent alveolar bone
destruction/resorption. The most characteristic finding was the presence of hair shafts
associated with the lesion, which was observed in approximately 80% of the rats with
gingivitis. These findings suggest that molar gingivitis occurs in rats from an early age
and persists thereafter, and that the main cause of gingivitis in rats is hair penetration
into the gingiva. It would be prudent to keep these background lesions in mind as
potential modifiers in toxicity studies.
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Affiliation(s)
- Aya Goto
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., 5-3-1 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
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13
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Taketa Y, Inomata A, Hosokawa S, Sonoda J, Hayakawa K, Nakano K, Momozawa Y, Yamate J, Yoshida M, Aoki T, Tsukidate K. Histopathological Characteristics of Luteal Hypertrophy Induced by Ethylene Glycol Monomethyl Ether with a Comparison to Normal Luteal Morphology in Rats. Toxicol Pathol 2010; 39:372-80. [DOI: 10.1177/0192623310388429] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ethylene glycol monomethyl ether (EGME) is a known reproductive toxicant that induces luteal hypertrophy in rat ovaries. In this study, we characterized the histopathological features of corpora lutea (CL) from EGME–treated rats and compared them with normal CL formation and regression. Normally cycling female Sprague-Dawley rats were treated with 5-bromo-2′-deoxyuridine (BrdU) intraperitoneally on the morning of estrus and their ovaries were examined 1 (metestrus), 4 (estrus), 8 (estrus), or 12 (estrus) days later to observe the transition of BrdU-labeled cells within in the CL. CL at each time point of estrus stage were classified into 4 types: Type I (newly formed CL), Type II (mature CL), Type III (regressing CL), and Type IV (residual CL). CL almost fully regressed within 4 estrus cycles. In contrast, in female rats given EGME orally (30, 100, or 300 mg/kg for 2 or 4 weeks), luteal cells were hypertrophic with abundant cytoplasm. Although the size of CL varied, all CL in EGME–treated rats had histological features similar to Type II CL, but they were more hypertrophic with less apoptosis. These results suggest that EGME has a luteal hypertrophic effect on all CL phases, including regression.
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Affiliation(s)
- Yoshikazu Taketa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Akira Inomata
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Satoru Hosokawa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Jiro Sonoda
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kazuhiro Hayakawa
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kyoko Nakano
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Yuki Momozawa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Joji Yamate
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Midori Yoshida
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan
| | - Toyohiko Aoki
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kazuo Tsukidate
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
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14
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Dodo T, Taketa Y, Sugiyama M, Inomata A, Sonoda J, Okuda Y, Mineshima H, Hosokawa S, Aoki T. Collaborative work on evaluation of ovarian toxicity. 11) Two- or four-week repeated-dose studies and fertility study of ethylene glycol monomethyl ether in female rats. J Toxicol Sci 2009; 34 Suppl 1:SP121-8. [PMID: 19265278 DOI: 10.2131/jts.34.s121] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The objective of this study was to determine the optimal period of administration for detection of ovarian toxicity in rat repeated-dose toxicity studies. A well-known ovarian toxicant, ethylene glycol monomethyl ether (EGME), was administered to female rats at dose levels of 0, 30, 100, or 300 mg/kg for 2 or 4 weeks (repeated-dose toxicity studies). The same doses were administered to female rats for 2 weeks prior to mating, during mating, and until Day 6 of pregnancy (fertility study). In the repeated-dose toxicity studies, continuous diestrus was observed at > or = 100 mg/kg regardless of period of administration. The alterations of ovarian morphology observed at > or = 100 mg/kg after 2 or 4 weeks of administration were characterized by hypertrophy of the corpora lutea with decreased cellular debris indicating apoptosis, and increased proliferating cell nuclear antigen (PCNA)-negative large atretic follicles. The finding that newly-formed basophilic corpora lutea were scarce in affected animals exhibiting continuous diestrus suggested suppression of ovulation due to hypertrophic corpora lutea. In the fertility study, irregular estrous cycles, prolonged mating periods, lower pregnancy rates and decreased corpora lutea of pregnancy were observed at > or = 100 mg/kg. The irregularities of estrous cycle observed in some animals at 30 mg/kg were minimal. The ovarian histopathological changes in repeated-dose toxicity studies correlated well with impairment of female fertility found in the fertility study. It is concluded that a repeated-dose toxicity study with a treatment period for 2 weeks or longer is sufficient for evaluation of ovarian toxicity induced by EGME.
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Affiliation(s)
- Tetsushi Dodo
- Drug Safety Research Laboratories (Kakamigahara), Eisai Co., Ltd., Kakamigahara-shi, Gifu, Japan.
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15
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Ishihara K, Katsutani N, Asai N, Inomata A, Uemura Y, Suganuma A, Sawada K, Yokoi T, Aoki T. Identification of urinary biomarkers useful for distinguishing a difference in mechanism of toxicity in rat model of cholestasis. Basic Clin Pharmacol Toxicol 2009; 105:156-66. [PMID: 19486331 DOI: 10.1111/j.1742-7843.2009.00410.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This (1)H nuclear magnetic resonance metabonomics study was aimed to determine urinary biomarkers of cholestasis resulting from inhibition of biliary secretion of bile or obstruction of bile flow. To inhibit biliary secretion of bile, cyclosporine A was administered to male Sprague-Dawley rats. Obstruction of bile flow was induced by administration of 4,4'-methylene dianiline, alpha-naphthylisothiocyanate or bile duct ligation. Clinical pathological and histopathological examinations were performed to confirm cholestatic injury and (1)H nuclear magnetic resonance spectral data for urine samples were analysed to determine similarities and differences in profiles of metabolites using the Spotfire. In cyclosporine A-treated groups, serum total bilirubin and bile acid were significantly increased but no remarkable hepatic histopathological-changes were observed. In 4,4'-methylene dianiline-, alpha-naphthylisothiocyanate- and bile duct ligation-treated groups, serum alkaline phosphatase, gamma-glutamyltranspeptidase and total bilirubin levels increased significantly, and hepatic histopathological-changes were observed. On urinary (1)H nuclear magnetic resonance spectral analysis, area intensities derived from 0.66 to 1.90 ppm were decreased by cyclosporine A, whereas they were increased by other treatments. These metabolites were identified using the NMR suite as bile acids, branched-chain amino acids, n-butyrate, propionate, methyl malonate and valerate. These metabolites were further investigated by K-means clustering analysis. The cluster of these metabolites is considered to be altered by cholestasis. We conclude that bile acids, valine and methyl malonate have a possibility to be urinary cholestatic biomarkers, which distinguish a difference in mechanism of toxicity. (1)H nuclear magnetic resonance metabonomics thus appears to be useful for determining the mechanisms of toxicity and can be front-loaded in drug safety evaluation and biomarker discovery.
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Affiliation(s)
- Kenji Ishihara
- Tsukuba Research, Drug Safety Research Laboratories, Eisai Co, Ltd, Tsukuba, Japan.
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16
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17
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Inomata A, Kishida N, Momoda T, Akiba M, Izumiyama S, Yagita K, Endo T. Development and evaluation of a reverse transcription-loop-mediated isothermal amplification assay for rapid and high-sensitive detection of Cryptosporidium in water samples. Water Sci Technol 2009; 60:2167-2172. [PMID: 19844064 DOI: 10.2166/wst.2009.599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe a novel assay for simple, rapid and high-sensitive detection of Cryptosporidium oocysts in water samples using a reverse transcription-loop-mediated isothermal amplification (RT-LAMP). The assay is based on the detection of 18S rRNA specific for Cryptosporidium oocysts. The detection limit of the developed RT-LAMP assay was as low as 6 x 10(-3) oocysts/test tube, which theoretically enables us to detect a Cryptosporidium oocyst and perform duplicated tests even if water samples contain only one oocyst. The developed RT-LAMP assay could more sensitively detect Cryptosporidium oocysts in real water samples than the conventional assay based on microscopic observation.
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Affiliation(s)
- A Inomata
- Department of Environmental Health and Toxicology, Tokyo Metropolitan Institute of Public Health, Shinjuku, Tokyo, Japan.
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18
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Lan NT, Yamaguchi R, Inomata A, Furuya Y, Uchida K, Sugano S, Tateyama S. Comparative analyses of canine distemper viral isolates from clinical cases of canine distemper in vaccinated dogs. Vet Microbiol 2006; 115:32-42. [PMID: 16504421 DOI: 10.1016/j.vetmic.2006.01.010] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [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: 09/08/2005] [Revised: 01/13/2006] [Accepted: 01/18/2006] [Indexed: 11/19/2022]
Abstract
Sequence and phylogenetic analyses of three isolates of canine distemper virus (CDV) isolated from three dogs with a vaccination history were compared with the same analyses of vaccine virus isolated from a vaccine used for dogs. The three dogs showed clinical signs of a recent major type of CD in Japan, including oculonasal discharge and diarrhea, and pathological findings including non-suppurative encephalitis, pneumonia, mild gastroenteritis and lymphoid depletion. Inclusion bodies were in the stomach without inflammation and encephalitis was without clinical signs. One of the highest titers of CDV in different organs of the three dogs was commonly systemic lymphatic organs, including the spleen, lymph nodes and tonsils. New isolates of CDV joined to the clades of the Asia 1 group that is far from the vaccine group. These results surely indicate that wild strains of CDV from dogs with a vaccination history were not reversed vaccine virus, and that the dogs showed characteristics of recent CD in Japan.
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Affiliation(s)
- N T Lan
- Department of Veterinary Pathology, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan
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19
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Lan NT, Yamaguchi R, Furuya Y, Inomata A, Ngamkala S, Naganobu K, Kai K, Mochizuki M, Kobayashi Y, Uchida K, Tateyama S. Pathogenesis and phylogenetic analyses of canine distemper virus strain 007Lm, a new isolate in dogs. Vet Microbiol 2005; 110:197-207. [PMID: 16144749 DOI: 10.1016/j.vetmic.2005.07.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 04/28/2005] [Revised: 07/19/2005] [Accepted: 07/29/2005] [Indexed: 11/17/2022]
Abstract
The pathogenesis of a new isolate of canine distemper virus (CDV), strain 007Lm, was investigated from lymph node tissue by using Vero cells that express canine signalling lymphocyte activation molecules with a tag (Vero-DST) in dogs. Two CDV sero-negative Beagle dogs were inoculated intranasally and intraconjunctively with a virus suspension. Both infected dogs showed clinical signs of severe bloody diarrhea, conjunctivitis, ocular discharge, nasal discharge and coughing, lymphopenia, fever and weight loss. Titers of CDV-IgM and CDV-IgG in the blood were measured. CDV was detected by using reverse transcriptase-PCR and was recovered in swabs from one dog from 9 days and from the other dogs from 10 days after inoculation. Molecular and phylogenetic analyses of H and P genes showed that nucleotide and amino acid sequences of these genes of strain 007Lm after isolation in Vero-DST cells are identical to those of the original virus from fresh tissue and that strain 007Lm joins to the Asia 2 group cluster of CDV strains that is distinct from other clusters. These results indicate that (1) CDV strain 007Lm isolated in Vero-DST cells is virulent, (2) nucleotide and amino acid sequences of H and P genes of strain 007Lm do not change after isolation in Vero-DST cells compared with the original virus from fresh tissue and (3) strain 007Lm isolated from a vaccinated dog belongs to a cluster far from the vaccine strains in the phylogenetic trees of H and P genes.
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Affiliation(s)
- N T Lan
- Department of Veterinary Pathology, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan
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20
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Nakagawa T, Hirano Y, Inomata A, Yokota S, Miyachi K, Kaneda M, Umeda M, Furukawa K, Omata S, Horigome T. Participation of a fusogenic protein, glyceraldehyde-3-phosphate dehydrogenase, in nuclear membrane assembly. J Biol Chem 2003; 278:20395-404. [PMID: 12651855 DOI: 10.1074/jbc.m210824200] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We found an autoimmune serum, K199, that strongly suppresses nuclear membrane assembly in a cell-free system involving a Xenopus egg extract. Four different antibodies that suppress nuclear assembly were affinity-purified from the serum using Xenopus egg cytosol proteins. Three proteins recognized by these antibodies were identified by partial amino acid sequencing to be glyceraldehyde-3-phosphate dehydrogenase (GAPDH), fructose-1,6-bisphosphate aldolase, and the regulator of chromatin condensation 1. GAPDH is known to be a fusogenic protein. To verify the participation of GAPDH in nuclear membrane fusion, authentic antibodies against human and rat GAPDH were applied, and strong suppression of nuclear assembly at the nuclear membrane fusion step was observed. The nuclear assembly activity suppressed by antibodies was recovered on the addition of purified chicken GAPDH. A peptide with the sequence of amino acid residues 70-94 of GAPDH, which inhibits GAPDH-induced phospholipid vesicle fusion, inhibited nuclear assembly at the nuclear membrane fusion step. We propose that GAPDH plays a crucial role in the membrane fusion step in nuclear assembly in a Xenopus egg extract cell-free system.
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Affiliation(s)
- Tomoaki Nakagawa
- Course of Functional Biology, Graduate School of Science and Technology, Niigata University, Igarashi-2, Japan
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Abstract
To elucidate the relationship between 5-fluorouracil (5-FU) distribution and 5-FU-induced apoptosis and/or cell cycle arrest, microautoradiography was applied to murine intestinal crypts exposed to [14C] 5-FU by intravenous infusion. The histologic location of apoptotic cells in the crypt did not correlate to that of 5-FU. The temporal profiles of apoptotic and/or mitotic indexes corresponded to those of orally administered 5-FU in a previous study. Two cell cycle-related proteins, p21(WAF/Cip1) and bax, were also investigated in the present study. With time, p21(WAF/Cip1)-positive nuclei apparently migrated up the crypt. Bax-positive cytoplasm was observed throughout the crypt epithelial cells, accompanied by the occurrence of apoptosis, and remained until 48 h when the control level recovered. The findings demonstrate that 5-FU mainly exerts an apoptotic effect and/or cell cycle arrest by systemic exposure, and p21 and bax expression determine an individual cell's fate.
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Affiliation(s)
- Akira Inomata
- Department of Preclinical Science, Nippon Roche Research Center, Kajiwara 200, Kamakura-city, Kanagawa 247-8530, Japan.
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22
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Berger A, Inomata A, Jiang JS, Pearson JE, Bader SD. Experimental observation of disorder-driven hysteresis-loop criticality. Phys Rev Lett 2000; 85:4176-4179. [PMID: 11056653 DOI: 10.1103/physrevlett.85.4176] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2000] [Indexed: 05/23/2023]
Abstract
We have studied the effect of magnetic disorder on the magnetization reversal process in thin Co/CoO films. The antiferromagnetic CoO layer allows a reversible tuning of the magnetic disorder by simple temperature variation. For temperatures above a critical temperature T(c), we observe a discontinuous magnetization reversal, whereas smooth magnetization loops occur for T<T(c). Our measurements establish the existence of a disorder-driven critical point in the nonequilibrium phase diagram. In addition, we observe scaling behavior in the vicinity of the critical point and determine the critical exponents beta = 0.022+/-0.006 and betadelta = 0.30+/-0.03 for this two-dimensional system.
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Affiliation(s)
- A Berger
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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23
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Abstract
Endothelins are potent vasoconstrictors and pressor peptides and are important mediators of cardiac, renal and endocrine functions. Increased ET-1 levels in disease states such as congestive heart failure, pulmonary hypertension, acute myocardial infarction, and renal failure suggest the endothelin system as an attractive target for pharmacotherapy. A non-peptidic, selective, competitive endothelin receptor antagonist with an affinity for the ET(A) receptor in the subnanomolar range was administered by continuous intravenous infusion to beagle dogs, rats, and Goettingen minipigs. It caused mild arteriopathy characterised by segmental degeneration in the media of mid- to large-size coronary arteries in the heart of dog, but not rat or minipig. The lesions only occurred in the atrium and ventricle. Frequency and severity of the vascular lesions was not sex or dose related. No effects were noted in blood vessels in other organs or tissue. Plasma concentrations at steady state, and overall exposure in terms of AUC((0-24h)) were higher in minipig and rat than the dog but did not cause cardiac arteriopathy. These findings concur with those caused by other endothelin anatagonists, vasodilators and positive inotropic/vasodilating drugs such as potassium channel openers, phosphodiesterase inhibitors and peripheral vasodilators, and confirm that dogs appear to be uniquely sensitive to the development of cardiac vascular lesions.
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Affiliation(s)
- M Stephan-Gueldner
- Preclinical Research, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, PRNT 73/314, CH 4070, Basel, Switzerland.
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24
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Inomata A, Matsumoto H, Horii I. COLLABORATIVE WORK TO EVALUATE TOXICITY ON MALE REPRODUCTIVE ORGANS BY REPEATED DOSE STUDIES IN RATS : 18)COMPARATIVE 4 AND 2 WEEKS ORAL REPEATED DOSING STUDIES ON MALE REPRODUCTIVE ORGANS IN RATS TREATED WITH 5-FLUOROURACIL. J Toxicol Sci 2000; 25 Spec No:179-86. [PMID: 11349442 DOI: 10.2131/jts.25.specialissue_179] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Oral repeated toxicity studies were conducted to compare the effects of 5-fluorouracil (5-FU) administered for 4 or 2 weeks on male reproductive organs of Sprague-Dawley (SD) rats. In both studies, decrease of feces, abnormal fur and emaciation were observed. On gross autopsy examination, softening/atrophy of the testis as well as atrophy of accessory reproductive organs were noted, and absolute organ weights of male reproductive organs were almost all reduced in both studies. Histopathologically, degeneration of the seminiferous epithelium in the testis and desquamated cell debris in the epididymal ducts were apparent after both time periods. In the 2-week study, furthermore, exfoliation of the seminiferous epithelium, formation of multinucleated giant cells and vacuolation of Sertoli cells in the seminiferous tubules in the testis, and decrease of sperms in the epididymal ducts were observed. The present results indicated that a 2-week study is sufficient to detect effects on the male reproductive organs of 5-FU treatment. In our study, however, changes in associated parameters after 2-week treatment of 8-week-old rats were greater than those after 4 weeks in 6-week-old rats. Thus, for detection of 5-FU-induced male reproductive toxicity, we can evaluate more accurately by using maturated rats of the same age.
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Affiliation(s)
- A Inomata
- Department of Preclinical Science, Nippon Roche Research Center, 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan
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25
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27
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Takizawa S, Katoh C, Inomata A, Horii I. Flow cytometric analysis for sperm viability and counts in rats treated with trimethylphosphate or pyridoxine. J Toxicol Sci 1998; 23:15-23. [PMID: 9513918 DOI: 10.2131/jts.23.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Six-week old SD-Slc male rats were treated for 4 weeks with compounds known to induce toxicological changes in male reproductive organs (pyridoxine in saline, 500 mg/kg/day, i.p.) or sperm (trimethylphosphate in distilled water, 100 mg/kg/day, p.o.). Each sperm sample taken from the cauda epididymis was analyzed with flow cytometry for the evaluation of sperm viability and counts. Sperm motility and morphology by microscopical observation, and histopathological examination of reproductive organs were also performed for estimating the adverse effects of each compound on spermatogenesis and sperm. While a decrease in sperm motility was noted for the trimethylphosphate group, the low motile sperm was evaluated as being viable sperm, not moribund, with flow cytometry. In the pyridoxine group, microscopical observation revealed morphological changes of sperm and a decrease of motility. The present sperm analysis with flow cytometry also suggested morphological changes reflected by dot plot as well as decrease of sperm viability and counts. These results indicated that this procedure led to profound findings in the compound-treated animals, with evaluation as viable sperm, not moribund, in a low motile sperm sample, and suggesting morphological changes in the dot plot of flow cytometry.
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Affiliation(s)
- S Takizawa
- Department of Toxicology and Pathology, Nippon Roche Research Center, Kanagawa, Japan
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Inomata A, Horii I, Suzuki K. Prolonged Effect of 5-Fluorouracil and Its Derivatives on Apoptosis Induction and Mitotic Inhibition in the Intestinal Epithelium of Male BDF1 Mice. J Toxicol Pathol 1998. [DOI: 10.1293/tox.11.177] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Akira Inomata
- Nippon Roche K.K., Department of Preclinical Science, Nippon Roche Research Center
- Department of Veterinary Physiology, Nippon Veterinary and Animal Science University
| | - Ikuo Horii
- Nippon Roche K.K., Department of Preclinical Science, Nippon Roche Research Center
| | - Katsushi Suzuki
- Department of Veterinary Physiology, Nippon Veterinary and Animal Science University
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Nakayama K, Ishida N, Shirane M, Inomata A, Inoue T, Shishido N, Horii I, Loh DY, Nakayama K. Mice lacking p27(Kip1) display increased body size, multiple organ hyperplasia, retinal dysplasia, and pituitary tumors. Cell 1996; 85:707-20. [PMID: 8646779 DOI: 10.1016/s0092-8674(00)81237-4] [Citation(s) in RCA: 1176] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
SUMMARY Mice lacking p27(Kip1) have been created by gene targeting in embryonic stem cells. These mice are larger than the control animals, with thymus, pituitary, and adrenal glands and gonadal organs exhibiting striking enlargement. CDK2 activity is elevated about 10-fold in p27(-/-) thymocytes. Development of ovarian follicles seems to be impaired, resulting in female sterility. Similar to mice with the Rb mutation, the p27(-/-) mice often develop pituitary tumors spontaneously. The retinas of the mutant mice show a disturbed organization of the normal cellular layer pattern. These findings indicate that p27(Kip1) acts to regulate the growth of a variety of cells. Unexpectedly, the cell cycle arrest mediated by TGFbeta, rapamycin, or contact inhibition remained intact in p27(-/-) cells, suggesting that p27(Kip1) is not required in these pathways.
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Affiliation(s)
- K Nakayama
- Department of Biology, Nippon Roche Research Center, Kamakura, Kanagawa, Japan
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Inomata A. Quon gas with the boson, fermion, and near-classical limits. Phys Rev A 1995; 52:932-935. [PMID: 9912330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Suzuki S, Sato H, Kobayashi H, Takayama R, Maruyama Y, Ogino S, Ueno H, Inomata A, Nishi S, Saito T. Comparative study of IgA nephropathy with acute and insidious onset. Clinical, laboratory and pathological findings. Am J Nephrol 1992; 12:22-8. [PMID: 1415361 DOI: 10.1159/000168413] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In order to clarify the difference of clinical and pathological features between the IgA nephropathy patients with acute and insidious onset, 427 patients were examined in this study. Seventy-eight patients with acute onset (group 1) were often associated with mucosal system infections at the abrupt onset. This group revealed macroscopic hematuria, more severe microscopic hematuria (more than 20/hpf), higher glomerular filtration rate (p less than 0.01) and lower serum levels of C3 (p less than 0.01). It had also a significantly higher incidence of exudative lesions (p less than 0.001). On the other hand, the onset of 349 patients (group 2) was noticed to be insidious without preceding infections. This group showed a more severe increase in mesangial cells (p less than 0.01) and a significantly higher incidence of adhesion, arterial sclerosis and tubulointerstitial changes. Deposition of Clq, C4 and IgM and detachment of visceral epithelium from the basement membrane were more frequently seen in group 2. Twenty-seven of 345 patients followed for at least 1 year after the biopsy were on maintenance hemodialysis: 1 patient was in group 1 and 26 were in group 2. These results clarified that there was a difference in clinical, laboratory and histopathological findings between the patients with IgA nephropathy with acute and insidious onset.
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Affiliation(s)
- S Suzuki
- Department of Medicine (II), Niigata University School of Medicine, Japan
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Suzuki S, Sato H, Inomata A, Maruyama H, Ueno M, Gejyo F, Arakawa M. Immunohistological localization of beta-2-microglobulin in renal tissue as an indicator of renal dysfunction. Nephron Clin Pract 1992; 60:181-6. [PMID: 1553003 DOI: 10.1159/000186736] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
To elucidate the relationship between localization of beta 2-microglobulin (beta 2-MG) and renal lesions or dysfunction, 119 patients with various renal diseases and various degrees of renal injuries were examined: patients with beta 2-MG deposition (group 1, n = 69), and patients without renal beta 2-MG deposition (group 2, n = 50). beta 2-MG was found mainly in the tubular epithelium and tubular casts. No significant difference in the degree of proteinuria and hematuria were found between the two groups. Group 1 had a significant decrease in glomerular filtration rate (GFR; p less than 0.01): the average values of GFR in group 1 and 2 were 61.1 +/- 35.7 and 95.4 +/- 34.5 ml/min. Group 1 had a significant decrease in the phenolsulfonphthalein excretion test (p less than 0.01) and the maximum urine specific gravity in Fishberg's concentration test (p less than 0.02). Group 1 had a significant high incidence of glomerular sclerotic lesions (p less than 0.001), arteriolar elastosis (p less than 0.01), tubulo-interstitial changes (p less than 0.001) and renal deposition of lysozyme (p less than 0.001). The present study demonstrates that the immunohistological study of renal beta 2-MG deposition is a reliable method to identify renal dysfunction and renal injuries, especially the presence of tubulo-interstitial changes, in various renal diseases.
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Affiliation(s)
- S Suzuki
- Department of Medicine (II), Niigata University School of Medicine, Japan
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Miura Y, Ishiyama T, Inomata A, Takeda T, Senma S, Okuyama K, Suzuki Y. Radiolucent bone cysts and the type of dialysis membrane used in patients undergoing long-term hemodialysis. Nephron Clin Pract 1992; 60:268-73. [PMID: 1565178 DOI: 10.1159/000186764] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The relationship between the types of dialysis membrane used and the prevalence and severity of radiolucent bone cysts (which are a main radiological feature of dialysis amyloidosis) was studied in 30 patients on hemodialysis for more than 10 years. One of them was treated exclusively with cuprophane; the other 29 were dialyzed with cuprophane, and then treated with polyacrylonitrile AN 69. In 12 of the 30 patients, radiolucent bone cysts (at least 5 mm in diameter in the wrists and at least 10 mm in the shoulders or hips) were observed. The patients with bone cysts spent significantly more time on cuprophane dialysis and significantly less time on AN 69 dialysis than the group of patients without bone cysts. Nine of the 14 patients who had been treated with cuprophane for more than 8 years had bone cysts; whereas bone cysts were observed in only 2 of the 12 patients dialyzed for more than 8 years with AN 69. The frequency of bone cysts was significantly different for each of the two groups. There was, however, no significant difference in the total duration of dialysis between the two groups. The severity of the cystic bone lesions correlated positively with the duration of dialysis using cuprophane and negatively with the duration of dialysis using AN 69. These findings suggest that the development of osteoarticular amyloidosis may be related to the type of dialysis membrane used. Hemodialysis using AN 69 membranes may prevent, or at least postpone the development of dialysis amyloidosis.
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Affiliation(s)
- Y Miura
- Department of Nephrology, Akita Kumiai General Hospital, Japan
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Sato H, Suzuki S, Kobayashi H, Ogino S, Inomata A, Arakawa M. Immunohistological localization of apolipoproteins in the glomeruli in renal disease: specifically apoB and apoE. Clin Nephrol 1991; 36:127-33. [PMID: 1934668] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Recently it has become clear that abnormalities of the lipid metabolism may play a large role in the progression of renal diseases. To investigate the relationship between lipids and kidney tissues, the authors employed an immunofluorescent technique to determine the presence of apolipoprotein (apo) B and E in kidney tissue, particularly the glomeruli, and analyzed the relationship between their deposition and the clinical and histological findings of a total of 49 patients with persistent proteinuria and/or hematuria (age range: 10 to 62 years). The patients were divided into 4 groups, as follows: both apoB and apoE negative cases (Group 1; 17 cases), apoB alone positive (Group 2; 7 cases), apoE alone positive (Group 3; 10 cases) and both apoB and apoE positive cases (Group 4; 15 cases). Group 2 had more severe proteinuria and a higher level of total cholesterol than Group 1. Group 3 exhibited a higher incidence of glomerular adhesion and interstitial changes than Group 1. Group 4, on the other hand, exhibited more severe mesangial hypercellularity and a higher incidence of glomerular sclerosis and interstitial scarrings than Group 1, a higher incidence of glomerular sclerosis than Group 2, more severe proteinuria, higher serum levels of total cholesterol, and lower serum levels of total protein than Groups 1 and 3 and higher level of uric acid than Group 1. These results suggest that the deposition of apoB and apoE accelerates the progression of mesangial lesions, resulting in greater proteinuria and glomerular sclerosis.
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Affiliation(s)
- H Sato
- Department of Medicine (II), Niigata University School of Medicine, Japan
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Inomata A, Junker G. Path-integral quantization of Kaluza-Klein monopole systems. Phys Rev D Part Fields 1991; 43:1235-1242. [PMID: 10013493 DOI: 10.1103/physrevd.43.1235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Suzuki Y, Hasegawa H, Ushiyama E, Inomata A, Satoh H, Ogino S, Ohnish Y, Arakawa M. [A case of nephrotic syndrome with membranous nephropathy and renal tuberculous granuloma]. Nihon Naika Gakkai Zasshi 1989; 78:1181-6. [PMID: 2809389 DOI: 10.2169/naika.78.1181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Nakano M, Ozawa T, Nishi S, Inomata A, Satoh H, Kikuchi M, Ogino S, Satoh T, Suzuki S, Maruyama Y. [Clinicopathological study of renal disorders in patients with rheumatoid arthritis]. Nihon Naika Gakkai Zasshi 1989; 78:21-9. [PMID: 2732571 DOI: 10.2169/naika.78.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Endo Y, Inomata A, Horiuchi R, Yasui S. [A case of arrhythmogenic right ventricular dysplasia with abnormal Q waves in ECG]. Kokyu To Junkan 1988; 36:205-9. [PMID: 3387698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Inomata A, Endo Y, Motegi A, Saito H, Kaneko K. [A successful surgical case of secundum atrial septal defect with tricuspid regurgitation associated with tricuspid valve prolapse and partial anomalous pulmonary venous return]. Kyobu Geka 1985; 38:750-5. [PMID: 4079190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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42
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Kuribayashi R, Kaneko K, Inomata A. [Ball thrombus of the left atrium: a case report of a successful removal]. Nihon Kyobu Geka Gakkai Zasshi 1985; 33:516-20. [PMID: 4020191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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43
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Yasunari S, Kuribayashi Y, Inomata A, Kaneko K. [A case of idiopathic peripheral pulmonary aneurysm]. Kyobu Geka 1985; 38:210-5. [PMID: 3999490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Inomata A. [Extended aortic bypass operation for dissecting aortic aneurysm of De Bakey type III: experimental and clinical studies]. Nihon Geka Gakkai Zasshi 1983; 84:392-403. [PMID: 6674802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
For the purpose to achieve good operative results of dissecting aortic aneurysm of De Bakey type III, an extended aortic bypass operation was utilized in our institute. Experimental study: Twenty two mongrel dogs were operated upon by placing bypass graft between the descending aorta distal to the left subclavian artery and the infrarenal abdominal aorta. The descending aorta distal to the proximal anastomosis was divided and closed. Fifteen dogs survived operations. Thrombus formation in the distal descending aorta was noted in all animals, but not extended beyond the level of coeliac artery. In six dogs which survived more than three months after the operation thrombi were well organized. Clinical application: four patients were operated upon using this operative procedure. Three patients survived the operation, but one patient who had previous abdominal reconstruction for ruptured aneurysm developed paraplegia postoperatively and eventually died from prolonged respiratory failure five months after operation. Two patients have been in excellent health until 10 to 26 months after operation and postoperative aortograms showed conspicuous thromboexclusion of the distal descending aorta. It is concluded that extended aortic bypass operation is useful for the surgical treatment of De Bakey type III aortic dissection.
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Inomata A, Nieda S, Abe T. [Clinical application of fiber optic cable for mitral valve operations]. Kyobu Geka 1983; 36:210-1. [PMID: 6855036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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46
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Kuribayashi R, Inomata A, Gomi H, Nishimaru I. [Open heart surgery without left ventricular vent]. Nihon Kyobu Geka Gakkai Zasshi 1982; 30:1346-1350. [PMID: 7142765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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47
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Ota T, Toriumi F, Koyama R, Numazawa T, Inomata A. [Nursing process: nursing of patients with hyperthyroidism. Nursing of a patient with hyperthyroidism: a case study]. Kurinikaru Sutadi 1982; 3:919-28. [PMID: 6923118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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48
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Toriumi F, Ota T, Koyama R, Numazawa T, Inomata A. [Nursing process: nursing of patients with hyperthyroidism. Nursing process of patients with hyperthyroidism]. Kurinikaru Sutadi 1982; 3:913-8. [PMID: 6923117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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49
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Inomata A, Nieda S, Okubo T, Sakurada T, Takano H, Tonooka I, Mita S, Hoshino R, Abe T, Sato M. [Extended aortic bypass operation for dissecting aortic aneurysm of Debakey type IIIb (author's transl)]. Kyobu Geka 1981; 34:705-9. [PMID: 7300071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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50
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Kawamura T, Inomata A, Wada J. [Hemodynamic study of atrial and ventricular pacing in experimental mitral regurgitation (author's transl)]. Nihon Kyobu Geka Gakkai Zasshi 1981; 29:1012-8. [PMID: 7299187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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